| 摘要 |
PURPOSE:To contrive proper changing discrimination by setting difference in the requirement degrees of changing jack patterns according to the elongation of the jack of a shield excavating-advancing machine, and by adding said requirement to change said patterns, when an adding value comes to a specified value. CONSTITUTION:In a shield excavating-advancing-machine 10, a laser generator 12, an optical wave range finder 14, and a laser target 16 are arranged, and when the shield excavating-advancing-machine 10 is excavating-advanced by a specified distance, then a deviation from estimated lines in the horizontal and vertical direction is measured. After that, in the shield excavating- advancing-machine 10, a plurality of shield jacks 21 are arranged, and the elongation of the jacks 21 is measured by a stroke meter, and the input of the measured value to an automatic controller 26 on ground via a controller 18 is provided. Then, with the automatic controller 26, the excavating-advancing direction of the shield excavating-advancing-machine 10 is inferred, and control signal is transmitted to a shield controller 22. As a result, the changing of jack patterns can be properly discriminated. |
