| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of repairing and widening an existing tunnel without limiting a working space and a working time zone. SOLUTION: A shelter 1 having a smaller outline than the cavity section of an existing tunnel and a sectional shape capable of passing a vehicle T thereunder as usual, a guide member 2 (2a, 2b) formed along the outer periphery of the shelter 1 and a repairing and widening tool 3 (3a, 3b) secured thereto to be movable along the guide member 2 are provided. The guide member 2 includes a vertical guide rail 2a extending to the vertical section of the tunnel and a lateral guide rail 2b extending to the lateral section of the tunnel, wherein both are engaged so that one can be moved along the other fixed along the outer periphery of the shelter 1 and the repairing and widening tool 3 is secured to the other. The shelter 1 is provided with a wheel 4 as moving means, a belt conveyor 5 as carrying means and a storage space 6. |
