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The cost of underground construction varies significantly depending on local geological, soil, and water table conditions. In some areas with deep well drained
by jmccree 13y ago
The cost of underground construction varies significantly depending on local geological, soil, and water table conditions. In some areas with deep well drained soil underground construction is relatively cheap, as it's basically just earth moving. In others you hit granite bedrock after a few feet and you have to excavate the bed rock to go deeper. It's certainly possible to expand out from a basement, and every so often the news shows footage of elaborate underground tunnels for drug manufacturing etc beneath a normal house.
If you're interested in underground structures, you should check out limestone mines converted to office space or storage like subtropolis. They mine the limestone of a solid horizontal layer leaving pillars to support the "roof", creating an entire underground building millions of sqft and acres in size. Subtropolis is over one thousand acres.
- Someone 13y agoFor subtropolis, see http://en.wikipedia.org/wiki/SubTropolis http://en.wikipedia.org/wiki/SubTropolis. From there, http://www.huntmidwest.com/subtropolis/index.html http://www.huntmidwest.com/subtropolis/index.html gives you the site of the business. I find their brochure gives a good idea about what it looks like: http://huntmidwest.com/pdfs/subtropolis_brochure_2012.pdf http://huntmidwest.com/pdfs/subtropolis_brochure_2012.pdf Impressive, but way more industrial than, for example, the centuries old limestone caves in the Belgian-Dutch-German border area (http://maastricht-students.com/2012/07/millions-of-years-of-history-in-caves/ http://maastricht-students.com/2012/07/millions-of-years-of-..., http://www.tripadvisor.com/Attraction_Review-g188575-d318667-Reviews-St_Pietersberg_Caves-Maastricht_Limburg_Province.html http://www.tripadvisor.com/Attraction_Review-g188575-d318667...)