DBPapers
DOI: 10.5593/SGEM2015/B12/S2.083

SENSIBILITY OF GRAVELLY SOILS SHEAR STRENGTH PARAMETERS ON THE SIZE OF SPREAD FOUNDATION

G. Nguyen
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-32-2 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 2, 627-632 pp

ABSTRACT
The paper deals with sensibility of gravelly soils shear strength parameters on the size of spread foundation. Minimal, intermediate and maximal values of shear strength parameters of 5 classes of gravelly soil (GW, GP, G-F, GM and GC) introduced in the old Slovak Technical Standard STN 731001 had been used to design model spread foundation, posted by Orr (2005). The spread foundation was designed by design approaches mentioned in Eurocode 7, Part 1 (DA1-C1; DA1-C2; DA2 and DA3) and also by the old and new Slovak Technical Standard. It will be shown that for all values of gravelly soils shear strength parameters; the size of foundation is the biggest when designed by the DA3 and the smallest when designed by the DA1-C1. Concerning the old and new Slovak Technical Standard, for all values of gravelly soils shear strength parameters, the size of foundation designed by the new Slovak Technical Standard is smaller in comparison with the old Slovak Technical Standard. It will be also shown that small difference in angle of internal friction (4o) of soil GW causes difference in foundation size up to 37.0% and small difference in angle of internal friction (2.5o) and cohesion (4kPa) of soil GM causes difference in foundation size up to 27.0%.

Keywords: gravelly soils, shear strength parameters, Eurocode 7, STN 73 1001, spread foundation.