Mechanisms of the formation of wind-blown sand hazards and the sand control measures in Gobi areas under extremely strong winds along the Lanzhou-Xinjiang high-speed railway

作     者：Jianjun QU Tao WANG Qinghe NIU Benli LIU Lihai TAN Qingjie HAN Yang GAO Jianhua XIAO Qu J;Wang T;Niu Q;Liu B;Tan L;Han Q;Gao Y;Xiao J

作者机构：Key Laboratory of Desert and Desertification/Dunhuang Gobi and Desert Ecology and Environment Research StationNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)Guangzhou511458China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2023年第66卷第2期

页      面：292-302页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.41730644 41901011&41771010) 

主　　题：Gobi areas with extremely strong winds Wind-blown sand hazards Complex terrain Sand/gravel flow Wind-blown sand control 

摘      要：The Lanzhou-Xinjiang high-speed railway(HSR)traverses areas of the Gobi Desert where extremely strong winds are *** strong winds cause sand/gravel hazards,an unaddressed issue that often seriously compromises the safe operation of the *** paper studies the mechanisms leading to wind-blown sand hazards and the outcomes of sand control projects in these *** main findings are as follows:(1)Cold northern airflows over the Tian Shan mountain range are accelerated by the wind tunnels and downslope effect as they pass over complex terrain comprising passes,gullies,and proluvial ***,the wind intensity often increases two-to threefold,creating frequent high-speed winds that lead to severe sand damage along the HSR.(2)In the Gobi areas with extremely strong winds,sand grains can be lifted as high as 9 m from the ground into the air,far higher than in other areas of the *** sand transport rate decreases exponentially with increasing *** wind speed and particle size determine saltation *** particles and stronger winds provide the particles with a higher kinetic energy as they collide with the *** the wind zones of Baili and Yandun,the analysed study areas,the saltation layer height of wind-blown sand/gravel exceeds 3 and 2 m,respectively.(3)Based on the above findings,recently emerging sand control materials,suitable for the areas of interest,were screened and ***,under the proposed principle of‘supplementing blocking with trapping’,a comprehensive sand control measure was established,featuring sandblocking belts comprised of multiple rows,and high,vertical sand-trapping installations with a large grids *** installed system showed a high efficacy,reducing sand transport rate by 87.87%and significantly decreasing the deposition of sand along a trial section of the HSR.