Air-pressurized caisson construction method - Air-pressurized caisson construction method

...The cut and fill method is used in shallow areas, where part of the water surface is sealed off with sheet piles, etc., and then drainage, excavation, tunnel construction, and backfilling are carried out inside the sealed area, and the sheet piles, etc. are then removed. The tunnel is completed by repeating this process. The air caisson method is also called the compressed air caisson method. An island is built on the water surface, and the main body of the tunnel is built on top of it, divided into appropriate lengths. Compressed air is pumped into the work chamber below the main body to prevent water from entering, and the tunnel is excavated while the tunnel is excavated, and the tunnel is lowered into the designated position. This process is repeated to connect the main body in sequence and complete the work. ...

*Some of the terminology used in relation to the "compressed air caisson construction method" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…開削埋戻し工法は水深の浅い場所で用いられ，水面の一部を矢板などで締め切り，その中で排水，掘削，トンネル築造，埋戻しの作業を行ってから矢板などを撒去する工法で，この作業の繰返しによりトンネルを完成する。空気ケーソン工法は圧気ケーソン工法とも呼ばれる。水面に島を築いてその上に適当な長さに分割したトンネル本体を作り，本体下の作業室に圧縮空気を送り水の浸入を防ぎながら掘削し，トンネルを所定の位置に沈降させる方法で，これを繰り返し本体を順次接続し完成させる。…

※「圧気ケーソン工法」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