STABILITY ANALYSIS AND MONITORING FOR TUNNEL IN LOOSE SOILS DURING CONSTRUCTION
崩塌松散围岩隧道施工稳定分析与监控

This paper deals with stability of the Sangzhouling Tunnel construction. First, FEM is used to analyze the stability of the shallow tunnel section, and soil nails are used to improve the upper soils. Second, monitoring work is done deliberately. The collapse of local face is predictsed successfully. The monitoring results show the influence of the aguifers in the loose surrounding rock on the stability.