Research On Deformation Failure Mechanism And Numerical Simulation Of Retaining Structure System For The Debris Landslide

The debris landslide occur very frequently in our country,especially in the southwest region,not only large quantity,but also wide distribution and great harm.Therefore,the thesis has carried out research on the deformation and failure mechanism,the main influencing factors,the stability evaluation,the selection of the control scheme and so on,which around debris landslide.The main work is as follows:Firstly,based on the results of previous studies,this thesis summarizes and analyzes the characteristics of the debris landslide,including the basic elements,the stability analysis method,the influencing factors,the failure mode,the methods of prevention and control.Secondly,the basic characteristics and formation mechanism of the debris landslide are explored and analyzed.The analysis shows that the landslide is a shallow and small traction type soil landslide.Due to the continuous rainfall for a long period of time,under the influence of groundwater lubrication and osmotic pressure,the slope foot first slips,and traction in the loose bulk consist of the Quaternary collapse slope accumulation of the upper part of the slope along the bedrock surface down.Thirdly,the stability of the debris landslide is analyzed,and the comprehensive prevention and control suggestions are put forward.The analysis shows that this landslide is mainly affected by road reconstruction and the construction of the resident house inside the highway,and the whole is still in the less stable and local peristaltic deformation stage.It is suggested that the landslide prevention and control measures should be adopted to reinforce the landslide,such as anti-slide pile,lattice frame anchor,greening,tamping and filling,cutting and drainage and so on.Fourthly,the stress,strain,displacement and stability of the debris landslide before and after reinforcement is analyzed,and the numerical simulation is done by using the finite element analysis software ABAQUS.Based on the analysis results,the comprehensive treatment scheme is optimized.