Torsional complex impedance of pipe pile considering pile installation and soil plug effect

2020 ◽  
Vol 131 ◽  
pp. 106010 ◽  
Author(s):  
Yunpeng Zhang ◽  
Xiaoyan Yang ◽  
Wenbing Wu ◽  
M. Hesham El Naggar ◽  
Guosheng Jiang ◽  
...  
Keyword(s):  
Complex Impedance ◽  
Soil Plug ◽  
Pipe Pile ◽  
Pile Installation

Numerical Simulations Concerning the Tendency of Soil Plugging in Open-Ended Steel-Piles

2009 ◽  
Author(s):  
Sascha Henke ◽  
Ju¨rgen Grabe
Keyword(s):  
Finite Element Method ◽  
Granular Soil ◽  
Soil Density ◽  
Soil Plug ◽  
Pile Installation ◽  
Pile Diameter ◽  
Rigid Pile ◽  
Steel Piles ◽  
Plug Formation

The development of soil plug inside open-ended steel-piles is investigated using Finite-Element method. The penetration of a rigid pile with various diameter into granular soil is simulated numerically to better understand the mechanisms which occur during pile installation inside the open-ended piles. The numerical results are analyzed for a better understanding of the influence of the installation method on soil plugging. The received results are compared to experimental results out of literature. Concluding, a parametric study is fulfilled to examine the role of soil density and pile diameter concerning the tendency of plug formation inside a jacked pile.

Influence of soil plug effect on the torsional dynamic response of a pipe pile

2017 ◽  
Vol 410 ◽  
pp. 231-248 ◽  
Author(s):  
Hao Liu ◽  
Guosheng Jiang ◽  
M. Hesham El Naggar ◽  
Wenbing Wu ◽  
Guoxiong Mei ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Soil Plug ◽  
Pipe Pile

Effect of Pile Installation Method on Pipe Pile Behavior in Sands

2004 ◽  
Vol 27 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Kyuho Paik ◽  
Rodrigo Salgado
Keyword(s):  
Pipe Pile ◽  
Pile Installation

New method to calculate apparent phase velocity of open-ended pipe pile

2020 ◽  
Vol 57 (1) ◽  
pp. 127-138 ◽  
Author(s):  
Wenbing Wu ◽  
Hao Liu ◽  
Xiaoyan Yang ◽  
Guosheng Jiang ◽  
M. Hesham El Naggar ◽  
...  
Keyword(s):  
Phase Velocity ◽  
Unit Length ◽  
Longitudinal Wave Velocity ◽  
Additional Mass ◽  
Mass Model ◽  
Soil Plug ◽  
Pipe Pile ◽  
Winkler Model ◽  
Concrete Pipe ◽  
Attenuation Mechanism

The apparent phase velocity of open-ended pipe piles after installation is difficult to predict owing to the soil-plug effect. This paper derives an analytical solution to calculate the apparent phase velocity of a pipe pile segment with soil-plug filling inside (APVPSP) based on the additional mass model. The rationality and accuracy of the developed solution are confirmed through comparison with the solution derived using the soil-plug Winkler model and experimental results. A parameter combination of the additional mass model that can be applied to concrete pipe piles used most commonly is recommended. The attenuation mechanism of the soil plug on the APVPSP is clarified. The findings from this study demonstrate that the APVPSP decreases with the mass per unit length of the pile, but has nothing to do with the material longitudinal wave velocity of the pipe pile. The APVPSP decreases significantly as the impulse width increases; however, for pipe piles without soil-plug filling inside, the impulse width has negligible influence on the apparent phase velocity.

scholarly journals Improved soil plug height calculation formula

2021 ◽  
pp. 121
Author(s):  
Keyword(s):  
Theoretical Calculation ◽  
Balance Equation ◽  
Vertical Direction ◽  
Calculation Formula ◽  
Force Analysis ◽  
Soil Plug ◽  
Pipe Pile ◽  
Calculation Results ◽  
Open Pipe ◽  
Multiple Units

This paper analyzes the soil plugging effect of the open pipe pile during the pile sinking process. The soil in the pipe pile is regarded as a continuous and uninterrupted multiple units, and the force analysis is carried out in the vertical direction, and the vertical balance equation of the soil in the pile is obtained. By establishing an equation, the expression of the plug height of the pipe pile during the pile sinking process is obtained. Comparing the theoretical calculation results with the actual project, it is concluded that the theoretical calculation results can reflect the overall change in the height of the soil plug. Therefore, the pile plug height obtained by calculation has certain guiding significance for the project.

Mechanisms of soil plug formation of open-ended jacked pipe pile in clay

2020 ◽  
Vol 118 ◽  
pp. 103334 ◽  
Author(s):  
Teng Wang ◽  
Yu Zhang ◽  
Xingxian Bao ◽  
Xiaoni Wu
Keyword(s):  
Soil Plug ◽  
Pipe Pile ◽  
Plug Formation

scholarly journals New interaction model for vertical dynamic response of pipe piles considering soil plug effect

2017 ◽  
Vol 54 (7) ◽  
pp. 987-1001 ◽  
Author(s):  
Wenbing Wu ◽  
M. Hesham El Naggar ◽  
Maged Abdlrahem ◽  
Guoxiong Mei ◽  
Kuihua Wang
Keyword(s):  
Analytical Solution ◽  
Dynamic Response ◽  
Dynamic Testing ◽  
Interaction Model ◽  
Function Technique ◽  
Actual Behavior ◽  
Additional Mass ◽  
Mass Model ◽  
Soil Plug ◽  
Pipe Pile

A soil–pile interaction model is developed to better represent the actual behavior of pipe piles undergoing dynamic testing. To correctly investigate the dynamic interaction mechanism of the pipe piles, the developed model introduces an additional mass to account for the soil plug. The governing equations of motion for the soil–pile system subjected to small deformations and strains are established considering plane strain conditions for the soil and one-dimensional wave propagation in the pile. The analytical solution of the vertical dynamic response of the pipe pile in the frequency domain is then obtained by employing a Laplace transform and transfer function technique. The corresponding quasi-analytical solution in the time domain for the pipe pile subjected to a vertical semi-sinusoidal exciting force is subsequently derived by means of a Fourier transform. A parameter sensitivity analysis of the additional mass model is carried out to determine the approximate range of the parameter values. Utilizing the developed solution, a parametric study is performed to illustrate the influence of the properties of the soil–pile system on the vertical dynamic response of the pipe pile. Finally, the validity of the additional mass model is validated by conducting a set of model tests, based on which the concept of “apparent wave velocity of pipe pile” (AWVPP) is also proposed.

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