| 摘要 |
PURPOSE:To improve the efficiency of embedding a pipe by composing a propeller shaft body of an excavator of a double pipe to use an outside pipe line for supplying pressurized water and an inside pipe line for draining excavated earth and sand in a muddy water pressurizing engineering method. CONSTITUTION:A propeller shaft body 30 of an excavator 10 for laying a buried pipe 70 formed of vinyl chloride pipe or the like is composed of double pipes to form an inside pipe line 32 and outside pipe line 34 fixed to the inside of the buried pipe 70 by a holding means 40 provided with a tubular expansible body 42. Next, while pressurized muddy water is supplied from the outside pipe line 34 to an earth and sand taking-in chamber 14 at the tip, the excavated earth and sand are expelled from the inside pipe line 32. While the propeller shaft body 30 is pushed out by a jack as the excavation proceeds, the buried pipe 70 is added, so that the efficiency of execution can be improved. |
