| 摘要 |
PROBLEM TO BE SOLVED: To uniformly separate grout fed by pressure from one injection pump via a liquid separation disc into plurality, and to simultaneously inject those separated grout via a plurality of injection holes installed in the ground.SOLUTION: A first section in which grout to be fed by pressure via an injection hose 4 by an injection pump 3 gets to the entrance of a discharge port 7 in a liquid separation disc 5 and a second section in which the grout to be separated in the liquid separation disc 5, and to be made to pass through the discharge port 7 is injected from a plurality of injection holes 11 via an injection hose 8 into the ground 12 are formed. The total cross-sectional area of the plurality of discharge holes 11 is set so as to be larger than the total cross-sectional area of the plurality of discharge ports 7, and a flow rate is preliminarily determined, and a ground resistance pressure is measured, and the grout flowing through the first section is imposed with a load so that a compulsive pressure can be set to be higher than the ground resistance pressure, and the grout flowing through the second section is injected on the basis of the ground resistance pressure via the injection holes 11. |
