基于物元可拓及理论的深基坑施工定量风险分析

Quantitative risk analysis of deep excavation based on matter-element and extension set theory

深基坑工程建设项目中包含了许多相互关联的风险因素,每个因素都存在一定的不确定性,又不能用同一个标准衡量,尤其给定量的风险评价带来了难题。引入物元和可拓集合理论,参考肯特评分改进方法,建立了深基坑施工风险定量评定的计算模型,确定了人的素质、施工管理、设计因素和周围环境4个主要评价要素,以及各风险特征评分及其权重赋值的计算方法。在此基础上以某段地铁车站深基坑工程为例进行了风险定量计算,表明基于物元和可拓集合理论的评定方法对深基坑的风险评定是可行的,为城市地铁深基坑施工安全的风险定量分析提供了新的思路。

There are several relative risk factors during the construction of deep excavation engineering,and each factor has certain uncertainty,and can＇t be measured by the same standards. It brings about a lot of difficulties for quantitative risk evaluation to deep excavation engineering. The matter-element and extension set theory is introduced,and the improved method with the reference of Kent evaluation, the calculation model to quantitative risk evaluation of deep excavation engineering is established,and four major factors, namely the person＇s quality, construction management, design factor, and the surrounding environment are defined. On the basis,the quantitative risk evaluation to a subway station as an example to be calculated, and the result shows that this evaluation method of the matter-element and extension set theory is feasible,which provides a new thought for quantitative risk evaluation to urban subway deep excavation engineering.