| 摘要 |
PROBLEM TO BE SOLVED: To form in a short period of time grooves that surround a telescopic joint when horizontally cutting and removing telescopic joints of a bridge and other structures with a wire saw.SOLUTION: Rail fixing devices 2 are fixed with anchor bolts 21 near both ends and both sides of the central part of a telescopic joint 1 that is cut and removed for installing traveling rails 30, 31 for wall saw machines 4. The wall saw machines 4 travel along the rails at the same time for simultaneously forming grooves 5A, 5B on both sides of the telescopic joint 1 and in the direction normal to the bridge axis. The rail fixing device 2 is rotated 90 degrees, without shifting the fixed position of the anchor bolt 21 of the rail fixing device 2, for laying rails 32, 33 in the bridge axis direction at both ends of the telescopic joint 1. The wall saw machines 4 cut the floor slab in the bridge axis direction for simultaneously forming grooves 5C, 5D at both ends of the telescopic joint 1. Thus, grooves 5, on which a diamond wire saw travels and surround the telescopic joint 1, are formed in a short period of time. |
