| Title |
Comparison Analysis of Soil Structure Methods for Deciding the Position of a Deeply Driven Ground Rod |
| Authors |
Ju-Hong Eom ; Sung-Cheol Cho ; Tae-Hyung Lee ; Bok-Hee Lee |
| Keywords |
Dipole-dipole ; Wenner ; Resistivity ; Ground |
| Abstract |
Recently, there has been an increase of the use of ground system for lightning protection called deeply driven grounding electrode. In the case of deeply driven grounding electrode, the rod electrode is equipped perpendicularly and deeply, therefore, it has a benefit to have less restriction of place compared to mesh grid electrode. However, ground impedance is largely changed by the local earth resistivity, so it requires a detailed analysis of the ground structure when planning. The measurement of earth resistivity by existing Wenner"s method has been widely used, however, this method can not find out a change in the local ground resistance and it shows the result outwardly to be difficult to estimate exact depth. Therefore, this study analyzed the ground structure as 2-D image using 96 channels measurement facility and tried to analyze change in the local ground resistance and depth of the ground in order to design a deeply driven electrode effectively for lightning protection. It used Wenner alpha method, dipole-dipole method and Schlumberger method for 2-D image analysis of the ground resistivity and, based on it, the result was compared with the ground structure analyzed with the result using the CDEGS and Wenner 1-D method. |