灰色关联故障树分析法在基坑工程放坡开挖中应用

Application of gray correlation fault tree analysis for unprotected open cut excavations

为使某放坡开挖的基坑工程系统安全性得到有效控制,对放坡开挖施工过程中可能出现基坑工程系统失效的各种危险源进行识别,建立故障树;采用专家打分法确定基坑工程系统故障树底事件的失效概率;通过对故障树分析,找出引起放坡开挖施工的基坑工程系统失效的各种故障模式;应用灰色关联理论,对引起放坡开挖施工的基坑工程系统失效的各种故障模式进行关联度计算并按大小排序,从而找出放坡开挖施工的基坑工程系统可靠性的薄弱环节,为预防和控制放坡开挖施工的基坑工程系统安全事故的发生、改进放坡开挖施工的基坑工程系统可靠性与安全性、制定安全控制措施提供理论依据。

The risk aspects that lead to identified, and fault tree is established in events is evaluated degree calculation via expert evaluation. and according to the system failure in the construction of unprotected open-cut excavations are order to ensure foundation pit safety. The failure probability of fault tree basic Based on the fault tree, various failure modes are determined. By grey relative descent orders, the weak links of an unprotected open-cut excavation are identified.