I watched a whole documentary on this not long ago, one of the coolest projects at happening in the world right now, can’t wait to see what else you do with it
I have been a Carpenter for 40 years, and this sort of project is enough to make your head spin. Making a machine to pre assemble the reo-bar is mind-blowing, but it is necessary to take away the human element, which could easily introduce flaws into the reo cage. The placement of the concrete is by pump booms and vibration to ensure proper compaction, super critical in an underwater environment. Aaron and his colleagues are very fortunate to be able to visit all of these amazing places and projects around the world and yo share them with us. Mark from Melbourne Australia
Every single comment or close is wrong... 1. It's a rebar, not a reo-bar 2. The reason of the machine for the rebar is not to remove the human element, but because usually rebars are tied with tiny steel cables. Here they are welded to stay in place and remain recise during the movements, but also and mostly because they assemble it flat, and then lift it. It's VERY unsafe to lift those cages without welding. Doing the welding by hand is too slow. And it multiplies the time for the workers with the back down. So in terms of health, safety it's dumb. BUT MOSTLY, it's the same segments. So it's repeatable. Therefore it makes sense. If it was not repeatable, a machine would make 0 sense. So nope, sorry for your assumptions. Unlike what you think, moving the rebar by one centimetre of imprecision is not changing anything to the structure. 3. No the pump does NOT change anything about the compaction. There are several reasons for that choice. - the volume that needs to be poured in a rather short period is massive - they want a monolithic structure - they are indoor Why does that matter? They need to go at the right rhythm for the structure to be indeed monolithic. That rhythm might be possible outdoor with 2 cranes working on 2 sides of the structure. But indoor, with the overhead crane on rails, it would be so slow. So there is no choice, the pump is the only solution to be productive and to end up with a monolithic structure. And it's the safest. And you can see that they use at least 4 pumps. Impossible to work with as many pouring teams in such a short space with a crane. 4. Yes the vibration is important... But guess what, it's as important in a tunnel, in a building, on a runway, etc... It's a critical phase of pouring concrete anyway. But here it's much easier because the environment is controlled, the concrete has an optimal flow and resistance, and they can stay consistant, which is close to impossible outdoor.
0:38 There actually used to be train service across the Fehmarn belt. The trains would go onto the ferry. You can still see the rails on Google Maps at the ferry dock.
@@AaronWitt They didn't just try. The ferries carried trains from 1963 to 2019. They only stopped because the train lines leading to the ferry terminals are now in the process of being upgraded for the new tunnel. Edit: And before that there had already been a train ferry between Warnemünde in Germany and Gedser in Denmark since 1886. After WW2 Warnemünde was in East Germany, so a new train ferry from Großenbrode to Gedser was established in 1951, which was then replaced by the Puttgarden (Fehmarn) to Rødby ferry in 1963 after a bridge connecting Fehmarn to the (West) German mainland had been built.
@@RangieNZ Yeah, this isn't the only train ferry connection in the world by any means. There are about two dozen or so currently operating around the world, and more than a hundred former ones that are now defunct.
You should check the Norwegian floating tunnel highway ! Unlike this project safely at the bottom of the sea, it will be floating in a fjord, but the tunnel part will be underwater. th-cam.com/video/WMbSzFf_wTc/w-d-xo.html
@@xiv3r This link is more like the Öresund Bridge. Here, on both sides they plunge in a tunnel from the banks, there is no bridge section. But indeed, the tunnelling method seems to be similar. BUT this technology isn't new although it's not common. Examples? - Bouwdok Barendrecht (2012) - Transbay Tube (1969) - Hong Kong-Zhuhai-Macau Bridge (2010) - Drogdentunnelen (following the Öresund bridge (2000) The technique has been used since the 1950s, What changed with the example here, and the one you mentioned is the scale, and the industrialisation of the serial production as the projects are larger.
