WO2009156818A1

WO2009156818A1 - Prefabricated foundation element for building walls

Info

Publication number: WO2009156818A1
Application number: PCT/IB2009/006011
Authority: WO
Inventors: Emilio Brovelli
Original assignee: Geotech Lizenz Ag
Priority date: 2008-06-27
Filing date: 2009-06-22
Publication date: 2009-12-30
Also published as: ITMO20080183A1

Abstract

The prefabricated foundation element for building walls using filling material, particularly earth or the like, comprises a structure having a first and a second longitudinal beam resting on the ground, that are substantially parallel with each other and associated with each other by means of a first and a second connection section which are substantially crossways to the longitudinal beams and are suitable for supporting, respectively, a first and a second support foot of a construction element for building walls using filling material, the extremities of the longitudinal beams extending beyond the connection sections to define a first open compartment obtained among the beam extremities and the first connection section, a second open compartment obtained among the beam extremities and the second connection section, and a third closed compartment obtained among the longitudinal beams and the connection sections, with the longitudinal beams and connection sections being associable rebars suitable for being positioned in a work configuration in which they extend inside the compartments.

Description

PREFABRICATED FOUNDATION ELEMENT FOR BUILDING WALLS

Technical Field The present invention relates to a prefabricated foundation element for building walls or barriers to reduce noise with filling consisting of filling material, particularly earth or the like. Background art To make these particular masonry works such as, e.g., the retaining walls or slopes and gradients at the sides of roads, motorways, railways or the like, or the walls for creating level differences between different urban areas or barriers to reduce noise, the use is known of prefabricated building elements. Such elements usually consist of large-size trussed structures made from reinforced-concrete castings and which, during wall construction, are arranged one on top of the other to form a vertical or oblique pile, and then covered with filling material such as earth, sand, gravel, etc.

The resulting wall has considerable stability and resistance, but this can however be further increased by means of the use of particular retention systems that allow joining the construction elements the one to the other, or anchoring them to the filling material and/or directly to the slope to be held back.

A particular type of construction element consists in the combination of a pair of substantially horizontal longitudinal members, and a pair of supporting feet, which join together the longitudinal beams and define the supporting bases of the construction element, allowing this to rest on the ground or on another construction element underneath.

The longitudinal members are fitted at the top of the supporting feet and, in assembly configuration, are arranged parallel to the positioning plane of the wall to be built, with one of them facing the outside while the other is arranged on the inside of the wall. These construction elements are prefabricated in specific facilities equipped with equipment for their formation in a practical easy and functional way. Once fabricated, they are subsequently transferred to the place where the wall has to be built and rapid installation operations are begun. To build walls made this way, it is usually necessary for the base of the construction elements to rest on a sufficiently sturdy and strong foundation, able to support the weight of the entire wall without sinking into the ground underneath, as well as to withstand the overturning and/or dragging-translation pressure of the barrier.

For this purpose, preventive foundation works are generally carried out in an extemporaneous way directly on the worksite, just before the construction elements are positioned. Generally speaking, these foundation works consist in excavating a trench, sometimes also with oblique section, in preparing a series of formwork boarding, made of wood or other material, on the site where the wall is to be erected, in installing adequate iron reinforcements and in filling the formwork with a casting of fresh concrete, to form a solid floor of pre-established dimensions and shape, able to support the wall.

These foundations of traditional type have a number of drawbacks, including the fact that they require a particularly long time to make and must be fabricated directly on the worksite, not always in optimum conditions, both in terms of lack of room to manoeuvre, not very practical use, and in terms of lack of safety for the operators appointed to erect the wall.

