采坑型滑坡涌浪参数计算——以贵州小坝滑坡为例

采坑型滑坡高速入水激起的涌浪能量巨大,涌浪运动的初始速度极快,运动距离长。本文采用美国土木工程学会建议的推算法计算最大初始涌浪值,运动学公式计算涌浪向前的最大运动速度和最大传播距离,并结合泥石流防治规范计算运动过程中的冲击能量。以贵州小坝滑坡为例对涌浪的初始浪高和传播距离以及传播过程中所产生的冲击能量进行计算。得出涌浪的初始浪高为33.8 m,涌浪最大初始水平运动速度为60 m/s,涌浪最大运动距离为180 m,在运动过程中产生的能量对距涌浪发生点160 m内的建筑物均造成破坏。该计算结果可为采坑型滑坡涌浪预测及其风险评价提供参考。

Calculation of surge parameters of mining pit type landslide - a case study of xiaoba landslide in guizhou province

_{: The high-speed entry water energy in the mining pit-type landslide is huge, and the initial velocity of the surge is very fast and the movement distance is long. In this paper, the maximum initial surge value is calculated by the method proposed by the American Society of Civil Engineering, and the maximum motion velocity and the maximum propagation distance of the surge are calculated by the kinematic formula, and the impact energy in the process is calculated according to the debris flow technical standard. Taking the Xiaoba landslide in Guizhou as an example, the initial wave height and propagation distance of the surge and the impact energy generated during the propagation process are calculated. The initial wave height of the surge is 33.8m, the maximum initial velocity of the surge is 60m / s, the maximum motion distance is 180m, and the energy generated during the movement is within 160m from the point where the surge occurs.buildings are damaged.The results can provide a reference for the prediction of surge and its risk assessment.}