中文摘要：

以虎跳峡滑石板边坡拉裂区失稳可能形成的滑坡为研究对象,依据滑石板边坡稳定性分析结果预测滑坡规模,在分析深切峡谷天然河道滑坡灾害特点的基础上,从滑坡涌浪、堰塞体上游壅水过程、堰塞溃坝水流挟带块石粒径等方面,对滑石板滑坡可能造成的两家人水电站各厂址区域危害进行分析预测,得出的结论可作为两家人工程厂址选择可行性论证的决策依据。提出了基于Delft3D软件水动力学数值模拟的滑坡堰塞体上游水位壅高过程仿真分析方法,以及应用水利水电工程立堵截流抛石粒径计算理论进行堰塞体溃坝水流挟带最大块石粒径估算的方法,为深切峡谷天然河道滑坡灾害防治措施和滑坡后果影响的综合分析提供参考。

英文摘要：

In this paper,by taking the landslide as the research object which may be formed at Huashiban tension crack zone in the Tiger Leaping Gorge of the Jinsha River,according to the results of Huashiban slope stability analysis,the volume of landslide is obtained;on the basis of analyzing the landslide hazard characteristics of natural river in deep-cut gorge,the hazards to the plants site area of Liangjiaren hydropower station may be caused by Huashiban landslide are analyzed,which based on predicting the landslide swell height,simulating the water level rising process and evaluating the maximum size of block stone carried by dam breaking flow,the conclusions which according to above analysis will be treated as the basis for feasibility study on decision making of Liangjiaren powerhouse sites selection.A new method of simulating the water level rising process due to the weir dam blocking up a river is proposed on the basis of hydrodynamic numerical simulation which using Delft3D software,as well as the method of estimating the maximum size of block stone carried by dam breaking flow is given,which based on applying the theory of riprap grain size for closure by vertical blockade in the field of water conservancy and hydropower project;these methods can be used as a reference to hazard prevention measures and disaster effects analysis of the natural river landslide in deep-cut gorge.