| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring method and an apparatus capable of electrical logging through the use of holes bored by testing equipment for ground survey such as a Swedish type sounding testing equipment capable of easily boring small-diameter holes in the ground and provide a low-cost and highly efficient survey method capable of reducing boring excavation costs shortening the time required for excavation. SOLUTION: An electrode sonde for measurement in which a plurality of electrodes are arranged is inserted in a small-diameter hole excavated for ground test. A specific resistance measuring device is used to select electrodes by a computer's instructions and measure apparent specific resistance at a plurality of electrode intervals. On the basis of computations by the computer through the use of measurement data in which the depth of center points are the same at different electrode intervals, the electrical resistivity of the ground at the depth of an electrode center point is determined and displayed in the low-cost and highly efficient survey method. COPYRIGHT: (C)2008,JPO&INPIT
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