| 摘要 |
PURPOSE:To precipitate waterglass component as gel to thereby prevent strength from being lowered, by introducing waterglass grout into the ground which has been previously penetrated with an inorg. salt-contg. soln. CONSTITUTION:An injection hole 1 is dug in the ground and a casing 2 is inserted into the hole. The discharging hole 3 of an injection pipe 5 is covered with a rubber 4, the pipe 5 is inserted into the hole, the space between the casing 2 and the pipe 5 is sealed by sleeve grout 6 and the casing 6 is drawn out. A strainer pipe 8 provided with a packer 7 is inserted into the pipe 5 and an injection material of an inorg. salt-contg. soln. is injected by means of a pump. An injection material of waterglass grout whose pH is alkaline is injected and caused to gel. |
