Abstract
Wave propagated into soft rock is not completely described by purely linear elastic theory. Through spectrum analysis of wave, one can see that several frequencies are selected by the ground. ME2i uses this method to check grouting, piles a.s.o. The Mol experiment (on Radioactive Waste Disposal) aims to prove that little changes into heated clay can be detected by `frequential seismic`. A cross-hole investigation system has been installed and tests have been performed for two years with a shear-hammer named MARGOT built to work inside horizontal boreholes: - Before heating the tests show the same results every time: . main frequency at 330 hertz; . maximal frequency at 520 hertz; - During heating: . the rays at 330 and 520 hertz disappear; . The frequencies in the range 100 - 300 hertz are prevailing; - After heating spectra have again their original shape. These results show that the effect is clear around an heated zone. The next steps should be: - Interpretation with computer`s codes treating of wave propagation into a viscoelastic body; - Experimentations: . at the opening of a new gallery; . on big samples; . on granites and salt. 9 refs., 4 appendices.
Citation Formats
Sloovere, P de.
Study of clay behaviour around a heat source by frequency spectrum analysis of seismic waves; Etude du comportement de l`argile autour d`une source de chaleur par analyse en frequence de l`onde sismique.
CEC: N. p.,
1993.
Web.
Sloovere, P de.
Study of clay behaviour around a heat source by frequency spectrum analysis of seismic waves; Etude du comportement de l`argile autour d`une source de chaleur par analyse en frequence de l`onde sismique.
CEC.
Sloovere, P de.
1993.
"Study of clay behaviour around a heat source by frequency spectrum analysis of seismic waves; Etude du comportement de l`argile autour d`une source de chaleur par analyse en frequence de l`onde sismique."
CEC.
@misc{etde_10144702,
title = {Study of clay behaviour around a heat source by frequency spectrum analysis of seismic waves; Etude du comportement de l`argile autour d`une source de chaleur par analyse en frequence de l`onde sismique}
author = {Sloovere, P de}
abstractNote = {Wave propagated into soft rock is not completely described by purely linear elastic theory. Through spectrum analysis of wave, one can see that several frequencies are selected by the ground. ME2i uses this method to check grouting, piles a.s.o. The Mol experiment (on Radioactive Waste Disposal) aims to prove that little changes into heated clay can be detected by `frequential seismic`. A cross-hole investigation system has been installed and tests have been performed for two years with a shear-hammer named MARGOT built to work inside horizontal boreholes: - Before heating the tests show the same results every time: . main frequency at 330 hertz; . maximal frequency at 520 hertz; - During heating: . the rays at 330 and 520 hertz disappear; . The frequencies in the range 100 - 300 hertz are prevailing; - After heating spectra have again their original shape. These results show that the effect is clear around an heated zone. The next steps should be: - Interpretation with computer`s codes treating of wave propagation into a viscoelastic body; - Experimentations: . at the opening of a new gallery; . on big samples; . on granites and salt. 9 refs., 4 appendices.}
place = {CEC}
year = {1993}
month = {May}
}
title = {Study of clay behaviour around a heat source by frequency spectrum analysis of seismic waves; Etude du comportement de l`argile autour d`une source de chaleur par analyse en frequence de l`onde sismique}
author = {Sloovere, P de}
abstractNote = {Wave propagated into soft rock is not completely described by purely linear elastic theory. Through spectrum analysis of wave, one can see that several frequencies are selected by the ground. ME2i uses this method to check grouting, piles a.s.o. The Mol experiment (on Radioactive Waste Disposal) aims to prove that little changes into heated clay can be detected by `frequential seismic`. A cross-hole investigation system has been installed and tests have been performed for two years with a shear-hammer named MARGOT built to work inside horizontal boreholes: - Before heating the tests show the same results every time: . main frequency at 330 hertz; . maximal frequency at 520 hertz; - During heating: . the rays at 330 and 520 hertz disappear; . The frequencies in the range 100 - 300 hertz are prevailing; - After heating spectra have again their original shape. These results show that the effect is clear around an heated zone. The next steps should be: - Interpretation with computer`s codes treating of wave propagation into a viscoelastic body; - Experimentations: . at the opening of a new gallery; . on big samples; . on granites and salt. 9 refs., 4 appendices.}
place = {CEC}
year = {1993}
month = {May}
}