粗糙集理论在地下工程风险管理中的应用

Application of rough sets in risk management of underground engineering

风险评价指标权重的确定在风险评价过程中处于核心地位。为了使属性权重的确定更具有客观性和消除评价指标之间的相关性而产生的影响,本文采用基于粗糙集理论和主成分分析法相结合的综合权重计算方法。首先收集相关的风险事故资料以及对风险事件进行原因分析和归纳,通过专家访谈和查阅文献的方法建立风险知识表达系统,运用粒度相关理论对评价指标进行权重计算,最后得出设计因素对明挖基坑安全风险影响最大。所以应加强设计阶段的风险控制。

The determination of the weight of the risk evaluation index is a key step in the risk assessment. In order to make the outcome of attribute weights more objective and eliminate the correlation between the evaluation indexes, this paper constructs a comprehensive weight calculation method based on rough sets theory and principal component analysis method. First, it collects the information about risk accident and analyzes the reasons. Second, it uses the method like expert interviews and literature review to set up risk knowledge representation system, then uses the theory about granularity to calculate the weight of the evaluation index. Finally, the paper concludes that the design factor has the greatest impact on the safety.Therefore, the risk control in the design stage should be strengthened.