Foundation pit supporting system with gravity type retaining wall combined with pouring type row pile enclosure

Abstract

The utility model discloses a foundation pit supporting system with gravity type retaining walls combined with pouring type row pile enclosure, which is characterized by comprising a plurality of groups of retaining walls and pile bodies, the retaining walls are strip-shaped, two ends of each retaining wall are provided with inward step-shaped end heads, adjacent retaining walls are spliced to form inward grooves, square pile bodies are arranged at the grooves, the square pile bodies penetrate into a soil body, and the pile bodies penetrate into the soil body. Connecting walls are poured in the grooves, the square pile bodies and the two adjacent retaining walls are connected into a whole in a pouring mode through the connecting walls, and the connecting walls are provided with supporting parts inwards exceeding the inner side faces of the retaining walls. According to the foundation pit supporting system, the retaining wall can be supported more powerfully, the foundation pit supporting system and the retaining wall form an integrated pouring structure, the structural firmness and stability of the foundation pit supporting system are improved, and meanwhile efficient waterproof performance at the joint of the retaining wall is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support, specifically relating to a foundation pit support system that combines gravity retaining walls with cast-in-place pile retaining. Background Technology

[0002] The use of gravity retaining walls in the construction of foundation pits is mainly to prevent water and soil from flowing into the pit during construction, so as to ensure the safety of construction inside the pit. The choice of deep foundation pit support type can easily affect the surrounding environment and reduce the safety and reliability of the building.

[0003] Chinese Patent Publication No. CN208792365U discloses a cement-soil gravity retaining wall. The key technical features of this cement-soil gravity retaining wall include a cement-soil retaining wall surrounding the foundation pit, vertical anti-overturning anchors on the side of the cement-soil retaining wall away from the foundation pit, and a capping plate on top of the cement-soil retaining wall. The cement-soil retaining wall is used for support to meet the requirements for anti-slip stability. The addition of vertical anti-overturning anchors on the outer side of the cement-soil retaining wall, together with the cement-soil retaining wall and the capping plate, forms an organic whole, ensuring that the anti-overturning stability of the retaining wall meets the design requirements.

[0004] However, it still has drawbacks: the cement-soil gravity retaining wall design it adopts lacks adaptability and is difficult to use under various geological conditions. In addition, the bearing capacity of the cement-soil gravity retaining wall is limited and the construction period is long. Therefore, it is necessary to design a foundation pit support form that can combine the two foundation pit support forms to make up for the problems of poor adaptability or low construction efficiency when using a single gravity retaining wall as the foundation pit support form. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a foundation pit support system that combines gravity retaining wall with cast-in-place pile retaining, which can improve the stability and construction efficiency of the foundation pit support system.

[0006] Therefore, this utility model is implemented using the following technical solution:

[0007] A foundation pit support system combining gravity retaining walls and cast-in-place pile retaining is characterized by comprising multiple sets of retaining walls and piles. The retaining walls are elongated and have inward-facing stepped ends at both ends. Adjacent retaining walls are joined to form inward-facing grooves. Square piles are installed in the grooves and are embedded in the soil. A connecting wall is cast into the grooves, which connects the square piles and two adjacent retaining walls into a single unit. The connecting wall has a support portion extending inward beyond the inner side of the retaining walls.

[0008] Furthermore, the inner side of the middle part of the retaining wall has an arc-shaped section, and a circular pile is provided in the arc-shaped section.

[0009] Further, the pile body is a cast-in-place pile, and the precast retaining wall is hoisted and installed to form an assembly with the pile body.

[0010] Further, a steel reinforcement cage is arranged in the connecting wall, the steel reinforcement cage is wrapped in the square pile body, and the connecting wall is formed by pouring waterproof concrete.

[0011] Further, the joint between adjacent retaining walls is filled with epoxy resin.

[0012] Further, the joint between adjacent retaining walls and connecting walls is filled with epoxy resin.

[0013] The technical effects of the gravity type retaining wall combined with the cast-in-place row pile enclosure foundation pit support system are as follows:

[0014] I. The square pile and the connecting wall are arranged in the groove between adjacent retaining walls, can realize stronger support for the retaining wall, form an integral pouring structure with the retaining wall, improve the structural firmness and stability, and simultaneously consider the efficient waterproofing of the joint of the retaining wall.

[0015] II. In the retaining wall and pile body assembly structure, the retaining wall can be largely precast, the retaining wall can be quickly hoisted and assembled with the pile body, can consider the firmness and the efficient construction, and can effectively shorten the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model has the following drawings:

[0017] Fig. 1 It is a top view structure schematic diagram of the gravity type retaining wall combined with the cast-in-place row pile enclosure foundation pit support system; it is a structure plane schematic diagram

[0018] Fig. 2 It is a longitudinal section of the gravity type retaining wall combined with the cast-in-place row pile enclosure foundation pit support system.

[0019] Reference signs: 1, retaining wall; 2, circular pile body; 3, square pile body; 4, connecting wall; 5, steel reinforcement cage; 6, foundation pit. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below with reference to the drawings and preferred embodiments.

[0021] Reference Figs. 1-2As shown, the utility model first embodiment provides gravity type retaining wall combined perfusion type row pile enclosure's foundation pit support system, including multiple groups retaining wall 1 and stake body, retaining wall 1 is long strip, retaining wall 1 both ends have the ladder shape end head to the inside, after splicing, adjacent retaining wall 1 forms the recess to the inside, and the splicing of adjacent retaining wall 1 is filled with epoxy resin.

