Group interaction on vertically loaded piles in saturated poroelastic soil

Liang, Fayun; Song, Zhu; Guo, Wei Dong

doi:10.1016/j.compgeo.2013.10.003

Cited by 33 publications

(11 citation statements)

References 21 publications

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“…The decrease in interaction factor with increasing pile group spacing for a particular L/d ratio is more pronounced for shorter piles (L/d < 20). It is also observed that the interaction factor is smaller for slender piles (L/d > 20) as compared with short piles, consistent with the reported literatures (Guo and Liang et al). This can be attributed to the fact that slender piles have the capabilities to generate more skin resistance as compared with shorter piles and give rise to lesser creep over a period of time.…”

Section: Results and Parametric Studiessupporting

confidence: 91%

“…Interaction factors are compared for three slenderness ratios, ie, L/d = 10, 50, and 100 and pile‐soil relative stiffness of 1000. The proposed interaction factors for creep are consistent with the reported results (Liang et al) and show a difference of less than 10%.…”

Section: Results and Parametric Studiessupporting

confidence: 91%

“…The influence of creep is more significant in square (2 × 2) and rectangular (3 × 2) pile groups as compared with line pile groups (2 × 1 and 3 × 1). Figure shows the comparison of proposed interaction factor from the present viscoelastic model with the reported results by Liang et al for a two‐pile system (2 × 1). Interaction factors are compared for three slenderness ratios, ie, L/d = 10, 50, and 100 and pile‐soil relative stiffness of 1000.…”

Section: Results and Parametric Studiesmentioning

confidence: 62%

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Analysis of creep settlement of pile groups in linear viscoelastic soil

Mishra

Patra

2019

Num Anal Meth Geomechanics

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Summary This paper presents the analysis of creep settlement of pile groups for line pile groups, square pile groups, and rectangular pile groups undergoing creep settlements over a period of time. The soil is treated as a viscoelastic material and is modeled using a three‐parameter viscoelastic model. The damping component (dashpot) takes care of the permanent time‐dependent deformations in three‐parameter viscoelastic model. An approach suggested by Mindlin has been employed to calculate the stress distribution along the pile length in a group. The viscoelastic problem is converted into an elastic problem by the application of Laplace transform. Results in the form of variation of interaction factors for parameters such as pile length to diameter ratio, pile spacing, Poisson's ratio, and modulus ratio have been presented. Comparison has been made between interaction factors for piles groups undergoing immediate settlements and creep settlements. Finally, a typical predictive example has been presented for a 3 × 3 pile group showing creep settlement. The load rearrangement due to creep settlements causes about 5% to 35% increase in base resistance over time. Interaction factors for pile groups (2 × 1, 3 × 1, 2 × 2, and 3 × 2) undergoing creep settlement is about 15% to 55% higher than the interaction factors considering only the immediate settlements for pile group spacing less than or equal to 5d.

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Section: Results and Parametric Studiessupporting

confidence: 91%

Section: Results and Parametric Studiessupporting

confidence: 91%

Section: Results and Parametric Studiesmentioning

confidence: 62%

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Analysis of creep settlement of pile groups in linear viscoelastic soil

Mishra

Patra

2019

Num Anal Meth Geomechanics

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“…In contrast to the extensive research work on the analysis of piles under axial and lateral loads (see for instance [1][2][3][4][5][6][7][8][9][10][11]), the analysis of piles under torsional loading has received less attention in the past. O'Neill [12] established a closed-form elastic solution for the pile head torque-twist relationship of single piles and introduced a discrete element model using torsional springs.…”

Section: Introductionmentioning

confidence: 99%

Analysis of pile groups subjected to torsional loading

Chen

Kong

Zhang

2016

Computers and Geotechnics

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“…However, when the pile tip is supported on the rock, the pile tip resistance should be considered, and the bearing capacity of the pile is mainly controlled by the material strength of the pile mass [42][43][44][45][46]. Australian engineers have proposed a semi-empirical and semi-theoretical root pile design theory.…”

Section: Vertical Load Bearingmentioning

confidence: 99%

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

Ding¹,

Su²,

Lai³

et al. 2017

CEJ

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Over the past couple of decades, root piles as the new tool for addressing a number of tough problems have been gaining a continually increasing interest in tunnel, especially for complex geological conditions. Therefore, in order to promote the development and application of root piles in tunnel engineering, this paper systematically sorts out the research status and development prospect of root piles from the application in foundation underpinning to reinforcement of tunnel foundation. Firstly, the type and development process of root piles are discussed. Secondly, the reinforcement mechanism of the root piles in the tunnel base is refined and combed: the reinforcement mechanism analysis focuses on frictional resistance of soil around pile, soil among piles, and piles. Thirdly, the calculation method of reinforced tunnel foundation is studied from the bearing of vertical load, horizontal load and pile reinforcement design. And through the engineering case, the paper illustrates the reinforcement effect of the root pile in ensuring the stability of the tunnel and the concrete process of the root piles in the tunnel construction. Finally, the problem and development prospect of root piles are discussed, so as to provide new perspectives and fundamental data for the research on tunnel engineering.

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Group interaction on vertically loaded piles in saturated poroelastic soil

Cited by 33 publications

References 21 publications

Analysis of creep settlement of pile groups in linear viscoelastic soil

Analysis of creep settlement of pile groups in linear viscoelastic soil

Analysis of pile groups subjected to torsional loading

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

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