›› 2010, Vol. 31 ›› Issue (5): 1475-1480.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of improvement of secondary consolidation settlement calculation method

FENG Zhi-gang1, ZHU Jun-gao2, FENG Hao-jie1   

  1. 1. Guangxi Electric Power Industry Investigation Design and Research Institute, Nanning 530023, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China
  • Received:2008-10-22 Online:2010-05-10 Published:2010-05-24

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Abstract:

Soft clay has characteristics such as high moisture content and large void ratio. After excess pore water stress dissipation under loading, secondary consolidation settlement is produced. A lot of geotechnical engineering problems are caused by it and it is necessary to calculate and predict the settlement. The general secondary consolidation settlement calculation method has a shortage that when load duration is infinite, settlement infinite. An improved formula is presented aiming at the shortcoming. Brief review is given on Yin & Graham 1-D elastic viscoplastic model and improvement is given on it. A method to determine starting and finishing time of secondary consolidation settlement of soft foundation is put forward combined with the improved elastic viscoplastic model. The improved formula is feasible and more reasonable and can be used to calculate secondary consolidation settlement of foundation in actual engineering

Key words: secondary consolidation settlement, calculation method, elastic viscoplastic model, improvement

CLC Number: 

  • TU 443
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