20100212 Port of Ehoala – Design of Navigation Works updated [Compatibility Mode]
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Transcript of 20100212 Port of Ehoala – Design of Navigation Works updated [Compatibility Mode]
Building on the Past, Respecting the Future
Port of Ehoala Design of Navigation Works
Trevor Elliott, P.Eng.Brent Sumner, P.E.
Building on the Past, Respecting the Future
Presentation Outline• Introduction
– Ilmenite export– Harsh wave environment
• Port Layout
• Navigation Plan– Design vessels– Channel alignment– Design depths & dimensions
• Aids to Navigation– Range towers (leading lights)– Beacons– Buoys
• Closing Remarks
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Building on the Past, Respecting the Future
Introduction – Project Location
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Building on the Past, Respecting the Future
Ilmenite Export
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• Black Sand to White Pigment
Building on the Past, Respecting the Future
Why navigation works are important
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Building on the Past, Respecting the Future
Fausse Baie des Galions (full of reefs)
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Building on the Past, Respecting the Future
Port Layout
• Main Elements– Breakwater
– Quay
– Dredging & reclamation
– Navigation works
– Coastal structures
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Building on the Past, Respecting the Future
Design Vessels
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Bulk Carrier 20,000 DWT 60,000 DWT
Length overall (LOA) 155 m [509 ft] 225 m [738 ft]
Beam (B) 23 m [75 ft] 32.2 m [106 ft]
Loaded Draft (T) 9 m [30 ft] 12.7 m [42 ft](10 m @ 2/3rd laden)
Building on the Past, Respecting the Future
Channel Alignment
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Building on the Past, Respecting the Future
Dredge DepthsBerth Area Navigation Channel Turning Area
LAT (below MSL) 0.3 0.3 0.3Loaded Draft 12.7 12.7 10Gross UKC 2.45 (20%) 3.7 (30%) 2.9 (30%)
Survey Tolerance 0.3 0.3 0.3MSL DEPTH ‐15.75m [52 ft] ‐17.0m [56 ft] ‐13.5m [44 ft]
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Building on the Past, Respecting the Future
Dimensions• Departure Channel
– Width based on PIANC (1997)– Bulkers: poor manoeuvrability
– One-way = 4.5·B– Width = 150 metres (492 ft)
• Turning Area– Tug assistance (2 @ 45 tonne bollard pull each)
– 1.5·LOA (ship’s anchor + tugs)– Diameter = 340 metres (1,115 ft)
• Tested in real-time navigation simulator
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Building on the Past, Respecting the Future
Navigation Simulations - Swept Track Plot
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Building on the Past, Respecting the Future
Aids to Navigation
• Designed to IALA guidelines, Region A• Principal components
– 4 Range Towers (Leading Lights)– 6 Fixed Beacons – 1 Special Mark, 5 Lateral Marks– 5 Lateral Mark Buoys – 2 Can, 3 Nun– 2 Special Mark Buoys– 3 Cardinal Buoys
• Port Control Tower
• Evaluated in navigation simulations
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AB
Building on the Past, Respecting the Future
Range Towers• Two sets of ranges
– Outer on entering bay– Inner on approach to berth
• Designed to USCG and IALA guidelines
• Dayboards + leading lights• Steel monopole and
concrete mat foundation– Largest tower 47m (154 ft tall)
• Cyclone wind speed– Gust 241 km/h (130 knots)
• Corrosion protection system• Aviation safety (light + paint)
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Building on the Past, Respecting the Future1515
R
M
CW
Range Towers
Building on the Past, Respecting the Future
Fixed Beacons• Quay structure (3)
– Primary berth• Manifold - ATEX Zone 2
– Secondary berth
• Groin (1)• Breakwater (2)
– Roundhead– Trunk at entrance to
secondary harbor
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Building on the Past, Respecting the Future
Buoys• Navigation buoys
– Cyclone waves Hs=8m/26ft– Diameter 2.5m/8ft– Conventional lantern optics
• Lateral mark buoys (5)– Located at outer limits of turning
area– Gated Pair midway either side of
departure channel– End of turn marking reef
• Cardinal buoys (3)– 1km opening at center of bay
Mark named side of buoy• Special mark buoys (2)
– End of dredge pocket– ATEX Zone 2
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Building on the Past, Respecting the Future18
Aids to Navigation - Plan
Building on the Past, Respecting the Future
Closing Remarks• Construction completed July 2009• Handed over to port operator• 60 vessels in first 6 months• Ilmenite export
– Largest: 55,000 DWT bulk carrier
• Fuel delivery– Largest: 47,000 DWT tanker– Regional distribution hub
• Container traffic– Feeder vessels up to 1,100 TEU
• Other– Patrol boat, oceanographic vessel– Shiploader delivery vessel
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Building on the Past, Respecting the Future
Thank You
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