Regression analysis of soil compressibility

A detailed study was carried out to determine the correlations between consolidation properties such as compression index, overconsolidation ratio and various index properties based on test results obtained from 300 soil samples. All of the tests were conducted in the I.T.U. Soil Mechanics Laboratory on samples taken from different construction sites distributed throughout Turkey during the last forty years. Different regression models were utilized and the most suitable relationships with the highest correlation coefficients were established. These developed relationships are compared with similar relationships suggested by various researchers. The proposed correlations appear to be very simple and practically applicable in assessing the consolidation of the soil layers most encountered in Turkey.