荒漠,半荒漠地区建设铁路中风沙流防护体系的研究

荒漠、半荒漠地带铁路沙害的基本特征是沙侵道床、埋没轨道、磨蚀设备。因不同地带生态条件不同，引起铁路沙害可划分为四类九级。铁路沙害防护标准高，要求路基不风蚀、道床不污染、线路不积沙。根据沙害类型和生态条件，分有灌溉条件与无灌溉条件两种情况建立相适宜的经济防护体系，由前沿阻沙带、植物固沙带、铁路本体防护三部分组成

A STUDY ON PROTECTIVE SYSTEM OF WIND-SAND STREAM ALONG THE RAILWAY IN DESERT AND SEMIDESERT AREAS

The basical features of sand hazard along the railway are eroding ballast,covering track and wearing equipments in desert and semidesert areas.According to different regions and ecological conditions,the sand hazard along the railway was divided into four types and nine grades.The protective standard of sand hazard along the railway is high,it requires not to eroderoadbed,pollute ballast and accumulate sand on the road.According to the types of sand hazardand ecological conditions,two economic protective systems were established under irrigation and non irrigation conditions.The protective system is composed of sand checking region,sand fixing region and protective region of the railway itself.The paper also studied and discussed how to determine the main data in design.