Another drawback of traditional foundations consists in the fact that at least a few weeks must pass before they are able to withstand loads and traction, thrust or compression forces, which considerably extends the total time needed to erect the wall. A further drawback of traditional foundations consists in the fact that to erect substantially oblique walls, the installed foundation must have a substantially wedge shape, which considerably complicates either the excavation work and reinforced concrete laying or the shape of the formwork boarding and the entire foundation work. To overcome such drawbacks, prefabricated foundation elements have been conceived, i.e., fabricated in the same facilities in which the construction elements are made. These foundation elements have a more or less large base resting on the ground intended to distribute the weight of the entire wall in the most uniform way possible and are designed according to the geo-technical requirements of the wall itself. These foundation elements are also susceptible however to further upgrading aimed at improving their operating efficiency and practicality of use for their installation and for the erection of the entire wall. Object of the Invention The main aim of the present invention is to provide a prefabricated foundation element for building walls using filling material, particularly earth or the like, that can be fabricated in a practical, easy and functional way, quickly and with relatively low production costs, and at the same time can be stored and transported relatively easily and in a very inexpensive way, as well as laid on a flat surface even in the case of the need to obtain angled walls or barriers. Another object of the present invention is to provide a prefabricated foundation element for building walls using filling material, particularly earth or the like, which permits simplifying the entire wall-building operation and in particular makes easier the installation of the foundations and their connection to the construction elements. A further object of the present invention is to provide a prefabricated foundation element for building walls using filling material, particularly earth or the like, which permits overcoming the mentioned drawbacks of the background art in the ambit of a simple, rational, easy, effective to use and low cost solution. The above objects are achieved by the present prefabricated foundation element for building walls using filling material, particularly earth or the like, characterized in that it comprises at least a structure having at least a first and a second longitudinal beam resting on the ground, that are substantially parallel with each other and associated with each other by means of at least a first and a second connection section which are substantially crossways to said longitudinal beams and are suitable for supporting, respectively, a first and a second foot for supporting at least a construction element for building walls using filling material, the extremities of said longitudinal beams extending beyond said connection sections to define a first open compartment obtained among said extremities and said first connection section, a second open compartment obtained among said extremities and said second connection section, and a third closed compartment obtained among said longitudinal beams and said connection sections, with at least one among said longitudinal beams and said connection sections being associable at least one rebar suitable for being positioned in a work configuration in which it extends inside at least one among said first, said second and said third compartment.

Brief Description of the Drawings Other characteristics and advantages of the present invention will become more evident from the description of some preferred, but not sole, embodiments of a prefabricated foundation element for building walls using filling material, particularly earth or the like, illustrated purely as an example but not limited to the annexed drawings in which: figure 1 is an axonometric view of a first embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 2 is a side view of the elements of figure 1; figure 3 is a plan view of the foundation element of figure 1; figure 4 is a section view along the track plane IV - IV of figure 3; figure 5 is a section view of a second embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 6 is a section view of a third embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 7 is a section view of two foundation elements of figure 6 coupled together; figure 8 is a section view of a fourth embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 9 is a section view of a fifth embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 10 is a section view of a sixth embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 11 is a section view of the elements of figure 10; figure 12 is a section view of a seventh embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 13 is a section view of the elements of figure 12; figure 14 is a section view of an eighth embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 15 is a section view of a ninth embodiment of the foundation element according to the invention coupled with a construction element for building walls; figure 16 is a broken view which shows some rebars and a containment box provided in the foundation elements according to the invention; figure 17 is an axonometric view of the foundation element of figure 1 during installation; figure 18 is an axonometric, schematic and partial view of another embodiment of the foundation element according to the invention during installation; figure 19 is an axonometric, schematic and partial view of the foundation element of figure 18 during a different type of installation; figure 20 is an axonometric and exploded view of an alternative embodiment of the foundation element according to the invention; figure 21 is a side view of the foundation element of figure 20; figure 22 is a plan view of the foundation element of figure 20; figure 23 is an axonometric and exploded view of a further embodiment of the foundation element according to the invention.

Embodiments of the Invention

With particular reference to such figures, by 1 is globally indicated a prefabricated foundation element for building walls using filling material, particularly earth or the like.

The element 1, in particular, is intended to act as a foundation base and to support construction elements 2 which, in the particular embodiments shown in the illustrations, comprise two longitudinal members 3, 4 associated with each other by means of a first connection and support foot 5 and a second connection and support foot 6.

It cannot however be ruled out that the element 1 according to the invention be used to support construction elements 2 of different shapes. The element 1 , in detail, consists of a reinforced concrete structure having a first longitudinal beam 7 and a second longitudinal beam 8 ready for resting on the ground and, in particular, for the installation in a trench excavation with horizontal flat bottom.

