下穿既有建筑物的地铁隧道注浆施工之安全性评价

Safety Evaluation of the Existing Buildings over the Grouting of a Shallow Excavated Tunnel

以某地铁线下穿某既有建筑为例,采用现场监控量测和数值计算的方法,分析评价了该建筑物在下穿过程中的安全性。并通过Flac3D分析了采用全断面注浆施工,对地层变形控制,支护结构受力的影响。

This paper present a case history of the stability evaluation of an existing building. This building is over a shallow excavated tunnel and the grouting on the tunnel is required. The evaluation combined with both in-situ monitoring and the numerical analysis approach. The grouting operation on an entire cross section is simulated with FLAC 3D software. The deformation of the ground soil mass and the stress on the supporting structures are analyzed.