基于风险动态评价与控制的岩溶隧道施工许可机制.PDF

150~200 m U45 P64 A 2011 (1985 )E-mail: issacxuzhenhao@163.com Construction permit mechanism of karst tunnels based on dynamic assessment and management of risk 1 1 1 2 1 XU Zhen-hao , LI Shu-cai , LI Li-ping , CHEN Jun , SHI Shao-shuai (1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China; 2. Sanxia-Fanba Expressway Construction Headquarters of Hubei Province, Yichang 443007, China) Abstract: Jigongling Tunnel of Fanba Expressway passes through strong karst aquifer of Cambrian Shilongdong Fm, and water table is about 150~200 m above the tunnel floor. Large-scale water inrush and mud irruption are easy to happen. In order to control construction hazards, the karst development characteristics of the tunnel site are studied. The risk surroundings, factors and dynamic management for water inrush and mud irruption of the karst tunnel are analyzed. Preliminary, secondary and dynamic risk assessment models based on the comprehensive weights and the expert scoring method are established. A new management mechanism of construction risk, which is a kind of construction permit mechanism based on risk assessment of water or mud inrush, is developed and successfully carried out for the first time. This mechanism not only can be used for the risk management of karst