A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Laboratory Testing of Sediment Trap Efficiency of Seepage Flow through Rockfill Dyke
A number of laboratory tests were conducted to evaluate the efficiency of a proposed rockfill dyke in trapping suspended sediments in seepage flow subjected to low gradient conditions. This testing was part of a project to design a tailings containment facility to be built in a large lake in Canada. The sediment trap efficiency is an important input parameter for designing the tailings confinement system and determining the need for a sand filter on the inside (tailings and pond side) face of the dyke. The scope of the laboratory testing consisted of a number of sediment trap efficiency tests for coarse rockfill, fine rockfill, gravel rockfill and tailings sand. Two types of effluent, with and without flocculation, were tested in the laboratory, to simulate these possible operating conditions in the field. The laboratory facility was set up to simulate a conservatively high seepage flow condition across the proposed tail!rigs containment dyke. The experimental results showed that the process of sediment trapping in tailings sand is different from that in rockfill. Suspended sediment in seepage flow is trapped in tailings sand by the process of filtration, whereas in rockfill, sediment trapping occurs as a result of suspended particles settling in rockfill voids.
Laboratory Testing of Sediment Trap Efficiency of Seepage Flow through Rockfill Dyke
A number of laboratory tests were conducted to evaluate the efficiency of a proposed rockfill dyke in trapping suspended sediments in seepage flow subjected to low gradient conditions. This testing was part of a project to design a tailings containment facility to be built in a large lake in Canada. The sediment trap efficiency is an important input parameter for designing the tailings confinement system and determining the need for a sand filter on the inside (tailings and pond side) face of the dyke. The scope of the laboratory testing consisted of a number of sediment trap efficiency tests for coarse rockfill, fine rockfill, gravel rockfill and tailings sand. Two types of effluent, with and without flocculation, were tested in the laboratory, to simulate these possible operating conditions in the field. The laboratory facility was set up to simulate a conservatively high seepage flow condition across the proposed tail!rigs containment dyke. The experimental results showed that the process of sediment trapping in tailings sand is different from that in rockfill. Suspended sediment in seepage flow is trapped in tailings sand by the process of filtration, whereas in rockfill, sediment trapping occurs as a result of suspended particles settling in rockfill voids.
Laboratory Testing of Sediment Trap Efficiency of Seepage Flow through Rockfill Dyke
Ade, Femi (author) / Long, Dejiang (author) / Sawatsky, Les (author) / Wu, Shouhong (author)
World Water and Environmental Resources Congress 2001 ; 2001 ; The Rosen Plaza Hotel, Orlando, Florida, United States
Bridging the Gap ; 1-10
2001-05-15
Conference paper
Electronic Resource
English
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