برج خليفة أطول برج في العالم وأيقونة دبي المعمارية

Putzmeister created a new, super high-pressure trailer concrete pump, the BSA SHP-D, for this project. Burj Khalifa’s construction used 330,000 m3 (431,600 cu yd) of concrete and 55,000 tonnes (61,000 short tons; 54,000 long tons) of steel rebar, and construction took 22 million man-hours. Three tower cranes were used during the construction of the uppermost levels, each capable of lifting a 25-tonne load. Hyder Consulting’s role was to supervise construction, certify the architect’s design, and be the engineer and architect of record to the UAE authorities.
At the centre of the park is the water room, which is a series of pools and water jet fountains. It opened the 148th floor SKY level at 555 m (1,821 ft), giving it the highest observation deck in the world on 15 October 2014. However, in June 2016 the Shanghai Tower opened with an observation deck at a height of 561 metres, thus taking the title of the world’s highest observation deck. A 304-room Armani Hotel, the first of 4 by Armani, occupies 15 of the lower 39 floors.

Features

The design is reminiscent of Frank Lloyd Wright’s vision for The Illinois, a mile-high skyscraper designed for Chicago, as well as Chicago’s Lake Point Tower. When Adrian Smith was conceiving the project at SOM, he looked out his office window toward Lake Point Tower’s curved three-wing layout and thought, “There’s the prototype”. According to Strabala, Burj Khalifa was designed based on the 73 floor Tower Palace Three, an all-residential building in Seoul.

Observation Decks

Outside the Burj Khalifa, WET Enterprises designed a fountain system at a cost of Dh 800 million (US$217 million). On 26 October 2008, Emaar announced that based on results of a naming contest the fountain would be called the Dubai Fountain. The spire of Burj Khalifa is composed of more than 4,000 tonnes (4,400 short tons; 3,900 long tons) of structural steel. The central pinnacle pipe weighs 350 tonnes (390 short tons; 340 long tons) and has a height of 200 m (660 ft).

Observation deck

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• Due to its tubular system, proportionally only half the amount of steel was used in the construction, compared to the Empire State Building.

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• The firm had designed the Sears Tower in Chicago, a previous record holder for the world’s tallest building.

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• Under normal conditions, when all building maintenance units are operational, it takes 36 workers three to four months to clean the entire exterior.

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• According to Strabala, Burj Khalifa was designed based on the 73 floor Tower Palace Three, an all-residential building in Seoul.

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• The hotel was supposed to open on 18 March 2010, but after several delays, it finally opened to the public on 27 April 2010.
• Cooler concrete cures more evenly and is, therefore, less likely to set too quickly and crack.

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The Burj Khalifa was built primarily by workers from South Asia and East Asia. On 17 June 2008, there were about 7,500 skilled workers employed at the construction site. According to a BBC investigation and a Human Rights Watch report, the workers were housed in abysmal conditions, and worked long hours for low pay. Cooler concrete cures more evenly and is, therefore, less likely to set too quickly and crack. Samples were taken from test holes drilled to a depth of 140 metres, finding weak to very weak rock all the way. On the higher floors, the sun is seen for several minutes after it has set at ground level.

• Most of the workers involved in the riot returned the following day but refused to work.

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• Such a skyscraper, if located in Europe, would be the 11th tallest building on that continent.

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• Engineers initially considered installing the world’s first triple-deck elevators.

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• On the higher floors, the sun is seen for several minutes after it has set at ground level.

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• Khan’s contributions to the design of tall buildings have had a profound impact on architecture and engineering.

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• An outdoor zero-entry swimming pool is located on the 76th floor of the tower.

EMAAR ENTERTAINMENT

The hotel was supposed to open on 18 March 2010, but after several delays, it finally opened to the public on 27 April 2010. At the top, the central core emerges and is sculpted to form a finishing spire. The building was opened in 2010 as part of a new development called Downtown Dubai. The steel was shipped to Dubai after the Palace’s demolition was completed in 2008. Engineers initially considered installing the world’s first triple-deck elevators. The double-deckers are equipped with LCD displays to amuse visitors during their travel to Lucky Mister the observation deck.
This 244-metre (801 ft) spire is widely considered vanity height, since very little of its space is usable. Such a skyscraper, if located in Europe, would be the 11th tallest building on that continent. The firm had designed the Sears Tower in Chicago, a previous record holder for the world’s tallest building. Like the tower, the park’s design was based on the flower of the Hymenocallis, a desert plant.

Architecture and design

An outdoor zero-entry swimming pool is located on the 76th floor of the tower. The design is derived from the Islamic architecture of the region, such as in the Great Mosque of Samarra. The Y-shaped tripartite floor geometry is designed to optimise residential and hotel space. A buttressed central core and wings are used to support the height of the building. The structure also features a cladding system which is designed to withstand Dubai’s hot summer temperatures. It has also been the tallest building in the world since its topping out in 2009, surpassing Taipei 101, which had held the record for a half-decade.
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Air conditioning

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• The tower was known as Burj Dubai (“Dubai Tower”) until its official opening in January 2010.

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• Putzmeister created a new, super high-pressure trailer concrete pump, the BSA SHP-D, for this project.

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• This 244-metre (801 ft) spire is widely considered vanity height, since very little of its space is usable.

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• On 26 October 2008, Emaar announced that based on results of a naming contest the fountain would be called the Dubai Fountain.
• The foundation was designed to support the total building weight of approximately 450,000 tonnes (500,000 short tons; 440,000 long tons).

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• The top of the building is cleaned by a crew that uses ropes to descend from the top to gain access.

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The foundation was designed to support the total building weight of approximately 450,000 tonnes (500,000 short tons; 440,000 long tons). This weight was then divided by the compressive strength of concrete which is 30 MPa which yielded 450 sq. A cathodic protection system is under the concrete to neutralise the sulphate and chloride-rich groundwater and prevent corrosion.
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Soar to new heights

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Most of the workers involved in the riot returned the following day but refused to work. CTLGroup, working for Skidmore, Owings and Merrill, conducted the creep and shrinkage testing critical for the structural analysis of the building. Samsung C&T built the tower in a joint venture with BESIX from Belgium and Arabtec from the UAE. The top of the building is cleaned by a crew that uses ropes to descend from the top to gain access. Under normal conditions, when all building maintenance units are operational, it takes 36 workers three to four months to clean the entire exterior.