| Dadukou triangle belts landslide in three gorges reservoir area nearly 50 years has been slow and continuously changing with seasonal, and present in the state of peristaltic. The study of mechanism and prevention measures on dadukou triangle belts landslide has important theoretical value and practical significance.The article calculates the stability of landslide and thrust by using Transfer coefficient method,and validate according to different sliding surface conditions. The article studies the basic characteristics and types of triangle belts landslide, landslide stability, development trend and harm of landslide, and put forward effective measures for meeting the proposed multi-level three gorges landslide prevention.This research leads to such conclusions as below.The landslide has two slip belts, two layer groundwater distribute in the landslide, two layers of water have control function on shallow and deep water slide.The deep slip zone of triangle belts landslide presently is in the state of peristaltic, and will become unstable and instability when the landslide is in the case of immersion or the water level of water level fluctuation.The main internal factors of landslide continuous deformation include the existence of hydrophilic minerals in the sliding body soil , sliding bed dipping below the river water level of Yangtze River ,and the role of groundwater,but the main external factors of inducing landslide deformation are reservoir water immersion, water level fluctuation,continuous rain, large-scale artificial embankment, factory building, etc.The prevention of triangle belts landslide shoule use the method of retaining engineering, supplemented by Cut-off drainage measures according to the formation conditions, topography, stability of landslide, combined with the planning and construction of the plant. The article will provide some reference to similar work experience through the analysis of triangle belt landslide mechanism and prevention measures. |
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