›› 2010, Vol. 31 ›› Issue (5): 1452-1456.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effects of permeability coefficients on consolidation of soft clay under by vacuum preloading

DONG Zhi-liang 1, CHEN Ping-shan 1, MO Hai-hong 2, 3, ZHANG Gong-xin1   

  1. 1. Engineering Research Institute Co., Ltd. of CCCC Fourth Harbour Engineering Co., Ltd., Guangzhou 510230, China; 2. School of Civil Engineering and Traffic & Communications, South China University of Technology, Guangzhou 510240, China; 3. State Key Laboratory of Subtropic Architecture Science, South China University of Technology, Guangzhou 510240, China
  • Received:2008-10-10 Online:2010-05-10 Published:2010-05-24

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Abstract:

Considering the influence of preconsolidation pressure on permeability coefficients under normal consolidated state, the 3-D FEM numerical simulation of single drain was executed for vacuum preloading with software ABAQUS, which took the relations between permeability coefficients with consolidation stress into account. The results show that when the permeability varied with consolidation stress, the surface settlement magnitude is smaller and the course of consolidation is slower, which resulted in the time needed to finish consolidation is longer. Meanwhile, the research also shows that more the preconsolidation pressure, smaller the surface settlement is, and the time to the same consolidation degree is longer.

Key words: vacuum preloading, permeability coefficients, normal consolidation, preconsolidation pressure, consolidation stress

CLC Number: 

  • TU 472
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