Great video! Here in New Zealand we have a north and south islands with a gape of 15k at the closest points and intercepted by the Cook Strait which is deep and notoriously rough at times. There has been talk of a bridge construction to join the islands but has never gotten past a serious standing around a coffee machine discussion! Watching this video shows that it could possibly work in New Zealand with the modern technology available today, the biggest problem we have though is our population is less than 6 million, so i am guessing we will need to be approaching something like 20 million people before any serious progress for a permanent link between the islands to happen
Great video! Can you make some longer ones? I imagine a lot of your footage was cut. It would be fascinating to see the full content on a second channel.
That's one slick operation. From design and engineering to completing a segment it's quite impressive. Well documented as usual by a visionary YT channel creator. Cheers.
Aaron please turn up the volume on your videos some of them are really quiet and please do a follow up video to this one I would love to know how they connect the tunnel sections under water 💧
Another banger Aaron, you make it all look and sound so epic also props for being on top of all these insane projects and getting there to show us all. Keep it up!
What an awesome project! Aaron, you and the B1M make exceptional construction videos 👍🏻 Looking forward to part 2, and even more videos on this project if you can.
Man if you go back just a few years this would have probably costed somwhere in the 50-75 billions that just tells you how fast technology has evolved.
The absolutely crazy thing is that in Québec, there was a proposed tunnel project, and from the outset, it was evaluated at well over 10 billions. The gap to cross is shorter. The portion that crosses the St-Laurence is somewhat tricky, but the rest of the project would have been in good hard rock. We simply cannot seem to be able to build infrastructure at a reasonable price in North America.
Perhaps this tunnel production site could make segments for other tunnel projects, after this first tunnel is complete. For example a tunnel connection between Finland and Estoni, to allow the new Baltic rail line to connect with Finland.
Think Aaron was impressed by the magnet 🤔🤣 unreal project been following it with a while now Coz there’s an 🇮🇪 guy driving a massive digger, he’ll be on next video 🤞🏻 so overall great to get this insight 👌🏻😍
Hey Aaron,love the videos. Been watching a few years now. I'm having volume issues. It's very low on this one. I've got the TV cranked way up. I believe in you. Fix that shyt
This is incredibly impressive. I imagine this was also engineered to be repaired as necessary once in place. I'm thinking the watertight gaskets in between each element would need to be replaced periodically right?
No never, Its a special compound that are only needed to actually place the segment and connect it to the other segments, It uses Vacuum to completely connect it in. And then it will get a seal from the inside. So its only to actually connect the segments together.
Trelleborg Marine & Infrastructure is experienced in sealing immersed tunnels ! They use: - Gina gaskets th-cam.com/video/9qIEZOf8EPk/w-d-xo.html - Omega seals (clamped inside the tunnel) th-cam.com/video/R3mEHLNnyAE/w-d-xo.html Designed to last 120 years. Pressure test between the two seals before removing the bulkheads. They supply the bulkhead seals (for the whole project, reusable systems). And for more info on their job: th-cam.com/video/A1JUWBelfeg/w-d-xo.html There are the joints between the sub-segments for which they also supply the sealing solution. At the end, the tunnel is covered by gravels.
I am curious/amazed regarding your level of access to this project. And I find it very interesting. You know, (of course) about the Ted Williams Tunnel in Boston. The elements were built in Alabama ??? and then floated to Boston.
Well, the connection already exists. It's supposed to be expanded to two lines and electrified though, and that's behind schedule (of course). They started on it though.
@@EinfachFredhaftGaming It's part of the railway line Bahnstrecke Lübeck-Puttgarden; completed in the late 1920s. There used to be train ferries crossing there - just take a look at google earth if you don't trust DB that much. The train tracks are right at the ferry harbor next to the tunnel already. Like I said the connection is supposed to be improved (6 projects in total) and that's in various stages. But fundamentally, a single-track connection is already in place.
And not even talking about the Brand new Highway upgrade they have promised. They need to get their shit together, most of the construction of the actually arrival point are well underway. But its up to the Germans to construct the aditionel Rail and Access way.
