An Evaluation Method for Safety Resilience of High Slope Construction Based on Bootstrap-matter-element Extension Model
In order to solve the problems of one-sided index system,fuzzy value range,and weak practicability in traditional high slope construction safety evaluation,a method of safety resilience evaluation of high slope construc-tion based on Bootstrap-matter element extension model is proposed.Combined with the concept of safety resil-ience,the correlation strength method and keyword cluster analysis are used to screen the safety factors of high slope construction.Kaiser-Meyer-Olkin(KMO)test and multicollinearity test are used to deal with index correlation degree and collinearity respectively.The evaluation index system of construction safety resilience of high slope is formed,which takes stability,redundancy,efficiency and fitness as the first index and operator experience and other 20 factors as the second index.The comprehensive matter-element matrix is determined according to matter-element extension principle,and the classical domain is determined by Bootstrap method to deal with the unknown sample distribution hypothesis.Furthermore,the correlation degree function is established and the index correlation degree under each evaluation grade is calculated.The weight of each safety resilience index is determined by entropy weight method,and the construction safety resilience evaluation model of high slope is formed.Based on a highway high slope construction project,the feasibility of the model is verified,and compared with the traditional construc-tion safety risk assessment results,the results show that the safety resilience grade of the high slope is III,which is consistent with the risk assessment results of LEC method and expert investigation method.Moreover,the Boot-strap-matter-element extension model provides the overall safety resilience level and traceability analysis results.Compared with the likelihood-exposure-consequence(LEC)method,the mature-element extension model improves the accuracy by 9.68%,the recall rate by 5.51% and the generalization by 12.09% .The construction safety resilience index system of high slope includes construction safety factors in addition to the basic influencing factors such as slope structure,so it has higher practicability.
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