依据基坑工程支护结构和周围岩土体的监测项目，将基坑工程自身监测对象分为地表沉降类、围护结构类和内支撑类。根据基坑开挖深度设定预警监测点的预警关联分析范围，并将此范围作为基坑安全状态评价的对象。在监测预警分级标准的基础上，通过大量案例数据、基坑变形力学关系等确定地表沉降类、围护结构类和内支撑类预警的预警标准，并引入熵权理论、区间数和危险度对预警关联分析范围内的上述三类预警进行融合，创建了多因素、多指标综合分析评价基坑安全状态的方法。该方法实现了对多源工程监测数据的融合，客观、快速的评价基坑安全状态，避免了单指标预警和人为判断基坑安全状态时的不全面、不准确等问题，为深基坑安全状态的快速、准确判定提供参考。

According to the monitoring items of the supporting structure of the foundation pit project and the surrounding rock and soil mass, the monitoring objects of the foundation pit project are divided into the ground settlement type, the retaining structure type and the internal support type; On the basis of monitoring and early warning classification standards, the early warning standards of the above three types of early warning are determined through a large number of accident case data and foundation pit deformation mechanics relations. At the same time, the three types of early warning within the scope of early warning correlation analysis are fused, and entropy weight theory and interval number are introduced to evaluate the safety state of foundation pit. This method realizes the fusion of multi-source engineering monitoring data, objectively and rapidly evaluates the safety status of foundation pit, avoids the incomplete and inaccurate problems of single index early warning and artificial judgment of the safety status of foundation pit, and provides reference for the rapid and accurate judgment of the safety status of deep foundation pit.