The Research Of Mechanism Which Earthquake-induced Landslide

Crustal earthquakes are caused by quick release of energy during the vibration, will produce seismic waves during a natural phenomenon, the most serious harm to human geological disasters. Slopes, including the natural slopes and artificial slopes, is invading the earth's surface with the open side surface geological body, is the nature of the surface features of the most common one, while the lower layer of rock and its weak tensile media, to bear tensile stress area prone to tensile damage of rock. The devastating earthquake relatively large slope failure, coupled with the Rolling Stones were also very serious landslides, landslides also caused landslide-dammed lakes and associated hazards, the study of rock slope under seismic dynamic failure process and patterns of practice in engineering has a very important significance.The finite element method is currently the most widely used research tools, but the traditional finite element method, is built based on the assumption of continuity can not be simulated rocks formed after the tensile rupture of non-continuous structure, and can not directly deal with the problem of rock failure phenomena of Latin America . Based on rock tensile failure theory, the application can simulate tensile rupture of the finite element software for different intensity earthquakes on steep slope under the action of tensile tensile rupture of the regional and temporal phenomenon of numerical simulation. The number of different weak layers with different slope angle slope simulated specimen, loading different directions and intensity of seismic waves, conducted a total of 20 times the value of simulation. Respectively from the same model of earthquakes of various magnitudes Microwave and load; the same as the same slope angle seismic waves in different weak layers loading; the same slope angle seismic waves in different layers of different load three aspects of a weak comparison. The results show that tensile stress zones in the earthquake process, constantly changing, the same angle of slope of the weak layer of the more popular drawing area larger, and the larger the value of the earthquake acceleration, the higher the level of tensile stress, the greater the tension range. Tensile damage caused by the earthquake played a major role in the x direction of seismic wave, y the direction of seismic waves on the slope tensile damage was less affected. Seismic rock produced under additional stress and adjustment process will continue with the earthquake; situ rock stress and additional stress superimposed stress field formed by the total conduct of earthquake occurrence with the corresponding changes. Inclined slope that may arise within a certain tensile stress. Tensile stress region in the process of changing the earthquake and the earthquake acceleration values of the larger the higher the level of tensile stress and eventually produce the initial tensile crack; as the tension increases the scope of the crack extends from the slope to the slope , resulting in tensile damage of rock slope.