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19/06/2012 1 Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural PIANC SEMINAR Monday 11 th June at 14:00 BIGGER SHIPS – BIGGER PORTS Contents Port of Dover overview and requirements Increase in vessel sizes using the Port Design challenges Pier A - Extension Pier A - Fender Upgrade Pier A - Construction progress

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Page 1: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

1

Dover Harbour

Pier A

Extension and

Fender Upgrade

CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

PIANC SEMINAR

Monday 11th June at 14:00

BIGGER SHIPS – BIGGER PORTS

Contents

• Port of Dover overview and requirements

• Increase in vessel sizes using the Port

• Design challenges

• Pier A - Extension

• Pier A - Fender Upgrade

• Pier A - Construction progress

Page 2: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

2

Port of Dover - Overview

• Europe’s busiest and most successful ferry port

– Handles around £80 billion of trade each year

– Supports around 22,000 jobs locally

• Ferries arriving and departing approximately every 20 minutes.

• Continued development of the Port includes catering for longer, faster and

more efficient Ro-Ro vessels

Port of Dover - Location

Pier A

NORTH

Page 3: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

3

Pier A - Location

Pier A

Pier

Extension

Berth 3 NORTH

Eastern

Breakwater

Port of Dover Requirements & CGR Design Brief

• To cater for the projected increase in size of ferries in the near future.

• New vessels are in excess of 200m long.

• To improve operational safety of existing ferries using the Port and to

comply with the Port Marine Safety Code.

• A vessel simulation study by the Port of Dover and HR Wallingford

confirmed the feasibility of a pier

extension length of 40m.

• Piers to be extended to a length of

220m.

• Stern and side fender systems

to be upgraded to accommodate the

larger ferries.

Page 4: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

4

Existing Berth & Vessel lengths

Pier A

Berth 3

Berth 2

• DFDS/ D Class vessel 186m long and 28m beam

Longer Vessels

Pier A

Berth 3

Berth 2

• Spirit Class vessel 209m long and 34m beam

Page 5: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

5

Longer Vessels & Berth Extension

Pier A

Berth 3

Berth 2

• To comply with Port Marine Safety Code, a fixed construction/ installation is

required seawards of vessel bow

Design Issues

• To accommodate the large

design vessel, the following

issues (and many others) were

assessed in detail:

– Design vessel Displacement

Tonnage, LOA and hull profile

– Berthing arrangements

– Berthing angles and velocity

– Mooring line arrangements

– Fender positioning

– Position on the berth

– Accidental berthing criteria

Page 6: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

6

Options Assessment

• Options considered

– Dolphin supported on multiple piles

or large diameter piles

– Sheet piled or combi-wall cofferdam

– Concrete caisson

– Floating structure

• Factors influencing option selection

– Outline design feasibility

– Minimising disruption to port operations during

construction (keep 2 berth operational)

– Construction methodologies

– Budget estimates and construction cost

– Improvements to marine safety

– Mitigate the possibility of disruption to ferry

schedules (every 20 to 30 mins)

Pier Extension Design Overview

• Pier Extension

• 4m diameter tubular steel monopile

with reinforced concrete cap including

fender system and walkway bridge

• Piled deck extension and pile fenders

• Monopile fender system detailed design by

Ingenieurbüro Rossburger (FenderTeam)

Existing

Pier Head

4No. Pile Fenders Ф4m Monopile

Monopile

Fenders

28m Deck Extension 8m MP Head

Page 7: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

7

Pier Extension - Monopile

• Monopile is the prime

defence against

runaway vessel.

• Designed to resist 1500

tonne impact at

+10.5mCD.

• Significant design

criteria and is

anticipated to damage

vessel.

• Fendering provided to

protect vessels at lower

berthing velocities;

during normal &

accidental and breasting

loads.

Pier Extension – Monopile

Page 8: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

8

Pier Extension – Construction Progress

Fender Upgrade Design

• Larger vessels impose larger berthing energies

• Side and stern fenders upgraded

• Stern fenders limited by reaction capacity of existing berthing dolphins

• Parallel Motion Fenders selected at stern to accept multiple-deck vessels

without double impact

Pier

Extension

4No. New

Stern Fenders

11No. New

Side Fenders

Page 9: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

9

Stern Berthing Assessment

Self supporting

linkspan fingers

Stern Berthing Assessment

Self supporting

linkspan fingers

7m tidal

range

Page 10: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

10

Stern Berthing Assessment

Stern Fenders – Construction Progress

Page 11: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

11

Stern Fenders – Construction Progress

Side Fenders - Design

• Maintain existing berthing line

• Fit fenders within existing slots

and quay structure

• Limited to 300mm deflection

• Accommodate vessel belting

which varies from vessel to

vessel

• Arch fenders fixed to rear of

panel

• 11No. fenders, 2 different types

Page 12: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

12

Side Fenders - Supports

Side Fenders – Construction progress

Page 13: BIGGER SHIPS BIGGER PORTS - PIANC British Section · Dover Harbour Pier A Extension and Fender Upgrade CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

19/06/2012

13

Dover Harbour

Pier A

Extension and

Fender Upgrade

CULLEN GRUMMITT & ROE Consulting Engineers – Harbour, Civil and Structural

PIANC SEMINAR

Monday 11th June at 14:00

BIGGER SHIPS – BIGGER PORTS