한국지반공학회지:지반 (Geotechnical Engineering)

한국지반공학회 (Korean Geotechnical Society)
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콘크리트 표면차수벽형 석괴댐 지지층의 토질특성

Soil Properties of Bedding Bone for Concrete Faced Rockfill Dam

  • 배종순 (정회원, 경상대학교 공과대학 토목공학과) ;
  • 성영두 (생산기술연구소 연구원, 정회원, 한국수자원공사)
  • 발행 : 1996.02.01
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초록

The bedding zone which influence directly to the safety of dam is supporting the face slab under hydraulic load in concrete faced rockfill dam. In case that leakage is developed due to various ruptured joint or cracks of face slab and etc., the bedding zone should limit the leakage by low permeability and keep the internal stability. In this study for the proper coefficient of permeability various properties, such as gradation, dry density, performance of embankment work and etc. were analysed. The results from the large scale test of permeability and density are summerized as follows : 1. Coefficient of permeability is decreased clearly by increase of dry density. 2. The particles smaller than the No.4 strive( p,) greatly influences the permeability under dry density of 2.24t 1 m3. 3. In case of C.40 and p,40%, even if dry density decreased to 2.0t/m3, the permeability coefficient is assumed to u x1-scm/s and internal stability is abtained. 4. Generally in dam construction since dry density and uniformity coefficient of bedding zone were higher than 2.2t/m3 and 50 respectively p, of 30~40% is assumed to be suitable and permeability coefficient of below 1$\times$10-3cm l s is expectable.

키워드

참고문헌

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  2. 남강다목적댐 건설공사 실시설계보고서 건설부
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  4. 토목재료 시험법과 해설 및 응용 최계식
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  8. 구조물 뒷채움 및 채움토질의 역학적 특성과 다짐 시공에 관한 연구 한국전력공사 기술연구원
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