Annular brace support construction method of basement

Abstract

The invention discloses an annular brace support construction method of a basement. The method is characterized by comprising the construction steps of (1) constructing a retaining wall; (2) constructing a support post; (3) manufacturing a first layer of annular outer brace, a first layer of annular inner brace, a concrete truss web member and a first layer of top brace; (4) cutting earth to a bottom elevation part of a second layer of annular brace, manufacturing the second layer of an annular bracket, pouring a concrete slab and finally manufacturing a second layer of top brace; (5) cutting earth to 10cm below the bottom elevation of a bottom plate of the basement, manufacturing a plain concrete cushion layer and pouring concrete of the bottom plate of the basement; (6) exploding the second layer of annular brace, the concrete slab and the second layer of top brace and then dismantling the support post after explosion is completed; (7) pouring a second layer top plate of the basement; (8) exploding the first layer of annular outer brace, the first layer of annular inner brace, the concrete truss web member and the first layer of top brace; and (9) pouring a first layer of top plate of the basement.

Description

technical field [0001] The invention relates to a support construction method, in particular to a basement annular support construction method. Background technique [0002] In the basement support system, the internal support structure has the characteristics of safety, reliability, and economical rationality, and is widely used in foundation pit engineering. However, the internal support provided by the conventional support method causes great inconvenience to the excavation of basement earthwork and the construction of underground structures, resulting in consequences such as prolonged construction period and poor economic efficiency. Using ring support instead of the support structure system of the conventional support method can obtain higher economic benefits. However, when the ring support is excavated deeply in the basement, especially when there are multiple supports, the lateral pressure on the first ring support usually exceeds the ultimate compressive strength o...

AI Technical Summary

Problems solved by technology

However, when the ring support is excavated deeply in the basement, especially when there are multiple supports, the lateral pressure on the first ring support usually exceeds the ultimate compressive strength of the concrete, and the ring support will experience excessive displacement, cracking and other defects in the ring support concrete. Phenomenon

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