【摘要】 通过以微震和百分表位移为主要试验量测手段的地质力学模型试验,对三峡库区千将坪滑坡进行滑坡机制和利用微地震监测预报预警岩质滑坡的可行性研究。试验结果表明,蓄水前的强降雨对滑坡稳定性影响微弱或基本无影响,水库蓄水引起的浮托力作用仅使滑坡产生蠕滑变形,滑带被水浸泡弱化强度降低是滑坡真正的致滑原因。试验记录的微震事件较清晰地反映滑坡变形破裂破坏过程,并揭示滑带破裂贯通总体上具有自滑坡前缘逐步向滑坡中部发展的规律,从试验角度论证利用微地震监测预报预警岩质滑坡的可行性。更多还原

【Abstract】 A geomechanical model experiment on Qianjiangping landslide in the Three Gorges Reservoir area is conducted. Taking microseism and centigrade meters as the main experiment gauging methods,the mechanism of the landslide is studied and the feasibility of landslide is forecast by micro-seismic monitoring. The experimental results show that the strong rainfall before the initial reservoir impoundment period has little influence on the landslide stability;and the uplifting pressure due to the reservoir water will only induce the creeping of landslide,while the shear strength reduction of slippery zone by attenuation of water immersion is the true failure cause of the landslide. The microseismic events achieved from the experiment display the distortion-breakage-destruction process of landslide clearly,revealing the slippery zone destruction process that is from the toe to the middle of landslide;and the feasibility of landslide forecast by microseismic monitoring is verified.更多还原