For this purpose the longitudinal beams 7, 8 have a substantially flat lower surface and are arranged substantially parallel on a horizontal plane.

The longitudinal beams 7, 8 shown in the illustrations are substantially identical in terms of shape and dimensions but the fact cannot be ruled out, for example, that one of the two be fabricated wider than the other.

The longitudinal beams 7, 8 are furthermore associated the one with the other by means of a first connection section 9 and of a second connection section 10 which extend transversally, in particular at right angles, to the longitudinal beams 7, 8 and are suitable for supporting, respectively, the first foot 5 and the second foot 6 of the construction element 2.

In the embodiment of the invention shown in the figures from 1 to 4, each connection section 9, 10 comprises a corresponding foundation slab 9a, 10a that extends between the longitudinal beams 7, 8 and is arranged at the supporting base of the structure 1, defining a part of this.

In this respect, it must be specified that in this pamphlet by the term supporting base of the structure 1 is meant the surface on which the structure 1 rests and discharges its weight on the ground in the position of normal use, i.e., that of installation in a trench excavation with flat horizontal bottom.

In the embodiment of the invention shown in the figures from 1 to 4 therefore, the supporting base of the structure 1 is defined by the lower surfaces of the longitudinal beams 7, 8 and of the foundation slabs 9a, 10a. The connection sections 9, 10, furthermore, also comprise a wall 9b, 10b, or tooth, which extends substantially vertically between the longitudinal beams 7, 8 above each foundation slab 9a, 10a.

Each wall 9b, 10b has a supporting surface 9c, 10c intended to support the feet 5, 6 of the construction element 2 and which is arranged at a substantially greater height than that of the longitudinal beams 7, 8. In this respect, it must be explained that in the present pamphlet by the term height shall be deemed the distance which is evaluated with respect to the supporting base of the structure 1 and which, once the element 1 has been placed in the horizontal installation configuration, corresponds to the height off the ground. At the supporting surfaces 9c, 10c each wall 9b, 10b has coupling means 11, 12, 13 for fastening to the feet 5, 6.

The coupling means 11, 12, 13, for example, consist in a series of first holes 11 obtained on the supporting surfaces 9c, 10c and in which can be fitted a corresponding lock pin 12 which in turn can be coupled with a series of second holes 13 obtained on the feet 5, 6. Both the first holes 11 and the second holes 13 are obtained so that in the installation configuration, these are substantially vertical so as to facilitate their coupling with the lock pin 12 and the positioning of the construction element 2 above the structure 1. It cannot however be ruled out that the first holes 11 and the second holes 13 be obtained substantially at right angles to the supporting surfaces 9c, 10c.

Usefully, in the embodiment of the invention shown in the figures from 1 to 4, the supporting surfaces 9c, 10c are substantially oblique with respect to the supporting base of the element 1 and are substantially flattened, in the sense that they do not change in inclination along their entire extension. Alternative embodiments are however possible in which the supporting surfaces 9c, 10c are of different shape. In the embodiment shown in figure 5, for example, the supporting surfaces 9c, 10c have a protuberance 14 for coupling with a corresponding opening 15 obtained on the feet 5, 6, which permits providing greater adherence between the construction element 2 and the structure 1 during installation. Of course, the same result can be obtained in the event of the supporting surfaces 9c, 10c comprising an opening for coupling with a protuberance protruding from the feet 5, 6.

In the embodiment shown in the figures 6 and 7, on the other hand, the supporting surfaces 9c, 10c of the walls 9b₅ 10b have both a protuberance 14 identical to that of figure 5, and a lightening recess 16 which is suitable for fitting the protuberance 14 of an identical supplementary foundation element 17 that can be placed above the structure 1.

