复杂环境下地铁车站超深基坑工程设计与实践  

Design and Practice of Ultra-deep Foundation Pit in Subway Station under Complex Environment

作　　者：杨自刚 YANG Zi-gang(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《价值工程》2024年第16期70-72,共3页Value Engineering

摘　　要：以成都轨道交通13号线一期工程新南门站超深基坑工程为背景,运用有限元程序分析研究了复杂环境下超深基坑施工周边建筑物的变形特征,并辅以现场实测手段验证,研究结果表明:由于基坑开挖卸荷,坑周土体及建筑物产生偏向基坑侧变位,变形极值均小于建筑物变形控制值,因此,基于坑外降水条件下的旋挖灌注桩+内支撑的支护形式方案合理可行且安全可靠,可为后续类似复杂环境下地铁车站超深基坑工程提供有益借鉴。The ultra-deep foundation pit project of Xinnanmen Station in the first phase of Chengdu Rail Transit Line 13 is taken as the background,the deformation characteristics of buildings surrounding ultra-deep foundation pit construction in complex environment are analyzed and studied by finite element program,and verified by field measurement.The results show that due to the excavation unloading of foundation pit,the soil and building around the pit have displacement to the foundation pit side,and the extreme deformation value is less than the control value of building deformation.Therefore,based on the conditions of precipitation outside the pit,the support scheme of rotary excavation pile+internal support is reasonable,feasible,safe and reliable,which can provide useful reference for the underground station ultra-deep foundation pit engineering in similar complex environment.

关 键 词：复杂环境 地铁车站 超深基坑 建筑物沉降变形 

分 类 号：U213.1[交通运输工程—道路与铁道工程]