Vertical bearing characteristic analysis of cast-in-place pile considering the influence of soil property parameters on pile side
In order to study the influence of the weakening of the elastic modulus of the soil at the pile side on the bearing characteristics of the pile foundation caused by the process of hole-forming and excavation of the cast-in pile,this paper used the finite element software ABAQUS to construct 10 sets of numerical models of the bearing characteristics of the vertically loaded monopile,and combined the pile top load-settlement curves,the pile axial force curves,and the pile end load-settlement curves to analyze the influence of the internal friction angle in the soil surrounding the pile and the elasticity modulus of the soil on the pile side bearing characteristics under the action of vertical load.The results show that when the internal friction angle in the soil surrounding the pile and the elasticity modulus of the soil on the pile side change,the trends of the load-settlement curve at the pile end and the load-settlement curve at the top of the pile are more or less the same.Under the same vertical load,the vertical displacement of the pile top and the vertical displacement of the pile end decrease as the internal friction angle of the soil surrounding the pile and the elasticity modulus of the soil on the pile side increase.When the vertical displacement of the pile top is the same,the vertical load of the pile top increases with the increase of the internal friction angle in the soil surrounding the pile and the elasticity modulus of the soil on the pile side,and the bearing capacity of pile foundation is positively correlated with the internal friction angle in the soil surrounding the pile and the elasticity modulus of the soil on the pile side.The axial force of the pile body decreases roughly linearly first and then stays unchanged.When the vertical load at the top of the pile is the same,the axial force of the pile body at the same pile depth increases with the decrease of the elasticity modulus of the soil on the pile side,while the elasticity modulus of the soil on the pile side has no significant effect on the position of the pile lateral friction force not to be exerted.The internal friction angle in the soil surrounding the pile is insensitive to the fact that the pile axial force does not play a positional role in relation to the pile lateral friction force at the same pile depth.