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通过室内土坡模型试验,研究了在荷载作用下黏性土坡竖向位移随深度的变化规律、土坡大主应变与最大剪应变分布、土坡的蠕变特性及裂缝作用机制。结果表明,随着荷载的逐渐增大,土坡微结构蠕变不断增加,土体的蠕变过程实质上是土体损伤过程,是土坡微结构能量耗散的过程。土坡的蠕变和损伤积累随着加荷时间延续而增大,损伤各向异性更加明显。坡顶和斜坡面处的损伤程度较大,在坡顶和斜坡面出现裂缝,坡顶的竖向位移大于侧向位移,相反坡底处侧向位移大于竖向位移。
Through indoor soil slope model test, the variation law of vertical displacement of clay soil slope with depth under load is analyzed, and the distribution of main and shear strain, the creep characteristics of soil slope and the mechanism of fracture are researched. The results show that with the increase of load, the creep of soil micro-structure increases. The soil creep process is essentially the soil damage process, which is the energy dissipation process of soil micro-structure. The creep and damage accumulation of soil slopes increase with the increase of loading time, and the damage anisotropy is more obvious. At the top of the slope and on the slope, the damage was more serious. There were cracks on the top and the slope. The vertical displacement at the top of the slope was larger than the lateral displacement. The lateral displacement at the bottom of the opposite slope was greater than the vertical displacement.