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A Sensitivity Analysis for the Geotechnical Parameters Estimation of a Ground around a Granular Compaction Pile

쇄석다짐말뚝 주변지반의 지반정수산정을 위한 민감도 분석

Han, Yushik;Choi, Yongkyu
한유식;최용규

  • Received : 2015.05.12
  • Accepted : 2015.08.27
  • Published : 2015.12.31

Abstract

The GCP (Granular Compaction Pile) for the improvement objective of soft ground has been frequently studied. However, these studies were the results deduced on the basis of the numerical analysis and the laboratory model tests, and there was no study method to apply the effects of the bulging failure of a flexible pile. In this study, the sensitivity of the load-settlement curves of the uniform and the tapered GCP dependant on the geotechnical parameters estimated from N value of standard penetration test (SPT) was analyzed. It was estimated reasonably that, in the very soft clay soil (N=3 or less), elastic modulus was 700~2000 kPa and Poisson's ratio was 0.40~0.48.

Keywords

GCP (Granular Compaction Pile);Numerical analysis;Geotechnical parameters;Bulging failure;SPT (Standard Penetration Test);The sensitivity;Very soft clay

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