关键词: 铁路沙害特征, 防护体系建设, 荒漠、半荒漠地带

Abstract: 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.

Key words: Sand hazard, Railway, Protectivesystem