Simplified solutions for computing consolidation settlement of foundations embedded in a compressible finite stratum

Abstract

Evaluation of one-dimensional consolidation settlement, which is a function of soil properties and loading profile, is an essential requirement for foundation design. This study presents novel solutions to determine the stress increment required to calculate the settlement of a compressible soil stratum. A systematic procedure is developed to compute the stress increment for different foundations and soil layouts by using the elastic methods available in literature. The solutions are presented in a series of charts and straightforward formulas. They are invaluable particularly when soil compressibility is variable or if loaded foundation is not directly over the compressible soil. Reliability of solutions is validated by comparing the results with those obtained by classical methods. Illustrative examples are included to demonstrate the effectiveness of the developed procedure in practice. The suggested solutions can be directly implemented into preliminary design of foundations allowing valid settlement estimation, or can be used for dimensioning footings under a certain allowable settlement.