首页|八车道高速公路风吹雪积雪分布特征及路堤高度相关性研究

八车道高速公路风吹雪积雪分布特征及路堤高度相关性研究

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为研究八车道高速公路风吹雪积雪分布特征以及路堤高度对风吹雪的影响.基于室外模型试验方法,研究不同路堤高度下路堤周围速度流场、积雪分布规律和演化过程;基于数值模拟试验方法,对不同路堤高度下周围速度流场变化进行研究,并与室外模型试验速度流场变化结果比较,验证数值模拟结果的准确性;基于路面积雪量和积雪深度评估不同路堤高度抵御灾雪能力.结果表明:当风吹雪运动到路堤时,受到路堤阻碍产生速度分区,分别形成气流减速区、气流加速区、气流高速区、气流涡流回旋区和气流恢复区,路堤背风侧气流减速区面积明显大于路堤迎风侧;在路堤路面处,气流速度先降低后升高且在路堤背风侧路肩达到最大.路堤积雪主要发生在迎风侧,路面上有较多积雪,背风侧积雪较少.路堤周围速度流场特性与路堤高度密切相关,气流流过路堤迎风侧与背风侧周围形成风速减弱区与路堤高度正相关.通过对比 3 种不同路堤高度路面积雪量,0.3 m高度路堤路面积雪量最大,路面积雪最深,风吹雪环境下最不利.因此,通过设置合理路堤高度,可以改善路堤周边风速流场并减弱风吹雪灾害,从而起到阻雪作用.
Study on the distribution characteristics of wind-blown snow on an eight-lane expressway and the correlation of embankment heights
In order to study the distribution characteristics of wind-blown snow on eight-lane expressway and the influence of embankment height on wind-blown snow.The outdoor model test method was used to analyze the velocity flow field,snow distribution law and evolution process around the embankment at different embankment heights,the velocity flow field around the embankment and the snow distribution law were comparatively analyzed.The numerical simulation method is used to study the changes of the surrounding velocity flow field at different embankment heights,and the numerical simulation of the velocity flow field changes is compared with the change of the velocity flow field of the outdoor model test to verify the accuracy of the numerical simulation results.Based on the amount of snow in the road area and the depth of snow cover,the ability of different embankments to withstand snow disasters was evaluated.The results show that when the wind and snow move to the embankment,the speed zone is caused by the hindrance of the embankment.The airflow deceleration zone,airflow acceleration zone,high-speed zone,vortex swing zone and airflow recovery zone were formed,and the area of the deceleration zone on the leeward side of the embankment was significantly larger than that on the windward side of the embankment.At the embankment pavement,the air velocity first decreases and then increases,reaching the maximum on the leeward side of the embankment.The snow accumulation of the embankment mainly occurs on the windward side,there is very little on the leeward side,and there is more snow on the road surface.The flow field characteristics of the embankment are closely related to the height of the embankment,and the wind speed attenuation zone formed around the windward side and leeward side of the embankment is positively correlated with the height of the embankment.By comparing the snow in the road area of three different heights,the 0.3 m embankment road has the largest snowfall,the deepest snow on the road surface,and the most unfavorable in the windswept snow environment.Therefore,by setting a reasonable embankment height,the flow field around the embankment can be improved and the wind and snow can be weakened,which can play a role in snow resistance.

eight-lane expresswayembankmentsnow cover distributionwind-blown snowoutdoor model testnumerical simulation

王凤龙、刘杰、杨治纬、王勇、石煜

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新疆农业大学 交通与物流工程学院,新疆 乌鲁木齐 830000

新疆交通规划勘察研究设计研究院有限公司,新疆 乌鲁木齐 830000

中国葛洲坝集团市政工程有限公司,湖北 宜昌 443000

八车道高速公路 路堤 积雪分布 风吹雪 室外模型试验 数值模拟

交通运输行业重点科技项目新疆交通运输科技项目新疆交投集团2021年度"揭榜挂帅"科技项目新疆交通设计院科技研发项目乌鲁木齐西绕城高速公路风吹雪分布、成因、防治技术集成及推广应用科研项目

2022-ZD6-0902022-ZD-006ZKXFWCG2022060004KY2022021501KY2022042504

2024

10.13577/j.jnd.2024.0507

自然灾害学报
中国地震局工程力学所 中国灾害防御协会

自然灾害学报

CSTPCD北大核心
影响因子：0.862
ISSN：1004-4574
年,卷(期)：2024.33(5)
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