To evaluate the capability of centrifuge physical model to catch the main aspects of the shaft friction mobilisation of non displacement piles in sand, a series of centrifuge tests were carried out by axially loading an instrumented model pile embedded without displacement, in homogeneous dry sand. Three model piles with different roughness have been combined with two silica sands (Toyoura and FF) with different grain size. After a description of the experimental set-up, test results were analysed with reference to the current practice ( method). Moreover, the effects of the normalised pile skin roughness, Rn, on the shear stress mobilised have been investigated. Finally, the shaft friction mechanisms observed from centrifuge tests, were interpreted by direct shear tests on sand/rigid plate interface under constant normal stiffness.
On the Shaft friction modelling of non-displacement piles in sand
FIORAVANTE, Vincenzo
2002
Abstract
To evaluate the capability of centrifuge physical model to catch the main aspects of the shaft friction mobilisation of non displacement piles in sand, a series of centrifuge tests were carried out by axially loading an instrumented model pile embedded without displacement, in homogeneous dry sand. Three model piles with different roughness have been combined with two silica sands (Toyoura and FF) with different grain size. After a description of the experimental set-up, test results were analysed with reference to the current practice ( method). Moreover, the effects of the normalised pile skin roughness, Rn, on the shear stress mobilised have been investigated. Finally, the shaft friction mechanisms observed from centrifuge tests, were interpreted by direct shear tests on sand/rigid plate interface under constant normal stiffness.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
