The aqueduct to be renovated on the slope of Puijo was a DN300 SG pipe built in 1966, with a length of 123 m. It serves as a supply line for the Puijo II top water tank. During the day, this water tank distributes water for consumption in several districts of the city. The water supply to be renovated was a significant main line and water is supplied through
it, for example to the Kuopio University Hospital. The aqueduct was in fairly good condition, but the owner wanted to renovate it to ensure operational reliability. A particular challenge for the renovation was the fact that the pipeline was located on the steep Puijo slope, at a slope of about 45°.
JOHAN LUNDBERG OY
”In the first phase, Johan Lundberg Oy’s (JLOY) tasks included evaluating possible methods and suitable materials, assessing the cost of different no-dig options, making a recommendation for renovation and pipe material, and risk assessment. The aim was to get a view on the best way to renovate the aqueduct. Once the renovation method had been decided, JLOY drew up a construction plan and acted as a construction consultant, making all the necessary documents in Finnish and English for invitations to tender. During the construction phase, the company also acted as the client as a technical supervisor.” said Sari Pietilä, an expert at JLOY.
”At different stages of the project, we were in contact with both domestic and international experts, material suppliers and contractors. Communication was handled smoothly through my extensive international network, which is a result of working in the field since the 90s.” added CEO Jukka Huusko.
For the client Jani Liukkonen, Kuopion Vesi Oy was asked to comment. He was asked, ‘What was it like working with JLOY’s experts throughout the project?’ He replied: “In my opinion, two of the most important things in a consultant’s work are to stick to schedules and know their own role in the project. JLOY’s experts performed these perfectly. They were also easy to approach on any issue. They did exactly what they were asked to do. Although the schedule of the project was tight in terms of preparatory work, JLOY took care of things quickly and on time. Throughout the project, JLOY’s experts had the right kind of approach for their work, which allowed the client to take it easy when faced with a new and unfamiliar renovation method.
He was further asked: How did the project succeed? He replied: “The project was a great success. The team of the contractor Pollex Ab was nice and business-like, and the work was really professional. Each employee had their own role and responsibility, due to which the work progressed seamlessly forward. I really appreciated the fact that they told me what was going on at which stage and why.”
Jani Liukkonen concluded saying: “This project gave Kuopion Vesi Oy a lot of valuable knowledge and experience in unexplored methods. I believe that this and other ways of renovating the unexplored method will increase in Kuopio in the future as well. Many thanks again to Pollex Ab and JLOY for the whole project Success. Hopefully, we will continue to work together in the future.”
For the contractor Pollex AB, a member of No-Dig Alliance, Tobias Wingqvist said: “We are very pleased with the progress of the project, it was carried out in the best possible way and all parties were very professional. The preparatory work carried out by Johan Lundberg Oy and Mestar Kuopio Oy was thorough and laid the foundation for a smooth installation. Pollex AB is satisfied to have completed its first form pipe installation in Finland!”
