Solbakktunnel (Norway) - Breakthrough RV 13 Ryfast

From the town of Stavanger in south-western Norway, a ferry now runs across the fjord to Strand municipality. Since mid-2018 the 14 km long Solbakk road tunnel provides this connection. The Tunnel is one of three tunnels comprising the Ryfast Project, currently one of the world's longest underwater roadway tunnel projects. This tunnel extending at a maximum depth of 290 m below the sea bed consists of two tubes separated by direction of traffic will replace the current ferry link between Stavanger and Tau.

[@stephengrube1532]

I used to watch these Marti Gruppe videos for their engineering marvels and persistence. Now I return again and again to these videos for their sheer power to inspire me to overcome hard things in my personal life.

[@ARFilms2]

Brilliant video, The cebrations at the end were fantastic and not just a celebration of the hard work achieved by the workers but a celebration of what mankind achieve when faced with a problem.

[@luminescentlion]

Why did they choose drill and blast for this project over a TBM which seems to be Marti's normal Memo

[@maddiekits]

TBMs can be very picky about rock type and conditions, poor site conditions can even make them slower to use than other methods.

[@luminescentlion]

@@maddiekits is that why here though? Isn't it mostly harder rock types in Norway? Seems like a very long tunnel to choose drill and blast over TBM.

[@MCasterAnd]

​@@luminescentlion In Norway, with the rock types we have here, the speed difference between TBM and drill&blast are so small it's not really economically feasible to do TBM. The conditions are usually perfect for drill&blast and progress can be made very quickly.
In addition, as drill&blast has been used extensively in Norway for many years, the equipment and competent personell is readily availble in virtually all parts of Norway, so the logistical costs are low. If they went for the TBM method, they would have to transport the TBM from & back to Switzerland, which, given Norway's not-always-so-great road infrastructure, would have been a logistical nightmare in itself - or they would have to transport it by boat to a nearby port.

[@OmmerSyssel]

@@luminescentlion Norwegian rock is as questionable as their beer! Hope for the best, prepare for the worst!😝

[@cristianponoran2015]

👍👍👍💪💪💪🙌🙌