阅读说明：本技术 一种基坑支护结构 (Foundation pit supporting structure ) 是由 李长安 国斌 罗章波 郎瑶 刘雪斌 黄新连 高煌 李平定 刘力 周丁恒 顾翔 于 2020-06-24 设计创作，主要内容包括：本申请实施例提供了一种基坑支护结构,包括：多个前排桩,各个所述前排桩以间隔设置的方式围在基坑的外围,且所述前排桩设置在基坑外围的地基土中；多个后排桩,各个所述后排桩以间隔设置的方式围在所述前排桩的外围,且所述后排桩设置在所述前排桩外围的地基土中；连接结构,形成在所述前排桩和所述后排桩的顶端,固定连接所述前排桩和所述后排桩。本申请实施例解决了传统的基坑支护结构的适用环境受限的技术问题。(The embodiment of the application provides a foundation ditch supporting construction, includes: the front row piles are arranged at intervals and surround the periphery of the foundation pit, and are arranged in foundation soil at the periphery of the foundation pit; the rear row piles surround the periphery of the front row piles at intervals, and are arranged in foundation soil at the periphery of the front row piles; and the connecting structure is formed at the top ends of the front row of piles and the rear row of piles and fixedly connected with the front row of piles and the rear row of piles. The technical problem that the application environment of a traditional foundation pit supporting structure is limited is solved.)

1. A foundation pit supporting structure, comprising:

the front row piles are arranged at intervals and surround the periphery of the foundation pit, and are arranged in foundation soil at the periphery of the foundation pit;

the rear row piles surround the periphery of the front row piles at intervals, and are arranged in foundation soil at the periphery of the front row piles;

and the connecting structure is formed at the top ends of the front row of piles and the rear row of piles and fixedly connected with the front row of piles and the rear row of piles.

2. The foundation pit supporting structure according to claim 1, wherein the front row of piles and the rear row of piles are identical in number and are arranged in a one-to-one opposed relationship.

3. The foundation pit supporting structure according to claim 2, wherein the distance between the front row piles is 1.5 times or more and two times or less the diameter of the front row piles;

the distance between the front row of piles and the rear row of piles is more than or equal to two times of the diameter of the front row of piles and less than or equal to four times of the diameter of the front row of piles;

and the diameter of the front row of piles is equal to that of the rear row of piles.

4. The excavation supporting structure of claim 3, wherein the connection structure comprises:

the front row pile crown beam is formed at the top end of the front row pile and is connected with each front row pile into a whole;

the rear row pile crown beam is formed at the top end of the rear row pile and is connected with each rear row pile into a whole;

and the two ends of each connecting beam are respectively connected with the front row of pile crown beams and the rear row of pile crown beams, and the connecting beams are arranged at intervals.

5. The foundation pit supporting structure according to claim 4, wherein the connecting beam is positioned between the front row of piles and the rear row of piles which are oppositely arranged, and one connecting beam is arranged every other one or two or three groups of piles;

wherein the front row of piles and the rear row of piles which are oppositely arranged in a one-to-one mode form a group of row piles.

6. The excavation supporting structure of claim 5, wherein the width of the connection beam is consistent with the diameter of the front row of piles;

the length of the connecting beam is the distance between the front row of piles and the rear row of piles which are oppositely arranged, and the width of the connecting beam is the distance between the connecting beam and the horizontal plane in the vertical direction.

7. The foundation pit supporting structure according to claim 6, wherein the upper surfaces of the connection beams, the front row of pile crown beams, and the rear row of pile crown beams are flat;

the lower surfaces of the connecting beams, the front row of pile crown beams and the rear row of pile crown beams are flat; the connecting beam, the front row of pile crown beams and the rear row of pile crown beams are of an integrated structure and are formed by one-time pouring.

8. The excavation supporting structure of claim 3, wherein the connection structure comprises:

the front row pile crown beam is formed at the top end of the front row pile and is connected with each front row pile into a whole;

the rear row pile crown beam is formed at the top end of the rear row pile and is connected with each rear row pile into a whole;

a connecting plate formed between the front row of pile crown beams and the rear row of pile crown beams and sealing a gap between the front row of pile crown beams and the rear row of pile crown beams;

the upper surfaces of the connecting beams, the front row of pile crown beams and the rear row of pile crown beams are flat; the lower surface of the front row of pile crown beams and the lower surface of the rear row of pile crown beams are flat, and the thickness of the connecting plate is half of that of the front row of pile crown beams.

9. The foundation pit supporting structure according to claim 8, wherein the connecting plate, the front row of pile crown beams, and the rear row of pile crown beams are an integrated structure and formed by one-time pouring.

10. The foundation pit supporting structure according to claim 7 or 8, wherein the front row of pile crown beams are connected end to form a closed shape, and the rear row of pile crown beams are connected end to form a closed shape.

11. The foundation pit supporting structure according to claim 10, wherein the front row of piles and the rear row of piles are cast-in-place piles; the bored concrete pile includes:

the reinforcement cage is vertically arranged in a pile hole formed in foundation soil;

the I-shaped steel is vertically arranged in the hole defined by the reinforcement cage, and the upper end of the I-shaped steel protrudes out of the upper end of the reinforcement cage;

the pile body is formed by pouring concrete on the inner side and the outer side of the reinforcement cage, and the upper end of the I-shaped steel protrudes out of the upper end of the pile body;

the upper end of the pile body is provided with an I-shaped steel, the I-shaped steel protrudes out of the upper end of the pile body and extends into a crown beam, and the crown beam comprises the front row pile crown beam and the rear row pile crown beam.

