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为预测和评价灾难性滑坡的致灾机制,基于国内近年来地震和降雨诱发的灾难性滑坡资料,对地震和降雨滑坡的等价摩擦系数H/L、最大水平运动距离L、最大垂直运动距离H与滑坡体积V的关系进行分析。研究灾难性地震和降雨滑坡的远程运动特征以及不同规模滑坡最大水平运动和垂直运动的优势距离。研究结果表明,滑坡的H/L、L、H与V具有幂律关系,其中H/L与V具有负幂律关系,L、H与V具有正幂律关系。同一规模等级的地震和降雨诱发灾难性滑坡的水平和垂直运动距离不同。以H/L=0.42作为滑坡远程运动的标准,地震诱发的灾难性滑坡与滑坡远程运动的关系较小,而降雨诱发灾难性滑坡与滑坡的远程运动的关系较大。根据滑坡运动距离的累积分布表,以80%滑坡的运动距离所分布的范围,建立了滑坡不同规模等级的优势运动距离区间,同规模等级的地震滑坡和降雨滑坡在水平和垂直运动的优势距离区间上存在差异。灾难性滑坡的运程不仅受滑坡体积的控制还与其诱发机制相关,其研究成果可为由地震和降雨诱发的灾难性滑坡的致灾区域和致灾强度的预测和评价提供参考依据。
In order to predict and evaluate the catastrophic mechanism of catastrophic landslide, based on the data of catastrophic landslides caused by earthquakes and rainfalls in recent years in China, the equivalent friction coefficients H / L, maximum horizontal distance L, maximum vertical distance H and landslide volume V of the relationship analysis. The remote motion characteristics of catastrophic earthquakes and rainfall landslides as well as the dominant distances of the maximum horizontal and vertical movements of landslides of different scales are studied. The results show that H / L, L, H and V of landslide have power law relationship, among which H / L and V have negative power law relationship, L, H and V have positive power law relationship. Earthquakes and rainfall-induced catastrophic landslides of the same size scale have different horizontal and vertical movement distances. Taking H / L = 0.42 as the criterion of landslide remote movement, the relationship between the catastrophic landslide induced by earthquake and the long-distance landslide is small, while the catastrophic landslide induced by rainfall has a great relationship with the long-range landslide. According to the cumulative distribution table of landslide movement distance and the range of 80% landslide movement distance, the dominant distance range of landslide with different scale grades is established, and the dominant distance of the landslide scale and rainfall landslide with horizontal scale and vertical movement of scale landslide There are differences in the interval. The disastrous landslide is not only controlled by the volume of landslide but also related to the induced mechanism. The results of this research can provide reference for the prediction and assessment of disaster-prone areas and disaster-induced intensity caused by earthquake and rainfall-induced catastrophic landslides.