Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Effect of Embedment Ratio and Loading Rate on Uplift Adhesion Factor of Concrete Driven Pile

근입비와 인발속도가 콘크리트 항타말뚝의 인발부착계수에 미치는 영향

  • 김종인 (인천대학교 일반대학원 토목환경시스템공학과) ;
  • 박정준 (인천대학교 일반대학원 토목환경시스템공학과) ;
  • 신은철 (인천대학교 공과대학 토목환경시스템공학과)
  • Published : 2005.08.01
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Abstract

Pile foundations are utilized when soil is so weak that shallow foundations are not suitable or point load is concentrated in small area. Such soil can be formed by the land reclamation works which have extensively been executed along the coastal line of southern and western parts of the Korean Peninsula. The working load at pile is sometimes subjected to not only compression load but also lateral load sad uplift forces. But in most of the practice design, uplift capacity of pile foundation is not considered and estimation of uplift capacity is presumed on the compression skin friction. This study was carried out to determine that the effect of embedment ratio and loading rate on uplift adhesion factor of concrete pile driven in clay. Based on the test results, the critical embedment ratio is about 9. Adhesion factor is constant under the critical embedment ratio, and decreasing over the critical embedment ratio. Also, adhesion factor is increased with the loading rate is increased.

Keywords

References

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