Trondheim Landscape

Conference Program

The program of RocDyn-3 includes courses, forums, technical presentations and excursions as well as social events.

25 June 26 June 27 June 28 - 29 June

15:00 - 17:30


19:00 - 19:30

Reception concert in Nidros Cathedral

19:30 - 21:00


08:30 - 09:00

Conference opening

09:00 - 10:30

Keynote speeches

10:30 - 10:45

Coffee break

10:45 - 12:15

Technical sessions

12:15 - 13:15


13:15 - 14:45

Technical sessions

14:45 - 15:00

Coffee break

15:00 - 17:30

Forum 1: Rockburst and dynamic rock support

19:00 - 22:00

Conference dinner

08:30 - 10:00

Keynote speeches

10:00 - 10:15

Coffee break

10:15 - 12:15

Technical sessions

12:15 - 13:15


13:15 - 15:45

Technical sessions

15:45 - 16:00

Coffee break

16:00 - 18:00

Forum 2: Dynamic testing of rock and blasting

18:10 - 18:30

Best paper awards and Conference closing

Post-conference excursions

Excursion 1:

A 2-day excursion to the western coastline - road tunnels, a subsea tunnel, mountain slides, etc.

Excursion 2:

A half-day excursion for bedrock, underground openings and rock slope stability in the Trondheim area on 28 June.

Excursion 1 (min. 20 and max. 45 participants)

Dates: 28 – 29 June 2018

Excursion route: Trondheim - Kristiansund - Åndalsnes - Dombås - Trondheim.

We’ll visit mountain road tunnels, a subsea tunnel, the Atlantic Ocean Road, the ice-formed landscape and an active sliding mountain on the western coastline of Norway along the excursion route. The excursion starts in the early morning Thursday on 28 June by bus and returns in the evening Friday on 29 June.

  • 1 - Five mountain tunnels in 20 km (2005):
    Brekktunnelen, 1290 m
    Mannsfjelltunnelen, 1726 m
    Svalnestunnelen, 722 m
    Viggjatunnelen, 2711 m
    Storsandtunnelen, 3653 m
  • 2 - Atlantic subsea tunnel (5.8 km)
  • 3 - Atlantic Ocean Road
  • 4 - Hustadvika Gjestegård
  • 5 - Rockfall / mountain slide
  • 6 - Plateau, > 2000 m a.s.l.
  • 7 - Oppdal shale quarry

On day 1, we leave Trondheim and travel west toward the western coastline. Shortly after the start of the excursion, we meet five mountain road tunnels in a stretch of 20 km, which are located approximately 20 km southwest of Trondheim. They were opened for public traffic in 2005 and represent the state of the art of the Norwegian tunnelling technology. The bus will stop in one of the tunnels for a look. It will be a short stop in one of the mountain tunnels. After approximately 4 hours we arrive at the Atlantic Ocean Tunnel (subsea) in Kristiansund on the western coastline. The tunnel is 5.8 km long, 250 m under the sea water surface, and 10% for the steepest slope. The tunnel was opened in 2009. The bus will stop in the bottom of the tunnel for a look.

excursion excursion

Atlantic subsea tunnel: opened in 2009, 5779 m, 250 m u.s.l., 10% slope.

After the Atlantic subsea tunnel, we continue the journey along the western coastline for 30 km and come to the spectacular Atlantic Ocean Road. The road connects Averøy with the mainland via a series of small islands and islets spanned by a total of eight bridges over 8274 meters. It is known to be the world's most beautiful drive.


The Atlantic Ocean Road

We end up at Hustadvika Guesthouse in the first day of the excursion, where we are staying one night. Hustadvika Guesthouse is located right at the edge of the ocean. Hustadvika is one of the most dramatic stretches along the Norwegian coast. One will really feel the forces of nature if one is there on a rough day. One will feel the beauty of the coastal landscape if one is there on a day of nice weather.


