【作者】 宋彦辉；

【Author】 SONG Yan-hui~(1,2) (1.College of Geology Engineering and Geomatics,Chang’an University,Xi’an,Shaanxi 710054,China; 2.Department of Earth Sciences,Simon Fraser University,Burnaby,B.C,Canada,V5A 1S6)

【机构】 长安大学地质工程与测绘学院； Department of Earth Sciences,Simon Fraser University,Burnaby,B.C,Canada,V5A 1S6；

【摘要】 在介绍有限元强度折减法及天池滑坡坝形成、工程特征基础上,首次采用有限元强度折减法对滑坡坝的稳定性进行了全面模拟计算,并说明模拟计算中存在的一些问题。计算工况包括堰塞湖常水位条件、洪水位条件、极限水位条件及相应地震条件下滑坡坝的稳定状态及破坏方式,以及湖水骤降条件下对滑坡坝稳定性的影响。分析结果表明,由于堰塞湖库容相对较小,故不同水位对坝体的影响不大,但总体上仍有随湖水位上升而稳定性下降的趋势。地震对滑坡坝的影响显著,而湖水骤降则对滑坡坝坝体稳定性影响甚微,这一点与一般库岸岸坡明显不同。更多还原

【Abstract】 Based on the description of FEM shear strength reduction method(SSR) and the formation and engineering characteristics of Tianchi landslide dam,the SSR has been firstly used for the stability analysis of landslide darn in details and some probably existing problems in the process of modeling calculation have been pointed out.Assumed calculation conditions include perennial average water level,maximum flood water level, ultimate water level and corresponding seismic condition.The stability status of landslide dam under the conditions of different rapid drawdown is also considered.The research results show that the water level has very little influence on the stability of the landslide dam because of its relative small reservoir storage compared to landslide dam,but generally the stability of landslide dam will still become worse with the rise of the water level. The earthquake is obviously adverse to the stability of landslide dam.When rapid drawdown of the lake water make very slightly influence on the stability of the landslide dam,it is very different from the general bank slope or landslide developed within the reservior area.更多还原