路基边坡遮阳板下风速变化模拟计算探讨

Simulative Analysis of the Wind Speed Variation under the Awning of an Embankment Side-Slope

在青藏公路、青藏铁路以及青康公路等寒区路基工程中,为确保道路交通的安全通畅,各种主动保护多年冻土的工程措施也相应地应用到实际的工程中去,路基边坡遮阳板是主要措施之一.通过对不同净空遮阳板下风速的模拟计算,结果表明:遮阳板的净空高度以最低不小于20 cm,最高以不超过70 cm条件下风速达到最大值,对比实际工程,建议最佳高度以50 cm为宜.通过计算总结出遮阳板下风速变化与遮阳板净空及初始风速的半经验公式,为寒区工程路基边坡防护提供了参考依据.

In order to protect the frozen soil of the embankments on cold regions,and to ensure the safety of road traffic,almost all the initiative measures to protect the permafrost were adopted to the actual engineering now.The awning is one of the main measures,which is used on the side slopes of the Qinghai-Tibet Highway,Qinghai-Tibet Railway and Qingkang Highway embankments.The simulation results show that it is better when the headroom of the awning is not less than 20 cm and t not more than 70 cm.The best of a...