›› 2005, Vol. 26 ›› Issue (8): 1298-1302.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A CT-timely experimental study on meso-scopic structural damage development of frozen soil under triaxial shearing

SUN Xing-liang1,2, WANG Ren2, HU Ming-jian2   

  1. 1.School of Civil Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043, China; 2.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2004-09-20 Online:2005-08-10 Published:2013-12-26

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Abstract: Meso-scopic structural damage development during the triaxial shearing process of frozen soil was studied by computerized tomography (CT) technique. Analysis of CT-images and values during deformation shows that there is already a variety of initial structural damages, such as micro-holes, pipe-shaped holes and low-density regions before loading. The elastic damage only accounts for a very small scale in total damage, but viscoplastic damage for a great scale. There also exist the phenomena of structural strengthening and softening during triaxial shearing, similar to those during creep of frozen soil. The viscoplastic damage, which can not be determined by CT-values, behaves mainly in the forms of the changes of size and shape and unification of microscopic cavities, the slippages between soil particles and/or cemented ice particles.

Key words: frozen soil, triaxial shearing, structural damage, timely experiment by CT technique

CLC Number: 

  • P642.14
  • 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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