Field test and numerical analysis on behaviors of low-cap pile foundation supporting bridged abutment subjected to embankment load

Based on field test results,a three-dimensional finite element method was set up to explore the settlement of the pile foundation,the bending moment of the piles,the horizontal movement of pile head,shear force and earth pressure on pile shafts with increasing embankment load behind the abutment wall.The results show that the calculated and measured results agree well;the lateral deformation of pile head and maximum bending moment of pile with the increase of embankment load increases linearly.In 20 m depth,the distribution of shear force along the pile depth is in S shaped pattern,the distribution of the earth pressure along the depth direction is of a parabola.The mechanical model of low-cap pile foundation is equivalent with the statically indeterminate beam of the pile head and pile embedded in a certain depth soil.The conclusions can be helpful and give references for pile design and construction.