Unconfined Versus Confined Testing of Geosynthetics. Issue 3 (1999)

• Record Type: Journal Article
• Authors: Sawicki, A.; Świdziński, W.
• Is Part Of: Geosynthetics international. Volume 6:Issue 3(1999)
• Page Start: 157
• Page End: 169
• Publication Date: 1999
• Subjects: Geosynthetics -- Load-Extension -- Creep -- Unconfined tests -- Confined in-soil test; Geosynthetics -- Periodicals; Geosynthetics; Periodicals; 624.1892
• DOI: 10.1680/gein.6.0148
• Languages: English
• ISSNs: 1072-6349

Abstract

Abstract : 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.