| 摘要 |
PROBLEM TO BE SOLVED: To enhance incoming efficiency of a pipe unit, by shortening waiting time in a connecting yard of a self-propelled vehicle, in the case of constructing a pipe line by repeating work mounting the pipe unit in a carriage connected to the self-propelled vehicle to be carried in a pipe line laying pit after connected to the rearmost pipe unit in the pipe line to bring this carriage accompanied to be returned again to a starting pit. SOLUTION: This method comprises an incoming process for mounting a pipe unit 2 on a carriage 1 connected to the forward of a self-propelled vehicle 26 in a starting pit 28 to be advanced to a connecting yard to the rearmost pipe unit A2 in a pipe line laying pit 27, a return process connecting the carriages N1, N2 moved into the rearmost pipe unit A2 in a connecting process in the preceding time to the self-propelled vehicle 26 to be returned to the starting pit 28, and a connecting process performing work connecting pipe units B1, B2 on carriages M1, M2 separated from the above self-propelled vehicle 26 to the rearmost pipe unit A2 also to be formed with a pipe unit B2 in the rearmost separated from the carriage to be newly provided to move the separated carriages M1, M2 into the concerned newly provided rearmost pipe unit B2, so as to execute the above return process in parallel to the connecting process.
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