Enayam Port

Tamil Research Institute
RAPID TECHNO-ECONOMIC FEASIBILITY REPORT FOR
DEVELOPMENT OF COLACHEL PORT AT TAMILNADU
FINAL REPORT
H=Design Wave Height
K D =Stability Coefficient
=
=Mass density of Water
cot α=Armour Slope (H/V)
For randomly placed concrete armour units, Hudson formula has been rewritten by CIRIA as presented in the next
equation:
Using the significant wave height, Hs(m) and the nominal diameter of the unit, Dn (m).
The value KD of the Stability Coefficient is KD=15 for accropods in the trunk of the breakwater portion and KD=6 for
cubic blocks. Van der Meer formulas have been also considered for the design of the armour layer.
The main rubble-mound breakwater design is divided in three parts depending on the wave height. The east
breakwater, which closes the container terminal, natural rock armour has been defined. Next paragraphs show each
section main characteristics:
• First Section:
It is the deepest part of the rubble-mound breakwater (around the depth of -15 m to -11m ). The wave
height has been taken from the point of interest P3 and P2, with Hs= 5 m. Accropods of 3 m 3 have been
used for this section
Figure 119: Rubble-mound section (3 m 3 accropods)
• Second section:
CP1832-FR-CP-FinalReportRevised-Report-Ed1.docx 131
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