The Hustadvika Guesthouse

We head to Trondheim via E136 and E6 on day 2. We'll view the specular landscape formed by glacier in the area of Åndalsnes where Trollveggen (the Troll Wall), the highest vertical rock face in Northern Europa, is located. Trollveggen is approximately 1,700 meters from the bottom of the valley to the top of the wall, of which 1,000 meters are vertical, where the mountain masses partially hang 50 meters beyond the wall. Not far from the Trollveggen is a 1,294-m high moving mountain called Mannen (The Giant Man). Mannen stirs the media in the raining season of every year in the past 5 years. It is one of the most monitored mountains in the country. It is estimated that approximately 120,000 - 180,000 cubic meters could fall at first and in the future as much as 2 - 3 million cubic meters could slide down.


Trollveggen (the Troll Wall)


Mannen (the Giant Man)

Dombås is a town in Dovre municipality. The altitude of Dovre is above 2000 m a.s.l. Dovrefjell National Park is the only place in Norway, and one of few places in the world, where one can get close to the musk ox. Dovre has an inland climate with little precipitation, cold winters and relatively cool summers.

In Oppdal we may visit a shale quarry. The Oppdal shale has been widely used for the construction of roofs and floors in Norway.


Oppdal shale

Excursion 2 (min. 20 and max. 45 participants)

Bedrock characteristics, underground openings and rock slope stability in the Trondheim area

Date: 08:30 – 13:30 on 28 June 2018, including lunch

Excursion route: The excursion starts from the city centre and has Leirfossene underground hydropower plant as the main stop. The design of recently completed road tunnels and stability of road cuts will also be discussed, and there will be an opportunity to have a look at geology and the main characteristics of the bedrock in the Trondheim area.


Geology of the Trondheim area. Brown color: greenstone, pink: granodiorite, grey: soil. From NGU geological map in scale 1:50,000. Square dimension: 1x1 km.

Bedrock along the route

The bedrock along the excursion route is Paleozoic and belongs to the Caledonian mountain range (age 520-400 million years). The most common rock is greenstone. Locally there are also zones / layers of granodiorite and volcanic tuff. A large part of the area is covered by soil; mainly marine clay, but also sand, gravel and moraine.

Leirfossene hydropower plant (site 1)

The construction of the Leirfossene power plant was completed in summer 2008. The new power plant is located in bedrock west of Nidelva river and has intake at the reservoir of the older plant named Upper Leirfoss. The rock in the power station area is mainly greenstone. The water is taken into shaft and headrace-tunnel down to the power station. After having gone through the turbines, it is discharged through an approx. 1.5 km long tailrace tunnel.


Layout of tunnels and caverns of Leirfossene hydropower plant (in orange). Dark blue line is the tailrace tunnel of the Brattsberg hydropower plant, located further upstream.

Marienborg and Steinberget road tunnels (sites 2 & 3)

The Marienborg and Steinberg tunnels represent part of the Nordre avlastningsvei (Northern ring road road). The project consists of several tunnels and bridges, which were built over a period of 5 years and completed in spring 2010. The project helps to ease the traffic load through Trondheim center.

The tunnels are located mainly in greenstone, with some minor sections of granodiorite and volcanic tuff. The approximately 1-km long Steinberg tunnel was opened for traffic in March 2008 and the 1.3 km long Marienborg tunnel was opened in spring 2010. A special feature of the former is the large roundabout with a span (width) of up to 25m in an area with less than 20m of rock cover.


Overview of the Northern ring road, with Marienborg and Steinberget road tunnels located to the west (left) of the red section.

Rock slope stability along Bynesveien (sites 4 & 5)

The bedrock along Bynesveien consists mainly of greenstone, locally with well-developed pillow structure. The greenstone is a slightly metamorphosed seafloor basalt, with the pillow structure having been formed when the lava was rapidly cooled down on the seafloor. Greenstone, with amphibole, plagioclase, chlorite and epidote as main minerals, is the predominant rock type also in this area. At Høvringen (site 4) there is a large intrusion of igneous rock; granodiorite.

Several places along the road there are high cuts with significant stability problems. Rock bolts and steel mesh are used to stabilize the cuts. In some places, unstable rock blocks have loosened and started rolling down the natural slope to the west (from Bymarka). In some cases such blocks have hit the road. Catch fences are used in some places to protect against such rockfalls.


Large block from hillside above hitting the road close to site 5 in 2005.