风井开挖中的静力爆破施工安全风险评价

为了确定风井开挖中静力爆破施工安全风险等级,首先识别到影响静力爆破施工安全的6个一级指标以及19个二级指标,建立了风险评价指标体系;然后基于云理论,构建施工安全风险评价云模型;最后应用在福州南站小里程风井开挖中静力爆破施工安全风险评价中,并确定风险等级偏向4级,所以应当采取相应控制措施以及对周边环境沉降等变形的预警系统,并且计算结果与实际工程相符,因此为静力爆破施工安全风险评价提供了一种理论模型的参考。

Safety Risk Assessment of Static Blasting Construction in Air Shaft Excavation

In order to determine the safety risk grade of static blasting construction in air shaft excavation,the risk evaluation index system is firstly established by identifying the 6 first-class indexes and 19 second-class indexes which affect the construction safety of static blasting,and then the cloud model of construction safety risk evaluation is constructed based on cloud theory.Finally,it is applied to the safety risk assessment of static blasting construction in the excavation of small mileage air shaft of Fuzhou South Station,and the risk grade is determined to be biased to grade 4,so the corresponding control measures and the early warning system of deformation of engineering environmental settlement should be taken,and the calculation results are consistent with the actual engineering,therefore,it provides a reference for the safety risk assessment of static blasting construction.