JP7213115B2 - Pile construction management method, pile construction management system, and mobile terminal constituting pile construction management system - Google Patents

Description

The present invention relates to a pile construction management method, a pile construction management system, and a mobile terminal constituting the pile construction management system.

When constructing pile foundations, a steel pipe rotary press-in method is applied, in which a steel pipe pile with a helical wing attached to the tip of the steel pipe is pressed into the ground by rotary pressing into the ground using a pile driver. be done. The cast-in-place pile method generates excavated soil that becomes industrial waste, but the steel pipe rotary press-in method can eliminate the generation of this industrial waste. Less load on impact. In addition, by using steel pipe piles with a pile diameter corresponding to the size of the building, it can be applied to pile foundations of buildings of various sizes, from small-scale buildings such as detached houses to large-scale buildings such as condominiums.

As a construction management system for rotating and pressing the steel pipe pile into the ground, a target is attached near the upper end of the steel pipe, and the position information of the target is acquired by automatically tracking the target using a total station. A construction management system has been proposed. This rotary steel pipe placing construction management system further includes an information processing device that calculates steel pipe core coordinates based on target position information and stores the calculated steel pipe core coordinates in a storage unit (for example, patent Reference 1).

By the way, in the initial stage of the steel pipe pile rotation press-in construction, the distance between the top end of the steel pipe pile and the ground is large, so the pile core position at the top end and the pile core position near the ground are different. They often do not always match. Therefore, in order to confirm that the steel pipe pile to be constructed is pressed into the ground at the correct position, it is necessary to locate the center of the pile (or the core position of the pile driving) at a place closer to the ground rather than the upper end of the steel pipe pile. ) is essential. In this regard, in the construction management system described in Patent Document 1 described above, since the target is attached to the steel pipe pile itself, the target must be provided at the upper end of the steel pipe pile. Therefore, since the total station acquires the position information of the target attached near the upper end of the steel pipe pile, there is room for improvement in terms of managing the correct construction position of the steel pipe pile.

Therefore, a construction management system has been proposed that can obtain the pile core position of a steel pipe pile near the ground. More specifically, a steel pipe by a pile driver comprising a drive unit that holds the upper end of a steel pipe pile and presses it into the ground while rotating the steel pipe pile, and a steady member that holds the steel pipe pile in the vicinity of the ground. This is a construction management system that manages the driving construction of piles. This construction management system includes a rail member provided on a steady member and formed with a second rail that surrounds the steel pipe pile, and a second magnet that slides along the second rail as the steel pipe pile rotates. , a prism attached to the second magnet, a measuring device for measuring the position of the prism, and a calculation unit for calculating the pile core position of the steel pipe pile based on the plurality of positions of the prism measured by the measuring device. I have.

A first magnet is slidably provided on the first rail, and the first magnet follows the rotation of the steel pipe pile and slides along the first rail. On the other hand, the second rail is provided with a first restricting member and a second restricting member, and the sliding range of the second magnet is defined by the first restricting member and the second restricting member. A second magnet is arranged in the sliding range. Furthermore, a construction management system is formed by arranging measuring instruments in this sliding range so as to face each other.

In the construction management system described above, the second magnet and the first magnet have magnetic poles different from each other. As the steel pipe pile rotates, the first magnet magnetically attracted to the steel pipe pile slides in the same direction as the steel pipe pile, and when the first magnet reaches the sliding range of the second magnet, it is magnetically attracted to the first magnet. The second magnet slides within the sliding range, and the position of the prism attached to the sliding second magnet is measured by a measuring instrument. According to this construction management system, when the prism attached to the second magnet is reciprocated in the sliding range between the first restricting member and the second restricting member, when the prism is viewed from the measuring instrument, Since the prism is not hidden by the steel pipe pile, the measuring instrument can always measure the position of the prism (see, for example, Patent Document 2).

Japanese Patent No. 5546416 JP 2018-53689 A

However, in the construction management system described in Patent Document 2, as the steel pipe pile rotates, the first magnet slides in the same direction as the steel pipe pile, and as the first magnet slides, the first magnet Since the second magnet, to which the prism is attached in the same direction as the , is slid in the sliding range between the first and second regulating members, The configuration of the included jig tends to be complicated.

The present invention has been made in view of the above problems, and can perform construction management of steel pipe piles while accurately specifying the pile core position of the steel pipe pile in the vicinity of the ground without having a complicated jig. It is an object of the present invention to provide a pile construction management method, a pile construction management system, and a mobile terminal constituting the pile construction management system.

