Thanks for the correction. Interesting about the clay. Is hardpan stronger then concrete blocks and mortar?
I've been thinking of the same thing back and forth for a while, but I keep coming back to the same challenge; Walling material. Everyone keeps telling me the walls will cave in if I don't go get brand new materials and consult professional building companies.
In my case I would build an underground greenhouse, basically a square/ rectangular hole with used windows for roofing. The thought ocurred to me to just lower a used shipping container down that hole, and cut away the roof and put in the same windows here. Apparently the walls would either cave in from the pressure of the soil, or rust away within a year or two.
Does this seem plausible to you, or are the people I'm speaking to about this just being negative, which I'm getting a sense of?
If you can reinforce around it, just using the container for waterproofing, basically, then it would work for underground.
Most if not all "underground homes/building" are only 10 or so feet deep under ground. Does anyone know of techniques and ideas for deeper building/living? I know some mining companies dig caves for vineyards. I would assume that type of construction would be extremely costly. Pumping out and throwing a glazed roof on an old rock quarry would be pretty cool. Growing full size trees indoors and and such.
Ok, do you have a link to read about how he does it? Thanks