路侧波形梁护栏对分离式路基风吹雪雪害影响的仿真分析  

Simulation analysis on the influence of roadside corrugated beam guardrail on blowing snow hazards of separated subgrade

作　　者：彭国冬 刘梓伟 冯启江 张展硕 李浩瑄 PENG Guodong;LIU Ziwei;FENG Qijiang;ZHANG Zhanshuo;LI Haoxuan(Xilin Gol League Qian Tu Traffic Design Co.LTD,Xilinhot 026000,Inner Mongolia,China;School of Transportation,Jilin University,Changchun 130022,China;Jilin Province Expressway Group Co.LTD,Changchun 130022,China;Inner Mongolia Transportation Design and Research Institute Co.LTD,Hohhot 010010,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]吉林大学交通学院,吉林长春130022 [3]吉林省高速公路集团有限公司,吉林长春130022 [4]内蒙古交通设计研究院有限责任公司,内蒙古呼和浩特010010

出　　处：《冰川冻土》2023年第1期277-284,共8页Journal of Glaciology and Geocryology

基　　金：内蒙古自治区科技重大专项“内蒙古特殊环境公路灾变机理及综合防控成套技术研究”资助。

摘　　要：对内蒙古自治区多条公路调查发现,设置有防撞护栏的路段雪害严重。由于风吹雪现场监测受降雪量、风力、时间等诸多因素限制,因此本文采用计算机仿真“数字风洞”的方法,选择分离式路基中典型的路堤断面形式,建立路基模型和防撞护栏模型,定量分析不同防撞护栏设置参数下公路横断面风速流场特性及其影响关系。通过对路面风速控制点的数据及路面整体风速云图分析发现,防撞护栏阻碍风吹雪的流动,导致路面风速大幅度降低使大量雪粒子沉积到路面上造成道路积雪,故在风吹雪多发地区分离式路基路段可通过放缓边坡坡度或采用缆索护栏以确保路侧安全的同时消除或减少雪害的发生。本研究结果可为多雪地区公路分离式路基路侧安全设计与养护提供理论基础与参考依据。According to the investigation of several roads in Inner Mongolia Autonomous Region, it is found that the sections with collision guardrails have serious snow hazards. Due to the limit of many factors such as snowfall, winds, time and research period, it is difficult to monitor the snow drift on site. Therefore, the computer simulation “digital wind tunnel” is used to select the typical embankment section form in the separated subgrade, establish the subgrade model and collision guardrail model, and quantitatively analyze the characteristics and influence relationship of different collision guardrail setting parameters on the wind speed and flow field of highway section. Through the analysis of the data of the pavement wind speed control points and the overall wind speed cloud map of the pavement, the irregularity of the shape of the anti-collision guardrail hinders the flow of wind-blown snow, resulting in a significant reduction in the pavement wind speed, causing a large number of snow particles to deposit on the pavement, resulting in road snow. Therefore, in areas with frequent windblown snow, the separated subgrade section may slow down the slope gradient or use cable guardrail to ensure the safety of the roadside and eliminate or reduce the occurrence of snow damage. Therefore, this paper can provide theoretical basis and reference for the design and maintenance of roadside collision guardrail of highway separated subgrade in snowy areas.

关 键 词：公路 分离式路基 防撞护栏 风吹雪 仿真分析 

分 类 号：U417.1[交通运输工程—道路与铁道工程]