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Research Article

A Study on the Applicability of Revised River Levee Safety Evaluation System to the National River Levee Stability System

국가하천 제방안정성 평가체계에 대한 수정된 하천제방 안전도 평가체계의 적용성 검토 연구

Chun Mok Park1
,
Heui Soo Han2*
박 춘목1
,
한 희수2*
1Ph.D. Candidate, Department of Civil Engineering, Kumoh National Institute of Technology
2Professor, Department of Civil Engineering, Kumoh National Institute of Technology
1국립금오공과대학교 토목공학과 박사과정
2국립금오공과대학교 토목공학과 교수
*Corresponding Author
31 December 2024. pp. 659-678
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Abstract

Recent extreme heavy rain events and climate change have resulted in floods exceeding the planned discharge capacity, leading to large-scale damages such as river levee erosion and collapse investigations have revealed that such extensive damage to river levees is more often caused by seepage and piping in the levee fill and foundation, rather than fault in the levee’s design specifications. In response, national river levee stability assessment and integrated management system have been proposed. However, this system is limited to verifying whether the minimum safety factors stipulated by design standards are met. Therefore, this study references the river levee safety evaluation system proposed by Kim et al. (2018) and updates it to reflect recent design standards and guidelines. Using the revised river levee safety evaluation system, this study conducted a safety assessment of the national river Ansung River and evaluated the applicability of the revised river levee stability system. As a result of the test evaluation using the revised river levee safety evaluation system, although the same overall safety grade was calculated, the vulnerability scores were different, which made it possible to determine the priority order for maintenance and reinforcement, and it was considered to be effective in determining the priority order for development works.

Keywords
levee stability
national river levee stability system
river levee safety evaluation system
behavior analysis

최근 발생한 극한기후 등의 기후변화로 인해 계획홍수량 이상의 홍수량이 발생하여 하천 제방의 유실 및 붕괴 등 대규모 피해가 발생하였다. 이러한 하천 제방의 대규모 피해는 제방의 제원으로 인한 원인보다는 제체 및 기초 지반의 누수와 파이핑 등에 의한 유실로 인해 발생하는 것으로 조사되었다. 이에 따라 국가하천 제방 안정성 평가 및 종합관리 체계가 제시되었으나, 해당 체계는 설계기준에 따른 최소 기준 안전율의 만족 여부 만을 검토하는 한계가 있다. 따라서 본 연구에서는 평가체계의 일환으로 Kim et al.(2018)이 제시한 하천제방 안전도 평가체계를 차용하여 최근 설계기준 등을 반영하여 수정하였다. 본 연구를 통해 수정된 하천제방 안전도 평가체계를 통해 국가하천인 안성천을 대상으로 안전도 평가를 수행하고 안전도 평가체계의 적용성을 검토하였다. 수정된 하천제방 안전도평가체계를 통한 시범평가 결과, 같은 종합 안전도 등급이 산정되었음에도 취약도 점수가 달라 보수 ‧ 보강의 우선순위를 결정할 수 있었으며, 이에 따른 정비사업의 우선순위 결정에 효과적인 것으로 검토되었다.

키워드
제방 안전성
국가하천 제방안정성 평가체계
하천제방 안전도 평가체계
거동분석
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 34
  • No :4
  • Pages :659-678
  • Received Date : 2024-12-02
  • Revised Date : 2024-12-25
  • Accepted Date : 2024-12-26
  • DOI :https://doi.org/10.9720/kseg.2024.4.659
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