| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pipe roof construction method excellent in workability for enabling the removal of frozen soil and sediment from between steel pipes without giving damage to the frozen soil. <P>SOLUTION: On a moving device 21, an up-and-down moving part 25 is also provided. The up-and-down moving part 25 can move a nozzle 27 mounted at the front end, in a direction perpendicular to the axial direction of steel pipes 3 by a motor, etc. The nozzle 27 is connected to a water forcing device, etc., rotatably via a swivel joint, etc., with the moving direction of the up-and-down moving part 25 as an axis. The nozzle 27 is therefore movable in the axial direction of the steel pipes 3 and in the direction perpendicular thereto and capable of spraying water while rotating itself. According to this invention, water spray is accompanied by the measurement of the temperature of frozen soil. <P>COPYRIGHT: (C)2013,JPO&INPIT |
