Applicability of CPT-based methods in predicting toe bearing capacities of driven piles in sand

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• 作者：Le Chi Hung ; Tien Dung Nguyen ; Ju-Hyung Lee ; Sung-Ryul Kim
• 关键词：Cone penetration test ; Driven piles ; Pile driving analyzer ; Statistical analysis ; Toe bearing capacity
• 刊名：Acta Geotechnica
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：11
• 期：2
• 页码：359-372
• 全文大小：2,624 KB
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• 作者单位：Le Chi Hung (1)
  Tien Dung Nguyen (1)
  Ju-Hyung Lee (2)
  Sung-Ryul Kim (1)
  
  1. Civil Engineering Department, Dong-A University, 840 Hadan2-dong, Saha-gu, Pusan, 604-714, Korea
  2. Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Korea
  
• 刊物类别：Engineering
• 刊物主题：Continuum Mechanics and Mechanics of Materials
  Geotechnical Engineering
  Soil Science and Conservation
  Granular Media
  Structural Mechanics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1861-1133

文摘

This paper presents a study on applicability of predicting toe bearing capacities from cone penetration test (CPT) for PHC (pretensioned spun high-strength concrete) driven piles into deep sandy deposits in the Nakdong River deltaic area west of Busan City in South Korea. Using toe bearing capacities obtained from pile driving analyzer (PDA) tests as reference values, which were reliably calibrated by on-site O-cell tests, the applicability of the CPT-based methods was evaluated using a statistical rank index (RI). A total of 82 piezocone penetration test soundings and 190 PDA test piles were used for reliability analysis in this study. Three correction steps were applied to obtain reliable PDA and CPT data sets before ranking is carried out. The RI index is combined from four criteria: (1) the best-fit line, (2) the arithmetic mean and standard deviation, (3) the cumulative probabilities, and (4) the log-normal and histogram distributions. Based on these criteria the performance of some SPT-based methods in the literature is evaluated.