| 摘要 |
PROBLEM TO BE SOLVED: To realize the reduction of a construction period of a non-cut and cover pipe jacking method for making a boring pipe progress in the ground by non-cut and cover and efficient boring work. SOLUTION: A process for moving a magnetic field generating means to a marking point described on a boring scheduled line (step S3), a process for measuring a posture of the front end of the boring pipe (step S4), a process for measuring a magnetic field of the front end of the boring pipe (step S4), a process for computing the position of the front end of the boring pipe to the magnetic field generator from the posture and the magnetic field of the front end of the boring pipe to be measured (step S5), a process for computing the position of the front end of the boring pipe to the boring scheduled line (step S6) and a process for controlling the boring of the boring pipe based on the position of the front end to be computed (step S7) are included, and a process for moving and setting the magnetic filed generating means to the following marking position is also included to repeat the step S4 to S8.
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