STRAY CURRENT INTERFERENCE ON HIGH-SPEED RAIL TRANSIT SYSTEMS AND SURROUNDING BURIED METALLIC STRUCTURES

In this paper the issue of the interference caused by stray currents generated by low-speed rail transit systems on civil works (viaducts and tunnels) of the high-speed railway system and on other surrounding and underground metallic structures (methane and gas pipelines, and cables) is presented. The effects of electromagnetic couplings have been considered and the protective provisions to be adopted are described. The results of d.c. interference measurements recently carried out by the authors on two critical sites of the Rome-Naples high-speed rail transit line currently under construction are presented.