多年冻土区路堤边坡上遮阳板的稳定性分析

Stability Analysis of the Awning in Road Engineering in Permafrost Regions

在青藏铁路和青藏公路的施工建设中,许多主动保护冻土的措施已经被采用,遮阳板就是其中有效的降温措施之一.由于青藏高原风速较平原地区大,且会对建筑物造成一定的破坏,所以文章以高原平均风速最大的地区-安多地区的风速条件为例对遮阳板的稳定性进行数值试验,从而得出合理的遮阳板的结构参数,为今后施工和维护提供了科学依据.

There are a lot of active measures to protect permafrost adopted in the construction of the Qinghai-Tibet Railway and the Qinghai-Tibet Highway,of which an effective one is awning. The maximum wind velocity in the Tibetan Plateau is stronger than that in the plain, and brings about certain destroying to the buildings, therefore, in this article, the wind velocity condition of Amdo County, where the average wind velocity is maximal, is taken as an example to analyze the stability of awning, utilizing numerical simulation. The re-search results show that the height of the awning has significant influence on the structural stability, whereas, it has less impact on the thermal regime, and that the rational value ranges from 0. 4 m to 1.0 m in height of the awning, 1.5 m to 2.0 m in the interval space between the supporting angle irons, 1. 5 m to 2.0 m in the buried depth of the supporting angle iron. These researches provide a scientific basis for design, construction and maintenance of an awning.