CN112681257B - Construction method for prefabricating and assembling irrigation channel and pressing top of cast-in-place concrete - Google Patents
Construction method for prefabricating and assembling irrigation channel and pressing top of cast-in-place concrete Download PDFInfo
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- CN112681257B CN112681257B CN202011566745.6A CN202011566745A CN112681257B CN 112681257 B CN112681257 B CN 112681257B CN 202011566745 A CN202011566745 A CN 202011566745A CN 112681257 B CN112681257 B CN 112681257B
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- 239000004567 concrete Substances 0.000 title claims abstract description 68
- 238000010276 construction Methods 0.000 title claims abstract description 45
- 230000002262 irrigation Effects 0.000 title claims abstract description 35
- 238000003973 irrigation Methods 0.000 title claims abstract description 35
- 238000003825 pressing Methods 0.000 title claims description 24
- 239000002689 soil Substances 0.000 claims abstract description 34
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000009415 formwork Methods 0.000 claims description 32
- 230000010485 coping Effects 0.000 claims description 22
- 238000009417 prefabrication Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000007765 extrusion coating Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009966 trimming Methods 0.000 abstract description 2
- 239000004809 Teflon Substances 0.000 abstract 1
- 229920006362 Teflon® Polymers 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000011065 in-situ storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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Abstract
本发明涉及一种灌溉渠道预制拼装与现浇混凝土压顶的施工方法，包括步骤：步骤一、在设计位置处，使用挖机进行开挖，开挖时，先利用挖机底盘前端设置的松土装置翻松预挖沟槽土，再配合U形挖斗轻松开挖U型槽基坑；步骤二、U型槽底压实后设置垫层，垫层采用混凝土铺设在土体间，在垫层上部喷涂聚四氟乙烯涂层。本发明的有益效果是：在硬土冻土的施工条件下沟槽也能一次性成型，坡面光滑平整，坡顶顺直美观，无需人工修整；预制U型槽可进行流水线生产，生产效率较高；减少了现场施工工作量；减轻了对吊装精确度的需求，降低了施工难度；解决了预制U型槽连接缝隙透水，传统混凝土压顶和混凝土渠道连接强度弱、压顶易脱落的问题。
The invention relates to a construction method for prefabricated assembly and cast-in-place concrete topping of an irrigation channel, comprising the following steps: Step 1. Excavation is carried out at a design position by using an excavator, and during excavation, the loosening soil provided at the front end of the excavator chassis is used first. The device loosens the soil in the pre-excavated trench, and then cooperates with the U-shaped bucket to easily excavate the U-shaped groove foundation pit; step 2, after the bottom of the U-shaped groove is compacted, set the cushion layer. The cushion layer is laid between the soil bodies with concrete. The upper part of the layer is sprayed with Teflon coating. The beneficial effects of the invention are as follows: under the construction conditions of hard soil and frozen soil, the groove can also be formed at one time, the slope surface is smooth and flat, the slope top is straight and beautiful, and no manual trimming is required; the prefabricated U-shaped groove can be produced in an assembly line, and the production efficiency It reduces the on-site construction workload; reduces the need for hoisting accuracy and construction difficulty; solves the problems of water penetration in the connection gap of the prefabricated U-shaped groove, weak connection strength of the traditional concrete roof and concrete channel, and the roof is easy to fall off.
Description
Technical Field
The invention relates to an artificial water channel structure for agricultural soil irrigation and/or drainage, in particular to a construction method for prefabricating and assembling an irrigation channel and pressing top by cast-in-place concrete.
Background
Concrete irrigation canals are widely applied to farmland hydraulic engineering, and how to quickly realize the prefabrication and assembly of the concrete irrigation canals and ensure the quality of cast-in-place concrete topping is of great importance. The existing irrigation channel concrete prefabrication and assembling technology has the problems of non-tight connection, water permeation of seams and the like, and the existing concrete coping has the problems of cast-in-place concrete coping and precast concrete coping, weak coping and channel connection strength and the like.
