Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (10): 31-36.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Comparative Experimental Investigation into Effects of Organic Matter and Clayey Mineral on Rheological Properties of Soft Soil

Gu Ren-guo  Fang Ying-guang     

  1. 华南理工大学 亚热带建筑科学国家重点实验室, 广东 广州 510640
  • Received:2007-10-08 Revised:2008-03-10 Online:2008-10-25 Published:2008-10-25
  • Contact: 谷任国（1979-），男，博士，助理研究员，主要从事岩土及地下结构研究． E-mail:rggu@scut．edu．cn
  • About author:谷任国（1979-），男，博士，助理研究员，主要从事岩土及地下结构研究．
  • Supported by:

    中国博士后科学基金资助项目（20080430815）

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Abstract:

An improved direct shear creep apparatus was used to test the rheological properties of two soft soil samples respectively containing organic matter and bentonite with the same content in the same test conditions. The results show that （ 1 ） organic matter and bentonite are two important factors affecting the rheological properties of soft soil, especially the former; （2） the effects of organic matter and bentonite on the rheological properties of soft soil are due to the bound water adsorbed by montmorillonite on the soil particle surface; and （3） the firmly-bound water is the primary factor and the loosely-bound water is the secondary factor to induce the rheological properties. The test results help to reveal the emerging causes of soil rheology and to improve the existing calculation theories of rheology deformation of soft soil.

Key words: organic matter, clayey mineral, soft soil, bound water, rheological property