In order to effectively control the safety risk of deep foundation pit construction caused by adjacent existing subway tunnels,a safety risk evaluation method for deep foundation pit construction adjacent to existing subway tunnels based on C-OWA-cloud model was proposed.According to the characteristics of deep foundation pit and the situation of adjacent existing subway tunnels,four first-level evaluation indexes,namely management risk,technical risk,environmental risk and structural status of existing subway tunnels,were selected to construct a safety risk assessment model of adjacent subway tunnels near deep foundation pit construction based on C-OWA-cloud model,and a project was taken as an example for verification.The research results show that the safety risk level of the deep foundation pit construction adjacent to the existing subway tunnel project is low risk,which basically conforms to the monitoring results of the project construction.Among them,the relationship between the deep foundation pit and the location of the tunnel,the earthwork excavation scheme,the support structure scheme,the drainage scheme and other indicators are more risky,so it is necessary to focus on monitoring the tunnel itself and its construction scheme.
关键词
深基坑施工/邻近既有地铁隧道/C-OWA/云模型/风险评价
Key words
deep foundation pit construction/neighboring existing subway tunnel/C-OWA/cloud modeling/risk evaluation
维普
万方数据