›› 2011, Vol. 32 ›› Issue (S1): 397-0402.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of expansion model of expansive soil considering state water content and density

HUANG Bin1, 2, RAO Xi-bao1, 2, WANG Zhang-qiong3, TAN Fan1, 2   

  1. 1. Geotechnical Division, Yangtze River Scientific Research Institute, Wuhan 430010, China; 2. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Wuhan 430010, China; 3. Graduate School, China University of Geosciences, Wuhan 430074, China
  • Received:2010-12-27 Online:2011-05-15 Published:2011-05-16

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Abstract: The relationships between compactness, initial water content, cover load and expansion rate have been studied through expansion experiments at the state of K0 stress for Handan strong expansive soil. Then a constitutive model of expansive soil which considered the effects of these three factors is set up. The relationship between ultimate water content, compactness, initial water content and cover load is also set up. Finally, a constitutive equation for linear expansion coefficient of Handan strong expansive soil is proposed. It takes compactness, initial water content, cover load and ultimate water content as variables. With this constitutive equation, constitutive relation of any water content can be obtained. The experiments and expression of this model are relatively simple and of certain practical use. This model can provide theoretical basis and reference for design and construction.

Key words: expansive soil, expansion model, state water content, loaded expansion ratio

CLC Number: 

  • TU 431
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