新建通道零距离下穿运营地铁施工变形控制技术

CONSTRUCTION DEFORMATION CONTROL TECHNOLOGY FOR ZERO-DISTANCE CROSSING OF NEW CHANNEL UNDER SUBWAY IN OPERATION

为保证新建通道零距离下穿长久运营地铁的施工稳定,以北京地铁东四十条站横通道零距离下穿运营2号线西北口为例,采用数值模拟和现场监测,研究了零距离下穿施工中深孔注浆和千斤顶支顶的变形控制效果,研究成果可为地铁工程改扩建施工提供参考。

For the stability of zero-distance crossing of new channels under subways in operation,the zero-distance crossing of Dongsi Shitiao Station of the metro line in Beijing under the northwest entrance of the Line 2 in operation was taken as an example.The deformation control effect of deep hole grouting and jacking in zero-distance crossing was studied by numerical simulation and on-site monitoring.Research results can be used for reference in subway reconstruction and expansion.