our projects
Ouena bridge – Kouaoua
Year of production :
2017
Work description :
The Ouena bridge is an 80-metre-long structure with a frame structure known as the discharge structure, providing a larger hydraulic cross-section in the event of flooding. At the outset, the project required a preloading phase with vertical drains (on the right bank) and preloading embankments (on the left bank) to compact the soil.
The main structure comprises 4 spans of 20 meters each, founded on traditional 30-meter-deep bored piles with diameters of 1400 mm for the abutments and 1200 mm for the river supports. 40 prestressed 18.8 m beams were required for the 4 spans. The total concrete volume for the 2 structures was 900 m3.
Earthworks:
- Excavation: 9100 m3
- Backfill of all kinds: 11,100 m3
- Riprap: 6,200 m3
Project Owner :
PROVINCE NORD
Project manager :
PROVINCE NORD
Location :
Kouaoua
Date of receipt :
December 2017
Work cost :
610 000 000 FTTC
Activity :
Public contract
Engineering structures, PRAD beam bridge, traditional tubed bored piles
Know-how :
Preloading backfill with vertical drains, major earthworks, deep-tubed bored piles, long beams
