| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique for not removing, but safely leaving a waste pipe. <P>SOLUTION: There is provided an infilling method for waste pipe in which a waste pipe P buried in the ground is filled with a filler F by inserting a filling hose 13 serving as a flow passage for the filler F into the waste pipe P, inserting the filler F and air into an air mover 12 from a storage tank 14 and a compressor 15, and mixing and pressure-feeding the filler F and air to the filling hose 13 through the air mover 12. An intake of the air mover 12 for the filler F is provided below a discharge opening of the storage tank 14 to receive the filler which falls naturally, output of the air mover 12 is controlled so as to discharge air volume per unit time which is 15-35 times as large as air volume per unit time taken in the air mover 12 through the compressor 15, and a centering tool 16 is provided which positions an opening end of the filling hose 13 substantially in the center of a bore diameter of the waste pipe P. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
