empirical correlation between shear wave velocity and spt test in soils of ahvaz city

 the shear wave velocity (vs), as an important parameter in amplification studies, is usually obtained by performing wave propagation tests in the field. but it is often not economically feasible to conduct these tests at all the sites. therefore, a reliable empirical correlation between vs and spt-n would be a considerable advantage. this paper presents the development of a reliable regression equation between vs and spt-n based on the results of downhole and multi channel analysis of surface wave (masw) tests. in ahvaz city, the soil layers are mainly consisted of medium silty clay, stiff clay and medium sand with thicknesses varying from a few meters to 10m. the masw tests results were compared with other tests. an empirical correlation between vs and spt-n was developed. the regression equation developed in this study was compared with some other correlations and exhibits good predictions. it can be used for sites which predominantly consist of very medium to very stiff clay and very medium to dense sand.