浅槽风力加速堤对公路风雪流影响的因子分析  

Factor analysis of the impact on highway snow drift by shallow channel wind acceleration embankment

作　　者：彭国冬 张思源 刘梓伟 孙斌 PENG Guodong;ZHANG Siyuan;LIU Ziwei;SUN Bin(Xilingol League Qian Tu Traffic Design Co.Ltd.,Xilinhot 026000,Inner Mongolia,China;Inner Mongolia Transportation Design and Research Institute Co.Ltd.,Hohhot 010010,China;Transportation College of Jilin University,Changchun 130022,China)

机构地区：[1]锡林郭勒盟乾图交通设计有限责任公司,内蒙古锡林浩特026000 [2]内蒙古交通设计研究院有限责任公司,内蒙古呼和浩特010010 [3]吉林大学交通学院,吉林长春130022

出　　处：《冰川冻土》2023年第5期1516-1521,共6页Journal of Glaciology and Geocryology

基　　金：内蒙古自治区科技重大专项(zdzx2018041)资助。

摘　　要：以内蒙古锡林郭勒盟207国道的浅槽风力加速堤为研究对象,对其断面构成因子、风速流场、积雪情况等进行了为期3年的定位观测。结果表明:气流流经浅槽风力加速堤断面时,在加速堤迎风坡脚、浅槽背风弧面、浅槽最深处、迎风路基坡脚和背风路基坡脚5个部位形成减速区域,导致雪粒堆积;而在加速堤迎风坡上部、顶部、浅槽迎风弧面、迎风路肩4个部位形成增速区域,引起雪粒沉积。通过对浅槽风力加速堤的五个主要参数背风弦长(L_(1))、迎风弦长(L_(2))、浅槽深(H)、弦深比(L/H)、背风/迎风弦长比(L_(1)/L_(2))进行回归分析发现,路面是否积雪的最重要影响因素为浅槽风力加速堤的背风/迎风弦长比(L_(1)/L_(2))。同时,研究发现浅槽风力加速堤的槽内是否积雪与浅槽风力加速堤的弦深比无关。路面积雪程度受断面参数的影响表现出不同,在实践中可通过计算相关参数判断浅槽风力加速堤所处路段是否发生积雪。Taking the shallow channel wind acceleration embankment on the national highway G207 in Xilingol League,Inner Mongolia,as the research object,the section composition factors,wind speed and flow field,and snow cover were observed for three years.The research results indicate that when the airflow passes through the section of the shallow channel wind acceleration embankment,a deceleration zone is formed at the foot of the windward slope,the leeward curved surface of the shallow channel,the deepest part of the shallow channel,the foot of the windward roadbed slope,and the foot of the leeward roadbed slope,resulting in the accumulation of snow particles.At the upper part,top,shallow channel,windward curved surface,and windward shoulder of the accelerating embankment,a growth zone is formed,causing snow particle deposition.Through regression analysis of the five main parameters of the shallow channel wind acceleration embankment,including leeward chord length(L_(1)),windward chord length(L_(2)),shallow channel depth(H),chord depth ratio(L/H),and lee⁃ward chord length/windward chord length ratio(L_(1)/L_(2)),it was found that the most important influencing factor on whether snow accumulates on the road surface is the leeward chord length/windward chord length ratio(L_(1)/L_(2))of the shallow channel wind acceleration embankment.At the same time,the study found that whether snow accumulates in the channel of the shallow channel wind acceleration embankment is not related to the chord depth ratio of the shallow channel wind acceleration embankment.Degree of snow on the road surface varies de⁃pending on the cross-sectional parameters,and in practice,it is possible to determine whether snow has accumu⁃lated on the road section where the shallow channel wind acceleration embankment is located by calculating rele⁃vant parameters.

关 键 词：浅槽风力加速堤 公路 风雪流 积雪 

分 类 号：U418.56[交通运输工程—道路与铁道工程]