| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a highly reliable data without requiring any test work by determining the resistance per unit length using a current between current electrodes and a voltage between potential electrodes under a state where an electrode fixing body are arranged in an improved body to be measured. SOLUTION: An improving body 11 is built in the ground 21 and inserted with an electrode fixing body 3. A pair of current electrodes 4a, 4b fixed to the electrode fixing body 3 are then conducted and a current I flowing between the current electrodes is measured. On the other hand, potential difference V between potential electrodes 4c, 4d fixed to the electrode fixing body 3 is measured. Subsequently, the resistance R per unit length is determined using the measured current I between the current electrodes and the potential difference V between the potential electrodes. Assuming the distance between potential electrodes 4c, 4d is d, R=V/(I.d) is satisfied. Progress of the improving body 11, e.g. diameter, is calculated with reference to the relation between the resistance per unit length and the progress of the improving body 11 using the resistivity of natural ground as a parameter.</p> |
