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조립토 하천제방의 수위파형결정에 관한 수치해석적 연구

Numerical Analysis of Hydrograph Determination for Cohesive Soil Levee

  • 김진만 (한국건설기술연구원 Geo-인프라연구실) ;
  • 김지성 (한국건설기술연구원 하천해안연구실) ;
  • 오은호 (한국건설기술연구원 건설관리.경제연구실) ;
  • 조원범 (한국건설기술연구원 Geo-인프라연구실)
  • Kim, Jin-Man (Geotechnical Disaster & Environment research Division, KICT) ;
  • Kim, Ji-Sung (Geotechnical Disaster & Environment research Division, KICT) ;
  • Oh, Eun-Ho (Geotechnical Disaster & Environment research Division, KICT) ;
  • Cho, Won-Beom (Geotechnical Disaster & Environment research Division, KICT)
  • 투고 : 2013.12.23
  • 심사 : 2014.04.17
  • 발행 : 2014.04.30

초록

하천제방 건전도 평가는 하천설계기준 해설(2009), 구조물기초 설계기준 해설(2009) 등 관련 기준을 토대로 한계동수경사법, 한계유속법 등에 의한 파이핑 안전성과 제내지 및 제외지의 활동안전성 평가에 의하여 수행된다. 이때 수위파형은 건전도 평가 시 가장 중요한 설계입력자료이나 관련 국가기준에서 그 결정방법을 제시하지 못함으로서 부정확한 설계가 이루어지고 있다. 본 논문에서는 낙동강 문산제를 대상으로 평수위 상승, 홍수위 지속, 수위하강, 홍수빈도 등 개별 수위파형을 변화시켜가면서 제방 안정성에 미치는 영향 정도와 합리적인 수위파형특성을 제안하였다. 평가결과, 문산제 조립토 제방의 설계수위파형은 최대 57시간 이상의 평수위상승시간 및 53시간 이상의 홍수위지속시간 등을 반영할 것을 제안하였다.

The integrity evaluation of river levee includes slope stability evaluation of riverside land and protected low-land, and safety of piping with respect to critical gradient and critical velocity based on related regulations, such as Design Criteria Rivers Commentary (2009), Structural Design Criteria Based Commentary (2009). The design hydro-graph is the most important design input factor for the integrity evaluation; it can be inaccurate due to the absence of its decision methods suggested by the national level. The authors in this paper evaluated numerical analytic levee integrity for piping and slope stability by changing each design hydro-graph, including rising ordinary water level, lasting flood water level, falling water level, and flood frequency for Mun-san-jae on Nak-dong River. Finally, the authors suggested that the levee integrity of piping and slope stability are very sensitive to the changes of increasing time of ordinary water level by 57 hours and lasting time of the flood water level by 53 hours, respectively, for Mun-san-jae.

키워드

참고문헌

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피인용 문헌

  1. Considerations on the stability analysis of the waterway slope reflecting ship-wave effect vol.51, pp.3, 2015, https://doi.org/10.14770/jgsk.2015.51.3.303