Inverse analysis of soft grounds considering nonlinearity and anisotropy

Shin-ichi Nishimura, Tatsuro Nishiyama, Akira Murakami

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The inverse analysis method, used to accurately predict the two-dimensional deformation behavior of soft grounds, is discussed in this study. To ensure safety when constructing on a soft ground, in-situ observations are usually made. An inverse analysis is then effective for identifying the in-situ parameters of the ground and for predicting future deformation based on the parameters. The settlement, the lateral displacement, and the pore water pressure are measured during the construction of the structure. It is generally difficult to predict the lateral displacement. In this research, therefore, the cross anisotropy (transverse isotropy) of the ground is introduced to overcome the difficulty of predicting the lateral displacement. Furthermore, a simplified hyperbolic model is introduced to simulate the nonlinear shear behavior. The model is convenient for use with the inverse analysis, since it does not require many parameters. The measured pore water pressure is seldom used in the inverse analysis, because information on the pore water pressure is not required, from a mathematical standpoint, in order to identify the consolidation parameters. The effectiveness of applying the measured pore water pressure for the prediction of future consolidation behavior, is clarified in this study. As a result, the hyperbolic nonlinear model and the assumed anisotropy were found to be useful in predicting the future deformation behavior of clay. Furthermore, the pore water pressure measurement was proved to be effective for the predictions in this study.

Original languageEnglish
Pages (from-to)87-95
Number of pages9
JournalSoils and Foundations
Volume45
Issue number2
Publication statusPublished - Apr 2005

Fingerprint

inverse analysis
nonlinearity
porewater
Anisotropy
anisotropy
Water
Consolidation
consolidation
transverse isotropy
Information analysis
Pressure measurement
prediction
Clay
safety
clay
parameter

Keywords

  • Anisotropy
  • Consolidation
  • Inverse analysis
  • Nonlinear
  • Pore water pressure
  • Soft ground (IGC: D5/E2)

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

Cite this

Inverse analysis of soft grounds considering nonlinearity and anisotropy. / Nishimura, Shin-ichi; Nishiyama, Tatsuro; Murakami, Akira.

In: Soils and Foundations, Vol. 45, No. 2, 04.2005, p. 87-95.

Research output: Contribution to journalArticle

Nishimura, Shin-ichi ; Nishiyama, Tatsuro ; Murakami, Akira. / Inverse analysis of soft grounds considering nonlinearity and anisotropy. In: Soils and Foundations. 2005 ; Vol. 45, No. 2. pp. 87-95.
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