Therefore, a novel construction method for prefabricating and assembling the irrigation channel and pressing the top by the cast-in-place concrete is needed to be designed, the engineering cost is effectively reduced, the construction is carried out by adopting a centralized prefabrication and field assembly method, the construction speed is accelerated, and the problems that the traditional concrete pressing top and the concrete channel are weak in connection strength and the pressing top is easy to fall off are effectively solved by the cast-in-place concrete pressing top formwork system. Can obtain better technical and economic benefits when applied to actual engineering.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a construction method for prefabricating and assembling an irrigation channel and pressing the cast-in-place concrete, which has the advantages of low engineering cost, realization of centralized prefabrication, high field assembly speed and high connection strength of the pressing of the cast-in-place concrete, and the constructed irrigation channel.
The construction method for the prefabrication and assembly of the irrigation channel and the capping of the cast-in-place concrete comprises the following steps:
firstly, rapidly excavating a U-shaped groove:
excavating at the designed position by using an excavator; during excavation, firstly loosening the pre-excavated trench soil by using a soil loosening device arranged at the front end of the excavator chassis, and then easily excavating a U-shaped groove foundation pit by matching with a U-shaped bucket;
step two, cushion layer construction:
setting a cushion layer after the U-shaped groove bottom is compacted, paving the cushion layer between soil bodies by adopting concrete, and spraying a polytetrafluoroethylene coating on the upper part of the cushion layer;
step three, prefabricating and assembling a U-shaped groove:
mortises and tenons are respectively arranged at the two longitudinal ends of the prefabricated U-shaped groove unit; simultaneously, embedding grouting pipes at the two transverse ends of the prefabricated U-shaped groove unit; after the prefabricated U-shaped groove units are prefabricated, transporting the prefabricated U-shaped groove units to a construction site; firstly, hoisting a prefabricated U-shaped groove unit to a concrete cushion layer by using a crane, and then pushing the prefabricated U-shaped groove unit to move on a polytetrafluoroethylene coating by using a jack until the prefabricated U-shaped groove unit is successfully spliced with the previous prefabricated U-shaped groove unit through a mortise and a tenon; after the prefabricated U-shaped groove is completely spliced, injecting cement slurry into the grouting pipe, and filling a gap between the prefabricated U-shaped groove and the soil around the outer wall of the groove;
step four, waterproof treatment of connecting seams:
round grooves are formed in the two longitudinal ends of the prefabricated U-shaped groove unit, bevel edges are further formed in the two longitudinal ends of the prefabricated U-shaped groove unit, a soft column is arranged on the inner wall of the round groove in one end of the prefabricated U-shaped groove unit, and the soft column is made of chloroprene rubber; after the prefabricated U-shaped grooves are spliced, pressing a soft column in a circular groove at one end of each prefabricated U-shaped groove unit into the circular groove of the adjacent prefabricated U-shaped groove unit, and enabling the outer wall of the soft column to be in soft extrusion coating with the inner wall of the circular groove; the bevel edge of the connecting part of the prefabricated U-shaped groove forms a V-shaped groove structure, and waterproof slurry is filled in the V-shaped groove structure;
step five, pressing the cast-in-place concrete:
firstly, a formwork is erected on the inner side of a prefabricated U-shaped groove, a jacking formwork supporting system is erected by utilizing a plane formwork and a U-shaped formwork, the plane formwork and the U-shaped formwork rotate relatively through a hinge, the plane formwork is hinged to an adjustable support frame, a rotating handle of the adjustable support frame is adjusted, the plane formwork is controlled to be vertical through the stretching of a turnbuckle screw, a hanging ring screw is pre-embedded at the top of the prefabricated U-shaped groove, finally, concrete is cast on the top of the prefabricated U-shaped groove in situ to be jacked, and the concrete is vibrated and maintained, so that the construction of concrete jacking is completed.
Preferably, the method comprises the following steps: in the first step, the U-shaped bucket comprises an ear plate, a through hole, a bolt hole, a limiting scraping plate, bucket teeth, a bolt, a top plate and a bottom plate, the limiting scraping plate and the top plate are correspondingly provided with the bolt hole and connected through the bolt, the bottom plate is provided with the bucket teeth, the ear plate is arranged on the upper portion of the top plate, and the ear plate is provided with the through hole.
