标题：Damage Analyses on Rock Cover of the Subsea Tunnel in Jointed Rock
作者：Wang Gang; Jiang Yujing
作者机构：[Wang Gang; Jiang Yujing] Shandong Univ Sci & Technol Qingdao, Qingdao 266510, Peoples R China.; [Jiang Yujing] Nagasaki Univ, Dept Civil Engn, Naga 更多
会议名称：2nd International Conference on Mine Hazards Prevention and Control
会议日期：OCT 15-17, 2010
来源：2010 INTERNATIONAL CONFERENCE ON MINE HAZARDS PREVENTION AND CONTROL
关键词：Damage evolution equation; FEM; Subsea tunnel; Rock cover
摘要：Joints and Seepage pressure are considered as a positive factor for the damage of rock wall. Associating the damage mechanics, the constitutive model for the jointed roclanass under the seepage pressure is obtained under the conditions of compression-shearing and tension-shearing. The calculation method and finite element procedure come into being according to the above model. The program is applied to actual project to model the ground movements that occur when the subsea tunnel is installed in the jointed rockmass. According to the geological section, the subsea tunnel axes of nine sections selected are researched and analyzed. The paper applies the finite element procedure to analyze different cases of the sections through lifting and shifting the tunnel axis according to the thickness of bedrock. By analyzing their damage zones, plastic zones, stress state and displacement variation in all cases, the stability of the tunnel is studied. Based on the above analysis, the most appropriate tunnel axis position of every section is proposed.