Safety Assessment of Trackless Transportation Systems in Shield Tunnels Based on Fuzzy Comprehensive Evaluation
(1 Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031; 2 China Railway 14th Construction Bureau Co. Ltd., Jinan 250014)
Abstract：
Trackless transportation adopted in shield tunnel construction accelerates the advance rate and reduces the influence upon the environment while also increasing transportation risks. By analyzing the relative influential factors of a trackless transportation system, a secondary fuzzy comprehensive evaluation model was established,which includes transportation staff, the environment inside the tunnel, transportation conditions and safety management. Considering the qualitative and quantitative factors, a triangular fuzzy distribution and expert scoring method were used to obtain their membership degrees, respectively. To eliminate the decision maker’ s subjective preference, an analytic hierarchy process was used based on group decision making to establish the weight vector and conduct a fuzzy comprehensive calculation using the weighted average method. This evaluation model was applied to the safety assessment of the trackless transportation system in the shield tunnel of Nanjing metro line 10, and the results show that it is basically safe. No safety accidents occurred during construction after improving this transporta? tion system, which verifies the effectiveness of the evaluation model.
2016, Vol. 53 