In order to achieve the above object, one aspect of the pile construction management method according to the present invention is
A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A pile construction management method used when constructing a steel pipe pile by
A step of measuring the angle θ1 from the N pole of the X-axis or Y-axis constituting the pile drawing using an electronic compass;
A target is fixed on the anti-vibration member or on the ground, and an angle θ2 from the N pole of a straight line connecting the driving core of the steel pipe pile and the target is measured,
A step B of measuring an installation angle θ3 of the electronic compass from the N pole and obtaining a relative angle between the installation angle of the electronic compass and a straight line connecting the driving core of the steel pipe pile and the target, A calibration step of calibrating the angle between the X-axis or the Y-axis and the N pole that constitutes the pile plan and the installation angle of the target and the electronic compass by the A step and the B step;
While maintaining the relative angle θ3−θ2 between the angle θ2 of the straight line and the installation angle θ3 constant, the fixed positions (X _A , Y _A ) of the target fixed around each steel pipe pile to be constructed are measured. Measured by a device, the installation angle ω from the N pole of the electronic compass installed around the steel pipe pile, the angle θ1 specified in the calibration process, the relative angle θ3-θ2, measured in advance. and a pile core position specifying step of specifying the pile core position of the steel pipe pile by the following formula (A) using the fixed position of the target set and the distance r to the driving core. and

Here, the "measuring instrument" may be a general total station that collimates the target with a lens and measures the angle and distance at the same time, or the total station has an automatic tracking function that automatically collimates the target. It may be an automatic tracking type total station. Moreover, as a "target", prisms, such as a reflecting prism, are mentioned.

In addition, one aspect of the pile construction management system according to the present invention is
A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A pile construction management system used when constructing a steel pipe pile by
a target installed either on the steady-state member or on the ground surrounding the steel pipe pile;
a measuring instrument for measuring the position of the target;
an electronic compass that measures at least the angle from the N pole of the X-axis or Y-axis that constitutes the pile plan data;
a mobile terminal owned by an operator of the base machine or a construction manager;
The mobile terminal is
a receiving unit that receives position data regarding the position of the target transmitted from the measuring instrument and angle data transmitted from the electronic compass;
a storage unit in which the position data, the angle data, and the pile plan data are stored;
and a calculation unit that calculates a pile core position of the steel pipe pile based on the position data and the angle data.

According to this aspect, a target is installed on the steady rest member or on the ground around the steel pipe pile, and the target is measured by a measuring instrument, and at least the X-axis or Since it is a construction management system that measures the angle from the N pole of the Y axis with an electronic compass, the system does not require a complicated jig. In addition, the position of the pile core of the steel pipe pile is calculated by a mobile terminal based on the measurement data on the position of the target on the anti-vibration member near the ground or on the ground. It is possible to specify the pile core position of the steel pipe pile with high accuracy. Here, mobile terminals include smartphones, tablets, personal computers, and the like.

Another aspect of the pile construction management system according to the present invention has an annular jig, the jig being formed by joining two half jigs together,
The target is fixed to one of the two halving jigs,
A roller is attached to the inner surface of the annular jig and is capable of contacting the steel pipe pile,
The jig is mounted on the anti-vibration member so as to be relatively movable with respect to the anti-vibration member.

According to this aspect, in the form in which the target is fixed on the anti-vibration member, the target is fixed on the annular jig formed by joining the halved jigs to each other, and the jig Since the roller is attached to the steel pipe pile on the inner surface of the roller so that it can freely contact the steel pipe pile, the jig to which the target is fixed is cut off from the steel pipe pile in a rotating posture, and the pile core of the steel pipe pile and the annular jig are separated. The center can be aligned as much as possible. For example, there is generally a clearance of about 10 mm to 20 mm between the anti-vibration member and the steel pipe pile passing through it. Therefore, when the target is placed directly on the anti-vibration member, an error due to this clearance occurs between the center of the anti-vibration member and the pile core of the steel pipe pile that can move within this clearance. obtain. The error between the pile core of the steel pipe pile and the center of the anti-vibration member can affect the accuracy of the pile core position calculated based on the measurement data in the portable terminal. Therefore, a plurality of rollers that can freely contact the steel pipe piles are attached to the inner surface of the jig, and the clearance between the jig (rollers) and the steel pipe piles is set to 0 mm (all the rollers contact the steel pipe piles). By making it about 1 or 2 mm at most, it is possible to reduce the error caused by the clearance between the jig and the steel pipe pile, and improve the accuracy of the pile core position calculated by the mobile terminal. can be done.

Another aspect of the pile construction management system according to the present invention has an annular jig, the jig being formed by joining two half jigs together,
The target is fixed to one of the halved jigs,
A roller is attached to the inner surface of the annular jig and is capable of contacting the steel pipe pile,
The jig is placed on the ground surrounding the steel pipe pile.

According to this aspect, in the form in which the target is fixed on the jig placed on the ground, the annular jig is formed by joining two half-split jigs to each other. Since the roller is attached to the steel pipe pile on the inner surface of the roller so that it can freely contact the steel pipe pile, the jig to which the target is fixed is cut off from the steel pipe pile in a rotating posture, and the pile core of the steel pipe pile and the annular jig are separated. The center can be aligned as much as possible. Therefore, similar to the form in which the target is fixed on the anti-vibration member described above, the error caused by the clearance between the jig and the steel pipe pile can be reduced, and the pile core position calculated on the mobile terminal can improve the accuracy of

In another aspect of the pile construction management system according to the present invention, two or more target fixing pins projecting upward to fix the target are attached to the upper surface of the jig, and According to this aspect, a plurality of target fixing pins are attached to the upper surface of the jig, By selecting a target fixing pin at a position measurable from the measuring instrument and fixing the target, it is possible to reliably collimate the target with the measuring instrument while corresponding to the installation location of the measuring instrument.

