咬合桩在紧邻地铁基坑工程清障中的设计与应用

Design and Analysis of Secant Pile in Clearing Obstacles of Foundation Pit Adjacent to Metro Tunnels

以软土地区的某紧邻地铁基坑工程为背景,针对先施工的顶管工作井深入拟建地下室内部,分析了本工程地下清障中面临的相关技术难点。通过项目实施过程中的监测情况表明,采用全回转钻机施工咬合桩,将清障和基坑围护施工相结合,保证了运营地铁区间隧道的安全,经济效益和环境效益良好。

Based on the background of a subway foundation pit project in soft soil area,aiming at the construction of pipe jacking well in the proposed basement,this paper analyzes the related technical difficulties in the underground obstacle removal of the project.Through the monitoring during the implementation of the project,it is shown that the use of the rotary drilling machine to construct the bite pile,the combination of the barrier clearing and the foundation pit support construction,ensures the safety of the operation of the subway tunnel,and the good economic and environmental benefits.