Ilisu Dam and Hepp Selection and Evaluation of Embankment Material
Ilisu Hydropower Project is located on the Tigris River in the Anatolian area of South-East Turkey.Within a chain of other multipurpose projects on the same river, it is the most important one and conceived for hydropower production.The project is developed by General Directorate of State Hydraulic Works (DSI), the Turkish Government organization responsible for water supply and water use.Studies for the project started in the 1950-ies.The Final Design and Tender Project were completed in 1982.Near the village of Ilisu the Tigris River will be dammed up about 130 m high creating a plant with a capacity of 1 200 MW.A reservoir with over 10 billion m3 active storage, equaling approximately an average annual yield, is created by the 135 m high dam.The plant will produce around 4 000 GWh of electrical energy per year.While originally conceived as a clay-core rockfill dam with over 45 million m3 of embankment, for economic reasons the dam type was changed to a concrete faced rockfill dam (CFRD) after awarding the Contract in 2007.The CFRD has a fill volume of around 24 million m3.This dam will be 1st rank in CFRDs with terms of dam volume.It is complemented by a concrete gravity structure at the right bank, which includes the power intakes and the spillway with a discharge capacity at PMF of 15 000 m3/s.From the 3 power intakes 3 power tunnels of 11 to 9 m diameter distribute the water to the 6 Francis units located in a surface power house in a dee Pexcavation.The river diversion with 3 tunnels of 12 m final diameter and 1 000 m length each, together with a 36 m high upstream cofferdam allows the discharge of the 50-years flood of over 6 000 m3/s.The diversion was taken into service in August 2012 and the cofferdam was completed in December 2012, at the beginning of the flood season.The embankment works for the CFRD had started already before the diversion and to date over 14 million m3 are in place, with 1 more million m3 added every month.Long evaluations and discussions with respect to the fill material for the dam had proceeded.The final concept includes the use of marly limestone, covered on the downstream slope with basalt.This arrangement allows the use of most of the rockfill material stemming from the huge excavations for the various project works.
Ilisu Dam and HEPP Concrete Faced Rockfill Dam (CFRD) Marly Limestone
Din(c)er Aydo(g)an Max Humbel O(g)uzhan Yavuz
DSI General Directorate, Ismet In(o)nü Bulvari, 06100 Yücetepe-Ankara,Turkey AF-Consult Switzerland Ltd.,T(a)fernstrasse 26, CH-5405 Baden, Switzerland DSI General Directorate, Ismet In(o)nü Bulvari, 06100 Yücetepe-Ankara, Turkey
国际会议
昆明
英文
325-334
2013-11-01（万方平台首次上网日期，不代表论文的发表时间）