Dynamic Characteristic And Stability Prediction For The Typical Landslide From Dongrangkou To Taijitou In Badong County Of Hubei Province

In this study,based on the selection of the representative landslides from dongrangkou to taijitou:Zaozishuping landslide,Sujiapo landslide and Zimeiqiaobei landslide as the research objects.According to the monitoring data to analyse dynamic characteristic of Zaozishuping landslide,SEEP/W module of Geo-Studio is used to simulate flow field of the three landslide under rain and reservoir water level fluctuations,Morgenstern-Price method and imbalance thrust force method are used to calculate the stability coefficient under different conditions.FLAC3 D is adopted to simulate characteristic of deformation and failure of Zaozishuping landslide.The results are as follow:1)Results of field survey,monitoring data and stability prediction show that:Zaozishuping landslide is stable wholly under reservoir water level fluctuations now.2)As the water level slowly drop,the stability coefficient of Zaozishuping landslide,Sujiapo landslide and Zimeiqiaobei landslide drop off early on,in the middle to late stability change depends on dynamic water pressure and uplift pressure.3)As the water level quickly drop,the stability coefficient of Zaozishuping landslide,Sujiapo landslide and Zimeiqiaobei landslide decrease,the greater the reservoir water level rate of decline,the faster the reduce rate of landslide stability coefficient,stability coefficient reaches the lower minimum value.4)As the water level rise,the the stability coefficient of Zaozishuping landslide,Sujiapo landslide and Zimeiqiaobei landslide increase,the greater the reservoir water level rate of increase,the faster the increase rate of landslide stability coefficient,stability coefficient reaches the higher maximum value.5)Under heavy rain working conditions,the stability coefficient of landslide decrease first and then increase over time,at last reach the maximum value at the end of the calculation.6)Deformation and failure prediction shows that: As the stability coefficient of the Zaozishuping landslide reduce,the displacement develop and gradually increase from frontal part to trailing edge.and the maximal displacement happened at the opening place of frontal part.The plastic zone develop from frontal part to trailing edge.The larger shear strain increment happened at sliding zone of frontal area and the maximum shear strain increment appeared in front of sliding zone.7)Deformation and failure prediction shows that : the frontal area of Zaozishuping landslide near the Yangtze River will be the place where most easily destroyed in.