Support structure for segmentally removing inner support of deep foundation pit adjacent to building

Abstract

The utility model discloses a supporting structure for subsection dismantling of an inner support of a deep foundation pit adjacent to a building, belongs to the field of building installation, and solves the problem that in the prior art, when the inner support of the deep foundation pit adjacent to the building is dismantled, control over peripheral deformation is poor. The bearing platform is supported at the lower part of a basement raft; the side parts of the basement raft and the support piles are arranged at intervals; a pouring force transmission belt is arranged between the side portion of the basement raft plate and the supporting pile, the pouring force transmission belt is formed by pouring concrete with the same grade as the basement raft plate, and the pouring force transmission belt is connected with the side portion of the basement raft plate and the supporting pile. According to the technical scheme, the supporting effect of the main body structure on the foundation pit is fully utilized, the supporting effect is improved, the number of the section steel inclined struts is reduced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to a support structure for segmented removal in a deep foundation pit adjacent to a building, and belongs to the field of building installation. Background Art

[0002] With the rapid development of urban construction, there are more and more large-scale urban complexes and the traffic volume is getting bigger and bigger. As a result, the number of underground garages is increasing and the foundation pit is getting deeper and deeper. In the city center, new large-scale urban complexes are built with complex surrounding environments, such as adjacent residential areas, urban main roads, subway lines, etc. Traditional foundation pit support anchor reinforcement can no longer meet the requirements of large deep foundation pits. Concrete internal support supplemented by steel structure support and other structures are required. For the construction of deep foundation pit basements in complex environments, various difficulties will be encountered when the internal support is subsequently removed. Especially for the removal of the internal support of the deep foundation pit adjacent to the building, the control of the surrounding deformation is a major problem, which affects the construction safety. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a support structure for segmented removal of supports in a deep foundation pit adjacent to a building, which fully utilizes the supporting effect of the main structure on the foundation pit, reduces the number of steel braces, and reduces costs.

[0004] The technical solution adopted by the utility model is a support structure for segmented removal in a deep foundation pit adjacent to a building, comprising a foundation pit, and support piles are installed on the inner wall of the foundation pit; a basement raft and a cap are provided in the foundation pit, and the cap is supported on the lower part of the basement raft; and a spacing is arranged between the side of the basement raft and the support piles;

[0005] A cast force transfer belt is provided between the side of the basement raft slab and the supporting piles. The cast force transfer belt is cast and formed by concrete with the same grade as the basement raft slab. The cast force transfer belt connects the side of the basement raft slab and the supporting piles.

[0006] Optimized, the supporting structure in the deep foundation pit of the above-mentioned adjacent building is dismantled in sections, and the force transfer belt is cast and formed as a whole with the basement raft slab.

[0007] Optimized, the supporting structure in the deep foundation pit adjacent to the above-mentioned building is dismantled in sections, part of the upper surface of the pedestal is supported on the bottom of the basement raft slab, and part of the upper surface of the pedestal is supported on the bottom of the cast force transfer belt.

[0008] Optimized, the supporting structure in the deep foundation pit adjacent to the building is dismantled in sections, the basement outer wall is constructed on the basement raft, and the basement outer wall is spaced apart from the supporting piles; there is backfill soil between the basement outer wall and the supporting piles and the inner wall of the foundation pit.

[0009] Optimized, the supporting structure in the deep foundation pit adjacent to the building is dismantled in sections, and the top of the backfill soil is provided with a concrete short support block, and the two ends of the concrete short support block are respectively in contact with the supporting piles and the outer wall of the basement.

[0010] The beneficial effects of this application are:

[0011] In the technical solution of the present application, by setting short concrete braces at the nodes of the vertical and horizontal walls of the structure, setting raft slab force transmission belts, and partially backfilling the structure, the supporting effect of the main structure on the foundation pit is fully utilized, the number of steel diagonal braces is greatly reduced, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram of the internal structure of the foundation pit when pouring the force transfer belt in this application;

[0013] Figure 2 This is the internal structure diagram of the foundation pit during the concrete short support in this application. DETAILED DESCRIPTION

[0014] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] The present application provides a support structure for segmented removal of supports in a deep foundation pit adjacent to a building, wherein the main support structure includes a cast force transfer belt 4, backfill soil 6, and concrete short support blocks 7, which are combined with a pedestal 2, a basement raft 3, and a basement outer wall 5 of the main structure in the foundation pit 1 to support the foundation pit 1. After the internal support 102 of the foundation pit 1 is removed, deformation and displacement of the foundation pit 1 are avoided, thereby reducing settlement and deformation of the building adjacent to the foundation pit 1.

