Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Applicability of the Tensile Test Performance Evaluation Baseline for Ground Anchors

지반앵커에 대한 인장시험 성능평가 기준선의 적용성 고찰

  • Kim, Dae Gun (Dept. of Civil and Environmental Engrg., Korea Maritime and Ocean Univ.) ;
  • Park, Tae Kwang (Dept. of Civil and Environmental Engrg., Korea Maritime and Ocean Univ.) ;
  • Park, Lee Keun (Geotechnical Research & Development Co.) ;
  • Kim, Tae-Hyung (Dept. of Civil Engrg., Korea Maritime and Ocean Univ.)
  • 김대근 (한국해양대학교 토목환경공학과) ;
  • 박태광 (한국해양대학교 토목환경공학과) ;
  • 박이근 ((주)지오알앤디) ;
  • 김태형 (한국해양대학교 건설공학전공)
  • Received : 2022.07.14
  • Accepted : 2022.08.04
  • Published : 2022.08.31
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Abstract

Currently, tension ground anchors are divided into temporary and permanent based on their purpose and period of use, and their performance evaluations are presented separately. Therefore, applying the current performance evaluation's upper and lower limits to practice seems reasonable. However, because compression ground anchors have been mainly used as permanent, performance evaluation corresponding to permanent is conducted without distinction between temporary and permanent. This evaluation is a strict standard for ground anchors used as temporary, including the removal type. Because of examining the existing performance evaluation for the compression ground anchor, the lower limit can be applied without distinguishing between the temporary and permanent. However, the upper limit should be presented separately for the temporary and permanent. In applying the upper limit, it is necessary to adjust the upper limit of the anchor considering the anchored ground condition (rock or soil), the period of use, and particularly whether the load-displacement curve maintains the elastic state.

현재 인장형 지반앵커는 그 사용목적, 사용기간에 따라 가설과 영구로 구분하여 성능평가를 별도로 제시하고 있다. 현재의 성능평가 상한선과 하한선 기준을 실무에 적용하는 데 있어 타당한 것으로 보인다. 하지만, 압축형 지반앵커는 주로 영구로 사용되어 온 점으로 인해 가설과 영구의 구분 없이 영구에 해당하는 기준이 제시되어 있어 제거형과 같이 가설로 사용하는 지반앵커에 있어서는 엄격한 기준이 되고 있다. 기존 성능평가 기준선을 고찰해 본 결과, 하한 기준선은 가설과 영구 구분 없이 적용할 수 있는 것으로 판단되나 상한 기준선은 가설과 영구를 구분하여 제시하는 것이 바람직한 것으로 판단된다. 압축형 지반앵커에서 상한선 기준의 적용에 있어서 앵커의 정착지반상태(암반 또는 토사), 사용기간, 특히 하중-변위 곡선의 탄성상태 유지 여부 등을 고려하여 상한선을 조정할 필요성이 있다.

Keywords

References

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