Further, in another aspect of the pile construction management system according to the present invention, four or more jig fixing pins projecting upward and to which the jig is fixed are attached to the upper surface of the anti-vibration member,
The jig is provided with pin holes corresponding to the four or more jig fixing pins and having larger dimensions than the jig fixing pins,
The jig fixing pin is inserted into the pin hole with a clearance.

According to this aspect, the jig fixing pin of the anti-vibration member is inserted with a clearance into the pin hole of the jig, and the jig is placed on the anti-vibration member. As a result, the jig can follow the horizontal displacement of the steel pipe pile that is press-fitted by rotation, and as a result, the target fixed to the jig can follow. Also, the anti-vibration member is generally formed by two halves that are rotatably attached via a pivot shaft. At least two jig fixing pins (at least four in total) are attached to the upper surface of each of the two half members, and two or more jigs are attached to the two half jigs forming the jig. Two or more pin holes are opened at positions corresponding to the jig fixing pins. By fixing the halved jig to (the halved member constituting the anti-vibration member) with at least two jig fixing pins, the relative position of the halved jig to the anti-vibration member can be greatly changed. (only relative displacement at the clearance between the pin hole and the jig fixing pin), the halved jig can be positioned. Then, when removing the pin connecting the half-split members that make up the anti-vibration member, rotating the half-split member around the rotation shaft to open it, and removing the anti-vibration member from the steel pipe pile, the half-split member Similarly, the split jig is also opened and the jig is split into two.

In another aspect of the pile construction management system according to the present invention, the storage unit includes:
Angle θ1 from the N pole of the X-axis or Y-axis that constitutes the pile survey data,
Angle θ2 of a straight line connecting the driving core of the steel pipe pile and the target,
the angle θ3 of the electronic compass from the north pole,
Fixed positions (X _A , Y _A ) of the targets fixed around each steel pipe pile to be constructed,
a distance r between the fixed position of the target and the placement core;
An installation angle ω from the N pole of the electronic compass installed around the steel pipe pile is stored,
The calculation unit is characterized in that the pile core position of the steel pipe pile is specified by the following formula (A).

According to this aspect, the position of the pile core of the steel pipe pile that has been rotationally press-fitted can be specified with high accuracy by using both the measurement of the target by the measuring device and the electronic compass, without the need for a complicated jig. can.

In addition, one aspect of the mobile terminal that constitutes the construction management system for piles according to the present invention is
A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A mobile terminal that constitutes a pile construction management system used when constructing a steel pipe pile,
The pile construction management system comprises a target fixed on the anti-vibration member or on the ground surrounding the steel pipe pile, a measuring instrument for measuring the position of the target, and pile plan data. an electronic compass that measures at least the angle of the X-axis or Y-axis from the N pole,
The mobile terminal is
a receiving unit that receives position data regarding the position of the target transmitted from the measuring instrument and angle data transmitted from the electronic compass;
a storage unit in which the position data, the angle data, and the pile plan data are stored;
a computing unit that computes the pile core position of the steel pipe pile based on the position data and the angle data;
and a display unit for displaying the result of calculation by the calculation unit.

According to this aspect, it is possible to check the pile core position of the steel pipe pile calculated by the calculation section on the display section of the mobile terminal. For example, a portable terminal is placed in the operator's seat of the base machine, and the operator of the pile driver can carry out rotational press-fitting of the steel pipe pile while checking the calculation results displayed on the display unit.

Further, in another aspect of the mobile terminal constituting the pile construction management system according to the present invention, the display unit displays a plane coordinate system, displays an allowable pile core error range in the plane coordinate system, The position of the pile core calculated by the calculation unit is displayed.

According to this aspect, the plane coordinate system (for example, XY plane coordinates) is displayed on the display section, and the allowable pile core error range is displayed in the plane coordinate system, and the pile core calculated by the calculation section is displayed. By displaying the position of , the operator of the pile driver and the construction manager can continue the construction of the steel pipe pile while confirming that the specified pile core is within the allowable pile core error range. In addition, when the pile core is likely to be out of the allowable pile core error range, the rotational press-in direction can be adjusted on the fly. Furthermore, when the pile core is out of the allowable pile core error range, the construction can be immediately interrupted and the steel pipe pile can be placed again at the correct position.

As can be understood from the above description, according to the pile construction management method, the pile construction management system, and the mobile terminal that constitutes the pile construction management system of the present invention, the ground can be Construction management of steel pipe piles can be performed while accurately specifying the pile core position of the steel pipe pile in the vicinity.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of the whole structure of the construction management system of the pile which concerns on embodiment. It is a perspective view which shows the situation before the anti-vibration member, the target, and the electronic compass are installed around the lower part of the steel pipe pile. It is a perspective view which shows the situation where the anti-vibration member, the target, and the electronic compass were installed around the lower part of a steel pipe pile. It is a perspective view which shows the situation before the anti-vibration member, the jig, the target, and the electronic compass are installed around the lower part of the steel pipe pile. It is a perspective view which shows the situation where the anti-vibration member, the jig|tool, the target, and the electronic compass were installed in the circumference|surroundings of the lower part of a steel pipe pile. FIG. 6 is a view taken along line VI-VI in FIG. 5; It is a figure which shows an example of the hardware constitutions of the portable terminal which the construction management system of a pile which concerns on embodiment has. It is a figure which shows an example of a functional structure of a portable terminal. FIG. 4 is a diagram explaining the calibration process, in which (a) is a diagram explaining the angle θ1 between the axis (Y-axis) of the pile plan and the N pole, and (b) is the driving core of the steel pipe pile. and a diagram for explaining an angle θ2 between a straight line passing through the target and the N pole, and an installation angle θ3 of the electronic compass from the N pole, and (c) is a diagram for collectively explaining θ1, θ2, and θ3. . FIG. 4 is a diagram explaining the pile core position specifying process, and (a) is a diagram explaining the position of the target around the steel pipe pile being driven and ω′ set by θ3−θ2 and θ1. and (b) is a diagram for explaining the installation angle ω of the electronic compass from the N pole. It is a flowchart of an example of the construction management method of the pile which concerns on embodiment. It is a figure which shows an example of the display content in the display part of a portable terminal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A pile construction management system, a mobile terminal constituting the pile construction management system, and a pile construction management method according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In addition, in the present specification and drawings, substantially the same components may be denoted by the same reference numerals, thereby omitting duplicate descriptions.

