Numerical simulation of the installation process of full displacement piles

Pucker, Tim; Grabe, Jürgen

doi:10.1016/j.compgeo.2012.05.006

Cited by 64 publications

(18 citation statements)

References 12 publications

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“…A 'general contact' algorithm by means of an enhanced immersed boundary method describes frictional contact between Lagrangian and Eulerian materials. Advanced soil constitutive models, such as a hypoplastic model for sand, a visco-hypoplastic model for clay and a modified Tresca model considering strain softening and rate-dependency of clay, have been incorporated into the CEL [27,26,12]. To date, CEL is limited to total stress analysis, although it can be modified to obtain pore pressures under undrained conditions [50].…”

Section: Introductionmentioning

confidence: 99%

Large deformation finite element analyses in geotechnical engineering

Wang

Bienen

Nazem

et al. 2015

Computers and Geotechnics

233

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a b s t r a c tGeotechnical applications often involve large displacements of structural elements, such as penetrometers or footings, in soil. Three numerical analysis approaches capable of accounting for large deformations are investigated here: the implicit remeshing and interpolation technique by small strain (RITSS), an efficient Arbitrary Lagrangian-Eulerian (EALE) implicit method and the Coupled Eulerian-Lagrangian (CEL) approach available as part of commercial software. The theoretical basis and implementation of the methods are discussed before their relative performance is evaluated through four benchmark cases covering static, dynamic and coupled problems in geotechnical engineering. Available established analytical and numerical results are also provided for comparison purpose. The advantages and limitation of the different approaches are highlighted. The RITSS and EALE predict comparable results in all cases, demonstrating the robustness of both in-house codes. Employing implicit integration scheme, RITSS and EALE have stable convergence although their computational efficiency may be low for high-speed problems. The CEL is commercially available, but user expertise on element size, critical step time and critical velocity for quasi-static analysis is required. Additionally, mesh-independency is not satisfactorily achieved in the CEL analysis for the dynamic case.

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Section: Introductionmentioning

confidence: 99%

Large deformation finite element analyses in geotechnical engineering

Wang

Bienen

Nazem

et al. 2015

Computers and Geotechnics

233

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“…However, the effect of a pile installation has a significant influence on the pile's resistance. Some possibilities for the numerical modelling of pile installations have been published by, e.g., Sheng et al, 2005;Kim, Jeong, 2011;Dijkstra et al, 2011;Pucker, Grabe, 2012. The mechanical behaviour of soils can be modelled with various degrees of accuracy. Due to this fact, selecting an appropriate constitutive model has a significant influence on the accuracy of the solutions.…”

Section: Numerical Simulation Of the Pile Foundationmentioning

confidence: 99%

Comparison of Numerical Analyses with a Static Load Test of a Continuous Flight Auger Pile

Holko

Stacho

2014

Slovak Journal of Civil Engineering

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The article deals with numerical analyses of a Continuous Flight Auger (CFA) pile. The analyses include a comparison of calculated and measured load-settlement curves as well as a comparison of the load distribution over a pile's length. The numerical analyses were executed using two types of software, i.e., Ansys and Plaxis, which are based on FEM calculations. Both types of software are different from each other in the way they create numerical models, model the interface between the pile and soil, and use constitutive material models. The analyses have been prepared in the form of a parametric study, where the method of modelling the interface and the material models of the soil are compared and analysed. Our analyses show that both types of software permit the modelling of pile foundations. The Plaxis software uses advanced material models as well as the modelling of the impact of groundwater or overconsolidation. The load-settlement curve calculated using Plaxis is equal to the results of a static load test with a more than 95 % degree of accuracy. In comparison, the load-settlement curve calculated using Ansys allows for the obtaining of only an approximate estimate, but the software allows for the common modelling of large structure systems together with a foundation system.

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“…The study of global-scale GRCSE mechanisms through full-scale case studies as well as laboratory-scale physical modelling and centrifuge modelling is far less common. However, current finite element method (FEM) numerical techniques are limited in their ability to model largestrain problems such as pile installation (Wię ckowski 2004) and generally advanced methods such as Coupled Eulerian-Lagrangian (CEL) (Qiu et al 2011;Pucker and Grabe 2012) or pointbased (meshless) methods such as smooth particle hydrodynamics (SPH) (Bui et al 2008) or the material point method (MPM) are required. In some cases, "work-around" methods are adopted within a FEM analysis to account for installation effects.…”

Section: Introductionmentioning

confidence: 99%

Geosynthetic reinforced column supported embankments and the role of ground improvement installation effects

King

Bouazza

Gniel³

et al. 2018

Can. Geotech. J.

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For geosynthetic reinforced column supported embankments (GRCSE) supporting a high embankment, lateral forces associated with lateral sliding and embankment stability often govern the acceptability of a given design under serviceability conditions. Frequently, the complex soil–structure–geosynthetic interaction, the size, and the three-dimensional nature of a GRCSE necessitate the use of numerical analysis to assess embankment performance relative to serviceability criteria. However, traditional finite element method techniques used to model serviceability behaviour are limited in their ability to model the geotechnical mechanisms associated with column installation, equilibration, and group installation effects. These installation effects are examined herein based on a GRCSE field case study located in Melbourne, Australia, that has been extensively instrumented. The role that these installation effects have on the performance of the GRCSE is highlighted and the behaviour of the columns supporting the embankment is emphasized. It is shown that cracking of the unreinforced columns supporting the embankment is likely inevitable and that the reduction of lateral resistance provided by the columns should be accounted for in design. The suitability of various numerical approaches currently used in design to model the columns supporting the GRCSE, and the embankment itself, are discussed and recommendations are made.

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Numerical simulation of the installation process of full displacement piles

Cited by 64 publications

References 12 publications

Large deformation finite element analyses in geotechnical engineering

Large deformation finite element analyses in geotechnical engineering

Comparison of Numerical Analyses with a Static Load Test of a Continuous Flight Auger Pile

Geosynthetic reinforced column supported embankments and the role of ground improvement installation effects

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