Another building system for below ground structures... Zip Blox

Think - adult sized Lego blocks.

 

looks a lot like the arch building system used as far back as ancient Rome?

 

Yes, but can assembled with a very small (4 man) crew.

 

and a lot of equipment like a big truck?

 

Pretty trick, very like Roman arches, but I wonder a few things.
-What do the front and back walls look like?
-The vid sorta shows the first course laid directly on dirt. Did I miss seeing some footings?
-How was waterproofing accomplished?
(The truck mounted falsework was a pretty good engineering trick.)

 

IDK, I just kept watching, and thinking, "He's got that backhoe WAY too close to the edge of that hole!

Interesting construction, though.

 

I bet that could be done with foam blocks cheaper and easier and more insulation value .