›› 2005, Vol. 26 ›› Issue (9): 1349-1355.

• Fundamental Theroy and Experimental Research •     Next Articles

A pore pressure equation for anisotropic clay and its application

GAO Yan-bin1,2, XU Chao1,2, TANG Jing1   

  1. 1. Key Laboratory of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2004-06-30 Online:2005-09-10 Published:2013-12-30

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Abstract: The effect of anisotropy on the pore pressure development for clay is investigated. A rotational yield surface is presented by introducing the Sekiguchi-Ohta stress ratio and Xin’s failure equation into the Modified Cam Model; and an anisotropic elastoplastic model is built. Based on this model, a new anisotropic pore pressure equation is presented, which can account for the pore pressure development induced by the rotation of Lode angle and principal stress. The equation is used to study the pore pressure development induced by the rotation of the Lode angle and stress axis direction under triaxial stress state. Finally, the pore pressure development in the plane strain anisotropic clay foundation under an strip load is analyzed by the equation. Results show that the pore pressure induced by the Lode angle rotation is small in the foundation. However, in the soil under the edge of load, pore pressure induced by the rotation of stress axis direction is significant, especially at a lower depth.

Key words: clay, anisotropy, pore pressure equation, constitutive model

CLC Number: 

  • TU 452
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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