Tunnel Boring Machine Shotcrete Construction "Subshot System"

The Denka Subshot System is a system that continuously supplies a special fiber-reinforced mortar called "Denka PF Mortar" using a mixing pump, and combines it with a liquid quick-setting agent called "Denka Subshot L" to enable continuous spraying construction from the rear cart of a TBM (Tunnel Boring Machine) and other equipment. This allows for rapid construction, reduction of in-tunnel work, and improvement of the working environment.