| 摘要 |
PURPOSE:To precisely guide a shield excavator to the arrival target by receiving the magnetic field from a magnetic field generating loop coil provided on the shield excavator with a receiving sensor arranged in a guide pit, and correcting the displacement with the path of an excavation planned line. CONSTITUTION:When a shield excavator 1 reaches a guide position point M where an excavation can be corrected before the preset vertical shaft B or C is penetrated, the magnetic field is generated from a magnetic field generating loop 3. The magnetic field is received by a receiving sensor 7 arranged in a guide pit D, the signal data of the position of the receiving sensor 7 from the vertical shaft B or C are sent to a distance detecting device 9 and a signal processing device 11, and the position M of the shield excavator 1 is calculated. The distance of the shield excavator 1 to the vertical shaft B or C and the drift of the position of the shield excavator 1 from a planned line L are calculated. The data are sent to the shield excavator 1, and the drift quantity is corrected toward the target point of the vertical shaft B or C based on the data for an excavation. |
