风致路堑积雪演化过程试验与模拟研究  

Tests and simulation for evolution process of wind-induced cutting snow accumulation

作　　者：马文勇 李江龙[1] 孙元春 李赛 白建方 MA Wenyong;LI Jianglong;SUN Yuanchun;LI Sai;BAI Jianfang(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Road and Railway Engineering Safety,Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Structural Mechanics Behavior and System Safety in Traffic Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Wind Engineering and Wind Energy Utilization Engineering Technology Innovation Center of Hebei Province,Shijiazhuang 050043,China;China Railway Design Corporation,Tianjin 300251,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043 [4]河北省风工程和风能利用工程技术创新中心,石家庄050043 [5]中国铁路设计集团有限公司,天津300251

出　　处：《振动与冲击》2023年第9期284-292,共9页Journal of Vibration and Shock

基　　金：河北省自然科学基金(E2021210053)。

摘　　要：路堑是交通线路常见的路基断面形式,因断面构造特征较路堤更容易发生风致雪灾害。为了给实际道路断面形式设计和风吹雪灾害防治提供建议和参考,采用风洞试验与数值模拟方法,研究了4种不同开敞形式的路堑在不同风速下风致雪漂移堆积演化过程,分析了风速和路堑开敞形式对积雪分布和演化过程的影响,并基于路面积雪量和积雪深度评估了不同路堑抵御雪灾害能力。结果表明:当上风侧边坡坡度大于下风侧边坡坡度时,路堑路面积雪量最少,路面的积雪最薄;增大风速和增加持续时间会加剧路面积雪,是影响积雪分布的重要因素;改变路堑边坡对减少路面积雪量作用有限,需设置其他防治措施来减轻道路风致雪灾害。Cutting is a common form of subgrade section for traffic lines.Due to its section structural characteristics,it is more likely to have wind-induced snow disasters than embankment.Here,to provide suggestions and reference for design of actual road section form and prevention and cure of wind-blown snow disasters,wind tunnel tests and numerical simulation methods were used to study evolution processes of wind-induced snow drift and accumulation with 4 different cutting open forms under different wind speeds,effects of wind speed and cutting open form on distribution and evolution process of snow cover were analyzed,and different cuttings’abilities to resist snow disasters were evaluated based on snow cover amount and depth on road surface.The results showed that when slop of windward side is larger than slope of leeward side,snow amount on cutting surface is the least,and snow thickness on road surface is the thinnest;increasing wind speed and duration can aggravate snow cover on road surface,so it is an important factor affecting distribution of snow cover;changing cutting slope has limited effect on reducing snow amount on road surface,and other prevention and cure measures need to be taken to reduce wind-induced snow disasters.

关 键 词：风吹雪 路堑 风洞试验 数值模拟 雪堆积 

分 类 号：U213.12[交通运输工程—道路与铁道工程]