Influence zone around a closed-ended pile during vibratory driving

Ekanayake, Sanka D; Liyanapathirana, D. S.; Leo, Chin Jian

doi:10.1016/j.soildyn.2013.06.005

Cited by 39 publications

(18 citation statements)

References 15 publications

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“…When the sleeve is being driven, the sleeve transfers the periodic vibrating load to the soils around the sleeve (Ekanayake et al 2013 ). The strain in the soils around the sleeve continues to increase, and the cohesion and shear strength gradually decrease.…”

Section: Resultsmentioning

confidence: 99%

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Numerical investigation of soil plugging effect inside sleeve of cast-in-place piles driven by vibratory hammers in clays

2016

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During driving sleeve of cast-in-place piles by vibratory hammers, soils were squeezed into sleeve and then soil plugging was formed. The physic-mechanical properties of the soil plug have direct influence on the load transmission between the sleeve wall and soil plug. Nevertheless, the researches on this issue are insufficient. In this study, finite element and infinite element coupling model was introduced, through the commercial code ABAQUS, to simulate the full penetration process of the sleeve driven from the ground surface to the desired depth by applying vibratory hammers. The research results indicated that the cyclic shearing action decreases both in soil shear strength and in granular cementation force when the sleeve is driven by vibratory hammers, which leads to a partially plugged mode of the soil plug inside the sleeve. Accordingly, the penetration resistance of sleeve driven by vibratory hammers is the smallest compared to those by other installation methods. When driving the sleeve, the annular soil arches forming in the soil plug at sleeve end induce a significant rise in the internal shaft resistance. Moreover, the influence of vibration frequencies, sleeve diameters, and soil layer properties on the soil plug was investigated in detail, and at the same time improved formulas were brought forward to describe the soil plug resistance inside vibratory driven sleeve.

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Section: Resultsmentioning

confidence: 99%

“…The natural frequency extraction analysis of the soil model can be carried out by Abaqus/Standard, and the obtained first natural frequency is 1.28 Hz. The damping coefficient ξ used in this paper is the recommended value of 2 % by Ekanayake et al ( 2013 ). From Eq.…”

Section: Methodsmentioning

confidence: 99%

Numerical investigation of soil plugging effect inside sleeve of cast-in-place piles driven by vibratory hammers in clays

2016

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“…Hence, the seventh eigen frequency was considered for each model, which was 17.825 rad/s. The damping factors, α R and β R , were then calculated considering 5% of critical damping [11], which were 1.426 and 0.001, respectively. A vertical point load of 11.75 kN operating at 40 Hz as a sine wave was applied on the ground 2.5 m away from the centre of the wave barrier.…”

Section: Model Verificationmentioning

confidence: 99%

“…9 illustrates the variation of PPV n along the surface of the soil domain with the operating frequency of the ground vibration source. These results were extracted for different frequencies of the vertical vibratory source with a magnitude of 11.75 kN, varying from 25 to 55 Hz, which is the operational frequency range of commercially available ABI vibratory pile drivers [11]. This changes the Rayleigh wave length of the soil medium from 8.59 to 3.91 m during the parametric study.…”

Section: Eps Geofoam In-filled Wave Barriersmentioning

confidence: 99%

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Attenuation of ground vibrations using in-filled wave barriers

Ekanayake

Liyanapathirana

Leo

2014

Soil Dynamics and Earthquake Engineering

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Numerical Simulation of the Influence of Piling on the Surrounding Soil

Ci,

2024

Lecture Notes in Civil Engineering

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In pile driving construction, the soil around the pile will produce vibration and compaction effects to destroy the safety and stability of the surrounding pipelines and buildings. To study the deformation of surrounding soil during piling, this paper adopts ABAQUS finite element analysis software to drive piles at the penetration rates of 7.5, 5, 2, 1 and 0.2 cm/s, respectively, to study the variation law of soil stress and displacement. The results show that the stress distribution below the pile tip is hemispherical, with a range of 6 times the pile diameter, and there is stress concentration at the pile tip. The soil deformation first produces downward compression deformation, then oblique extrusion, and finally vertical unloading under the action of pile side friction resistance. With the increase of the distance from the pile axis, the vertical displacement of the ground surface on the pile side gradually decreases and tends to be gentle at twice the pile diameter. With the increase in penetration rate, the vertical stress at the pile tip increases to a certain extent, but the change is not obvious. The conclusion above can provide some reference value for practical piling construction.

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Influence zone around a closed-ended pile during vibratory driving

Cited by 39 publications

References 15 publications

Numerical investigation of soil plugging effect inside sleeve of cast-in-place piles driven by vibratory hammers in clays

Numerical investigation of soil plugging effect inside sleeve of cast-in-place piles driven by vibratory hammers in clays

Attenuation of ground vibrations using in-filled wave barriers

Numerical Simulation of the Influence of Piling on the Surrounding Soil

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