高温冻土区开放新型复合护坡路堤热稳定性研究

在全球升温和人类工程活动下,高温冻土区块碎石护坡路基需要补强措施。研究人员提出了一种新的补强措施新型复合护坡结构。本文考虑青藏高原的气温特征和冷暖季风速差异的影响,基于非Darcy定律利用有限体积法对开放新型复合护坡结构的热传递特性和热稳定性进行了研究,研究发现边界条件对新型复合护坡路基的热传递特性有明显的影响,开放新型复合护坡结构较封闭系统具有较好的冷却效果和较快的降温速度。

STUDY ON THERMAL STABILITY FOR A NEW EMBANKMENT WITH OPEN COMPOSITE SLOPE PROTECTION IN WARM PERMAFROST REGIONS

Under the impact of climate warming and human engineering activities, the embankment with crushed rock slope protection needs the strengthening techniques in warm permafrost regions. Researchers have proposed a good strengthening technique, namely a new composite slope protections for the embankment. Considering the characteristic of air temperature and wind velocity difference between cold months and warm months, the heat transfer and thermal stability of the new embankment with open composite slope protections are studied and analyzed on the base of the non-Darcy flow using finite volume method. The results show that the boundary condition has distinct effect on the characteristic of heat transfer, and that the new embankment with open composite slope protections has better cooling effect and greater cooling rate than the new embankment with closed composite slope protections.