风沙地区高速铁路综合选线原则研究

Study on Comprehensive Route Design Criteria of High-speed Railway in Wind-sand Area

风沙灾害威胁着沙区铁路建设运营,由于高速列车具有速度快、车体轻的特点,线路在穿越风沙地带时受到的风沙流威胁更大。为在选线设计时就将线路风沙危害尽可能地减小,通过分析风沙流对高速铁路建设和运营的影响机理,针对风沙地区特殊的自然条件,结合铁路选线基本理论与方法,提出风沙地区高速铁路综合选线原则及风沙流区、戈壁区、大风区的高铁线路选线设计要点。以兰新高铁为例,通过详细勘察风沙区和分析现有资料,从线路走向方案设计、工程投资、环境影响等方面研究风沙地区高速铁路综合选线原则在实际线路工程中的应用,并确定了高速铁路在风沙地区较为合理的线路设计方案。经过兰新高铁多年的实际运营表明:该方法具有较好的工程应用性,可为今后风沙地区高速铁路选线设计提供一定参考。

Wind-sand disaster threatens the construction and operation of railway in sandy area.As the high-speed train is swift in speed and light in weight,the railway is more threatened by wind sand flow when it traverses through the wind-sand area.In order to minimize the wind-sand hazard to the railway during route design,comprehensive route design criteria of high-speed railway in wind-sand area and the key points of high-speed railway alignment design in quicksand region,Gobi area and gale area are put forward by analyzing the influence mechanism of wind sand flow on the construction and operation of high-speed railway,based on the special natural conditions of wind-sand area and combined with the basic theory and method of railway alignment design.Taking the Lanzhou-Urumqi High-speed Railway as an example,this paper studies the application of the principle of comprehensive route design in strong wind-sand region from the aspects of route scheme design,project investment and environmental impact based on detailed investigation of wind blown sand area and analysis of existing data,and then a scientific and reasonable route design scheme of high-speed railway in wind-sand area is determined.Years of practical operation of the Lanzhou-Urumqi High-speed Railway shows that this method has good engineering application and can provide certain references for the route design of high-speed railway in wind-sand area in the future.