Simulation And Characteristics Analysis Of Typical Subgrade (Bedding Slope) Disaster Mechanism In Southwest Mountainous Area

In the southwest mountainous areas where the terrain,hydrological and geological conditions are complex,the biggest obstacle to highway construction is the possible roadbed disaster,which seriously restricts the progress of highway construction and consumes a lot of money.Subgrade disaster to deal with.In order to solve the problems of stratified rock slope in the highway subgrade,the stratigraphic structure of the rock road cutting slope in the highway subgrade,the collapse and collapse mechanism,the physical model test,the stability analysis,the numerical value Simulation,control measures and other aspects of a lot of research,but the stability analysis is limited to a single slope,deformation mechanism of the study is not enough,numerical simulation is limited to the simulation of slope deformation,or for slope monitoring and forecasting,the lack of this Several aspects of the study to contact,compare and analyze the summary,with the relevant process control research less.After summarizing the present and research results and some shortcomings of the bedding slope,it is considered that the failure of the landslide is not a process,but the whole process of the large deformation is gradually developed into a large deformation.A single numerical simulation can not To explain.In this paper,through a specific engineering example-Yu-sha Taipa landslide,the traditional limit equilibrium theory is used to analyze its stability,its mechanism is analyzed,and then the slope is excavated from the excavation to the loss And then the two backpressure process control in the landslide treatment is carried out.Finally,the numerical simulation of the anti-slide pile construction is carried out.The powerful and efficient numerical simulation of the FLAC 3D is carried out and the key monitoring surface(point)is set.Under the action of the mechanism of instability and deformation,the process of destruction,the role of anti-pressure measures in the control,anti-slide effect of the effect.Through the numerical simulation of the whole process,the sliding mechanism of the stratified landslide can be studied,and the correctness of the qualitative analysis can be verified.Through the numerical simulation of each stage,we can get the visualization of the roadbed in the process of deformation and failure.And ultimately analyze how to effectively control and control such disasters,with theoretical significance and engineering value.This paper is also an integral part of the topic II(catastrophic mechanism process control theory)in the National Science and Technology Support Program Project "Research on the Theory and Dynamic Control Technology of Subgrade Catastrophe Process Control in Southwest Mountainous Road".Mainly to carry out research:(1)(Current model,numerical simulation method,etc.),stability analysis theory(limit equilibrium,unbalanced thrust,numerical value,and so on),the current research status of the bedding slope,including the destabilizing mechanism(mainly slip and collapse)Simulation,etc.).(2)The engineering examples are introduced,and the deformation and failure process are analyzed,and the traditional limit equilibrium method is used to evaluate the stability.(3)Using FLAC 3D to establish the model with the actual compliance and calculate the various stages of the model landslide change,the stage deformation characteristics of the landslide are summarized.Analyze the deformation mechanism,and use the model to simulate the process control.