A study of grain crushing around penetrating piles using a micromechanics-based continuum model

Chunshun Zhang, Itai Einav, Giang Nguyen

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Abstract

The effects of grain crushing during pile penetration into crushable granular media are studied using a novel constitutive model (Einav, 2007b). This model is developed using clear micromechanics-based links between an internal variable, called breakage, and the evolving grain size distribution (gsd) due to grain crushing. In particular, using a Finite Element implementation of this breakage model, we now have more rigorous access to many field quantities that have been difficult to quantify/predict using previous continuum models. For example, in this paper we combine the breakage model with an Eulerian Finite Element (FE) method to predict the evolution of gsd surrounding penetrating piles, followed by the calculation of the associated permeability reduction. We address the importance of faithfully predicting the permeability reduction due to grain crushing, as this crushing is found to be the dominant mechanism governing the permeability change of the material in pile penetration. The results are assessed against experimental counterparts to demonstrate the capabilities of our model in this particular geotechnical application.
Original languageEnglish
Title of host publicationComputational Geomechanics, COMGEO II-Proceedings of the 2nd International Symposium on Computational Geomechanics
Subtitle of host publicationCavtat-Dubrovnik, Croatia, 27-29 April 2011
PublisherInternational Centre for Computational Engineering (IC2E)
Pages714-720
Number of pages6
ISBN (Print)9789609875011
Publication statusPublished - 2011
Externally publishedYes
EventInternational Symposium on Computational Geomechanics 2011 - Hotel Croatia, Cavtat-Dubrovnik, Croatia
Duration: 27 Apr 201129 Apr 2011
Conference number: 2nd

Conference

ConferenceInternational Symposium on Computational Geomechanics 2011
Abbreviated titleComGeo 2011
CountryCroatia
CityCavtat-Dubrovnik
Period27/04/1129/04/11

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