Estimating poromechanical properties using a nonlinear poroelastic model

Kuo Chin Hsu, Shih Jung Wang, Chein Lee Wang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A physics-based method is proposed for simultaneously obtaining the hydraulic conductivity, Young's modulus, and Poisson's ratio of soil materials using the uniaxial consolidation test. A nonlinear poroelastic model is presented, and the settlement data from consolidation tests are fitted to the model at each load step with the least-squares error method to inverse the parameters. The model results perfectly fit the experimental data in the initial load steps but slightly deviate from the data in later load steps as a result of secondary settlement and a largely increased Young's modulus. The inversed parameters are compared with those calculated from the uniaxial consolidation test and those found in the literature. The comparison results demonstrate that the inversed parameters are reasonable. The proposed method provides both an estimation of parameters and the parameter-change information during a consolidation test. The method is simple, efficient, and versatile for obtaining poromechanical parameters with the uniaxial consolidation test. These parameters are useful for groundwater, geomechanical, and mining engineering.

Original languageEnglish
Pages (from-to)1396-1401
Number of pages6
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume139
Issue number8
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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