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MOTORWAY / TUNNEL / STRUCTURES
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Over 300 km of underground pipes filtering water in water-protected areas
By 2050, around 45% of the world’s population will live in areas faced with chronic water shortages. Croatia is among the 3 richest countries in Europe in water resources.
Preservation of this natural resource is becoming crucial for our future generations. Personal habits must change and the behaviour of companies must be more responsible. Mirna, Raša, Dragonja, Pazinčica and Boljunčica are the rivers whose valleys are crossed by our Motorway.
A system of 300 km of underground pipes, 55 filtration chambers, 11 drainage lagoons to separate the impurity of the size of Olympic pools. 250 laboratory tests of water quality are conducted in partnership with the Istrian County Public Health Institute. Bina Istra Intervention Service is specially trained and equipped for quick response in cases of environmental incidents .
In one year, more than 3,000,000 m3 of water is collected from our Motorway and filtered. This corresponds to the annual consumption of the population of the town of Pula.
16 000 square meters of noise attenuation walls reducing vehiclegenerated noise.
Works at the height of 90 m
Works
on the protection of the Vela Draga slope took place under special conditions that allow the tunnel to continue operating during the works. 30 professional climbers worked in extremely demanding conditions on cliffs that reach 90 meters in height. State-of-the-art technology was used to complete this project, and 650 anchors were drilled in to provide a 325 meter barrier that protects the road from falling rocks and stones.
Mirna, the Viaduct constructed on friction piles reaching 80 m in depth
The 1,354 meters long Mirna Viaduct is the most significant structure It literally “floats” over the valley of the river Mirna, whose soil is very soft, and even the deepest boreholes do not reach a solid ground. Therefore the Viaduct rests on friction piles, the longest of which reach 80 meters in depth. The overall structure consists of a total of 14.2 kilometres of steel piles driven in the ground, protected by an electric field to avoid corrosion problems (cathodic protection system).
