| 摘要 |
A method for evacuating transfer air contained in a binding agent from a mixture of pressurized air and binding agent when stabilizing earth masses by adding binding agent. In the method is used an apparatus comprising means (22) for producing pressurized air, a binding agent container (21), a supply pipe (26, 30) for the mixture of pressurized air and binding agent, and an apparatus for mixing the binding agent into the earth mass. The pressurized air used for transferring the binding agent is evacuated through a separate discharge pipe (31) by means of the following measures before the pressurized air is conveyed into the earth mass: 1) the binding agent is conveyed into a storage space (36) with a binding agent discharge opening (37) into the ground, and 2) the pressure level in the apparatus is adjusted to be such that the pressure in the storage space (36) exceeds the counterpressure caused by the ground at the discharge opening (37), whereupon the binding agent discharges from the storage space (36) via the discharge opening (37) out into the ground and at least a part of the air discharges controllably from the upper part of the storage space (30) into the discharge pipe (31). |
