季节性冻土地区根-土复合体土质边坡稳定性分析

为了研究季节性冻土地区根-土复合体土质边坡稳定性，通过分析土体强度参数、融化层深度、融化层重度及坡度对根-土复合体土质边坡稳定性的影响，模拟了春融期土坡温度场及水分场的变化特征，运用强度折减法计算了春融期素土及根-土复合体边坡的安全系数。结果表明：春融期，素土及根-土复合体边坡在冻融界面处剪切塑性应变集中，呈条带状分布，沿着冻融界面发生平面状热融滑塌；相比素土边坡，根-土复合体边坡安全稳定系数明显增大。由此可得，植物根系穿过冻融界面处时，增加了根系周围土体强度，提高了边坡安全稳定，为季节性冻土边坡工程的设计、施工和维护提供有效的科学依据及必要的数据参考。

Stability analysis of soil slope of root-soil complex in seasonal frozen soil region

In order to study the seasonal frozen soil area root soil composite soil slope stability, through the analysis of the soil strength parameters, melt layer depth, heavy melting layer and the effect on the stability of the slope soil to root complex soil slopes, simulates the spring melt period change characteristics of soil temperature field and moisture field, the spring melt period is calculated by using the strength subtraction element composite soil and root soil slope safety factor. The results show that the shear plastic strain of plain soil and root soil complex slope is concentrated at the freezing-thawing interface in spring thawing period, and the shear plastic strain is banded, and the plane thermal thawing collapse occurs along the freezing-thawing interface. Compared with plain soil slope, the safety and stability coefficient of root-soil complex slope increases obviously. It can be seen that when plant roots pass through the freezing-thawing interface, the strength of soil around the roots increases, and the safety and stability of the slope is improved. It provides effective scientific basis and necessary data reference for the design, construction and maintenance of slope engineering in seasonal frozen soil.