Permafrost in the Qinghai-Tibet Plateau (QTP) accounts for a total area of 1.05 × 10 km. Many highway engineerings have been through the permafrost regions of the QTP, including the Qingkang Highway (QKH), Qinghai-Tibet Highway (QTH), and Gonghe-Yushu expressway (GYE), and the Qinghai-Tibet expressway (QTE) will be constructed in the future. Under the action of roadbed construction and global warming, permafrost under roadbed is degraded and causes serious pavement damage. Although many useful cooling measures have been applied to prevent permafrost degradation, their application presents significant challenges on account of the stronger endothermic action of asphalt pavement. This paper summarizes the working principle of existing cooling measures, and ascertains the relationship between pavement damage and ground temperature distribution of permafrost under roadbed. Based on the relationship, geotemperature distribution criteria and requirements for the cooling measures are proposed, and some suitable composite structures and measures are suggested. The results reported in this paper can provide a valuable guidance for the design and construction of the QTE in the future.

中文翻译：

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降温措施在青藏高原多年冻土区公路路基中的应用

青藏高原多年冻土总面积1.05×10 km。青藏高速公路（QKH）、青藏高速公路（QTH）、共和玉树高速公路（GYE）等多项公路工程已穿越青藏高原多年冻土区，并将建设青藏高速公路（QTE）将来。在路基建设和全球变暖的作用下，路基下的多年冻土发生退化，造成路面严重损坏。尽管已经应用了许多有用的冷却措施来防止永久冻土退化，但由于沥青路面具有更强的吸热作用，它们的应用提出了重大挑战。总结了现有降温措施的工作原理，探明了路面损伤与路基下多年冻土地温分布的关系。根据该关系，提出了地温分布标准和降温措施要求，并提出了一些合适的复合结构和措施。本文报告的结果可以为未来QTE的设计和构建提供有价值的指导。