岩土工程学报2025，Vol.47Issue(z2)：1-6,6.DOI:10.11779/CJGE2025S20027
基坑连续破坏对邻近盾构隧道影响研究
Impact of progressive foundation pit failures on adjacent shield tunnels
摘要
Abstract
The mechanisms and associated issues pertaining to catastrophic failures induced by pit collapse on adjacent existing tunnels require urgent in-depth investigation.This study investigates the impact of pit collapse on adjacent shield tunnel structures,with particular emphasis on establishing a numerical model based on the Coupled Eulerian-Lagrangian(CEL)method to examine the effects on different tunnel structural components under varying spatial configurations.Key findings reveal that:1)Following localized failure of foundation pits,the load pattern of the adjacent tunnel structure changes,the internal forces of some joints in the tunnel structure exceed their corresponding bearing capacities,thereby compromising structural integrity;2)Tunnel structural safety exhibits inverse proportionality to pit-tunnel proximity and direct proportionality to burial depth reduction,with bottom-positioned joints demonstrating the most severe performance degradation;3)Practical mitigation strategies should focus on interrupting adverse effect transmission pathways through soil reinforcement or isolation measures implementation.关键词
基坑破坏/盾构隧道/耦合欧拉-拉格朗日方法/影响规律Key words
pit failures/shield tunnel/Coupled Eulerian-Lagrangian(CEL)method/influenced mechanisms分类
建筑与水利引用本文复制引用
郑刚,韩思佳,孙基斌,程雪松,刘永超,张雁,任东帅,骆天逸..基坑连续破坏对邻近盾构隧道影响研究[J].岩土工程学报,2025,47(z2):1-6,6.基金项目
国家重点研发计划项目(2023YFC3009300) （2023YFC3009300）
中国博士后科学基金第5批特别资助(站前)项目(2023TO0241) （站前）
