Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Consolidation Characteristics at the Constant Rate of Strain(CRS) Test

일정변형률(CRS) 시험에서의 압밀특성

  • Lee, Dal-Won (Dept. of Agricultural & Rural Engineering, Chungnam National University) ;
  • Kim, Si-Jung (Dept. of Agricultural & Rural Engineering, Chungnam National University)
  • 이달원 (충남대학교 지역환경토목학과) ;
  • 김시중 (충남대학교 지역환경토목학과)
  • Received : 2010.10.01
  • Accepted : 2010.12.13
  • Published : 2010.12.31
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Abstract

This study was carried out to investigate the consolidation characteristics of the remolded clay by the oedometer and the constant rate of strain(CRS) consolidation tests. As the rate of strain increases, the settlement rapidly decreased. As the ratio of the sand in the specimen increases, its effect on the rate of strain to the settlement was reduced. As the effective stress increased, the void ratio decreased, while the rate of strain increased, it did not show a clear variation. The reduction of the void ratio was shown to be less than the oedometer test. The coefficient of vertical consolidation with effective stress showed very large variation around preconsolidation stress, but the rate of strain did not provide significant effects. The rate of strain with effective stress gradually decreased at all tests and mixed ratio of sand. The rate of strain at the constant rate of strain tests showed smaller than in the oedometer test. The coefficient of consolidation at the constant rate of strain tests showed much more increase than in the oedometer test. The ratio of the vertical coefficient of consolidation by the odometer and the constant rate of strain tests showed a large difference according to various tests method and mixing ratio. Therefore, it is recommended that careful attention should be paid to designing the soft ground improvement.

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References

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