Influence and Safety Evaluation of Underground Structure Construction on Adjacent Existing Subway Section
王星 WANG Xing；李明君 LI Ming-jun
（中铁第六勘察设计院集团有限公司，天津 300308）
（China Railway Liuyuan Group Co.，Ltd.，Tianjin 300308，China）
摘要：近年来随着地铁及地下综合管廊的快速发展，工程建设中经常会碰到地下构筑物与既有地铁区间结构的近接施工问题。新修建的地下构筑物在施工期间对周围地层产生新的扰动，容易引起近接既有隧道结构的附加位移变形和内力变化，进而导致安全事故。因此针对这种新建工程对既有地铁结构的近接影响分析和安全性评价显得尤其重要。本文以某城市新建地下电力管廊与既有地铁区间近接施工为工程案例，采用三维数值手段分析了近接施工对既有隧道结构的影响，经过变形理论的预测、内力分析及承载力验算，对既有结构的安全性评价做出了判断，并提出了一些施工安全保护建议，对类似近接工程具有一定的借鉴和参考。
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.
关键词：地下构筑物；近接；影响；地铁；安全评价
Key words: underground structure；adjacent；influence；subway；safety evaluation
DOI:10.3969/j.issn.1006-4311.2022.18.023.
文章出处：王星,李明君. 地下构筑物施工对近接既有地铁区间的影响及安全评价[J]. 价值工程,2022,41(18):70-74.
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