| 摘要 |
PURPOSE:To shorten the time of construction work as well as reduce the amount of resin liquid to be used by a method in which chemical grout for solidifying rockbed is injected into a rock bolt by using a two-component type expandible urethane resin having a given hardening time after mixing of two liquids as the chemical grout. CONSTITUTION:A rock bolt is driven into a hole drilled by drill, coal pick, etc., and a coupler 25 with check valve is attached to the back end of the rock bolt. A hole 11 with connecting unit 10 is attached by onetouch manner to the coupler 25 and the liquids A and B of urethane resin are sent under pressure into the rock bolt from the hose 11. Since the opening and the neighborhood of the hole is closed by the urethane resin, the leak of the urethane resin can be prevented.
|