Usefully, the protuberance 14 and the lightening recess 16 are arranged at the extremities of the supporting surfaces 9c, 10c in a substantially equidistant position with respect to a vertical, longitudinal and substantially median plane (shown in the figures 6 and 7 by the outline 18), so that the element 1 and the identical supplementary foundation element 17 can be easily superimposed, making the respective supporting surfaces 9c, 10c coincide (figure 7). As can be easily appreciated, this particular geometry of the elements 1, 17 allows storing and transporting the elements 1, 17 before their installation with particularly small overall dimensions, superimposing them two by two and creating a flat-based monolith for the subsequent superimposed loads. In the embodiment shown in figure 8, the element 1 has a protuberance 14 and a lightening recess 16 similar to those of the previous embodiment, with the only difference that they are not placed at the extremities of the supporting surfaces 9c, 10c, but remain substantially equidistant from the vertical, longitudinal and substantially median plane 18.

In all the additional embodiments shown in the figures from 5 to 8, the supporting surfaces 9c, 10c are substantially oblique and, in the same way as the embodiment of the figures from 1 to 4, are intended for building sloped retaining walls.

In the embodiment shown in the figure 9, on the other hand, the supporting surfaces 9c, 10c are substantially horizontal and allow resting the construction elements 2 on them to build a substantially vertical wall.

In an alternative embodiment of the invention shown in the figures 10 and H₅ the element 1 is substantially identical to that of the figures from 1 to 4, with the only difference that the connection sections 9, 10 are without the foundation slabs 9a, 10a and are composed only of the walls 9b, 10b, which extend between the longitudinal beams 7, 8 and keep these together.

The walls 9b, 10b, in detail, come into contact with the longitudinal beams 7, 8 only at the upper part of the beams themselves and do not reach the supporting base of the element 1. In the embodiment of the figures 10 and 11, therefore, the supporting base of the element 1 is composed only of the lower surfaces of the longitudinal beams

7, 8.

Another embodiment of the present invention is shown in the figures 12 and 13 and is substantially the same as the solution of the figures from 1 to 4, being different from this inasmuch as the connection sections 9, 10 are without the walls 9b, 10b and are composed only of the foundation slabs 9a, 10a.

In this embodiment, inside the foundation slabs 9a, 10a are obtained two corresponding niches 9d, 1Od for fitting the feet 5, 6 of the construction element

2. Each niche 9d, 1Od has a supporting bottom 19 for the corresponding foot 5, 6, which extends for a length substantially equal to the length of the feet 5, 6 and which is substantially oblique for building sloped walls.

Alternative embodiments cannot however be ruled out in which the supporting bottom 19 is substantially horizontal to support a straight construction element 2, like that shown in figure 14 for building substantially vertical walls, or for resting an oblique construction element 2, like that shown in figure 15 for building substantially sloped walls.

Advantageously, in all the previously shown embodiments, the extremities of the longitudinal beams 7, 8 extend beyond the connection sections 9, 10. By this is meant that the connection sections 9, 10 are not exactly joined at the extremities of the longitudinal beams 7, 8 but, on the contrary, the joining point of the connection sections 9, 10 to the longitudinal beams 7, 8 is substantially distanced with respect to the above extremities.

This particular arrangement of the longitudinal beams 7, 8 and of the connection sections 9, 10 results in the following being defined in the structure 1:

- a first open compartment 20, which is obtained at an end part of the element 1 among two extremities of the longitudinal beams 7, 8 and the first connection section 9;

- a second open compartment 21, which is obtained at the end part of the element 1 opposite the first compartment 20, among two extremities of the longitudinal beams 7, 8 and the second connection section 10; - a third closed compartment 22, which is obtained among the longitudinal beams 7, 8 and the connection sections 9, 10.

In this respect, it must be pointed out that in the present pamphlet, the third compartment 22 is defined as "closed" inasmuch as it is circumscribed inside a rectangular frame, the four sides of which consist in the connection sections 9, 10 and in the median parts of the longitudinal beams 7, 8.