[Pile construction management system according to the embodiment]
First, an example of a pile construction management system according to an embodiment will be described with reference to FIGS. 1 to 6. FIG. Here, FIG. 1 is a diagram showing an example of the overall configuration of the pile construction management system according to the embodiment. In addition, FIGS. 2 and 3 are respectively a perspective view showing the situation before the anti-vibration member, the target, and the electronic compass are installed around the lower part of the steel pipe pile, and FIG. It is a perspective view which shows the installed condition. 4 and 5 are respectively a perspective view showing the situation before the anti-vibration member, the jig, the target, and the electronic compass are installed around the lower part of the steel pipe pile, the anti-vibration member, the jig, FIG. 4 is a perspective view showing a situation in which a target and an electronic compass are installed; Furthermore, FIG. 6 is a view taken along line IV-IV in FIG.

The pile construction management system 500 includes a target 100 installed around the steel pipe pile P and near the ground (including on the ground), an electronic compass 150, and a lens collimating the target 100. A measuring instrument 200 for measuring the distance and angle to a target 100 and a mobile terminal 300. The mobile terminal 300 is connected to a base machine 10 that constitutes a pile driver 90 that rotationally presses a steel pipe pile P into the ground G. is installed. The measuring instrument 200, the electronic compass 150, and the mobile terminal 300 can communicate via a network 400 represented by the Internet, a LAN (Local Area Network), or the like. The measurement data regarding the position coordinates of the target 100 obtained by the measuring instrument 200 and the measurement data regarding various angles obtained by the electronic compass 150 are transmitted to the mobile terminal 300 via the network 400 .

The pile driver 90 includes a base machine 10, a leader 20 supported by the base machine 10, an auger 30 descending along the leader 20, and a steadying member attached at a position near the ground under the leader 20. 50. The upper end of the steel pipe pile P is gripped by the cap 40 at the lower end of the auger 30, and the lower part of the steel pipe pile P is loosely fitted in the hollow of the anti-vibration member 50. Then, the auger 30 is rotated in the Y1 direction to the leader 20 The steel pipe pile P is pressed into the ground G in the Y4 direction while rotating in the Y3 direction. In addition, although the steel pipe pile P in the illustrated example has a helical wing P1 at its tip, steel pipe piles of various forms, such as a form having a helical wing also on the side surface of the steel pipe pile P, can be constructed.

As shown in FIG. 1, the target 100 and electronic compass 150 are fixed on the anti-vibration member 50 . The measuring instrument 200 is, for example, an automatic tracking type total station. The angle and horizontal angle are obtained, and the position coordinates of the target 100 are calculated.

The total station 200 incorporates a computer and has a communication interface that enables communication with an external device (such as the mobile terminal 300 in the illustrated example) (both not shown). The total station 200 may be installed on a known point whose position coordinates are known, and the coordinate information of the known point may be input to a computer, or the position coordinates of one or more known points whose position coordinates are known may be measured. The coordinate information may be input to the computer, and the position coordinates of the known points stored in the computer are referred to and the position coordinates are calculated based on the measurement data regarding the target 100 .

Next, two types of installation modes of the target and the electronic compass installed on the anti-vibration member 50 will be described. 2 and 3 are diagrams illustrating one type of installation mode.

As shown in FIG. 2, the anti-vibration member 50 has two semi-doughnut-shaped half-split members 51 in plan view, and each half-split member 51 is attached to the leader fixing portion 59 via a pivot shaft 54. It is rotatably mounted. Each half-split member 51 has two upper and lower chucks 53 at its ends. When the split member 51 is rotated in the X2 direction toward the steel pipe pile P, both chucks 53 are vertically aligned and the through holes of both chucks 53 communicate vertically. By inserting the chuck pin 55 into the communicating through-hole in the X3 direction, as shown in FIG.

Returning to FIG. 2, two magnetic stands 61 are attached to the upper surface 52 of each half member 51, and target fixing pins 60 are fixed to the magnetic stands 61 so as to extend upward. there is

The socket 104 of the target 100 and the socket 152 of the electronic compass 150 are attached to the target fixing pin 60 from above in the X4 direction and the X4' direction, respectively. Here, the target 100 in the illustrated example is an omnidirectional target provided with a plurality of prisms 102 and has a built-in spirit level (not shown). Also, the electronic compass 150 of the illustrated example may be of either a biaxial type or a triaxial type. The two-axis type uses a combination of two magnetic sensors to detect geomagnetism in the longitudinal and lateral directions. It is a form having a third geomagnetic sensor for detection.