1. A trench is prepared to welcome the tunnel. 2. The trench will be prepared with some gravels to have an ideal surface to receive it. 3. They transport the segments that float. 4. They arrive in position, and fill them with enough water in ballast tanks for them to sink slowly enough to be able to manoeuvre and position them properly. 5. There are some kind of jacking systems when they are at the bottom of the see so the new segment can come and squeeze the seals to the existing segments in place. 6. The water between the seals is removed, and the segments are pressure tested (2 Trellbord Gina and Omega seals) 7. Once they are positioned, they add ballast concrete, and remove the water in the ballast tanks. They end up not being boyant anymore. 8 The bulkheads are removed 9. The tunnels are recovered with gravels, and with the local conditions so the habitat can be re-established by the fauna / flora. Note: It's a very simplified description of all the elements to ensure of the perfect positioning, the controls performed, etc...
@@fabr5747 Where did you get that? Adding ballast on the inside just takes away usable space. I can't post links but search yt for "Construction of the Fehmarnbelt Tunnel (animation)" where they show not only that they'll use rocks up top to keep it down, but also the alignment mechanisms.
That huge factory and floating basin... Did they build that whole set-up just for this one tunnel project, or is it a factory that can make various sections for any tunnel project in northern Europe? Seems a waste to go through all of that just for one project.
Here's hoping that these structures will be adequately protected against "accidental"... contact with ships who just so happen to forget to raise their anchors while underway. The same ones who are crewed by one certain special Eastern European nation.
No point actually. because it will be buried underneath the seabed. They will cover the whole tunnel and the seabed will be where it is today. They have drenched a 18 Km long and 12M deep Trench on the bottom of the sea. So it will be under the seabed.
Designed to live 120 years. Trellborg is specialised in this, they have tens of projects of this type. And if required, they will find solutions anyway for repairs, if not already taken into account.
The channel tunnel is not inside of the sea. It's below the sea, inside the rock. This tunnel is an immersed tunnel. So that's the difference. The channel tunnel was challenging because of the geology, they had to go to areas that would reduce to close to 0 the risk to be flooded while using a TBM. Here, they are at the bottom of the sea, and not in the rock under it. So here you have the distinction. And it's not a matter of making small distinctions to get a record on paper (like antennas on skyscrapers). It's a completely different type of projects, with its unique set of challenges. It is an exceptional project for this type of construction selected.
fabr5747 sort of already said it, but the channel tunnel was drilled, whereas the Femarn belt is built from elements lowered onto/into the seafloor. It's the longest built with this technology.
How are they going to deal with the rubber gasket's breaking down is my first question. Then there's the limited lifespan of concrete and rebar, let alone a saltwater environment. More than my simple layman brain can handle when thinking of the cost of this endeavor.
Not a chance in hell I’ll ever willingly pass through that death trap. 9 billion to do unbelievable stuff like this but 100 billion doesn’t even scratch an itch in a war 🤔
This is not the world's longest underwater tunnel!!😅 The world's longest underwater tunnel is being built in Norway and is called Rogfast it is 26.7 kilometers long 😅
That is only a Road tunnel. If its ever get finished with the amount of Halt and changes to the project, Constructing a tunnel for cars is massively easier than to construct a Train and Car tunnel with double tracks. But ill admit, At a depth of 392m underneath the Sea is absolutely bonkers. And it will be the deepest tunnel when its complete.
I watched a whole documentary on this not long ago, one of the coolest projects at happening in the world right now, can’t wait to see what else you do with it
I have been a Carpenter for 40 years, and this sort of project is enough to make your head spin. Making a machine to pre assemble the reo-bar is mind-blowing, but it is necessary to take away the human element, which could easily introduce flaws into the reo cage. The placement of the concrete is by pump booms and vibration to ensure proper compaction, super critical in an underwater environment.
Aaron and his colleagues are very fortunate to be able to visit all of these amazing places and projects around the world and yo share them with us.
Mark from Melbourne Australia
Every single comment or close is wrong...