[0016] In the present application, support piles 101 are installed on the inner wall of the foundation pit 1. The support piles 101 can be steel structure piles or concrete piles. The support piles 101 are placed vertically and supported on the inner wall of the foundation pit 1. Two adjacent support piles 101 can be fitted or spaced apart. In order to maintain the support effect of the support piles 101, internal supports 102 are provided to support the support piles 101. After the underground buildings in the foundation pit 1 are built, the internal supports 102 may affect the construction of the underground buildings in the foundation pit 1, and the internal supports 102 need to be removed. However, after the internal supports 102 are removed, the support piles 101 may reduce the support effect on the foundation pit 1 due to lack of support. Therefore, in the present application, before removing the internal supports 102, casting force transmission belts 4, backfill soil 6, and concrete short support blocks 7 are provided to ensure the support effect.

[0017] The basement raft 3 and the cap 2 are the main parts of the basement building in the foundation pit 1. The cap 2 is supported on the lower part of the basement raft 3. The side of the basement raft 3 and the supporting piles 101 are arranged at intervals. There is a casting force transfer belt 4 between the side of the basement raft 3 and the supporting piles 101. The casting force transfer belt 4 is cast and formed by concrete casting with the same grade as the basement raft 3. The casting force transfer belt 4 connects the side of the basement raft 3 and the supporting piles 101.

[0018] The force transfer belt 4 can be cast separately after the basement raft 3 is cast, or the force transfer belt 4 can be cast together with the basement raft 3 when the basement raft 3 is cast. The force transfer belt 4 is used to connect the basement raft 3 and the support pile 101 into an integral force-bearing structure, so as to support the support pile 101.

[0019] Part of the upper surface of the cap 2 is supported on the bottom of the basement raft 3, and part of the upper surface of the cap 2 is supported on the bottom of the cast force transfer belt 4. The basement raft 3 and the cast force transfer belt 4 are supported from the bottom by the cap 2 to ensure the support strength and connection strength of the basement raft 3 and the cast force transfer belt 4.

[0020] The basement outer wall 5 is constructed on the basement raft 3, and the basement outer wall 5 is spaced apart from the supporting piles 101. There is backfill soil 6 between the basement outer wall 5, the supporting piles 101, and the inner wall of the foundation pit 1. The backfill soil 6 is filled between the basement outer wall 5 and the supporting piles 101, and between the basement outer wall 5 and the inner wall of the foundation pit 1 to support the inner wall of the foundation pit 1 and reduce the cantilever height of the supporting piles 101 after the inner support 102 is removed.

[0021] The top of the backfill soil 6 is provided with a concrete short support block 7 , and both ends of the concrete short support block 7 are in contact with the support pile 101 and the basement outer wall 5 respectively.

[0022] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A support structure for segmented removal in a deep foundation pit adjacent to a building, comprising a foundation pit (1), support piles (101) installed on the inner wall of the foundation pit (1); a basement raft (3) and a cap (2) are provided in the foundation pit (1), the cap (2) is supported on the lower part of the basement raft (3); a space is provided between the side of the basement raft (3) and the support piles (101); the characteristics are: A cast force transfer belt (4) is provided between the side of the basement raft slab (3) and the supporting piles (101). The cast force transfer belt (4) is cast and formed by concrete of the same grade as the basement raft slab (3). The cast force transfer belt (4) is connected to the side of the basement raft slab (3) and the supporting piles (101).

2. The support structure for segmented removal of support in a deep foundation pit adjacent to a building according to claim 1, characterized in that: The casting force transmission belt (4) and the basement raft slab (3) are cast and formed in one piece.

3. The support structure for segmented removal of support in a deep foundation pit adjacent to a building according to claim 1, characterized in that: Part of the upper surface of the cap (2) is supported on the bottom of the basement raft (3), and part of the upper surface of the cap (2) is supported on the bottom of the casting force transmission belt (4).

4. The support structure for segmented removal of support in a deep foundation pit adjacent to a building according to claim 1, characterized in that: A basement outer wall (5) is constructed on the basement raft slab (3), and the basement outer wall (5) is spaced apart from the supporting piles (101); backfill soil (6) is provided between the basement outer wall (5), the supporting piles (101) and the inner wall of the foundation pit (1).

5. The support structure for segmented removal of support in a deep foundation pit adjacent to a building according to claim 4, characterized in that: The top of the backfill soil (6) is provided with a concrete short support block (7), and the two ends of the concrete short support block (7) are respectively in contact with the support pile (101) and the basement outer wall (5).

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