地铁车站设备接地线路设计探讨

Earthing Circuitry Design for Metro Station Equipment

为降低地铁车站内的接触电压、跨步电压、设备的对地电压,防止过电压、静电以及电磁感应的影响,针对地铁车站设备接地要求,介绍地铁车站接地形式的选择和接地敷设方案的设计。推荐地铁车站采用以敷设水平接地网为主、换土和添加降阻剂为辅的接地方案,并结合实例进行说明。

For decreasing the contact-voltage,pace-voltage and equipment＇s drawing voltage to the ground,preventing the influence of over-voltage,static electricity and electromagnetic induciton,according to the grounding requirements of metro station,this paper introduces the selection of grounding form,the design of earthing laying project,recommends a concept that the horizontal ground mat be give priority to,the soil be displaced and friction reducer be appended for complement.This concept is testified with examples.