Geotechnics for Sustainable Infrastructure Development pp 1253-1258 | Cite as
Multi-Stepwise Strain-Rate Loading Consolidation Test to Evaluate Strain Rate Dependency
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To evaluate the long-term consolidation characteristics on the basis of the isotache concept, long-term consolidation test is required. However, it is very difficult to conduct long-term consolidation test in practice, because it takes a very long test period of three weeks or longer. In order to solve this problem, a multi-staged loading constant rate of strain (CRS) consolidation test in which strain rate is stepwisely varied was conducted to investigate both the compressibility and strain rate dependency using a same soil specimen. In the CRS consolidation test, preliminary consolidation (creep) at the overburden effective stress was introduced before loading in a constant rate of strain to avoid an effect of recompression under the overburden effective stress on the compression curve.
Keywordsstrain rate dependency isotache CRS consolidation test compression curve long-term consolidation
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This study was carried out as a part of the collaborative research among Hokkaido University, Port and Airport Research Institute, and Kansai Airports. The authors would like to thank Mr. Kiyoshige Katagi of Kansai Airports, Dr. Yoshiyuki Morikawa, and Dr. Takaaki Mizutani of Port and Airport Research Institute for their active discussions on this study.
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