placed between Profiles 1 and 3. Core-Locs were placed according to the meth-
od given by Melby and Turk (1995).
The number of Core-Loc units placed on the breakwater, or density of units,
was based on the equation:
2
N
(2)
3
V
A
where N is the number of units in a given area, A is the section area, V is the
armor unit volume, is the packing density coefficient which is dependent upon
armor layer thickness and armor layer porosity. Armor layer thickness is equal
to about 0.92 of the respective Core-Loc leg length and the average armor layer
porosity is about 60 percent. Core-Loc is a relatively new armor unit and tests
are ongoing to determine optimal and constructable placement density of the
units. For this stability study, was purposely unspecified so that each model
armor placement would be a natural coverage and not exceed prototype construc-
tion limitations. For the tests conducted, ranged from 0.55 to 0.63 depending
on the base area covered and variance due to the random nature of the packing.
Reporting Model Observations
Visual inspections were made during and after wave action on the structure.
Because Core-Locs are placed in one layer, less than 2 percent displacement by
unit count was desired.
13
Chapter 2 The Model
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