Status of Aeolian-Sand Disaster and Estimation of Mechanical Sand-Controlling Benefit at Typical Sections of Qinghai-Tibet Railway

The field investigation into the aeolian-sand disaster along the section from Golmud to Lhasa of the Qinghai-Tibet Railway disclosed the following characteristics: relative concentrated aeolian-sand disasters in space-time;complex and diversified sand sources;mainly slight disasters;and severe potential hazard.Based on the combination of the in situ measurements on the aeolian-sand disasters at sections of Honglianghe,Beiluhe,Tuotuohe and Zajazangbu,Cuona Lake,with Google Earth images analysis,the authors calculated the sand accumulation quantity of the main sand-preventing facilities in the typical sections by methods of triangular pyramid,triangular prism and average trend simulation,approximating 1.32×105 m3.The result can provide scientific basis for constructing more effective sand controlling system.