The first compartment 20 and the second compartment 21, on the other hand, are defined as "open" being delimited only on three sides. The first, the second and the third compartment 20, 21, 22 are schematically shown in figure 3 by means of the broken line. Usefully, on the faces of the longitudinal beams 7, 8 and/or of the foundation slabs 9a, 10a facing the three compartments 20, 21, 22 is associable a plurality of rebars 23 a, 23b suitable for being positioned in a work configuration in which they extend substantially horizontal and overhanging inside the compartments 20, 21, 22. The rebars 23a, 23b, in particular, are fitted inside containment boxes 24, of the STABOX® type or the like, at least partially drowned in the structure 1. More in detail, during the fabrication phase of the element 1 an extremal part 23a of the rebars 23a, 23b is drowned in the concrete casting together with the containment boxes 24, while the opposite extremal part 23b of the rebars 23a, 23b is fitted in a configuration bent inside the containment boxes 24.

The containment boxes 24 have a cover 25 facing onto the outside of the structure 1 so that, before installation, it can be removed to make accessible from the outside the extremal parts 23b of the rebars 23 a, 23b and allow bending these, bringing them into the work configuration (figure 16). Advantageously, the rebars 23 a, 23b allow, if necessary, widening the supporting base of the element 1 by means of supplementary castings with fresh concrete 26 to fill one or more of the compartments 20, 21, 22 in the installation configuration.

The supporting base of the element 1 according to the invention, therefore, is a "progressive" contact surface or, in other words, it is designed so as to satisfy the load/capacity requirements related to the predefined project surface but which at the same time can be increased on the worksite, according to the strength characteristics of the ground, gradually increasing its load capacity thanks to the correlated increase of the ground contact surface obtained by means of the supplementary concrete castings 26. The supplementary castings are inexpensively made because the structure 1 already by itself provides an outer prefabricated frame that acts as a disposable formwork boarding for the final widened foundation.

More in detail, thanks to its geometry, the element 1 allows making a supplementary casting directly inside the compartments 20, 21, 22, increasing the total load to be sustained in a way almost proportionate to the multiplication of the unitary surface in contact with the ground and only for the requested quantity.

In this respect, it must be pointed out that, to represent the installation phase of the present invention, figure 17 shows, merely by way of example, the element 1 shown in the figures from 1 to 4, but identical considerations can also be made for all the embodiments shown in the other illustrations.

In the solution shown in figure 17, all three compartments 20, 21, 22 are intended to be filled with the supplementary concrete castings 26. For this purpose, it must be noted that, while in the third compartment 22 the concrete 26 can be poured just as soon as the element 1 has been positioned in the installation configuration, in the first compartment 20 and in the second compartment 21, the concrete 26 is poured only after fitting an additional containment formwork boarding 27 at the extremities of the longitudinal beams 7, 8.

Other building solutions are however possible in which only one of the compartments 20, 21, 22 is filled with the concrete 26, or in which the concrete

26 is not poured into any of them. In another embodiment of the invention, shown in the figures 18 and 19, the extremities of the longitudinal beams 7, 8 have additional rebars 28 which extend at least partially along a longitudinal direction, meaning parallel to the longitudinal beams 7, 8, and which are intended to allow joining to an adjacent foundation element 1. As shown in figure 18, for example, during the installation, the foundation elements 1 can be joined together to provide the end foundation with greater stability and strength.

For this purpose, the extremities of the longitudinal beams 7, 8 are positioned next to one another and joined by means of a supplementary concrete casting 26, which is enclosed in specific additional containment formwork boarding 27 inside which the additional rebars 28 are drowned.

In the solution of figure 18, furthermore, none of the compartments 20, 21, 22 is filled with supplementary castings but, depending on the strength characteristics of the ground, it is possible that one or more of them are, as shown in figure 19. In an alternative embodiment shown in the figures from 20 to 22, the foundation element according to the invention is not made up only of the structure 1 defined by the longitudinal beams 7, 8 and by the connection sections 9, 10, but also of an auxiliary structure 29.

This auxiliary structure has a third longitudinal beam 30 for resting on the ground and, more in detail, for the installation in the trench excavation along a direction parallel with the first and the second longitudinal beam 7, 8.

For this purpose, the third longitudinal beam 30, similarly to the first and the second longitudinal beam 7, 8, has a substantially flat lower surface.

Furthermore, the auxiliary structure 29 comprises a first connection arm 31 and a second connection arm 32 which extend from the third longitudinal beam 30 substantially crossways, in particular at right angles.