As shown in FIG. 3, a total of four target fixing pins 60 are attached to the upper surface 52 of the anti-vibration member 50. Among them, one target fixing pin 60 capable of measuring the target 100 from the measuring instrument 200 is attached. is selected and the target 100 is attached. Also, an electronic compass 150 is attached to one of the remaining target fixing pins 60 . Incidentally, the target fixing pin 60 may be welded to the upper surface 52 of the anti-vibration member 50, or may be fixed in another fixing manner. Moreover, the number of the target fixing pins 60 should be at least two or more, and the number of the target fixing pins 60 other than four may be applied.

Further, as described in detail below, the pile construction management method according to the embodiment has a calibration process and a pile core position specifying process, and in the calibration process, the axis of the pile plan (for example, the Y axis) and the N The angle θ1 with the pole, the angle θ2 between the straight line passing through the driving core of the steel pipe pile P and the target 100 and the N pole, and the installation angle θ3 of the electronic compass 150 from the N pole are measured, and θ3−θ2 is set. be. Then, in the pile core position specifying process, construction management is performed while specifying the pile core position of each steel pipe pile P during rotational press-in construction of a plurality of steel pipe piles P. At this time, the setting is performed in the calibration process. A target 100 and an electronic compass 150 are installed around the steel pipe pile P so that the current θ3-θ2 is maintained. That is, in the calibration process and the pile core position specifying process, the fixed position of the target 100 is set as close to the ground as possible as shown in FIGS. In addition to the fixed position of the target 100, it may be installed in the operator's seat of the base machine 10 or the portable terminal 300 mounted in the operator's seat. When the target 100 and the electronic compass 150 are installed on the upper surface 52 of the anti-vibration member 50 as shown in FIGS. When the compass 150 is installed, the anti-vibration member 50 and the cockpit move in the same manner, and as a result, the base machine 10 must be operated so that θ3-θ2 becomes constant.

FIG. 4 and FIG. 5 are diagrams illustrating other installation modes of the targets and the electronic compass that are installed on the anti-vibration member 50. FIG.

As shown in FIG. 4, two magnetic stands 61 are attached to the upper surface 52 of each half member 51, and jig fixing pins 62 extend upward from the magnetic stands 61. Fixed.

Then, two halving jigs 71 having a half-doughnut shape in plan view like the halving member 51 are placed on the two magnetic stands 61 . More specifically, the halved jig 71 has pin holes 72 at least at positions corresponding to the jig fixing pins 62 , and the corresponding jig fixing pins 62 are inserted into the respective pin holes 72 . As a result, the halving jig 71 is placed on the two magnetic stands 61 in the X5 direction.

In this way, the half jig 71 is fixed to the half members 51 constituting the anti-vibration member 50 via at least two jig fixing pins 62 , so that the half jig 71 is attached to the anti-vibration member 50 . can be positioned without a large amount of movement with respect to In the illustrated example, the halved jig 71 is fixed by two jig fixing pins 62, but the halved jig 71 has three or more pin holes 72, and three or more jigs can be attached. A configuration in which the halved jig 71 is fixed to the halved member 51 via the fixing pin 62 may be employed.

Target fixing pins 60A are fixed to two points on the upper surface of the halved jig 71 in such a manner as to extend upward. The sockets 152 are mounted from above in the X6 and X6' directions.

Two rollers 73 are rotatably attached to the inner side surface 75 of the halving jig 71 so as to be in contact with the steel pipe pile P. As shown in FIG.

By rotating the half-split member 51 toward the steel pipe pile P side in the X2 direction and inserting the chuck pin 55 in the X3 direction, as shown in FIG. 50 is formed, and the ends of the two halved jigs 71 are also brought into contact with each other to form the annular jig 70 . When removing the anti-vibration member 50 from the steel pipe pile P, the two half-split members 51 are rotated to release the anti-vibration member 50 as shown in FIG. When the anti-vibration member 50 is released, the jig 70 is also split into two halved jigs 71 at the same time.

As shown in FIGS. 5 and 6, the pin holes 72 are set larger than the jig fixing pins 62 . Therefore, a constant clearance s1 is formed between the pin hole 72 and the jig fixing pin 62 . In this manner, the jig 70 is placed on the anti-vibration member 50 with the clearance s1 between the pin hole 72 and the jig fixing pin 62, so that the jig 70 is mounted on the anti-vibration member. 50 are positioned so as to be slightly movable relative to each other. Therefore, the jig 70 can follow the horizontal displacement of the steel pipe pile P that is rotationally press-fitted, and as a result, the target 100 fixed to the jig 70 can follow.

In addition, since a plurality of rollers 73 are attached to the steel pipe pile P on the inner surface 75 of the jig 70 so as to freely abut on the steel pipe pile P, the jig 70 to which the target 100 is fixed is cut off from the steel pipe pile P in the rotational posture. However, the pile core of the steel pipe pile P and the center of the annular jig can be aligned as much as possible.

