路堑风吹雪灾害的形成和防治研究  

Research on the Formation of Wind-Blown Snow Disaster in Road Cuttingsand Their Prevention

作　　者：李赛 马文勇 Li Sai;Ma Wenyong(School of Civil Engineering,Shijiazhuang Tiedao University,Hebei,Shijiazhuang 050043,China;Key Laboratory of Road and Railway Engineering Safety,Ministry of Education,Shijiazhuang Tiedao University,Hebei,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Hebei,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄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,河北石家庄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,河北石家庄050043

出　　处：《铁道技术标准（中英文）》2024年第1期11-19,共9页Railway Technical Standard(Chinese & English)

基　　金：国家自然科学基金(52278511)。

摘　　要：风吹雪灾害是一种寒冷山区交通线路比较常见的自然灾害,现场调研发现路堑是风吹雪灾害最为严重的路基形式之一。本文针对路堑风吹雪灾害的形成和防治展开研究,基于Euler-Euler方法和Mixture模型模拟风雪两相流,同时利用现场实测数据验证模拟结果。研究典型路堑风吹雪灾害中风雪分布的演化过程,并比较分析不同形式路堑的风吹雪灾害特征,结果发现两侧边坡比小于1∶2的路堑风吹雪灾害最为严重。该类路堑严重的风雪灾害的形成原因是两侧边坡积雪的增加压缩了路面旋涡尺度,进而削弱了旋涡的回流加速作用。同时发现雪檐在推进到上风侧边坡中点前为安全储备期,此时上风侧边坡积雪量即为临界储雪量。Wind-blown snow disaster is a common natural hazard in cold mountainous areas,and field surveys find that road cutting is one of the roadbed types most vulnerable to wind-blow snow disaster.This study is focused on the formation and prevention of wind-blown snow disasters in road cuttings.The Euler-Euler method and Mixture model are used to simulate the two-phase flow of wind and snow,and the simulation results are validated using field measurements.The evolution process of wind and snow distribution in typical road cuttings affected by wind-blown snow disasters is investigated,and a comparative analysis of the disaster characteristics in different forms of road cuttings is conducted.The results show that wind-blown snow disasters are most severe in road cuttings where the slope ratio on both sides is smaller than 1∶2.The formation of severe wind and snow disasters in such road cuttings is attributed to the increased snow accumulation on both side slopes,which compresses the scale of the vortex on the road surface and weakens the backflow acceleration effect of the vortex.It is also observed that the snow cornice represents a safety reserve period until it reaches the midpoint of the windward slope,at which point the snow accumulation on the windward slope reaches the critical storage level.

关 键 词：交通线路 风吹雪灾害 积雪分布 路堑 

分 类 号：U212.34[交通运输工程—道路与铁道工程]