小浪底东苗家滑坡体原始状态稳定性分析

Stability Analysis of Xiaolangdi Dongmiaojia Landslide in Original State

针对东苗家滑坡体的地质条件,根据其滑坡体变形特征及多种复杂变形组合破坏形式,选用Sarma法对东苗家滑坡体在原始状态的稳定性进行分析和评价。结果表明:东苗家滑坡体在自然状态下基本处于稳定状态;在Ⅶ度地震烈度条件下,该滑坡体将会失稳;地下水位的变化对滑坡体稳定性具有一定影响,但不起主要作用。

Aiming at the geological conditions of Dongmiaojia landslide, according to its landslide deform- ation characteristics, as well as a variety of complex deformation and combination in the form of damage, Sarma method is chosen to analyze and evaluate the stability of Dongmiaojia landslide under original state. Results show that Dongmiaojia landslide in the natural state is basically in a steady state. Accordance with the provision of Seismic Design of Buildings,landslide district has a Ⅶ degrees fortification intensity and the landslide will be instability at the time of Ⅶ degrees seismic. It proves that the impact of seismic activity on landslide stability is significantly. Changes in groundwater level has a certain influence on the stability of landslide, but can not af- ford a major role. Conclusions has reference significance on the long-term stability evaluation of Dongmiaojia landslide.