Beijing 4K POV - National Centre for the Performing Arts - Beijing - China 中国北京国家大剧院夜景

Описание: #beijing #NCPA #NationalCentreforthePerformingArts
The National Centre for the Performing Arts (NCPA), and colloquially described as The Giant Egg, is an arts centre containing an opera house in Beijing, People's Republic of China. Designed by French architect Paul Andreu, the NCPA is the largest theatre complex in Asia. The NCPA is semi-spherical in appearance, with a long axis length of 212.20 meters in the east-west direction, a short axis length of 143.64 meters in the north-south direction, a height of 46.285 meters, an area of 119,900 square meters, and a total construction area of approximately 165,000 square meters. Meters, including 105,000 square meters of main buildings and 60,000 square meters of underground, auxiliary facilities, with a total cost of 3.067 billion yuan. There are Opera hall, Music hall, theater and art exhibition halls, restaurants, audio shops, and other supporting facilities.

The exterior of the NCPA is a steel structural shell. It has a semi-ellipsoidal shape. The length of the long axis in the east-west direction of the plane projection is 212.20 m (696.2 ft), the length of the short axis in the north-south direction is 143.64 m (471.3 ft), and the height of the building is 46.285 m (151.85 ft), which is slightly lower than the Great Hall of the People by 3.32 meters. The deepest part of the foundation reaches 32.5 m (107 ft). It is as tall as ten floors. The large theatre shell is made up of more than 18,000 pieces of titanium metal plates, covering an area of more than 30,000 m2 (320,000 sq ft). Of the more than 18,000 pieces of titanium metal plates, only four parts are the same shape. The titanium metal plate is specially oxidized, and its surface metallic lustre is very textured and has a consistent colour for 15 years. The middle part is an involute glass curtain wall, which is made up of more than 1,200 pieces of ultra-white glass. The ellipsoidal shell surrounds the artificial lake, with a surface area of 35,500 square meters, all channels and entrances located below the water surface. Pedestrians need to enter the performance hall from an 80-meter underwater passage.

NCPA located on the south side of Chang'an Street, in the heart of Beijing.
According to the requirements of Beijing's overall planning, the height of the NCPA cannot exceed the height of the Great Hall of the People(46 meters), but the functional requirements of the NCPA can not be load in the 46-meter space, so it can only develop underground. The underground depth of the NCPA is as tall as ten stories high, and 60% of the building area is underground. It is the most in-depth underground project of public buildings in Beijing. The deepest place is 32.5 meters, which is directly below the stage of the Opera hall. The 17 meters underground of the NCPA is the ancient river channel of the Yongding River in Beijing. The underground of the NCPA contains abundant groundwater. The buoyancy generated by this groundwater can support a giant aircraft carrier weighing 1 million tons. Such tremendous buoyancy is enough to hold up the entire theater. The traditional solution is to pump groundwater out continuously, but the result of pumping groundwater is that a 5-km-wide "groundwater funnel" will be formed underground near the theatre area, causing settlement of surrounding grounds, and even ground buildings may appear crack. To solve this problem, engineers and technicians have conducted a detailed investigation and used concrete to pour an underground wall from the highest water level of the groundwater to the 60-meter underground clay layer. This vast "bucket" formed by subterranean concrete walls can enclose the foundation of the NCPA. The water pump draws the water out of the "bucket" so that no matter how the water pumped in the foundation, the groundwater outside the "bucket" will not be affected, and the surrounding buildings will be safe.

The 6,750-ton steel beam frame made the largest dome. The structure of the NCPA is composed of a single curved steel beam. More than 18,000 pieces of titanium metal plate and more than 1,200 pieces of ultra-white transparent glass form a massive shell of 36,000 square meters. The world's largest dome is not supported by a pillar. The outer layer of the dome coated with nano materials, and when the rain falls on the glass surface, it will not leave water stains. At the same time, nanotechnology also dramatically reduces the adhesion of dust.

To test the noise generated by raindrops falling on the domes with ten football fields, the scientists conducted repeated experiments. Experiments have shown that if effective noise prevention is not carried out, the sound in the entire dome will be like a drum when the rain falls. The anti-noise problem between theater to theater and theater to outside is solved by the use of a technique called "sound gate".