What is the name of this machine and how does it work?

Question

https://ibb.co/3RBCZqs

https://ibb.co/Y2Y5qvK

https://ibb.co/hdHCRw1

https://ibb.co/xYSNJZd

Swamps outside New Orleans.

In: Engineering

Answer 1

It’s a bridge building machine. You can see that it is putting in those support structures one at a time, laying the road/track bed on top, and then moving forward to repeat the process.