Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2009.03a
- /
- Pages.278-287
- /
- 2009
Evaluation of Zoning Effect on Seepage Flow in CFGD using Centrifuge Modeling
원심모형시험을 이용한 단면 구획이 CFGD의 침투 거동에 미치는 영향 평가
- Kim, Kyeong-Hwan (Dept. of Civil and Env. Eng., KAIST) ;
- Choo, Yun-Wook (Dept. of Civil and Env. Eng., KAIST) ;
-
Kim, Dong-Soo
(Dept. of Civil and Env. Eng., KAIST)
;
- Park, Han-Kyu (K-water) ;
-
Shin, Dong-Hoon
(K-water)
;
-
Cho, Sung-Eun
(K-water)
;
-
Lim, Eun-Sang
(K-water)
- 김경환 (KAIST 건설및환경공학과) ;
- 추연욱 (KAIST 건설및환경공학과) ;
-
김동수
(KAIST 건설및환경공학과)
;
- 박한규 (한국수자원공사 수자원연구원) ;
-
신동훈
(한국수자원공사 수자원연구원)
;
-
조성은
(한국수자원공사 수자원연구원)
;
-
임은상
(한국수자원공사 수자원연구원)
- Published : 2009.03.27
Abstract
This thesis studied effect of zoning on seepage flow in concrete faced gravel-fill dam (CFGD) designed to have selected main rockfill or gravel-fill zone, Zone 3Bs with higher permeability to enhance the safety against accidental water infiltration into the dam. For this purpose, centrifuge model tests with two cases, with and without Zone 3Bs, were performed in order to investigate the necessity and the function of Zone 3Bs. Model dams were made by soil samples with modified coefficients of permeability and concrete faced slab was simulated with aluminum alloy. Water infiltration was simulated by rising water table over cracks on the facing. Behaviors of model dams were measured by LVDTs, strain gages, pore water pressures and cameras. Form the results of centrifuge tests, it was found out that the Zone 3Bs acts as a protection of main gravel-fill zone by inducing flow paths for infiltrated water into it as well as by draining off the infiltrated water out of the dam in a short time.