Here, as shown in FIG. 6 , generally there is a clearance s2 of about 10 mm to 20 mm between the anti-vibration member 50 and the steel pipe pile P penetrating through it. Therefore, when the target 100 is directly placed on the anti-vibration member 50, the clearance s2 errors due to The error between the center of the pile core of the steel pipe pile P and the center of the anti-vibration member 50 can affect the accuracy of the pile core position calculated by the portable terminal 300 based on the measurement data. Therefore, by attaching a plurality of rollers 73 that rotatably protrude from the inner surface 75 of the jig 70 to the steel pipe pile P side, the clearance s3 between the rollers 73 and the steel pipe pile P is reduced to 0 mm (a plurality of rollers 73 are all in contact with the steel pipe pile P), the distance is about 1.2 mm at most. As a result, errors caused by the clearance between the jig 70 and the steel pipe pile P can be reduced, and the accuracy of the pile core position calculated by the mobile terminal 300 can be improved.

Throughout the rotation press-fitting of the steel pipe pile P, the position coordinates of the target 100 are measured at any time by the total station 200. It is transmitted to the terminal 300 at any time. In the mobile terminal 300, the pile core position of the steel pipe pile P to be rotationally press-fitted is calculated and displayed at any time by a method described in detail below. The operator of the pile driver can carry out rotational press-fitting of the steel pipe pile P while checking the calculation result displayed on the mobile terminal 300 . The portable terminal 300 may be placed in the operator's seat of the base machine 10 as shown in the figure. The calculation results displayed on the mobile terminal may be checked, or both the operator and the construction manager may have mobile terminals and each may check the calculation results displayed on the mobile terminal.

According to the illustrated pile construction management system 500, it is possible to perform construction management of the steel pipe pile P while accurately specifying the pile core position of the steel pipe pile P in the vicinity of the ground G without having a complicated jig. can.

In the illustrated pile construction management system 500, the target 100 fixed on the anti-vibration member 50 or on the jig 70 on the anti-vibration member 50 is collimated by the total station 200. However, the target 100 may be fixed on the ground around the steel pipe pile, for example, or the jig 70 is placed on the ground around the steel pipe pile, and the target fixed on the upper surface of the jig 70 It may be fixed to pin 60A.

[Portable Terminal Constituting Pile Construction Management System According to Embodiment and Pile Construction Management Method]
Next, with reference to FIGS. 7 to 12, an example of a portable terminal constituting the pile construction management system according to the embodiment and an example of a pile construction management method will be described. Here, FIG. 7 is a diagram showing an example of the hardware configuration of a mobile terminal included in the pile construction management system according to the embodiment, and FIG. 8 is a diagram showing an example of the functional configuration of the mobile terminal. 9A and 9B are diagrams for explaining the calibration process, and FIG. 9A is a diagram for explaining the angle θ1 between the axis (Y-axis) of the pile plan and the N pole, and FIG. b) is a diagram for explaining the angle θ2 between the straight line passing through the driving core of the steel pipe pile and the target and the N pole, and the installation angle θ3 of the electronic compass from the N pole; It is a figure which collectively explains (theta)2 and (theta)3. FIG. 10 is a diagram for explaining the pile core position specifying process, and FIG. 10(a) shows the position of the target around the steel pipe pile being driven and the 10(b) is a diagram for explaining the installation angle ω of the electronic compass from the N pole. Moreover, FIG. 11 is a flowchart of an example of the pile construction management method according to the embodiment. Furthermore, FIG. 12 is a diagram showing an example of display contents on the display unit of the mobile terminal.

The mobile terminal 300 is formed by a smart phone, a tablet, a personal computer, or the like, and FIG. 12 shows the mobile terminal 300 formed by a tablet.

As shown in FIG. 7, the mobile terminal 300 includes a CPU (Central Processing Unit) 302, a RAM (Random Access Memory) 304, a ROM (Read Only Memory) 306, a wireless communication device 308, a display device 310, and an input device 312. and are connected by a system bus 314 so as to be capable of data communication.

The ROM 306 stores various programs and data used by the programs. The RAM 304 is used as a storage area for loading programs stored in the ROM 306 and as a work area for the loaded programs. The CPU 302 implements various functions by processing programs loaded in the RAM 304 . For example, using the measurement data about the target 100 transmitted from the measuring instrument 200 and various angle data transmitted from the electronic compass 150, the pile core position of the steel pipe pile is calculated, and the control to display the calculation result. to run. In addition, the portable terminal 300 may have an auxiliary storage device (not shown) for storing programs installed thereon.

The display device 310 is composed of a liquid crystal display or the like, and has a display function of a touch panel, for example. The input device 312 is an electronic component having a sensor that detects contact of a contact with the display device 310 . Methods for detecting the contact of the contact body include an electrostatic method, a resistive film method, an optical method, and the like. The contact body may be a finger of an operator or the like, a dedicated pen, or the like. A wireless communication device 308 is an electronic component such as an antenna that is necessary for communication in a wireless LAN, mobile communication network, or the like.

Under the control of the CPU 302, the mobile terminal 300 functions as the receiver 320, the calculator 330, the display 340, and the storage 350 shown in FIG.

