| 摘要 |
PURPOSE:To make it possible to connect the last set complection ring to the following assembly ring with certainty by controlling an optimum attitude angle based on an actual measuted value so that the following assembly ring connected to the last set complection ring and a shield machine are stored within range of a tail clearance. CONSTITUTION:Jack stroke meters 8a-8c measuring the distance between the front end of the last set complection ring 2 and a shield machine 4 are provided to the internal wall of the shield machine 4. After that, tail clearance meters 10a-10c measuring the space interval between the front end of the last set completion ring 2 and the internal wall of the shield machine 4 are provided to the internal of the shield machine 4 and, at the same time, an attitude angle detector 12 such as a gyrocompass, etc., for measuring an attitude angle of the shield machine 4. Measuring data outputted from those measuring devices 8a-8c, 10a-10b and 12 is supplied to a control section 14, and a driving position, attitude angle, etc., of the shield machine 4 are calculated to output control signal to a driving mechanism 16. |
