GAS INSULATED TRANSMISSION LINE TUNNEL

摘要

PROBLEM TO BE SOLVED: To improve the efficiency of the installation work and improve the safety by a method wherein a groove is provided at the center part of a floor and the sheath of a second gas insulated transmission line is installed in the groove. SOLUTION: A gas insulated transmission line installing part 2a is formed on the bottom part of a gas insulated transmission line tunnel and a groove 6 is provided at the center part of the flat surface of the gas insulated transmission line installing part 2a. The sheath 1 of a second gas insulated transmission line is installed in the groove 6. An exhaust pipe 7a by which gas in the tunnel is exhausted through the groove 6 and an air supply pipe 7b through which the fresh air is supplied are provided respectively on both sides of the lower part of the sheath 1 of the second gas insulated transmission line. With this constitution, the efficiency of the installation work can be improved and, further, the safety in the gas insulated transmission line tunnel can be improved.