软土地层冻结暗挖法车站施工技术

摘要:

上海轨道交通某地铁车站受地面“钉子户”建筑影响，导致局部车站主体结构无法施工。为不影响该条轨道交通线路总体规划，同时确保该“钉子户”建筑的安全，考虑到该“钉子户”建筑房龄较大且地层条件较差，经反复论证后决定“钉子户”建筑影响区域车站主体结构采用“冻结暗挖法+侧洞法+中隔壁法”联合施工法。沿受影响区域结构三边布置水平冷冻管，冷冻形成结构强度高、止水性能好的帷幕，之后采用侧洞法施工内部结构。

Abstract:

The main structure of a subway station in Shanghai rail transit can not be constructed due to the influence of ground "nail house" buildings. In order not to affect the overall planning of the rail transit line and ensure the safety of the "nail household" building, considering the large age of the "nail household" building and poor stratigraphic conditions, it is decided to adopt the combined construction method of "freezing and concealed excavation method + side hole method + partition wall method" for the main structure of the station in the area affected by the "nail household" building after repeated demonstration. Horizontal freezing pipes are arranged along the three sides of the structure in the affected area to form a curtain with high structural strength and good water stop performance, and then the side hole method is used to construct the internal structure.