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设计并制作2个含泥化夹层的顺层岩质边坡模型,并完成大型振动台试验。试验结果表明:随着输入地震波时间轴压缩倍数增大,地震波卓越频率增加,边坡坡面水平方向加速度放大效应增强,同时,随着边坡相对高度的增加,压缩比对水平方向加速度放大效应的影响程度增大;当输入地震动幅值小于0.30 g时,坡面加速度放大系数随输入地震动幅值增加而增大,反之,放大系数减小;在水平方向,泥化夹层饱水后坡脚部位加速度放大系数小于饱水前,而坡面中上部加速度放大系数大于饱水前;在垂直方向,泥化夹层饱水后坡面加速度放大系数小于饱水前;泥化夹层饱水前,坡面加速度放大系数大于坡体内部,泥化夹层饱水后,下部坡体内部加速度放大系数大于坡面,中上部坡体内部加速度放大系数小于坡面。分析边坡破坏过程可以发现,含泥化夹层顺层岩质边坡的破坏模式为拉裂–滑移–崩落式。
Two bedding rock slope models with muddy intercalation were designed and fabricated, and a large shaking table test was completed. The experimental results show that with the increase of the time axis compression multiples of input seismic wave, the remarkable frequency of seismic waves increases, and the horizontal acceleration acceleration effect of slope slope increases. At the same time, as the relative slope height increases, When the amplitude of input earthquakes is less than 0.30 g, the amplification factor of slope acceleration increases with the amplitude of input earthquakes, on the contrary, the amplification factor decreases; in the horizontal direction, In the vertical direction, the coefficient of acceleration of slope acceleration in the vertical direction is smaller than that before saturated water; before the muddy interlayer is saturated with water , The amplification factor of slope acceleration is larger than that of the slope. After the muddy interlayer is saturated with water, the amplification factor of internal acceleration of the lower slope is larger than the slope, and the acceleration factor of the middle slope is smaller than the slope. Analyzing the process of slope failure, we can find that the failure mode of bedding rock slope along muddy intercalation is pull-slip-slip-collapse type.