风区高速铁路路基沙害防治研究与设计  

Sand Disaster Prevention Research and Design for High Speed Railway Subgrade in the Wind Zone

作　　者：辛文栋[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道工程学报》2015年第10期61-65,72,共6页Journal of Railway Engineering Society

摘　　要：研究目的:兰新第二双线通过的烟墩风区及百里风区,风速高,风沙流对高速铁路的危害严重,为有效的避免或减少沙害对无砟轨道铁路路基的危害,研究强风形成机理、风沙流活动规律、风沙两相流的特点,建立风区路基防沙对策技术体系,研究成果应用于本线的防沙设计与施工。研究结论:通过现场实测、室内试验、风洞试验以及数值分析等,研究戈壁风沙流的运动特征,得出:(1)主导风向与挡沙墙垂直时,防沙效果最佳,当挡沙墙与主导风向夹角逐渐变小时,挡沙墙的导沙作用明显;(2)挡沙墙高度2 m、透风率40%时挡沙效果最佳;(3)采用高立式挡沙墙阻沙,石方格沙障固沙的措施适宜于本线的风沙防治;(4)防沙工程有效地减轻了沙害对列车运营的影响,对于列车全天侯运行提供了技术保障;(5)该研究成果可为戈壁强风区风沙防治提供参考,为相关规范的修订提供理论技术支持。Research purposes： There is high wind speed in Xinjiang Hundred Kilometres Gale Area and Yandun Wind Zone where the second double high speed railway construction from Lanzhou to Xinjiang was designed through, the harm of sand - driving wind is serious. In order to effectively avoid and reduce the harm of the sand disaster to ballastless track railway, the formation mechanism of the strong wind and activity rules of wind sand flow and characteristics of wind sand two phase flow are studied, the technology system of countermeasures to sand prevention is established, and the research results are applied to sand prevention design and construction of the line. Research conclusions： Through field measurement, indoor test, wind tunnel test, and numerical analysis, and by analyzing the Gobi sand movement characteristics, the results have be demonstrated： （1） When the dominant wind direction and the direction of the retaining sand wall are vertical, effect of sand blocking of sand barrier is the best, when the angle of them is changed gradually to the small angle, effect of sand guiding of sand barrier is obvious. （2） While height of the retaining sand wall is 2 m and ventilation rate is 40% , the effect of sand prevention is remarkable. （3） Facilities of sand resistance such as high vertical sand barrier, measures of sand fixing such checkerboard sand barrier as stone box, these engineering measures are suitable for the line. （4） The influence of sand damage to normal operations of the train is reduced because of sand control engineering, and the technical support is provide for the train to run all day. （5） The research achievements can provide the reference for sand prevention of strong wind zone of Gobi, and provide the theoretical and technical support for the revision of the relevant standards.

关 键 词：风区 高速铁路 风沙流 对策 研究 设计 

分 类 号：U216.413[交通运输工程—道路与铁道工程]