GREEK ISLAND*

GREEK ISLAND*

*συνθηματική ονομασία μυστικού καταφυγίου του Αμερικάνικου Κογκρέσου

*code name of the secret bunker built to shelter the United States Congress members

Saturday 12 March 2011

Μαρία Νυμφιάδη / Maria Nymfiadi









Preparing the Home for War

Shortly before the outbreak of WW2 leaflets were sent out to every household and business around Britain, informing the population to prepare their homes for enemy bombing raids, the leaflets information on blackout protection, covering windows and doors with either thick black curtains or even painting windows black to prevent light from housing being seen from the air.

As well as blackout for windows people were advised to tape up windows to prevent flying shards of glass should a bomb explode in the vicinity

Gas Masks were issued to every member of the population in preparation for Gas attacks from the air and decontamination stations were set up in the event of a gas attack.

Morrison shelters were also issued "where available" for inside the home a Morrison shelter was a cage fitted around a bed which offered protection from rubble and debris if your home suffered a direct hit. The Morrison shelter was provided free to households whose total income was less than £350.00 a year.

Anderson Shelters which were mainly used in the suburbs rather than in the city, because city homes rarely had gardens, were sectional corrugated iron shelters intended for use in the back garden of the home, the shelters were built into holes in the ground at least one meter deep and the earth from the hole was then spread on top of the shelter for extra protection.

Because the Anderson shelters were partially underground they were cold, damp and draughty and if there was a heavy rainfall they would often flood, but lessons were learned and people started putting drainage systems in place to help prevent the flooding.

Although the Anderson shelter would not survive a direct hit they were good protection against near misses and flying fragments.

People were resourceful and came up with ingenious ways of heating their Anderson shelters, drinks could be kept warm in thermos flasks, or Hay bottles which were bags wrapped around bottles of hot liquid which were stuffed with Hay or wrapped up newspapers, a brick sat in front of the coal fire for an hour or 2 then wrapped in a woolen jumper would make a great bed warmer and a heater was made from a candle and two clay flowerpots place the candle in one of the flowerpots lighting it and putting the other flowerpot upside down on top of the other provided a great source of heat….

By jimmythejock

http://hubpages.com/hub/World-War-2-The-Home-Front-Home-Life

The Morrison Shelter

The Morrison shelter, officially termed Table (Morrison) Indoor Shelter, had a cage-like construction beneath it. It was designed by John Baker and named after Herbert Morrison, the Minister of Home Security at the time. It was the result of the realization that due to the lack of house cellars it was necessary to develop an effective type of indoor shelter. The shelters came in assembly kits, to be bolted together inside the home. They were approximately 6 ft 6 in (2 m) long, 4 ft (1.2 m) wide and 2 ft 6 in (0.75 m) high, had a solid 1/8 in (3 mm) steel plate “table” top, welded wire mesh sides, and a metal lath “mattress”- type floor. Altogether it had 359 parts and had 3 tools supplied with the pack.

The shelter was provided free to households whose combined income was less than £350 per year.

When Head of the Engineering Department at Cambridge University, Professor Sir John Baker (latterly Baron Baker) presented an undergraduate lecture on the principles of design of the shelter, as an interesting introduction to his theory of plastic design of structures; in 1968 this lecture was attended by Prince Charles, and it can be summarized as follows:

It was impractical to produce a design for mass production that could withstand a direct hit, and so it was a matter of selecting a suitable design target that would save lives in many cases of blast damage to bombed houses. Examination of bombed buildings indicated that in many instances, one end wall of a house was sucked or blown out by a nearby blast, and the floor of the first storey pivoted about its other end (supported by a largely intact wall) and killed the inhabitants. The Morrison shelter was therefore designed to be able to withstand the upper floor falling, of a typical two storey-house undergoing a partial collapse. The shelter was designed to absorb this energy by plastic deformation, since this can absorb two or three orders of magnitude more energy than elastic deformation. Its design enabled the family to sleep under the shelter at night or during raids, and to use it as a dining table in the daytime, making it a practical item in the house.

500,000 Morrison shelters had been distributed by the end of 1941, with a further 100,000 being added in 1943 to prepare the population for the expected German V-1 flying bomb (doodlebug) attacks.

In one examination of 44 severely damaged houses it was found that three people had been killed, 13 seriously injured, and 16 slightly injured out of a total of 136 people who had occupied Morrison shelters; thus 120 out of 136 escaped from severely bomb-damaged houses without serious injury. Furthermore it was discovered that the fatalities had occurred in a house which had suffered a direct hit, and some of the severely injured were in shelters sited incorrectly within the houses.

In July 1950 the Royal Commission on Awards to Inventors made an award of £3,000 to Baker for his design of the Morrison shelter (Baker 1978)

http://en.wikipedia.org/wiki/Air-raid_shelter

Other sites:

http://www.rayleighprimary.org.uk/Year4/MorrisonShelters.htm

http://www.spartacus.schoolnet.co.uk/2WWmorrisonshelter.htm

http://www.liverpoolmuseums.org.uk/nof/blitz/2200_info.html

http://www.exetermemories.co.uk/em/_story/story_69.php







Friday 11 March 2011

Μαρία Νυμφιάδη

Research on bunkers

A military bunker is a hardened shelter, often buried partly or fully underground, designed to protect the inhabitants from falling bombs or other attacks. They were used extensively in World War I, World War II, and the Cold War for weapons facilities, command and control centers, and storage facilities (for example, in the event of nuclear war).

