雷达图法在复杂地质下岩溶隧道风险评估中的应用

Application of Radar Chart Method to the Karst Tunnel in Complex Geology

诱发岩溶隧道风险的因素复杂多样。针对复杂地质条件下岩溶隧道风险评估中存在主观性与客观权重单一片面性的问题,文章采用定性和定量相结合的思想,选取主要影响因素,建立岩溶隧道风险评估体系,利用熵值法确定指标权重并对指标进行归一化处理。在此基础上,建立数值与图形相结合的雷达图法评估模型,引入四个风险等级对应的参考样本,定量并直观地得出各等级综合评估范围,从而实现岩溶隧道风险评估。评估结果验证了雷达图法岩溶隧道风险评估模型的可行性和准确性,可为岩溶隧道风险评估提供理论依据。

The factors inducing karst tunnel risks are complex and diverse.Aiming at the subjectivity,unicity and one-sidedness of objective weight of risk assessment of the karst tunnel in complex geology,a concept combining qualitative with quantitative analysis is adopted,a risk evaluation system for the karst tunnel is established by select⁃ing the main influencing factors,the indexe weights are determined and normalization processing is conducted by en⁃tropy method.A risk assessment model combining numerical values and graphics is set up by utilizing the radar chart method,four reference samples corresponding to four risk levels are introduced,and the comprehensive evalua⁃tion range of each risk level is obtained quantitatively and intuitively.