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2025 Vol.26, Issue 6 Preview Page
A Statistical Approach II for Improving Stability Evaluation Method of Cut Slope: Analysis of Weighting Factors for Slope Risk Assessment

깎기비탈면의 안정성 평가방법 개선을 위한 통계연구 II: 비탈면 상태평가 항목의 가중치 분석

Suho Cho1
,
Teawan Bang2
,
Bumsik Hwang3
,
Hansaem Kim4*
조 수호1
,
방 태완2
,
황 범식3
,
김 한샘4*
1Researcher, Department of Civil & Environmental Engineering, Dongguk University
2Ph.D. candidate, Department of Civil & Environmental Engineering, Dankook University
3Senior Researcher, Korea Expressway Corporation Research Institute, Korea Expressway Corporation
4Assistant professor, Department of Civil & Environmental Engineering, Dongguk University
*Corresponding Author
1 June 2025. pp. 15-23
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Abstract

Recent climate change and increased heavy rainfall events have led to a rise in cut slope failures. Furthermore, the natural aging of previously built highway infrastructure and the sheer increase in highway construction add to this recent pressure for improved maintenance methods. Currently, slope safety is assessed according to a 12-criteria system by the Korea Authority of Land and Infrastructure Safety (KALIS). This study aims to review the reliability of this assessment by selecting pilot sections according to historical slope collapse and traffic volume, and examining their respective slope risk assessments. We distinguish two main perspectives in analyzing the reliability of slope risk assessment. The first looks at uncertainties that rise from the ambiguity of the evaluation criteria and the qualitative nature of these judgments. The second questions the appropriateness of the scoring system, which calculates a comprehensive score using a simple arithmetic mean and assigns risk grades accordingly. Using the Pearson Correlation Coefficient for statistical evaluation and the Relief-F Feature Selection method for importance analysis, this study quantifies the flaws in the assessment criteria and the scoring system.

Keywords
Slope stability
Risk assessment
Cross-correlation
Statistical uncertainty

최근 기후변화와 집중호우로 인한 비탈면 붕괴사례가 증가하고 있으며, 고속도로 비탈면 관리 수량의 증가와 노후 비탈면 증가에 따른 비탈면 유지관리 방안 개선의 필요성이 대두되고 있다. 국내 비탈면 위험도 평가는 국토안전관리원의 안전점검 및 정밀안전진단 세부지침에 따라 평가되며, 총 12가지 평가 항목으로 평가된다. 본 연구는 비탈면 붕괴 이력과 교통량 등을 고려하여 시범구간을 선정하였으며, 시범구간의 비탈면 위험도 평가 표본을 대상으로 분석하였다. 비탈면 위험도 평가의 불확실성 검토는 크게 두 가지 관점으로 구분할 수 있다. 첫 번째는 평가결과의 신뢰성에 대한 분석으로 평가 기준과 평가 점수의 근거와 정성적 판단에 의해 발생할 수 있는 불확실성을 검토한다. 두 번째로 산술 평균으로 종합 점수를 산출하고 등급을 부여하는 점수 체계에 대한 적합성을 분석한다. 분석기법으로 통계적 상관분석 기법인 피어슨 상관계수(Pearson Correlation Coefficient, PCC)분석과 중요도 분석 기법인 릴리프-에프 피처 셀렉션(Relief-F feature Selection)으로 검토함으로써 평가 항목 기준 및 평가 체계의 문제점을 정형화하였다.

키워드
비탈면 안정성
위험성 평가
교차 상관관계
통계적 불확실성
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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 26
  • No :6
  • Pages :15-23
  • Received Date : 2025-04-09
  • Revised Date : 2025-04-23
  • Accepted Date : 2025-05-08
  • DOI :https://doi.org/10.14481/jkges.2025.26.6.15
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