possible solutions before and immediately after earthquake ...
possible solutions before and immediately after earthquake ...
possible solutions before and immediately after earthquake ...
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RELATIVE DISPLACEMENT (mm)<br />
TEMPERATURE (°C)<br />
POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER<br />
EARTHQUAKE<br />
PROF. CLAUDIO MODENA<br />
Borehole rod extensometers EM_A / EM_B<br />
VERTICAL DISPLACEMENT, MULTI-BASE EXTENSOMETERS EM_A/EM_B<br />
30.00<br />
0.45<br />
0.35<br />
28.00<br />
26.00<br />
0.25<br />
24.00<br />
0.15<br />
0.05<br />
-0.05<br />
-0.15<br />
10/03/04 16.00<br />
09/04/04 10,30<br />
12/05/04 15,40<br />
09/06/04 15.10<br />
07/07/04 10.50<br />
06/08/04 15.40<br />
07/09/04 15.30<br />
05/10/04 09.38<br />
09/11/04 16.40<br />
13/12/04 15,00<br />
19/01/05 11,30<br />
08/03/05 10,00<br />
12/04/05 12.30<br />
17/05/05 09.05<br />
22/06/05 10.00<br />
29/07/05 15.30<br />
08/09/05 00.00<br />
22.00<br />
20.00<br />
18.00<br />
16.00<br />
14.00<br />
EM-A BASE1<br />
EM-A BASE2<br />
EM-A BASE3<br />
EM-B BASE1<br />
EM-B BASE2<br />
EM-B BASE3<br />
TEMPERATURE<br />
-0.25<br />
12.00<br />
-0.35<br />
DATE<br />
It is visible a general slight tendency to “open” (positive values are related to increase in terms of<br />
distance between the measuring fixed points): however, the recorded data present reduced values. Four<br />
over six of the borehole rod extensometers measuring heads did not detect significant variations: some<br />
remarkable residual displacement are noticed, on the contrary, on base 3 of EM_A (5 m deep) <strong>and</strong> on<br />
base 1 of EM_B (15 m deep).<br />
10.00<br />
POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER EARTHQUAKE
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