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| Content Provider | Springer Nature Link |
|---|---|
| Author | El Amrani Paaza, N. Lamas, F. Irigaray, C. Chacón, J. Oteo, C. |
| Copyright Year | 2000 |
| Abstract | The analysis of samples taken from the Neogene and Cretaceous marly series of the Granada and Guadix basins (south east Spain) shows an inverse correlation between the clay content and the residual friction angle. It has been verified that the carbonate fraction of the soil has a significant influence on the residual friction angle; there is a threshold of 25% carbonates, above which the value of φ′r increases from 20 to 30°. It has been proved that the presence of smectitic clay as the dominant constituent produces a low value of residual shear strength, associated with high fragility in unconsolidated undrained tests. It has been proved that the degree of compaction of the soil and therefore the initial porosity, has a direct influence on the effective residual friction angle (φ′r). L'analyse d'échantillons prélevés dans les séries marneuses du Néogène et du Crétacé des bassins de Grenade et de Guadix (sud-est de l'Espagne) montre une corrélation inverse entre la teneur en argile et l'angle de frottement résiduel. Il a été vérifié que la teneur en carbonates de ces sols a une influence significative sur l'angle de frottement résiduel ; il existe un seuil de 25% de carbonates, au-dessus duquel la valeur de φ′r augmente de 20 à 30°. Il a été prouvé que la présence de smectite comme minéral dominant de la fraction argileuse est la cause d'une faible valeur de résistance résiduelle au cisaillement, ainsi que d'une grande fragilité du matériau dans des essais non consolidés non drainés. Il a été prouvé que le degré de compacité de ces sols et, de ce fait, la porosité initiale, a une influence directe sur l'angle de frottement résiduel φ′r. |
| Starting Page | 99 |
| Ending Page | 105 |
| Page Count | 7 |
| File Format | |
| ISSN | 14359529 |
| Journal | Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur |
| Volume Number | 58 |
| Issue Number | 2 |
| e-ISSN | 14359537 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2000-02-22 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geology Geotechnical Engineering and Engineering Geology |
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