1. It's a rebar, not a reo-bar
2. The reason of the machine for the rebar is not to remove the human element, but because usually rebars are tied with tiny steel cables. Here they are welded to stay in place and remain recise during the movements, but also and mostly because they assemble it flat, and then lift it. It's VERY unsafe to lift those cages without welding. Doing the welding by hand is too slow. And it multiplies the time for the workers with the back down. So in terms of health, safety it's dumb.
BUT MOSTLY, it's the same segments. So it's repeatable. Therefore it makes sense. If it was not repeatable, a machine would make 0 sense. So nope, sorry for your assumptions.
Unlike what you think, moving the rebar by one centimetre of imprecision is not changing anything to the structure.
3. No the pump does NOT change anything about the compaction. There are several reasons for that choice.
- the volume that needs to be poured in a rather short period is massive
- they want a monolithic structure
- they are indoor
Why does that matter? They need to go at the right rhythm for the structure to be indeed monolithic. That rhythm might be possible outdoor with 2 cranes working on 2 sides of the structure. But indoor, with the overhead crane on rails, it would be so slow.
So there is no choice, the pump is the only solution to be productive and to end up with a monolithic structure. And it's the safest. And you can see that they use at least 4 pumps. Impossible to work with as many pouring teams in such a short space with a crane.
4. Yes the vibration is important... But guess what, it's as important in a tunnel, in a building, on a runway, etc... It's a critical phase of pouring concrete anyway. But here it's much easier because the environment is controlled, the concrete has an optimal flow and resistance, and they can stay consistant, which is close to impossible outdoor.
I'm proud to be part of this project 😊
thanks for making it happen!!
The company behind this actually has livestream videos available on their channel for anyone that is interested :)
Incredible! Visiting that tunnel will be a bucket list trip for me
3:00 It’s incredible that they can build such a large project with only 1 ton of steel 😅
Absolutly insane, tank you for sharing
0:38 There actually used to be train service across the Fehmarn belt. The trains would go onto the ferry. You can still see the rails on Google Maps at the ferry dock.
I don’t think that runs anymore but they did try ir
@@AaronWitt They didn't just try. The ferries carried trains from 1963 to 2019. They only stopped because the train lines leading to the ferry terminals are now in the process of being upgraded for the new tunnel. Edit: And before that there had already been a train ferry between Warnemünde in Germany and Gedser in Denmark since 1886. After WW2 Warnemünde was in East Germany, so a new train ferry from Großenbrode to Gedser was established in 1951, which was then replaced by the Puttgarden (Fehmarn) to Rødby ferry in 1963 after a bridge connecting Fehmarn to the (West) German mainland had been built.
The ferries between New Zealand's North and Sound Islands have rails. Rail cars with freight travel on the ferries.
@@RangieNZ Yeah, this isn't the only train ferry connection in the world by any means. There are about two dozen or so currently operating around the world, and more than a hundred former ones that are now defunct.
Always showing us the coolest construction projects. Thanks Aaron
Floating a 73k ton lego.. Humans are amazing. Thanks for sharing. Great channel. 💥💥
Immersed tunnels where invented in the Netherlands before WWII, and now Dutch companies are also working on this project.
15:23 - 73,000 tons of concrete-engineering marvels like this are redefining underwater construction!
Wow! This level of construction is what makes the impossible possible.
it’s insane how us “monkeys” managed to move 150 million pounds in one go….
The scale is insane
This project is one of the biggest engineering flexes I’ve ever seen 😮😂
You should check the Norwegian floating tunnel highway !
Unlike this project safely at the bottom of the sea, it will be floating in a fjord, but the tunnel part will be underwater.
th-cam.com/video/WMbSzFf_wTc/w-d-xo.html
@ ok wow 😮
Thanks for sharing! ❤️
That's similar to China Shenzhen-Zhongshan mega link bridge that was open last June of 2024
@@xiv3r This link is more like the Öresund Bridge.
Here, on both sides they plunge in a tunnel from the banks, there is no bridge section.
But indeed, the tunnelling method seems to be similar.
BUT this technology isn't new although it's not common.
Examples?
