Study On The Dynamic Characteristics Of Ballastless Track Structure Of Passenger Dedicated Line On Soil Roadbed

In recent years, more and more passenger dedicated lines was constructing in our country, because of the great increase of the train speed, ballastless track structure has been used greatly; Along with the increase of the speed t, a higher request to the track and the roadbed structure are being put forward. The method of paving ballastless track in the tunnel and bridge structure has been generally approved and has standardized. However, paving ballastless track of high-speed railway on soil roadbed should be very careful, Except the German Rheda track on soil roadbed, other countries are still in the experiment step. The study of ballastless track on soil roadbed in our country is still in the beginning, different passenger dedicated lines constructions should based along the geography background environment, the geological construction standard,and the representative choice, ,then we can promote to use it after the accumulation of the experiences. the study on the dynamic characteristics of ballastless track structure of passenger dedicated line on soil roadbed has the significant meaning to our country high-speed railway construction.In order to guarantee the coordinate transmission on the wheel track vertical design load, it requires to use the three dimensional integration structural model containing track and the roadbed. it considered each part of the track and roadbed system in details, and analyses the dynamics characteristics of the structure based on the track dynamics, summarizes the rules of the load transmission on the track structure, as well as the dynamics influence when model parameter is changing, calculated and analyzed each kind of situation, obtains the control target of the ground distortion, proposes the suggestions about design, constructs and maintains.