Investigation of Wind Characteristics and Cooling Effects of Crushed-Rock Embankment with Different Pavement Widths in Permafrost Region

A crushed-rock embankment (CRE) with a high porous layer (CRL) can effectively cool the underlying permafrost through natural ventilation within layer. However, in addition to ambient conditions, efficiency of CRL and its cooling effect are significantly affected by pavement width. In this study, local wind flow around an section was first analyzed based on field monitoring data. Then, considering climate warming, 2-D coupled model heat mass transfer established investigate characteristics effects CRE different widths. The results showed that width exerted considerable impacts CRE. These were evaluated via variations speed, table, soil temperatures. An increase lower speed CRL, which is adverse long-term thermal regimes permafrost. addition, due differential flows embankments, asymmetric distribution temperatures beneath windward leeward sides embankments existed. Overall, it hoped study provide informative references for Qinghai–Tibet expressway constructed regions.