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《Chinese Journal of Underground Space and Engineering》 2012-01
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Discussion on Lining Optimization Design of Subway Station Based on Safety Factor

Sun Wenjie1,Kong Liang1,Zheng Yingren2,Ren Xiaoyun1(1.Department of Science,Qingdao Technological University,Qingdao,Shandong 266033,China;2.Department of Civil Engineering,Logistical Engineering University,Chongqing 400041,China)  
There load and deformation of initial lining are big in practical engineering,so the lining may work in plastic state.The initial lining should be taken as elastic-plastic reinforced material in calculation.Based on the lining design calculation of a station in Qingdao subway,the strength reduction method is applied to the analysis of tunnel stability.Considering the influence of stress release rate of surrounding rock on lining,the safety factor of tunnel surrounding rock and lining is obtained by strength reduction method.The safety factor of surrounding rock with initial lining should not be less than 1.15~1.20.If the safety factor is less than 1.3,the secondary lining will support a certain amount of load.The product of safety factors of the initial lining and the secondary lining should be greater than 2 to ensure the secondary lining safety.The structure size of the initial lining and the secondary lining can be determined through calculation,and the tunnel safety can be ensured and the cost can be reduced reasonably.
【Fund】: 山东省自然科学杰出青年基金项目(JQ201017);; 青岛地铁科研项目(2010-15#)
【CateGory Index】: U231.4
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