康定县二道桥滑坡风险评价

单体滑坡的风险评价是国内外研究的热点。详细描述了二道桥滑坡的地形地貌特征和变形特征;采用了钻探手段和高密度电法物探手段查明了滑坡的物质组成和结构特征;使用Geoslope软件定量计算了二道桥滑坡在天然、饱和、地震三种工况下的稳定性系数和失稳概率,确定了危险性级别;结合1∶2 000地形测量成果和实地调查,统计出了受二道桥威胁的承灾体类型及数量,确定了危害程度级别;最后根据危险性和危害性构建风险评估的矩阵,对二道桥滑坡进行风险评价,得出滑坡在天然条件下,风险评估级别为M级,表明处于中等风险。在饱和条件和强震条件下,滑坡的风险评估级别为H级,表明处于高风险。评价结果对于当地的防灾减灾工作具有一定的参考价值。

The risk evaluation of ErDaoQiao landslide in Kangding

The evaluation of monomer landslide risk is a hot spot of research at home and abroad. This paper describes in detail ErDaoQiao landslide topography and deformation features; Adopted the means of drilling and the high-density electrical prospecting method to identify the composition and structure characteristics of the landslide; The stability coefficient and the instability probability of ErDaoQiao landslide in natural, saturation, earthquake three working conditions are calculated by using Geoslope software and the level of risk is determined; Combination of 1:2000 topographic survey results and field survey, the type and quantity of hazard-affected bodies are statistical out under the threat of ErDaoQiao landslide and the damage level is determined; Finally the risk assessment are carried on ErDaoQiao landslide.Under natural conditions, level of risk assessment for landslide is grade M, that the risk is middle risk. Under the condition of saturated and earthquake, level of risk assessment for landslide is grade H, that the risk is high. The evaluation results has a certain reference value for the local disaster prevention and mitigation work.