Safe stress conversion construction method for improvement on main structure of subway station

Abstract

The invention discloses a safe stress conversion construction method for the improvement on a main structure of a subway station. The safe stress conversion construction method comprises the following steps: the first step is construction of a novel underground diaphragm wall; the second step is broadening construction, wherein a top plate, a middle plate and a bottom plate are respectively broadened from top to bottom, the top plate, the middle plate and the bottom plate all need broadening, and the broadening construction method of the top plate, the broadening construction method of the middle plate and the broadening construction method of the bottom plate are the same; an actual broadening construction process comprises broadening segment division, first-stage broadening segment broadening and second-stage broadening segment broadening; the third step is construction of a novel side wall, wherein a second left side wall and a second right side wall are constructed on the left side and the right side of the multiple broadened plates respectively after broadening construction in the second step is completed. According to the safe stress conversion construction method for the improvement on the main structure of the subway station, the steps are simple, the design is reasonable, implementation is convenient, investment cost is low, construction progress is fast, the construction effect is good, and the improvement process of the main structure of the subway station can be completed simply, conveniently and quickly.

Description

technical field [0001] The invention belongs to the technical field of reconstruction of the main structure of a subway station, and in particular relates to a construction method for safe stress conversion for the reconstruction of the main structure of a subway station. Background technique [0002] When constructing deep foundation pits of subway stations, the construction method of underground diaphragm walls is usually used for construction. During the construction of a new subway, it is usually necessary to renovate the existing subway line. For example, when it is necessary to renovate one station and one section of the existing subway line, due to the adjustment of the section line, it is objectively required to modify the structure of the original subway station. Widen and renovate to meet the needs of structural boundaries. The reconstruction of the station structure needs to partially destroy the original station structure first, and then expand the width to the ...

AI Technical Summary

Problems solved by technology

During the actual widening and reconstruction construction, the reconstruction construction is carried out according to the method of cover-excavation, and the transformation of the stress system is complicated, especially when the excavation depth is relatively large (the excavation depth of the station reaches 23m), the transformation of the stress system is more complicated

During the excavation process, the enclosure structure must be supported, but when the cover-excavation method is used for constr

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