Safety evaluation of metro construction by the entropy-G2 method to improve the LEC method
In order to more accurately and conveniently obtain the underground shield safety eval-uation results,an improved LEC evaluation model is proposed in this paper.Firstly,the WBS-RBS method is used to establish a risk list,and an expert group is formed to carry out the evalua-tion.Subsequently,the entropy value of the expert data is used to determine the importance ratio of each expert;the G2 assignment method,which introduces the concept of entropy value,is es-tablished to assign weights to the experts and amend the evaluation results of the expert group.This evaluation method not only overcomes the limitations of the traditional LEC method which is more subjective,but also solves the problem of coefficient allocation in the combined assignment method,truly reflecting the realistic factors and the information contained in the data itself.Fi-nally,the evaluation results of the risk list are obtained in conjunction with the actual project,with countermeasures proposed.
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