基于改进相互作用矩阵的基坑施工安全风险评价

为解决现有基坑施工风险评价方法过于单一、客观性不足的问题，从勘察设计与监测、支护结构、土方施工、排水与降水、周围环境5个方面选取19个基坑施工安全影响因素；利用引入C-OWA算子的相互作用矩阵对其进行交互耦合分析，考虑各因素的单独作用效果的同时，在削弱专家主观偏好和综合考虑各因素相关性的基础上，研究其协同作用效果；最后用实例验证方法的实用性，结果表明:该项目整体风险偏高，其中排水系统能力、地下水水位和地下管线埋布是影响该基坑施工安全的主要风险因素，需重点防控。

Safety evaluation of foundation pit construction based on improved interaction matrix

In order to solve the problem that the risk assessment of foundation pit construction is too singular and insufficient in objectivity,19 safety influencing factors of foundation pit construction were selected from five aspects:survey and design and monitoring,supporting structure,earthwork construction,drainage and precipitation,and surrounding environment.The C-OWA operator was introduced into the interaction matrix for analyzing the interaction coupling of the factors.At the same time as considering the individual action effect of each factor,their synergistic action effect was studied on the basis of weakening the subjective preferences of experts and comprehensively considering the correlation of each factor.Finally,an example was used to verify its practicability.The results showed that the overall risk of the project was high.Among them,the drainage system capacity,groundwater level,and buried underground pipelines were the main risk factors affecting the safety of the foundation pit construction,which should be prevented and controlled with emphasis.