Piling in fine and medium sand—a case study of ground and pile vibration

Thandavamoorthy, T. S.

doi:10.1016/j.soildyn.2003.12.005

Cited by 33 publications

(6 citation statements)

References 6 publications

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“…8 m. The velocity then decreases and becomes constant, with some slight variations. This trend was also observed in the reported field data (Thandavamoorthy, 2004). If we define the depth of the pile toe at which the PPV at the ground surface occurs as the critical depth of vibration, Figure 15 shows the variations of critical depth of vibration with distance from the pile centreline.…”

Section: Further Investigation Of the Resultssupporting

confidence: 76%

Numerical study of ground vibration due to impact pile driving

Khoubani¹,

Ahmadi²

2014

Proceedings of the Institution of Civil Engineers - Geotechnica

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Ground vibration due to pile driving is a long-lasting concern associated with the foundation construction industry. It is of great importance to estimate the level of vibration prior to the beginning of pile driving, to avoid structural damage, or disturbance of building occupants. In this study, an axisymmetric finite-element model that utilises an adaptive meshing algorithm has been introduced, using the commercial code Abaqus, to simulate full penetration of the pile from the ground surface to the desired depth by applying successive hammer impacts. The model has been verified by comparing the computed particle velocities with those measured in the field. The results indicate that the peak particle velocity at the ground surface does not occur when the pile toe is on the ground surface; as the pile penetrates into the ground, the particle velocity reaches a maximum value at a critical depth of penetration. Some sensitivity analyses have been performed to evaluate the effect of soil, pile and hammer properties on the level of vibrations. The results show that increase in pile diameter, hammer impact force, soil-pile friction and reduction in soil elastic modulus can increase the peak particle velocity.

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Section: Further Investigation Of the Resultssupporting

confidence: 76%

Numerical study of ground vibration due to impact pile driving

Khoubani¹,

Ahmadi²

2014

Proceedings of the Institution of Civil Engineers - Geotechnica

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“…It is of great interest to notice that the vertical components of motion are smaller than the longitudinal components of motion. This is an indication that the wave motion at these sensors is not a classical Rayleigh wave form as traditionally interpreted by researchers who collect surface ground motion data during pile driving operations [10,11].…”

Section: Ground Motionsmentioning

confidence: 83%

“…Placing a geophone closer prevents good coupling of the sensor to the ground because high amplitude ground motions occur in the vicinity of the pile. There are a number of studies [1][2][3][4][5][6][7][8][9][10][11] where surface ground motion measurements have been collected in an attempt to understand how the waves propagate through the ground during pile driving. The work described here represents, for the first time, data collected in close proximity to and in depth from H-piles driven with diesel hammers and the interpretation of that data in terms of energy transfer from pile to ground.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Energy Transfer Mechanism in the Near Field of Impact Driven Piles

Grizi

Athanasopoulos-Zekkos

Woods

2019

10th International Conference on Stress Wave Theory and Testing Methods for Deep Foundations

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Pile installation by applying an impact to the top of a pile appears to be a simple construction process but analysis of that process is complicated as it involves a source of energy, the structural member (pile), and the ground into which the pile is driven. Codes and regulatory standards suggest some basic guidance to analysis but much is still unknown. Pile driving creates vibrations in the surrounding ground that can cause direct damage to nearby structures, cracking in underground utilities or dynamic settlement of loose sands with attendant potential damage. It is customary to monitor surface ground motions starting as close as 1.5 m from the pile and use the surface vibration data to interpret energy propagation. The work described here, however, presents ground motion measurements from impact pile driving not only along the surface but also in the body of the ground at different radial distances and depths. Ground motion data during impact pile driving was obtained by installing motion sensors starting very close to the pile, 0.2 m, and moving away to about 0.8 m and 2 m at the same depth as well as along the ground surface at greater distances. Extensive analysis of the ground motion amplitude and dominant frequencies was performed. Shear wave velocity degradation in the near field of an impact driven pile was

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“…These vibrations may disturb sensitive equipment and people in buildings and cause cracks in walls or facades [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…On the basis of field measurements, several authors [1,[3][4][5] have focused on environmental effects (far field or external effects). Thandavamoorthy [1] has reported results of pile and ground vibrations due to impact pile driving in fine and medium sands. On the basis of time history and the frequency content of the ground velocity, he has shown how ground vibrations can potentially damage structures in the near field.…”

Section: Introductionmentioning

confidence: 99%

A non‐linear coupled finite element–boundary element model for the prediction of vibrations due to vibratory and impact pile driving

Masoumi

François

Degrande

2008

Num Anal Meth Geomechanics

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SUMMARYThis paper presents a non-linear coupled finite element-boundary element approach for the prediction of free field vibrations due to vibratory and impact pile driving. Both the non-linear constitutive behavior of the soil in the vicinity of the pile and the dynamic interaction between the pile and the soil are accounted for.A subdomain approach is used, defining a generalized structure consisting of the pile and a bounded region of soil around the pile, and an unbounded exterior linear soil domain. The soil around the pile may exhibit non-linear constitutive behavior and is modelled with a time-domain finite element method. The dynamic stiffness matrix of the exterior unbounded soil domain is calculated using a boundary element formulation in the frequency domain based on a limited number of modes defined on the interface between the generalized structure and the unbounded soil. The soil-structure interaction forces are evaluated as a convolution of the displacement history and the soil flexibility matrices, which are obtained by an inverse Fourier transformation from the frequency to the time domain. This results in a hybrid frequency-time domain formulation of the non-linear dynamic soil-structure interaction problem, which is solved in the time domain using Newmark's time integration method; the interaction force time history is evaluated using the -scheme in order to obtain stable solutions.The proposed hybrid formulation is validated for linear problems of vibratory and impact pile driving, showing very good agreement with the results obtained with a frequency-domain solution. Linear predictions, however, overestimate the free field peak particle velocities as observed in reported field experiments during vibratory and impact pile driving at comparable levels of the transferred energy. This is mainly due to energy dissipation related to plastic deformations in the soil around the pile. Ground vibrations due to vibratory and impact pile driving are, therefore, also computed with a non-linear model where the soil is modelled as an isotropic elastic, perfectly plastic solid, which yields according to the Drucker-Prager failure criterion. This results in lower predicted free field vibrations with respect to linear predictions, which are also in much better agreement with experimental results recorded during vibratory and impact pile driving.

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Piling in fine and medium sand—a case study of ground and pile vibration

Cited by 33 publications

References 6 publications

Numerical study of ground vibration due to impact pile driving

Numerical study of ground vibration due to impact pile driving

Understanding the Energy Transfer Mechanism in the Near Field of Impact Driven Piles

A non‐linear coupled finite element–boundary element model for the prediction of vibrations due to vibratory and impact pile driving

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