| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively prevent the collapse of a excavated wall surface, to recycle waste paper and to save a solidifying agent by mixing paper or the like, such as pulverized waste paper, and the solidifying agent, adding water to the mixture, agitating the mixture and injecting the mixture to the wall substrate at the time of boring of the excavated wall surface. SOLUTION: Water or preferably water in a boiling state is added to a waste paper 1 cut by a pulverizing machine 2 and the mixture is completely pulverized by agitating and mixing. The pulverizing without the addition of the water is equally well. The disintegrated waste paper 1 is introduced by a force feed pump 5 to a mixer 8. A prescribed amt. of cement and bentonite are supplied from a cement silo 9 and a bentonite silo 10 to the mixer 8. The water of a water tank 3 is supplied from a water supply pipe 13 to the mixer 8 to agitate and mix the waste paper 1, the solidifying agent and the water. The mixture is then fed through a pipeline 14, the force feed pump 15 and a pipeline 16 to an auger machine 17. The mixture is injected from an auger 18 simultaneously with boring by the auger machine 17. The mixture attains the state of forming films on the hole walls. The wall is thus stabilized and the collapse of the wall surface is prevented.</p> |
