紧临地铁的顶管工作竖井深基坑支护设计方案

Design Scheme of Working Shaft Retaining Structure of Pipe Jacking Which is Beside Metro Tunnel

作为非开挖顶管技术唯一需要开挖的分项工程,工作竖井的基坑很大程度上决定着整个工程的工期。基于某城区内3.0m内径长距离顶管工程的竖井需求,介绍在以滨海淤积相淤泥层和粉质粘土层中,紧邻地铁区间和地下管线的竖井基坑支护设计方案,通过优化采用排桩支挡围护,明挖顺作施工。设计方案为相应工程的建设提供依据,也为类似工程的设计与施工提供参考。

As the only part has to be excavate in the pipe jacking project, the working shaft would determinate the whole project construction period.Base on a pipe jacking project with 3.0m inter-meter in downtown, this paper introduces the design scheme of a pipe jacking working shaft in the geology condition with clay and silty clay, which is beside the metro tunnel and underground pipes.The soldier pile wall is applied n that shaft, and that scheme is indicated the shaft design and construction, which provide references for similar construction.