| In the process of construction and ser vice of bridge,ocean and other pile foundations,in addition to axial load,pile foundations often bear horizontal actions such as wind load,vehicle braking force,wave erosion,earthquake,etc.However,under the action of lateral load,the pile will ha ve certain horizontal displacement and bending moment,while under the action of axial load,the pile will have certain bending and additional bending moment,so that the stress deformation of single pile under the action of inclined load is quite different from that of single pile under the action of single horizontal load or axial load.Therefore,it is very important to analyze the bearing capacity of piles under the action of inclined load.In this paper,based on the energy method,the inclined load deformation analysis of layered foundation is studiedFirst of all,after summarizing the previous research on the horizontal and inclined pile,this paper uses the energy method to study the deformation characteristics of the horizontal piles in the homogen eous foundation.By establishing the energy equation of the deformation and the energy equation of the soil around the piles respectively,considering the coordination of the deformation and the interaction between the piles and the soil,based on the prin ciple of minimum potential energy,the homogeneous ground is obtained The deformation control differential equation of the pile under horizontal load in the foundation is given.In addition,based on this solution,the relevant parameters of the pile under horizontal load in homogeneous foundation are studied.Secondly,the deformation response of inclined loaded piles is discussed.Considering the linear change of elastic modulus of soil on the side of piles and a certain amount of friction on the side of piles,the energy equation of deformation and the energy equation of soil around piles are established based on the same energy method.Based on the principle of minimum potential energy,the deformation control equation of inclined loaded piles is obtained,and the power series solution is adopted The power series solution is compared with the results of indoor model test,field test and m method recommended in code for design of subgrade and foundation of highway bridge and culvert.Finally,based on the stress deformation analysis of the pile under the action of inclined loads under the single-layer foundation,the layered soil condition is considered in this paper.Finally,the power series solution of the pile deformation analysis under the action of the inclined load of the layered foundation is obtained.On this basis,based on the solution of this paper,the influence parameters are analyzed.The results show that: the length diameter ratio of pile,the elastic modulus ratio of pile-soil,the modulus depth change coefficient of soil around the pile and other factors all have a certain influence on the horizontal displacement and the maximum bending moment of the pile shaft under lateral load. |
