this is my idea of a shelter, where for a few days at least one can get away from the elements.
now, let us assume you have stone wall, or grassy bank to build against. . or at least use the back lawn, and asuming it is not built on top of rocks, dig a deep trench, and slowly expand this unti it is the size you require. maybe six foot by four foot. I would dig it at least eight feet maybe ten deep. Now, I would line this with breeze blocks, on a six inch concrete footing. don't use cinder blocks but six inch or even nine inch concrete breeze blocks. now, using 3/4 inch sheathing ply, which is waterproof, and weather proof, line the walls with this and also the floor. this will alow movement in the groud and walls, whilst keeping the shelter reasonably intact. I would also line the floor with some building fabric, or thick polythene as an added measure to keep out the ground water. the walls also should be lined this way. One thought, I strongly suggest a sump be dug at one end or even at both ends, to contain any water seepeage. say about two or three foot deep. Now, I would place four by two or even six by two inch wooden battons against the walls, and cross members between them to add strength to the structure.
now, on the roof, I would use either four or six by two angle irons or equally strong wooden joists , along the roof, and on these I would place more sheathing ply. finally, this would be lined with more building fabric, or thick polythene and then the soil and turves can be carefully placed on the roof- which is vital
hatchways and such can be designed into this structure but the basic idea is to have something that will move with the earth, say in an earth quake or storm, yet maintain its structural integrity. the ceiling can be strengthened by posts down the centre, as well. it can be made into compartments quite easily, for privacy, though there will by limitations on how large it overall , can be built. I assume it will be handy for a week or even two, if things get really hairy. maybe longer.
so, we have shelter thats can be built in a few weeks, maybe even a week with effort. one can hire a small excavator for a week, and the breeze block can easily be laid, I n fact I would concrete the whole floor, except for the fact concrete cracks whereas a block lined floor is far more flexible.
notes;;;
the ceiling is better lined with corrugated iron, galvanised if possible. if thus is available the walls easily be lined with it also. the whole idea is to have a shelter that is highly flexible and waterproof. the sumps in the floor are vital for if the monsoons start, water will be everywhere
one last note, inspired by Cheryls posting which I have to read in full yet, it may be possible to sink some steel cabins of sorts into the tench, connecting each one , but still using the basic construction methods i.e. block walls and floors as these will be flexible if the earth moves. once the basics are in place one van elaborate if better materials and money are available.
the earth placed over the roof is absolutely vital. this will give protection against a CME, and dangerous ultra violet levels. plus again we have its flexibility in earth movements.
Stay tuned for updates folks!!!!
Comments
the above is the basic structure. it occurred to me afterwards, one must incorporate, 4 or six inch plastic pipes to the surface, for ventilation. these must have cowls on them and the ends must have seals in case the waters rise. also they can be made telescopic. another idea , in areas where earthquakes are common, is to use several layers of reinforcing mesh on the bottom, then sheathing ply, then build a block floor on this. the weight will hold it down but the mesh will have a spring effect. thus we have more flexibility. all the materials I mention are free from fumes, even the plastic should be safe. if power is available one can always have an extraction fan such as used in a bathroom. these can by fixed to the plastic pipes. to the surface.
the most important thing is to have at least one sump, about three feet deep. water is always problem, but the shelter should last a few weeks at least.