Вопрос про строительство

Ivan22

Вот фотка, где гастарбайтеры строят самое высокое здание в мире:
 

У мя вопрос: как эти краны туда поднимаются (и опускаются соответственно)?

atsel

Вертолетом ?

flightplan

это из вики
The tower crane is a modern form of balance crane. Fixed to the ground (or "jacked up" and supported by the structure as the structure is being built tower cranes often give the best combination of height and lifting capacity and are used in the construction of tall buildings. To save space and to provide stability the vertical part of the crane is often braced onto the completed structure which is normally the concrete lift shaft in the center of the building. A horizontal boom is balanced asymmetrically across the top of the tower. Its short arm carries a counterweight of concrete blocks, and its long arm carries the lifting gear. The crane operator either sits in a cabin at the top of the tower or controls the crane by radio remote control from the ground, usually standing near the load. In the first case the operator's cabin is located at the top of the tower just below the horizontal boom. The boom is mounted on a slewing bearing and is rotated by means of a slewing motor. The lifting hook is operated by a system of sheaves.
A tower crane is usually assembled by a telescopic crane of smaller lifting capacity but greater height and in the case of tower cranes that have risen while constructing very tall skyscrapers, a smaller crane (or derrick) will sometimes be lifted to the roof of the completed tower to dismantle the tower crane afterwards. A self-assembling tower crane lifts itself off the ground using jacks, allowing the next section of the tower to be inserted at ground level. It is often claimed that a large fraction of the tower cranes in the world are in use in Dubai. The exact percentage remains an open question

и вот еще ссылка интерсная)
http://lesterama.org/blog/?p=10

Ivan22

спасибо!

lebuhoff

По каналу Дискавери частенько рассказывают про работу всяких там механизмов для бурения, прокладки тоннелей, установки нефтяных платформ. Одна из них была посвящена строительству небоскребов (правда, не этого) и показывались основные этапы строительства. Собственно, ответ прозвучал уже в трэде :D

andrey2107

Про этот или по дискавери или по нешнл джиографик показывали.. :D

Ivan22

а как передача называется?

kiritsev

вроде extreme engineering

lebuhoff

вроде extreme engineering
+1 и еще какая-то программа есть про сами строительные машины
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