Experimental Investigation on Reducing Gounding-Resistance in PerennialFrozen SedimentAreas

To solve the problem ofgrounding for lighting along theQinghai-Tibetrailway, experiments were conducted in an perennial frozen sediment area, where there were similar environments as the sections of theQinghai-Tibetrailway. The factors affecting the resistivity of frozen soilswere discussed, and some solutions to grounding for lightning using groundingmoduleswere introduced. It is verified that the groundingmoduleshave good performance for reducing grounding resistance in perennial frozen sediment areas, and the design requirements can be fulfilled by parallelly connecting necessary number ofgroundingmodules.