Rock netting

Rock netting – safety nets to keep loose rocks and boulders from falling

As the condition of rock cuts along roads deteriorates, road users’ safety must be guaranteed by improving the structural strength of the rock and/or by adding nets to prevent rocks from coming loose. Depending on the site, shotcrete may also be a viable solution. Reinforcement work generally includes many different work phases that ensure a high-quality, safe and lasting result.

Applications for rock netting

Rock netting is especially well-suited for different applications within the infrastructure construction, mining and construction sectors, where it is used to secure

• tunnels
• mines
• quarries
• roads
• and other cut rock surfaces.

Rock netting as an on-site working phase

Rock netting refers to improving the long-term strength and stability of a processed rock surface with suitable steel mesh structures. Steel mesh is combined with other supporting structures, such as bolts, to prevent rocks from falling in critical locations. Rock netting is usually put in place to prevent rocks from falling. Rock nets are used in combination with rock bolts. They ensure that small pieces of rock do not come loose between the bolts. Depending on the net used and the site’s requirements, rock nets are installed either by hand or with the help of applicable machinery. Rock nets are often used in combination with shotcrete so that the nets acts as reinforcement for the concrete.

Rock netting shares the load over a wider surface area, helping to hold in place any boulders that may come loose. Rock engineering often plays an important role for people as it, among other things, improves traffic connections, logistics and the operation of energy production plants.

Rock anchoring brings stability to more challenging sites

Complex and challenging reinforcement projects often call for a combination of rock anchoring and rock netting. Rock anchoring offers additional reinforcement when rock nets are alone are not enough to prevent large boulders from coming loose or the site is especially unstable. Rock surfaces with large fractures or boulders prone to coming loose can first be anchored with steel strips, after which steel net is installed over the entire rock structure, achieving a safe and stable structure.

JIITEE Työt – your expert rock netting partner

JIITEE offers you expert staff and all the necessary equipment to handle rock netting projects from scaling and removal of obstructing vegetation up to bolting, netting and project delivery. We are constantly improving our equipment selection, allowing us to work even more efficiently and to reinforce and install rock nets in higher and higher rock cuttings. Whether it is rock or mine nets, reinforcement nets or binding nets you are looking for, you can trust JIITEE Työt’s experts to handle the installation.

JIITEE installed rock nets and implemented reinforcement work for Agnico Eagle in Kittilä after the company sought out new contractors for various projects. Read more about JIITEE’s work at the Kittilä gold mine.

Rock netting we have made

• Agnico Eagle, Kittilä mine – Among other things, the rock netting of the main level of the mine and the crushing hall, as well as the reinforcement netting of the shafts
• Outokumpu Chrome, Kemi mine – Skanska Infra Oy – Rock bolting n. 150 000 m, rock net installation n. 10 000 m2
• Pepallonmäki traintunnel renovation (560 m) – R. Ajalin Oy – Drilling and soldering of grip pins, rock net installation and shotcrete 1 300 m3, carpet installation and post-sealing work
• Renovation of the wastewater treatment plant Henriksdal, Stockholm – YIT Sverige AB – Renovation of wastewater treatment halls, strengthening of roof structures, drilling and bolting 28 000 m2, rock net installation approx. 20 000 m2
• Porttipuisto, Vantaa – Lujalouhinta Oy – 4 000 m2 loose stone rock net installation of the rock wall and drilling and soldering of 1 200 anchor pins
• Lavianmäki traintunnel renovation (580m) – Destia Rail Oy – Drilling and soldering of grip pins 11 500 pcs. Rock net installation 11 500 m2, shotcrete approx. 12 000 m2
• Länsimetro Kivenlahti, Espoo – Kalliorakennus-​Yhtiöt Oy – Installation of the protective netting of the Kivenlahti metro station over shotcrete, 15 000 m2 and drilling and soldering of 15 000 threaded studs
• Länsimetro Soukka, Espoo – Kalliorakennus-​Yhtiöt Oy – Installation of the protective netting of the Souka metro station over shotcrete, 10 000 m2 and drilling and soldering of 10 000 threaded studs
• Länsimetro Kaitaa, Espoo – YIT Infra Oy – Installation of the roster netting of Kaitaa metro station 8 500 m2