Kabushiki Kaisha Takenaka Komuten

Tomohiro Teramura

Mamoru Shinozaki

Hirosuke Kubota

Masayasu Kitano

Motoki Kondo

Toshiyuki Oshita

Katsumi Shirai

This invention provides a method of preventing loss of muddy water used in boring a hole in the ground by a drill bit or the like with the muddy water introduced into the hole to stabilize hole walls and to remove slime resulting from the boring. When the muddy water is getting lost to the soil, a chemical liquid comprising an isocyanate compound or including an isocyanate compound as a main component is introduced along with a fibrous filler to a depth of the hole. The position from which the muddy water is leaking is filled with the fibrous filler and is sealed with a cured product of the chemical liquid.

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Yawata, Japan

Tomohiro Teramura