基于AHP和改进型灰色聚类法的地铁盾构施工风险评价研究

Research on risk assessment of subway shield construction based on AHP and improved grey clustering method

对富水砂卵石地层地铁盾构施工进行深入研究,整理和分类识别各指标,确定出地铁盾构施工风险评估指标体系。通过层次分析法确定评价指标体系中准则层和指标层权重,通过划分灰类、构造改进型可能度函数、计算综合聚类系数、确定风险级别等步骤构建改进型基于中心点混合可能度函数的灰色聚类地铁盾构施工风险模型,最后通过项目实例分析评价,验证了该方法的科学性和可推广性。

The risk assessment index system of subway shield construction on water-rich sand and gravel stratum was determined by conducting in-depth research,sorting out and classifying various indexes.The weights of criterion layer and index layer in the evaluation index system were determined by analytic hierarchy process.The improved grey cluster risk model of subway shield construction based on mixed possibility function of central point was constructed by dividing grey class,constructing improved possibility function,calculating comprehensive clustering coefficient and determining risk level,etc..Finally,the project example was analyzed and evaluated.It is proved that the method is scientific and can be extended.