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Sample Disturbance due to Sampling Techniques and Comparison of Consolidation Parameters Between Testing Methods on Pusan Clays  

곽정민 (동아대학교 공과대학 토목공학과)
정성교 (동아대학교 공과대학 토목공학과)
백승훈 (㈜가야ENG)
이영남 (현대건설㈜ 건설기술연구소)
조기영 (부산시 도시개발공사)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.4, 2003 , pp. 43-53 More about this Journal
Abstract
To get improved soil parameters in the laboratory tests, the effects of sample disturbance should be excluded as much as possible. A collaborative research between Dong-A University and PHRI (Japan) was conducted to investigate the effects of sample disturbance due to sampling techniques and samplers on Pusan clays. The results of unconfined compression and consolidation tests performed on the clay samples taken by them have been compared in terms of soil parameters and sample disturbance. As the result of the study, it was found that when the Korean sampler was used with a different technique of cleaning the borehole bottom and removing slime before inserting and penetrating the sampler tube, similar to the one commonly used in Japanese practice, the quality of samples could be greatly improved. Furthermore, the CRS test with the rate of 0.02%/min yielded larger values of consolidation parameters and better degree of sample disturbance than those of oedometer test, due to the difference in testing method.
Keywords
Laboratory test; Pusan clay; Sample disturbance; Sampling techniques;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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