CN213014296U - Pier stud bearing platform foundation - Google Patents

Abstract

The utility model discloses a pier stud cushion cap basis, pier stud cushion cap basis includes: excavation supporting and pour the concrete structure in excavation supporting, wherein, excavation supporting includes a plurality of sheet piles, a plurality of sheet piles are end to end along circumference, every sheet pile includes first sheet pile section and two second sheet pile sections, two second sheet pile sections are connected respectively at the both ends of first sheet pile section, two second sheet pile sections all lie in same one side of first sheet pile section, and along the direction of keeping away from first sheet pile section towards, distance between two second sheet pile sections is crescent, two second sheet pile sections all have towards deviate from each other and to the portion of bending of first sheet pile section, through the portion of bending reverse connection between two adjacent sheet piles. According to the utility model discloses a pier stud cushion cap basis is through the distance crescent with between two second sheet pile sections, can reduce the number of sheet pile in the excavation supporting. Two adjacent sheet piles are reversely connected through the bending part, and the stability of connecting the two adjacent sheet piles is effectively guaranteed.

Description

Pier stud bearing platform foundation

Technical Field

The utility model belongs to the technical field of the track traffic and specifically relates to a pier stud cushion cap basis is related to.

Background

In the related art, the pier foundation generally adopts the following two modes: firstly, the pile foundation is directly constructed under the structure foundation, however, the method needs to adopt a slurry retaining wall, so that a series of related procedures such as slurry preparation, slurry tank excavation, sedimentation tank and the like are needed, the construction period is long, and the environment is polluted; secondly, excavation of foundation pits with large sizes is carried out, however, the requirement on the surrounding environment is high, and particularly, for the excessively complex surrounding environment, a lot of pipelines and underground structures are involved, so that the traffic transit time of roads is influenced to be long.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model aims to provide a pier stud cushion cap basis, basic excavation work load is little, and construction speed is fast, and the time limit for a project is short, and is little to all ring edge borders influence.

According to the utility model discloses pier stud cushion cap basis, include excavation supporting and pour the concrete structure in excavation supporting, wherein, excavation supporting includes: a plurality of sheet piles, it is a plurality of the sheet pile is along circumference end to end, every the sheet pile includes first sheet pile section and two second sheet pile sections, two the second sheet pile section is connected respectively the both ends of first sheet pile section, two the second sheet pile section all is located same one side of first sheet pile section, and follow the orientation and keep away from direction, two of first sheet pile section distance between the second sheet pile section is crescent, two the second sheet pile section all has the orientation and deviates from each other and to the portion of bending of first sheet pile section, adjacent two pass through between the sheet pile bend a reverse connection.

According to the utility model discloses pier stud cushion cap basis, through setting up two second sheet pile sections in same one side of first sheet pile section, and along the direction of keeping away from first sheet pile section, the distance between two second sheet pile sections is crescent, make the distance between two second sheet pile sections be greater than the length of first sheet pile section, thereby in excavation supporting's circumference, the sheet pile can have certain flexible volume, and reduce the number of sheet pile in the excavation supporting, reduce cost. In addition, through the back connection of the portion of bending between two adjacent sheet piles, guarantee the stability that two adjacent sheet piles are connected effectively, compare with the traditional mode of the direct construction pile foundation under the structure foundation simultaneously, can accelerate the speed of construction, reduction of erection time.

According to some embodiments of the utility model, at least one of second sheet pile section the portion of bending is first portion of bending, first portion of bending includes: the first bending section is connected to the free end of the second sheet pile section, extends towards the direction far away from the other second sheet pile section and is parallel to the first sheet pile section; the second section of bending, the second section of bending is connected the free end of first section of bending just faces first sheet pile section extends.

According to some embodiments of the utility model, it is a plurality of the sheet pile includes first sheet pile, two of first sheet pile the second sheet pile section the portion of bending is first portion of bending.

According to some embodiments of the utility model, it is a plurality of the sheet pile includes the second sheet pile, one of them of second sheet pile the second sheet pile section the portion of bending do first portion of bending, another the second sheet pile section the portion of bending is the second portion of bending, the second portion of bending includes: the third bending section is connected to the free end of the second sheet pile section, extends towards the direction far away from the other second sheet pile section and is parallel to the first sheet pile section; a fourth bending section which is connected to the free end of the third bending section and is perpendicular to the first sheet pile section; the fifth bending section is connected to the free end of the fourth bending section, and the direction of the second sheet pile section is followed the fifth bending section with the distance between the third bending section reduces gradually.

