| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems of a presently used ground rod that it is a rod or a plate having smooth surface, and since construction work is conducted by direct driving or by burying in a buried hole previously diged, much labor is required, acquisition of a low resistance value requires increase in cost, and an environment load such as noise is increased in cities. SOLUTION: This twist ground rod A is formed by twisting a steel or copper sheet or forming a twisted wing in a steel or copper rod, and by effectively utilizing pillar erection cars arranged by construction companies, the twist ground rod is directly rotated to bury and execute. The acquisition of a low resistance value is conducted by connecting relay twist ground rods for execution to obtain the specified value. The labor is reduced by utilizing widely used pillar erection cars, and reduction of cost and noise is achieved by enhancing efficiency of construction work. COPYRIGHT: (C)2003,JPO
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