Preferably, the method comprises the following steps: in the first step, the soil loosening device comprises a power system, a protection plate, a depth adjusting mechanism, a transmission shaft and a soil loosening shovel blade, one end of the depth adjusting mechanism is connected with the power system and fixed at the front end of the excavator chassis, the other end of the depth adjusting mechanism is connected with the transmission shaft, the protection plate is arranged on the depth adjusting mechanism, and the soil loosening shovel blade is arranged on the transmission shaft.
Preferably, the method comprises the following steps: and in the fourth step, a circular inner cavity is arranged in the soft column, a soft inserting column is inserted into the circular inner cavity, and the soft inserting column is made of silica gel.
Preferably, the method comprises the following steps: in the fifth step, the hinge comprises a mounting hole, a leaf and a rotating shaft; the plane template and the U-shaped template are connected with the leaf through the mounting hole, and the plane template is higher than the ground surface.
Preferably, the method comprises the following steps: in the fifth step, the adjustable support frame comprises a hinged support, a rotary handle, a turnbuckle and an internal threaded pipe; the turnhandle is adjusted to enable the turnbuckle to be stretched or contracted simultaneously, the turnbuckle and the plane template are connected into a whole through the internal thread pipe and the hinged support, the plane template is driven to rotate, and the plane template is kept vertical.
Preferably, the method comprises the following steps: in the fifth step, the lifting ring screw comprises a lifting ring and a screw rod, and the lifting ring is arranged on the upper part of the screw rod.
The irrigation channel prefabrication assembly and cast-in-place concrete coping is obtained by construction according to the construction method of the irrigation channel prefabrication assembly and cast-in-place concrete coping.
The invention has the beneficial effects that:
(1) the device adopts the U-shaped groove rapid excavation device, the soil loosening device can loosen the soil layer of the pre-excavated groove, the U-shaped bucket is matched to easily excavate the groove foundation pit, the soil excavation and soil cutting capability is enhanced, the groove can be formed at one time under the construction condition of hard soil frozen soil, the slope surface is smooth and flat, the slope top is straight and beautiful, and manual trimming is not needed.
(2) The prefabricated U-shaped groove can be produced in a flow line, and the production efficiency is high. Meanwhile, compared with a cast-in-place concrete channel, the construction method reduces the workload of site construction and shortens the construction period.
(3) According to the invention, the polytetrafluoroethylene coating is sprayed on the upper part of the cushion layer, so that the friction between the prefabricated U-shaped groove and the concrete cushion layer is reduced, the prefabricated U-shaped groove can be moved on the cushion layer by a jack to complete assembly, the requirement on hoisting accuracy is reduced, and the construction difficulty is reduced.
(4) According to the invention, the connecting seams of the prefabricated U-shaped grooves are mutually folded and extruded, the soft column in the circular groove at one end of the prefabricated U-shaped groove is pressed into the circular groove of the other prefabricated U-shaped groove unit, so that the outer wall of the soft column is soft and extruded to coat the inner wall of the circular groove, the folded position of the prefabricated U-shaped groove has strong water-resisting property, the inclined edge of the folded position of the connecting seam forms a V-shaped groove structure, waterproof slurry can be conveniently filled, the strength is high after the waterproof slurry is solidified, the anti-pressure fracture property is strong, and the arrangement of the inner molecules is tight, so that the waterproof leakage effect is strong, the water permeation of the connecting seams of the prefabricated U-shaped grooves is effectively prevented, and the problem of the water permeation of the connecting seams of the prefabricated U-shaped grooves is solved.
(5) The invention adopts the irrigation channel coping and supporting system, forms the coping and supporting system by hinging the U-shaped mould and the adjustable support frame, has reasonable structure and convenient installation and construction, and solves the problem of how to connect the cast-in-place concrete coping side surface and the U-shaped channel side surface into a plane.
