水文地质工程地质2025，Vol.52Issue(2)：114-124,11.DOI:10.16030/j.cnki.issn.1000-3665.202312034
地表堆载作用下盾构隧道结构变形规律及安全控制限值
Deformation and safety control limits of shield tunnel under surface loading effects
摘要
Abstract
Surface loading is a primary cause of damage to underground shield tunnel segments,leading to issues such as cracking,joint opening,and misalignment.These damages pose significant challenges to the safe operation of shield tunnels.Previous studies often focused on specific loading modes and have not adequately addressed the mechanical interactions between segment joints during analysis.Therefore,this study utilized ABAQUS finite element software to construct a multi-scale refined three-dimensional finite element model containing segments,bolts,and soil layers.The model accounts for the material nonlinearity of tunnel segments and bolts,as well as the complex interaction between tunnel segments and soil.Through simulation analysis of full-scale segment loading model tests,the accuracy and reliability of the adopted tunnel segment model were verified.Using the established three-dimensional refined model,numerical simulation were then conducted to analyze the effects of different loading magnitudes and forms(including central loading,semi-eccentric loading,and eccentric loading)on underground segment structures.The results show that under surface loading,the longitudinal settlement deformation of shield tunnels exhibits discontinuity and non-uniformity.The settlement within the range of surface loading is relatively large,with greater misalignment and opening at the edges of the loading.A comprehensive analysis of the relationship between tunnel structure deformation,opening amount,and misalignment under different loading forms was conducted,and then the relationship between the opening amount of shield tunnel segments and structural deformation and convergence rate was obtained.The proposed formulas can provide valuable insights for engineering applications.关键词
地表堆载/盾构隧道/精细化建模/数值模拟/安全限值Key words
ground surface surcharge/shield tunnel/refined modeling/numerical simulation/safety control limits分类
交通工程引用本文复制引用
卞荣,吴冰,孙永军,翁天赐,熊勇林..地表堆载作用下盾构隧道结构变形规律及安全控制限值[J].水文地质工程地质,2025,52(2):114-124,11.基金项目
国网浙江省电力有限公司科技项目(5211JY220008) （5211JY220008）
