深大基坑开挖对既有地铁结构的影响分析

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【摘    要】：针对深大基坑施工对既有地铁结构安全的影响问题，以实际工程为例，通过理论分析与三维数值模拟，分析基坑开挖对既有地铁结构的影响。结果表明：基坑开挖将导致地铁结构产生变形和不均匀沉降，须严格按设计方案施工并采取可靠的施工方案方能保证既有结构的安全。

【关键词】：基坑；地铁；结构安全

【中图分类号】：TU753 【文献标志码】：C 【文章编号】：1008-3197（2024）02-66-04

【DOI编码】：10.3969/j.issn.1008-3197.2024.02.017

Analysis of the Influence of Deep and Large Foundation Pit Excavation on the Existing Subway Structure

SUN Shichen

（Tianjin Municipal Engineering Design and Research Institute ，Tianjin 300392，China）

【Abstract】： In view of the influence of deep and large foundation pit construction on the safety of existing subway structures， this paper takes the actual project as an example， analyzing the influence of foundation pit excavation on existing subway structures through theoretical analysis and three-dimensional numerical simulation.The results show that the excavation of foundation pit will cause deformation and non-uniform settlement of subway structure.Therefore， only by strictly following the design plans and adopting reliable methods during construction can the safety of existing structures be guaranteed.

【Key words】：foundation pit; subway; structural safety

随着我国轨道交通建设的发展，工业、民用建筑基坑邻近既有地铁结构施工的情况越来越多。（剩余2608字）