TY - JOUR
T1 - Numerical Study of Undrained 1D Compression for Unsaturated Soil
AU - Hall, Kaitlin M.
AU - Fox, Patrick J.
AU - Lu, Ning
N1 - Funding Information:
Financial support for this research was provided by the U.S. National Science Foundation (NSF), Arlington, VA, under Grant No. CMMI-1622781. Additionally, the first author was supported by the Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program. This support is gratefully acknowledged. The opinions expressed in this paper are solely those of the authors and are not necessarily consistent with the policies or opinions of the NSF or DoD.
Publisher Copyright:
© 2018 American Society of Civil Engineers (ASCE). All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85049803262&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049803262&partnerID=8YFLogxK
U2 - 10.1061/9780784481707.031
DO - 10.1061/9780784481707.031
M3 - Conference article
AN - SCOPUS:85049803262
VL - 2017-November
SP - 313
EP - 322
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
SN - 0895-0563
IS - GSP 303
T2 - 2nd Pan-American Conference on Unsaturated Soils: Swell-Shrink and Tropical Soils, PanAm-UNSAT 2017
Y2 - 12 November 2017 through 15 November 2017
ER -