It’s actually really fucking cool, for ones like this they cast them in concrete sections, seal the ends, float them out, and sink them into place! Practical engineering made a video about
My dad’s a retired civil engineer and I got to see how all this worked when he did one back in the day. I got to see the individual sections being built and then got to walk through the tunnel after the sections had been connected and before they were ready for traffic.
It’s actually really fucking cool, for ones like this they cast them in concrete sections, seal the ends, float them out, and sink them into place! Practical engineering made a video about
My dad’s a retired civil engineer and I got to see how all this worked when he did one back in the day. I got to see the individual sections being built and then got to walk through the tunnel after the sections had been connected and before they were ready for traffic.
This one?
https://www.youtube.com/watch?v=KclYKAnaJ_k
I didn’t know about this tunnel, but I imagine other ones are built by actually digging under ground right?
Different strategies for different situations!