Research On Construction Risk Control Of Deep Foundation Pit Engineering Close To Subway

With the continuous development of China’s urbanization process,the population is rapidly expanding,and urban traffic is congested.In order to meet people’s travel needs,urban infrastructure construction is in full swing.In urban rail transit,large urban complexes,and large commercial buildings,the utilization of underground space continues to increase,resulting in a continuous decrease in the available underground space.At the same time,the issue of safety risks during the construction of foundation pits is receiving increasing attention.And as cities continue to enter the era of subway rail transit and foundation pit projects continue to approach urban areas,the surrounding environment of foundation pit projects is becoming more and more complicated,especially more and more foundation pit projects and urban rail transit.The distance is getting closer and closer,and even cross the subway tunnel,this situation has appeared more frequently in recent years.The construction of deep foundation pits may cause excessive deformation of the adjacent existing subway tunnels,thereby endangering the safe operation of existing subways.Therefore,the construction risk of deep foundation pit projects adjacent to the subway has become the focus of academic and even engineering circles.Based on the project of Qingdao Intelligent Parking Comprehensive Plaza Deep Foundation Pit Project,the paper bases on the risk identification and analysis of the safety risks of the deep foundation pit construction of the Intelligent Parking Comprehensive Plaza adjacent to Metro Line 1.First,the project risk is divided into the project construction natural environment level There are four levels of the existing station structure impact level,project construction and construction technology management level,and project construction organization management level as first-level risk factors.There are fourteen corresponding second-level risk factors.Reason;then use the analytic hierarchy process to establish the risk index system and determine the weight of each index,use the fuzzy comprehensive evaluation method to evaluate the risk,and evaluate the risk level of the intelligent parking complex plaza deep foundation pit project as moderate risk;finally,according to the risk The evaluation results give specific control measuresThis paper conducts risk management research on the deep foundation pit project of Qingdao Intelligent Parking Complex Plaza,establishes a risk evaluation index system for the construction of deep foundation pits adjacent to Metro Line 1,and determines the risk level of construction risks of deep foundation pits,and proposes targeted solutions The strategy provides a certain reference for the construction of foundation pit projects near subway tunnels in China.