FUNCTIONAL MODELS TO PREDICT AIR PERMEABILITY COEFFICIENT FROM WATER CHARACTERISTIC CURVE OF UNSATURATED SOILS

• KAMIYA Kohji

  岐阜大学 工学部社会基盤工学科

• INOUE Mitsuhiro

  鳥取大学 乾燥地研究センター

Bibliographic Information

Other Title

• 水分特性曲線を用いて不飽和土の透気係数と飽和度の関係を推定する関数モデルの考察

Abstract

For predicting the air permeability coefficient from the water characteristic curve of unsaturated sandy and silty soils, the applicability of the air permeability model based on the Burdine theory and Mualem theory for expressing the relationship between the air permeability coefficient and the degree of water saturation is examined. As a result, the model based on the Burdine theory is more applicable during the drying process. However, the optimized parameter ξ-values for pore tortuosity in the models are varied for each soil and related the shape of the water characteristic curve. And then, it is recognized that the both models are good agreement with each other and fitted to the measured air permeability coefficient.

Journal

• Doboku Gakkai Ronbunshuu C

  Doboku Gakkai Ronbunshuu C 64 (3), 650-661, 2008

  Japan Society of Civil Engineers

Keywords

• air permeability coefficient
• water characteristic curve
• tortuosity factor
• unsaturated soil

Details

• CRID: 1390001205253636864
• NII Article ID: 130004468299
• DOI: 10.2208/jscejc.64.650
• ISSN: 1880604X
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed