If you are familiar with the ZetaTalk trench shelter, please read this first blog as it talks about the deficiencies inherent in that design.
https://earthchanges.ning.com/profiles/blogs/zt-analysis-are-trench.
These next blogs are culminations of group efforts and cover as many scenarios as we could think of and modifications that could make the shallow trench shelter a more secure shelter.
A Plastic Tunnel -- A Way To Avoid Electrocution by Ground Electricity
earthchanges.ning.com/profiles/blogs/ideas-for-bunkers-a-plastic-tunnel-portable-ideal-for-those-who
Another Idea For A Trench Shelter
https://earthchanges.ning.com/profiles/blogs/another-idea-for-a-trench
The issue of radiation (solar or nuclear) was raised and this blog talks about it and how to protect yourself:
Yet More About The Inadequacies Of Shallow Trench Shelters
https://earthchanges.ning.com/profiles/blogs/zetatalk-yet-more-about-the-inadequacies-of-shallow-trench
This was my original version of a enhanced shallow trench shelter, with a ferro-cement dome:
My Idea Of A Trench Shelter
https://earthchanges.ning.com/group/survivalinformation/forum/topics/my-idea-of-a-trench-shelter
(Sorry, the link to the sunlife site still works but the information is no longer available. You can look around for another site with plans to build a ROUND dome--don't go geodesic, it is reported there are high divorce rates associated with it, thus it seems to amplify bad vibes.)
Other options:
Mini blast & fallout shelter-good for tornadoes, storage, etc.
https://earthchanges.ning.com/profiles/blogs/mini-blast-amp-fallout
Earthbag Structures
https://earthchanges.ning.com/profiles/blogs/shelters-earthbags
Resistant to earthquakes, flooding, severe weather
Ferro-Cement Structures
https://earthchanges.ning.com/profiles/blogs/ferrocement-shelters-amp-boats
Extremely strong.
DuPont's Kevlar Bunkers
https://earthchanges.ning.com/profiles/blogs/duponts-kevlar-bunkers-offer
Tornado Safe Room
https://earthchanges.ning.com/profiles/blogs/tornado-safe-room
Pet Shelters
https://earthchanges.ning.com/profiles/blogs/pet-shelters-the-1000-year
Mini Noah's Ark Shelters
http://www.cbc.ca/news/world/story/2011/09/30/noah-ark-japan-tsunami.html
https://earthchanges.ning.com/profiles/blogs/tsunami-fears-fuel-sale-of-mini-noah-s-arks
Comments
Chris Burying the steel culvert in the soil will cause condensation to the point of ugly black mildew, if you can insulate the culvert from the soil then you may stop it before it starts.
Right now, my plans are really simple.
I plan on cutting a 15 to 20 foot trench into the side of a hill, then backing in a travel trailer.
I'll then place logs over the opening and a layer of corrigated iron sheeting then a couple of feet of dirt.
The front opening will be logs and rocks.