Pile Group Settlement Estimation: Suitability of Nonlinear Interaction Factors

McCabe, Bryan A.; Sheil, Brian B.

doi:10.1061/(asce)gm.1943-5622.0000395

Cited by 23 publications

(9 citation statements)

References 32 publications

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“…For real soils, however, the increased level of shear strain in the vicinity of a loaded pile causes a corresponding reduction in the soil modulus. The consideration of soil nonlinearity therefore results in different values of α depending on the applied load level and whether Approach I or Approach II is adopted (McCabe and Sheil 2015).…”

Section: Nonlinear Two-pile Interaction Factorsmentioning

confidence: 99%

Pile groups under axial loading: an appraisal of simplified non-linear prediction models

et al. 2019

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The settlement behaviour of vertically-loaded pile groups has been the subject of an extensive body of research over the past two decades. In particular, this work has identified the overconservatism associated with predictions of pile interaction derived from elastic theory and the corresponding amplification of group settlement relative to single pile values. Researchers have since redoubled efforts to refine settlement predictions for pile groups towards more economical design, largely through more rigorous treatment of soil stiffness nonlinearity. Although foundation design engineers are increasingly employing three-dimensional continuum analyses to quantify pile interaction on a site−specific basis, simplified design approaches remain an integral part of preliminary foundation design. The purpose of this paper is to undertake a critical examination of these methods with a view to increasing their potential for take-up by foundation engineering practitioners. A database of simplified models has been collated for the prediction of nonlinear pile interaction that exists within vertically-loaded pile groups. These models are categorised as either analytical or empirical. The development, limitations, and range of applicability of these models are explored in detail in the context of some published case histories.

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Section: Nonlinear Two-pile Interaction Factorsmentioning

confidence: 99%

Pile groups under axial loading: an appraisal of simplified non-linear prediction models

et al. 2019

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“…In the case of the pile group in elastic continuum, the best known solutions are those proposed by Buterfild and Banerjee [17], Banerjee [27], Poulos [18,28], Mandolini [23,29], McCabe and Sheil [30] and others. Unlike the Winkler method, the calculation of the interaction between the piles in elastic continuum does not require additional work or modifications, since the continuum implicitly assumes the spread of the impact from one pile to all adjacent piles in the group.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution of Arbitrary Loaded Spatial Pile Group

Santrač

Bajic²

2020

Period. Polytech. Civil Eng.

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This paper presents an analytical method for the calculation of the arbitrary loaded spatial pile group fixed or/and hinge jointed into a rigid cap. The method uses the vector and matrix procedures to derive spatial equations of equilibrium, in which unknown componential displacements appear. The stiffness coefficients in the equations can be determined analytically, numerically or by pile load test. The pile group effect are estimated approximately, reducing the piles stiffness coefficients which depend on pile position and its mutual distances.

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“…Pile groups are widely used as a deep foundation to improve stability of the residential building, transmission tower, drilling platform, and several other types of infrastructure. Many researchers have been studying the bearing capacity, settlement, failure pattern, and transmission load mechanism of the pile group by means of theoretical analysis, model test, and numerical simulation, and they have also achieved considerable progress [1][2][3]. However, the pile group is a complex substructure system, and research on that involves many factors, such as load transfer, overall settlement, pile arrangement, and geological conditions.…”

Section: Introductionmentioning

confidence: 99%

Working Mechanism of Pile Group with Different Pile Spacing in Dense Sand

Chen

Namdar

et al. 2019

Advances in Civil Engineering

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Complex interaction mechanism exists between the pile group and soil. To realize the pile-soil load transmission mechanism in detail, the failure pattern of pile groups installed in dense sand considering different pile spacing was investigated by means of laboratory experimental model test and three-dimensional discrete element method. The results suggested that the narrow pile spacing was beneficial to the development of the pile tip resistance, and it enhanced the bearing performance of the pile group at the initial stage of settlement. The pile spacing changed the shaft resistance pattern with modification of the strain energy mechanism released within the subsoil. The pile group with 6b pile spacing had higher composite group efficiency. A joint fan-shaped displacement zone was formed beneath the pile tip for the pile group with 3b pile spacing; this pile foundation presented the block failure mechanism. The sand displacement beneath the cap for the pile group with 6b pile spacing mainly located on the upper part of the piles, the sand displacement around both sides of the piles presented asymmetric, and a relatively independent fan-shaped displacement zone was formed beneath the pile tip.

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Pile Group Settlement Estimation: Suitability of Nonlinear Interaction Factors

Cited by 23 publications

References 32 publications

Pile groups under axial loading: an appraisal of simplified non-linear prediction models

Pile groups under axial loading: an appraisal of simplified non-linear prediction models

Analytical Solution of Arbitrary Loaded Spatial Pile Group

Working Mechanism of Pile Group with Different Pile Spacing in Dense Sand

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