The 110 m long access tunnel was fully excavated in September 2019 and the teams could start the two faces of the main excavation blasting towards both north and south.
The entire Ryfast project with a total of three tunnels was opened on 22.04.2020. Including the Solbakk tunnel which was built by Marti AS. The tunnel runs 290 m below sea level, which making it the deepest underwater road tunnel in the world. The Solbakk tunnel was already opened on 31.12.2019. The tunnel was opened by the Minister of Transportation, Mr Knut Arild Hareide, from his office. Cutting of the ribbon, and the various speeches were live broadcasted on Facebook and various digital channels. Now the entire route is open.
More than 80% of the tram caverns have been excavated.
Excavation in the caverns will be completed within the next days. However, the
breakthrough will not come until
late spring, after completion of the cut at the mouth of the caverns.
The shaft construction work on the Piora portal (1847 metres above sea level) of the Ritom construction site is currently suspended during the winter break. Work on this portal is expected to resume at the end of March.
In November 2019 the excavation and securing work was completed. Since then, parts of the sole have been temporarily filled in, as the so-called convergence period is now running.
The teams at CERN have made an important breakthrough to the existing plant today! The remaining excavation work for the extension of the particle accelerator "Large Hadron Colliders" will be completed by March 2020.
Marti Germany is renovating and extending an electrified railway tunnel under traffic. The so-called tunnel widening system, developed by Marti Technik, is the decisive factor here. The Petersberg Tunnel Expansion project sets new standards and demonstrates the innovative strength of Marti engineers.
Our team at the Skullerud construction site in Oslo,
Norway, carried out the first blasting at the portal in May. Preparatory work
and planning are currently underway for the excavation work, which will start
in mid-July 2019.
Construction work for the complete renewal of the Ritom power plant in the canton of Tessin has started. The project includes the construction of a pressure tunnel, a new power station and an equalizing reservoir with a capacity of 100,000 m3. The renewal of the power plant, which was built in 1920, will last until spring 2022.
In January 2019, our team started the D15 Lovstakkentunnelen project in Bergen, Norway. The 90 million project includes the construction of two tunnels and two caverns as underground tram depots. The project will continue until February 2022.
The teams at CERN have finished excavating the
60-metre-deep shaft for the extension of the particle accelerator Large Hadron
Collider. The specially designed electric excavator could be used for this work
as planned. The cavern and the 300-metre-long tunnel will now be excavated until
The 8 km long Solbakktunnel was handed over on 01 February 2019. The team in Norway completed the two parallel tubes on schedule and handed them over to the satisfied client, Statens Vegvesen (Norwegian Road Authority).
Finally, the northernmost project up to now of the
Marti Group has been completed and opened for traffic.
works on the extension of the Large Hadron Collider at CERN have begun. The
excavation work for the shaft is in progress. Our electric tunnel excavator
will have reached a depth of 60 meters by the end of the year.
The breakthrough of the first tube of the world deepest underwater road tunnel took place yesterday.
The driving operations on the Vadlaheidi
tunnel in Iceland have been completed by the consortium Marti
Contractors and IAV.
Around 80% of the three 3'200m long tunnel tubes have been excavated.
The excavation works are half-way to completion. 880 meters are excavated from the east while over 560 meters are excavated from the west.
The traffic situation will be relieved by construction the third tube between Weinigen and Zurich-Affoltern.
In bright sunshine, the groundbreaking ceremony for the project took place on the local bypass Oberau on 01 September 2015 in Garmisch-Partenkirchen (Germany). The Federal Minister of Transport and digital infrastructure, Mr Alexander Dobrindt, was one of the party.
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The consortium «ARGE Marti Schlossberg», consisting of the Marti Tunnelbau AG, Marti Generalunternehmung AG and Marti AG Bern, is building a new car park with 300 parking places right under the castle mountain, the landmark of Thun.