EVALUATION OF GROUND CONSTANT VARIATIONS BASED ON HIGH CONSISTENT GROUND INVESTIGATION RESULTS

Abstract

The dispersion in the characteristics of adjacent ground is examined based on the several cone penetration tests. It is shown that (1) N-values in the same stratum vary due to the small shift in the depth of the hard and soft points, and are in good agreement if the depth is corrected; (2) Althought the coefficient of variation from the all measured data is large, the mean value coefficient from certain range of depth is comparatively small; (3) It is conclude that the coefficient of variation used for a pile skin friction has to be selected based on the mean values within a certain range of depth.