According to some embodiments of the utility model, it is a plurality of the sheet pile includes the third sheet pile, one of them of third sheet pile the second sheet pile section the portion of bending does first portion of bending, another the second sheet pile section the portion of bending is the third portion of bending, along the orientation first sheet pile section place planar direction the free end of third portion of bending and corresponding distance between the second sheet pile section increases gradually.

According to the utility model discloses a some embodiments, excavation supporting's cross sectional shape is the polygon, excavation supporting includes along many limits of circumference end to end, has the turning between every adjacent both sides, the corner does the second sheet pile or third sheet pile, every limit department does first sheet pile.

According to some embodiments of the invention, two of the second sheet pile sections extend obliquely relative to the first sheet pile section and are symmetrical about the longitudinal centre plane of the first sheet pile section.

According to the utility model discloses a some embodiments, every the upper end of sheet pile is formed with the through-hole, concrete structure establishes foundation ditch support's upper portion, be equipped with a plurality of reinforcing bars of staggered arrangement in the concrete structure, every the both ends of reinforcing bar all pass the correspondence the through-hole, concrete structure covers internal surface and surface on foundation ditch support upper portion.

According to some embodiments of the invention, each sheet pile is a stainless steel piece.

According to some embodiments of the utility model, lower part in the excavation supporting is equipped with encloses the purlin, excavation supporting's corner is equipped with support piece.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a foundation pit support of a pier stud bearing platform foundation according to an embodiment of the present invention;

figure 2 is a top plan view of an excavation support of the pier stud abutment foundation shown in figure 1;

figure 3 is a side view of an excavation support of the pier stud cap foundation shown in figure 1;

fig. 4 is a schematic view of a first sheet pile of a foundation pit support of a pier stud cap foundation according to an embodiment of the invention;

fig. 5 is a schematic view of a second sheet pile of a foundation pit support of a pier stud bearing platform foundation according to an embodiment of the present invention;

fig. 6 is a schematic view of a third sheet pile of a foundation pit support of a pier stud bearing platform foundation according to an embodiment of the present invention;

fig. 7 is a schematic view of a plurality of first sheet piles interconnected for foundation pit support of a pier stud cap foundation according to an embodiment of the present invention;

fig. 8 is a schematic view of the connection of a first sheet pile and a second sheet pile of a foundation pit support of a pier stud cap foundation according to an embodiment of the present invention;

fig. 9 is a schematic view of a first sheet pile, a second sheet pile and a third sheet pile of a foundation pit support of a pier stud bearing platform foundation according to an embodiment of the present invention;

fig. 10 is a schematic view of the assembly of the foundation pit support and the plurality of reinforcing bars of the pier stud abutment foundation according to the embodiment of the present invention;

fig. 11 is a top plan view of the assembly of the foundation pit supports and the plurality of reinforcing bars of the pier stud cap foundation shown in fig. 10;

figure 12 is a side view of the assembly of the excavation support shown in figure 10 with a plurality of reinforcing bars;

figure 13 is a schematic view of a foundation pit support according to an embodiment of the present invention located within the soil;

figure 14 is a schematic view of a pier stud cap foundation according to an embodiment of the invention;

fig. 15 is a top view of a pier stud cap foundation according to an embodiment of the present invention.

Reference numerals:

100: supporting a foundation pit;

1: sheet piling; 11: a first sheet pile; 111: a first sheet pile section; 1111: a through hole; 112: a second sheet pile section;

113: a first bending portion; 1131: a first bending section; 1132: a second bending section; 114: a second bending portion;

1141: a third bending section; 1142: a fourth bending section; 1143: a fifth bending section; 115: a third bend portion;

12: a second sheet pile; 13: a third sheet pile; 2: enclosing purlins; 3: a support member;

200: a pier stud cap foundation; 201: reinforcing steel bars; 202: a concrete structure; 203: a foundation pit; 300: and (3) soil.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A pier cap foundation 200 according to an embodiment of the present invention is described below with reference to fig. 1 to 15.

