Environmental Engineering Reference
In-Depth Information
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FIGURE 4.19
Schematic of the function of the Interfels deflectometer.
Note
: 1. shear zone; 2. transducer; 3. deflectometer head
with tension; system from the steel wire; 4. steel wire; 5. electrical readout; 6. optical or acoustical alarm. (From
Silvera, J.F.A.,
Proceedings of the 1st Congress
, Brasileira de Geologia de Engenharia, Rio de Janeiro, August, Vol.
1, 1976, pp. 131-154. With permission.)
reached where the rod stops during lifting, indicating the bottom of the failure surface.
Another rod is lowered from the ground surface until it stops, indicating the location of
the top of the failure zone.
