Relying on a semi-circular deep foundation pit project in Suzhou,the project needs to go through the tunnel in the late stage,in the selection process of support,the tunnel area adopts the recoverable CSM method piles and increases the spacing of the support arrangement in the underpass area,and the rest of the area adopts the grouted piles and tri-axial water curtain,numerical simulation analysis of the whole process of excavation of the foundation pit and on-site monitoring.The results show that the"umbrella-type"support can make full use of the arch effect of the semi-circular pit,and the pit support system is characterized by small deformation in the arc area and large deformation in the straight side,and the deformation in the straight side area is about 12.5％larger than that in the arch area,so it can better control the impact on the pit itself and the surrounding environment.
关键词
粉土/半圆深基坑/临轨/拱效应/"伞形"支撑/变形监测/风险预警/稳定性
Key words
silty soil/semi-circular deep foundation pit/adjacent to track/arch effect/"umbrella-type"support/deformation monitoring/risk early warning/stability
维普
万方数据