| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fluid transport method of excavation soil using a foam inhibitor in a cellular shield construction method which becomes advantageous in improving certainty of defoaming, safety and workability.SOLUTION: When excavation of soil is started by a shield machine 10, a slurry feeding pump 48, a crusher 52 and a plurality of slurry discharge pumps 56 are operated and in a regulation tank 66, a foam inhibitor is injected into first slurry. Cellular soil discharged from a conveyer 20 is confluent and mixed with the first slurry in a confluence pipe 44 and becomes second slurry, wherein the second slurry contains cells of the foam inhibitor and the cellular soil. Next, by mixing the second slurry containing cells and the foam inhibitor, most of cells of the second slurry are extinguished. The second slurry in which most of cells are extinguished is moved to a shunt 54 after gravel is crushed in the crusher 52, and moved to a vibrating sieve device 64 via a slurry discharge pipe 50 by the plurality of slurry discharge pumps 56.</p> |
