Experimental and Numerical Simulation Study on the Variation Law of Excess Pore Pressure and Stress at Pile-Soil Interface
In order to reveal the temporal and spatial distribution characteristics of excess pore water pressure and vertical effective stress at the pile-soil interface after piling in clay area,based on the fifth teaching and training building project of South Normal University,it is carried out field tests and numerical simulation studies,and compared the numerical calculation results with the experimental results.The results show that the changes of vertical effective stress,pore water pressure and excess pore water pressure are significantly influenced by the sensor position,and the closer the sensor position is to the pile end,the greater the value is.The change characteristics of pore water pressure are influenced by the soil properties.When the pile is in silty clay layer,the pore water pressure at the pile end increases less.The peak value of excess pore water pressure at the pile tip reaches 25kPa,and the excess pore water pressure at the pile top always stays near 0,and the peak value of excess pore water pressure.The numerical simulation results of excess pore water pressure and vertical effective stress at the pile-soil interface are basically consistent with the experimental results,and the variation law with time verifies the effectiveness of the numerical model of pile foundation established in this paper.
excess pore water pressurevertical effective stressfield testnumerical simulation
NETL
NSTL
万方数据
维普
