The Effect of Nail Inclination of soil Nailing Structure of vertically Faced Wall

벽체가 수직인 쏘일네일링 구조물의 네일 경사각 영향

  • Han, Sang-Su (Dong-A Geological Engineering, Co. Ltd.) ;
  • Baek, Yong (Underground Structure Research Division, Korea Institute of Construction Technology) ;
  • Kwon, O-Il (Underground Structure Research Division, Korea Institute of Construction Technology) ;
  • Kim, Young-Nam (Dongmyeong Engineering Co. Ltd.) ;
  • Chae, Young-Su (Dept. of Civil Engineering, The University of Suwon) ;
  • Lee, Kang-Il (Dept. of Civil Engineering, Daejin University)
  • 한상수 (㈜동아지질 설계지원팀) ;
  • 백용 (한국건설기술연구원 지하구조물연구실) ;
  • 권오일 (한국건설기술연구원 지하구조물연구실) ;
  • 김영남 (㈜동명기술공단종합건축사사무소 토질부) ;
  • 채영수 (수원대학교 토목공학과) ;
  • 이강일 (대진대학교 건설시스템공학과)
  • Published : 2008.09.30

Abstract

For the soil nailing, recently, its application is expanded, but there is no officially approved method to design it yet. Furthermore, there are a great number of design valuables in soil nailing, it is also used without clear data under the situation that uncompleted detailed research on the sensibility between design variables. Especially, there has no deal with the installation angle of the nail - the major contents in this study. Therefore, this study based on the theoretical estimation analyzed safety rate about the angle of the nail, unit weight, adhesive force, internal friction angle and tensile farce worked on nail in the case of the rear of pond side is both horizontal and perpendicular. As a result, it could be verified that the safety rate increased on every cases in the situation of the nail installation angle was in upward direction than in downward direction.

쏘일네일링은 최근 들어 그 적용성이 확대되고 있으나 아직까지 공인된 설계방법이 없다. 또한 쏘일네일링은 설계변수가 많고 설계변수 상호간의 민감도에 대한 연구가 되지 않은 상황에서 명확한 근거 없이 사용되고 있다. 특히, 본 연구의 주요 과제인 네일의 설치각도에 대한 민감성은 다루어지지 않고 있다. 따라서 본 연구는 이론적 계산식을 바탕으로 파괴면에 대한 네일의 각도와 벽체의 높이, 단위중량, 점착력, 내부 마찰각, 네일에 작용하는 인장력 등을 고려하여 안전율을 분석하였다. 그 결과, 배면지반이 수평이고 수직벽체인 경우 네일의 설치 각도는 하향보다 상향이 모두 안전율이 증가하는 것을 확인할 수 있었다.

Keywords

References

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