西南交通大学学报2025，Vol.60Issue(2)：271-281,11.DOI:10.3969/j.issn.0258-2724.20220850
基坑开挖对邻近既有道路影响的两阶段分析法
Two-Stage Analysis Method for Influence of Foundation Pit Excavation on Adjacent Existing Roads
摘要
Abstract
To address the issue of settlement and cracking of adjacent roads during the excavation of urban foundation pits,the research object was extended from a one-dimensional structure to a two-dimensional structure based on the Winkler theory.Firstly,a calculation model for the settlement field caused by foundation pit excavation was established,and the control equation for road flexural deformation was derived.Secondly,a two-stage analysis method was adopted by considering factors of foundation pit excavation depth,aspect ratio,support stiffness,and thickness of soft soil layer above the pit bottom,so as to provide a correction formula for settlement field caused by foundation pit excavation and a method for predicting maximum surface settlement.Thirdly,the settlement field was substituted into the control equation for road flexural deformation,and a fourth-order nonlinear partial differential equation was solved by using the finite difference method.Finally,the above road calculation and analysis model under the condition of foundation pit excavation was verified by an engineering example.By comparing the field monitoring data with the theoretical solution and numerical simulation,it was found that the errors in road settlement were 15%and 8.3%,respectively,both of which are within acceptable limits,thereby confirming the reliability of the road calculation and analysis model proposed in this study under the condition of foundation pit excavation.关键词
基坑开挖/Winkler地基梁/土与结构相互作用/路面沉降Key words
foundation pit excavation/Winkler foundation beam/soil-structure interaction/pavement settlement分类
建筑与水利引用本文复制引用
张坤勇,李俊吉,张弛,李福东,朱诚..基坑开挖对邻近既有道路影响的两阶段分析法[J].西南交通大学学报,2025,60(2):271-281,11.基金项目
国家自然科学基金项目(41530637) （41530637）
