基于防渗层的水下立体接地网设计与施工  

Design and construction of underwater three-dimensional grounding grid based on impervious layer

作　　者：宋海峰 蒋佳杰 郑智勇 高海欧 SONG Hai-feng;JIANG Jia-jie;ZHENG Zhi-yong;GAO Hai-ou(State Grid Xinyuan Company LTD.Huilong Branch,Nanyang 473000,China;Huadong Yixing Pumped Storage Power Co.,Ltd.,Yixing 214201,China;Changsha Kezhi Lightning Protection Engineering Co.,Ltd.,Changsha 410001,China)

机构地区：[1]国网新源控股有限公司回龙分公司,河南南阳473000 [2]华东宜兴抽水蓄能有限公司,江苏宜兴214201 [3]长沙科智防雷工程有限公司,湖南长沙410001

出　　处：《水电站机电技术》2019年第S01期9-11,76,共4页Mechanical & Electrical Technique of Hydropower Station

摘　　要：河南回龙抽水蓄能电站上水库土壤电阻率高,土地面积狭小。本次设计采用以水平接地体为主的立体双层接地网进行降阻。第一层接地网以防渗层为基础,在防渗层下的石土上,采用水平接地极,在库底形成30mx30m的接地网网格,并用导电水泥砂浆覆盖固定。第二层接地网在防渗层上面的蓄水里做接地网,并与第一层接地网并联。测量结果表明,本次设计的接地网满足要求,达到了预期的设计效果,并对同类型的接地系统设计,具有较大的参考价值。For the upper reservoir of The Huilong Pumped Storage Power Station in Henan,the soil resistivity is high and the area is small.In this design,a three-dimensional two-layer grounding grid mainly composed of horizontal grounding electrodes is used to reduce the resistivity.The first layer is based on an impervious layer.Horizontal grounding electrodes are set on the rock-earth layer below the impervious layer to form a 30mx30m grounding grid at the reservoir bottom.The grid is covered and fixed with conductive cement mortar.The second layer acts as a grounding grid in the aquifer above the impervious layer and is connected in parallel with the first layer.The measuring results show that the designed grounding grid meets the requirements,achieves the expected design effect and is of great reference value for the design of grounding system of the same type.

关 键 词：防渗层 立体接地网 土壤电阻率 接地电阻 

分 类 号：TU856[建筑科学]