高土壤电阻率区域地网设计制作与测试试验

Grounding Grid Design and Test in Soil High-resistivity Area

结合机场自动气象观测场实例,介绍了高土壤电阻率区域采用离子接地极深井埋设和传统接地相结合的地网设计,详细分析了地网施工步骤及注意问题。在地网施工过程中,进行了离子接地极数量与地网接地电阻之间关系的测试试验,将实测接地电阻值与厂家宣称的理论计算电阻值进行了比较,并采用最小二乘法中添加趋势线的方法对试验曲线进行拟合,得到接地电阻值与离子接地极关系的数学表达式,同时对结果存在的问题进行了分析,可为其他高土壤电阻率区域的地网设计制作提供参考。

Combining by the automatic meteorological phenomena observation fiehl of Lnngdongbao Airport in Guiyang,this paper introduced the grounding grid design of soil high-resistivity area which adopted the deep buried ion grounding electrode in ground and the combination of traditional grounding methods. The grounding construction steps and problems in accordance with the design method were analyzed in detail. In the process of network constntction,an testing experiment of the relationship was performed between the number of ion grounding electrode and grounding resistance. The resuhs of actual measuring grounding resistance and the theoretical calculative grounding resistance which was alleged by the manufacturers,were analyzed. The experimental curves were fitted with the adding trend line of least square method. It comes to conclusion that the mathematical ,＇elation between the number of ion grounding electrode and grounding resistance,and the existing problems of the resuhs are analyzed. It can provide references for the grounding grid design and test in other soil high-resistivity area.