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Based on a variety of case histories of site investigations, including extensive bore hole data, laboratory testing
and geophysical prospecting at more than 550 construction sites, an empirical formulation is proposed for the rapid determination
of allowable bearing pressure of shallow foundations in soils and rocks. The proposed expression corroborates
consistently with the results of the classical theory and is proven to be rapid, and reliable. Plate load tests have been
also carried out at three different sites, in order to further confirm the validity of the proposed method. It consists of only
two soil parameters, namely, the in situ measured shear wave velocity and the unit weight. The unit weight may be also
determined with sufficient accuracy, by means of other empirical expressions proposed, using P or S - wave velocities.
It is indicated that once the shear and P-wave velocities are measured in situ by an appropriate geophysical survey, the
allowable bearing pressure as well as the coefficient of subgrade reaction and many other elasticity parameters may be
determined rapidly and reliably.