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 infuence 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.
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