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以青藏铁路五道梁片石路基为研究实例,分析了片石层的工作原理,并与一般路基不同位置处的地温进行了比较,认为片石路基有利于保护冻土地温.在考虑空气对流作用的前提下,对五道梁片石路基进行了地温预测,结果表明,在预测前30年还能有效地保护冻土,而50年后其人为上限出现下凹形态.
Taking the Qinghai-Tibet Railway Wudaowang stone pavement as an example, the working principle of the stone pavement is analyzed and compared with the ground temperature at different positions of the general roadbed, it is considered that the stone-paved roadbed is helpful to protect the ground temperature of the frozen soil.Based on the premise of considering the air convection , The ground temperature prediction of Wudaoliang stone subgrade was carried out. The results show that the frozen soil can be effectively protected 30 years before the prediction, while the artificial upper limit appears concave after 50 years.