Analysis On Ground Deformation Induced By Shield Tunnel Of Subway Crossing Lines Of High-speed Rail And Dynamic Response Of The Train

’With the improvement of China’s high speed rail network and the great-leap-forward development of rail transit of big and medium-sized cities, considering the advantages of the subway tunnel shield construction, thus 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 strata, which led to high-speed rail track to produce irregularity, as a result, forming a significant risk to the safe operation of trains.Based on the Beijing-Shanghai high-speed rail wear under Beijing Metro Line10Phase Ⅱ project, the Beijing-Tianjin inter-city, the Beijing-Kowloon Railway Project, through numerical simulation and comparative analysis of the measured data of the field of finite element software under the shield worn on the high-speed formation, deformation of the track rail and the power train response were studied. This paper carried out the following tasks:First, analyzing the mechanism of formation and deformation caused by shield construction orbit-to identify shield construction and the impact of factors causing ground subsidence track, and to determine a reasonable plan to wear under construction when the shield to provide the right ideas.Secondly, Simulating three-dimensional high-speed rail to wear down the shield through the ANSYS software, and figuring out the reasons of different grouting pressures lead-generation layer parameters such as the formation and deformation of the different conditions of each track.Again, running the power-analysis of high-speed trains using ABAQUS software, taking train vibration acceleration as the basic reference volume,-thus determining a reasonable grouting pressure by reference of vibration acceleration of the Beijing Shanghai high speed rail.Finally, We determined the plan of protection and control measures on wearing down by obtaining site measurement of ground deformation data through the good stragety of monitoring, and comparing with the numerical simulation.