12. The foundation pit supporting structure according to claim 11, wherein the height of the i-steel protruding from the upper end of the pile body and extending into the crown beam is greater than or equal to one third of the thickness of the crown beam and less than or equal to four fifths of the thickness of the crown beam.

13. The excavation supporting structure of claim 3, wherein the connection structure comprises:

and the transverse bridging beam is formed at the top ends of the front row of piles and the rear row of piles and spans the gap between the front row of piles and the rear row of piles.

Technical Field

The application relates to the technical field of constructional engineering, in particular to a foundation pit supporting structure.

Background

In urban rail transit and industrial and civil building foundation pit engineering, deep foundation pit engineering constructed by an open cut method usually adopts a retaining pile, a steel support, a retaining pile, an anchor cable and a cantilever type support structure. When the foundation pit is in a long and narrow arrangement and is deeper, the retaining pile and steel support supporting structure is adopted more reasonably; when the foundation pit is wide, large, irregularly arranged and deep, the fender post and anchor cable supporting structure is adopted reasonably; when the foundation pit is shallow, the periphery is spacious, and the requirements on foundation pit deformation and ground surface settlement are not high, the cantilever type supporting structure is reasonable. In the foundation pit with complex surrounding environment, irregular shape, special shape and deep, if a closer building and dense important pipelines exist; if a supporting type supporting structure is adopted, the problems that the supporting arrangement is complex, the force transmission path is not clear enough, the manufacturing cost is high and the like exist; if an anchor-pull type supporting structure is adopted, the anchor cable cannot be laid due to the influence of surrounding buildings (structures) and pipelines; if a cantilever type supporting structure form is adopted, the problems of large embedding depth, large pile diameter, adverse control of surface subsidence and foundation pit deformation, influence on the safety of the surrounding environment, high manufacturing cost and the like exist. The prior art is not applicable to the common foundation pit supporting structure forms in the prior art under the strict limiting conditions of complex surrounding environment, tense conditions, strange and irregular foundation pit shapes, high requirements for controlling foundation pit deformation and ground surface settlement and the like.

Therefore, the applicable environment of the conventional foundation pit supporting structure is limited, which is a technical problem that needs to be solved urgently by those skilled in the art.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not form the prior art that is known to those of ordinary skill in the art.

Disclosure of Invention

The embodiment of the application provides a foundation pit supporting structure to solve the technical problem that the application environment of the traditional foundation pit supporting structure is limited.

The embodiment of the application provides a foundation ditch supporting construction, includes:

the front row piles are arranged at intervals and surround the periphery of the foundation pit, and are arranged in foundation soil at the periphery of the foundation pit;

the rear row piles surround the periphery of the front row piles at intervals, and are arranged in foundation soil at the periphery of the front row piles;

and the connecting structure is formed at the top ends of the front row of piles and the rear row of piles and fixedly connected with the front row of piles and the rear row of piles.

Due to the adoption of the technical scheme, the embodiment of the application has the following technical effects:

each front row pile encloses in the outlying foundation soil of foundation ditch with the mode that the interval set up, each back row pile encloses in the outlying foundation soil of front row pile with the mode that the interval set up, through connection structure, with front row pile and back row pile fixed connection as an organic whole, like this, the power that any position of foundation ditch supporting construction received can both disperse on whole foundation ditch supporting construction, make foundation ditch supporting construction's atress comparatively even, can guarantee underground structure construction and foundation ditch all around environment's safety. The foundation pit supporting structure is a structure along the periphery of the foundation pit, and the foundation pit supporting structure is only arranged along the periphery of the foundation pit no matter the shape of the foundation pit is regular or irregular; meanwhile, the width of the foundation pit supporting structure at any position on the periphery of the foundation pit is narrow, and the width can be adjusted adaptively along with the surrounding environment of the foundation pit so as to avoid structures such as underground pipelines and the like, and the foundation pit supporting structure can be suitable for the complex scene of the surrounding environment of the foundation pit. Therefore, the foundation pit supporting structure disclosed by the embodiment of the application can be suitable for foundation pits of any shapes, and has higher adaptability to the surrounding environment of the foundation pit, namely, the application environment is wider; meanwhile, the stress is uniform, and the safety of underground structure construction and the surrounding environment of the foundation pit can be ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a top perspective view of a foundation pit support structure of an embodiment of the present application disposed about a periphery of a foundation pit;

FIG. 2 is a schematic partial elevational view of FIG. 1;

fig. 3 is an elevation schematic view of a foundation pit supporting structure according to a second embodiment of the present application;

fig. 4 is a top perspective view of a foundation pit supporting structure according to a second embodiment of the present application;

fig. 5 is an elevation schematic view of a foundation pit supporting structure according to a third embodiment of the present application;

fig. 6 is a top perspective view of a foundation pit supporting structure according to a third embodiment of the present application;

fig. 7 is an elevation schematic view of a foundation pit supporting structure according to a fourth embodiment of the present application;

fig. 8 is a top perspective view of an excavation supporting structure according to a fourth embodiment of the present application.

Description of reference numerals:

110 front row piles, 120 rear row piles, 130I-shaped steel,

210 front row pile crown beams, 220 rear row pile crown beams, 230 connecting beams, 240 connecting plates,

250 transversely span the beam across the beam,

10 foundation pits and 20 buildings.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.