基于狮子洋通道工程2号隧道分析并行基坑对邻近地铁结构的影响

Analysis on the Influence of Parallel Foundation Pit on Adjacent Subway Structure Based on 2# Tunnel of the Shiziyang Link Project

通过创建二维、三维有限元模型,分析狮子洋通道工程2号隧道基坑开挖对广州地铁18号线风井和区间的影响。验证基坑围护结构设计的合理性,分析二维模型及三维模型的差异,研究了既有结构位移同基坑开挖深度、地铁结构类型之间的关系。研究可为邻近基坑的地铁结构分析提供参考。

The influence of foundation pit excavation of 2#tunnel of the Shiziyang Link Project on air shaft and section of Guangzhou Metro Line No.18 is analyzed by creating 2D and 3D finite element model.The rationality of the design of foundation pit retaining structure is verified,the difference between 2D model and 3D model is analyzed,and the relationship between the displacement of existing structure,the excavation depth of foundation pit and the type of subway structure are studied.The research can provide reference for the analysis of subway structure adjacent to foundation pit.