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2014 Vol.30, Issue 1
Pullout Capacity of Screw Anchor Piles Using Field Pull-out Tests

현장인발시험을 통한 Screw Anchor Pile의 인발저항특성

Chung-Sik Yoo1*
,
Dae-Hyun Kim2
유 충식1*
,
김 대현2
1Prof. Dept. of Civil Engrg., Sungkyunkwan Univ.
2Former Graduate Student. Dept. of Mega Buildings and Bridges, Sungkyunkwan Univ.
1성균관대학교 건축토목공학부 교수
2전 성균관대학교 초고층장대교량학과 석사과정
*교신저자. *Corresponding Author. 
31 January 2014. pp. 5-16
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Abstract

This paper presents the results of an investigation into the pullout characteristics of screw anchor pile using field pullout tests. A series of field pullout tests were performed on screw anchor piles with different geometric characteristics such as shaft and screw diameters. The results indicated that screw anchor piles exhibited significantly higher pullout capacities compared with the same diameter piles without screw. Also observed is that the set-up effect and the grouting significantly increase pullout capacities, although the magnitude of the increase depends on the ground condition. In addition the applicability of prediction methods for helical pile pullout capacity to screw anchor piles was also examined. The results are presented in such a way that the pullout characteristics of screw anchor piles with different installation conditions can be identified. Practical implications of the findings are discussed.

Keywords
Screw anchor pile
Pullout capacity
Field pullout test
Set-up
Grouting

본 논문에서는 현장인발재하시험을 통한 스크류 앵커 파일의 인발 저항 특성에 관한 연구내용을 제시하였다. 현장시험에서는 동일한 피치를 가지나 샤프트나 스크류 직경이 다른 스크류 앵커 파일에 대해 다양한 시공조건을 도출하고 이에 대한 시험을 수행하였다. 실험결과 스크류 앵커 파일은 스크류가 없는 파일에 비해 현저히 큰 인발저항력을 발휘하는 것으로 검토되었으며 시간경과 효과와 그라우팅 여부에 따른 검토 결과 일반 파일과 유사하게 시간경과에 따라 인발저항력이 증가하는 셋업효과와 그라우팅시 인발저항력 상승효과를 기대할 수 있는 것으로 분석되었다. 이와 아울러 기존의 헬리컬 파일의 인발저항력 산정식을 스크류 앵커 파일의 인발저항력 평가에 있어서의 적용성을 검토하였으며 현장인발재하 시험결과를 다양한 측면에서의 상관관계를 파악할 수 있도록 제시하고 연구결과의 실무적 관점에서의 검토 내용을 기술하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 30
  • No :1
  • Pages :5-16
  • Received Date : 2012-12-27
  • Revised Date : 2013-08-07
  • Accepted Date : 2014-01-13
  • DOI :https://doi.org/10.7843/kgs.2014.30.1.5
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