Stability Analysis Of A High Slope Reinforced By Anti-slide Piles And Lattice Beam

With great rejuvenation of China,the country's infrastructure is in full swing.In order to achieve balanced development,the state has increased the infrastructure construction in western regions such as Tibet province and southwest regions such as Yunnan Province and Guizhou Province,giving birth to a large number of high slope reinforcement projects.As the most typical and economical and effective reinforcement means of high slope,the corresponding theory is far behind the practical application,leaving potential safety hazards for high slope reinforcement engineering.In order to provide reference for the engineering design and safety and stabilit y evaluation of high slope reinforced by anti-slide piles and lattice beams,combined with practical engineering cases,this thesis studies the high slope reinforced by anti-slide piles and lattice beams by consulting literature,experiments and numerical analysis.The main research contents and results are as follows:(1)By consulting literatures,the analysis of existing theories and actual cases in slope reinforcement engineering are studied and summarized,and they provide ideas and methods for the research of high slope reinforced by anti-slide piles and lattice beams.(2)Based on the actual project case,the elements of the analysis models are generalized.In order to be closer to the actual project,the three-dimensional models are built.The influences of the section size of lattice beam,the installation angle and length of bolts,the depth of anti-slide piles in the earth,the installation angle of prestressed anchor cables and the length of the first row of anchor rods on displacement of the slope and stress of the reinforcement structure are studied.Through analysis,the best value ranges conducive to the safety and stability of slope are obtained,and the key points of design and construction are put forward for engineering practice.(3)The undisturbed granite residual soil of a construction site in Yun District,Guangzhou is taken as a sample,the soil water characteristics are measured by TFB-1unsaturated soil stress-strain triaxial instrument,and SWCC of the undisturbed granite residual soil is fitted by Van Genuchten function through software origin2019 b.(4)Based on the rain during the "Dragon boat precipitation" from May 20 to 22,2020,and the typical model of single peak middle rain in Guangzhou rainstorm as the rainfall type,the impacts of rainstorm on the reinforced slope are analyzed.