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Determination of the Overconsolidation Ratio using the Piezocone Penetration Test  

Lee, Ki-Se (Daejeon University, Dept. of Civil Engineering)
Shin, Won-Tae (Korean Geo-Consultants Co., Ltd.)
Goo, Nam-Shil (KLC Daejeon and Choong Chung District)
Kim, Hak-Joon (Daejeon University, Dept. of Geotechnical Design Engineering)
Publication Information
The Journal of Engineering Geology / v.17, no.3, 2007 , pp. 351-358 More about this Journal
Abstract
Using the results of the Piezocone Penetration Test(PCPT) which were executed at the Yangsan-Mulgum site, the applicability of the interpretation methods far estimating the OCR(Overconsolidation Ratio) of soft clay was evaluated. At the same time, the results from the laboratory tests using the total of 172 undisturbed soft clay samples taken from the 44 bore holes of the Yangsan-Mulgum site were used to compare the OCR values obtained from the consolidation test with those from the PCPT. The relationship between the predicted overconsolidation ratio($OCR_p$) using the PCPT and the measured overconsolidation ratio($OCR_c$) from the laboratory consolidation tests are investigated and presented in this study. The $OCR_p$ by using the Powell et al.'s method for non-fissured clay from the results of the PCPT shows the best relationship with the $OCR_c$ obtained from the laboratory consolidation test.
Keywords
piezocone penetration test(PCPT); overconsolidation ratio(OCR); oedometer yest; piezocone parameter; consolidation;
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