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Failure of a trial embankment on peat in booneschans, the netherlands / C. Zwanenburg in Géotechnique, Vol. 62 N° 6 (Juin 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 6 (Juin 2012) . - pp. 479 –490 Titre : Failure of a trial embankment on peat in booneschans, the netherlands Type de document : texte imprimé Auteurs : C. Zwanenburg, Auteur ; E.J. Den Haan, Auteur ; G.A.M. Kruse, Auteur Année de publication : 2012 Article en page(s) : pp. 479 –490 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Organic  soils  Full-scale  tests  Failure  Embankments  Laboratory  tests Résumé : A trial embankment 6 m high was built on peat in the Netherlands, and brought to failure. The aim was to test whether innovative sensor technology could detect incipient failure in time. However, the data generated also made it possible to conduct a geotechnical assessment of stability. The paper discusses the relation between the parameters derived from laboratory tests, field measurements and behaviour observed in the field. Problems encountered in the standard triaxial testing of peat samples are discussed, as the samples tend to fail in tension. A trial pit through the failed embankment showed that there were wide tension cracks in the peat layer, indicating that the peat layer failed in tension, at least locally. However, horizontal movement dominates the overall failure mechanism. As an alternative to triaxial testing, direct simple shear (DSS) testing for the assessment of peat parameters is considered. The results of the DSS tests correspond well with field measurements and the back-analysis of the failure. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.P.094 [article] Failure of a trial embankment on peat in booneschans, the netherlands [texte imprimé] / C. Zwanenburg, Auteur ; E.J. Den Haan, Auteur ; G.A.M. Kruse, Auteur . - 2012 . - pp. 479 –490. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 6 (Juin 2012) . - pp. 479 –490 Mots-clés : Organic  soils  Full-scale  tests  Failure  Embankments  Laboratory  tests Résumé : A trial embankment 6 m high was built on peat in the Netherlands, and brought to failure. The aim was to test whether innovative sensor technology could detect incipient failure in time. However, the data generated also made it possible to conduct a geotechnical assessment of stability. The paper discusses the relation between the parameters derived from laboratory tests, field measurements and behaviour observed in the field. Problems encountered in the standard triaxial testing of peat samples are discussed, as the samples tend to fail in tension. A trial pit through the failed embankment showed that there were wide tension cracks in the peat layer, indicating that the peat layer failed in tension, at least locally. However, horizontal movement dominates the overall failure mechanism. As an alternative to triaxial testing, direct simple shear (DSS) testing for the assessment of peat parameters is considered. The results of the DSS tests correspond well with field measurements and the back-analysis of the failure. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.P.094