湿润-干燥交替循环条件下黄土边坡内部变形研究

Study on Internal Deformation of Loess Slope under Wet-Dry Cycle

通过自行设计的一套室内模型试验装置开展了湿润-干燥交替环境下的黄土边坡模型试验,主要考虑湿润-干燥次数和幅度对黄土边坡内部土体的影响作用,旨在揭示黄土边坡内部变形发展演化规律。研究结果表明干湿循环的次数和幅度对边坡内部变形量和变形区域深度具有重要影响;距离坡面越近,土体受到外界干湿循环的影响更加明显;边坡较深区域的土体承受上覆荷载作用较大,而受两侧边坡滑动的影响减小。

A set of self-designed indoor model test equipment was used to carry out the model test of loess slope under the wet-dry cycle, focusing on the effects of the number and the range of the wet-dry cycle on the internal soil of loess slope, in order to indicate the development and evolution law of the internal deformation of loess slope. The study results showed that, the number and the range of the wet-dry cycle had great effects on the amount of deformation and the depth of deformation area, which meant the closer the soil was to the slope surface,the more obvious the effects were. The soil in deeper area of the slope bore larger overlaying loads and was less affected by the slope slide on both sides.