高速铁路特殊地形地貌段路基防风措施研究应用-《高速铁路技术》

文章信息/Info

Title:: Research on Anti-wind Measures for Sections with Special Terrain and Physiognomy of High-speed Railway

Author(s):: ZHANG Guangfeng; GAO Zhiwei; China Railway First Survey and Design Institute Group Co., Ltd., Xi’an 710043, China

Keywords:: railway subgrade|anti-wind measures|theoretical analysis|special terrain and physiognomy|transition section

摘要:: 兰新高速铁路联调联试、百里风区大风专项试验期间，列车通过大风区地形地貌变化地段、路堤路堑过渡段时出现车体晃动，针对这一现象，本文对特殊地形地貌段的大风流场特征及其防风措施进行了深化研究。研究结果表明：（1）路基防风工程的薄弱环节主要存在于地形地貌变化地段、路堤路堑挡风墙过渡段、挡风墙与路堑的过渡处等区域，其中挡风墙过渡段处的风速变化率最大；（2）通过加高挡风墙高度、"外补内切"挡风墙、延长路堤挡风墙及改变地形地貌等工程措施，可有效改变挡风墙过渡段区域的大风流场，提高列车运行的安全性和旅客舒适性。

Abstract:: In response to the phenomenon that the car body shakes when the train passes through the section with change of terrain and physiognomy as well as transition section between embankment and cutting in strong wind area during the joint debugging and the special test in the 100 km wind area of Lanzhou-Xinjiang high-speed railway, the further study of strong wind flow field characteristics and anti-wind measures of section with special terrain and physiognomy is carried out in the paper. The research results show that:(1) The weak link of the anti-wind project in subgrade mainly exists in the regions with variation of terrain and physiognomy,the transition sections of embankment and cutting as well as the transition section between wind-break wall and cutting, etc. The speed variation rate of wind in the transition sections of wind-break wall reaches the largest. (2) By using engineering measures like increasing the height of wind-break wall, outside supplement and inside cutting of wind-break wall, extending the embankment wind-break wall and modifying the terrain and physiognomy, etc., the strong wind flow field characteristics are effectively changed in the transitional sections, so that the safety of the trains and comfort of passengers are also improved.