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Article
Comparison of Testing Techniques and Models for Establishing the SWCC of Riverbank Soils
Engineering Geology (2010)
  • Soonkie Nam, Georgia Southern University
  • Marte Gutierrez, Colorado School of Mines
  • Panayiotis Diplas, Lehigh University
  • John Petrie, Washington State University
  • Alexandria Wayllace, Colorado School of Mines
  • Ning Lu, Colorado School of Mines
  • Juan Jorge Munoz, Ecole National des Ponts et Chausees
Abstract
The soil water characteristic curve (SWCC), also known as soil water retention curve (SWRC), describes the relationship between water content and soil suction in unsaturated soils. Water content and suction affect the permeability, shear strength, volume change and deformability of unsaturated soils. This paper presents results of the laboratory determination of the SWCC for soil samples obtained from the riverbank of the Lower Roanoke River in North Carolina. Six different testing methods were used to establish the SWCC including the filter paper, dewpoint potentiameter, vapor equilibrium, pressure plate, Tempe cell and osmotic methods. It is concluded that each suction measurement technique provides different measurable ranges of suction values, and the combined results from the different tests provide continuous SWCCs. Three widely available models were also shown to adequately fit the experimental SWCC data, particularly for matric suction values under 1500 kPa. These results will be valuable to practitioners in deciding which methods to use to establish the SWCC, and which empirical relationship to use for modeling the SWCC of riverbank soils.
Keywords
  • Soil suction,
  • Soil water characteristic curve,
  • Unsaturated soils,
  • Riverbank,
  • Laboratory investigation,
  • Experimental techniques
Publication Date
January 10, 2010
DOI
10.1016/j.enggeo.2009.09.003
Citation Information
Soonkie Nam, Marte Gutierrez, Panayiotis Diplas, John Petrie, et al.. "Comparison of Testing Techniques and Models for Establishing the SWCC of Riverbank Soils" Engineering Geology Vol. 110 Iss. 1-2 (2010) p. 1 - 10 ISSN: 0013-7952
Available at: http://works.bepress.com/soonkie-nam/6/