摘要
长江航运总医院基坑工程位于地铁区间隧道上方,坑底距离左线隧道最小距离9 m,平面距隧道中线9 m内不可布桩。探讨了采用灌注桩-转换大梁基础方案的可行性,并基于二维有限元法针对多个施工步骤模拟基坑开挖的全过程,分析了各开挖阶段隧道的变形及受力特性。
The foundation pit of Changhang Hospital is located above the metro tunnel. The minimum distance between the pit bottom and the left tunnel is 9 meters. It is not allowed to arrange piles within 9 meters between the plane and the center line of tunnel. In this paper,the possibility to adopt the cast-in-situ piles and large transfer beams was discussed,the whole process of foundation pit excavation in view of several construction procedures was simulated based on the two-dimensional finite element method,and the deformation and mechanical behavior of tunnels at each excavation stage were analyzed.
作者
葛畅
Ge Chang(No. 4 Architecture Design Institute, Tongji Architectural Design （Group） Co. , Ltd. , Shanghai 20009)
出处
《工程建设》
2018年第6期24-27,共4页
Engineering Construction
关键词
基坑开挖
既有地铁隧道
有限元分析
变形
foundation pit excavation
existing subway tunnel
finite element analysis
deformation
