Setup of Driven Piles in Layered Soil

Lee, Wonje; Kim, Daehyeon; Salgado, Rodrigo; Zaheer, Mir

doi:10.3208/sandf.50.585

Cited by 33 publications

(12 citation statements)

References 23 publications

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“…Uncertainties involved in quantifying pile set-up were examined by Lim (2014), who found that all case histories (including some recently published results by Axtell et al, 2004;Erbland & McGillivray, 2004;Kolk et al, 2005;Shek et al, 2006;Kuo et al, 2007;Lee et al, 2010) suffered from at least one (and often many) of the following limitations (a) intrinsic limitations of assessing pile static capacity and, in particular, shaft capacity from dynamic load tests (DLTs) (b) inclusion of (undesired) short-term effects by taking the measurements at the end of initial driving (EOID) as the reference capacity (c) indefinite reference time at the EOID (d ) disruption of set-up behaviour due to various multiple restrikes in DLTs (e) under-mobilisation of ultimate pile capacity in DLTs and in static load tests (SLTs) ( f ) deficiencies in wave equation analyses including those associated with the superposition technique employed for large and long piles (g) inference of ageing from a combination of DLTs and SLTs (h) inference of shaft friction from un-instrumented piles loaded statically in compression (i) disruption of set-up potential due to tension re-tests in SLTs ( j) combining trends from tension and compression SLTs performed at different ageing periods.…”

Section: Existing Databasesmentioning

confidence: 99%

Characterisation of the effects of time on the shaft friction of displacement piles in sand

Lim

Lehane

2014

Géotechnique

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This paper describes a new approach to represent the effects of time on the shaft friction of displacement piles in sand. The proposal is based on the findings from pile test programmes performed at a test bed site in Western Australia in addition to data from well-documented full-scale pile tests. The investigation reveals a significant influence of installation disturbance on the subsequent gain in capacity (set-up) of shaft friction. Set-up is viewed as a recovery process, rather than a capacity gain, following the disturbance induced by pile installation. Gains in capacity in the medium and longer term tend to vary with the logarithm of time, while capacity changes shortly after installation are seen to be relatively small. A new expression is proposed to represent this ageing characteristic, which also incorporates a limiting (or maximum available) shaft friction.

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Section: Existing Databasesmentioning

confidence: 99%

Characterisation of the effects of time on the shaft friction of displacement piles in sand

Lim

Lehane

2014

Géotechnique

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“…Derzeitige Erfahrungen in der Nordsee prognostizieren Tragfähigkeitssteigerungen unterhalb und oberhalb dieses Ergebnisses. Insgesamt zeigen einige Ergebnisse wie die von Lee et al [12] einen Zuwachs der Tragfähigkeit, der einen logarithmischen Funktionsverlauf überschreitet, während andere, wie Tavenas et al [13] …”

Section: Aspekte Der Bemessungunclassified

Großmaßstäblicher Versuchsstand für zyklisch axial belastete Pfähle

Baeßler¹,

Rücker²,

Cuéllar³

et al. 2014

Stahlbau

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“…To date, many research efforts, ranging from field tests to theoretical studies, have D r a f t been performed to investigate the setup effect of a jacked pile in clay (e.g., Skov and Denver 1988;Lee et al 2010;Ng et al 2013a;Ng et al 2013b;Basu et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical approach for time-dependent load–settlement response of a jacked pile in clay strata

Sun

et al. 2017

Can. Geotech. J.

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Mechanical behaviour of the soil around a jacked pile changes significantly during pile installation and subsequent consolidation. Hence, an axially loaded jacked pile exhibits apparent time-dependent bearing performance after pile installation. This paper presents a semi-analytical approach to predict the time-dependent bearing performance of an axially loaded jacked pile in saturated clay strata. The effects of pile installation and subsequent consolidation on the changes in mechanical properties of the surrounding soil are modeled by the cavity expansion theory and the radial consolidation theory, respectively. An exponential function–based load-transfer (t–z) curve is employed to describe the nonlinear behaviour of the pile–soil interface during pile loading. The evolutions of the three-dimensional strength and shear modulus of the surrounding soil are subsequently incorporated into the two model parameters of the proposed t–z curve to capture the time-dependent pile–soil interaction behaviour. The time-dependent elastic response of the soil outside the pile–soil interface is also considered in the proposed approach. With the proposed load-transfer curve, an incremental algorithm and a corresponding computational code are developed for assessing the time-dependent load–settlement response of a jacked pile. To verify the proposed semi-analytical approach, predictions of the time-dependent load–settlement curves are compared with the measured values from pile tests at two sites. The good agreement shows that the time-dependent bearing performance can be reasonably predicted by the proposed approach.

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Setup of Driven Piles in Layered Soil

Cited by 33 publications

References 23 publications

Characterisation of the effects of time on the shaft friction of displacement piles in sand

Characterisation of the effects of time on the shaft friction of displacement piles in sand

Großmaßstäblicher Versuchsstand für zyklisch axial belastete Pfähle

Semi-analytical approach for time-dependent load–settlement response of a jacked pile in clay strata

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