Experimental study on friction fatigue of vibratory driven piles by in situ model tests

Moriyasu, Shunsuke; Kobayashi, Shun–ichi; Matsumoto, Tatsunori

doi:10.1016/j.sandf.2018.03.010

Cited by 24 publications

(10 citation statements)

References 9 publications

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“…The proposed analytical solution is new and, unlike the existing solutions, explicitly takes into account the manifestation of the viscoplastic properties of sandy soil under the action of vibration in an explicit form. The majority of studies involve numerical calculations, and the published analytical solutions contain some simplifications with the introduction of non-standard deformation characteristics into the calculation [7,31,34]; however, the novelty of the proposed solution lies in the introduction of the calculation of ordinary deformation characteristics: sand develops viscosity due to vibration under the action of the dynamic component of loading, and a pile is driven into the viscous sand base due to the static component of vertical loading.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of various parameters of a vibrating pile hammer on the pile driving efficiency are studied by Verbeek G., Dorp R. et al [30]. The article by Moriyasu S., Kobayashi S., and Matsumoto T. [31] presents the results of field studies of vibratory pile driving for different loading parameters (variable frequency, amplitude of dynamic loading, and amplitude of vibration). An experimental laboratory study on vibratory pile driving in sandy soil at different loading parameters and soil properties is described in the publication by Machaček J., Staubach P. et al [32].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Analysis of the Vibratory Pile Driving Rate

Ter-Martirosyan

Shebunyaev

Sidorov

2023

Axioms

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Vibratory piling technology does not require analytical tools to predict displacement rates and arising forces. The authors consider the problem of vibratory driving of a pile into a homogeneous unsaturated sandy massif under the action of static and dynamic loads. The purpose of this study is to develop a new analytical solution to the problem of the vibratory pile driving rate in a homogeneous sand base taking vibration creep into account. The solution is provided for the quasi-dynamic problem statement (inertial terms in equations of motion are neglected): the sand medium develops viscous properties due to vibration under the action of the dynamic component of the load, and a pile is driven into the viscous sand base due to the static component of the vertical load. The obtained mathematical model converges with the results of laboratory flume and field experiments performed by other researchers earlier, where the pile vibratory embedding rate increased along with an increase in static loading, the amplitude of dynamic load, and vibration frequency. It can be used to predict the pile or sheet pile driving rate into the unsaturated sand base under the action of vibration, and also to evaluate the necessary parameters of pile driving to obtain the required value of the pile embedding rate.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematical Analysis of the Vibratory Pile Driving Rate

Ter-Martirosyan

Shebunyaev

Sidorov

2023

Axioms

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“…During pile jacking, stress changes in the sandy soil are significant near the pile, but they also extend a significant radial distance. Model tests and field measurements have been conducted during pile installation with pressure cells in the sandy soil mass [3,11].…”

Section: Effect On the Stress And Deformation Statementioning

confidence: 99%

“…Vibro-driving can reduce the force needed for installation decreasing the shaft friction. The pile base resistance could, however, increase during the vibro-driving process [3]. Depending on the soil grain-size characteristics, soil behavior, in situ soil density, pile spacing, and pile diameter, the installation process can result in measurable densification and an increase in lateral stress [4].…”

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Kabeta

2022

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Several field and model tests have been conducted to investigate the impact of pile installation on bearing capacity. However, little is known about how piles behave during installation, how they interact with the surrounding soil, and how this affects sandy soil properties. This review paper investigates the effect of pile driving on surrounding sandy soil as it compacts sandy soil near to the pile. For this purpose, various related literature was studied based on the observation of the pile installation effect on earth pressure or lateral stress, relative density, and pore water pressure in the sandy soil. A change in the deformation and stress state of surrounding sandy soil due to pile driving was presented. The installation of fully displacement piles can lead to significant stresses and deformations in the surrounding sandy soil. This is one of the main causes of uncertainty in the design and analysis of pile foundations. According to this study, the sandy soil around the pile is compacted during pile driving, resulting in lateral and upward displacement. This leads to the densification effect of pile driving on loose sandy soil. Sandy soil improvement with driven piles depends on pile shape, installation method, and pile driving sequences. This study concludes that in addition to its advantages of transferring superstructure load to deep strata, the increased relative density of loose sand, the change in the horizontal stress, and the influence of compaction on the sandy soil parameters during pile driving should be considered during pile design and analysis.

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“…Nevertheless, the mechanism of 'shaking pressure' and its quantification are still in debate. Except for these explanations, other hypotheses include local liquefaction for saturated sand [39][40][41] , the formation of horizontal soil arches surrounding the vibratory-driven pile, [42][43][44] as well as a decrease in contact force and contact lifetime in a vibrated granular soil. 34 The challenge is how to quantify these changes and correlate them with fluidization induced by vibration mathematically.…”

Section: Introductionmentioning

confidence: 99%

Experimental and modelling investigation of vibration‐induced fluidization in sheared granular soils

Xie

Guo

Stolle

2023

Num Anal Meth Geomechanics

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Vibration-induced fluidization (ViF) is a phenomenon where a granular medium completely loses shear resistance or flows continuously under vibration and thus behaves like a fluid without invoking remarkable excess pore pressure. This paper attempts to investigate ViF through a series of modified triaxial tests and using an extended shear-transformation-zone (STZ) model that correlates macroscopic plastic deformation to the motion of internal mesoscopic weak spots (i.e., STZs) within granular materials. The test results revealed that the ViF may take place when the vibration is applied at either critical or non-critical states. Theoretical analyses using the extended STZ model show that the vibration intensity required to cause fluidization increases linearly with the initial quasi-static shear stress level at which vibration is imposed. The model results are generally consistent with experimental data, indicating that the extended STZ model has a desirable performance in simulating the fluidization of granular soil subjected to quasi-static shearing and vibration simultaneously.

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Experimental study on friction fatigue of vibratory driven piles by in situ model tests

Cited by 24 publications

References 9 publications

Mathematical Analysis of the Vibratory Pile Driving Rate

Mathematical Analysis of the Vibratory Pile Driving Rate

Archives of Civil Engineering

Experimental and modelling investigation of vibration‐induced fluidization in sheared granular soils

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