Consolidation behavior of ultra-soft slurry and 1-d consolidation model considering viscosity

Jun Tong, Noriyuki Yasufuku, Kiyoshi Omine

Research output: Contribution to journalConference articlepeer-review


The ultra-soft slurry exhibits significant, initially viscous and subsequently elasto-plastic consolidation behavior. In order to investigate the different consolidation response at the viscous stage (VS) and elasto-plastic stage (EPS), a series of element consolidation tests were carried out in the modified light-capped oedometer. Test results show that the consolidation coefficient and permeability at VS and EPS vary significantly, which would bring in non-negligible error to the consolidation prediction with the ordinary assumptions. A simplified 1-D consolidation model considering the significant behavior difference in the VS and EPS was developed. The suction pressure proposed by Hong (2007, 2010) was employed to identify the consecutive stages in the model. Then, the consolidation tests for ultra-soft clay under different loadings were conducted in the small-scale consolidometer and the test results are simulated with the proposed model. The model can describe the progressive consolidation well from the VS to EPS. It provides an easily-accessible and reasonable alternative for the prediction of the consolidation behavior for the ultra-soft slurry.

Original languageEnglish
Pages (from-to)595-604
Number of pages10
JournalGeotechnical Special Publication
Issue number232 GSP
Publication statusPublished - 2013
Event2nd International Conference on Geotechnical and Earthquake Engineering: Challenges and Recent Advances in Geotechnical and Seismic Research and Practices, IACGE 2013 - Chengdu, China
Duration: Oct 25 2013Oct 27 2013

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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