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Qatar-Bahrain Causeway Project

Bridges Middle East Conference 2009


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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



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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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Drivers: Economic growth

Population growth

Urban expansion Development of major

infrastructure

Increasing traffic


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Abu Dhabi

Hodariyat BridgeSaadiyat Island Bridge (Sheikh Khalifa Bridge)

Sheikh Zayed Bridge


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Dubai

Garhoud Bridge Palm Jebel Ali Crescent Bridges

DubaiMetro

Sheikh Rashid bin Saeed Crossing (6th Crossing)

Business Bay Bridge


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Bahrain

Sheikh Isa Causeway

Sheikh Khalifa bin Salman Bridge


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Sitra Causeway


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King Fahd Causeway


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11

Qatar-Bahrain Causeway



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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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14

Design and Construction Issues



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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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Material: Volumes required

Need to ensure

Consistent quality

Reliability of supply

High import content

Marine Borrow Durability considerations


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Concrete Durability: Options

Stainless steel

Corrosion inhibitor

Coating

Cathodic Protection

Extent of splash zone


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Eurocode:

One of the first projects to use

Europe-wide code for bridge design(road/rail) from 2010

Option of factored loads or 3rd partychecks

Reliability & Consequence Classes


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Influenced by:

Archaeology (Qatar) Competing land use (Bahrain)

Stakeholder Requirements

Alignment at Landing Points


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Qatar Landing Point


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3 km


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23

Introduction of Rail



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24Introduction of Rail

Concept design:

Road only

Twin deck viaducts 80 m viaduct spans

Cable-stay bridges overNavigation 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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27

Technical Challenges



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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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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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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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Thank You

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