Back Analysis of Soft Clay Behaviour Under Highway Embankments

The experiences of embankment settlement measurements and the correlation of CPT resistance and deformation properties of soft Holocene clays are discussed in this paper. Embankment settlement measurement results of nine different sites have been studied, the significant parameters have been defined, and the deformation properties have been back calculated. The correlation between the determined deformation properties (Eoed, E50) and the obtained CPT results are evaluated and an empirical coefficient α is determined for each test. The scatter of this coefficient is determined and a formula is proposed to obtain more reliable α values for the studied Holocene clays.