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Foundation pit supporting structure and earth excavation construction method

A foundation pit support and earthwork excavation technology, which is applied in the direction of foundation structure engineering, excavation, sheet pile wall, etc., can solve the problems of cumbersome welding process, cumbersome disassembly steps, etc., to increase waterproof performance, prevent shaking, and facilitate installation Effect

Active Publication Date: 2019-08-06
SICHUAN AEROSPACE CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned welding process is relatively cumbersome, and when the foundation pit support structure is disassembled, the adjacent guard plates need to be cut to achieve separation, and the above-mentioned disassembly steps are also relatively cumbersome

Method used

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  • Foundation pit supporting structure and earth excavation construction method
  • Foundation pit supporting structure and earth excavation construction method
  • Foundation pit supporting structure and earth excavation construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a foundation pit support structure includes a foundation pit 1, cast-in-place piles 2 arranged in the surrounding soil of the foundation pit 1 and a number of support plates 3 attached to the side walls of the foundation pit 1, and the distance between the cast-in-place piles 2 and the foundation pit 1 is The distance between the inner wall of the pit is 2-3m, the cast-in-place pile 2 is a concrete structure, and the support plate 3 is made of a steel plate to ensure sufficient strength. The top of the support plate 3 is fixedly provided with a crossbeam 35, and a strut 351 is arranged between the support plates 3 of the two facing side walls of the foundation pit 1, and the two ends of the strut 351 are fixedly connected with the crossbeam 35; The setting plays the role of supporting the support plate 3 and improves the compressive capacity of the support plate 3.

[0043] Such as figure 2 , 3 As shown, the bottom wall of the foundation p...

Embodiment 2

[0054] A kind of earth excavation construction method, comprises the following steps:

[0055] S1. Excavate the side slope, and set the intercepting ditch at the top of the side slope;

[0056] S2. Excavation of earthwork. Excavation of earthwork shall be carried out by an excavator. It shall be excavated in sections, uniformly and symmetrically on the plane, and flow operation shall be carried out in vertical layers. The width of each excavation shall not be greater than 15m, and the depth of each excavation shall not be greater than 1.5m, and the excavation edge of the earthwork in the center of foundation pit 1 shall be no less than 10m from the excavation edge of the support;

[0057] S3. Construction of foundation pit 1 support structure, the support plate 3 is closely attached to the side wall of foundation pit 1, and pile holes are first excavated in the soil around foundation pit 1, the depth of the pile holes is greater than the depth of foundation pit 1, and then Th...

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Abstract

The invention relates to a foundation pit supporting structure and belongs to the technical field of building construction. The foundation pit supporting structure comprises a foundation pit, cast-in-place piles arranged in a surrounding soil body of the foundation pit, and a plurality of supporting plates attached to the side walls of the foundation pit, a plurality of anchor rods fixedly connected with the cast-in-place piles are arranged on the supporting plates in a penetrating mode, a plurality of fixing piles are fixedly arranged on the bottom wall of the foundation pit in an inserted mode side by side, fixing plates are fixedly arranged on the fixing piles, and the supporting plates and the fixing plates are fixedly connected through fixing assemblies; and clamping grooves are formed in the two sides of the supporting plates in the height direction, and clamping blocks used for being in clamped connection with the clamping grooves are formed in the two sides of the adjacent supporting plates. When the supporting plates are mounted, the clamping blocks are inserted into the clamping grooves, so that the adjacent supporting plates are fixed in a clamped connection mode, a traditional welding fixing mode is replaced, and mounting and demounting of the foundation pit supporting structure in the foundation pit are convenient especially mounting and demounting of the adjacentsupporting plates; and the supporting plates and the fixing plates are connected and fixed through the fixing assembly, and the foundation pit construction space is saved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a foundation pit support structure and an earth excavation construction method. Background technique [0002] With the continuous development of urban modernization, the requirements for the development and construction of urban space are becoming increasingly urgent, and there are more and more constructions of various underground projects. Large-scale underground projects have higher and higher requirements for deep foundation pit engineering. During the excavation of the foundation pit, the surrounding soil will inevitably be deformed, which will affect the underground pipelines of the surrounding buildings, and seriously endanger the normal use and safety of the underground pipelines. In order to avoid this situation, a foundation pit support structure will be set up in the foundation pit design and excavation construction to stabilize the safety of the foundat...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D17/04E02D5/34
CPCE02D5/34E02D17/02E02D17/04
Inventor 杨新毛安宇赵轩李建明毛荐
Owner SICHUAN AEROSPACE CONSTR ENG
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