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A Study on the Structural Stability of Prefabricated Strut for Ground Excavation Construction

지반굴착용 조립식 버팀보의 구조 안정성에 관한 연구

  • 이기선 ((주)평화엔지니어링 교량기술부) ;
  • 김두환 (서울과학기술대학교 건설시스템공학과) ;
  • 송관권 ((주)진온이엔시.서울과학기술대학교) ;
  • 김성필 ((주)한승엔지니어링.서울과학기술대학교) ;
  • 김정훈 ((주)에스텍컨설팅그룹 기업부설연구소)
  • Received : 2018.03.05
  • Accepted : 2018.04.30
  • Published : 2018.05.01

Abstract

In study, Structural stability was considered when applying the high strength strut method with improved general strut method. considered whether there is sufficient stiffness to so as not buckling to the maximum hypothetical earth pressure. also structure stability of the strut component was reviewed. The high strength strut method is a technique used in place of the general strut method. high strength prefabricated Strut method is a technique that has bolt holes drilled in the upper flange at regular intervals. As a result of the buckling analysis, it was considered that the safety factor increased by about 5 %. also Since the stress generated is below the allowable stress, it is judged that structural stability of the strut is ensured. In particular, the safety factor of axial compressive stress increases about 16 % with use of high strength steel when applying the high strength prefabricated strut method. the high strength strut method is construction method may shorten the construction period and there is no expense to purchase additional materials.

본 연구에서는 일반 버팀보 공법을 개선한 조립식 버팀보 공법을 적용할 때 구조안정성에 대하여 검토하였다. 굴착단계별 가상의 최대 발생 토압력에 대해 좌굴되지 않도록 충분한 강성을 가지는에 대한 안정성검토를 실시하였다. 고강도 조립식 버팀보 공법은 상부플랜지에 일정한 간격으로 볼트 구멍이 천공되어 있는 공법이다. 구조물의 좌굴해석 결과 안전율은 약 5%정도 증가하였고, 발생응력이 허용응력보다 낮기 때문에 버팀보의 구조 안정성은 확보된 것으로 판단된다. 특히 고강도 버팀보 공법을 적용 시 축방향 압축응력은 약 16% 증가한다. 고강도 버팀보 공법은 공사기간을 단축할 수 있으며 추가 부재를 구매할 필요가 없어 경제적이다.

Keywords

References

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