›› 2010, Vol. 31 ›› Issue (8): 2367-2372.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A novel coupling model for 1D finite-strain primary-secondary consolidation

DING Zhou-xiang1,YUAN Da-jun1,ZHU He-hua2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2008-12-08 Online:2010-08-10 Published:2010-08-30

Abstract:

Aimed at the weakness of ignorance of secondary consolidation in traditional 1D finite-strain consolidation theory, a novel coupling model for 1D finite-strain primary-secondary consolidation was presented, according to both the finite deformation theory in continuum mechanics and the consolidation theory in soil mechanics. Using excess pore water pressure as governing variable, the presented model could be formulated respectively with Eulerian, Lagrangian, and solid volume coordinates. Such factors as the change of unit weight of soil, solid phase velocity, settlement rate of ground surface, change of ground water table, change of surcharge and secondary consolidation, are explicitly expressed in the presented coupling model. Under different conditions, the new model could be reduced correspondingly to related models by previous authors. When taking no account of the secondary consolidation effects, the presented model is equivalent to that by Gibson et al. (1967). From viewpoint of engineering convenience, the simplified form of the presented model considering secondary consolidation and the change of surcharge keeps more easily to be solved, and provides a practical model for further reference.

Key words: finite-strain, primary consolidation, secondary consolidation, Gibson’s finite-strain consolidation theory, governing equations

CLC Number: 

  • TU 033
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