DBPapers
DOI: 10.5593/SGEM2014/B12/S2.117

THE INFLUENCE OF GEOTECHNICAL INVESTIGATIONS MAGNITUDE ON CHARACTERISTIC VALUES OF SOILS PARAMETERS

E. Olinic
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 2, 915-920 pp

ABSTRACT
The main purpose of the geotechnical studies is to determine the physical and mechanical properties of the foundation soil. According to European regulations, geotechnical design shall be based on design values of geotechnical parameters derived from the characteristic values which are directly influenced by the number of determinations and the coefficient of variation (ratio of standard deviation and the mean value). The coefficient of variation, through the recommended maximum values for physical characteristics of soil, underlies the delimitation of geological strata. The aim of this paper is to show how the number of measurements and the coefficient of variation influence the characteristic values which, if are closer to the average, will lead to an effective and economic geotechnical design. If the difference between mean value and characteristic value is very high, this will lead to oversized geotechnical structures, and will generate much higher execution costs than the economy brought by theunderevaluated geotechnical study.

Keywords: geotechnical study, geotechnical parameters, characteristic values, geotechnical design