Research On The Design Of Prestress Anchor Cable Anti-sliding Pile And Reinforcement Effect

Landslide is a natural phenomenon,which can cause huge economic losses,and even destructive damages.These massive losses of life and property led by landslide around the world in recent years have warned us that it is very necessary to strengthen the research of the structural response of landslides.Therefore,how to prevent the occurrence of landslides is one of the most challenging tasks throughout the world.To resist the landslides,we need to have a better understanding of the landslides.This article mainly focuses on the method of the design and calculation of the prestress anchor cable anti-slide pile as a frequently-used supporting structure.Based on the previous study on this field,this paper still focuses on the calculation of the interior tension of non-anchor cable and anchor cable anti-slide pile and the deduce of the frequently-used design method and process in our country of the prestress anchor cable anti-sliding pile with the new supporting structure based on its design principles.And this paper summarized the background of the topic,the purpose of this research and the achievements in the field of theoretical research,numeral simulations and experimental investigation and so on that had been reached by those experts and scholars around the world.At the same time,this paper also stated the some shortcomings of the current researches.At present,the theoretical research at home and abroad of the static response of this supporting structure lagged behind its practical application.Hence,the development of theoretical research and the application of the prestress anchor cable anti-slide pile were analyzed and introduced in this paper.First of all,this paper introduced the basic presumptions of the research,and detailedly explained the calculating method of the landslide thrust in different sliding surfaces,the selection principle in different geological conditions and the distribution forms of landslide force.Then this paper deduced the compatibility equations of deformation of prestress anchor cable anti-slide pile that can calculate the reasonable prestress value of each anchor cable,based on which can solve the interior tension of each units.The result calculated by this method was more accurate due to the consideration of inter-influence of anchor cable and soil.Finally,the different algorithms and mechanisms of the anchor cable and non-anchor cable anti-slide pile were summarized and some my own suggestions of construction requirement of anchor cable anti-slide pile were given in this paper.This paper introduced FLAC3D software and summaried the advantages and disadvantages of it when it was used in the engineering numerical simulation.Based on the research of large-scale landslide control of the actual cases of TJ5 section,expressways from Nanchuan,Chongqing to Daozhen,Guizhou,and this paper summarized the narural and man-made factors and proposed some engineering prevention measures to solve this problem.In the end,the buckling safty factors of the before and after reinforcement of the slope were calculated and the distribution diagrams of the axial force,bending moment and shear force of the anti-slide pile that was reinforced with non-anchor cable anti-slide pile and the prestress anchor cable anti-slide pile in this large-scale landslide were simulated by using the finite element software,FLAC3D to simulate the engineering situlations of the large-scale landslide of he actual cases of TJ5 section,expressways from Nanchuan,Chongqing to Daozhen,Guizhou.Compared the results of these,this paper analyzed the slope response and reinforcement effect of the large-scale landslide under the landslide thrust load and then gave my own conclusions.