Design And Stability Analysis Of Prestressed Anchor Friction Pile Landslide

The pre-stressed anchor cable anti-sliding pile is a new pattern of stake-anchor structure, which has been widely used in many anti-slippery projects of engineering practices in recent years. However, its structural design theory research falls far behind its application, and the study on action mechanism of anti-slide pile with pre-stressed anchor cables is still in the stage of exploration for the complexity of the interaction of pile-anchor system and landslide body. Therefore, it still exists some problems in mechanical calculation model and design method of anti-slide pile with pre-stressed anchor cables. Based on Chenzhou Civil Air Defense office landslide, the summarize and analyze of slope stability analysis and the application research status of this new type of anti-sliding structure using in slope, the mechanism and stability of stabilizing piles with prestressed anchored cables have been studied, which about theory study and numerical simulation. The research works are mainly summarized as follows:The influencing factors of slope stability, the applicability of the slope stability analysis method have been analyzed and discussed. Base on the analysis and research of landslide control techniques, the conventional measures, principles and method for landslide have been introduced. The design methods and theories of the pre-stressed anchor cable anti-sliding pile have been proposed.Based on of Chenzhou Civil Air Defense office landslide and combined with documents consulting method, a series of indoor and outdoor tests and studies have been made, and the types of conditions and environments in suit, the topography and geomorphology condition, the hydrogeology condition and the influence of artificial factors are summarized and analyzed. The characteristics, generation and production mechanism, as well according to the research results of the site investigation, the data collection and the laboratory and field tests and studies are analyzed in detailBased on the situ engineering, the characteristics, generation and production mechanism of the Chenzhou Civil Air Defense office landslide, the slope stability analysis has been implemented by using the limit equilibrium theory. The process and result of conventional design for the pre-stressed anchor cable anti-sliding pile have been given in this disseration by through the analysis and comparison of the treatment scheme.To overcome the problems of the calculation of anti-slide piles with prestressed anchor cables, based on Chenzhou Civil Air Defense office landslide, the finite difference method program (FLAC) and , a two dimensional numerical model for slope stability before the treatment scheme and stabilizing piles with prestressed anchored cables have been established. Slope stability analysis is performed by finite difference modeling, a comparative analysis between the results of shear strength reduction method and limit equilibrium method are analyzed. It is indicated that shear strength reduction finite difference method is appropriate to stability analysis of slope. The internal force of pile including the moment and the shear force distribution, the axial load distribution in pre-stressed anchor cable have also been received by studying the model.The construction sequence, the construction method, the construction technology and the application effect of the anti-slide piles and prestressed anchor cables techniques in the treatment of Chenzhou Civil Air Defense office landslide were introduced, the quality control points and the methods of the anti-slide pile prestressed anchor cable have been proposed, which has the guidance significance for the design and the construction of the similar projects. The post-stage operation shows that the structure has its prominent characteristics compared with the traditional anti-slide structure.