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Correlation Analysis between DCPT Value and SPT Value

동적콘관입시험값과 표준관입시험값의 상관성 분석

  • Lee, Bongjik (Department of Civil Engineering, Korea National University of Transportation) ;
  • Lee, Jongkyu (Technical Firm DAWON Co., LTD.)
  • Received : 2014.04.23
  • Accepted : 2014.06.13
  • Published : 2014.08.01

Abstract

In-situ penetration tests have been widely used in geotechnical engineering for site investigation in support of analysis and design. Standard Penetration Test (SPT) and Dynamic Cone Penetration Test (DCPT) are typical dynamic sounding. DCPT was originally developed as an alternative for evaluating the properties of subgrade soils. The main advantages of DCPT are that it is fast, inexpensive, and it is particularly useful in delineating areas of weak soils overlying stronger strata and in quickly assessing the variability of the soil conditions. But lack of standardization is main reason that this test method has not been advanced more in recent years. In this study, it is clarified the correlation with the SPT blow count, N from DCPT data using big DCP eqipment. Regression analysis and correlationship analysis were conducted with the data from relationship between SPT and DCPT. The analysis results showed that the convert fact are in the range of 1.12~1.31 with variation with soil property.

Acknowledgement

Supported by : 한국교통대학교

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