Transcript
Page 1: Bridges Middle East - Rick Haggett - Qatar Bahrain Causeway Management

Qatar-Bahrain Causeway Project

Bridges Middle East Conference 2009

Page 2: Bridges Middle East - Rick Haggett - Qatar Bahrain Causeway Management

2Introduction

• Bridges in the region

• Qatar-Bahrain Causeway

(the latest & greatest)

• Design and construction issues

• Introduction of rail

• Technical challenges

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3

Bridges in the Region

Bridges Middle East Conference 2009

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4Bridges in the Region

Typically:

• Water crossings

• Connect population centres

• Access key infrastructure

Notably:

• Abu Dhabi

• Dubai

• Bahrain

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5Bridges in the Region

Drivers:

• Economic growth

• Population growth

• Urban expansion

• Development of major

infrastructure

• Increasing traffic

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6Bridges in the Region

Abu Dhabi

Hodariyat BridgeSaadiyat Island Bridge (Sheikh Khalifa Bridge)

Sheikh Zayed Bridge

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7Bridges in the Region

Dubai

Garhoud Bridge Palm Jebel Ali Crescent Bridges

Dubai

Metro

Sheikh Rashid bin Saeed Crossing (6th Crossing)

Business Bay Bridge

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8Bridges in the Region

Bahrain

Sheikh Isa Causeway

Sheikh Khalifa bin Salman Bridge

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9Bridges in the Region

Sitra Causeway

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10Bridges in the Region

King Fahd Causeway

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Qatar-Bahrain Causeway

Bridges Middle East Conference 2009

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12Qatar-Bahrain Causeway

Project Overview• 40km marine causeway

• 2 lane highway in each direction• Adjacent high-speed rail facility

• 2 dredged navigation channels

• 2 high level arch bridges• 23km bridges / viaducts

• 17km embankments• 2 rest area islands

• Interchanges, tolling, border facilities

QBC

Qatar

Bahrain

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13Qatar-Bahrain Causeway

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Design and Construction Issues

Bridges Middle East Conference 2009

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15Design and Construction issues

• Pre-cast solution adopted:

– To limit offshore operations

– To maintain control over quality & safety

• Design closely linked to construction methods

• Design-Build approach adopted

• Allows fast-tracking of schedule

Large Marine Site

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16Design and Construction issues

Material:

• Volumes required

• Need to ensure

– Consistent quality

– Reliability of supply

• High import content

• Marine Borrow

• Durability considerations

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17Design and Construction issues

Concrete Durability: Options

• Stainless steel

• Corrosion inhibitor

• Coating

• Cathodic Protection

• Extent of splash zone

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18Design and Construction issues

Eurocode:

• One of the first projects to use

• Europe-wide code for bridge design

(road/rail) from 2010

• Option of factored loads or 3rd party checks

• Reliability & Consequence Classes

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19Design and Construction issues

Influenced by:

• Archaeology (Qatar)

• Competing land use (Bahrain)

• Stakeholder Requirements

Alignment at Landing Points

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20Design and Construction issues

Qatar Landing Point

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21Design and Construction issues

3 km

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22Design and Construction issues

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23

Introduction of Rail

Bridges Middle East Conference 2009

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24Introduction of Rail

Concept design:

• Road only

• Twin deck viaducts

• 80 m viaduct spans

• Cable-stay bridges over

Navigation Channels

Introduction of Rail

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25Introduction of rail

• Larger vertical and horizontal loads

– Freight

• Limitation on gradient and horizontal curvature

– High-speed passenger

• Extended Schedule

Impact of Rail

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26Introduction of rail

Resultant changes to concept design:

• Vertical and horizontal alignments revised

• Length of viaduct increased

• Stronger, stiffer structures

• Arch bridges replaced cable-stayed

• Closer pier spacing

• Twin road decks combined

• Navigation Channel relocated

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Technical Challenges

Bridges Middle East Conference 2009

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28Technical challenges

Environmental

• Zero impact on hydraulic flows

• Extensive baseline measurements

• Ongoing Monitoring

• Constraints on construction methods

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29Technical Challenges

Quality & Safety

• Remote sites

• Working at height

• Heavy lifts

• 24/7 working

• Cost-driven schedule

• Motivating the workforce

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30Technical Challenges

Rail Issues

• Axle Load

• Speeds

• Height Clearance

• Emergency Escape

• Maintenance Access

• Bahrain Network

• Qatar Network

• GCC Network

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31Technical challenges

Dredging of Navigation Channels• Unsuitable material• Creative disposal

Ship impact on Main Bridges• Designed to deflect• Seismic resistant• Visual Impact• Technical challenges

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32Technical challenges

Settlement of Embankments

• Soil improvement & testing

• Deferred rail solution

• Ballasted track

High Voltage Interconnect

• Three 220 kV circuits

• Two 400 kV circuits

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33Concluding remarks

• Rich heritage of major bridges in the GCC

• The Qatar Bahrain Causeway will enrich this

heritage

• First high-speed rail crossing

• Numerous challenges to overcome

• A landmark project for the Region

In Conclusion

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34

Thank You


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