Abstract:To clarify the similarities and differences between the pile-soil coupling finite element models established by embedded beam element and solid element,this paper takes a high pile wharf on a deep soft soil foundation in North Africa as an example,and compares the model scale,computational efficiency,overall displacement,pile deformation,negative friction,internal force and other key design factors in detail.The results show that the calculation efficiency of embedded beam element pile is 3.5 times that of solid element pile.In terms of the calculation results,both of them can well simulate the overall deformation of the wharf bank slope of soft soil foundation,the negative friction,deformation and vertical force of pile foundation,with the maximum deformation difference is controlled within 5%.However,due to the fact that the embedded beam element simplifies the simulation of the horizontal stress characteristics of pile foundations by setting elastic zones in the soil,it is difficult to consider the “flow effect” of the soil between piles,resulting in the extreme bending moment of the pile foundation reaching 1.5 times that of the solid element pile.In the pile-soil coupling analysis of the wharf bank slope,it is suggested that the embedded beam could be used for rapid evaluation and scheme comparison in the initial design stage,and the solid unit should be used for detail analysis in the implementation stage to improve the economy of the design scheme.