[0022] Square stake body 3 is arranged at the recess, and the square stake body 3 penetrates into the soil body; the inner side of the middle part of the retaining wall 1 has an arc-shaped part, and the arc-shaped part is provided with a circular stake body 2. The circular stake body 2 and the square stake body respectively play the supporting role of the retaining wall 1 and the splicing part of the multiple retaining walls, and realize the combined construction of the gravity type retaining wall and the perfusion type row pile enclosure, so that the advantages of the two structures are better exerted.

[0023] Both the two kinds of stake bodies arranged in the retaining wall 1 are perfusion piles, and after the stake body is arranged, the retaining wall 1 formed by hoisting prefabrication is assembled with the stake body, the prefabricated retaining wall 1 can be manufactured synchronously with the perfusion pile, so that the construction period is reduced.

[0024] The recess is poured with a connecting wall 4, the connecting wall 4 integrally connects the square stake body 3 and the two adjacent retaining walls 1 by pouring, the connecting wall 4 has a supporting part which exceeds the inner side surface of the retaining wall 1 inwardly, the connecting wall 4 further provides the supporting force for the splicing part of the multiple retaining walls 1 by being arranged, and the stability of the combined support system is improved.

[0025] The connecting wall 4 is provided with a steel reinforcement cage 5, the steel reinforcement cage 5 wraps the square stake body 3, the connecting wall 4 is formed by pouring waterproof concrete, and the splicing part of the adjacent retaining wall 1 and the connecting wall 4 is filled with epoxy resin, the epoxy resin can resist water, prevent corrosion, strengthen the water resistance of the support system, and also can play a certain bonding effect.

[0026] The above technical scheme is adopted, the retaining wall is used for supporting in the outer side of the foundation pit supporting system, so as to meet the performance requirement of the foundation pit supporting system for retaining soil and preventing water, the retaining wall is in a segmented combination form, a square pile body 3 is arranged in the groove formed at the splicing position of the retaining wall 1, a connecting wall 4 is poured at the groove position and the square pile body 3 and the adjacent retaining wall 1 are connected integrally, so that the segmented splicing position of the retaining wall 1 is supported more strongly by the square pile body 3 and the connecting wall 4, the stability of the splicing position of the retaining wall 1 is improved, the gravity type retaining wall can be combined with the cast-in-place row pile enclosure for construction through the structure, a more stable and firm foundation pit supporting system is formed, the square pile body 3 is wrapped by a square steel reinforcement cage 5 in the connecting wall 4 for reinforcement, and the support strength and stability of the combined structure are further improved. The circular pile body 2 is arranged in the arc-shaped part of the inner side of the middle part of the retaining wall, so that each retaining wall 1 can be uniformly supported by the cast-in-place pile. The cast-in-place row pile enclosure can increase the effective area, depth and strength of the foundation to enhance the bearing capacity of the foundation, so as to meet the requirement of the gravity type retaining wall structure on the bearing capacity and strength of soil. The foundation pit supporting system adopting the gravity type retaining wall combined with the cast-in-place row pile enclosure can improve the adaptability of the foundation pit supporting system, more conveniently control the construction quality of the cast-in-place pile, improve the construction efficiency and ensure the engineering quality of the whole foundation pit supporting system.

[0027] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical scheme of the present application. Any modification, change and modification of the above embodiments, which does not depart from the technical scheme of the present application, is still within the scope of the present application.

Claims

1. A foundation pit support system of gravity retaining wall combined with cast-in-place row pile enclosure, characterized in that: The application relates to a retaining wall and pile body, which comprises multiple groups of retaining walls and piles, the retaining walls are long strips, the two ends of the retaining walls are provided with inward stepped end heads, the adjacent retaining walls are spliced to form inward grooves, the grooves are provided with square piles, the square piles penetrate into the soil, the grooves are cast with connecting walls, the connecting walls integrally connect the square piles and the two adjacent retaining walls, and the connecting walls have supporting parts which exceed the inner side surfaces of the retaining walls.

2. The gravity retaining wall combined cast-in-place soldier pile enclosure foundation pit support system according to claim 1, characterized in that: The middle inner side of the retaining wall is provided with an arc-shaped part, and the arc-shaped part is provided with a circular pile.

3. The gravity retaining wall combined cast-in-place soldier pile enclosure foundation pit support system according to claim 2, characterized in that: The pile body is a cast-in-place pile, the retaining wall is hoisted after being precast, and the retaining wall and the pile body are spliced.

4. The gravity retaining wall combined cast-in-place soldier pile enclosure foundation pit support system according to claim 1 or 2 or 3, characterized in that: A steel reinforcement cage is arranged in the connecting wall, the steel reinforcement cage is wrapped in the square pile, and the connecting wall is formed by pouring waterproof concrete.

5. The gravity retaining wall combined cast-in-place soldier pile enclosure foundation pit support system according to claim 1 or 2 or 3, characterized in that: The splicing positions of the adjacent retaining walls are filled with epoxy resin.

6. The gravity retaining wall combined cast-in-place soldier pile enclosure foundation pit support system according to claim 4, characterized in that: The splicing positions of the adjacent retaining walls and the connecting walls are filled with epoxy resin.

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