Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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A Study On The Deformation Behavior of Post-Construction Crest Settlement, Face Slab Deformation, and Leakage of Concrete Faced Rockfill Dams

콘크리트 표면차수벽형 석괴댐의 준공 후 정부침하와 슬래브 변형 및 누수 거동에 관한 연구

  • 김유성 (전북대학교 토목공학과) ;
  • 최재선 (SK건설(주)) ;
  • 원명수 (평화지오텍(주) 연구개발실 기술연구소) ;
  • 이희훈 ((주)도화종합기술공사 지반부)
  • Received : 2009.05.01
  • Accepted : 2009.06.22
  • Published : 2009.06.30
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Abstract

The purpose of present study performed 27 CFRD cases analyses to predict and effectively use post-construction crest settlement, face slab deformation, and leakage as indexes for the maintenance and management of concrete faced rockfill dams(CFRD). The results showed that the range of post-construction crest settlement suggested by Sherard and Cooke (1987), and Clements (1984) had a good agreement in the case analyses using rockfills with very high intact strength, but it had a trend which underestimated crest settlement in the cases using rockfills with medium to high intact strength. The leakage case analyses showed that leakage is mainly caused by face slab deformation due to the water load, the maximum leakage in general was observed during the first reservoir filling, and leakage was rapidly increasing when the dam height exceeds 125m.

본 연구에서는 준공 후 정부침하, 콘크리트 슬래브 변형, 누수량 등의 CFRD 거동 예측과 유지 관리 지표로 유용하게 활용될 수 있도록 하기 위해 국내외 27개의 콘크리트 표면차수벽형 석괴댐 (CFRD)의 사례를 분석하였다. 검토결과 Sherard와 Cooke(1987)과 Clements(1984) 등이 제안한 준공 후 정부침하 범위는 록필 재료의 강도가 매우 양호한 경우에는 적합하나, 보통에서 양호한 경우는 과소평가하는 경향이 있는 것으로 나타났다. 누수량 사례분석결과 CFRD에서 누수량의 주원인은 담수하중에 의한 슬래브의 변형이고, 최대 누수량은 주로 최초 담수중에 발생하고, 댐 높이가 125m보다 커지게 되면 누수량이 급증하는 경향이 있는 것으로 나타났다.

Keywords

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