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为了研究碎石护坡对冻土区路基温度场的影响,以青藏铁路试验段现场观测的气候和地质资料为上边界条件,运用带相变瞬态温度场有限元数值解法,对不同厚度的碎石护坡路基进行了分析。结果表明:粒径为10 cm的碎石护坡对多年冻土区路基的稳定性有保护作用;碎石护坡对路基坡脚附近地温影响较大,采用碎石护坡对防止路基纵向裂缝的产生有一定的作用;实际应用中碎石层厚度不能太厚。
In order to study the influence of rubble slope protection on the temperature field of embankment in permafrost region, taking the observed climate and geological data of the Qinghai-Tibet Railway as the upper boundary conditions, the finite element method of transient temperature field with phase transition was used to analyze the influence of different thickness Stone slope protection roadbed was analyzed. The results show that the gravel slope protection with the particle size of 10 cm has a protective effect on the stability of roadbed in the permafrost region. The gravel slope protection has a great influence on the ground temperature near the foot of the roadbed slope. A certain role; practical application of gravel thickness can not be too thick.