ELECTRODE DEVICE FOR MEASURING RESISTIVITY OF BORING CORE

PURPOSE:To measure the resistivity of a boring core simply and accurately at a core sampling site. CONSTITUTION:A base part 10 and a cap part 30, which can be freely opened and closed, are provided. Paritioning members 14 and 34, wherein semicircular recess parts 12 and 32 covering about the half circumference of a core are formed, are arranged. Wire electrodes 18a, 18b and 38 are hooked on the recess parts 12 and 32 by using springs. When the cap part 30 is closed, a core inserting space is formed out of the recess parts 12 and 32. The base part 10 and the cap part 30 are formed into a box type and fixed with hinges at one side. The base part and the cap part can be tightened with fastners on the opposite side. It is recommended that the electric contact points among the wire electrodes 18a, 18b and 38 are closed when the cap part 30 is closed. Grooves 22 and 42, wherein the parts of the cross sections of the wire electrodes 18a, 18b and 38 can be embedded, are formed on the surface of the recess parts 12 and 32. The wiring electrodes 18a, 18b and 38 are provided into a V shape between the upper surfaces and the bottom parts on both sides of the recess parts 12 and 32 on the side of the base part 10 and provided so as to bridge over the recess parts 12 and 32 on the side of the cap part 30.