Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Horizontal Bearing Characteristics of Micropiles with the Length Ratio and Installation Angle of Pile

파일길이비와 파일설치각도에 따른 마이크로파일 수평지지특성

  • 오정배 ((주)천일 지반터널사업부) ;
  • 황태현 (건국대 공과대학 토목공학과) ;
  • 허인구 (지앤에스건설(주)) ;
  • 신종호 (건국대 공과대학 토목공학과) ;
  • 권오엽 (건국대 공과대학 토목공학과)
  • Received : 2015.03.07
  • Accepted : 2015.06.15
  • Published : 2015.06.30
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Abstract

Micropile was mainly used as one of underpinnig methods, and recently has been used for the various purposes such as foundation for new structure or slope stability etc. However, despite of the increase of the usage of micropile, studies about the horizontal bearing characteristic of micropile are insufficient. Thus the model test has been conducted to investigate the horizontal bearing characteristics of micropile with the length ratio and installation angle of pile. Consequently, micropiles at the installation angle of $+30^{\circ}$ and $-30^{\circ}$ effectively increase the horizontal bearing capacity, respectively for L/d ${\leq}25$ and L/d > 50.

언더피닝 공법으로 주로 활용된 마이크로파일은 신설 구조물지지와 사면안정 등 활용목적에 따라 현장에 많이 적용되고 있다. 그러나 이와 같이 활용됨에도 불구하고, 마이크로파일의 수평지지특성에 관한 연구는 미흡한 실정이다. 이에 본 연구에서는 파일설치조건에 따라 달라지는 마이크로파일의 수평지지특성을 알아보기 위해 모형시험을 수행하였다. 시험결과, L/d ${\leq}20$의 경우에는 $\theta$ = $+30^{\circ}$, L/d ${\geq}60$인 경우 $\theta$ = $-30^{\circ}$인 마이크로파일의 수평지지력을 효과적으로 증가시키는 것으로 나타났다.

Keywords

References

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