摘要
大西铁路客运专线途径太原盆地、临汾盆地和运城盆地，该3块盆地孕育有若干地裂缝。为了分析列车动荷载作用下，地裂缝场地铁路客运专线运营的安全性和舒适性，利用有限差分方法计算了动车荷载作用下地裂缝场地和无地裂缝场地路堤的动力响应问题。计算结果表明：地裂缝场地路堤的动位移和速度较无地裂缝场地大；地裂缝场地动应力在埋深7~11m处发生了突变；上、下盘的主要影响范围内分别为6m和3m。
Datong-Xi＇an Railway passenger-dedicated line passes through Taiyuan basin, Linfen basin and Yuncheng basin, and a number of ground fissures have developed in the three basins. To analyze the operation safety performance and riding comfort level of railway passenger-dedicated line in ground fissure area under the action of dynamic train load, this paper utilized the finite difference method and calculated the dynamic responses of the railway embankments located in the areas with and without ground fissures under the action of train load. The results show that the dynamic displacement and velocity of the embankment in the ground fissure area is larger than that in the area without ground fissure; there is a sudden change of dynamic stress at the burial depth of 7 m to 11 m in the ground fissure area;the main influence areas of hanging wall and footwall are respectively 6m and 3m.
出处
《铁道标准设计》
北大核心
2014年第8期18-22,共5页
Railway Standard Design
基金
西部矿产资源与地质工程教育部重点实验室开放基金(2013G1502006)
中央高校基金(创新团队项目)(2013G3294013)
关键词
地裂缝
铁路客运专线
路基
动荷载
动力响应
ground fissure
railway passenger-dedicated line
subgrade
dynamic load
dynamic re-sponse
