4.7 Article

End-of-primary consolidation parameters using inflection point method

期刊

GEOTECHNIQUE
卷 71, 期 7, 页码 645-654

出版社

ICE PUBLISHING
DOI: 10.1680/jgeot.18.P.124

关键词

clays; compressibility; consolidation; laboratory tests; pore pressures

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This study introduces a faster and more complete consolidation testing procedure using the inflection point method, which can obtain the void ratio-consolidation curve and coefficient of consolidation of soils in a shorter time. The validity of this method is verified through tests on different soil samples.
This note describes a faster and complete consolidation testing procedure using the inflection point method so as to obtain the void ratio-consolidation curve at the end-of-primary consolidation and the coefficient of consolidation. The testing procedure is similar to the conventional incremental load consolidation test, with the only difference being that the subsequent loading is applied once the degree of consolidation of U = 70.15% is reached. The time and settlement corresponding to U = 70.15% is obtained using the inflection point method, from which the end-of-primary consolidation and the coefficient of consolidation are evaluated. The validity of the proposed procedure is verified by performing tests on four reconstituted and three undisturbed soil samples. By adopting the proposed procedure, complete consolidation tests can be completed within 2.5 to 9 h depending on the coefficient of consolidation of the soils.

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