| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a grounding method in a tunnel construction, capable of reducing grounding wire cost and grounding work cost and superior also in terms of electric safety and security because ground resistance can be confirmed in an installation location of an in-pit cubicle which moves forward at any time in accordance with extension of a construction distance. <P>SOLUTION: In a grounding work method in construction of a tunnel which includes any of at least rails 12, steel sleepers 14, steel segments 10, and steel supports in a tunnel pit, a grounding point prepared in the outside of the tunnel is electrically connected to any of the rail 12, the steel sleeper 14, the steel segment 10, and the steel support, to form a grounding pole, and the ground resistance of the grounding pole is continuously measured in accordance with the progress of construction of the tunnel. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
