用多重镜象计算二层土壤中矩形基础接地电阻

应用多重镜象法和矩量法得出了计算二层土壤基础接地电阻的代数方程式 ,并编制了相应的程序。计算结果与文献 1]、2 ]相比较 ,验证了方法及程序的正确性。用三个算例 ,研究了镜象电流 (电荷 )数对计算精度的影响。本方法较文献 1]、2 ]省内存、省机时且精度高 ,可对二层土壤矩形混凝土内水平接地网的接地电阻进行有效的计算

Calculation of Resistance of Rectangular Foundation Grounding Systems in Two-Layer Soil by Multiple-Images Method

The algebraic equation for calculation of resistance of rectangular foundation grounding systems in two-layer soil is developed by the multiple-image method and the moment method. The program to compute grounding resistance is made. A comparison study on the program with respect to the results in the literature ［1］、［2］ is performed to check the accuracy of the proposed methods. Three examples are given in this paper. The paper also probes the effect of the number of image current (charges) on the calculation accuracy. In comparison with the literature ［1］、［2］, the methods studied in this paper are memory-saving, time-saving and more accurate. They are an effetive approach for determining the grounding resistance of concrete rectangular foundation grounding systems in two-layer soil.