Experimental Application of Fractal Theory into Selection of Subgrade Filling Materials

Abstract:

To investigate the settlement deformation of subgrades, we used fractal theory and soil section technology to study the original foundation soil, and soils filled with 4%, 8%, 12%, 16%, 20% and 24% of A material. The results show that under consolidation pressure of 500 KPa and after one dry-wet circulation, the fractal dimension was 1.7 in the original soil, 1.78 in the soil filled with 4% A material, and 1.93 in the soil filled with 24% A material. Along with the increased dopant amount of A material, the fractal dimension of soil mass gradually increased, but after the dopant amount reached 24%, the increasing rate was very slow. With the increased addition of A material, the compression deformation gradually weakened, but after the dopant amount reached 24%, the changing rate was very small. We derived a prediction model between the dopant amount at a certain particle size and the fractional dimension. This model can be used to predict the dopant amount at a certain size. The reasonableness of this model when using single size was validated via engineering practice.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 61-67
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.61
• Online since: July 2014
• Authors: Xi Gang Wang*
• Keywords: Dopant Amount, Fractional Dimension, Prediction Model, Settlement and Deformation

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