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Ratcheting convective cells of sand grains around offshore piles under cyclic lateral loads

  • Sand densification around the pile has traditionally been regarded as an explanation for the grain migration and soil subsidence that often occur around cyclic laterally loaded piles embedded in sand. Supported by new empirical evidence, this paper proposes that, additionally to some soil densification around the pile, the main cause for the continuous "steady-state" grain migration is a convective cell flow of sand grains in the vicinities of the pile head. Such convective flow would be caused by a ratcheting mechanism triggered by the cyclic low-frequency lateral displacements of the pile. Furthermore, the experimental results suggest that the limit between the convective cell and the static soil is marked by a distinct direct shear surface. This might shed some light into the complex phenomena related to the pile-soil interaction in the upper layers of the bedding, which are normally the main contributor for the lateral load-bearing capacity of piles.

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Metadaten
Autoren/innen:Pablo Cuéllar, Matthias Baeßler, Werner Rücker
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Granular matter
Jahr der Erstveröffentlichung:2009
Verlag:Springer
Verlagsort:Berlin ; Heidelberg
Erste Seite:1
Letzte Seite:12(?)
Freie Schlagwörter:Convection; Cyclic lateral load; Densification; Grain migration; Pile foundation; Ratcheting
DOI:https://doi.org/10.1007/s10035-009-0153-3
ISSN:1434-5021
ISSN:1434-7636
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:19.10.2009