Industrial

Typical industrial bunkers include mining sites, food storage areas, dumps for materials, data storage, and sometimes living quarters. They were built mainly by nations like Germany during World War II to protect important industries from aerial bombardment. Industrial bunkers are also built for control rooms of dangerous activities, e.g. tests of rocket engines or explosive experiments. They are also built in order to perform dangerous experiments in them or to store radioactive or explosive goods. Such bunkers also exist on non-military facilities.

Personal

When a house is purpose-built with a bunker, the normal location is a reinforced below-ground bathroom with large cabinets. One common design approach uses fiber-reinforced plastic shells. Compressive protection may be provided by inexpensive earth arching. The overburden is designed to shield from radiation. To prevent the shelter from floating to the surface in high groundwater, some designs have a skirt held-down with the overburden. It may also serve the purpose of a safe room

Blast protection

Bunkers deflect the blast wave from nearby explosions to prevent ear and internal injuries to people sheltering in the bunker. While frame buildings collapse from as little as 3 psi (0.2 bar) of overpressure, bunkers are regularly constructed to survive several hundred psi (over 10 bar). This substantially decreases the likelihood that a bomb (other than a bunker buster) can harm the structure.

The basic plan is to provide a structure that is very strong in physical compression. The most common purpose-built structure is a buried, steel reinforced concrete vault or arch. Most expedient (makeshift) 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 (1-2 meter) flexible tent of thin wood is placed in a deep trench (usually the apex is below grade), and then covered with cloth or plastic, and then covered with 1–2 meters of tamped earth.

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.

From the site: http://en.wikipedia.org/wiki/Bunker

Στην Ελλάδα υπάρχουν εκατοντάδες μόνιμα ή ημιμόνιμα οχυρωματικά έργα, καταφύγια και εγκαταστάσεις, διασκορπισμένα κατά μήκος των χερσαίων μας συνόρων, στο σιδηροδρομικό και οδικό δίκτυο, σε σημαντικά περάσματα στο εσωτερικό της χώρας, σε νησιά και σε παράκτιες περιοχές. 'Ένα μεγάλο μέρος από αυτά κτίστηκε από τα στρατεύματα κατοχής με σκοπό την φύλαξη του συγκοινωνιακού δικτύου της χώρας και την προστασία των κατακτημένων περιοχών από πιθανή απόβαση των συμμάχων.

Απόσπασμα από το site: http://www.fortifications.gr/index.html

Πεκίνο: Εκκένωση των μπούνκερ όπου μένουν 1 εκ. Κινέζοι

Την απόφαση να εκκενωθούν τα παλιά αντιαεροπορικά καταφύγια (μπούνκερ) της πόλης του Πεκίνου, όπου σήμερα ζουν περίπου 1 εκατομμύριο Κινέζοι, έλαβαν οι κινεζικές αρχές. Στη θέση τους προβλέπεται η δημιουργία πάρκινγκ και χώρων αναψυχής.

Οι δημοτικές αρχές του Πεκίνου αποφάσισαν ότι τα μπούνκερ αποτελούν «ντροπή» για την πρωτεύουσα μιας ανερχόμενης δύναμης και οι κάτοικοί τους θα πρέπει να τα έχουν εγκαταλείψει μέσα στο πρώτο εξάμηνο της χρονιάς, για να δώσουν τη θέση τους σε χώρους στάθμευσης και ψυχαγωγίας για τους κατοίκους των γύρω συγκροτημάτων.

Στις υπόγειες γειτονιές της κινεζικής πρωτεύουσας των 22 εκατομμυρίων κατοίκων, έχουν βρει καταφύγιο κατά κύριο λόγο οι πενιχρά αμειβόμενοι εσωτερικοί μετανάστες και οι άνεργοι πτυχιούχοι. Ένα τυπικό καταφύγιο διαθέτει 100-150 δωμάτια, περίπου 5-8 τ.μ. το καθένα, και το μέσο ενοίκιο ανέρχεται στα 35,2 ευρώ το μήνα. «Οι συνθήκες υγιεινής είναι άθλιες και συχνά ξεσπούν φασαρίες μεταξύ των ενοίκων» δήλωσε ο υπεύθυνος του τοπικού Γραφείου Πολιτικής Άμυνας, Γουάνγκ Γιόνγκξιν.

Η κινεζική πρωτεύουσα διαθέτει ένα τεράστιο δίκτυο από υπόγειες σήραγγες, συνολικού μήκους 45 χλμ. το οποίο ξεκινά από το κέντρο της πόλης και φτάνει ως τα όρια του Σινικού Τείχους. Τα περισσότερα από τα καταφύγια αυτά κατασκευάστηκαν το ’69, σε μια εποχή κατά την οποία η Κίνα ζούσε με το φόβο ότι θα μπορεί να γινόταν στόχος των σοβιετικών πυραύλων. Οι διαχειριστές των μπούνκερ τα νοικιάζουν από το κράτος και τα έχουν μετατρέψει σε πανσιόν, οι οποίες είναι μάλιστα και περιζήτητες. Αξίζει να σημειωθεί ότι αυτή τη στιγμή δεν υπάρχει ούτε ένα ξενοίκιαστο διαμέρισμα όχι μόνο λόγω της πληθυσμιακής έκρηξης αλλά και γιατί οι τιμές των ακινήτων έχουν εκτοξευθεί στα ύψη…

Απόσπασμα από άρθρο του tvxsteam site: http://www.tvxs.gr/users/tvxsteam

Other sites:

Gaddafi’s bunker http://www.youtube.com/watch?v=7L1hWPGVcB0

Images from Bunkers, drawings, inscribed symbols, dates

From the site: http://www.bunkerart.nl/welcome.html