Risk assessment and prevention of deep foundation pit pile anchor support based on fault tree
To further study the risk and prevention strategy of pile anchor support accidents in deep foundation pits,the fault tree analysis was used to construct the event database of the bottom event,and the corresponding fault tree was constructed.On this basis,the increase coefficient method considering timeliness is introduced to scientifically adjust the probability of the top event.Combined with the actual engineering project cases,the probability importance and critical importance of the bottom event are systematically ranked and compared.The results show that the risk factors such as foundation pit over-excavation,additional load at the pit edge,failure to support the anchor in time,rainfall,failure to arrange drainage holes and insufficient precipitation depth are the key factors that cause pile anchor support accidents.In order to effectively deal with these risk factors,tar-geted preventive measures are proposed and applied in practical engineering.This study can provide important theoretical support for the prevention,emergency treatment and cause analysis of pile anchor support accidents,and can also provide a certain reference for the safety management of similar projects.
deep foundation pitpile-anchor supportfault treetimelinessprobability importancecritical im-portance
万方数据
维普
