This gravity dam was completed in 1962 on the Dixence River, a tributary of the Rhône River in Switzerland. It is 284m high and the tallest concrete dam in the world. It has a crest length of 700m, a dam volume of 6 million m3, a maximum water level of 2,364m above sea level, a storage capacity of 400 million m3 and a generating capacity of 840,000 kW. When construction began in 1953, it was estimated to take 15 to 17 years, but improvements were made so that 1 million m3 of concrete could be poured per year, and it was completed in 8 years. Because it is a large dam, it was opened to the public halfway through construction, and for this reason, a special construction method was used, such as leaving gaps in the construction to prevent the water pressure of the reservoir from being applied to the concrete poured later, and then filling the gaps at the end. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
スイスのローヌ川上流の支流ディクサンス川に1962年に完成した重力ダム。高さは284mで,コンクリートダムとしては世界最高。堤頂長700m,堤体積600万m3,満水面は海抜2364m,貯水量4億m3で84万kWの発電能力をもつ。1953年に工事を始めたときは15~17年かかると見積もられていたが,1年間に100万m3のコンクリートを打ち込めるように改善したので8年で完成した。大ダムなので工事中途から供用を開始したが,そのため後から打ち込むコンクリートに貯水池の水圧がかからぬようにすきまを設けて立ち上げ,最後にそのすきまをつめるなど,特殊な工法が用いられた。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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