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.

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. [ABSTRACT FROM AUTHOR]