The calculated results indicate that the common ballast embankment will raise permafrost temperature under the embankment base and make the permafrost embankment thermal unstable.
计算结果表明，普通道碴路基的修建将使路基下冻土的温度升高，使冻土路基出现热不稳定。
2
The interlayers that characterized as harden in middle and incompact in top and below widely occurred in the cement-stabilized-gravel when contrustruing the base course of pavement in permafrost area.