(6) In the cast-in-place concrete coping construction, the hoisting ring screws are embedded in the tops of the prefabricated U-shaped grooves, so that the problems that the traditional concrete coping and a concrete channel are weak in connection strength and easy to fall off during coping are solved.
Drawings
Fig. 1 is a schematic view of a U-shaped groove rapid excavation device for irrigation channel prefabrication assembly and cast-in-place concrete capping according to an embodiment of the invention.
Fig. 2 is a schematic view of a ripping apparatus in an irrigation canal prefabrication and assembly and cast-in-place concrete capping excavation apparatus according to an embodiment of the present invention.
Fig. 3 is a detailed view of a U-shaped bucket in an excavating device for prefabricating and assembling irrigation canals and coping cast-in-place concrete according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a U-shaped bucket in an excavating device for prefabricating, assembling and in-situ concrete topping of an irrigation channel according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a coping formwork system for prefabricated assembly of an irrigation channel and in-situ concrete coping according to an embodiment of the present invention.
Fig. 6 is a longitudinal connection diagram of unit U-shaped grooves for prefabricated assembly and cast-in-place concrete capping of an irrigation channel according to an embodiment of the present invention.
Fig. 7 is a schematic view of a waterproof structure of a unit U-shaped groove connecting joint for prefabricated assembly and cast-in-place concrete coping of an irrigation channel according to an embodiment of the invention.
Fig. 8 is an enlarged schematic cross-sectional view of a soft column in a waterproof structure of a unit U-shaped groove joint for prefabricated assembly and in-situ concrete capping of an irrigation channel according to an embodiment of the invention.
Fig. 9 is a schematic diagram of the connection of U-shaped molds in a coping formwork system of irrigation channel prefabrication assembly and cast-in-place concrete coping according to an embodiment of the invention.
Fig. 10 is a schematic view of an adjustable brace in a capping formwork system for prefabricated assembly and cast-in-place concrete capping of an irrigation channel according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of the connection between a prefabricated U-shaped groove and a cast-in-place concrete coping in a coping formwork system for irrigation channel prefabrication assembly and cast-in-place concrete coping according to an embodiment of the invention.
Fig. 12 is a construction flow chart of the irrigation canal prefabrication and assembly and cast-in-place concrete capping according to an embodiment of the invention.
Description of reference numerals: 1-digging machine; 2-a soil loosening device; 3-a power system; 4-protection plate; 5-a depth adjustment mechanism; 6-a transmission shaft; 7-loosening shovel blade; 8-U-shaped bucket; 9-ear plate; 10-a through hole; 11-keyhole; 12-limiting scraping plate; 13-bucket teeth; 14-a bolt; 15-a top plate; 16-a base plate; 17-a cushion layer; 18-soil mass; 19-a polytetrafluoroethylene coating; 20-grouting pipe; 21-voids; 22-prefabricating a U-shaped groove; 23-mortises; 24-a tenon; 25-beveled edge; 26-circular groove; 27-soft columns; 28-round inner cavity; 29-soft insert column; 30-lifting ring screws; 31-concrete topping; 32-plane template; 33-hinge; 34-a U-shaped template; 35-an adjustable support frame; 36-a lifting ring; 37-screw; 38-mounting holes; 39-sheets; 40-a rotating shaft; 41-hinged support; 42-a rotating handle; 43-turnbuckle; 44-an internally threaded tube; 45-waterproof slurry.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As an embodiment, the invention provides a construction method for prefabricating and assembling an irrigation channel and pressing a top by cast-in-place concrete, which comprises the following steps,
1) fast excavation of a U-shaped groove:
as shown in fig. 1-4, excavation is performed using the excavator 1 at the design position. During excavation, the scarifier 2 arranged at the front end of the chassis of the excavator 1 is firstly utilized to scarify the pre-excavated trench soil, and then the U-shaped bucket 8 is matched to easily excavate a U-shaped groove foundation pit, so that the linear smoothness of the radian is ensured.
