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黄土是一种典型的结构性土体。黄土地区的许多工程事故、地质灾害都与黄土的亚稳定结构密切相关,而黄土类回填土是最典型的结构破坏黄土。该文结合室内试验与数值模拟,开展了填土与天然土边坡稳定性对比分析。结果表明:填土边坡与天然黄土边坡的渗流场不同,在等量灌溉下,前类边坡黄土饱和度明显大于后类边坡饱和度;相应地,回填黄土的抗剪强度及粘聚力更低,这是造成填土边坡失稳的内在因素。显然,黄土结构对于黄土边坡稳定性具有显著影响。
Loess is a typical structural soil. Many engineering accidents and geological disasters in the loess area are closely related to the metastable structure of loess, while loess backfill is the most typical structural loess. In this paper, a comparative analysis of slope stability between filled earth and natural soil is carried out with indoor tests and numerical simulation. The results show that the seepage field of fill slope and natural loess slope is different. Under equal irrigation, the loess saturation of front slope is obviously greater than that of the back slope. Correspondingly, the shear strength and viscosity of backfilled loess Cohesion is lower, which is caused by the instability of fill the inner factors. Obviously, the loess structure has a significant influence on the loess slope stability.