Analyze The Seepage Force Effect On Slope Stability Based On The Law Of Conservation Of Energy

The research of slope stability has already been researched nearly hundred years. The research and literature of slope stability have thousands of butter every year, but the slope landslide disaster and the losses it lead to are growing, so we have to find more ideas and methods to reserch the stability of slope, and it also force people to reveal the mechanism of landslide. Then we can explore the new theory, new method of the slope instability analysis on this basis.For slope, there are many factors affecting the stability of its, such as rainfall, earthquake and human activities, etc. In these factors, the rainfall induced slope instability is more, the most outstanding."Ten landslide nine because of water" although not comprehensive, it also suggests that water is a very significant influence on the stability of the landslide. So it is very important to study the effect of rainfall on slope stability, also is very necessary. Now, we considering from the aspects of rainfall cause the energy change of soil, by analyzing the energy produced in the process of rainfall infiltration into the soil, then convert it to the variation of seepage force in the soil, finally derive calculation formula of penetration, and connecting with the limit equilibrium method of Bishop method and horizontal slice of limited equilibrium method to analysis and calculation of slope stability. Then use the penetration has deduced to analyze the slope stability under the action of earthquake and rainfall coupling. The specific research work are as follows:1. Using the law of conservation of energy to deduce the penetration calculation formula of seepage force in the soil caused by rainfall, and connecting with the limit equilibrium method to considered the effect of the slope stability safety coefficient calculation formula under the condition of seepage force caused by rainfall. Then considering the sensitive of the slope stability safety coefficient effected by the slope stability safety factor includes slope gradient, rainfall, etc.2. Applying the seepage force calculated by the law of conservation of energy into the horizontal slice of limited equilibrium method, then calculated the slope stability safetv coefficient under that condition. Comparative and analysis the results of slope stability safety coefficient between the horizontal slice of limited equilibrium method and the vertical slice of limited equilibrium method.3. Using seep module in Geo-Studio software to analyze the rainfall infiltration in the same example, get the changes in value of water pressure line in soil, then apply them to the Slope module to calculate the slope stability safety coefficient under the various condition. Compare the results of the numerical solution and the analytical solution, analysis the difference, and test the rationality of the method to calculate the results in this paper.4. Applying the seepage force calculated by the law of conservation of energy and seismic force both to the Bishop method, to deduced the slope stability safety coefficient calculation formula under the action of earthquake and rainfall coupling, and then to analyze the slope stability.