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《Journal of Central South University(Science and Technology)》 2013-07
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Analysis of deformation stability on Longbeiwan low diversion tunnel entrance slope and reinforcement

LI Yi1,2,CHEN Yifeng1,2,ZHOU Song1,2,ZHOU Chuangbing1,2(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;2.Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Ministry of Education,Wuhan University,Wuhan 430072,China)  
Using the investigated rock parameters of Longbeiwan low diversion tunnel entrance slope,the status quo of the slope was analyzed.The rock strength parameters of the slope surface were modified and the initial stress field was calculated.Multi-joint model was used to simulate the unloading cracks during the excavation,and the causes were analyzed.The original reinforcement measures were simulated,and then,the deformation and stability situation during the excavation were analyzed.On the basis of these,reinforcement measures were modified and enhanced,and deformation and stability were analyzed when the slope is being suffered by a rapid drawdown of water level.The results show that the reinforcement measures are feasible and effective,which can provide theoretical support to the excavation and reinforcement of the slope.
【Fund】: 国家自然科学基金资助项目(51079107 51179136);; 国家优秀青年科学基金项目(51222903)
【CateGory Index】: TV223
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