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| Research on the Load Transfer Rule in Ballastless Track Subgrade System of High - speed Railway |
| ZHOU Ying，CHEN Jin |
| (State Key Laboratory of Disaster Reduction in Civil Engineering，Tongji University，Shanghai 200092，China) |
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Abstract Research purposes ： As the basis of the Fallastless track structure of the high - speed railway，the subgrade is subjected to the train loads transferred from the fasteners and the track system. The internal stress level of the subgrade is directly influenced by the loads distributed by the fasteners. Therefore， the finite element model for the ballastless track subgradesystem of thehigh - speed railway was established to investigatetheload distribution of thefasteners and the variation of tlie subgrade internal stress. Research conclusions ： Regarding the ballastless track subgrade structure of the high - speed railway，the following conclusions can be drawn ： (1) When the single wheel axle load is acting on the fastener point of the ballastless track system，the load is mainly distributed by 7 fasteners. The load distribution is greatly affected by the space and the stiffness of the fasteners. (2) As for tlie two wheel system，if one of tlie wheel axle loads is acting on the fastener point of the ballastless track system，the load is mainly distributed by 11 fasteners. (3) The stress attenuation is slower with the further distance from the subgrade surface. When stress is transferred to the bottom of the subgrade，the subgrade stresses become very close with different axle loads. (4) This research results could provide references for t!ie design of the baiastless track subgrade system of thie high - speed railway in China.
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Received: 26 January 2016
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2016, Vol. 33 
