Tunnel repair method and repair equipment for existing tunnels

摘要

PROBLEM TO BE SOLVED: To provide a tunnel repairing method and a repairing device for an existing tunnel capable of further improving workability and safety. SOLUTION: As a tunnel repairing method for an existing tunnel, an invert repair is provided on a rear side Lb in the extension direction of a device body having a side wall portion, and has an excavation jack 150 which expands and contracts in the extension direction by using an installed invert block 40 as a reaction force. Using the device 100, the excavation process of removing the tunnel bottom 3 while retaining the soil with the invert repair device 100 arranged at the location where the invert block 40 is laid, and extending the excavation jack 150 according to the removal of the tunnel bottom 3, The invert repair device 100 is advanced in the extending direction, the excavation jack 150 of the invert repair device 100 advanced by a predetermined length is reduced, and the invert block laying step of laying the invert block 40 is repeated. [Selection diagram] Fig. 5