多角辐散地极技术在高电阻率地区的应用

在高电阻率地区,建造符合要求且经济实用的地网一直是防雷工程施工的难点。因为组成地网的接地极的形状关系到材料利用效率和施工难易程度。提出了"多角辐散地极"的概念,设计制作了多角辐散地极,并选择了3个不同的地域环境,对这一设计技术进行了试验。通过与普通地网的比较,证明了在高阻率地区多角辐散地极组成的地网优于普通地网。通过对不同安装距离,不同降阻剂投放量的比较,确定了多角辐散地极的最佳安装方法,并根据试验测量的数据计算出并联系数,得出工程量的估算方法。

Application of Polygonal Divergent Earthing Electrodes in Areas with High Soil Resistance

It is always difficult for a lightning protection project to build a qualified and economical earthing device for the areas with high soil resistance. Considering the relation of the shape of earthing electrodes to the utilization efficiency of materials and the difficulty in construction,the polygonal divergent earthing electrode technique is presented.The experiments on the technique were conducted at three sites with different environments.The comparison with common earthing devices indicates that the polygonal divergent earthing electrode technique is superior in the areas with high soil resistance.Comparisons are also made between the different installation distances and different dosages of resistance reducing agents.Thus,the optimal installation method is found out;the parallel connection coefficient is calculated on the basis of the experiment data;and the estimating method of engineering work load is obtained.