| Titre : | Hyperbolic model for load tests on instrumented drilled shafts in intermediate geomaterials and rock (2013) |
| Auteurs : | Ramesh Chandra Gupta, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of geotechnical and geoenvironmental engineering (Vol. 138 N° 11, Novembre 2012) |
| Article en page(s) : | pp. 1407-1414 |
| Note générale : | Géotechnique |
| Langues : | Anglais |
| Tags : | Load tests O-cell load Drilled shafts Rock mass modulus Rock-socket side friction Intermediate geomaterials Ultimate frictional resistance End bearing |
| Résumé : | Analyses of load tests on instrumented drilled shafts in intermediate geomaterials (IGMs) and rock are performed using a hyperbolic model for relative displacement (Δ)/shaft diameter (d)versus side friction (fs) data. Ultimate side friction (fsu) determined from these analyses for IGMs compares well with those determined from pressuremeter tests. For rock with a rock quality designation (RQD) greater than 50%, values of fsu are approximately equal to rock socket unit friction (qSR), estimated using 28-day strength (f′c) of drilled shaft concrete, but for RQD less than 50%, fsu is approximately equal to qSR, estimated using uniaxial strength (qu) of rock cores and reduction factor (αE) to account for jointing in rock. Linear elastic shear modulus (G) for IGMs determined from these analyses is approximately equal or slightly less than reload modulus (Gr) determined from the pressuremeter test. Rock mass modulus (Em) also matches with values determined from correlations. |
| ISSN : | 1090-0241 |
| En ligne : | http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000697 |
