Study On The Seismic Behavior Of High Slope Through Shaking Table Test In Southwest Yunnan

Thesis is supported by the subject that seismic evaluation and reinforcement technology of Expressway slope in Southwest Yunnan. It combined with high slope research and considered typical slope as the prototype work sites in survey test section. The shaking model table test is completed by taking into account the slope structural features of slope shape and weak intercalation. The thesis introduces a complete theory test methods that similar relational design, similar material selection, model and model-making method box, the load test program selection in the shaking model table test. Paper research on many aspects of the model slope such as characteristics of deformation and failure, instability mechanism, dynamic response rules of slope and analysis of Influencing factors, through observing the phenomenon of macroscopic experiments and analysising experimental data of sensor monitoring. Suggestions and guidance are provided for natural disasters such as the slope of geological disasters landslides and avalanches caused by the devastating earthquake. Thesis come to the following conclusions:(1) Geological conditions have a great impact on the destruction of slope deformation. Shoulder slope collapse and variable slope-based online department overall slip appear mainly in Concave slope. Variable slope line of slope collapse appear mainly in Convex slope. Location of the most prone to collapse slippage failure in slope is the dissection of soft pelitization. Slope failure process can be divided into several procedures: Concave slope crest pull cracks, fractures and extended further, through the formation of cracks in the slip plane, sloping shoulder slide slope instability failure; Convex slope variable slope line of pull cracks, fractures and dislocation to further expand and extend the model collapses cut line of variable slope between two hierarchical interface; model is completely unstable failure.(2) Slope type impact slope dynamic response acceleration impact, but not significantly, concave slope is less stable than the convex slope. PGA amplification factor of concave slope measuring point is slightly larger than the corresponding measuring point of convex slope. PGA amplification factor of slope surface each measuring point is always greater than the inner slope. PGA amplification factor of slope measuring point presents an broken line increasing tendency. Vibration intensity has little effect on distribution law of slope dynamic response along the elevation direction, but has more obvious effect on acceleration amplification effect of slope. The higher frequency the more dynamic amplification effect of slope is obvious when frequency increases in a certain range. It is closely related to the natural frequency of slope.