• Geomechanics and Engineering
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• 제21권4호
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• pp.315-326
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• 2020

The long-term behavior of rockfill material used in the construction of infrastructures such as dams is of great significance. Because of concerns about the application of weak rockfill material in dam construction, further experimental studies on the behavior of these materials are required. In this study, laboratory experiments were performed to investigate the one-dimensional deformation and particle breakage of the weak rockfill material under stress. A one-dimensional compression apparatus was designed and developed for testing of rockfill materials of different maximum particle sizes (MPSs). The compression tests were performed under dry, wet and saturated conditions on samples of rockfill material obtained from a dam construction site in Iran. The results of the experiments conducted at the specimen preparation stage and the 1D compression tests are presented. In weak rockfill, the effect of the addition of water on the behavior of the material was uncertain as there were both an increases and decreases observed in particle breakage. Increasing the MPS of the weak rockfill materials increased particle breakage, which was similar to the behavior of strong rockfill material. In all of the MPSs examined, the settlement of specimens under wet conditions was higher than that observed under dry conditions. Also, the greatest deformation occurred during the first hour of loading.

• 지질공학
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• 제15권1호
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• pp.77-86
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• 2005

CFRD(Concrete fared Rockfill Dam)는 기존의 중심코어형 락필댐과 대별되는 우수한 구조적, 재료적 특성으로 현재 가장 널리 활용되는 댐 형식이다. 본 고에서는 그동안 이루어져온 기술의 축적을 바탕으로 CFRD의 설계와 시공에 있어 최근에 부각된 최신 기술들을 정리하여 향후 활용에 도움을 줄 수 있도록 하였다. 특별히 본 고에서는 최근 경험을 바탕으로 실무에서 적용되고 있는 연약한 암을 이용한 댐체 축조 사례, 대단히 큰 입경의 락필 재 대신 도입된 sand-gravel fill 댐에 대한 경험, plinth와face slab를 연결하기 위해 새롭게 채택된 연결 슬래브공법, 기존 댐의 증고사례, 역침투 현상, 댐 하류의 환경친화죤, 차수벽 슬래브의 두께와 철근비의 변화 추이, 충적층 기초의 처리, 최근 적용되기 시작한 curb element 공법등에 대한 간략한 기술적 동향을 고찰하여 관련 기술자들의 이해를 돕고자 하였다.