群基坑对地铁深基坑影响研究  

Research on the impact of group foundation pits on subway deep foundation pits

作　　者：周庙林 ZHOU Miaolin(Nantong Rail Transit Group Co.,Ltd,Nantong Jiangsu 226300,China)

机构地区：[1]南通轨道交通集团有限公司,江苏南通226300

出　　处：《中国安全生产科学技术》2024年第S1期208-212,共5页Journal of Safety Science and Technology

摘　　要：为了解决城市建设发展中地下工程交叉建设对地铁施工产生的影响问题,减少群深基坑工程对地铁结构的安全影响。通过有限元软件分析的方法,对周边群基坑不同施工阶段对地铁深基坑的实例进行建模分析,现场监测数据来验证计算的准确性。研究结果表明:群基坑变形符合典型基坑变形沉降规律,影响宽度约1.5~2倍基坑深度范围;周边群基坑会对地铁周边地表沉降存在叠加效应、围护结构的形变互相影响的情况。研究结果可为类似项目围护结构设计提供借鉴,并为施工单位监测初始值建立、基坑变形规律提供有益参考。In order to address the impact of cross construction of underground engineering on subway construction in urban development and reduce the safety impact of group deep foundation pit engineering on subway structures,by using finite element software analysis,this study conducts modeling analysis on examples of subway deep excavations in different construction stages of surrounding group excavations,and verifies the accuracy of the calculations using on⁃site monitoring data.The research results indicate that the deformation of the group foundation pit conforms to the typical deformation and settlement law of the foundation pit,affecting a width range of about 1.5 to 2 times the depth of the foundation pit;the surrounding group foundation pit will have a cumulative effect on the surface settlement around the subway,and the deformation of the enclosure structure will affect each other.The research results can provide reference for the design of enclosure structures in similar projects,and provide useful references for construction units to establish initial monitoring values and deformation laws of foundation pits.

关 键 词：群基坑 数值分析 地面沉降 围护结构变形 监测初始值 

分 类 号：TU753[建筑科学—建筑技术科学] U231.3[交通运输工程—道路与铁道工程]