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An Improved Empirical Equation for Uniaxial Soil Compression for a Wide Range of Applied Stresses

Dep. of Agronomy, Pennsylvania State Univ., University Park, PA 16802

View larger version (15K): [in a new window]   Fig. 1. Bulk density of three soils plotted as a function of the applied stress plus one. Points represent experimental data. The smooth lines are best-fit nonlinear regression curves based on the three-parameter version of Eq. [3]

View larger version (16K): [in a new window]   Fig. 2. A partial set of data represented by the best-fit dashed line from Eq. [3] for a sample of the Rayne soil. The complete data set is shown in Fig. 1. The various points and lines are discussed in the text to illustrate calculations

View larger version (14K): [in a new window]   Fig. 3. Preconsolidation stress plotted as a function of the parameter derived from fitting Eq. [3] to 119 sets of soil-compression data. The smooth line is the nonlinear regression curve based on Eq. [4]

View larger version (14K): [in a new window]   Fig. 4. Plot of the inverse of the compression index as a function of a grouping of parameters, (m - o)mn, derived from fitting Eq. [3] to 119 sets of soil-compression data. The smooth line is the nonlinear regression curve based on Eq. [5]

View larger version (12K): [in a new window]   Fig. 5. The elastic rebound/recompression parameter, K, plotted as a function of a grouping of parameters, (m - o)(1 - 1/2m)/(-log ), derived from fitting Eq. [3] to 119 sets of soil-compression data. The smooth line is from Eq. [7]