Study On The Mechanical Characteristics Of Round Anti-slide Piles

The slope of the Changfen Old City Reconstruction Project is located in Pingnan County.The slope has poor geotechnical engineering properties.The traditional artificially excavated rectangular piles are used to treat the slope.Although its anti-slide performance is good,the construction of artificially excavated rectangular piles Disturbance of unstable slopes is affected by external factors,the impact of external factors and the long construction period are prone to cause people's lives and property safety accidents.It is planned to use mechanical anti-slide piles to control the slope.With the development of industrialization of machinery,the diameter of round anti-slide piles is getting larger and larger,and its bending resistance has been significantly improved,which can meet the safety requirements of the project.At the same time,the construction of round anti-slide piles is less affected by the environment during construction and does not need The advantages of locking arm guards and efficient and convenient construction are widely used in geotechnical engineering,foundation pit engineering,emergency rescue and disaster relief projects.The force of circular anti-slide piles is more complicated than that of rectangular anti-slide piles.Experts and scholars have not studied it deeply enough,and the application of side landslides is less.Strengthen the research on the treatment design of round anti-slide piles in side landslides,and comprehensively analyze the stress of round anti-slide piles,so that round anti-slide piles are widely used in the treatment of side landslides.Its main research work and results are as follows:(1)This article takes the slope of the reconstruction project of the Changfen Old City as the research object,uses the Bishop method to calculate the stability of the slope,and uses the Midas/GTS numerical simulation software to numerically calculate the typical ?-?' section of the slope.It is obtained that the stability coefficient of the slope under heavy rainfall conditions is 1.028,which is in an under-stable state and is basically consistent with the deformation of the on-site slope.The slope is planned to be treated with round anti-slide piles;(2)Through the comparative analysis of anti-slide piles with different cross-sectional shapes,it is obtained that the circular anti-slide pile is superior to the rectangular anti-slide pile in terms of construction efficiency,construction safety and economy;(3)The elastic foundation beam method and the elastic fulcrum method are used to derive the calculation formulas of the internal force of the anti-slide piles respectively,and the calculation formulas of the pile body displacement,bending moment and shear force are obtained,and the relationship between the internal forces of the anti-slide piles with different cross-sectional shapes is analyzed.The results show that the size of the pile displacement is very sensitive to the type of sliding pile section,and the magnitude of bending moment and shear force is less sensitive to the type of sliding pile section;(4)Using Midas/GTS to simulate the slope under the action of circular anti-slide piles and rectangular anti-slide piles of equal cross-sectional area,the displacement,bending moment and shear cloud maps of anti-slide piles of different cross-sections are obtained,and the relationship between the internal forces is analyzed,The numerical calculation results are basically consistent with the theoretical calculation results.