U-shaped bucket 8 includes otic placode 9, through-hole 10, keyhole 11, spacing screed plate 12, bucket tooth 13, bolt 14, roof 15 and bottom plate 16, corresponds on spacing screed plate 12 and the roof 15 and sets up keyhole 11 and link to each other through bolt 14, and bottom plate 16 sets up bucket tooth 13, and roof 15 upper portion sets up otic placode 9, and otic placode 9 is equipped with through-hole 10.
The soil loosening device 2 comprises a power system 3, a protection plate 4, a depth adjusting mechanism 5, a transmission shaft 6 and a soil loosening shovel 7, one end of the depth adjusting mechanism 5 is connected with the power system 3 and fixed at the front end of a chassis of the excavator 1, the other end of the depth adjusting mechanism 5 is connected with the transmission shaft 6, the protection plate 4 is arranged on the depth adjusting mechanism 5, and the soil loosening shovel 7 is arranged on the transmission shaft 6.
2) Cushion layer construction:
as shown in figure 5, a cushion layer 17 is arranged on the compacted U-shaped groove bottom, the cushion layer 17 is paved among soil bodies 18 by adopting concrete, and a polytetrafluoroethylene coating 19 is sprayed on the upper part of the cushion layer 17.
3) Prefabricating and assembling a U-shaped groove:
as shown in FIG. 6, mortises 23 and tenons 24 are respectively arranged at the longitudinal ends of the prefabricated U-shaped groove 22 unit. Meanwhile, grouting pipes 20 are embedded at the two transverse ends of the prefabricated U-shaped groove 22 unit. And after the prefabricated U-shaped groove 22 unit is prefabricated, transporting the prefabricated U-shaped groove to a construction site. Firstly, a crane is used for hoisting the prefabricated U-shaped groove 22 unit to the concrete cushion layer 17, and then a jack is used for pushing the prefabricated U-shaped groove 22 unit to move on the polytetrafluoroethylene coating 19 until the prefabricated U-shaped groove 22 unit is successfully spliced with the previous prefabricated U-shaped groove 22 unit through the mortise 23 and the tenon 24. After the prefabricated U-shaped groove 22 is completely spliced, cement slurry is injected into the grouting pipe 20 to fill the gap 21 between the prefabricated U-shaped groove 22 and the soil body 18 around the outer wall of the groove, so that the bonding property between the prefabricated U-shaped groove 22 and the soil body 18 is enhanced.
4) Waterproof treatment of connecting seams:
as shown in FIGS. 7-8, the two longitudinal ends of the unit of the prefabricated U-shaped groove 22 are provided with round grooves 26, the two longitudinal ends of the unit of the prefabricated U-shaped groove 22 are also provided with bevel edges 25, the inner wall of the round groove 26 at one end of the unit of the prefabricated U-shaped groove 22 is provided with soft columns 27, and the soft columns 27 are made of neoprene. After the prefabricated U-shaped groove 22 is spliced, the soft column 27 in the circular groove 26 at one end of the prefabricated U-shaped groove 22 is pressed into the circular groove 26 of the adjacent prefabricated U-shaped groove 22, so that the outer wall of the soft column 27 is soft and extrudes to coat the inner wall of the circular groove 26, and the connecting position of the prefabricated U-shaped groove 22 has strong water resistance. The hypotenuse 25 at prefabricated U type groove 22 connection position forms a V type groove column structure, fills waterproof thick liquid 45, and waterproof thick liquid 45 solidifies the back intensity high, and the resistance to pressure absolutely is strong, and interior molecule arranges closely, therefore has very strong waterproof seepage's effect, and then prevents effectively that prefabricated U type groove 22 joint gap from permeating water.
Be equipped with circle inner chamber 28 in the soft post 27, insert soft post 29 of inserting in the circle inner chamber 28, the soft material of inserting post 29 is silica gel, and 27 textures of soft post are softer relatively, for the soft support of 27 insides of soft post, can not appear the cavity during the soft post 27 compression deformation for the inner wall of the circular slot 26 of laminating completely of soft post 27.
