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《Chinese Journal of Underground Space and Engineering》 2017-03
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Numerical Simulation on Effects of Interlayer Pore Karst on Tunnel Stability

Zhao Mingjie;Jin Peng;Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education,Chongqing Jiaotong University;  
Based on a water diversion project in Banan District of Chongqing,this paper established corresponding numerical simulation models of 13 main sections in tunnel engineering through the finite element software ABAQUS,by using the two dimensional finite element numerical simulation method based on fluid structure coupling theory.By analyzing the stress,displacement and water flow of surrounding rock during excavation when the hydraulic tunnel is in different positions,this paper obtains the influence of the interlayer pore Karst water on the stability of the tunnel in excavation process and makes suggestions.The results show that:the stress and displacement of surrounding rock changes complexly when the tunnel crosses layers;the existence of the permeable layer accelerates the stress dissipation in a certain extent and weakens the tunnel deformation speed;the water inflow of tunnel is relating to its area size in the permeable layer.
【Key Words】: interlayer pore water hydraulic tunnel stability of surrounding rock
【Fund】: 重庆交通大学研究生创新基金(20140119)
【CateGory Index】: TV554
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【Citations】
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