| Natural disasters such as landslides and mudslides occur frequently in my country,and the annual casualties and economic losses are immeasurable.With the continuous development of rock and soil mechanics,related research on slope deformation mechanism and stability has also become a research in the geotechnical field at home and abroad.The readers are focusing on the object.Slope instability failure is a gradual failure process from local continuous expansion to forming a slip surface.In this complex process,the force distribution characteristics and slope stability analysis require us to further explore.The traditional limit equilibrium method has the following problems: First,the ideal elastoplastic model of the slip surface cannot represent the true stress-strain relationship of the rock and soil;second,the strength reduction method used in most methods is not rigorous;Third,the definition of stability coefficient is slightly inadequate.In order to further explore the above problems,the main research contents of this article are as follows:(1)Analyzed the status quo of domestic and foreign related researches,summarized from two aspects of quantitative analysis and qualitative analysis,summarized the development process of slope stability calculation methods,pointed out the shortcomings of various methods,and introduced the side Research on slope failure form and deformation mechanism.(2)The deformation and failure forms of traditional highway slopes are summarized according to different classifications,and the influencing factors that may cause slope deformation and failure are listed;the limit equilibrium method,limit analysis method and numerical value used in the traditional slope stability analysis The analysis method analyzes the advantages and disadvantages;summarizes the common slope treatment measures in the project,and systematically summarizes the whole process method of the slope from the discrimination-the stability analysis-to take the prevention and control measures.(3)In order to describe the progressive failure process of the slope,this article starts from the formation mechanism and state division of the mechanical failure of the slope.The stress distribution characteristics of various modes in the progressive failure process of the slope and the traction slope are analyzed;based on the traditional unbalanced thrust method,the idea of point movement in the critical state is considered,and the stability evaluation of the point and surface is combined.Index,complete judgment and analysis of the progressive failure mechanism and stability of the slope.(4)A new stress theory solution is introduced for highway slope,which can solve the stress and strain field distribution of slope body.At the same time,on the basis of the stress distribution at different critical state points,a new multi parameter evaluation method is proposed for the stability calculation of slope,so as to better express the change of stress state during the gradual failure of slope.(5)Taking the huangyantang highway slope in Hongtu township of Enshi City as an example,according to the traditional slice method and the new theoretical solution,the distribution force and stability state of the slope are calculated.It is proved that the stress distribution of the slope changes with the change of the slope shape and boundary conditions.According to the obtained stress-strain distribution,the necessary prevention measures can be determined,which can further provide the design basis for slope prevention. |
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