- Bouwdok Barendrecht (2012)
- Transbay Tube (1969)
- Hong Kong-Zhuhai-Macau Bridge (2010)
- Drogdentunnelen (following the Öresund bridge (2000)
The technique has been used since the 1950s,
What changed with the example here, and the one you mentioned is the scale, and the industrialisation of the serial production as the projects are larger.
Now a video to show the rest of the process. Surely the dredging and placement is just as impressive.
Part 2 is coming soon!
Great video! Here in New Zealand we have a north and south islands with a gape of 15k at the closest points and intercepted by the Cook Strait which is deep and notoriously rough at times. There has been talk of a bridge construction to join the islands but has never gotten past a serious standing around a coffee machine discussion! Watching this video shows that it could possibly work in New Zealand with the modern technology available today, the biggest problem we have though is our population is less than 6 million, so i am guessing we will need to be approaching something like 20 million people before any serious progress for a permanent link between the islands to happen
10:14 "The whole idea is to cast every SEGMENT in the same environment" 😉
Absolutely incredible amounts of engineering! I have so many questions. Excited to see part 2!
Welcome to Denmark!
Very impressive undertaking and a good candidate for progress updates. Looking forward to Part II, thanks for sharing.
Great video! Can you make some longer ones? I imagine a lot of your footage was cut. It would be fascinating to see the full content on a second channel.
That's one slick operation. From design and engineering to completing a segment it's quite impressive. Well documented as usual by a visionary YT channel creator. Cheers.
thanks Rick
Aaron please turn up the volume on your videos some of them are really quiet and please do a follow up video to this one I would love to know how they connect the tunnel sections under water 💧
Maybe you didn't hear it because the volume was too low, but he said at the beginning that this was part 1, with part 2 covering exactly that.
These people are littery floating massive concrete tunnels, but Americans can't figure out roundabouts.
Cool video. You and your team killed it
thank you very much
I worked on the second Severn crossing in the precasting sheds making deck and pier sections,but this makes our efforts look small fry. Great vid.
Another banger Aaron, you make it all look and sound so epic also props for being on top of all these insane projects and getting there to show us all. Keep it up!
Thanks for visiting our contry
we loved it!!
89 segments is honestly far less than i would have expected
Pretty impressive.
That is an absolutely genius engineering project, so cool, thanks for sharing
thanks for watching
Amazing!
What an awesome project! Aaron, you and the B1M make exceptional construction videos 👍🏻
Looking forward to part 2, and even more videos on this project if you can.
Man if you go back just a few years this would have probably costed somwhere in the 50-75 billions that just tells you how fast technology has evolved.
We built one twice as long 30 years ago and it only cost 15b adjusted for inflation (9b at the time)
The absolutely crazy thing is that in Québec, there was a proposed tunnel project, and from the outset, it was evaluated at well over 10 billions. The gap to cross is shorter. The portion that crosses the St-Laurence is somewhat tricky, but the rest of the project would have been in good hard rock. We simply cannot seem to be able to build infrastructure at a reasonable price in North America.
The bridge you take going to long way is pretty spectacular.
Maybe you can visit the Brenner Base Tunnel in Austria which will be the longest tunnel in the world (with the existing part in Innsbruck)
AMAZING
That is a very impressive project, thanks for sharing.
Thank you for watching!
Awesome❤❤
HEEEEEEY here it is, thanks man :D
Perhaps this tunnel production site could make segments for other tunnel projects, after this first tunnel is complete.
For example a tunnel connection between Finland and Estoni, to allow the new Baltic rail line to connect with Finland.
they're considering it
welcome to Viking Land :D
Think Aaron was impressed by the magnet 🤔🤣 unreal project been following it with a while now Coz there’s an 🇮🇪 guy driving a massive digger, he’ll be on next video 🤞🏻 so overall great to get this insight 👌🏻😍
I love magnets
Just a real comment with enough words to compensate for the bot comments, which will hopefully be deleted soon.
gay pride
Thank you
You make such good videos i love every one you do i would love to do it to with you ❤
Thats a massive sanny
It is also part of the strategic south to north cargo trail. Only possible thanks to eu, otherwise so many countries wouldn’t agree on such rail.
