关键词: 透水管桩, 扰动效应, 地基土固结, 有限元分析, 孔压消散速度

Abstract: A 3D consolidation model of saturated soft clay around permeable single pile is established by using finite element software to analyze the consolidation behaviors of soil foundation of permeable pipe pile in consideration of disturbance effect. The accuracy of the finite element model is verified through model degradation and test measurement. Furthermore, the laws of dissipation of excess pore water pressure with different geometric parameters of permeable pile are discussed under disturbance effect. Results manifest the accuracy of the finite element model with the simulated result consistent with model degradation and test measurement. The disturbance intensity coefficient α can significantly affect the dissipation rate of excess pore water pressure at the early stage, resulting in the differences of dissipation rate of excess pore water pressure, which, however, reduces along with the dissipation process. The increase of disturbance region s has no significant effect on the dissipation of excess pore pressure, which is more sensitive to disturbance intensity coefficient α. The laws of the dissipation of excess pore water pressure related to different geometric parameters of permeable pipe pile all imply a significant impact of disturbance on the dissipation speed.

Key words: permeable pipe pile, disturbance effect, consolidation of soil foundation, finite elements analysis, velocity of pore pressure dissipation