A Fuzzy Comprehensive Evaluation of the Seismic Hazard Rule and Relevant Risks for Mountain Tunnel Bodies
(1 College of Civil Engineering, Fujian University of Technology, Fuzhou 350108; 2 School of Civil Engineering, Dalian University of Technology, Dalian 116024)
Abstract：
As the tunnel body section is a relatively large proportion of the whole length of a tunnel, seismic risks cannot be ignored. A fuzzy comprehensive evaluation model (FCEM) was established to analyze the seismic risk to the body of a mountain tunnel. Based on data from 59 mountain tunnels damaged by the Wenchuan earthquake in the Sichuan province, 10 influential factors and their relationships to the earthquake were summarized: burieddepth, construction situation, supporting structure and its intensity, section size and shape, seismic intensity, seismic wave direction, epicentral distance, tunnel length, fault and fractured weak zone, and surrounding rock. Furthermore, the analytic hierarchy process was adopted to calculate the weights of influential factors, and a fuzzy calculation was conducted using the trapezoidal and semantic membership function by fuzzy mathematics and weighted average method. FCEM was applied to the Longdongzi tunnel, with the results showing that the seismic risk to the Longdongzi tunnel body is extremely high.
ZANG Wan-Jun-1,
WANG Zheng-Zheng-2
.A Fuzzy Comprehensive Evaluation of the Seismic Hazard Rule and Relevant Risks for Mountain Tunnel Bodies[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 45-53
2014, Vol. 51 