基于坑角效应弱化围护结构深基坑地表沉降变形分析  

Analysis on the Subsidence Deformation of Deep Excavation Project with Weakening Retaining Structure Considering the Pit-angle Effect

作　　者：郑军 余振锡 李栋 ZHENG Jun;YU Zhen-xi;LI Dong(School of Architecture and Engineering,Anhui University of Technology,Ma’anshan,243002,Anhui)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243002

出　　处：《蚌埠学院学报》2023年第5期102-108,共7页Journal of Bengbu University

基　　金：安徽省住房城乡建设科学技术计划项目(2022-YF090)。

摘　　要：坑角效应作用范围内,围护结构可以相互约束限制变形,但能否利用该效应进一步弱化坑角处围护结构的相关参数,目前没有研究成果明确之。以某地铁深基坑工程为研究背景,采用现场监测和数值模拟两种方法进行对比分析,结果表明:在坑角效应范围内,适当弱化围护结构的嵌固深度、厚度和弹性模量,并不会明显增加深基坑地表的沉降变形量。这一研究成果将为深基坑工程建设过程中追求经济和安全理念提供理论依据和参考。Within the scope of the pit-angle effect,the envelope structure is constrained to limit the deformation.Whether the related parameters of the envelope structure of the pit corner can be weakened by using the effection or not,there were any research findings to prove it.In this paper,a subway deep excavation project was taken as an example,and the influence of the weakened envelope structure on the subsidence deformation of the deep excavation project was studied by the ways of the field testing and numerical simulation.The results show the embedded depth,the thickness,and the elasticity modulus of the envelope structure can be weakened,and the subsidence deformation of the deep excavation project with weakening envelope structure is not significantly increased,considering the pit-angle effect.The results of this study will provide theoretical basis and reference for the economic and safe construction of the excavation project.

关 键 词：坑角效应 地表沉降 弱化参数 现场监测 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]