Hey Aaron,love the videos. Been watching a few years now. I'm having volume issues. It's very low on this one. I've got the TV cranked way up. I believe in you. Fix that shyt
it's fine on our end so I'm not sure why it's that way for you
10:15 pretty sure he said "segment" not "second"
Oops
I bought a Spider holster for my cameras; I paid full retail for mine and have nothing to gain from suggesting them but you might like them.
This is incredibly impressive. I imagine this was also engineered to be repaired as necessary once in place. I'm thinking the watertight gaskets in between each element would need to be replaced periodically right?
No never, Its a special compound that are only needed to actually place the segment and connect it to the other segments, It uses Vacuum to completely connect it in.
And then it will get a seal from the inside. So its only to actually connect the segments together.
Trelleborg Marine & Infrastructure is experienced in sealing immersed tunnels !
They use:
- Gina gaskets th-cam.com/video/9qIEZOf8EPk/w-d-xo.html
- Omega seals (clamped inside the tunnel) th-cam.com/video/R3mEHLNnyAE/w-d-xo.html
Designed to last 120 years. Pressure test between the two seals before removing the bulkheads.
They supply the bulkhead seals (for the whole project, reusable systems).
And for more info on their job: th-cam.com/video/A1JUWBelfeg/w-d-xo.html
There are the joints between the sub-segments for which they also supply the sealing solution.
At the end, the tunnel is covered by gravels.
I am curious/amazed regarding your level of access to this project. And I find it very interesting. You know, (of course) about the Ted Williams Tunnel in Boston. The elements were built in Alabama ??? and then floated to Boston.
Germany hasn't even begun to build the connection yet as far as I'm aware 😂
Well, the connection already exists. It's supposed to be expanded to two lines and electrified though, and that's behind schedule (of course). They started on it though.
@Sp4mMe rail connection is still in the planning phase as far as I'm aware
@@EinfachFredhaftGaming It's part of the railway line Bahnstrecke Lübeck-Puttgarden; completed in the late 1920s. There used to be train ferries crossing there - just take a look at google earth if you don't trust DB that much. The train tracks are right at the ferry harbor next to the tunnel already.
Like I said the connection is supposed to be improved (6 projects in total) and that's in various stages. But fundamentally, a single-track connection is already in place.
And not even talking about the Brand new Highway upgrade they have promised.
They need to get their shit together, most of the construction of the actually arrival point are well underway. But its up to the Germans to construct the aditionel Rail and Access way.
you could explain how the finished tunnel will be prevented from floating up off the sea floor
@mmm365 sand could get carried away by current, but i suppose a lot of big boulders would work
1. A trench is prepared to welcome the tunnel.
2. The trench will be prepared with some gravels to have an ideal surface to receive it.
3. They transport the segments that float.
4. They arrive in position, and fill them with enough water in ballast tanks for them to sink slowly enough to be able to manoeuvre and position them properly.
5. There are some kind of jacking systems when they are at the bottom of the see so the new segment can come and squeeze the seals to the existing segments in place.
6. The water between the seals is removed, and the segments are pressure tested (2 Trellbord Gina and Omega seals)
7. Once they are positioned, they add ballast concrete, and remove the water in the ballast tanks. They end up not being boyant anymore.
8 The bulkheads are removed
9. The tunnels are recovered with gravels, and with the local conditions so the habitat can be re-established by the fauna / flora.
Note: It's a very simplified description of all the elements to ensure of the perfect positioning, the controls performed, etc...
@@fabr5747 Where did you get that? Adding ballast on the inside just takes away usable space. I can't post links but search yt for "Construction of the Fehmarnbelt Tunnel (animation)" where they show not only that they'll use rocks up top to keep it down, but also the alignment mechanisms.
there are ballast areas within the elements
I see a lot of room for improvement.... at least space for another 400 workers that can replace all of those robots and automation.
