DIGGING A SECRET TUNNEL part 4

A video on YouTube. In Maker & Builds, a Krater category.

Summary by Krater

Colin Furze builds and installs steel wall liners and floors for his underground tunnel leading from his shed, welding sections together and pouring concrete around them.

From the video

Answers: How do you build and install steel wall liners in an underground tunnel?

underground tunnel construction
steel wall lining installation
concrete pouring for tunnel support
welding steel plates

What it concludes

The steel wall liners create a solid, level tunnel structure when welded and reinforced with concrete.

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