Large deformation FE analysis of driven steel pipe piles with soil plugging

Ko, JaeYoun; Jeong, Sangseom; Lee, Joon Kyu

doi:10.1016/j.compgeo.2015.08.005

Cited by 76 publications

(24 citation statements)

References 24 publications

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Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

“…The dimensions of the domains are composed of about 16 times the pile equipment length (P l ) and a height of 16.0 m, to minimize the wave reflecting effect caused by the pile driving. At the sides of the domains, a zero flow velocity normal to those planes is prescribed, and a zero follow velocity in the vertical direction is imposed at the base of the domains [6,13]. The pile domain and soil domain are imposed on the Lagrangian coordinate and Eulerian coordinate, respectively.…”

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

“…For the pile jacking, the velocity of pile jacking is considered as 1 m/sec. For the pile driving, discrete hammer blows are imposed by a time-load curve applied at the reference point of the pile, as shown in Figure 13 [13], and the pile driving energy is considered as 100 kN•m. Figure 14, the pile equipment could not be self-standing, also, in the cases of pile jacking and driving, the pile equipment during pile installation settle and overturn, because of being not enough bearing capacity of pile equipment to resist overturning.…”

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

“…Figure 13. Pile driving load with time for one hammer blow (modified from Ko et al [13]). Figure 14 illustrates the results of simulating pile installation on deep mixing soil.…”

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

“…Recently, a Coupled Eulerian-Lagrangian (CEL) technique has been developed to overcome the limitations of the small deformation analyses. This technique has been applied to various geotechnical fields, such as the penetration of offshore structure [5][6][7][8][9], the landslide and debris flow [10,11], the pile penetration [12][13][14][15][16], and the effect on the nearby soil due to tunneling [17].…”

Section: Introductionmentioning

confidence: 99%

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Application of a Coupled Eulerian-Lagrangian Technique on Constructability Problems of Site on Very Soft Soil

Jeong

Kim

2017

Applied Sciences

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This paper presents the application of the Coupled Eulerian-Lagrangian (CEL) technique on the constructability problems of site on very soft soil. The main objective of this study was to investigate the constructability and application of two ground improvement methods, such as the forced replacement method and the deep mixing method. The comparison between the results of CEL analyses and field investigations was performed to verify the CEL modelling. The behavior of very soft soil and constructability with methods can be appropriately investigated using the CEL technique, which would be useful tools for comprehensive reviews in preliminary design.

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Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

“…Figure 13. Pile driving load with time for one hammer blow (modified from Ko et al [13]). Figure 14 illustrates the results of simulating pile installation on deep mixing soil.…”

Section: Simulation Of Pile Installation On Deep Mixing Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of a Coupled Eulerian-Lagrangian Technique on Constructability Problems of Site on Very Soft Soil

Jeong

Kim

2017

Applied Sciences

Self Cite

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A numerical model of VPS for offshore wind turbine monopiles based on hypoplastic theory

Xiao

2021

Num Anal Meth Geomechanics

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The current research on the penetration of offshore wind turbine monopiles primarily focuses on driving with a vibratory hammer, although there are several smaller studies that focus on the vibrating penetration mechanism. To further the body of research, this paper establishes a numerical model to calculate the vibration penetration speed (VPS) of an offshore wind turbine monopile that considers the soil plugging effect. In this model, a monopile is assumed to be a rigid body. The surrounding soil is divided into a series of circular cylinders of concentric axes. The shear stress at the external soil elements' interfaces and the soil's vertical stress at the monopile toe are calculated using the Gudehus–Bauer hypoplastic constitutive model. The VPS is obtained from the motion equation by compiling it in MATLAB R2012b. Finally, a finite element model is conducted to verify the results, showcasing the rationality of the proposed model. Parameter analyses are also conducted to study the influences of the soil void ratio, soil internal friction angle, vibration frequency, ratio of static load to dynamic load, and monopile diameter on VPS.

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Feasibility of bare fiber Bragg grating sensing technology in the measurement of inner wall axial stress along open‐ended pipe pile in sand

Kou

Jing

Zhou

et al. 2021

Structural Contr & Hlth

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Larger-diameter open-ended pipe piles are widely used as foundation for offshore structures. The lack of high-quality inner wall axial stress measurement results in difficulties in loading analysis of open-ended pipe piles during penetration and service period due to the effect of soil plugging. In this paper, two groups of model tests to assess the feasibility of bare fiber Bragg grating (FBG) sensing technology in monitoring the inner wall axial stress profile of open-ended aluminous pipe piles during penetration and horizontal loading are presented. One open-ended aluminous pipe pile was instrumented with bare FBG sensors and then penetrated into the sand bed with the rate of 20 and 30 mm/min, respectively. Two horizontal static loading tests were also conducted after 24-h penetration. The installation process of bare FBG sensors along open-ended aluminous pipe pile is introduced. The distribution profiles of axial stress and unit shaft resistance on inner wall and outer wall along model pile is discussed in detail. Model test results indicated that the bare FBG sensing technology was feasible to measure the axial stress of inner wall along open-ended pipe piles during penetration and horizontal loading in sand. During horizontal loading, the average values of q so /q si are 0.717 and 0.727, respectively, for model pile with penetration rate of 20 and 30 mm/min. The axial stress difference of inner wall and outer wall along model pile in penetration and horizontal loading is the result of a combination of the inside and outside soil friction as well as of the pipe in-wall shear stiffness. K E Y W O R D S bare FBG sensing technology, inner wall axial stress, open-ended pipe pile, outer wall axial stress, sand bed | INTRODUCTIONLarge-diameter pipe piles (Figure 1) are often used for the foundation in offshore engineering, due to their capacity to transfer loads of superstructures to competent soil layers. Estimation of bearing capacity of these piles requires account for not only the interaction between the pipe pile and the outer soil, but also the interplay with the inner soil. [1][2][3][4][5][6][7] The soil layer inside the pipe pile usually does not conform to the displacement of soil outside the pile in pile penetration,

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Large deformation FE analysis of driven steel pipe piles with soil plugging

Cited by 76 publications

References 24 publications

Application of a Coupled Eulerian-Lagrangian Technique on Constructability Problems of Site on Very Soft Soil

Application of a Coupled Eulerian-Lagrangian Technique on Constructability Problems of Site on Very Soft Soil

A numerical model of VPS for offshore wind turbine monopiles based on hypoplastic theory

Feasibility of bare fiber Bragg grating sensing technology in the measurement of inner wall axial stress along open‐ended pipe pile in sand

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