Content deleted Content added
No edit summary |
Convert |
||
Line 58:
===Blast protection===
Bunkers deflect the blast wave from nearby [[explosion]]s to prevent ear and internal injuries to people sheltering in the bunker. While frame buildings collapse from as little as {{cvt|3
The basic plan is to provide a structure that is very strong in [[compression (physical)|physical compression]]. The most common purpose-built structure is a buried, steel [[reinforced concrete]] [[Vault (architecture)|vault]] or [[arch]]. Most expedient blast shelters are civil engineering structures that contain large buried tubes or pipes such as sewage or rapid transit tunnels. Improvised purpose-built blast shelters normally use earthen arches or vaults. To form these, a narrow, {{convert|1|-|2
A large ground shock can move the walls of a bunker several centimeters in a few milliseconds. Bunkers designed for large ground shocks must have sprung internal buildings to protect inhabitants from the walls and floors.<ref>{{cite web|url=http://prepare-and-protect.net/2014/01/bunker-thoughts/|title=Bunker Thoughts|date=25 January 2014|website=prepare-and-protect.net|access-date=2 May 2018|url-status=live|archive-url=https://web.archive.org/web/20170930193410/http://prepare-and-protect.net/2014/01/bunker-thoughts/|archive-date=30 September 2017}}</ref>
Line 67:
{{See also|Fallout shelter}}
Nuclear bunkers must also cope with the underpressure that lasts for several seconds after the [[shock wave]] passes, and block [[radiation]]. Usually these features are easy to provide. The overburden ([[soil]]) and structure provide substantial radiation shielding, and the negative pressure is usually only {{frac|1
===General features===
| |||