Experimental study on dynamic load magnification factor for ballastless track-subgrade of high-speed railway

作     者：Renpeng Chen Xing Zhao Zuozhou Wang Hongguang Jiang Xuecheng Bian 

作者机构：Institute of Geotechnical EngineeringZhejiang University MOE Key Laboratory of Soft Soils and Geoenvironmental EngineeringZhejiang University Zhejiang Electric Power Design Institute 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2013年第5卷第4期

页      面：306-311页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：the National Natural Science Foundation of China(51225804 U1234204 51222803 51178418)for the financial supports 

主　　题：High speed railway Dynamic load magnification factor(DLF) Train speed Ballastless track subgrade 

摘      要：The magnitude of dynamic load produced by high-speed trains depends on many factors,of which train speed is the most critical ***,it is quite difficult to determine the effect of train speed on dynamic load using the theoretical methods due to the complexity of the interaction between vehicle and *** large-scale model test has gradually become an important approach for studying dynamic responses of ballastless track-subgrade of high-speed *** this study,a full-scale model of ballastless track-subgrade was constructed in accordance with the design and construction standards for Shanghai-Nanjing intercity high-speed railway line ***,the dynamic strain of slab and the dynamic earth pressure of subgrade were measured by conducting single wheel axle excitation *** addition,the relationship between the dynamic load magnification factor（DLF） and the train speed was ***,the DLF of track-subgrade under different train speeds was proposed,similar to that given by German Railway Standard.