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850-Meter Continuous Steel Box Girder Highway Bridge in Algiers: Heavy-Duty Urban Mobility and Rapid Modular Erection
Pre-fabricated steel box girders were hoisted in massive segments, drastically reducing on-site welding and minimizing traffic disruption.
Project Overview
Spanning the expansive river basin in the bustling heart of Algiers, this 850-meter continuous steel box girder bridge serves as a vital civic artery. For major municipal infrastructure, city planners face daunting logistical hurdles: prolonged traffic paralysis, structural fatigue from heavy commercial loads, and steel corrosion driven by the Mediterranean climate. Shijie Heavy Industry alleviated these anxieties by delivering a highly functional, non-landmark engineering marvel. We utilized precision-engineered trapezoidal steel box girders, pre-assembled off-site and hoisted into place over robust V-shaped concrete piers. This modular approach drastically minimized urban disruption. Protected by a marine-grade anti-corrosion coating, the bridge guarantees low-maintenance durability. By finishing the erection 45 days early, we provided a seamless transit solution that rapidly eased urban congestion.
| Country | Algeria |
| Application | Urban Highway Bridge |
| Scale | 850 Meters Length, 6 Lanes |
| Structure | Continuous Steel Box Girders |
| Piers | Reinforced Concrete V-Piers |
| Corrosion | C5 Marine-Grade Coating |
| Erection | Segmental Modular Hoisting |
| Load Capacity | Heavy Commercial Rated |
| Traffic Impact | Zero River Blockage |
| Schedule | Finished 45 Days Early |
Accelerated Segmental Erection
Pre-fabricated steel box girders were hoisted in massive segments, drastically reducing on-site welding and minimizing traffic disruption.
Mediterranean Corrosion Shield
A multi-layered marine-grade epoxy system effectively repels coastal air and saline moisture, ensuring a long maintenance-free lifespan.
Exceptional Torsional Rigidity
The aerodynamic trapezoidal box girder design provides superior resistance to stress caused by heavy trucking loads across the six lanes.
Seamless Civic Integration
The sleek profile rests elegantly on robust V-shaped piers, maximizing navigable clearance while avoiding the costs of vanity structures.
Turning Site Challenges into Engineered Certainty
Proven technical interventions to keep your project on spec, on budget, and on schedule
Constructing over an active urban river typically causes severe traffic gridlock and disrupts vital shipping lanes.
Executed precise large-segment modular hoisting during off-peak night windows, ensuring zero stoppage to daytime city traffic.
The humid Mediterranean coastal environment aggressively accelerates the corrosion of exposed structural steel elements.
Applied a rigorous C5-rated heavy industrial anti-corrosion paint system, sealing the girders against moisture penetration.
Managing a river crossing in Algiers is a logistical nightmare. We needed a heavy bridge without paralyzing the city. Shijie understood our priorities, delivering a robust steel box girder system rather than an overpriced landmark. Their modular hoisting was a game-changer, keeping the river open to barges. Precision fabrication meant zero delays for field adjustments. Completing the superstructure 45 days early saved millions in diversion costs. The bridge looks sleek on those V-piers, and the marine coating gives us total confidence. An outstanding partner!
Products Used in Project
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Why Global Contractors Choose SynJect
Predictable delivery, certified compliance, and direct engineering support for zero-risk execution
Pre-assembled in our factory and 3D-nested for containers to cut ocean freight and site delays
Fabricated strictly to CE EN 1090-1, AISC, and ISO 9001 / 14001 / 45001 with full NDT traceability
Work directly with senior structural engineers from Tekla 3D modeling to on-site erection
Frequently Asked Questions
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Steel Weight Savings
1:1 Tekla 3D modeling optimizes beam-column ratios to eliminate redundant material costs.
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Checked against EN 1090 and local wind/seismic loads.
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CE EN 1090-1•ISO 9001•ISO 14001•ISO 45001
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