路基断面对风积雪影响分析

Analysis of Roadbed Section's Impact on Wind Snow

我国东北地区高速公路路基路面常受到风积雪的影响,严重影响了路基稳定性和行车安全。为了研究横断面形状对风积雪影响,将风雪二相湍流简化成纯空气单向湍流,建立Fluent流体力学模型,分析了气流经过不同路基横断面时流场的变化,发现负向加速度是导致路基路面积雪的内在原因,路基横断面形状和尺寸是影响积雪分布和积雪量的外在因素。

Investigations show that bigger angle air flow direction and route have ,more prone to snow disaster on the pavement. Simplified wind snow two -phase turbulence into pure air field unidirectional turbulence ,established Flu-ent fluid mechanics model to analysis the change of airflow flow field when airflow through the different subgrade cross section ,found that negative acceleration is the direct cause of snow cover ,cross section shape is the main reason that af-fects the distribution and the amount of snow cover .