The connection arms 31, 32 are associable with the second longitudinal beam 8 and cooperate with the structure 1 to support at least partially the supporting feet

5, 6 of the construction elements 2.

In other words, by means of the auxiliary structure 29, the depth of the foundation can be widened during installation. The connection arms 31, 32 comprise a portion 33 of extremity which can be positioned substantially superimposed on the second longitudinal beam 8 and which is shaped substantially complementary to the profile of the second longitudinal beam 8.

At the portions 33, fastening means 34, 35 are provided which permit joining the connection arms 31 , 32 to the second longitudinal beam 8.

Such fastening means 34, 35 comprise a series of cavities 34 obtained on the second longitudinal beam 8 and on the portions 33 of the connection arms 31,

32, in installation configuration the cavities 34 being positionable substantially coinciding to allow fitting corresponding substantially vertical joining pins 35. The extremities of the third longitudinal beam 30 extend beyond the connection arms 31, 32 to define in installation configuration:

- a fourth open compartment 36, which is obtained at an end part of the auxiliary structure 29 among an extremity of the second longitudinal beam 8, an extremity of the third longitudinal beam 30 and the first connection arm 31;

- a fifth open compartment 37, which is obtained at the end part of the auxiliary structure 29 opposite the fourth compartment 36, among an extremity of the second longitudinal beam 8, an extremity of the third longitudinal beam 30 and the second connection arm 32; - a sixth closed compartment 38, which is obtained among the second longitudinal beam 8, the third longitudinal beam 30 and the connection arms 31, 32.

The fourth, the fifth and the sixth compartments 36, 37, 38 are schematically illustrated in figure 22 by a broken line. Usefully, on the faces of the third longitudinal beam 30 and/or of the connection arms 31, 32 facing onto the fourth, fifth and sixth compartments 36, 37, 38 is associable a plurality of auxiliary rebars 39a, 39b suitable for being positioned in a work configuration in which they extend substantially horizontal and overhanging inside the compartments themselves.

Similarly to the rebars 23 a, 23b, the auxiliary rebars 39a, 39b are fitted inside containment boxes 24, of the STABOX® type or the like. Similarly to what is shown in the figures from 17 to 19, therefore, the fourth, fifth and sixth compartments 36, 37, 38 can also be filled with fresh concrete in the installation configuration so as to widen, if necessary, the supporting base of the auxiliary structure 29.

In another embodiment shown in figure 23, finally, the auxiliary structure 29 is identical to that of the figures from 20 to 22 but differs in that it comprises a stiffening beam 40.

Such stiffening beam is suitable for connecting the extremities of the connection arms 31, 32 opposite to the third longitudinal beam 30 so as to provide greater strength both during transport and during the installation phase.

Claims

1) Prefabricated foundation element for building walls using filling material, particularly earth or the like, characterized in that it comprises at least a structure having at least a first and a second longitudinal beam resting on the ground, that are substantially parallel with each other and associated with each other by means of at least a first and a second connection section which are substantially crossways to said longitudinal beams and are suitable for supporting, respectively, a first and a second foot for supporting at least a construction element for building walls using filling material, the extremities of said longitudinal beams extending beyond said connection sections to define a first open compartment obtained among said extremities and said first connection section, a second open compartment obtained among said extremities and said second connection section, and a third closed compartment obtained among said longitudinal beams and said connection sections, with at least one among said longitudinal beams and said connection sections being associable at least one rebar suitable for being positioned in a work configuration in which it extends inside at least one among said first, said second and said third compartment.

2) Element according to claim 1, characterized in that at least one of said connection sections comprises at least a foundation slab that extends between said longitudinal beams and is arranged at the supporting base of said structure.

3) Element according to one or more of the preceding claims, characterized in that at least one of said connection sections comprises at least a wall which extends substantially vertically between said longitudinal beams and has a supporting surface for at least one of said feet and which is arranged at a substantially greater height than that of said longitudinal beams.

4) Element according to one or more of the preceding claims, characterized in that said wall is associated above said foundation slab.