As shown in fig. 1-15, a pier foundation 200 according to an embodiment of the present invention includes an excavation supporting structure 100 and a concrete structure 202 poured in the excavation supporting structure 100.

Specifically, the foundation pit support 100 includes a plurality of sheet piles 1 connected end to end in the circumferential direction. In the description of the present invention, "a plurality" means two or more. Every sheet pile 1 includes first sheet pile section 111 and two second sheet pile sections 112, two second sheet pile sections 112 are connected respectively at the both ends of first sheet pile section 111, two second sheet pile sections 112 all lie in same one side of first sheet pile section 111, and follow the orientation of keeping away from first sheet pile section 111, distance between two second sheet pile sections 112 is crescent gradually, two second sheet pile sections 112 all have the orientation and deviate from each other and to the portion of bending of first sheet pile section 111, through the portion of bending reverse connection between two adjacent sheet piles 1.

For example, in the example of fig. 1 to 6, a plurality of sheet piles 1 are sequentially connected end to end along the circumferential direction of the foundation pit support 100, the sheet piles 1 are substantially trapezoidal, two ends of a first sheet pile section 111 are respectively connected with one end of two second sheet pile sections 112, the two second sheet pile sections 112 are located on the same side in the thickness direction of the first sheet pile section 111, the distance between the two second sheet pile sections 112 is gradually increased along the direction away from the first sheet pile section 111, so that the distance between the other ends of the two second sheet pile sections 112 is greater than the width of the first sheet pile section 111, and thus, the sheet piles 1 can have a certain amount of expansion and contraction in the circumferential direction of the foundation pit support 100, and the number of sheet piles 1 in the foundation pit support 100 can be reduced, which reduces the cost. The above-mentioned other end of two second sheet pile sections 112 is equipped with the portion of bending respectively, the direction of bending of the portion of bending is towards first sheet pile section 111, connect through the cooperation of the portion of bending between two adjacent sheet piles, and two first sheet pile sections 111 of two adjacent sheet piles 1 after connecting are located the both sides of the portion of bending respectively, therefore, can effectively guarantee the stability that two adjacent sheet piles 1 are connected, compare with the mode of traditional direct construction pier stud cushion cap basis under the structure basis simultaneously, a plurality of sheet piles 1 are along circumference end to end's excavation supporting 100, need not prepare mud, excavate the mud pit, a series of relevant processes such as sedimentation tank, thereby can accelerate the speed of construction, the reduction of erection time.

According to the utility model discloses pier stud cushion cap basis 200, through setting up two second sheet pile sections 112 in same one side of first sheet pile section 111, and along the orientation direction of keeping away from first sheet pile section 111, distance between two second sheet pile sections 112 increases gradually, make distance between two second sheet pile sections 112 be greater than the length of first sheet pile section 111, thereby in excavation supporting 100's week, sheet pile 1 can have certain flexible volume, and reduce the number of sheet pile 1 in excavation supporting 100, and the cost is reduced. In addition, through the back connection of the portion of bending between two adjacent sheet piles 1, guarantee the stability that two adjacent sheet piles 1 are connected effectively, compare with the mode of traditional direct construction pier stud cushion cap basis under the structure basis simultaneously, can accelerate the speed of construction, reduction of erection time.

According to some embodiments of the present invention, referring to fig. 4 and 5, the bending portion of at least one second sheet pile segment 112 is the first bending portion 113, the first bending portion 113 includes the first bending section 1131 and the second bending section 1132, the first bending section 1131 is connected at the free end of the second sheet pile segment 112, the first bending section 1131 extends towards the direction of keeping away from another second sheet pile segment 112 and is parallel to the first sheet pile segment 111, and the second bending section 1132 is connected at the free end of the first bending section 1131 and extends towards the first sheet pile segment 111. The bent portion of one of the second sheet pile segments 112 may be a first bent portion 113 (as shown in fig. 5 and 6), or the bent portions of both the second sheet pile segments 112 may be the first bent portion 113 (as shown in fig. 4). The extending direction of the first bending section 1131 is parallel to the first sheet pile section 111, so that the first bending section 1131 is processed, one end of the second bending section 1132 is connected with the free end of the first bending section 1131, the other end of the second bending section 1132 extends towards the first sheet pile section 111, and the included angle between the first bending section 1131 and the second bending section 1132 is less than 90 °. From this, through setting the contained angle between first bending section 1131 and the second bending section 1132 to the acute angle, can avoid two adjacent sheet piles 1's the portion of bending junction to break away from effectively, further guarantee the stability that two adjacent sheet piles 1 connect. According to some embodiments of the present invention, as shown in fig. 4 and 7, the plurality of sheet piles 1 includes a first sheet pile 11, and the bent portions of the two second sheet pile sections 112 of the first sheet pile 11 are first bent portions 113. Thereby, it is facilitated to interconnect a plurality of sheet piles 1, while the first sheet pile 11 is simple in structure and easy to process.

