Dynamic elasticity characteristics of soil layers not deeply situated under the earth surface

If a simplified elasticity model of the soil is considered sufficiently precise for practical use, the problem of values of elasticity modulus, Poisson ratio and wave velocities so as their change with depth in the shallow soil layers should be determined. The paper presents results of investigations of the above mentioned characteristics in situ for cohesive soil. The changes with depth are fundamental for practical applications. More details of the conducted investigations the Reader can find in the monography Ciesielski et al. (1999).