@Jonah_Anthony
It would be fun if you started a small series called "impractical engineering" where you cover failed engineering or construction plans
@tjarsun
I'm from Argentina, and we have a tunnel crossing Paraná river, connecting two states. The reason they couldn't use a bridge was bureaucracy: the space above bodies of water is federal jurisdiction, and the government didn't approve of making a bridge. But the river itself is state's jurisdiction, so the two state's governments joined up and made a tunnel.
@daanwilmer
Being Dutch, from the west of Rotterdam, two tunnels have been built using this method in my 30-something year lifetime: the new Benelux tunnel and the Maasdelta tunnel. Interesting fact: during the installation of one of the segments of the Maasdelta tunnel, a winch cable broke. This didn't cause much damage except for a delay of a few days, but the reason is quite interesting. Because this tunnel is quite close to the North Sea, there is a layer of salt water near the bottom of the river, and the river water has to flow over that layer. This was al taken into account for the strength calculations of the winches, but not the fact that the shape was different due to the way the river bed had been dredged. This caused the salt water layer to sit higher, leaving less space for the river water, leading to a stronger current, leading to more force than the winch cable could take. Mind blowing complexity!
@FluidMech-d3t
I was a diver working on a tunnel project a few years back. Connecting the hydraulic jacks to bring the sections together was pretty cool. I have been on a lot of large infrastructure projects, but that one was by far the most interesting.
@PeterCarky
Hi, Grady! I just graduated high school and am starting college this fall, where I'll be majoring in Civil Engineering. I just wanted to thank you for making these videos that we can all watch for free. I was always interested in Civil Engineering, but your channel really helped me to discover how passionate I was about it, and I couldn't be more excited to start studying it at college. I ended up getting your book and loved reading that, too, and I recommend you to just about everyone I can. I know your channel really inspired me and helped me to find my calling, so I hope you continue making these videos, not just to inspire future engineers, but also to just share how fascinating the constructed environment around us is, something that I think can be easily taken for granted. Truly, thanks for all you do!
@盾神京矢
In Hong Kong, there are 6 tunnels (3 for trains, 2 for road vehicles and 1 for both trains and vehicles) crossing the Victoria Harbour. Some, if not all of them were built using the method of immerse tube tunnelling. They might not be the longest or the deepest or the widest tunnels in the world, but the density of tunnels in the Victoria Harbour is probably the highest in the world. This shows how densely populated the city is, requiring 6 tunnels to move people around.
@tealkerberus748
The more civil engineering related channels YouTube suggests to me, the more I appreciate this one. I encountered a channel yesterday that from its titles had some interesting content, but the visual was talking-head-on-AI-greenscreen which hurts my eyes to look at, and then they had comments switched off, on every vid I checked. You can't engage with someone who isn't looking for engagement! Good to be here, learning a bite more about the engineering world.
@3henry214
I grew up in San Francisco and was 16 years old when BART was being constructed. I watched the completed sections of the Transbay tube being towed out to their positions and submerged in the bay. I've always been curious about how the Transbay tube was constructed... 56 years later, I finally have my answer. Thank You!
@PetervanGinneken
I"m Dutch and this is the most used technique for building submerged tunnels in the Netherlands. Thank you for making a video i can use as an illustration for this impressive method of construction.
@jiiaga5017
This tunnel video certainly isn't boring!
@TedCarnahan
I just realized that "Grady" being a civil engineer is classic nominative determinism. :) Nice video.
@EssensOrAccidens
Grady really has become a top-notch YT creator. He was always good, but he's continued to develop. Hats off to him.
@Machines.In.Action
Although I have absolutely no background in construction, architecture, engineering etc. these videos continue to fascinate me. It's absolutely amazing how human ingenuity made it possible for us to build massive cities, giant bridges, tunnels, dams etc. Incredible! :hand-orange-covering-eyes:
@scottrobinson432
I was heavy equipment operator for 45 years all are work was DOD or army corps of engineers and ever time I watch one of Grady videos I learn something new Good Job Grady keep them coming love the videos
@hibryd7481
Hearing an engineer say "Normally, you'd really want to take your time with this kind of thing, but..." makes me break out in a cold sweat. 🥶
@karl1ok
Here in Oslo, Norway we used this technique to extend the motorway tunnel that goes under downtown and the inner harbor. The existence of a whole new part of the city (Bjørvika) is thanks to this building method. The tunnel is called Operatunnelen and even has murals to show what buildings you drive under!
@qkrotor
Grady, what you are doing with this channel is immensely valuable. Your enthusiasm for engineering is contagious and you have a gift for explaining things. The world could use a few more people like you, especially now!
@FrederikEngelmand
amazing to see us here in Denmark doing just this across the Femern belt! PROUD!
@kylerussell517
Pre-fab is so cool. At this scale, even more cool. I enjoy this. Another please.
@PracticalEngineeringChannel