According to the utility model discloses a further embodiment, refer to fig. 5, a plurality of sheet piles 1 include second sheet pile 12, one of them second sheet pile section 112 of second sheet pile 12's bending portion is first bending 113, another second sheet pile section 112's bending portion is second bending 114, second bending 114 includes third bending section 1141, fourth bending section 1142 and fifth bending section 1143, third bending section 1141 is connected at the free end of second sheet pile section 112, third bending section 1141 extends and is parallel with first sheet pile section 111 towards the direction of keeping away from another second sheet pile section 112, fourth bending section 1142 is connected at the free end of third bending section 1141 and perpendicular with first sheet pile section 111, fifth bending section 1143 is connected at the free end of fourth bending section 1142, and along the direction towards second sheet pile section 112, the distance between fifth bending section 1143 and the third bending section 1141 reduces gradually.

For example, in the example of fig. 5 and 8, the free end of one of the second sheet pile segments 112 of the second sheet pile 12 is provided with a first bend 113 and the free end of the other second sheet pile segment 112 is provided with a second bend 114. The included angle between the third bent section 1141 and the fourth bent section 1142 is approximately 90 °, and the included angle between the fourth bent section 1142 and the fifth bent section 1143 is less than 90 °. When two adjacent sheet piles 1 are the first sheet pile 11 and the second sheet pile 12, the first bending portion 113 of the first sheet pile 11 and the second bending portion 114 of the second sheet pile 12 are matched with each other, and at this time, the first bending portion 113 is located in the second bending portion 114, so that the connection firmness of the first sheet pile 11 and the second sheet pile 12 is effectively ensured.

Furthermore, the sheet piles 1 include a third sheet pile 13, the bent portion of one second sheet pile section 112 of the third sheet pile 13 is a first bent portion 113, the bent portion of the other second sheet pile section 112 is a third bent portion 115, and the distance between the free end of the third bent portion 115 and the corresponding second sheet pile section 112 gradually increases along the direction toward the plane where the first sheet pile section 111 is located. Referring to fig. 6 and 9, the included angle between the third bending portion 115 and the plane of the first sheet pile section 111 is greater than 90 °, when the first sheet pile 11, the second sheet pile 12 and the third sheet pile 13 are connected, the third sheet pile 13 is located between the first sheet pile 11 and the second sheet pile 12, the first bending portion 113 of the third sheet pile 13 is in fit connection with the first bending portion 113 of the second sheet pile 12, and the third bending portion 115 of the third sheet pile 13 is in fit connection with the first bending portion 113 of the first sheet pile 11, so that the connection stability between the third sheet pile 13 and the first sheet pile 11 and the second sheet pile 12 is ensured.

According to some embodiments of the utility model, excavation supporting 100's cross sectional shape is the polygon, and excavation supporting 100 includes along many limits of circumference end to end, has the turning between every adjacent both sides, and the corner is second sheet pile 12 or third sheet pile 13, and every limit department is first sheet pile 11. For example, as shown in fig. 1, 2 and 3, the cross-sectional shape of the foundation pit support 100 is rectangular, a plurality of first sheet piles 11 are connected to each other on four sides of the foundation pit support 100, the sheet piles 1 at three corners of the foundation pit support 100 are second sheet piles 12, the sheet piles 1 at the remaining one corner are third sheet piles 13, and the third sheet piles 13 are arranged at one corner of the foundation pit support 100, so that the foundation pit support 100 is easily enclosed into a polygon, and the foundation pit support 100 is convenient to disassemble.

