智能城市2025，Vol.11Issue(4)：14-17,4.DOI:10.19301/j.cnki.zncs.2025.04.004
基坑开挖对既有下卧隧道的影响机理分析及数值模拟研究
Research on influence mechanism analysis and numerical simulation of foundation pit excavation on existing underground tunnels
许亚强 1张志彪 1田鹏 1陈思宇1
作者信息
- 1. 中信清水入江(武汉)投资建设有限公司,湖北 武汉 430200
- 折叠
摘要
Abstract
The excavation of deep foundation pit will produce unloading effect,which will have an adverse effect on the adjacent existing tunnels.In order to explore the influence of foundation pit excavation on tunnel stress deformation,this paper selects a foundation pit project located directly above the subway,and uses large-scale finite element software to simulate and analyze the foundation pit excavation process and its possible impact.The model uses the Moore Coulomb constitutive relationship to describe the mechanical properties of the soil,uses the diaphragm wall to simulate the supporting structure of the foundation pit,and the friction contact conditions are set between the diaphragm wall and the soil,and the excavation process of the foundation pit is simulated by removing the life and death elements,and the stress and displacement changes of the tunnel and the foundation pit when the excavation depth h and the distance between the bottom of the diaphragm wall and the top of the tunnel l are considered.关键词
基坑开挖/隧道/有限元分析/竖向变形Key words
foundation pit excavation/tunnel/finite element analysis/vertical deformation分类
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许亚强,张志彪,田鹏,陈思宇..基坑开挖对既有下卧隧道的影响机理分析及数值模拟研究[J].智能城市,2025,11(4):14-17,4.
