Centrifugal Model Test Of Pile Resistance Behaviors Under Combined Loads

Through centrifugal model test,studing resistance behaviors of pile under horizontal loading,vertical loading and combined loading.and using FLAC3D to study several kinds of loadingcondition in centrifugal model Test. Compare with centrifugal model test, The results show that:(1) when the pile under the horizontal and moment combined loading,with the change ofloading point,resistanve behaviors(displacement, deflection,moment and so on)of pileis different, the existence of moment load have an impact on horizontal resistanvebehaviors of pile, the failure envelope curve of pile foundation under horizontal loadingand moment loading is ellipse approximately, and the elliptic center is in coordinatesorigin；(2) when the pile under press loading,with the incresment of press loads, pile axial forcedecrease rate is more and more bigger with the increasement of pile foundation burieddepth, with the increasement of press load，the influenction of skin friction of pile ismove to the bottom of soil；(3) when the pile under vertical ang horizontal combined loading,with the change of verticalloads,the resistanve behaviors of pile is different with horizontal loading, The existenceof the vertical load have an impact on horizontal resistanve behaviors(displacement,deflection,moment and so on) of pile, the failure envelope curve of pile foundation isellipse approximately,and the elliptic center is not in coordinates origin, Pile foundationbearing capacity yield envelope provide the basis for inspecting pile foundation whethersafe or not,which under combined loading.