公路隧道雷电防护研究

Lightning Protection of Highway Tunnel

通过对太行山区隧道机电设备频遭雷击事件的调研,分析了雷击灾害频发的河北省邢和隧道的地理、气象环境,并对雷击现场进行多次测试研究,对隧道防直击雷和雷电电磁脉冲两方面采取以下5项防雷措施:①建筑物及室外电力设施的直击雷防护,②高压线路的雷电过电压防护,③低压配电及弱电设备的过电压防护,④屏蔽,⑤等电位连结。经过几年的实地验证,防雷措施初见成效。

Through the investigation and research about the electromechanical equipments in the Xinghe highway tunnel frequently struck by lightning in the Taihang Mountain Area,considering the geographical and meteorological environment of Xinghe and the in-situ test,the measures to protect against direct lightning flashes and lightning electromagnetic impulses are discussed from the following five aspects： （1） protection of structures and power facilities against direct lightning flashes,（2） protection of high-voltage lines against over-voltage caused by lightning,（3） protection of low-voltage electrical installations and electronic installations against over-voltage,（4） shielding,（5） equipotential bonding.The practice of several years proved that these measures are applicable.