Research On Leakage Monitoring And Risk Warning Of Operating Subway Tunnels

Accompanied by the acceleration of the process of urbanization and the transformation of economic growth patterns to the improvement of quality in China,the rail transportation in infrastructure has mushroomed.As the use of space on the ground has becoming saturated,our country has gradually turned to the development and use of underground space,and the number of tunnel projects is increasing.However,because subway projects are mostly below groundwater level,in many diseases,leaking water diseases occur more frequently in operating tunnels.The occurrence of water leakage in the operation of the subway tunnel will not only result in the cracking of the tunnel structure,but also the shortened service life of the auxiliary equipment in the tunnel and the reduction in the efficiency and safety of the train operation.Those results will make it difficult to maintain the subway health and cause serious problems,such as casualties and property damage.Therefore,how to effectively evaluate the water leakage level of the operating subway and the treatment of seepage water disease to prevent the occurrence of leakage water from the root cause,which is an urgent problem to be solved in the field of subway engineering.Based on the analysis of the influencing factors of the leakage of subway tunnels,the paper establishes the evaluation index system of the water leakage hazard of the operating tunnel based on five aspects: natural conditions,surrounding rock and groundwater,design factors,construction and operational factors.The copula-cloud model was used to calculate the level of water leakage hazards of the operating tunnels from the perspective of the relationship between the influencing factors.Then,the risk index level and risk probability were taken into account to calculate the higher risk index area.A combination of three-dimensional laser scanning and temperature sensors was used in IOT monitoring system,in order to monitor the higher-risk index operating tunnels calculated in the test area under the Internet of Things.The Internet of things monitoring system can be used to dynamically monitor the regional symptoms of high water leakage risk index of the tunnel and reach each port through the Internet of Things.Finally,according to the diagnostic information the optimization of the treatment measures for the leakage of water in the tunnel are proposed.