Characteristic values of ground parameters and probability of failure in design according to Eurocode 7

Abstract

Limit state design applied to geotechnical structures requires the selection of characteristic values of ground parameters and the use of partial safety factors. These factors, and the way that characteristic values are selected, will govern the calculated probability of failure of the structure. The paper presents a methodology for estimating the probability of failure provided by the application of Eurocode 7 to the design of spread foundations and embankments. A parametric study is presented enabling the identification of the reduction factors by which the mean value of soil resistance parameters should be multiplied to obtain the characteristic value that will ensure a target probability of failure.