Paralleling to the longitudinal direction of the revised body which is created in

摘要

PROBLEM TO BE SOLVED: To provide high-reliability estimated information about the finished shape of an improved body. ;SOLUTION: An electrode fitting body 14 is installed for estimating a diameter DX. The fitting body 14 is provided with current electrodes PI and potential electrodes PV. An arithmetic means 20 determines the measured resistance value Rreal per unit length of an improved body 12 from the potential difference V when a current I flows between the current electrodes PI. The relation between the resistance value R and diameter D per unit length of a simulated improved body is obtained based on the specific resistances ρ1 of improved bodies of multiple kinds and the specific resistance ρ2 of the natural ground by the two-dimensional axisymmetric finite element method with the ratio between the specific resistances ρ1, ρ2 used as a factor. When the measured specific resistance ρ1 real of the improved body 12 and the measured specific resistance ρ2 real of the natural ground 10 are obtained, the factor which is the ratio between the specific resistances ρ1, ρ2 is selected from the ratio between them, thereby the relation between the resistance value R and diameter D of the simulated improved body is specified, and the diameter DX can be estimated by collating the measured resistance value Rreal with this relation.;COPYRIGHT: (C)2000,JPO