Characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences  

作　　者：LEI Jia CHENG Jianjun GAO Li MA Benteng AN Yuanfeng DONG Hongguang 

机构地区：[1]College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi 832003,China

出　　处：《Journal of Arid Land》2023年第8期901-919,共19页干旱区科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52168065).

摘　　要：Railways built in cold,snowy,and lightly populated areas are subjected to wind and snow disasters.In this study,we selected a snow hazard prevention and control section of the Altay–Zhundong Railway in Xinjiang Uygur Autonomous Region of China as the research object.We investigated the deposited snowfall variation characteristics on the two sides and in the embankment pavement area of snow fences with different porosities,fence heights,and arrangement distances using single-factor tests and orthogonal tests based on global atmospheric reanalysis climate data,field survey data,and a multi-phase flow analysis model.The results showed significant differences in the characteristics of snow cover distribution and snow cover thickness between the embankment and the cutting in the absence of snow protection measures.The maximum snow cover thickness of the embankment pavement decreased by 12.6%relative to the cutting pavement.The snow cover thickness of the embankment exhibited an increasing trend from windward shoulder to leeward shoulder,whereas the snow cover thickness of the cutting presented a declining trend from windward shoulder to leeward toe.In the collaborative prevention and control of snow fences and embankments,the three factors can be ranked in terms of their sensitivity to deposited snowfall within the influence scope of snow fences as follows:fence height>arrangement distance>porosity.At the same time,fence height yielded a significant relationship for the influence scope of snow fences(P<0.05).The three factors can also be ranked in terms of their sensitivity to deposited snowfall on the pavement as follows:porosity>fence height>arrangement distance.For the embankment protection of the Altay–Zhundong Railway against wind and snow,snow fence with a porosity of 75%,a fence height of 4.8 m,and an arrangement distance from the embankment of 60 m produced the best snow control effect.By revealing the characteristics of snow cover distribution along railway subgrade and the protective effect of snow fence

关 键 词：SNOWDRIFT numerical simulation orthogonal test porosity fence height arrangement distance Altay-Zhundong Railway 

分 类 号：U216.412[交通运输工程—道路与铁道工程]