Research On The Mechanics Of Landslide And Risk Evaluation

With the rapid development of the society and the enhancement of people's practice ability,the loss of people and properties from landslide is more and more serious and the scale of the hazard is bigger and bigger. The bypass methods of landslide are based on the traditional soil mechanics- people usually concern the stable analysis before it's sliding and rarely consider the sliding process. But the failure of the landslide is been recognized as a dynamic process, the distance and velocity are relative to the scale and degree of the hazard. The qualitative research ways of distance and velocity can not satisfy people's need. So we must give more attention to sliding mechanics to make them quantities, also it is useful to landslide hazard evaluation and treatment. Based on the dynamic process the article analyzes the landslide mechanics combining a practical project.1. Analyzed the formation mechanism, the reason of high speed, the influence factors of intensity, the characters of hazard, the models of the dynamic mechanism, the Evolution Process and the transformation of landslide;2. On the basis of the analysis of geological background and engineering conditions of Yankou landslide,the UDEC is used to simulate the sliding process. The forming cause, sliding time and remains and depositional landforms of landslide are been validated. At the some time, the systemic analyzed and researched is used to the process: it represent that the evolution process of landslide could be recognized into five periods: beginning period, accelerating period, quick-moving period, braking period and tamping period;3. The different distance and velocity point of the landslide are traced to open up the sliding mechanics, also it is useful to the research of Dynamic Mechanism;4. The software of UDEC is used to simulate the different situations. Through the simulation we can get the reason of the landslide disaster. It is useful to us for taking reasonable steps to repair it. The method of repair in the typical landslide is very useful to design and construction;5. The AHP which is based on the comprehensive analysis of different factors is used to analyzed the hazard. The preliminary Method also is used to the Danger Assessment and the Risk Assessment. And the quantitative method and the relation of different hazard affected objects are considered to gain the expressions of risk assessment. It also perfects the method of the Risk Assessment.