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2026 Vol.42, Issue 2 Preview Page
Analysis of Load-resistance Factors for Load and Distributive Temporary Anchors According to Excavation Depth

굴착깊이에 따른 하중분산형 가설앵커의 하중-저항계수 분석

Jong-Min Park1
,
Young-Min Kim2
,
Kang-Il Lee3*
박 종민1
,
김 영민2
,
이 강일3*
1Member, Graduate Student, Dept. of Civil Engineering, Daejin Univ.
2Member, Ph.D Student, Dept. of Smart City and Construction Convergence Engineering, Daejin Univ.
3Member, Prof., Department of Civil and Environmental Engineering, Daejin Univ.
1정회원, 대진대학교 토목공학과 석사과정
2정회원, 대진대학교 스마트시티건설융합공학과 박사과정
3정회원, 대진대학교 스마트건설환경공학과 교수
*Corresponding Author
30 April 2026. pp. 21-29
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Abstract

This study developed a load and resistance factor design framework for load-distributive temporary anchors by enhancing internal stability check items and addressing geotechnical uncertainties using domestic SPT N-value data. Resistance factors were calibrated to meet a target reliability index of 3.1 across varying excavation depths (10–30 m). The analysis yielded Φi values ranging from 0.07 to 1.00, showing a consistent increase with excavation depth across all limit states. Regression analysis of the resistance factor ratio (γ/Φ) against excavation depth yielded determination coefficients (R2) of 0.30 to 0.81. In all categories, the ratio exhibited a clear inverse relationship, decreasing sharply as excavation depth increased, thereby quantifying the sensitivity of design factors to the scale of excavation.

Keywords
Load and resistance factor design
Load-distributive Temporary Anchor
Internal stability
Resistance Factor

본 연구에서는 하중분산형 가설앵커의 구조적 특성을 반영하여 기존 내적안정 검토항목을 보완하고 국내 사질토 지반의 표준관입시험(SPT) N값 데이터를 수집하여 확률변수로 적용하여 굴착깊이(10m, 20m, 30m)에 따라 목표신뢰도지수 3.1을 만족하는 하중-저항계수를 산정하였다. 저항계수 산정결과 저항계수(Φi)는 0.07~1.00까지 산정되었으며 모든 한계상태식에서 굴착깊이가 깊어짐에 따라 저항계수가 증가하는 경향이 나타났다. 이후 하중-저항계수의 비(γ/Φ)와 굴착깊이에 대한 회귀분석 결과 R2이 0.30~0.81로 나타났으며 모든 항목에서 굴착깊이가 깊어짐에 따라 γ/Φ가 급격히 감소하는 반비례 관계를 보이는 것으로 분석되었다.

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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 : 42
  • No :2
  • Pages :21-29
  • Received Date : 2026-01-12
  • Revised Date : 2026-03-05
  • Accepted Date : 2026-03-10
  • DOI :https://doi.org/10.7843/kgs.2026.42.2.21
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