目前研究寒区土质边坡冻融滑塌的方法很多，大多没有考虑坡端阻力的影响。基于块体的极限平衡理论，在假定春融期边坡的滑移面为平行于坡面的平面且滑动体下部受坡端阻力作用的条件下，用极限平衡法推导了寒区土质边坡冻融滑塌安全系数的解析表达式，并讨论解析式中的各项参数对边坡稳定性的影响，表明春融期粘聚力 c对边坡安全系数的影响显著。通过对工程实例的计算分析，比较了理论公式和数值模拟计算结果的差异，证明了理论公式可以应用于实际工程之中，对春融期土质边坡滑塌治理有很好的指导意义。%At present ,there are many studies of freez-thaw sliding collapse of soil slopes in cold regions ,but the effect of slope-side resistance is hardly considered in any of these .Based on the limit equilibrium theory of the block ,the ana-lytic expression of freeze-thaw sliding collapse coefficient of soil slopes in cold regions was deduced on the assumption that the slip plane of the slope was parallel to slope surface plane at the spring thawing period ,and the bottom of the sliding plane was affected by slope-side resistance force .And then the influences of various parameters of the analytic expres-sion on the slope stability were discussed .It was concluded that the cohesive force at the spring thawing period had a sig-nificant impact on the slope safety factor .In an actual engineering project ,the results of the theoretical formula and sim-ulation calculation were compared .It is proven that the theoretical formula can be applied to practical engineering and will be of great guidance to the collapse control of soil slopes at spring thawing period .
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