The Follo Line tunnel roject is currently the largest infrastructure project in Norway and will include the longest railway tunnel in the Nordic countries. The new double track rail line forms the core part of the InterCity development southwards from the capital. The Follo Line is under construction currently and due to be completed by the end of 2021.
The Follo Line tunnel will be Norway’s first long twin tube rail tunnel and one of the first to be constructed using tunnel boring machines.
Efficient and forward-looking The Follo Line Project in total will comprise around 64 km of new railway tracks. The new double track line from Oslo to Ski will be 22 km long, and designed for speeds up to 250 km/h. The line will make it possible to reduce the journey time between Oslo and Ski by 50 % (from 22 to 11 minutes). The double track line will be an efficient, safe and environmentally-friendly transport system.
Hollow anchor bolt can simplify drilling, grouting and anchoring processes. It is easy and quick to operate and the construction quality is dependable. The whole length of hollow anchor bolt can be anchoring sufficiently. It’ll immediately provide support resistance after excavation, effectively inhibiting the loosening or deformation of surrounding rocks, which can avoid or reduce roof caving accidents or other diseases during the construction. In particular, the hollow anchor bar is provided with sufficient and uniform thickness of protective layer, which fully guarantees the durability of the hollow anchor bolt. It is especially suitable for supporting and strengthening the complex strata and broken rocks.