浅埋暗挖地铁车站临时中隔柱法施工技术研究

Study on Construction Technology of Temporary Septal Column Method for Shallow Buried Subway Station

以重庆轨道交通9号线浅埋暗挖地铁车站为工程背景,在传统双侧壁导坑法的基础上,提出临时中隔柱法施工工艺。采用荷载结构法对临时中隔柱所承担的荷载进行分析,并根据临时中隔柱所受轴力来选择合适的支撑体系。研究成果在9号线李家坪站应用,顺利完成了施工,车站围岩变形及地表沉降较小。临时中隔柱法施工技术优化了施工工序、降低了施工成本、加快了施工进度。

In this paper,taking Chongqing Metro Line 9 shallowly buried subway station as the engineering background,based on the traditional double-side guide pit method,this paper proposed temporary septal column construction method.The load structure method is adopted to analyze the load borne by the temporary septal column and the suitable support system is selected according to the axial force of the septal septum.The research results were applied to Lijiaping Station of Line 9,and the construction was completed successfully.The surrounding rock deformation of the station and surface subsidence were relatively small.Temporary septal method construction technology optimizes the construction process,reduces construction costs and speeds up the construction schedule.