Solution charts for the consolidation of double soil layers

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Abstract
This technical note presents solution charts for determining the average degree of consolidation of double soil layers for both one-way and two-way drainage. The influence of two newly introduced independent parameters on the average degree of consolidation is examined. The solution procedure is described clearly. When the compressibility, permeability, and thickness of the material making up each layer are given, the charts can be used to obtain the average degree of consolidation of the double soil layers for consolidation settlement calculations.Key words: consolidation, double soil layers, solution charts, drainage, settlement, soil.