NUMERICAL ANALYSIS AND RESEARCH ON SURROUNDING ROCK STABILITY OF LATERAL KARST CAVE TUNNEL
TAN Daiming1，QI Taiyue2，MO Yangchun2
(1. Guangdong Provincial Railway Construction Investment Group Company Ltd.，Guangzhou，Guangdong 510635，China； 2. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China)
Abstract：In combination with the construction process of karst cave tunnel of Zhongdian Highway，by using the finite difference software FLAC3D，the surrounding rock stability of karst cave beside the tunnel is simulated，and the numerical calculation results and field monitoring results are compared. The results indicate that after the tunnel is excavated，the surrounding rock is converged toward the karst cave and the tunnel. The surrounding rock between the karst cave and the tunnel is converged in opposite direction and is also the more dangerous zone. The plastic zone of the surrounding rock mainly concentrates around the tunnel and the two sides of karst cave while the top and the bottom of karst cave have little plastic zone. The surrounding rock between tunnel and karst cave possibly brings large deformation and rock mass failure because of stress concentration，and its stability is focused seriously. The conclusion can be used for reference for the design，construction and research of similar tunnels.
谭代明，漆泰岳，莫阳春. 侧部岩溶隧道围岩稳定性数值分析与研究[J]. 岩石力学与工程学报, 2009, 28(S2): 3497-3503.
TAN Daiming1，QI Taiyue2，MO Yangchun2. NUMERICAL ANALYSIS AND RESEARCH ON SURROUNDING ROCK STABILITY OF LATERAL KARST CAVE TUNNEL. , 2009, 28(S2): 3497-3503.
