【摘要】 为分析高速铁路高架线列车运行对既有线路基影响,建立桥墩—大地—既有线路基有限元模型,结合测试验证模型可靠性,分析不同行车条件、不同两线距离条件下既有线路基应力状态,预测高架线和既有线列车同时运行条件下累计沉降变形。研究结果表明:城际高速列车运行对既有线路基应力状态和累计变形影响很小,桥墩与既有线距离按限界控制即可满足要求。更多还原

【Abstract】 In order to investigate the impact of train running on elevated bridge of high-speed railway on existing railway subgrade,the pier-soil-subgrade finite element model was established of which the reliability was demonstrated based on test deta.First,the stress state of the existing railway under different traffic conditions and different line distance was analyzed.Then,the cumulative settlement deformation under traffic loading of high speed train and low speed train was predicted.The results show that the state of stress and accumulated deformation of existing railway subgrade induced by running trains on elevated high-speed railway bridge is very little,and the distance between the pier and the existing railway determined by clearance control can meet the requirements.更多还原