›› 2009, Vol. 30 ›› Issue (7): 1915-1919.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Exploration of substance bases and mechanism of soft soil rheology

GU Ren-guo 1, 2, FANG Ying-guang 1, 2   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China; 2. State Key Laboratory of Subtropical Architecture Science, Guangzhou 510641, China
  • Received:2008-08-29 Online:2009-07-10 Published:2011-03-10

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Abstract:

By using an improved direct shear creep apparatus, exploration of effects of adsorbed water on rheological characteristics of soft soil is performed; and rheological characteristics of two groups of dried clay samples with different contents of kaoline and bentonite, respectively, and one sand sample are tested under the same test conditions. The compasions between current test results and data obtained from recently creep tests show that the adsorbed water is an important factor on rheological behavior of soil; the viscosity coefficient of dried clay is higher than that of wet clay, which compositions is the same as the dried clay; and the viscosity coefficient of sand is also higher than that of the wet clays; that is, the rheological strain resistance of the dried clays and sand is relatively greater than that of the wet clays; and the rheological phenomena of the formers are less obvious than that of the latters. Based on the data obtained from laboratory expriments, the substance bases of rheological characteristics of soft soil are explored. And the definition of “rheology substances” is proposed. The analyses of test results indicate “rheology substances” are responsible for rheological characteristics of soft soil and are the primary substance bases of soft soil rheology. The physical description of rheological mechanism of soft soil is presented, which is corresponding to the mechanical properties of “rheology substances”.

Key words: soft soil, rheology tests, rheology substance, rheological mechanism

CLC Number: 

  • TU 411.99
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