某地铁基坑施工时邻近建筑物变形监测分析

北京某地铁深基坑周围环境复杂，该基坑呈东西方向，全长173．6m，北面紧邻知春路，南面为一系列的建筑物，其中紧邻基坑的一座两层建筑物与基坑的距离仅为2．06m，并且该建筑物已有一定的使用年限。通过现场检查检测，在基坑施工过程中，建筑物地基基础发生了明显的不均匀沉降，致使上部结构在门洞或窗口顶角墙面出现了一些倾斜裂缝。所以应在施工期间不断的对该建筑物进行沉降变形监测，对监测的结果及时分析处理，并反馈给施工单位，以便调整施工方案，做到信息化施工，确保建筑物的安全稳定，分析结果对北京地区类似地铁工程具有指导作用。

Deformation Monitoring and Analysis of Building Near Foundation of Tunnel in Construction

The around environment of tunnel deep foundation pit in Beijing is complexity, and the foundation pit is transmeridional, the lenth is 173. 6 meters. North of the foundation pit is Zhichun load, and the south is a series of structure. The distance of the building and the foundation pit is only 2. 06 meters, furthermore the building was used many years. Based on spot checking and detection, the foundation of the building generated obvious asymmetrical settlement in construction of tunnel foundation, therefore, acclivitous split appeared in jamb wall of superstructure. So, it＇s need to monitor deformation and settlement of the building uninterrupted, analyse and deal with monitor data in time, and submit the result to construction organization. Then, construction organization can adjust construction scheme to proceed informational construction, and ensure safety of the building. The result has instruction function to similar subway project in Beijing area.