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考虑到高速滑坡过程中的速度和变形的不均匀性、变形能的改变以及能量的损耗 ,提出一种可以模拟滑坡从失稳开始滑动到终止全过程的数值模型 ,可用来预测最大滑速和最大滑距及滑体形状的变化 .通过对天水锻压机床厂滑坡的滑速和滑距的验证及坡体形状的计算机模拟 ,证明了该方法的有效性 .结果表明 :滑坡形成高速的根本原因在于剧滑时综合摩阻力的下降 ,滑体后部在滑动过程中的较大重心落差是滑体高速运动的动力来源 ;在滑动的中间阶段 ,滑体经常呈现出整体运动的特征 ,而中前部土体在滑坡后则易处于松弛甚至拉伸的状态
Considering the speed and deformation inhomogeneity, deformation energy and energy loss in high-speed landslide, a numerical model that can simulate the whole process of landslide sliding from instability to termination can be used to predict the maximum slip and Maximum slippage and the change of the shape of the slide body.Through the validation of the slip and slip of the landslide in Tianshui Forging Machine Factory and the computer simulation of the slope shape, the method is proved to be effective. The results show that the root causes of the high speed of landslide formation In the slippery slippery composite frictional resistance decline, the slippery rear in the sliding process of large center of gravity drop is the sliding body of high-speed movement of the source of power; in the middle of the slippery body, the slippery body often shows the characteristics of the overall movement, and in The front soil tends to be relaxed or even stretched after the landslide