through the interface and the body of IFFS. Any observable movement of the IFFS will
be documented and recorded on video. The wall will be measured for any lateral
deflection at up to eight different locations in order to determine whether it is sound
under increasing static loading. Measurements in terms of average volumetric quantity
per unit of time will be used to calculate amounts of water flowing under or through the
barrier. This will allow the engineer to determine how much water may become
impounded, for a given duration, behind the wall.
7.0 Wave-induced Hydrodynamic Load Testing Protocol
The purpose of wave-induced dynamic load testing is to observe the structural response
of the IFFS under hydrodynamic loading conditions. Typical hydrodynamics failures of
temporary structures (Class C-i) include material failure or fatigue, fill loss, wall sliding
or overturning, and deformation. The protocol specifies that packets of monochromatic
waves with a wave period of T = 2.0 seconds be generated to impinge against the barrier.
The wave tests will be conducted at two different calm water depths: 66.7% x h and 80%
x h , where h is design water depth for the structure or 3.5 ft, whichever is lower. At
66.7% x h waves of approximately 3 in height (measured from trough to crest) will be
generated continuously for a period of 7 hrs. The following day waves ranging from 7
in. to 9 in. (measured from trough to crest) will be allowed to impact the structure for 30
min in three ten minute increments. Afterwards, the wave height will range from 10 in.
to 13 in. and will be allowed to impact the structure for one ten-minute increment. The
water will then be brought to a level of 80% x h and the above tests will be repeated
(Attachment 2). At the end of each ten minute increment of wave testing (excluding the
7 hrs of 3 in. waves), the basin will be stilled for up to 45 minutes to allow the waves to
dissipate.
The seepage observations and displacement measurement as described in Section 6.0 will
also be done during hydrodynamic testing. As waves grow in height, a certain portion of
the wave spills over the IFFS, depending on frontal geometry, porosity, and roughness.
This quantity of water can have a significant impact on the volume of seepage.
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