METHOD FOR LAYING CABLE PROTECTIVE TUBE

摘要

PROBLEM TO BE SOLVED: To efficiently lay cable protective tubes in a tunnel over the full length of the tunnel by carrying cable protective tube carrying trucks in the tunnel from both shafts on both sides of the tunnel and successively connecting the tubes. SOLUTION: Trucks 7 carrying a plurality of cable protective tubes 8 are carried in a tunnel from both shafts 2 and 3 on both sides of the tunnel by means of starting vehicles 6 through pressing devices 5 and the tubes 8 are respectively connected to cable protective tubes 8 on a truck 7 which is already carried in the middle section of the tunnel by respectively inserting the corresponding end sections of the tubes 8 into both ends of the tubes 8 on the truck 7 by pushing the end sections with the pressing plates 16 of the pressing devices 5. Then, after the vehicles 6 are respectively moved backward to the shafts 2 and 3 sides together with the pressing devices 5, a truck 7 carrying the next cable protective tubes 8 is connected to the vehicles 6 through the pressing devices 5 and the end sections of the laid tubes 8 are connected to the corresponding end sections of the tubes 8 on the truck 7 carried in the tunnel in the same way. By repeating the above-mentioned operations, a series of cable protective tubes are laid in the tunnel over the full length of the tunnel.