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Post by missasip on Nov 3, 2013 18:10:08 GMT -7
I have had a long time interest in tunnels.
I think they have their place in preparedness. Even down in my neck of the woods temps and RH are better in a ventilated underground structure.
In my particular area, my property is on the side of a well drained hill. It perks exceptional. In fact though there is a large number on ponds around, they are all built in the lower part of ones property. And it takes a good bit of knowledge to built them. With coring the dam and and the claying the floor of a pond just to get it to hold water.
When digging the hole and ditch for my septic it was very apparent that water does not stay very long, even at 10'-15' depths.
Proper shoring methods would need to be studied to insure safety.
Anyway, what y'all think? Am I crazy, well that goes without saying....
Jimmy
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Post by Cwi555 on Nov 4, 2013 6:52:59 GMT -7
It can be done, but as you noted, proper study should be done first.
Arches are your friend. They distribute load far better than squared off rooms. Circles are even better. Get familiar with the various stresses involved, I.E. torsional, compression, tensile, shear, etc also Isotropic, cylinder, stresses and their variants.
Most importantly, look up working models in your area. It makes no sense to reinvent the wheel, and take chances on a new design.
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Post by offtrail on Nov 4, 2013 14:25:39 GMT -7
Arches have been used for ever and would be a good choice for any undeground bunker. One thing I would do is put in an emergency exit so you are not trapped. What you don't want is a bunker that becomes a prison.
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Post by missasip on Nov 4, 2013 14:41:00 GMT -7
My thoughts are pretty much an escape tunnel. Be able to go through the floor and into the tunnel to let myself out where no one sees me. Something to live in if the balloon went up is also a though.
This project would also be done where prying eyes would never know it's going on. Least that would be the plan...
Ventilation, drainage, light are some of the other considerations.
Watching these "southern neighbors" built their elaborate tunnels to cross the border with drugs is very interesting...there is quite a bit of info out there on tunnel construction...
Jimmy
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Post by carolina168181 on Nov 29, 2013 15:57:22 GMT -7
Viet cong dug tunnels from 6 ft deep to 60 ft deep depending on the need.They added airshafts,that were camouflaged,false entries,even a hospital area.
A tunnel would be a good shelter to survive a forest fire,tornados,etc.
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Post by Besttracker on Nov 29, 2013 16:02:09 GMT -7
Viet cong dug tunnels from 6 ft deep to 60 ft deep depending on the need.They added airshafts,that were camouflaged,false entries,even a hospital area. A tunnel would be a good shelter to survive a forest fire,tornados,etc. A very interesting topic for discussion . Tunnel Rats in Viet Nam - Laos and Cambodia might be a good source of info . My regards & thanks |
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Post by Cwi555 on Nov 29, 2013 18:02:50 GMT -7
Viet cong dug tunnels from 6 ft deep to 60 ft deep depending on the need.They added airshafts,that were camouflaged,false entries,even a hospital area. A tunnel would be a good shelter to survive a forest fire,tornados,etc. A very interesting topic for discussion . Tunnel Rats in Viet Nam - Laos and Cambodia might be a good source of info . My regards & thanks As I understand it, the Cu Chi tunnels and others like them started after the end of the Japanese occupation, and the onset of the French Indochina war around 1946 or so. By the end of that conflict, (1954) hostilities were already in progress between North and South Vietnam. While use of tunnels in warfare was not new, the manner in which the Chinese resistance used them during the second indochina war was. The Japanese had actually started the Vietnamese down that path by emulating the Chinese effort. For that matter, there are locations in the Philippines that the Japanese built and the same for the Pinoy resistance. Getting to point, it was not the idea of the vietcong as they took what the Japanese started, and built upon it for the duration of both the french indochina war, and the Vietnam war. That in mind, it can be said that the effort started in 1937, and didn't end until 1975 ( if it ever did ). This is something I've never understood about the Vietnam war. Who dropped the ball on the intelligence assessments? The powers that be had to know the Cu Chi existed. Why did they not do so something earlier rather than wait for it to kill American soldiers? |
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Post by thywar on Nov 29, 2013 19:39:42 GMT -7
Or if you're looking for recent tunnel activity just check the southern US border with Mexico
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Post by Cwi555 on Nov 29, 2013 21:01:19 GMT -7
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Post by insaneh on Dec 11, 2013 9:06:49 GMT -7
Jimmy, Maybe you should consult some experts. They're probably hanging out in your yard right now.  |
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Post by marc on Dec 11, 2013 10:34:51 GMT -7
Jimmy, Maybe you should consult some experts. They're probably hanging out in your yard right now.  |
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Post by cajunlady87 on Dec 11, 2013 10:53:58 GMT -7
I read "The Tunnels of Cu Chi" some time back. What I remember is how massive the network of tunnels were and the many trapdoors which led to them. Those were part of their strategy for the Viet Cong to hit quickly and be able to hide just as fast. When a tunnel got destroyed most of the time it was merely a section. Teams jumped on those quickly to make repairs to resume using it. It was also mentioned one tunnel ran right under the stage where Bob Hope and his USO troupe performed above.
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Post by thywar on Dec 11, 2013 18:24:33 GMT -7
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