A framework to assess the controllability of wetting on unsaturated collapsible soils

C. Mihalache, Giuseppe Buscarnera*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper focuses on the process of wetting-induced compaction in unsaturated soils. While such forms of irreversible deformation are referred to as collapses, a mechanical interpretation based on concepts of material stability has not yet been provided. Here we use a critical state plasticity model and an expression of second-order energy input accounting for changes in fluid pressures and/or volume fractions. Soaking-induced compaction is then simulated and interpreted in light of the controllability theory. Our results suggest that wetting-compaction is not necessarily associated with the loss of uniqueness of the incremental response. Compaction is indeed predicted not to be controllable only in soils that undergo considerable plastic strains upon wetting. In these cases, plastic models wiThenhanced hydraulic hardening predict the possibility of a loss of control of the water injection process, according to which the applied stress is no longer sustainable because of the degradation of the mechanical properties.

Original languageEnglish (US)
Title of host publicationBifurcation and Degradation of Geomaterials in the New Millennium - Proceedings of the 10th International Workshop on Bifurcation and Degradation in Geomaterials
EditorsKam-Tim Chau, Jidong Zhao
PublisherSpringer Verlag
Pages311-316
Number of pages6
ISBN (Print)9783319135052
DOIs
StatePublished - Jan 1 2015
Event10th International Workshop on Bifurcation and Degradation in Geomaterials, IWBDG 2014 - Hong Kong, Hong Kong
Duration: May 28 2014May 30 2014

Publication series

NameSpringer Series in Geomechanics and Geoengineering
Volumenone
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Other

Other10th International Workshop on Bifurcation and Degradation in Geomaterials, IWBDG 2014
CountryHong Kong
CityHong Kong
Period5/28/145/30/14

    Fingerprint

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

Cite this

Mihalache, C., & Buscarnera, G. (2015). A framework to assess the controllability of wetting on unsaturated collapsible soils. In K-T. Chau, & J. Zhao (Eds.), Bifurcation and Degradation of Geomaterials in the New Millennium - Proceedings of the 10th International Workshop on Bifurcation and Degradation in Geomaterials (pp. 311-316). (Springer Series in Geomechanics and Geoengineering; Vol. none). Springer Verlag. https://doi.org/10.1007/978-3-319-13506-9_45