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2025 Vol.26, Issue 6
A Statistical Approach I for Improving Evaluation Method of Slope: Comparison of Domestic and Foreign Criteria

깎기비탈면의 안정성 평가방법 개선을 위한 통계연구 I: 국내외 상태평가 기준의 비교

Teawan Bang1
,
Suho Cho2
,
Hansaem Kim3
,
Wanjei Cho4*
방 태완1
,
조 수호2
,
김 한샘3
,
조 완제4*
1Ph.D. Candidate, Department of Civil & Environmental Engineering, Dankook University
2Researcher, Department of Civil & Environmental Engineering, Dongguk University
3Assistant Professor, Department of Civil & Environmental Engineering, Dongguk University
4Professor, Department of Civil & Environmental Engineering, Dankook University
*Corresponding Author
1 June 2025. pp. 5-13
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Abstract

A condition evaluation is conducted to inspect external defects and damages, ensuring the safety and maintenance of infrastructure. Based on this assessment, slope stability is thoroughly evaluated. However, evaluation criteria are determined by administrative entity in South Korea, leading to inconsistencies in standards. Therefore, a standardized slope management system is required. The Korea Authority of Land and Infrastructure Safety (KALIS), which is responsible for slope maintenance, is insufficient bases for factors and scoring standards. A systematic evaluation framework needs to be established, as some visual inspection-based factors include subjective judgment. In this study, reclassified administration standards based on field data were modified to improve the existing criteria. A total of 124 identical slopes within the study area were analyzed based on different evaluation standards. As a result, approximately 70–99% of slopes were reclassified into C or D grades compared to the KALIS evaluation, indicating a higher risk level. The subordinate rating of the same slopes appears to be due to differences in score distribution among evaluation factors. It suggests that the current condition evaluation criteria may not adequately reflect the actual slope risk. Therefore, improvements should comprehensively consider factor weightings in domestic and foreign standards, generality, and effectiveness based on collapse cases.

Keywords
Risk assessment
Cut slope
Statistical technique
Weighting function
Slope stability

상태평가는 시설물의 안전 및 유지관리를 위해 외관의 결함 및 손상을 조사하는 과정이며, 이를 기반으로 한 안정성 평가로 종합적인 상태를 진단한다. 그러나 국내 비탈면의 상태평가 기준은 관리 주체마다 평가항목과 점수 체계가 일관적이지 않아 범용적인 비탈면 관리시스템이 요구된다. 특히 국내 비탈면 유지관리를 관할하는 국토안전관리원은 평가항목의 선정 근거가 체계적으로 제시되어 있지 않으며, 그 중 인위요인과 손상상태의 점수 기준 또한 미흡한 것으로 판단된다. 특히 육안조사에 의존하는 일부 항목은 주관적 의견이 포함될 가능성이 있어 객관적인 기준을 정립할 필요성이 있다. 본 연구는 동일한 비탈면을 다른 기관의 평가 기준으로 재분류하여 기존 상태평가의 개선 방향을 논의하고자 한다. 이를 위해 현장조사 데이터를 활용한 평가절차를 제안하였고, 연구지역 내 비탈면 124개소 대상으로 분석하였다. 그 결과, 기존 국토안전관리원의 평가결과와 달리 약 70~99%의 비탈면은 C 또는 D등급으로 하향평가되어 위험성이 더 높은 것으로 재분류되었다. 동일한 비탈면임에도 하향평가된 것은 항목별 점수분포 차이로 인해 초래한 것으로 보인다. 이는 상태평가 기준이 실제 비탈면의 위험성을 충분히 반영하지 못한 것을 시사하며, 추후 국내외 기준의 항목별 가중치, 범용성, 실제 붕괴사례와 같은 실효성 측면을 종합적으로 고려하여 개선할 필요성이 있다.

키워드
위험성 평가
깎기비탈면
통계론적 방법
가중치
비탈면 안정성
References
1

Byun, Y. S., Choi, J. C. and Seong, J. H. (2018), A Study on the methods to calculate mixed weights of the condition evaluation of rock slope, Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 22, No. 6, pp. 37~44 (In Korean).

2

Cha, J. H. (2019), A study on the risk assessment item of railway slopes for efficient maintenance, Master's thesis, Korea National University of Transportation. pp. 1~68 (In Korean).

