和田-若羌铁路风沙区段选线研究

Study on Route Selection of Hotan-Ruoqiang Railway in Windblown sand area

和田-若羌铁路位于新疆维吾尔自治区和田地区和巴音郭楞蒙古自治州境内,沿线经过流动沙丘、流动沙地、半固定沙丘、半固定沙地等不良地质区段,沙丘移动和风沙流会对铁路造成危害。本文从风沙的来源、风向、沙丘移动距离,年输沙量、铁路沿线风沙段落的分布特点及其危害程度、水文地质工程地质特征等方面进行了系统分析,提出了植物防护与工程防护相结合的治沙措施,给出了风沙地区铁路勘测的具体内容以及选线原则。针对各区段的特点分别设计了多种线路过风沙区方案。经综合比选,建议流动沙丘段采用以桥代路方案,车尔臣河以东苏中农场区段采用靠近在建高速公路方案,新月形沙丘链段采用桥梁通过方案。

The Hotan-Ruoqiang Railway is located in Hotan area of Xinjiang Uygur Autonomous Region and in Bayingoleng Mongolian Autonomous Prefecture.Along the line,it passes through unfavorable geological sections,such as mobile sand dunes,mobile sandfields,semi-fixed dunes and semi-fixed sandfields.The sand dune movement and wind-sand currents are harmful to the railway.By systematic analysis of the source of wind and sand,wind direction,distance of sand dune movement,annual sand transmission,distribution characteristics and hazards of wind-sand section along the railway,and the hydrogeological and engineering geological characteristics,etc.,this paper proposes sand control measures that combine plant protection with engineering protection,and shows the specific content of railway survey and the principles of route selection in windblown sand areas.According to the characteristics of each section,a variety of routes through the windblown sand area were designed.After comprehensive comparison and selection,it is recommended to use bridges instead of roads in the mobile dune section.The scheme close to the highway under construction is adopted for Suzhong farm area in the east of the Cheerchen River,and the bridge-passing scheme for the crescent-shaped sand dune chain.