THE CUNENE RIVER BRIDGE IN ANGOLA (2009).
CHALLENGING CONDITIONS AND THEIR IMPACT ON THE DESIGN AND CONSTRUCTION OF AN 880m BRIDGE IN ONE OF ANGOLA’S
MAIN ROAD CORRIDORS.
Juan Jorge3rd of April 2012
Locality Plan
Bridge
Cunene River
EN – 120 Road, linking Lubango to Namibia
First Solutions
War and Destruction
Emergency Solution on Main Channel and Bailey Bridge that was incorporated in a second stage
Satellite View of Cunene River Crossings
Previous Permanent Crossing
Bypass Fill and Bailey Bridges
Satellite View of Cunene River Crossings
Previous Permanent Crossing
View of Bailey Bridge over 3rd Channel View of Fill
Definitive Solution Desired
• National Reconstruction Program• INEA - MINUC• Robust permanent structure• Quick construction required• Minimize concrete use because of lack of existing
nearby quarries – Light superstructure in order to reduce dimensions of
piles • Have independence from changing riverbed
conditions during construction
Definitive Solution Adopted
8m1.8m
Camp Establishment
Camp Establishment
Drinking water?
Electricity?
Diesel, food, general supplies?
Construction supplies?
Communications?
Difficulties Surrounding Camp Establishment
DateActivity 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Precast SlabsPiles
Substructure
LaunchingDeck
SurfacingJoints
2007 2008 2009
Girder Sections (Fab. y Trans.)
Construction Program
Reconstruction of Corrosion Protection
Precast Slabs
Type A Type B
Shear Connectors
Drainages
Precast Slabs Yard
Precast Slabs Yard
Precast Slabs Yard
Construction of Girder Sections in China
10 Types of sections
142 sections in total ≈ 2 500 tons of steel
Construction of Girder Sections in China
Transport of Girder Sections
Qinhuangdao, Hebei, China1st First Delivery February 2008
Xangongo, Cunene, Angola1st Delivery arrives April 2009
Transport of Girder SectionsRoad Transport in
Angola
Substructure
Substructure
Substructure
Substructure
• 12 piles had to be built in the main channel of the river.
• In these cases end tipping, in order to build a dry working platform, was executed and the piles constructed in a second stage
Substructure
Substructure
Superstructure – Welding and Launching of Girders
Superstructure – Welding and Launching of Girders
Deck Construction
3mm every 3 metres
Insitu concrete of sidewalk?
Leave service ducts for future services in sidewalk?
Surfacing and Expansion Joints
Guardrails and Lighting
Guardrails and Lighting
Recent Images
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackObserved Effects
Soft Water AttackSolutions
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