Issue |
Rev. Fr. Geotech.
Number 173, 2022
|
|
---|---|---|
Article Number | 4 | |
Number of page(s) | 16 | |
DOI | https://doi.org/10.1051/geotech/2023002 | |
Published online | 06 April 2023 |
Article d’ingénierie / Engineering Article
Écrouir le fluage des sols mous par préchargement
Creep hardening of soft soils by preloading fills
10 allée Robert Schumann, 78670 Villennes-sur-Seine, France
* Auteur de correspondance : baguelin.consultant@gmail.com
Dans le cas de construction d’un remblai sur un site de sols mous, le préchargement est souvent utilisé, conjointement avec des drains verticaux, pour réduire, d’une part, le délai de construction et, d’autre part, l’amplitude du tassement en service. Une méthode de calcul de l’écrouissage du fluage est présentée dans ces conditions sur la base du modèle de fluage de Bjerrum (1967 : Engineering geology of Norvegian normally-consolidated marine clays as related to settlements of buildings. Géotechnique 17: 81–118). On illustre son application sur le chantier des parkings du magasin IKEA à Bayonne, avec sa confrontation aux mesures de tassement sur un an.
Abstract
When constructing a fill on soft soils preloading is often used, together with vertical drains, to reduce the construction time on one hand and, on the other hand, the amplitude of settlements during service. A calculation method of creep hardening under these conditions is presented, based on Bjerrum’s creep model (1967: Engineering geology of Norvegian normally-consolidated marine clays as related to settlements of buildings. Géotechnique 17: 81–118). Its application is shown on the case of the construction of parking areas of the IKEA store in Bayonne, with a check with 1-year settlement measurements.
Mots clés : fluage / consolidation / déjaugeage de charge / ajustement par moindres carrés / intervalles de confiance / mesures en place
Key words: creep / consolidation / buoyancy effect on loads / least squares adjustment / confidence intervals / in situ measurements
© CFMS-CFGI-CFMR-CFG, 2023
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