| 摘要 |
PURPOSE:To remove suspended matter in a stabilizing agent, by a method wherein the suction port of a pump is disposed to the bottom part of an excavated hole, the delivery port of a different pump is located to the central part of the excavated hole, a flow along the slope of an expansion bottom part is formed. CONSTITUTION:After an expansion bottom 100 is excavated by an earth drill process, a suspended matter removing device is hung down by means of a hook 11 and is seated on the bottom part of the excavated hole. With an upper submerged pump 1 driven, muddy water is sucked with the aid of the submerged pump 1, and is discharged through a conical pipe 4d of a piping 4. Simultaneously, with a lower submerged pump 6 driven, muddy water in the bottom part of the excavated hole is pumped up to form a flow in the direction of an arrow mark along a slope 100a of the expansion bottom part 100. The pumped up high concentration muddy water from the expansion bottom part 100 is discharged to a ground surface through a hose 5, the piping 4b, and a hose 7. |
