| 摘要 |
PURPOSE:To make it possible to obtain accurate position measuring data even if a shield machine body sideslips by mounting gyrocompasses on a succeeding truck connected to the shield machine body moving on a rail. CONSTITUTION:Gyrocompasses 10 and 10 are mounted on a succeeding truck 3 connected to a shield machine body 1 through a coupling rod 2 moving on a rail. After that, an angle made with the coupling rod 2 and shield machine bod 1 is detected by an angle detector 11 provided to a pivot with the coupling rod 2 and shield machine body 1. An angle made with the coupling rod 2 and the succeeding truck 3 is detected by an angle detector 12 provided to a pivot with the couplind rod 2 and succeeding truck 3. A position of the shield machine body 1 is calculated on the basis of an azimuthal angle of the gyrocompasses 10, position data and detection data of both angle detectors 11 and 12. At that time, the succeeding truck 3 moves on the rail, so that the gyrocompasses 10 are not influenced by sideslip of the shield machine body 1, and accurate position measuriang data can be obtained. |
