Parâmetros dinâmicos de um solo tropical a partir de ensaios cross-hole.

Abstract

Cmss-hole test results carried out in a tropical clayey sand from Pederneiras city, in the central western region in Sao Paulo State are presented. The attained results show the advantages of using different seismic sources in order to determine the Young and maximum shear modulis and the Poisson ratio This dissertation deals with the limitations of the traditional correlation used to estimate maximum shear modulus (Go) based from SPT test results, as well as the validation of the specific correlation to estimate Go for the studied soil. The differences between dynamic soil properties calculated based on results from two different cross-hole tests are pointed. The differences can be related to soil variability that can be associated to the genetic characteristics and to the partially saturated soil condition as well as to a probable anisotropy, since the cross-hole tests were carried out in almost orthogonal directions. In this case, correlations to estimate maximum shear modulus based a current in situ tests, such us SPT, is difficult to be established.