05/03/2025
The tunnel boring machine is one of the most important machines in the current era for building the infrastructure of major cities...,
The tunnel boring machine "Bertha" that you see in the picture is more than 90 meters long... and its diameter is 17.5 meters, meaning that it is the length of a five-story building, which makes it gigantic in every sense of the word.
One of the latest works done by this extraordinary machine was digging a tunnel near the American city of "Seattle"..., where it was transported there in the form of 31 separate pieces, and reassembled again because transporting it as one piece is not possible due to its large size, and its weight of about 7000 tons.