5) And (3) pressing the cast-in-place concrete:
as shown in fig. 5 and 9-11, firstly, a formwork is supported on the inner side of the prefabricated U-shaped groove 22, a top pressing formwork supporting system is built by utilizing a plane formwork 32 and a U-shaped formwork 34, the plane formwork 32 and the U-shaped formwork 34 can rotate relatively through a hinge 33, the plane formwork 32 is hinged with an adjustable support frame 35, a rotary handle 42 of the adjustable support frame 35 is adjusted, the plane formwork 32 is controlled to be vertical through the stretching of a turnbuckle 43, a hanging ring screw 30 is embedded in the top of the prefabricated U-shaped groove 22, finally, a concrete top pressing 31 is cast in situ on the top of the prefabricated U-shaped groove 22, vibration and maintenance are carried out, and the construction of the concrete top pressing 31 is completed.
The hinge 33 includes a mounting hole 38, a leaf 39 and a rotating shaft 40. The flat formwork 32 and the U-shaped formwork 34 are connected with the leaf 39 through the mounting hole 38 and can rotate freely, and the flat formwork 32 is slightly higher than the ground surface.
The adjustable bracket 35 comprises a hinged support 41, a rotary handle 42, a turnbuckle 43 and an internal threaded pipe 44. The turnhandle 42 is adjusted to enable the turnbuckle 43 to be stretched or contracted simultaneously, the turnbuckle 43 and the plane template 32 are connected into a whole through the internal thread pipe 44 and the hinged support 41, the plane template 32 is driven to rotate, the plane template 32 is kept vertical, and finally the purpose of keeping the top side of cast-in-place concrete vertical is achieved.
The lifting ring screw 30 comprises a lifting ring 36 and a screw rod 37, and the lifting ring 36 is arranged at the upper part of the screw rod 37. The lifting ring screw 30 not only can increase the connection strength with the cast-in-place concrete roof through the screw rod 37, but also can be used as a lifting lug by utilizing the lifting ring 36, and is easy to hoist.
Claims (7)
1. The construction method for the prefabrication and assembly of the irrigation channel and the coping of the cast-in-place concrete is characterized by comprising the following steps of:
firstly, rapidly excavating a U-shaped groove:
excavating at the designed position by using an excavator (1); during excavation, firstly loosening pre-excavated trench soil by using a loosening device (2) arranged at the front end of a chassis of an excavator (1), and then easily excavating a U-shaped groove foundation pit by matching with a U-shaped bucket (8);
step two, cushion layer construction:
setting a cushion layer (17) after the U-shaped groove bottom is compacted, paving the cushion layer (17) among soil bodies (18) by adopting concrete, and spraying a polytetrafluoroethylene coating (19) on the upper part of the cushion layer (17);
step three, prefabricating and assembling a U-shaped groove:
mortises (23) and tenons (24) are respectively arranged at the two longitudinal ends of the prefabricated U-shaped groove unit; meanwhile, grouting pipes (20) are embedded at the two transverse ends of the prefabricated U-shaped groove unit; after the prefabricated U-shaped groove units are prefabricated, transporting the prefabricated U-shaped groove units to a construction site; firstly, hoisting a prefabricated U-shaped groove unit to a concrete cushion layer (17) by using a crane, and then pushing the prefabricated U-shaped groove unit to move on a polytetrafluoroethylene coating (19) by using a jack until the prefabricated U-shaped groove unit is successfully spliced with the previous prefabricated U-shaped groove unit through a mortise (23) and a tenon (24); after the prefabricated U-shaped groove (22) is completely spliced, cement slurry is injected into the grouting pipe (20) to fill a gap (21) between the prefabricated U-shaped groove (22) and the soil body (18) around the outer wall of the groove;
step four, waterproof treatment of connecting seams:
round grooves (26) are arranged at the two longitudinal ends of the prefabricated U-shaped groove unit, bevel edges (25) are also arranged at the two longitudinal ends of the prefabricated U-shaped groove unit, a soft column (27) is arranged on the inner wall of the round groove (26) at one end of the prefabricated U-shaped groove unit, and the soft column (27) is made of chloroprene rubber; after the prefabricated U-shaped groove (22) is spliced, pressing a soft column (27) in a circular groove (26) at one end of a prefabricated U-shaped groove unit into the circular groove (26) of an adjacent prefabricated U-shaped groove unit, and enabling the outer wall of the soft column (27) to be in soft extrusion coating with the inner wall of the circular groove (26); the bevel edge (25) of the connecting part of the prefabricated U-shaped groove (22) forms a V-shaped groove structure, and waterproof slurry (45) is filled in the V-shaped groove structure;
