Robit® Casing Systems are the key components of the ground drilling applications. Their patented locking system enables easy and reliable drilling cost effectively. Robit® Casing Systems have several references worldwide in all major ground drilling applications: forepoling, anchoring, piling and underpinning, horizontal drilling, water and thermal well drilling, soil investigation/ monitoring and underwater drilling.
A world-class parking facility called Kivisydän (“Heart of Stone”) is currently being excavated by Finland’s leading underground construction company, Lemminkäinen Corporation at a depth of 30 meters beneath Oulu’s city center. One of the largest and most challenging of its kind in Finland, the project makes good use of Robit’s expertise.
Robit Rocktools Ltd and Lemminkäinen have worked in close co-operation for nearly a decade, mostly in ground drilling. Kivisydän is the companies’ tunnel excavation pilot project. “The project extends our good partnership to the area of tunnel construction. Robit is supplying us with the latest technology button bits needed to excavate the underground parking facility. They are also taking care of sharpening the bits,” says Pentti Nieminen, site manager from Lemminkäinen.
Construction and excavation in the downtown core sets special demands on the work and planning. “This is a challenging underground site” emphasizes Pentti Nieminen. “We need expert partners whose work we can trust explicitly. In demanding conditions, knowledgeable people and state-of-the-art equipment are crucial for success”.
Robit’s trump card is, in addition to high-quality products, the smooth integration of a bit-sharpening service with deliveries. “Thanks to the service, our cooperation partners don’t have to worry about servicing the bits. This allows them to focus completely on their core competence,” explains Timo Rajala, Robit’s Finnish Sales and Marketing Director.
In the course of the years, Robit Rocktools Ltd has been involved in several Olympic Games building projects all around the world. The work will continue with the next Winter Olympics in Sochi, as the local contractors rely on Robit products for digging the tunnel network – a necessary part of the game venue infrastructure.
The 2014 Olympic Games will be organized in Sochi, the first Winter Olympics to be held in Russia. To ensure smooth transport between the various sites, a tunnel network with a total length of over 26 kilometers is being excavated in the area. One of the key factors behind Sochi’s selection as the Olympic City was the creation of a functional road and railway network, and Robit has its share in this.
Several contractors in Sochi are utilizing the Robit RoX+ 88.9/8 Top Hammer system in tunnel work. The system consists of a pilot bit automatically locking with a ring bit, which makes work considerably easier and faster. “Word about the excellence of our product quickly got around the Sochi sites, and a total of six contractors started using it”, says Oleg Ivanov, Regional Manager at Robit Rocktools Ltd.
“Our co-operation went smoothly. The contractors appreciated our proactive technical support and service. We were able to respond to their wishes comprehensively,” Ivanov continues. Work on the Sochi tunnel sites is getting near completion. “We will continue by delivering our HTG bits to the Olympic sites as needed.”
The challenging construction work of the new, westbound metro line in Helsinki demands wide-ranging expertise. Drilling maintenance shafts for metro tunnels has little room for error, but Kalliorakennus-Yhtiöt ensured a successful end result by using Robit products.
The metro tunnel shafts are a vital part of the underground railway system. They serve as emergency exits, smoke vents and pressure equalization as well as ventilation systems. Among their other large contributions to the West Metro construction, Kalliorakennus-Yhtiöt had to drill 44 meter-deep shafts with a surface area of 68 square meters to solid Scandinavian bedrock – by no means a trivial task.
“We set tough quality requirements for the project, as the work outcome must be exact. We drilled the excavation holes for the shaft from the top right down to the bottom, whereas drilling is normally carried out from both the bottom and the top. It was crucial that the holes turned out straight,” explains site manager Martti Kähkönen from Kalliorakennus. “We used Robit Rocktools special equipment to make sure the drilling holes were straight”.
The collaboration between Kalliorakennus and Robit go back since the early ‘90s. “All of the bits we use are from Robit, because they are familiar products for me. I participated in the bit development work for the first time many years ago”, Kähkönen recalls. In addition to the shared history, Robit’s wide service offering has also impressed Kalliorakennus. “Robit is a reliable partner, but their bit-sharpening service was also a major reason behind why we chose them as co-operation partner in the West Metro project,” he says.
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