Finite Element Analysis of Consolidation Effectiveness of Soil Foundation of Permeable Pipe Pile in Consideration of Disturbance Effect

NIU Shun; XIAO Tao; FENG Jian-xue; RUAN Zhi-huan; MEI Guo-xiong

doi:10.11988/ckyyb.20200865

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Journal of Changjiang River Scientific Research Institute ›› 2021, Vol. 38 ›› Issue (12) : 130-136. DOI: 10.11988/ckyyb.20200865

ROCK-SOIL ENGINEERING

Finite Element Analysis of Consolidation Effectiveness of Soil Foundation of Permeable Pipe Pile in Consideration of Disturbance Effect

NIU Shun^1,2,3, XIAO Tao^1,2,3, FENG Jian-xue^1,2,3,4, RUAN Zhi-huan^1,2,3, MEI Guo-xiong^1,2,3

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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

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NIU Shun, XIAO Tao, FENG Jian-xue, RUAN Zhi-huan, MEI Guo-xiong. Finite Element Analysis of Consolidation Effectiveness of Soil Foundation of Permeable Pipe Pile in Consideration of Disturbance Effect[J]. Journal of Changjiang River Scientific Research Institute. 2021, 38(12): 130-136 https://doi.org/10.11988/ckyyb.20200865

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