| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pipe installation device capable of smoothly proceeding a pipe underground even when a natural ground comprises hard soil by allowing the device to dig a wider cross sectional area than a cross sectional area of the pipe, in front of the pipe, prior to proceeding of the pipe. <P>SOLUTION: When a pipe with quadrilateral cross section is installed in a ground 10 from a cavity part 100 that is formed in the ground, a pipe installation device 1 proceeds and installs the pipe in the ground by setting a rotary excavator 46, which rotates about a rotation center line L as rotation center in parallel with a surface perpendicular to a proceeding direction of the pipe, in front of a head opening 6t of the pipe (a head pipe 6) to be inserted into the ground first; and by proceeding the pipe and drilling the underground using the rotary excavator 46. The pipe installation device 1 has a sphere 30 on which a pole 42 of the rotary excavator 46 is fixed; a sphere rotation guide member 31 set inside of the head opening side of the pipe to hold the sphere so that the sphere can rotate about its center as a center of rotation; and sphere driving means 32 to rotate the sphere about its center as a center of rotation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
