Liu Xiaolan, Fu Chuanwei, Cheng Xinglei
Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Chengjian University, Tianjin, China.
PLoS One. 2025 Jan 30;20(1):e0317916. doi: 10.1371/journal.pone.0317916. eCollection 2025.
The runway in permafrost regions has remarkable temperature sensitivity. Therefore, this paper puts forward to the parallel perforated ventilation subgrade. The reliability and validity of the finite element model of the runway with the parallel perforated ventilation subgrade are verified by comparing with the previous studies. And the cooling effect of the parallel perforated ventilation subgrade is analyzed. Results show that the parallel perforated ventilation subgrade has a significant cooling effect on the pavement and has little cooling effect in the natural ground. Compared with the non-ventilation subgrade, temperature time-history curves for the parallel perforated ventilation subgrade change periodically each year and are gradually lower with the growth of time. Temperature-depth curves for the parallel perforated ventilation subgrade change significantly at the insulation layer, the crushed rock layer, and the perforated ventilation. The air velocity and working time of the parallel perforated ventilation have no effect on the temperature of the surface layer, base layer, and subbase layer, have little effect on the temperature of the insulation layer, and have great effect on the temperature of the crushed rock layer and subgrade. This study provides scientific support for the design, construction, and maintenance of the runway in permafrost regions.
多年冻土地区的跑道具有显著的温度敏感性。因此，本文提出了平行多孔通风路基。通过与以往研究对比，验证了平行多孔通风路基跑道有限元模型的可靠性和有效性。并分析了平行多孔通风路基的降温效果。结果表明，平行多孔通风路基对路面有显著的降温效果，对天然地基的降温效果较小。与非通风路基相比，平行多孔通风路基的温度时程曲线每年周期性变化，且随时间增长逐渐降低。平行多孔通风路基的温度深度曲线在保温层、碎岩层和多孔通风处变化显著。平行多孔通风的风速和工作时间对表层、基层和底基层的温度没有影响，对保温层的温度影响较小，对碎岩层和路基的温度影响较大。本研究为多年冻土地区跑道的设计、施工和维护提供了科学依据。
