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“5.12”汶川地震诱发了大量的滑坡和不稳定斜坡体,这些滑坡和不稳定斜坡体的稳定性影响到灾区社会经济发展和灾后重建。地震滑坡的不同稳定性状态孕育了滑坡地形剖面线的演化特征,并且地震滑坡地形剖面线直接地反映了在地震力作用下坡体的演变过程和演化机制。根据实测的汶川地震诱发的滑坡地形剖面线特征,研究了相对稳定滑坡、蠕滑阶段滑坡和不稳定斜坡的地形剖面线的分布特征,以及地震滑坡不同稳定状态下的地形剖面线的多重分形维数演化特征。研究结果表明相对稳定滑坡的多重分形维数演化特征的具有明显的有序性,处于蠕滑状态的滑坡和不稳定斜坡的多重分形维数演化出现明显的特征性拐点。
“5.12 ” Wenchuan earthquake induced a large number of landslides and unstable slopes, the stability of these landslides and unstable slopes affect the socio-economic development and post-disaster reconstruction of disaster-hit areas. The different stability states of earthquake landslide gave birth to the evolution characteristics of the landslide profile line, and the profile of the landslide terrain directly reflects the evolution process and evolution mechanism of the slope body under the action of earthquake force. According to the measured profile of landslide profile triggered by the Wenchuan earthquake, the distribution characteristics of the topography section lines of the relatively stable landslide, the creep landslide and the unstable landslide are studied, as well as the multifractal dimensions of the topographic section lines under different steady states of the landslide Number Evolution. The results show that the evolution characteristics of the multifractal dimension of the relatively stable landslide are obviously ordered. The evolution of the multifractal dimension of the landslide and the unstable slope in the creeping state shows obvious characteristic inflection points.