step five, pressing the cast-in-place concrete:
firstly, a formwork is erected on the inner side of a prefabricated U-shaped groove (22), a jacking formwork system is erected by utilizing a plane formwork (32) and a U-shaped formwork (34), the plane formwork (32) and the U-shaped formwork (34) rotate relatively through a hinge (33), the plane formwork (32) is hinged with an adjustable support frame (35), a rotary handle (42) of the adjustable support frame (35) is adjusted, the plane formwork (32) is controlled to be vertical through stretching or shrinking of a turnbuckle (43), a lifting ring screw (30) is pre-embedded at the top of the prefabricated U-shaped groove (22), finally, a concrete jacking (31) is cast at the top of the prefabricated U-shaped groove (22), vibration and maintenance are carried out, and construction of the concrete jacking (31) is completed.
2. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the first step, the U-shaped bucket (8) comprises an ear plate (9), a through hole (10), a bolt hole (11), a limiting scraping plate (12), bucket teeth (13), a bolt (14), a top plate (15) and a bottom plate (16), the bolt hole (11) is correspondingly formed in the limiting scraping plate (12) and the top plate (15) and connected through the bolt (14), the bucket teeth (13) are arranged on the bottom plate (16), the ear plate (9) is arranged on the upper portion of the top plate (15), and the through hole (10) is formed in the ear plate (9).
3. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the first step, the soil loosening device (2) comprises a power system (3), a protection plate (4), a depth adjusting mechanism (5), a transmission shaft (6) and a soil loosening shovel (7), one end of the depth adjusting mechanism (5) is connected with the power system (3) and fixed at the front end of a chassis of the excavator (1), the other end of the depth adjusting mechanism (5) is connected with the transmission shaft (6), the protection plate (4) is arranged on the depth adjusting mechanism (5), and the soil loosening shovel (7) is arranged on the transmission shaft (6).
4. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the fourth step, a round inner cavity (28) is arranged in the soft column (27), a soft insert column (29) is inserted into the round inner cavity (28), and the soft insert column (29) is made of silica gel.
5. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the fifth step, the hinge (33) comprises a mounting hole (38), a leaf (39) and a rotating shaft (40); the plane template (32) and the U-shaped template (34) are connected with the leaf (39) through the mounting hole (38), and the plane template (32) is higher than the ground surface.
6. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the fifth step, the adjustable support frame (35) comprises a hinged support (41), a rotary handle (42), a turnbuckle (43) and an internal threaded pipe (44); the turnhandle (42) is adjusted to enable the turnbuckle (43) to be stretched or contracted simultaneously, the turnbuckle (43) and the plane template (32) are connected into a whole through the internal thread pipe (44) and the hinged support (41), and the plane template (32) is driven to rotate, so that the plane template (32) is kept vertical.
7. The construction method for prefabricating and assembling the irrigation channel and pressing the top of the cast-in-place concrete according to claim 1, wherein the construction method comprises the following steps: in the fifth step, the lifting ring screw (30) comprises a lifting ring (36) and a screw rod (37), and the lifting ring (36) is arranged on the upper part of the screw rod (37).
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| CN114922138B (en) * | 2022-05-20 | 2024-01-26 | 四川水发建设有限公司 | Concrete lining device for small-section thin-wall U-shaped open channel and construction method thereof |
| CN119980963B (en) * | 2025-03-25 | 2025-10-03 | 长江生态环保集团有限公司 | Cast-in-situ mixed quick construction method for water delivery channel assembly |
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