A method for assessing collapse risk for tunnels constructed by drill and blast method
Collapses are serious or even disastrous accidents during tunnel construction, which of frequent occurrence. This paper describes a method for assessing the risk associated with collapses in tunnels. The focus is put on collapses which occur in the tunnel constructed by drill and blast method. And the preference is attached to studying their causes and mechanisms and assessing their risk during tunnel construction. On the basis of an extensive literature search, causes and mechanisms analysis of collapse is carried out. All the potential risk factors related to tunnel collapse are identified. The statistical analysis and the accident tree analysis are carried out to analyze the contribution of each risk factor to tunnel collapse. The importance ranking of risk factors is given. It can be confirmed that precise geological investigation and appropriate construction process are the most effective controllable factors for preventing the occurrence of tunnel collapse. Accident tree analysis is also employed to estimate the probability of collapse occurrence. And the analytic hierarchy process is employed to evaluate the potential loss of collapse. At last a whole approach for tunnel collapse risk assessment is presented.
Y.WANG H.W.HUANG D.S.XU
Tongji University, Shanghai, China
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）