5) Element according to one or more of the preceding claims, characterized in that said wall comprises coupling means for fastening to at least one of said feet.

6) Element according to one or more of the preceding claims, characterized in that said coupling means comprise at least one hole obtained on said supporting 11

16 surface and in which a corresponding lock pin can be fitted.

7) Element according to one or more of the preceding claims, characterized in that said supporting surface is substantially oblique.

8) Element according to one or more of the preceding claims, characterized in that said supporting surface is substantially horizontal.

9) Element according to one or more of the preceding claims, characterized in that said supporting surface is substantially flat.

10) Element according to one or more of the preceding claims, characterized in that said supporting surface comprises at least a protuberance for coupling with a corresponding opening obtained on said foot.

11) Element according to one or more of the preceding claims, characterized in that said supporting surface comprises at least an opening for coupling with at least a protuberance protruding from said foot.

12) Element according to one or more of the preceding claims, characterized in that said supporting surface comprises at least a lightening recess suitable for fitting the coupling protuberance of a supplementary foundation element that can be placed above said structure.

13) Element according to one or more of the preceding claims, characterized in that said supporting surface comprises both said coupling protuberance and said lightening recess arranged in a substantially equidistant position with respect to a vertical, longitudinal and substantially median plane.

14) Element according to one or more of the preceding claims, characterized in that at least one of said connection sections comprises at least a niche which is obtained in said foundation slab for fitting at least one of said feet and which has a supporting bottom of at least one of said feet.

15) Element according to one or more of the preceding claims, characterized in that the length of said niche is substantially equal to the length of at least one of said feet.

16) Element according to one or more of the preceding claims, characterized in that said supporting bottom is substantially oblique.

17) Element according to one or more of the preceding claims, characterized in that said supporting bottom is substantially horizontal. 009/006011

17

18) Element according to one or more of the preceding claims, characterized in that said rebar is associated with a containment box, at least partially drowned in at least one among said longitudinal beams and said connection sections.

19) Element according to one or more of the preceding claims, characterized in that said containment box is a STABOX®.

20) Element according to one or more of the preceding claims, characterized in that at least one of said extremities of the longitudinal beams has at least one additional rebar which extends at least partially along a longitudinal direction to join to an adjacent foundation element. 21) Element according to one or more of the preceding claims, characterized in that it comprises at least an auxiliary structure having at least a third longitudinal beam for resting on the ground, which can be placed substantially parallel with said second longitudinal beam, and at least a first connection arm and a second connection arm which extend substantially crossways from said third longitudinal beam, are associable with said second longitudinal beam and are suitable for supporting at least partially said supporting feet, the extremities of said third longitudinal beam extending among said connection arms to define a fourth open compartment, which is obtained among said second longitudinal beam, said third longitudinal beam and said first connection arm, a fifth open compartment, which is obtained among said second longitudinal beam, said third longitudinal beam and said second connection arm, and a sixth closed compartment, which is obtained among said second longitudinal beam, said third longitudinal beam and said connection arms.

22) Element according to one or more of the preceding claims, characterized in that it comprises at least one auxiliary rebar which is associable with at least one among said third longitudinal beam and said connection arms and is suitable for being positioned in a work configuration in which it extends inside at least one among said fourth, said fifth and said sixth compartment.

23) Element according to one or more of the preceding claims, characterized in that said connection arms comprise at least a portion which can be positioned substantially superimposed on said second longitudinal beam.

24) Element according to one or more of the preceding claims, characterized in that it comprises fastening means for joining said connection arms to said second longitudinal beam.

25) Element according to one or more of the preceding claims, characterized in that said fastening means comprise at least a series of cavities obtained on said second longitudinal beam and on said portion of the connection arms, in installation configuration said cavities being positionable substantially coinciding to allow fitting corresponding substantially vertical joining pins.

26) Element according to one or more of the preceding claims, characterized in that said auxiliary structure comprises at least one stiffening beam suitable for connecting the extremities of said connection arms opposite to said third longitudinal beam.

27) Element according to one or more of the preceding claims, characterized in that at least one of said compartments can be filled with a supplementary concrete casting in the installation configuration to define a foundation with widened supporting base.