›› 2008, Vol. 29 ›› Issue (8): 2057-2062.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on secondary consolidation of structural marine clays

SHAO Guang-hui1, 2, LIU Song-yu1   

  1. 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210093, China; 2. College Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2007-01-15 Online:2008-08-11 Published:2013-08-02

Abstract: The present calculating methods of secondary consolidation of soils do not consider the influence of structure, but most of the natural sediment soils behave the structural characteristics. The tests of marine clay performed by the authors show that secondary consolidation of structural clay relates to load not only in overconsolidation state but also in the process of structure destroying. The secondary consolidation coefficient rapidly increases with consolidation pressure when consolidation pressure is lower than the preconsolidation pressure, and slowly increases when pressure is between the preconsolidation pressure and the structure full yield stress. If the consolidation pressure is higher than the structure full yield stress, the secondary consolidation coefficient would not vary with consolidation pressure. Whether the secondary consolidation coefficient is varied with load should not be judged by preconsolidation pressure, but it should be the structure full yield stress. For marine clay, the varying process of secondary consolidation coefficient can be considered as three phases, i.e. overconsolidation, structure destroy and normal consolidation. A new calculating method is developed, which can reflect the structure behavior of soils.

Key words: secondary consolidation, structure, marine clay

CLC Number: 

  • TU 411
  • 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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