The City of Tampere and Kreate Oy have signed a contract for the construction of bridges across the Ranta-Tampella canal. The contract consists of the Ranta-Tampella bridge, Warkaanlahti bridge, Myllysaari bridge, Paasikivenkatu support wall and Paasikivenkatu road construction. The bridges will cross the Ranta-Tampella canal built previously.
This is an interesting bridge project in which the Ranta-Tampella bridge and Warkaanlahti bridge will share a concrete structure at the eastern end, but will fork into two bridges. The bridge shapes, designed to be sculptural and asymmetrical, are the result of differences in the canal banks’ features: the western bank near the bridge faces an embankment and tall buildings, while on the eastern bank the bridges are between steps leading down to the water and a gently sloping ramp. The curved sides of the bridges are designed to reflect the water surface during the day, while at night they are emphasised with lighting.
“The bridges are complex concrete structures, involving asymmetrical surfaces and geometric shapes that require solid expertise in concrete moulds. Our group also has plenty of experience in the foundation drilling required for the anchored pillars. The central location of the site and busy housing construction in the vicinity also require a lot from project management,” says Sami Rantala, Head of the Bridge Construction and Management business unit at Kreate.
Only the best quality for the PETOKE pilot project
The Ranta-Tampella bridges project is one of the PETOKE project pilots. PETOKE is a joint research and development project involving the Finnish Transport Infrastructure Agency, Infra Contractors Association in Finland, VTT Technical Research Centre of Finland and 19 cities. Its purpose is to develop the traditional operating models of construction projects and thereby improve project implementation and productivity.
“The PETOKE procurement procedure included special steps usually not present in projects of this size. The service providers had to undergo a rigorous preliminary process to fulfil certain requirements. During the procurement procedure, the service providers were required to present development proposals that were innovative both technically and financially. We have plenty of experience of demanding bridge projects, and seeking new and cost-effective solutions is integral to our operating culture,” says Rantala.
Kreate has built many demanding bridges requiring special expertise, some of which have received awards. Bridges built by Kreate that have been awarded by the Finnish Association of Civil Engineers rakentamia include the Isoisä bridge in Helsinki, the Heikinkatu underpass in Oulu and the Ylisoutaja bridge in Joensuu. Towards the end of 2018, the extra-long Jännevirta bridge was completed in Siilinjärvi.
The customer of the Ranta-Tampella bridges was the City of Tampere, and the contract was worth about 3.1 million euros.