Evaluation of Seepage Behavior of Concrete FacedGravel Fill Dam
Recently,sand/gravel materials,instead of crushed rock materials,are also utilized as a main rockfill material to overcome geological and environmental problems.In this paper,an experimental scheme for centrifuge modeling of concrete faced gravel-fill dam was developed and two centrifuge tests were performed in order to investigate the effect of drainage zoning on seepage flow. The dam considered in this study was designed to have Zone 3Bs of high permeability in main gravel-fill zone to enhance safety against accidental water infiltration into the dam. Two centrifuge tests with and without Zone 3Bs were performed in order to investigate the effect of Zone 3Bs on seepage flow.Model dams were made of soils sieved to have equivalent permeability,because the grain size of original soil material is too big to construct model dams.Water infiltration was simulated by rising water table over pre-implemented cracks on the facing.Infiltration behaviors of model dams were monitored by pore water pressure transducers and cameras during the tests.Centrifuge tests showed that the drainage zone of CFGD drains off the infiltrated water out of the dam in a short time.Numerical modeling performed on the testing models also supported the effectiveness of the drainage zone.
Concrete Faced Gravel Fill Dam centrifuge modeling zoning unsaturated seepage
Sung-Eun Cho Dong-Hoon Shin Eun-Sang Im Han-Gyu Park Wan-Ho,Lee
Senior Researcher,K-water Institute,K-water Principal Researcher,K-water Institute,K-water Research Fellow,K-water Institute,K-water President,K-water Institute,K-water
国际会议
The 1st International Symposium on Rockfill Dams(第一届堆石坝国际研讨会)
成都
英文
357-364
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）