Volume 35, N. 1

January-April 2012

Estimating Young Moduli in Sands from the Normalized N60 Blow Count

Article

Volume 35, N. 1, January-April 2012 | DOWNLOAD PDF (56 downloads)

Abstract

This paper presents statistical correlations between the static Young modulus Es and the normalized SPT penetration resistance N60 (corresponding to 60% of the theoretical energy of the SPT test) for preliminary estimation of settlements in sedimentary sands. The correlations have been established through the statistical interpretation of many experimental studies available in the literature, based on power regression analyses. Equations and charts are presented to estimate the mean value Es and related statistical limits of Es as a function of N60. The obtained correlations have been used to compare the calculated settlements of a rigid raft bearing on a multi-layered sand deposit (comprising distinct relative densities) with the measured settlements in eight points underneath the raft.

Keywords: Sand compressibility, Normalized SPT, Young modulus, Correlations,


Submitted on March 15, 2011.
Final Acceptance on April 03, 2012.
Discussion open until September 30, 2012.
DOI: 10.28927/SR.351089