How do they waterproof the elements? Isn't concrete porous?
okay so they put the bulkheads in for transport but how do they remove them once in place?
Fehmarn, u have a title typo here
Aaron Witt is slowly becoming my favourite construction youtuber
you're too kind
Danmark nævnt i midierne 🎉🎉
So many questions.
That huge factory and floating basin... Did they build that whole set-up just for this one tunnel project, or is it a factory that can make various sections for any tunnel project in northern Europe? Seems a waste to go through all of that just for one project.
Here's hoping that these structures will be adequately protected against "accidental"... contact with ships who just so happen to forget to raise their anchors while underway. The same ones who are crewed by one certain special Eastern European nation.
No point actually. because it will be buried underneath the seabed. They will cover the whole tunnel and the seabed will be where it is today.
They have drenched a 18 Km long and 12M deep Trench on the bottom of the sea. So it will be under the seabed.
thank you
I'd say they'll need more than a tonne of steel. Probably at least two tonnes I'd say. 😂
When is the project completion date?
2029
Tunnel Segments are similar to China amphibious Shenzhen-Zhongshan bridge
How many times is this guy going to say element
take a shot every time
the rubber gasket in-between each segment will wear out
Its not actually rubber, its a special compound and it will use the vacuum to seal it completely shut.
Designed to live 120 years. Trellborg is specialised in this, they have tens of projects of this type.
And if required, they will find solutions anyway for repairs, if not already taken into account.
I'll have the project engineers reach out to you muckfoot -- they must not have thought that through but you seem to know
two lanes of street traffic per direction
how they can change that gasket in the future
when is part 2
French engineer spotted
Am I missing something but isnt the channel tunnel like 50km long? You said this is 18km long and the longest underwater tunnel?
Nope its 18Km.
The channel tunnel is not inside of the sea. It's below the sea, inside the rock.
This tunnel is an immersed tunnel. So that's the difference. The channel tunnel was challenging because of the geology, they had to go to areas that would reduce to close to 0 the risk to be flooded while using a TBM.
Here, they are at the bottom of the sea, and not in the rock under it.
So here you have the distinction.
And it's not a matter of making small distinctions to get a record on paper (like antennas on skyscrapers). It's a completely different type of projects, with its unique set of challenges. It is an exceptional project for this type of construction selected.
fabr5747 sort of already said it, but the channel tunnel was drilled, whereas the Femarn belt is built from elements lowered onto/into the seafloor. It's the longest built with this technology.
How are they going to deal with the rubber gasket's breaking down is my first question. Then there's the limited lifespan of concrete and rebar, let alone a saltwater environment. More than my simple layman brain can handle when thinking of the cost of this endeavor.
Not a chance in hell I’ll ever willingly pass through that death trap.
9 billion to do unbelievable stuff like this but 100 billion doesn’t even scratch an itch in a war 🤔
It will not be the longest undersea tunnel it will actually be the Rogfast tunnel in Norway it will be 26,7 kilometers long
Channel tunnel is 50km long
@ car tunnel
ooo, a short tunnel under water. Welcome to Norway.. oh wait 😉
No reason to build a tunnel to Norway. They are not member of the EU and limit the import of goods.
its remind me of kaiju wall
We need a tunnel to America now
No thanks !
@fabr5747 why not a fan?
I ain't driving thru it w current American people building it. Boeing might be involved
@0:16 From Germany to SWEDEN, not Denmark.
You're driving from Germany to Sweden and Denmark is the country you have to drive through to get there.
Its not "how europe's building" its "how Denmark´s building" ..
Not I ; said the cat
This is not the world's longest underwater tunnel!!😅 The world's longest underwater tunnel is being built in Norway and is called Rogfast it is 26.7 kilometers long 😅
That is only a Road tunnel. If its ever get finished with the amount of Halt and changes to the project, Constructing a tunnel for cars is massively easier than to construct a Train and Car tunnel with double tracks.
But ill admit, At a depth of 392m underneath the Sea is absolutely bonkers. And it will be the deepest tunnel when its complete.