鸟巢英语范文

Beijing National Stadium is located in the south central area of the Olympic Park, 2008 29th Olympic Games Main Stadium. The total area of 21 hectares, construction area of 258,000 ㎡. Venue seating about 91,000 spectators, of which about 11,000 temporary seats. Will be held in the Olympic Games, Paralympic Games opening and closing ceremonies, track and field competitions and football finals match. Beijing Olympic Games will become a broad public participation in sports and entertainment to enjoy large-scale professional sports venues, and to be a landmark building and the Olympic sports legacy. National Stadium for the super sports construction projects, the main structure of the design life span of 100 years, fire resistance rating for a level seismic intensity of 8 degrees, the underground water level of a project. The main construction works were oval-shaped space saddle, 333 meters long from north to south, east-west width of 294 meters, 69 meters high. The main steel structure of the giant space to form an overall saddle-shaped braided steel truss-style "bird's nest" structure, steel structure of the total steel 42,000 tons of concrete grandstand is divided into upper, middle and lower three-story, concrete structure stands underground 1 layer , 7 on the ground floor of reinforced concrete frame - shear wall structural system. The upper part of steel and concrete grandstand completely torn off and the separate, formal mutual Wai were combined, the foundation is sitting on a floor on the basis of connected. The National Stadium on the roof steel structure covered by a double membrane, that is, between the fixed winding of the steel structure of the upper transparent ETFE membrane and fixed in the steel and the inner ring下弦under the lower wall of translucent PTFE acoustic ceiling.