摘要
受地铁安全运营的限制,紧邻地铁隧道基坑变形控制非常严格。以紧邻地铁盾构隧道的某基坑工程为例,分析了基坑支护的重点、难点,提出了两套基坑支护方案,并采用平面应变渗流耦合有限元法分别进行了仿真模拟,通过对比计算确定最终方案付诸实施。通过计算结果与实测数据的对比,验证了计算方法的可靠度。
Strict deformation control was applied to a deep excavation near an active shielded metro tunnel due to the safety con-cern of the metro operation. This paper presents the analytical results of this large depth deep excavation with a concentrationon the important and difficult issues. Two different excavation support systems are proposed. The process of the excavationwas simulated by using Finite Element Analysis considering the plane strain coupled with seepage. The final selected supportingsystem was based on the comparative studies of both systems. The predicted data are comparable with the observed data duringthe construction.
出处
《土工基础》
2014年第3期23-26,共4页
Soil Engineering and Foundation
关键词
地铁隧道
深基坑
有限元法
应变渗流耦合
Metro Tunnels
Deep Excavations
Finite Element Method
Plane Strain Coupled Seepage
