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Influence and Safety Evaluation of Underground Structure Construction on Adjacent Existing Subway Section

WANG Xing, LI Ming jun

Article ID: 2587
Vol 2, Issue 2, 2022

DOI: https://doi.org/10.54517/vfc.v2i2.2587
VIEWS - 2570 (Abstract)

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Abstract

In recent years, with the rapid development of subway and underground comprehensive pipe corridor, the problem of close connection between underground structure and existing subway section structure is often encountered in engineering construction. During construction, the newly built underground structure will disturb the stratum, easily cause the additional displacement deformation and internal force change of the existing tunnel structure, and then lead to safety accidents. Therefore, it is particularly important to analyze the influence and safety evaluation of the new construction on the existing subway structure. This paper takes the construction of new underground power pipe gallery close to the existing subway section as an engineering case. The influence of adjacent construction on the existing structure is analyzed by three-dimensional finite element method, and then the safety of the existing structure is evaluated through deformation prediction, internal force analysis and bearing capacity checking calculation, and some construction safety protection suggestions are put forward. It has a certain reference for similar proximity projects.

Keywords

Underground structure; Adjacent, Influence; Subway; Safety evaluation.

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