复杂环境及地质条件下超深基坑开挖及支护施工工艺研究

Research on Excavation and Support Construction Technology of Ultra Deep Foundation Pit under Complex Environment and Geological Conditions

以合肥市轨道交通6号线丰乐河路站—蜀山南站区间风井施工为例,该区间风井深度深,周边环境复杂且所处地区为软弱地质,风井基坑的开挖及支护施工难度大,对周边环境影响大,施工安全风险高,为确保该风井基坑的施工安全,减少对周边环境的影响,项目部对基坑施工方案进行认真规划,通过一系列举措,对基坑开挖及支护工艺进行严格把控,减少了基坑周边位移,保证了基坑的施工安全,降低了对周边环境的影响,加快了施工进度,缩短了施工工期,同时研究成果也可为后续类似施工提供借鉴。

Taking the construction of the air shaft between Fenglehe Road station and Shushan South Station of Hefei rail transit line 6 as an example,the air shaft is deep,the surrounding environment is complex and the area is weak geology,it is difficult to excavate and support the foundation pit of the air shaft,which has great influence on the surrounding environment and high construction safety risk,the project department carefully plans the construction plan of the Foundation Pit,and through a series of measures,strictly controls the excavation and supporting technology of the foundation pit,reduces the displacement around the foundation pit,and ensures the construction safety of the foundation pit,it reduces the influence on the surrounding environment,speeds up the construction progress,shortens the construction period,and the research results can also provide reference for the following similar construction.