Titre :
|
Unconfined versus confined testing of geosynthetics
|
Auteurs :
|
A. Sawicki ;
W. Swidzinski
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1999
|
Format :
|
p.157-169
|
Langues:
|
= Anglais
|
Catégories :
|
MATERIAUX
|
Mots-clés:
|
GEOSYNTHETIQUE
;
RENFORCEMENT DU SOL
;
ESSAI AU LABORATOIRE
;
PROPRIETE DES MATERIAUX
|
Résumé :
|
A theoretical explanation of the confined in-soil behaviour of geosynthetics is presented and compared to standard unconfined load-extension and creep test results. First, it is shown that confined, load-instantaneous geosynthetic extension problems can be successfully described by a pull-out model of a single geosynthetic reinforcement strip in soil. The confined in-soil stiffness of a geosynthetic is derived analytically as a function of the unconfined stiffness and the stiffness of the soil-geosynthetic strip interface. Second, the problem of confined in-soil creep is analysed on the basis of a similar model that takes into account the rheological properties of geosynthetics. Generally, it is shown that the confined in-soil behaviour of geosynthetics can be predicted on the basis of the unconfined properties of geosynthetics and the soil-geosynthetic strip interface stiffness. Practical examples show good agreement between the proposed models and the experimental data.
|
Source :
|
Geosynthetics international, vol 6, n°3
|