In the process of rotational press-fitting of the steel pipe pile P, the measurement data (including the positional coordinate data of the target 100 calculated by the measuring instrument 200) on the target 100 by the measuring instrument 200 and the angle ω by the electronic compass 150 (see FIG. 10(b) ) is obtained at any time, and the measurement data about the target 100 and the angle ω transmitted from the measuring instrument 200 and the electronic compass 150 at any time is received at the receiving unit 320 at any time. Each received measurement data is stored in the storage unit 350 as needed.

In the storage unit 350, the pile driving positions of the plurality of steel pipe piles P to be constructed are shown in the XY coordinate system. position coordinate data), distance data from the target 100 to the pile core of the steel pipe pile P, and allowable pile core error data (allowable between the pile core of the steel pipe pile to be constructed and the design pile core data on the error range), etc. are stored. The distance data from the target 100 to the pile core of the steel pipe pile P is measured after one target fixing pin 60 is selected and the target 100 is attached as shown in FIG. be. Also, in the calibration process and the pile core position specifying process, various angle data are measured by the electronic compass 150 and the measured data are stored in the storage unit 350 .

The calculation unit 330 reads each measurement data relating to the target 100 and various angle data from the storage unit 350, and calculates the pile core position of the steel pipe pile P to be rotationally press-fitted as needed. A calculation method in the calculation unit 330 will be described below.

Next, the pile construction management method according to the embodiment will be described together with the calculation method in the calculation unit 330 . The pile construction management method includes a calibration process and a pile core position specifying process. In the pile core position specifying process, the pile core position of the steel pipe pile P to be rotationally press-fitted is specified as needed by the calculation method in the calculation unit 330. .

First, a method of setting a predetermined angle in the calibration process will be described with reference to FIGS. 9 and 11. FIG. First, as shown in FIGS. 9A and 11, the electronic compass 150 is used to measure the angle θ1 of the Y-axis from the N pole in the pile plan data (step S1, process A). At a construction site, a surveying thread is stretched so that the X-axis and Y-axis of the pile plan can be specified. An angle θ1 of the Y-axis of the plan is measured. In addition, the angle from the N pole of the X-axis in the pile plan data may be measured. In the pile plan data, the driving core position of the steel pipe pile P is set at each grid point in the XY coordinate system.

Next, as shown in FIGS. 9B and 11, from the north pole of the straight line L1 connecting the target 100 fixed on the upper surface 52 of the anti-vibration member 50 and the driving core O of the steel pipe pile P is measured (step S2). Further, the installation angle θ3 of the installation direction line L2 of the electronic compass 150 from the N pole is measured (step S3), and θ3−θ2, which is the difference between the installation angles θ3 and θ2, is set (step B).

Through the A process and the B process described above, the calibration of the angle between the axis of the pile plan (X-axis or Y-axis) and the N pole and the calibration of the installation angle of the target 100 and the electronic compass 150 are completed (calibration process).

Next, with reference to FIG. 10, a method for specifying the pile core position in the pile core position specifying step will be described. When specifying the pile core during construction of each steel pipe pile P, the relative angle θ3-θ2 specified in the calibration process is kept constant. As shown in FIGS. 10A and 11, the fixed position A (X _A , Y _A ) of the target 100 fixed around the steel pipe pile P to be constructed is measured by the measuring instrument 200, and the electronic compass An installation angle ω from the N pole of 150 is measured (step S4).

The installation angle ω from the N pole of the electronic compass 150 installed around the steel pipe pile P, the angle θ1 specified in the calibration process, the relative angle θ3-θ2, and the previously measured fixation of the target 100 Using the position and the distance r to the driving core, the pile core position (X ₀ , Y ₀ ) of the steel pipe pile P is specified by the following formula (1) (step S5).

The above equation (1) is stored in the storage unit 350 of the mobile terminal 300, and the calculation unit 330 calculates the pile core position of the steel pipe pile P to be rotationally press-fitted according to the equation (1) at any time, and the calculated pile The core position is displayed on the display section 340 .

As shown in FIG. 12, the display unit 340 of the mobile terminal 300 displays an XY coordinate system centered on the design pile core O of the steel pipe pile P, and further displays the allowable pile core error range. Then, the calculated pile core position calculated by the calculator 330 is plotted on the XY coordinate system.

An operator of the pile driver 90 or a construction manager can continue construction of the steel pipe pile P while confirming that the specified calculated pile core position is within the allowable pile core error range. In addition, when the calculated pile core position is likely to deviate from the allowable pile core error range, the rotational press-in direction can be adjusted on the fly. Furthermore, when the calculated pile core position is out of the allowable pile core error range, the construction can be immediately interrupted and the steel pipe pile can be re-placed at the correct position.

It should be noted that other embodiments may be possible in which other components are combined with the configurations described in the above embodiments, and the present invention is not limited to the configurations shown here. Regarding this point, it is possible to change without departing from the gist of the present invention, and it can be determined appropriately according to the application form.

