Pile Capacity in Calcareous Sands: State if the Art

Murff, James D.

doi:10.1061/(asce)0733-9410(1987)113:5(490)

Cited by 92 publications

(19 citation statements)

References 28 publications

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“…It is widely accepted that the capacity of driven piles in breakable weak sands such as calcareous sands is only a fraction of the capacity of driven piles in strong sands such as quartz sands (Gilchrist, 1985;Murff, 1987). This difference could be attributed initially to the reduction of the mobilised angle of shearing resistance that is associated with particle crushing in weak sands, because several researchers have found that the angle of shearing resistance decreases as a consequence of particle crushing (Bishop, 1966;Bolton, 1986).…”

Section: Introductionmentioning

confidence: 99%

DEM analysis of crushing around driven piles in granular materials

Lobo-Guerrero

Vallejo

2005

Géotechnique

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Section: Introductionmentioning

confidence: 99%

DEM analysis of crushing around driven piles in granular materials

Lobo-Guerrero

Vallejo

2005

Géotechnique

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“…Nauroy and Le Tirant (1983), for example, found limiting values to be proportional to the compressibility index of the soil raised to a negative power. Limiting values for use with calcareous sands are summarized by Aggarwal et al (1979) and by Murff (1987) and are not repeated here.…”

Section: Introductionmentioning

confidence: 99%

Computing axial pile capacity in sands for offshore conditions

LelandM.

1990

Marine Geotechnology

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The application of a new criterion to compute the axial capacity of pipe piles driven into sands is described for offshore conditions. The new criterion is tested, independently, against measured capacities from 64 pile load tests and is compared with current recommended practice of API RP2A. These comparisons show that the new criterion is more reliable than the current API criterion and that the new criterion can provide greater capacities for long, large-diameter pipe piles used in the marine environment. Topics also discussed include (1) the use of limiting values for unit shaft resistance and unit end bearing, (2) computing the capacity of piles in layered soil profiles, (3) the soil plug resistance in overcoming end bearing resistance, and (4) the influence of rate of loading and cyclic loading on pile capacity. A few examples are included to demonstrate the applications.

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“…The importance of this grain breakage in silica sand during pile penetration has been highlighted from a practical standpoint [3,4,[12][13][14][15][16][17][18]. Numerous studies have shown that the pile resistance in crushable sand is overestimated in comparison with that expected by a conventional simulation platform without considering grain breakage [1,3,[19][20][21]. Accordingly, the degrading effect of grain breakage on pile resistance should be considered for practical design, which poses a requirement that the constitutive model accounting for grain breakage should be employed in the numerical platform.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of pile penetration in silica sands considering the effect of grain breakage

Jin

Yin

et al. 2018

Finite Elements in Analysis and Design

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Current numerical platforms rarely consider the effect of grain breakage in the design of sandy soil foundations. This paper presents an enhanced platform for large deformation analyses which considers the effect of grain breakage during pile penetration in silica sand. For this purpose, a model based on critical state theory has been developed within the framework of multisurface plasticity to account in the same constitutive platform the effect of stress dilatancy and particle fragmentation. Furthermore, to implement the underlying constitutive equations into a finite element code, a stress integration scheme has been adopted by extending a cutting plane algorithm to the model with multiple yielding mechanisms. A laboratory model test and a series of centrifuge tests of pile penetration are simulated to verify the performance of the selected constitutive approach in terms of pile resistance and grain breakage distribution, with the parameters of sand calibrated through a set of drained triaxial compression tests from low to very high confining pressure. Some extra features of the enhanced platform are also discussed, such as: i) the effect of sand crushability on pile resistance and ii) the nonlinear relation of pile resistance to sand density. The proposed findings demonstrate the capability of this numerical platform to proper design of pile foundation in sandy soils and highlight the interplay between stress dilatancy and grain breakage mechanisms during pile penetration processes.

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Pile Capacity in Calcareous Sands: State if the Art

Cited by 92 publications

References 28 publications

DEM analysis of crushing around driven piles in granular materials

DEM analysis of crushing around driven piles in granular materials

Computing axial pile capacity in sands for offshore conditions

Numerical modeling of pile penetration in silica sands considering the effect of grain breakage

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