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Sirkkala bridge construction, Joensuu

The project was completed by using a so-called “common worksite” principle. The main contractor was responsible for the consolidation of project work, such as district heating, water supply and sanitation, street lighting, electricity and telecommunications projects 1–3, and the surfacing of the bridge. Project planning was started in 2012; construction of the bridge started in May 2013, and the bridge was opened to traffic on 28 November 2014.

SITO Construction’s responsibilities in the Sirkkala project included preparing material for tender requests together with the client, coordinating occupational safety during the construction, supervision of infrastructural work, local supervision of bridge construction, organizing worksite reviews, preparing memos of the reviews and worksite meetings.

The project included an extensive amount of infrastructural work. A roundabout was constructed on the eastern side of Pielisjoki, and street structures were renewed on a stretch of about 500 m. An oval-shaped roundabout was constructed on the western side of Pielisjoki, and Rantakatu was renovated on a stretch of about 400 m.
When the streets were renovated, the former combined sewer was replaced with rainwater and sanitary sewer lines. Electricity suppliers and telecommunications operators renewed and transferred cables, and district heating lines were renovated.

The renovation of the streets and construction of new streets was implemented as deep surface preparation (1,900 mm). On the western side of Pielisjoki, an artwork entitled “Kranssi” was installed at the Rantakatu and Yläsatamakatu roundabout. Kranssi was one part of the artwork placed in the centers of the roundabouts in the center of Joensuu. Sito Oy and sculptor Hannu Siren were involved in the design of the artwork.

The built urban environment caused challenges to the street construction. Due to the industrial facilities and companies on the eastern side of Pielisjoki, it was necessary to permit traffic for the whole duration of the construction. On the western side, Rantakatu was closed to traffic for three months according to a worksite plan and a schedule prepared by the contractor. Access to properties on Rantakatu and Yläsatamakatu and maintenance of the properties had to be arranged for the whole duration of the construction. Old networks had to remain in operation until new ones were connected and ready for operation.

The challenges related to the bridge construction included the following:

– construction and demolition of a work bridge
– Pielisjoki and traffic on the water, such as rafting and vessels
– underwater structures (watertight support walls)
– underwater work (flowing water)
– risk of falling (equipment and workers)
– flowing water
– dams formed by ice in the winter
– bolting the drawbridge (around 650 tons) into position

Due to the demanding nature and location of the site, occupational safety at the worksite was especially important.
An MVR meter was used at the worksite. Occupational safety inspections were performed regularly by the contractor, and the safety coordinator kept a record of observations. Also, an inspector from the Regional State Administrative Agency visited the worksite several times during the project. Occupational safety issues were handled separately at worksite meetings. There were two work-related accidents during the project that resulted in absence from work.

The role of the parties was emphasized during the project to ensure smooth cooperation and the completion of the project within the set schedule and in a good team spirit. Although there were changes to the plans and construction solutions during the project, it was completed without delay.

The drawbridge of the Sirkkala bridge, and parts and control equipment that are directly connected to it have been designed to comply with the requirements of the Machinery Directive 2006/42/EC. A technical file, that is a CE marking document, will be compiled of the documents of the bridge according to the directive.

Client
City of Joensuu
– Head of street construction Jouko Tolvanen
– Deputy Mikko Honkonen

Bridge supervision and bridge specialist
Siltanylund Oy / Kari Laurinen

Bridge principal designer
Ramboll Oy / Ilkka Vilonen

Infrastructure on the eastern side
Ramboll Oy / Mikko Ruokolainen

Infrastructure on the western side
FCG Oy /Jorma Ilonen, Eino Mönkkönen

Regional supervision and occupational safety coordination
Sito Rakennuttajat Oy /Harri Saarinen

Main contractor
Kesälahden Maansiirto Oy
– Timo Tiainen, Project Manager
– Matti Hirvonen, bridge responsible
– Esa Pyöriäinen, infrastructure responsible

The cost of the project was around 11 million euros. The bridge’s share of the costs was around 7.5 million euros.

The drawbridge was assembled from steel blocks on location. The surfacing material of the drawbridge is bitumen rubber asphalt.

Technical specifications of the bridge
– permanent waterway bridge 113.8 m
– lift bridge (steel) 37.7 m
– total length 151.5 m
– underpass and equipment facility on the western bank 12.8 m
– amount of concrete 5,000 m3
– pre-stressed steel 70,000 kg
– steel deck of the drawbridge 200 tons
– total weight 650 tons (counterweights and other structures)
– rafting and vessel guides 350 lm/170 tons of steel
– granite cladding around 1,000 m2
– there were 40 employees at the site at most
– construction period May 2013–December 2014