10: base machine, 20: leader, 30: auger, 40: cap, 50: anti-vibration member, 51: half split member, 52: upper surface, 53: chuck, 54: rotating shaft, 55: chuck pin, 59: Leader fixing part 60, 60A: target fixing pin 61: magnetic stand 62: jig fixing pin 70: jig 71: half jig 72: pin hole 73: roller 90: piling machine, 100: target, 102: prism, 104: socket, 150: electronic compass, 152: socket, 200: measuring instrument (total station), 300: mobile terminal, 320: receiving unit, 330: computing unit, 340: display unit , 350: storage unit, 400: network, 500: pile construction management system (construction management system), G: ground, P: steel pipe pile, P1: spiral wing

Claims (9)

A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A pile construction management method used when constructing a steel pipe pile by
A step of measuring the angle θ1 from the N pole of the X-axis or Y-axis constituting the pile drawing using an electronic compass;
A target is fixed on the anti-vibration member or on the ground, and an angle θ2 from the N pole of a straight line connecting the driving core of the steel pipe pile and the target is measured,
A step B of measuring an installation angle θ3 of the electronic compass from the N pole and obtaining a relative angle between the installation angle of the electronic compass and a straight line connecting the driving core of the steel pipe pile and the target, A calibration step of calibrating the angle between the X-axis or the Y-axis and the N pole that constitutes the pile plan and the installation angle of the target and the electronic compass by the A step and the B step;
While maintaining the relative angle θ3−θ2 between the angle θ2 of the straight line and the installation angle θ3 constant, the fixed positions (X _A , Y _A ) of the target fixed around each steel pipe pile to be constructed are measured. Measured by a device, the installation angle ω from the N pole of the electronic compass installed around the steel pipe pile, the angle θ1 specified in the calibration process, the relative angle θ3-θ2, measured in advance. and a pile core position specifying step of specifying the pile core position of the steel pipe pile by the following formula (A) using the fixed position of the target set and the distance r to the driving core. A method for managing construction of piles.

A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A pile construction management system used when constructing a steel pipe pile by
a target installed either on the steady-state member or on the ground surrounding the steel pipe pile;
a measuring instrument for measuring the position of the target;
an electronic compass that measures at least the angle from the N pole of the X-axis or Y-axis that constitutes the pile plan data;
a mobile terminal owned by an operator of the base machine or a construction manager;
The mobile terminal is
a receiving unit that receives position data regarding the position of the target transmitted from the measuring instrument and angle data transmitted from the electronic compass;
a storage unit in which the position data, the angle data, and the pile plan data are stored;
A pile construction management system, comprising: a computing unit that computes a pile core position of the steel pipe pile based on the position data and the angle data. an annular jig, the jig being formed by joining two halves together;
The target is fixed to one of the two halving jigs,
A roller is attached to the inner surface of the annular jig and is capable of contacting the steel pipe pile,
3. The pile construction management system according to claim 2, wherein said jig is mounted on said vibration-damping member so as to be relatively movable with respect to said vibration-damping member. an annular jig, the jig being formed by joining two halves together;
The target is fixed to one of the halved jigs,
A roller is attached to the inner surface of the annular jig and is capable of contacting the steel pipe pile,
The pile construction management system according to claim 2, wherein the jig is placed on the ground surrounding the steel pipe pile. On the upper surface of the jig, two or more target fixing pins projecting upward and to which the target is fixed are attached, and one of the target fixing pins at a position measurable by the measuring instrument is selected. 5. The pile construction management system according to claim 3, wherein the target is fixed. Four or more jig fixing pins projecting upward from the upper surface of the anti-vibration member and to which the jig is fixed are attached,
The jig is provided with pin holes corresponding to the four or more jig fixing pins and having larger dimensions than the jig fixing pins,
The pile construction management system according to any one of claims 3 to 5, wherein the jig fixing pin is inserted into the pin hole with a clearance therebetween. The storage unit includes
Angle θ1 from the N pole of the X-axis or Y-axis that constitutes the pile survey data,
Angle θ2 of a straight line connecting the driving core of the steel pipe pile and the target,
the angle θ3 of the electronic compass from the north pole,
Fixed positions (X _A , Y _A ) of the targets fixed around each steel pipe pile to be constructed,
a distance r between the fixed position of the target and the placement core;
An installation angle ω from the N pole of the electronic compass installed around the steel pipe pile is stored,
The pile construction management system according to any one of claims 2 to 6, wherein the calculation unit specifies the pile core position of the steel pipe pile by the following formula (A).

A pile driver in which the upper end of a steel pipe pile is attached to an auger that descends along a leader of a base machine, and the steel pipe pile is inserted into an annular vibration-restraining member attached to the lower part of the leader and is rotationally press-fitted into the ground. A mobile terminal that constitutes a pile construction management system used when constructing a steel pipe pile,
The pile construction management system comprises a target fixed on the anti-vibration member or on the ground surrounding the steel pipe pile, a measuring instrument for measuring the position of the target, and pile plan data. an electronic compass that measures at least the angle of the X-axis or Y-axis from the N pole,
The mobile terminal is
a receiving unit that receives position data regarding the position of the target transmitted from the measuring instrument and angle data transmitted from the electronic compass;
a storage unit in which the position data, the angle data, and the pile plan data are stored;
a computing unit that computes the pile core position of the steel pipe pile based on the position data and the angle data;
and a display unit for displaying the result of calculation by the calculation unit, the portable terminal constituting a pile construction management system. The display unit displays a plane coordinate system, displays an allowable pile core error range in the plane coordinate system, and displays the position of the pile core calculated by the calculation unit. , a mobile terminal that constitutes the pile construction management system according to claim 8.

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