bridges middle east - rick haggett - qatar bahrain causeway management
DESCRIPTION
The region’s only event dedicated to designing, planning and delivering sustainable bridgesFollowing the phenomenal success of IQPC’s global Bridges series, including two regional summits, we are delighted to announce the third Bridges Middle East summit will take place under the patronage of Abu Dhabi Municipality and the official support of Ministry of Public Works, Kuwait on 24-27 October 2010 in Abu Dhabi.For more information visit www.bridgesme.comTRANSCRIPT
Qatar-Bahrain Causeway Project
Bridges Middle East Conference 2009
2Introduction
• Bridges in the region
• Qatar-Bahrain Causeway
(the latest & greatest)
• Design and construction issues
• Introduction of rail
• Technical challenges
3
Bridges in the Region
Bridges Middle East Conference 2009
4Bridges in the Region
Typically:
• Water crossings
• Connect population centres
• Access key infrastructure
Notably:
• Abu Dhabi
• Dubai
• Bahrain
5Bridges in the Region
Drivers:
• Economic growth
• Population growth
• Urban expansion
• Development of major
infrastructure
• Increasing traffic
6Bridges in the Region
Abu Dhabi
Hodariyat BridgeSaadiyat Island Bridge (Sheikh Khalifa Bridge)
Sheikh Zayed Bridge
7Bridges in the Region
Dubai
Garhoud Bridge Palm Jebel Ali Crescent Bridges
Dubai
Metro
Sheikh Rashid bin Saeed Crossing (6th Crossing)
Business Bay Bridge
8Bridges in the Region
Bahrain
Sheikh Isa Causeway
Sheikh Khalifa bin Salman Bridge
9Bridges in the Region
Sitra Causeway
10Bridges in the Region
King Fahd Causeway
11
Qatar-Bahrain Causeway
Bridges Middle East Conference 2009
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
13Qatar-Bahrain Causeway
14
Design and Construction Issues
Bridges Middle East Conference 2009
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
16Design and Construction issues
Material:
• Volumes required
• Need to ensure
– Consistent quality
– Reliability of supply
• High import content
• Marine Borrow
• Durability considerations
17Design and Construction issues
Concrete Durability: Options
• Stainless steel
• Corrosion inhibitor
• Coating
• Cathodic Protection
• Extent of splash zone
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
19Design and Construction issues
Influenced by:
• Archaeology (Qatar)
• Competing land use (Bahrain)
• Stakeholder Requirements
Alignment at Landing Points
20Design and Construction issues
Qatar Landing Point
21Design and Construction issues
3 km
22Design and Construction issues
23
Introduction of Rail
Bridges Middle East Conference 2009
24Introduction of Rail
Concept design:
• Road only
• Twin deck viaducts
• 80 m viaduct spans
• Cable-stay bridges over
Navigation Channels
Introduction of Rail
25Introduction of rail
• Larger vertical and horizontal loads
– Freight
• Limitation on gradient and horizontal curvature
– High-speed passenger
• Extended Schedule
Impact of Rail
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
27
Technical Challenges
Bridges Middle East Conference 2009
28Technical challenges
Environmental
• Zero impact on hydraulic flows
• Extensive baseline measurements
• Ongoing Monitoring
• Constraints on construction methods
29Technical Challenges
Quality & Safety
• Remote sites
• Working at height
• Heavy lifts
• 24/7 working
• Cost-driven schedule
• Motivating the workforce
30Technical Challenges
Rail Issues
• Axle Load
• Speeds
• Height Clearance
• Emergency Escape
• Maintenance Access
• Bahrain Network
• Qatar Network
• GCC Network
31Technical challenges
Dredging of Navigation Channels• Unsuitable material• Creative disposal
Ship impact on Main Bridges• Designed to deflect• Seismic resistant• Visual Impact• Technical challenges
32Technical challenges
Settlement of Embankments
• Soil improvement & testing
• Deferred rail solution
• Ballasted track
High Voltage Interconnect
• Three 220 kV circuits
• Two 400 kV circuits
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
34
Thank You