Alternatively, referring to fig. 4, 5 and 6, two second sheet pile segments 112 extend obliquely with respect to the first sheet pile segment 111 and are symmetrical with respect to the longitudinal center plane of the first sheet pile segment 111. Therefore, the sheet pile 1 is simple in structure, the sheet pile 1 is convenient to machine, and the cost is reduced.

According to some embodiments of the utility model, the upper end of every sheet pile 1 is formed with through-hole 1111, and concrete structure 202 is established on foundation ditch support 100's upper portion, is equipped with a plurality of reinforcing bars 201 of staggered arrangement in the concrete structure 202, and corresponding through-hole 1111 is all passed at every reinforcing bar 201's both ends, and concrete structure 202 covers the internal surface and the surface on foundation ditch support 100 upper portion. As shown in fig. 10 to 12, the through hole 1111 is substantially located at one end of the sheet pile 1 in the length direction, the reinforcing bars 201 may pass through the through hole 1111 and be installed on the two opposite sheet piles 1, and the plurality of reinforcing bars 201 at the one end of the foundation pit support 100 are arranged in a staggered manner, which not only effectively connects the foundation pit support 100 and the reinforcing bars 201 into a whole, but also increases the bearing capacity of the foundation pit support 100. Concrete structure 202 is poured on the inner surface and the outer surface of the upper portion of foundation pit support 100, so that the stability of pier stud abutment foundation 200 is ensured, pier stud abutment foundation 200 can bear larger soil pressure, and the foundation bearing capacity of pier stud abutment foundation 200 is improved.

Of course, the present invention is not limited thereto, and the concrete structure 202 may cover the inner surface of the entire foundation pit support 100, and at this time, the concrete structure 202 fills the entire foundation pit support 100; the concrete structure 202 may also cover the entire interior and exterior surfaces of the excavation 100, with the concrete structure 202 being cast throughout the excavation 100 and a portion of the concrete structure 202 being cast on the exterior surface of the excavation 100. Thereby, the foundation bearing capacity of the pier stud cap foundation 200 is improved.

In some alternative embodiments, each sheet pile 1 is a stainless steel piece. The stainless steel part has corrosion resistance, so that the sheet pile 1 is effectively prevented from being corroded underground, and the service life of the foundation pit support 100 is prolonged. But is not limited thereto.

According to some embodiments of the utility model, the lower part in excavation supporting 100 is equipped with encloses purlin 2, and excavation supporting 100's corner is equipped with support piece 3.

For example, in the example of fig. 14 and 15, the enclosing purlin 2 is disposed at the lower portion in the foundation pit support 100, the enclosing purlin 2 is circumferentially disposed below the inside of the foundation pit support 100, and the support members 3 are respectively supported at four corners of the foundation pit support 100, so that the structural strength of the foundation pit support 100 is effectively increased. Optionally, the purlin 2 may be an i-steel purlin, and the support member 3 may be an i-steel angle.

According to the utility model discloses pier stud cushion cap basis 200, as shown in fig. 13-fig. 15, dug the foundation ditch 203 of installation excavation supporting 100 in soil 300, foundation ditch 203's size roughly is the same with excavation supporting 100, compares with the great foundation ditch 203 of traditional excavation size, has reduced the requirement to all ring edge borders, to too complicated all ring edge borders, also can dig and establish foundation ditch 203 under the current condition of traffic that does not influence the road. One end of the foundation pit support 100 with the through hole 1111 extends out of the foundation pit 203 and is located above the foundation pit 203, and the other end of the foundation pit support 100 is located in the foundation pit 203. Thus, by using the foundation pit support 100, the size of the foundation pit 203 is reduced, and the workload of earth excavation is reduced.

According to the utility model discloses pier stud cushion cap basis 200's construction method can be as follows: first sheet pile 11, second sheet pile 12 and third sheet pile 13 interconnect becomes the required excavation supporting 100 of design, will enclose purlin 2 circumference and arrange in the below of excavation supporting 100's inside, excavation supporting 100's four corners adopts support piece 3 to support respectively, wear to establish reinforcing bar 201 at the one end that excavation supporting 100 was equipped with through-hole 1111 simultaneously, will wear excavation supporting 100 who has penetrated reinforcing bar 201 and squeeze into in the foundation ditch 203, later with excavation supporting 100 be equipped with the one end anchor of reinforcing bar 201 in cushion cap 202, pour basic concrete at last, accomplish whole pier stud cushion cap basis 200.

