冀西北地区高速公路防雪网板数值模拟研究

Numerical simulation of snow screen on expressway in north west Hebei

公路是现代文明的重要标志,也是经济和社会发展的根本需求。确保公路的正常运行是社会发展的基础。冀西北地区特殊的地形特征和气候条件,使得该地区公路极易形成风积雪灾害,造成交通瘫痪,道路封闭,影响居民正常出行,给该地区人民的生活带来了极大的不便。针对冀西北寒冷地区的地形地貌和气候特点,借助Fluent软件,对不同形状、不同孔隙率的防雪网板前后风速流场变化进行数值模拟,得出防雪网板设计的最佳参数,并运用到实际工程中,对改善冀西北地区高速公路风积雪灾害,保障公路正常通行具有重要实际意义。为冀西北地区高速公路风积雪的防治措施提供一个切实可行的方案。通过分析研究得出以下结论:孔隙率为20%和30%的网板防雪效果优于其他孔隙率网板;有折角的蝶形网板在相同孔隙率情况下比平面网板防雪效果好。

Highway is an important symbol of modern civilization,but also the basic needs of economic and social development.To ensure the normal operation of the highway is the foundation of social development.Due to the special topographical features and climatic conditions in the northwest of Hebei,the highways in the region are prone to snow disaster,causing traffic paralysis,road closures and affecting the normal travel of residents,brought great inconvenience to the life of the people in the area.In this paper,according to the characteristics of topography and climate in the cold area of northwest Hebei province,with the help of Fluent software,the changes of wind velocity and flow field before and after the snow screen with different shape and different porosity are simulated,the optimum parameters of snow-proof net board design are obtained and applied to practical projects,which is of great practical significance to improve the snow disaster of expressway in northwest Hebei province and ensure the normal traffic of highway.To provide a practical solution for the prevention and control of snowstorm on the highways in northwest Hebei.The results show that the snow-proof effect of mesh with 20%and 30%porosity is better than that of other mesh with porosity.