华侨大学学报（自然科学版）2025，Vol.46Issue(3)：264-271,8.DOI:10.11830/ISSN.1000-5013.202411014
基坑开挖引起地下连续墙水平位移与地表沉降数值模拟
Numerical Simulation on Horizontal Displacement of Diaphragm Wall and Surface Settlement by Foundation Pit Excavation
摘要
Abstract
To accurately analyze the horizontal displacement of the diaphragm wall and surface settlement,a systematic study on the deformation of the foundation pit was conducted using numerical simulation combined with field measurement method.A 3-dimensional finite element model of the foundation pit excavation was es-tablished,adopting a modified Cambridge constitutive model to calculate the horizontal displace-ment of the diaphragm wall and the surface settlement outside the pit by the foundation pit excavation.The Pasternak 2-parameters model was introduced,the bending differential equation was derived,the finite difference method was used to calculate the horizontal displacement of the diaphragm wall.The numerical simulation results were compared with the field measurement data and the theory calculation results to verify the numerical simulation.The numerical simulation method was used to further investigate the influence of the diaphragm wall and inter-nal supports,etc on horizontal displacement and surface settlement.The research results show that increasing the thickness of the diaphragm wall,the elastic modulus of the diaphragm wall,steel support diameter could effectively reduce the horizontal displacement of the diaphragm wall and surface settlement.The deformation of the foundation pit exhibits significant spatial effects,within 20 m from the corner of the pit,the horizontal dis-placement of the diaphragm wall and surface settlement increase with the distance from the corner of the pit;within 20-100 m,the horizontal displacement and surface settlement remain unchanged.关键词
基坑工程/三维有限元模型/地下连续墙水平位移/地表沉降/修正剑桥本构模型Key words
foundation pit engineering/3-dimensional finite element model/horizontal displacement of dia-phragm wall/surface settlement/modified Cambridge constitutive model分类
土木建筑引用本文复制引用
李坤鹏,陈士海,叶刚楠,陈韦羽,陈建福..基坑开挖引起地下连续墙水平位移与地表沉降数值模拟[J].华侨大学学报（自然科学版）,2025,46(3):264-271,8.基金项目
福建省住建行业科技计划项目(2022-K-292) （2022-K-292）
