辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(6)：656-663,8.DOI:10.11956/j.issn.1008-0562.2023.06.003
基于最优赋权-可拓云模型的缓倾围岩隧道底部变形风险综合评价
Comprehensive evaluation of flat rock tunnel bottom deformation risk based on optimal weighting-extension cloud model
摘要
Abstract
Aiming at the problem of identification of structural deformation risk and uncertainty classification of the bottom structure of the slowly dipping surrounding rock tunnel under complex geological conditions,this paper combines the deformation mechanism of the gently dipping rock layer to establish a risk evaluation index system of 15 influencing factors including hydrogeology,design construction and construction management,and divides the risk levels into Ⅰ(low),Ⅱ(moderate),Ⅲ(high)and Ⅳ(high).The fuzzy hierarchical structure model(FISM)and the subjective and objective weighting methods of optimizing risk factors by coefficient of variation are introduced,and the optimal combination weighting vector is determined based on the sum of squares of dispersion(Ward)theory.According to the digital characteristics of the cloud model,the extendable cloud model is established,and the deformation risk level of the tunnel bottom is determined according to the principle of maximum membership.The established model was applied to the evaluation of three tenders of a tunnel project in Sichuan-Chongqing mountain,and the evaluation results of each tender were Ⅲ,Ⅱ,Ⅲ,Ⅲ,and Ⅳ.Combined with the engineering site deformation and FLAC3D simulation results,which verified the feasibility of the deformation risk assessment model at the bottom of the slowly tilting surrounding rock tunnel.关键词
缓倾围岩/隧道变形/组合赋权/可拓云模型/变异系数/风险评估Key words
gently sloping rock/tunnel deformation/combined weighting/extension cloud model/variation coefficient/risk assessment分类
交通工程引用本文复制引用
翁效林,李世鑫,杨晓东,张志强..基于最优赋权-可拓云模型的缓倾围岩隧道底部变形风险综合评价[J].辽宁工程技术大学学报（自然科学版）,2023,42(6):656-663,8.基金项目
国家自然科学基金项目(U1934213) （U1934213）
