【摘要】 甘肃省白龙江流域某大型顺层岩质滑坡经"滑移-拉裂-剪断"而形成,天然状态下基本稳定。在经历"5·12"汶川特大地震发生后,此滑坡有明显的局部复活迹象,可见于滑坡后缘出现连续贯通的拉裂缝。以该滑坡在地震响应下的局部复活为例,以滑坡所处的区域地质条件为基础,对滑坡受地震响应导致局部复活的现象、特征,利用Geo Studio软件动力响应Quake模块,对该滑坡局部复活机制进行模拟研究。结果表明:地震响应下滑坡变形破坏受地质条件和地形坡度的影响显著,同一地震波,相对于基岩,滑坡体对地震波具有明显的放大效应。这为合理地解释在"5·12"汶川特大地震作用下该滑坡局部复活原因提供了理论依据。更多还原

【Abstract】 A large landslide of bedding located in Bailong River basin in Gansu Province of China is formed by sliding-cracking-shearing,and under the natural state is basically stable. Earthquakes are the main factors affecting slope stability,after the "5·12"Wenchuan earthquake,the landslide shows clear signs of revival partial,consecutive gaps were found in the back margin. In the paper,considering the revival of the landslide under the seismic response,first the regional geological conditions were analyzed,as well as the phenomenon and feature due to the earthquake response. Finally,the landslide resurrection mechanism is simulated by using built-in dynamic response Quake module of the Geo Studio software. The results show that landslide failure under seismic response is mainly affected by geological conditions and topographic slope; then,landslide on the response of seismic wave have obvious amplification; Compared the bedrock in a steady state,landslide body is more sensitive to the response of seismic wave that under the same seismic wave. It provide theoretical basis for the rational explanation of the causes of the landslide resurrection under the "5·12"Wenchuan earthquake action.更多还原