软土地区紧邻高层建筑的地下通道整体冻结暗挖变形控制

Deformation Control of Entire Frozen Excavation for Underground Passages Adjacent to High-rise Buildings in Soft Soil Areas

城市轨道交通出入口的建造受周边环境影响较大。依托上海轨道交通18号线江浦路站出入口通道工程,对软土地区异形地下通道整体冻结暗挖施工全过程进行分析,提出了富水软土地层的二次取芯穿障跟钻工艺、加强型预应力钢支撑临时支护技术、多重注浆的冻胀融沉变形控制工艺,总结的经验数据可供类似工程实施借鉴。

The construction of urban rail transit entrances and exits is greatly influenced by the surrounding environment.Therefore,based on the entrance and exit channel project of Jiangpu Road Station on Shanghai Rail Transit Line 18.The entire frozen excavation construction process for irregular underground passages in soft soil areas is analyzed.Meanwhile,the secondary core extraction and obstacle penetration drilling technique in water-rich soft soil layer,the reinforced prestressed steel support temporary shoring technology,and the frost heave and thaw settlement deformation control technology of multiple grouting are put forward.In addition,the summarized empirical data can be used for reference in the implementation of similar projects.