crane loads as they affect wharf design€¦ · example super post-panamax crane dimensional...
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Crane Loads As They Affect Wharf Design Crane Loads As They Affect Wharf Design
Presented by
Dennis Padron, Executive Vice President, HPA
AAPA Facilities Engineering SeminarJacksonville, Florida 11-13 January 2006
Presented by
Dennis Padron, Executive Vice President, HPA
AAPA Facilities Engineering SeminarJacksonville, Florida 11-13 January 2006
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Types of Cranes
• Container Gantry
• Dry Bulk Gantry
• Mobile
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Typical Container Gantry Crane
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Typical Dry Bulk Unloader
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Typical Dry Bulk Loader
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Typical Mobile Crane
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Types of Wharf Structures
• Gravity• Pile Supported
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Typical Gravity Wharf Structure
• Cost relatively insensitive to crane loading
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Port Salalah Container Terminal, Oman
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Typical Pile Supported Wharf Structure
• Cost sensitive to crane loading
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Pile Supported Pier
• Cost very sensitive to crane loading
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Crane Characteristics Needed for Design
• Dimensional• Loading
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Crane Dimensional Characteristics
• Gage (spacing between rails)
• C – to – c distance between corners
• Number of wheels per corner
• Spacing of wheels
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Crane Loading Characteristics
Maximum Load Per Corner• Operating Condition
– Water Side Vertical
– Land Side Vertical
– Horizontal
• Extreme Condition
– Water Side Vertical
– Land Side Vertical
– Horizontal
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Example Super Post-Panamax Crane Dimensional Characteristics
Characteristic Jebel Ali, Dubai Doraleh, Djibouti
• Gage (spacing between rails)
42 30.48
• C – to – c distance between corners
14.1 15.5
• Number of wheels per corner
8 8
• Spacing of wheels 1.3 1.2
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Example Super Post-Panamax Crane Loading Characteristics
Maximum Load Per CornerLoad
Jebel Ali, Dubai Doraleh, Djibouti
• Operating Condition
– Water Side Vertical, kN
– Land Side Vertical, kN
– Horizontal, kN
11,200
9,600
800
8,400
6,800
400
• Extreme Condition
– Water Side Vertical, kN
– Land Side Vertical, kN
– Horizontal, kN
12,000
12,000
2,100
10,400
8,960
840
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Crane and Wharf Cost vs. Rail Loading
Rail Loading
Cos
t
Rail Loading
Cos
t
Pile Supported
Gravity
WHARF COSTCRANE COST*
* For given crane performance requirements
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Crane + Wharf Cost vs. Rail Loading
Rail Loading
Cos
t
Pile Supported
Gravity
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Modifying Existing Wharves
• Deepening issues• Crane load issues• Fender system• Mooring system• New code requirements
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Berth Deepening
• Reduces Global Stability
• Reduces Local Stability
• Reduces Pile Embedment Capacity
• Reduces Pile Structural Capacity
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Global Stability
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Local Stability
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Pile Capacity
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Crane Load Issues
• Increased reach
• Increased lifting capacity
• Increased weight
RESULTRESULT
• Increased rail loading
• Increased tie-down forces
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APM Port Elizabeth Container Terminal
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APM Port Elizabeth Container Terminal
• Upgrading Requirements
– 52 ft water depth
– 250 ton steel piles
– 50 kips per ft rail load
– 165 ton bollards @ 40 ft
– Fender system for Super Post-Panamax vessels
– Seismic zone 2
• Existing Features
– Constructed ca. 1970
– 40 ft water depth
– 50 ft wide platform
– 30 ton timber piles
– 20 kips per ft rail load
– 100 ft rail gage
– 500 psf deck live load
– 85 ton bollard @ 120 ft
– Minimal timber/rubberfender system
– No seismic criteria
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APM Port Elizabeth Container TerminalExisting Wharf Structure
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APM Port Elizabeth Container TerminalKing Pile Cut-Off Wall
KING PILE – SECTION
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APM Port Elizabeth Container TerminalCrane Rail Capacity Increase
• Same Location as Existing Rails
• Landward of Existing Rails
• Seaward of Existing Rails
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APM Port Elizabeth Container TerminalNew Rails Same Location as Existing Rails
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Howland Hook Container Terminal
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Howland Hook Container Terminal
• Existing Features
– Constructed ca. 1970
– 35 ft water depth
– 67 ft wide platform
– concrete and steel piles
– 20 kips per ft rail load
– 50 ft rail gage
– 500 psf deck live load
– 85 ton bollard @ 88 ft
– 15”φ rubber cylinder fender system
– No seismic criteria
• Upgrading Requirements
– 52 ft water depth
– 300 ton steel piles
– 42 kips per ft rail load
– 100 ft rail gage
– 100 ton bollard @ 44 ft
– Fender system for SuperPost-Panamax vessels
– Seismic zone 2
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Howland Hook Container TerminalExisting Wharf Structure
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Howland Hook Container TerminalUpgraded Wharf Structure
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