Chapter
Jun 20, 2018
Numerical Study of Undrained 1D Compression for Unsaturated Soil
Authors: Kaitlin M. Hall, S.M.ASCE [email protected], Patrick J. Fox, Ph.D., F.ASCE [email protected], and Ning Lu, Ph.D., F.ASCE [email protected]Author Affiliations
Publication: PanAm Unsaturated Soils 2017
Abstract
This paper presents a new numerical analysis method for one-dimensional, large strain compression of a single undrained, unsaturated soil element. The method builds on the framework of the consolidation model, CS2, which has been used successfully for many consolidation-related engineering applications. In this work, soil properties and relationships are used to model undrained compression from first principles. A numerical study is performed to investigate the effect of increasing applied total stress on element compression and corresponding soil properties. Results indicate that volume change is non-linear and, as the element approaches saturation, an increase in total stress yields a nearly equivalent increase in pore air pressure. Ultimately, this work will serve as a point of departure for the development of a new large strain consolidation model for unsaturated soil.
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© 2018 American Society of Civil Engineers.
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Published online: Jun 20, 2018
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Graduate Research Assistant, Dept. of Structural Engineering, Univ. of California, San Diego, La Jolla, CA 92093-0085. E-mail: [email protected]
P.E.
Shaw Professor and Head, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., University Park, PA 16802. E-mail: [email protected]
Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401. E-mail: [email protected]
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