According to the utility model discloses pier stud cushion cap basis 200 adopts the utility model discloses the excavation supporting 100 of above-mentioned first aspect embodiment has following effect: (1) the construction speed is high, and the construction period is shortened; (2) the excavation size of the foundation pit 203 is small, so that the influence on the surrounding environment is small; (3) the workload of earth excavation is small; (4) the foundation pit support 100 can bear large soil pressure; (5) the load bearing capacity of the foundation pit support 100 is enhanced.

Other constructions and operations of the pier cap foundation 200 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A pier stud and cap foundation, comprising: excavation supporting and pour in concrete structure in the excavation supporting, wherein, excavation supporting includes:

a plurality of sheet piles, it is a plurality of the sheet pile is along circumference end to end, every the sheet pile includes first sheet pile section and two second sheet pile sections, two the second sheet pile section is connected respectively the both ends of first sheet pile section, two the second sheet pile section all is located same one side of first sheet pile section, and follow the orientation and keep away from direction, two of first sheet pile section distance between the second sheet pile section is crescent, two the second sheet pile section all has the orientation and deviates from each other and to the portion of bending of first sheet pile section, adjacent two pass through between the sheet pile bend a reverse connection.

2. The pier stud cap foundation of claim 1, wherein the bending portion of at least one of the second sheet pile segments is a first bending portion, the first bending portion comprising:

the first bending section is connected to the free end of the second sheet pile section, extends towards the direction far away from the other second sheet pile section and is parallel to the first sheet pile section;

the second section of bending, the second section of bending is connected the free end of first section of bending just faces first sheet pile section extends.

3. The pier foundation of claim 2, wherein the plurality of sheet piles comprises a first sheet pile, and the bent portions of the two second sheet pile sections of the first sheet pile are first bent portions.

4. The pier foundation of claim 2 or 3, wherein the plurality of sheet piles comprises a second sheet pile, the bent portion of one of the second sheet pile sections of the second sheet pile is the first bent portion, the bent portion of the other second sheet pile section is a second bent portion,

the second bending part includes:

the third bending section is connected to the free end of the second sheet pile section, extends towards the direction far away from the other second sheet pile section and is parallel to the first sheet pile section;

a fourth bending section which is connected to the free end of the third bending section and is perpendicular to the first sheet pile section;

the fifth bending section is connected to the free end of the fourth bending section, and the direction of the second sheet pile section is followed the fifth bending section with the distance between the third bending section reduces gradually.

5. The pier stud and abutment foundation of claim 4, wherein the plurality of sheet piles includes a third sheet pile, the bent portion of one of the second sheet pile sections of the third sheet pile is the first bent portion, the bent portion of the other of the second sheet pile sections is a third bent portion, and the distance between the free end of the third bent portion and the corresponding second sheet pile section increases gradually in the direction toward the plane where the first sheet pile section is located.

6. The pier stud and abutment foundation of claim 5, wherein the cross-sectional shape of the foundation pit support is polygonal, the foundation pit support comprises a plurality of edges connected end to end along the circumferential direction, a corner is arranged between each two adjacent edges, the corner is the second sheet pile or the third sheet pile, and each edge is the first sheet pile.

7. The pier foundation of claim 1, wherein two of said second sheet pile segments extend obliquely with respect to said first sheet pile segment and are symmetrical with respect to a longitudinal center plane of said first sheet pile segment.

8. The pier foundation of claim 1, wherein a through hole is formed at an upper end of each of the sheet piles;

the concrete structure is arranged on the upper portion of the foundation pit support, a plurality of reinforcing steel bars are arranged in the concrete structure in a staggered mode, two ends of each reinforcing steel bar penetrate through the corresponding through holes, and the concrete structure covers the inner surface and the outer surface of the upper portion of the foundation pit support.

9. The pier cap foundation of claim 1, wherein each of the sheet piles is a stainless steel member.

10. The pier stud and abutment foundation of claim 1, wherein an enclosing purlin is provided at a lower portion of the foundation pit support, and support members are provided at corners of the foundation pit support.

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