The Analysis And Simulation Of The Settlement Of The High-speed Rail Caused By The Crossing Of Tunnel

With the development of our society,and the larger and larger of the city scale and the population.Such problems such as the traffic congestion are following.In the process of solving the traffic problem,the subway is developing rapidly with the advantage of large volume,fast-sped safely and land-saving.Considering the advantages of the subway tunnel construction,the high speed railway construction under the shield project could emerge in a large number at the urban rail construction process in the future.Shield Construction will cause deformation beneath the soil,which led to high-speed rail track to produce irregularity,as a result,forming a significant risk to the safe operation of trains.It is based on the Nanjing airport-subway crossing the high-speed rails,through numerical simulation and comparative analysis of the measured date of the finite element software to analysis the deformation of the railway and the power train response caused by different ways and steps of the excavation.Firstly,analyzing the mechanism of formation and deformation caused by the shield construction in order to determine a reasonable idea for the next construction of the shield crossing engineering.Secondly,simulating a three-dimensional model to through the ABAQUS software,and figure out the data of deformation and settlement of the cushion cap which caused by different excavation types,and analysis the effects and action of the types.Thirdly,simulation the three-dimensional model of the train and the pathway by using ABAQUS software,taking the train vibration acceleration as the basic reference volume,and researched the value of the vibration acceleration under different excavation steps,and drawn the conclusion by comparing with China's high speed railway design specifications.Finally,comparing the measurement of ground deformation date with the numerical simulation in order to determine the plan of the crossing engineering,and to prove the rationality of the finite element simulation.