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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第47卷

期数:

2025年第03期

页码:

371-385

栏目:

黄河流域生态保护和高质量发展专刊(上)

出版日期:

2025-05-15

文章信息/Info

Title:

Numerical Simulation of Vibration Isolation Effect of Ditch Barriers on High-speed Train in Loess Areas, China

文章编号:

1672-6561(2025)03-0371-15

作者:

李亮忠¹; 邓亚虹¹; 2; 3*; 牛得鑫¹

(1.长安大学 地质工程与测绘学院,陕西 西安 710054; 2.自然资源部矿山地质灾害成灾机理与防控重点实验室,陕西 西安 710054; 3.长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安 710054)

Author(s):

LI Liang-zhong¹;  DENG Ya-hong¹; 2; 3*;  NIU De-xin¹

(1.School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,Shaanxi,China; 2.Key Laboratory of Mine Geological Hazards Mechanism and Control of Ministry of Natural Resources,Xi'an 710054,Shaanxi,China; 3.Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education,Chang'an University,Xi'an 710054,Shaanxi,China)

关键词:

沟屏障;  高速列车;  振动;  有限元;  隔离效果;  铁路路堤;  黄土地区

Keywords:

ditch barrier;  high-speed train;  vibration;  finite element;  isolation effect;  railway embankment;  loess area

分类号:

TU435

DOI:

10.19814/j.jese.2025.01032

文献标志码:

A

摘要:

随着高速铁路运营里程的不断增长,高速铁路长期运营所带来的环境振动问题越来越受到关注。目前,关于黄土地区高速列车振动特性的研究较为丰富,但是对于黄土地区高速列车隔振问题研究较少。以大西高速铁路某路堤段为原型,基于数值方法建立了高速列车轨道-路堤-沟屏障有限元模型,研究了沟屏障位置、深度、宽度、填充材料和截面形状以及列车速度对其隔振效果的影响,揭示了黄土地区高速铁路沟屏障的隔振规律。结果表明:沟屏障布设位置距离振源中心线越近,沟屏障前区域土体放大效应越弱,沟屏障后区域隔振效果越好且范围越广; 沟屏障隔振效果随着深度和宽度的增大而增强,且深度的改善幅度大于宽度; 填充材料与黄土性质差异越大,隔振效果越好; 倾斜侧壁能减弱空沟屏障和软性材料填充沟屏障前区域的振动放大效应,且随着侧壁倾角的减小,振动放大效应的削弱幅度越大,同时侧壁倾角的减小也会减弱沟屏障的隔振效果; 当列车以更高速度运行时,沟屏障前区域的振动放大效应会有所增强,但沟屏障后区域依然具有很好的隔振效果。

Abstract:

Along with the continuous increase in the operating mileage of high-speed railways, the environmental vibration problems caused by long-term operation of high-speed railways are receiving increasing attention. At present, there is a wealth of research on the vibration characteristics of high-speed trains in loess areas, but there is relatively little research on the isolation of high-speed trains in loess areas. A high-speed train track-embankment-ditch barrier finite element model was established based on numerical methods using the embankment section of Datong-Xi'an high-speed railway as a prototype; the influences of ditch barrier's position, depth, width, filling material and cross-sectional shape, as well as train speed on its vibration isolation effect were studied, and the vibration isolation law of high-speed railway ditch barriers in loess areas was revealed. The results show that the closer the location of the ditch barrier is to the centerline of vibration source, the weaker the amplification effect of soil in the front area of the ditch barrier, and the better and wider the vibration isolation effect behind the ditch barrier; the vibration isolation effect of ditch barrier increases with depth and width, and the improvement in depth is greater than that in width; the greater the difference in properties between the filling material and loess, the better the vibration isolation effect; the inclined sidewall can weaken the amplification effect in front of open ditch barrier and the ditch barrier filled with soft material, and the weakening amplitude of vibration amplification effect increases with the decrease of sidewall inclination angle, and the decrease in side wall inclination angle also weaken the vibration isolation effect of ditch barrier; when the train runs at a higher speed, the amplification effect of vibration in the front area of ditch barrier is enhanced, but it still has a good vibration isolation effect behind the ditch barrier.

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备注/Memo

备注/Memo:

收稿日期:2025-01-18; 修回日期:2025-03-02
基金项目:国家自然科学基金项目(41772275)
*通信作者:邓亚虹(1978-),男,湖南安化人,长安大学教授,博士研究生导师,工学博士,E-mail:dgdyh@chd.edu.cn。

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