G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 7/13 (2006.01) G01V 3/26 (2006.01) E21B 47/08 (2006.01)
Patent
CA 2328513
The invention relates to a method of monitoring the diameter of columns made in the ground by jet grouting. In the method, a measuring instrument (14) is provided which is constituted by a tubular element (16) of length substantially equal to the length of the column (2), said tubular element being fitted with a plurality of emission electrodes (18) for creating an electric field, and with a plurality of measurement electrodes (18) for measuring the resulting potential differences; a reference borehole is made in the ground; an axial borehole (36) is made in the column (32) to be tested; said measuring instrument (16) is inserted in the borehole in said column and voltage measurements are performed at different depths; and said measurements are processed.
Compagnie Du Sol
Mccarthy Tetrault Llp
LandOfFree
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