相邻深基坑的连续墙受力数值分析与现场测试

以深圳地铁车公庙枢纽11号线车站基坑与换乘大厅基坑的地下连续墙为例,分析连续墙在开挖过程中的受力规律.在地下连续墙内埋置了混凝土应变计,对两基坑施工全过程的受力情况进行了现场测试,并对连续墙的安全性进行了评价.结合有限元软件ABAQUS进行分析,结果显示,共用连续墙受紧邻基坑开挖的影响明显,内力变化较大,而非共用连续墙受紧邻基坑开挖的影响较小,可以忽略.测试结果为深圳地区地铁车站工程建设提供参考.

Numerical Analysis and Field Measurement of Force on Diaphragm Walls in Adjacent Deep Excavations

This paper focused on the study of shared diaphragm walls in the foundation pits of Chegongmiao station of Shenzhen subway line 11. During the study， typical tested section was selected， and concrete strain meters were embedded so as to carry out internal force test for diaphragm walls. Stability of the station structure was evaluated. The ABAQUS software was used to analyze it， and shared diaphragm walls were affected greatly by construction of adjacent excavation， and internal forces varied significantly， while other diaphragm walls were affected slightly by construction of adjacent excavation， and the effect could be ignored. In the end， it provides a reference for the construction of subway station in Shenzhen area.