Abstract: The direct measurement of shear wave velocity of stratum is obviously preferable, but the establishment of correlation among various in-situ parameters is beneficial to understanding the law of soil stress and deformation, to comprehensively reflect the internal relationship among soil mechanical parameters and other in-situ methods can obtain more accurate estimates in the absence of in-situ shear wave velocity measurement. In this paper, by selecting and analyzing the in-situ test at six different sites in Wuhan. The paper examines the correlations to obtain rough estimates of the shear wave velocity V_s from conventional dilatometer tests (DMT) and cone penetration tests (CPT). The experimental results suggest that the DMT predictions of V_s  from the parameters I_D (material index), K_D (horizontal stress index), M_DMT (constrained modulus) are more reliable and consistent than the CPT predictions from q_c (cone resistance), presumably because of the availability, by DMT, of the stress history index K_D .

Key words: Flat Dilatometer Tests, Cone Penetration Test, Over-consolidation Soil, In-situ Test, Shear Wave Velocity