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为研究坡顶加载条件下黏性土坡的承载特性和变形规律,进行了素土坡和土钉加固土坡的加载离心模型试验。测量了土坡的承载和变形过程。通过对比两种土坡的承载特性和变性规律,土钉的加固作用体现在:限制了土坡向坡面方向的位移,使土坡的承载能力得到了明显提高;在加固土坡内形成的土钉影响区域改善了加载底板边缘处的薄弱程度;增大了土坡中上部土体的竖向压缩变形,减小了剪切变形,增强了土坡的稳定性。土坡上部土钉的加固效果随着坡顶荷载的增大而越明显;土坡中下部土与土钉的相互作用越靠近坡面越强。
In order to study the bearing behavior and deformation of cohesive soil slopes under the condition of top loading, centrifuge model tests on soil slopes and soil nailing were carried out. The bearing and deformation processes of soil slopes were measured. By comparing the bearing characteristics and degeneration law of two types of soil slopes, the reinforcing effect of soil nailing is as follows: the displacement of soil slope to the slope is limited, and the carrying capacity of soil slope is obviously improved; Soil-nail-affected areas improve the weakness of the load floor edge; increase the vertical compression deformation of the upper soil in the soil slope, reduce the shear deformation, and enhance the stability of the soil slope. The effect of soil nailing on the top of the slope is more obvious with the increase of the load on the top of the slope. The interaction between the soil in the middle and lower part of the slope and the soil nail is stronger as it approaches the slope.