The Metsovitikos River Bridge is the most iconic engineering landmark of the Egnatia Odos motorway and holds the title of the highest bridge in Greece. Located in one of the most challenging geological environments in Europe—the heart of the Pindus mountain range—this project spans the deep Metsovitikos ravine with a deck that rises approximately 150 meters above the riverbed. The bridge ensures the continuity of the motorway across a terrain of extreme requirements, merging pioneering engineering with absolute safety.
NAMA completed the comprehensive design of this strategic infrastructure, applying advanced prestressing methods and structural analysis to manage the massive loads and environmental pressures acting upon the structure.
Technical Innovation and Specialized Structural Design
Constructing the country's highest bridge in an area characterized by high seismic activity and complex geotechnical data required cutting-edge engineering solutions:
- Maximizing Height and Stability: With its tallest pier reaching 110 meters, the bridge was designed to withstand high wind pressures and seismic stresses. NAMA’s study focused on the dynamic response of these towering piers, ensuring the structural integrity of the entire system.
- Circular Arc Geometry: The bridge follows a horizontal circular arc with a 1500m radius. This geometry, combined with the immense height, necessitated extremely precise calculations to manage centrifugal forces and ensure passenger comfort and safety at high speeds.
- Precast-Prestressed Beam System: The superstructure consists of six (6) simply supported precast – pre-stressed beams per span, each 35m long. The use of precasting was vital to overcome the difficulties of accessing the deep ravine and to address the limited construction windows dictated by the harsh mountain winters.
- Independent Branch Operation: The bridge consists of two entirely separate branches, each 14.45m wide. This independent operation provides functional autonomy, facilitating easier maintenance and inspection of such a large-scale infrastructure without disrupting traffic on the country's primary east-west axis.
Key Figures and Strategic Impact
The Metsovitikos Bridge is not just a road project; it is a landmark of modern Greek engineering and a vital link in the Trans-European network:
- National Height Record: Rising 150m above the ground, it is the highest point of the Greek road network, serving as a point of reference for the international engineering community.
- Scale and Scope: With a total length of 288m and eight (8) spans, the bridge is a significant technical feat that completes the connection between Western and Northern Greece, bypassing a ravine that previously required hours of dangerous driving on old mountain roads.
- Pindus Terrain Resilience: The design successfully addressed the extreme temperature fluctuations and heavy icing phenomena typical of the Metsovo altitude, ensuring the motorway remains operational 365 days a year.
- Ecological Balance: Despite its massive scale, the design minimized the footprint of the piers within the riverbed, ensuring the preservation of the natural flow and the local biodiversity.
For NAMA, the design of the Metsovitikos Bridge represents the pinnacle of our technical expertise. Designing the highest bridge in Greece demonstrates our commitment to overcoming natural obstacles through scientific innovation, connecting regions with safety and vision.
