gravity dam

Japanese: gravity dam(英語表記)gravitydam
gravity dam

...We will discuss these and fill dams in a little more detail below.
[Gravity dam]
A dam is a structure in which the weight of the dam concrete resists the dam's collapse or sliding due to large external forces such as the water pressure of the reservoir or earthquake forces (a 100m high dam would be subjected to a force of about 25,000 tons over a width of just 3.5m). The cross section of the dam is usually a triangle with an upstream face that is nearly vertical and a downstream face with a slope of 0.8 (vertical 1.0 vs. horizontal 0.8).

*Some of the terminology that mentions "gravity dam" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…以下ではこれらとフィルダムについてやや詳しく述べる。
[重力ダムgravity dam]
 貯水池の水圧や地震力などの大きな外力(高さ100mのダムでは幅わずか3.5mで約2万5000tの力がかかる)によってダムが転倒したり滑動することに対して,ダムコンクリートの自重で抵抗させる構造のダム。その断面は上流面がほぼ鉛直,下流面が0.8(鉛直1.0に対して水平が0.8)のこう配をもつ三角形とするのがふつうである。…

※「gravity dam」について言及している用語解説の一部を掲載しています。

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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