Study On The Influence Of Plate Distance Under Horizontal Load On Flexible Concrete Expanded-plata Pile

In recent years,the pile foundation are higher bearing capacity variable section pile foundation which is gradually applied in engineering.Its main characteristics are higher bearing capacity than ordinary pile,lower settlement of pile foundation,relatively simple pile forming technology,strong adaptability in engineering,good social and economic effect,and so on.The "flexible" concrete expansion pile in this paper means that when the diameter of the pile is small,the bending deformation of the pile body accumulates and the horizontal displacement of the pile top is large.Therefore,it is called flexible concrete expansion pile(Flexible Concrete Expanded-plata Pile),referred to as F-CEP pile.It is mainly different from rigid or semi-rigid piles with overall overturning.This paper mainly uses the method of controlling single parameter,taking F-CEP pile-disk spacing as the main parameter,then uses the ANSYS finite element software to carry on the numerical simulation analysis to the F-CEP pile model,obtains the pile top horizontal displacement,direction stress Y pile body,shear stress of pile body XY direction under the action of horizontal force are obtained,and the influence of this variable on the bearing capacity of F-CEP pile in horizontal direction is summarized and analyzed;Based on the simulated data analysis results,this paper designs and carries out the experimental research on the small-scale half-section model pile of undisturbed soil.The load and displacement data are recorded in real time during the test,and the variation law of the horizontal displacement of the F-CEP pile top with the change of the horizontal force is observed and analyzed directly,and the failure condition of the surrounding soil of the F-CEP pile is analyzed during the change.This paper further confirms the influence of disk spacing on F-CEP pile under horizontal force and summarizes the influence of disk spacing on F-CEP pile under horizontal force.Based on the theoretical and experimental analysis of this paper,the characteristics of pile failure under horizontal force and the influence of bearing capacity expansion F-CEP disk spacing on its horizontal bearing capacity are determined qualitatively.The calculation model of horizontal ultimate bearing capacity of flexible concrete expansion pile is put forward,and the basic theory of design of horizontal bearing capacity of concrete expansion pile is perfected.