The compression shaft capacity of isolated piles embedded in sand is generally computed using semi-empirical correlations obtained by back-analysis of full-scale loading tests; due to the lack of full scale tension loading tests, the tension shaft capacity is commonly evaluated by reducing of about 10 to 25% the compression one. With the aim to obtain a deeper insight into this matter, a large amount of physical model tests on isolated, closed-ended, ideally non-displacement model piles, embedded in medium and high density specimens of fine silica sand, axially loaded in compression and in tension, using the ISMGEO geotechnical centrifuge, have been analysed. A large effort was paid to evaluate the effects of the grain size, the accelera-tion field and the arching, on the peak shear stress resistance mobilised at the pile – soil interface.
On the shaft capacity of non displacement piles in sand from centrifuge tests
FIORAVANTE, Vincenzo;GUERRA, Lara;
2010
Abstract
The compression shaft capacity of isolated piles embedded in sand is generally computed using semi-empirical correlations obtained by back-analysis of full-scale loading tests; due to the lack of full scale tension loading tests, the tension shaft capacity is commonly evaluated by reducing of about 10 to 25% the compression one. With the aim to obtain a deeper insight into this matter, a large amount of physical model tests on isolated, closed-ended, ideally non-displacement model piles, embedded in medium and high density specimens of fine silica sand, axially loaded in compression and in tension, using the ISMGEO geotechnical centrifuge, have been analysed. A large effort was paid to evaluate the effects of the grain size, the accelera-tion field and the arching, on the peak shear stress resistance mobilised at the pile – soil interface.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.