Dynamic Responses Analysis on High Speed Railway Subgrade and Subgrade-bridge Transition
For roadbed and the transition section easily lead to problems of high -speed railway,dynamic response tests of the high embankment , low embankments, cuttings, half cutting roadbed and filling and excavation of transition section between bridge and subgrade are carried out when high — speed train passes. Through analyzing large amounts of data ,the conclusions are made that dynamic displacement changes of different forms of embankment are not obvious as the train speed , and acceleration increase significantly with the continuous improvement of train speed. Dynamic response of the cut is greater than that of the high embankment and half -filled and half-dug embankment, and dynamic response of low embankment is the minimum. In addition, the dynamic response of filling transition section is significantly larger than the cut transition section. The main reason is that the construction quality of the filling transition section is difficult to guarantee test by ground penetrating radar. Moreover,it is also found that the dynamic response of transition section increases with the train speed improvement. And in a certain distance to the abutment which is 31m in this article,the dynamic response of the transition section decreases with the increase of the distance from bridge abutment.
Shengchuan LIU Guiling DING
Geotechnical Laboratory , Research Institude of Highway Ministry of Transport, Beijing, 100088 Comprehensive Studies Section ,Beijing Institute of Geology ,Beijing, 100120
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
674-679
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）