针对高速铁路基床底层细粒土填料设计问题,设计3种不同细粒土基床底层结构形式进行现场试验,采用激振机模拟高速列车动荷载方法进行测试,分析在不同改良工况时基床的动力响应情况,探求基床底层改良与不改良土在列车动载作用下有何区别,以及基床底层是否全部进行改良等问题。 In order to solve the design problem of fine grained soil filler on the high-speed railway bed, three kinds of ground-based subgrade bed structures were designed for on-site test, and excited machine was used to simulate high-speed train dynamic load. Bed dynamic response to explore the improvement of the underlying bed and does not improve soil under the action of the train What is the difference between the role of the bed and whether all the underlying improvement.