Constitutive Modeling of Unsaturated Soils using Results from Suction Controlled Odometer Tests


Suction-controlled triaxial tests have been widely used to characterize unsaturated soil behavior for the constitutive modelling purpose. This type of tests requires sophisticated and therefore expensive equipment, is time-consuming and unreliable, and cannot be justified for routine engineering projects. In comparison, suction-controlled odometer tests require much simpler testing equipment. Due to the smaller specimen thickness, the time needed for dissipating excess pore water pressure is about 10 times less. However, the stress path of a soil during odometer test is not clear since the lateral stress is unknown. At present, there is no method available to analyze the odometer test results for constitutive modeling purpose. This paper presents an analytical method to use results from odometer tests for constitutive modeling purpose. An example is used to demonstrate the effectiveness and simplicity of the proposed method from which some conclusions are made.

Meeting Name

International Foundations Congress and Equipment Expo 2015, IFCEE 2015 (2015: Mar. 17-21, San Antonio, TX)


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Equipment; Analytical method; Excess pore water pressure; Expensive equipments; Lateral stress; Routine engineerings; Specimen thickness; Testing equipment; Unsaturated soil; Soils

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


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© 2015 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Mar 2015