3

Huang, S. L., Darrow, M. M. and Calvin, P. (2009), Unstable slope management program, FHWA-AK-RD-12-14, Federal Highway Administration, pp. 1~86.

4

Kim, S. H., Kwon, O. I., Kim, J. J. and Koo, H. B. (2017), Characteristics of road slopes and decision of priority for investigation at the central part of Vietnam, The Journal of Engineering Geology, Vol. 27, No. 3, pp. 275~292 (In Korean).

5

Korea Authority of Land&Infrastructure Safety. (2024), 시설물의 안전 및 유지관리 실시 세부지침(안전점검·진단 편) 해설서(절토사면), pp. 1~91.

6

Kwon, O. C., Jeong, S. Y., Lee, C. and Hwang, S. G. (2010), Applicability of the remote survey system for excavated rock surface, Journal of the Korean Society of Civil Engineers, Vol. 58, No. 11, pp. 43~54 (In Korean).

7

Lee, D. H., Jun, K. W., Jung, M. J. and Park, J. H. (2021), Evaluation of steep slopes adjacent to multi-use facilities in national parks using GIS, Journal of Korean Society of Disaster and Security, Vol. 14, No. 4, pp. 29~36 (In Korean).

8

Ministry of the Interior and Safety. (2023), 급경사지 재해위험도 평가기준, 행정안전부고시 제2023-36호.

9

Nadim, F., Kjekstad, O. and Peduzzi, P. (2006), Global landslide and avalanche hotspots, Landslides, Vol. 3, No. 2, pp. 159~173.

10.1007/s10346-006-0036-1
10

Nasir, N. M., Maulud, K. M. A. and Yusoff, N. I. M. (2016), Geospatial analysis of road distresses and the relationship with the slope factor, Journal of Engineering Science and Technology, Vol. 11, pp. 655~665.

11

Pantha, B. R., Yatabe, R. and Bhandary, N. P. (2010), GIS-based highway maintenance prioritization model: an integrated approach for highway maintenance in Nepal mountains, Journal of Transport Geography, Vol. 18, No. 3, pp. 426~433.

10.1016/j.jtrangeo.2009.06.016
12

Safeland. (2010), Living with landslide risk in Europe: Assessment, effects of global change, and risk management strategies, European Commission's 7th Framework Programme, No. 226479, pp. 6~106.

13

Seong, J. H. and Byun, Y. S. (2016), A study on the weights of the condition evaluation of rock slope used in entropy and AHP method, Journal of the Korean Society of Safety, Vol. 31, No. 5, pp. 61~66 (In Korean).

10.14346/JKOSOS.2016.31.5.61
14

Shin, C. G. and Lee, S. (2008), A study on evaluation model development for investigation priority decision for road cutting slopes using analytic hierarchy process, Journal of Korea institute for Structural Maintenance and Inspection, Vol. 12, No. 4, pp. 107~114 (In Korean).

15

Song, Y. K., Park, D. K., Son, Y. J. and Kim, T. H. (2012), A study on the improvement of stability checklist by analyzing the evaluation element for steep slopes, Journal of Korean Society of Hazard Mitigation, Vol. 2012, No. 4, pp. 77~84 (In Korean).

10.9798/KOSHAM.2012.12.4.077
16

Suk, J. W. (2015), A study on deducting evaluation items for rock cut slope using delphi survey, Journal of the Korea Academia- Industrial cooperation Society, Vol. 16, No. 4, pp. 2828~2836 (In Korean).

10.5762/KAIS.2015.16.4.2828
17

Wong, H. N. and Ko, F. W. Y. (2005), Landslide risk assessment - application and practice, Geotechnical Engineering Office, No. 195, pp. 10~98

18

Zhou, G., Esaki, T., Mitani, Y., Xie, M. and Mori, J. (2003), Spatial probabilistic modeling of slope failure using an integrated GIS Monte Carlo simulation approach, Journal of Engineering Geology, Vol. 68, pp. 373~386.

10.1016/S0013-7952(02)00241-7
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 :5-13
  • Received Date : 2025-04-04
  • Revised Date : 2025-04-08
  • Accepted Date : 2025-04-22
  • DOI :https://doi.org/10.14481/jkges.2025.26.6.5
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