铁路斜拉桥防雷接地应用研究

Research on lightning protection and integrated grounding application of railway cable-stayed bridge

特大桥作为铁路的控制性工程,在整条铁路线建设中起着非常重要的作用。然而,受地形等其他自然因素的影响,桥梁极易受到雷击的侵害,雷击可能会损坏主塔顶部和桥面的电气设备,甚至可能破坏主塔或斜拉索的主体结构。本文以南方某铁路为例,提出了铁路斜拉桥的防雷接地方案,着重介绍了直击雷防护和铁路综合接地系统的设计,同时简要说明了其他电气设计,对铁路斜拉桥的防雷接地工程具有较好的示范作用。

As a railway control project,specially long span bridge plays a very important role in the whole railway construction. However,under the influence of other natural factors such as topography,bridges are vulnerable to lightning strikes,which may damage the electrical equipment at the top of the main tower and the bridge surface,or even damage the cable or main structure of the main tower. Taking a railway in the south as an example,this paper puts forward the lightning protection grounding scheme of railway cable-stayed bridge,and introduces the design of direct lightning flash protection and railway integrated grounding system. At the same time,it briefly describes other electrical designs,and has a good demonstration effect on the lightning protection grounding project of railway cable-stayed bridge.