螺旋钢管桩支护在超大超深基坑中的应用

Application of Spiral Steel Pipe Pile Support in Super Large and Deep Foundation Pit

本文主要介绍了在合九联络线引江济淮特大桥部分超大超深基坑施工时,针对施工所处区域的地质地形条件,通过采用螺旋钢管桩对基坑进行支护,从而很好解决了超大超深基坑在开挖过程中及开挖后周边地质下沉或位移超限的难题,不但保证了基坑的整体稳定性,还使得基坑内部作业环境安全可控。该施工方法也为类似施工提供了一种解决思路。

This paper mainly introduces the construction of super large and deep foundation pit of Yangtze River-Huaihe River Super-large Bridge in Hefei-Jiujiang Contact Line.In view of the geological and topographical conditions of the construction area,the spiral steel pipe pile is used to support the foundation pit,so as to solve the problem of geological subsidence or displacement overrun in the process of excavation and after excavation of super large and super deep foundation pit.It not only ensures the overall stability of the foundation pit,but also makes the internal working environment of the foundation pit safe and controllable.This construction method also provides a solution for similar construction.