基坑工程建设存在不确定性因素多.施工安全风险高等问题.针对地铁车站深基坑施工工艺多样.周边环境复杂的特点.通过博弈论组合赋权与可拓评价模型相结合.对地铁车站深基坑施工安全进行科学合理地评价.首先.以安全检查标准为基础.结合工程实际和现有文献.多角度分析构建评价指标体系,其次.通过层次分析法确定指标主观权重.熵权法确定客观权重.利用博弈论组合赋权法将其综合.再进行安全等级的划分.进而计算出评价对象的关联函数和关联度.最终得出总目标层所属的安全等级.对佛山某地铁车站深基坑工程实例进行评价.结果表明:基于可拓评价模型的安全等级评定结果基本符合现场实际.该方法有效且可行.

There are many uncertain factors and high construction safety risks in the construction of foundation pit engineering. It is necessary to study the scientific and reasonable evaluation of the construction safety of deep foundation pit in subway station by combining the combination of game theory and extension evaluation model. First of all. combined with engineering practice and existing literature. the evaluation index system was constructed from multi-angle analysis based on the safety inspection standards. Secondly. The subjective weight of the index was determined by the analytic hierarchy process. and the objective weight was determined by the entropy weight method. Game theory was used to divide the security level. the correlation function and correlation degree of the evaluation object were calculated. and the security level of the total target layer was finally obtained. This method was used to evaluate the deep foundation pit of a subway station in Foshan. The  results show that the safety grade evaluation results based on the extension evaluation model are basically in line with the actual situation. and the method is effective and feasible.