Centrifuge investigation of load transfer mechanisms in a granular mattress above a rigid inclusions network
| Autor: | Gérard Rault, Matthieu Blanc, Luc Thorel, Marcio de Souza Soares de Almeida |
|---|---|
| Přispěvatelé: | Terrassements et Centrifugeuse (IFSTTAR/GERS/TC), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia (COPPE-UFRJ), Universidade Federal do Rio de Janeiro (UFRJ) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
0211 other engineering and technologies RENFORCEMENT DES SOLS 02 engineering and technology INCLUSION [SPI]Engineering Sciences [physics] GEOSYNTHETIQUE General Materials Science Geotechnical engineering Reinforcement 021101 geological & geomatics engineering Civil and Structural Engineering 021110 strategic defence & security studies Centrifuge CENTRIFUGEUSE GEOTECHNIQUE Settlement (structural) REMBLAI TRANSFERT [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] Geotechnical Engineering and Engineering Geology MODELISATION Substrate (building) Tray Soil reinforcement Compressibility Reduction (mathematics) CHARGE |
| Zdroj: | Geotextiles and Geomembranes Geotextiles and Geomembranes, Elsevier, 2013, 36, p92-105. ⟨10.1016/j.geotexmem.2012.12.001⟩ |
| ISSN: | 0266-1144 |
| DOI: | 10.1016/j.geotexmem.2012.12.001⟩ |
| Popis: | Reinforcing compressible soils by rigid inclusions is a method to reduce and homogenize settlements under many types of structures. A granular mattress, set between the structure and the group of inclusions, transfers by arching effects a part of loadings to the piles embedded in rigid substrate. A geosynthetic can be added between the heads of the rigid inclusions and the granular mattress. In addition to the arching effect, a membrane effect happens caused by the stretching of the geosynthetic sheet. An experimental mobile tray device, especially designed to test this reinforcement technique in centrifuge at 20 g , consists in simulating the settlement of the soft soil located between the inclusions. An initial pretension can be applied to the geosynthetic. A parametric study of the load transfer mechanisms in the mattress is conducted with three different thicknesses of granular mattress, two different rigid inclusions networks and different initial pretensions in the geosynthetic. The efficacy of the load transfer and the settlements at the surface of the granular mattress are studied and discussed. With and without geosynthetic reinforcement, load transfer mechanisms are better for thicker load transfer mattresses and for higher mesh densities. The improvement made by a geosynthetic reinforcement is clearly shown trough both load transfer and differential settlement reduction. |
| Databáze: | OpenAIRE |
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