Events: 2007, Beijing Olympic Games, the main venue - National Stadium (Bird's Nest) membrane structural engineering has been to start construction

September 27, 2007, Beijing, the Olympic Stadium - National Stadium (Bird's Nest) membrane structure has already begun construction. It is understood that the Bird's Nest shop is two layers of membrane. 12 m of the outer layer is used to shelter from the rain ETFE ETFE membrane, will be laid for a sound-absorbing PTFE membrane. PTFE membrane is a layer of soundproof curtain, plus some of the processing of acoustic technology can solve the noise problem. The Bird's Nest will be the world's largest environment-friendly stadium, access to natural ventilation while shelter for spectators and athletes.

Events:2006, Bird's Nest steel truss beams successfully uninstalled

January 2006: Mixed suspect soil-structure construction is completed, the main steel column base has been fully installed, start the roof steel structure installation case.

Events:April to May,2006,the IOC members to examine the bird's nest site

January 2006: Concrete structure construction is completed, the main steel column base has been fully installed, start the roof steel structure installation case.

April 2006 to May: the IOC members to examine the bird's nest site

The party website on May 16 morning, the 29th Olympic Games the International Olympic Committee Coordination Committee inspected the Olympic venues under construction in the National Stadium and National Aquatics Center, the members are full of praise for the progress of stadium construction.

Coordination Commission Chairman Hein Verbruggen last visited the National Stadium in October last year, when the ongoing concrete main structure construction. After a lapse of more than six months, the stadium's main steel structures have been finished more than half of the appearance of the "Bird's Nest" has begun to take shape.

"The change really. Obviously, Beijing and BOCOG has done a lot of work." Verbruggen exclaimed. After the end of the tour, Verbruggen "extraordinary" word to describe Beijing's Olympic stadium design and construction work, he said, the athletes will be the biggest beneficiaries of these "extraordinary" venues.

26 to 31 August, 2006: "Bird's Nest steel closure welding, the entire steel structure of the" Bird's Nest "will be seamless.

The official website, August 31 - 12 hours continuous operation after more than 60 welders, noon today, 26, 13, the National Stadium "Bird's Nest steel facade structure closure weld completion of all welding operations, which marked thethe concern of the 29th Olympic Stadium - national Stadium (Bird Nest) completed the structural steelwork closure.

According to reports, the National Stadium steel closure There are two major construction difficulties: First, demanding the closure welding meteorological temperature, steel closure temperature is the temperature of the design basis, the closure temperature control of a direct impact on the running safety of the steel the closure must be in Celsius 19 ± 4oC range for closure welding operations; closure weld mouth, high quality requirements, the national Stadium steel set aside a total of four closure line 128 of the weld, the weld total length of about 600 linear meters, three times to complete closure welding.

September 17, 2006: The National Stadium in the experience of two years of construction, completed on September 17, 2006 steel construction of the last link - Overall uninstall.

Steel structures successfully unloaded, declared to the world the many problems of the steel construction of the "Bird's Nest" Chinese steel expert and construction workers, one by one, the National Stadium project construction has entered a new stage, to win a valuable decoration and Membrane Structures Constructiontime.

Events:2005concrete main structure earlier than expected cap

May 9, 2005,the zero-layer construction of National Stadium

June 15, 2005,the first floor construction of National Stadium

September 14, 2005,the second floor construction of National Stadium

October 21, 2005,the fourth floor construction of National Stadium

October 28, 2005,the first steel member of the National Stadium hoisting ceremony

November 15, 2005,the main structure of concrete advance capped a month earlier than expected

At 10:18 on November 15th, 2005, Beijing Urban Construction Group chairman Liu Longhua the order, the last bucket of concrete built into the "Bird's Nest (National Stadium) in the roof structure. At this point, "nest" of concrete main structure of the cap in advance.

As the Beijing 2008 Olympic Games opening and closing ceremonies, the main venue for track and field venue, the "Bird's Nest" is the degree of social concern, high technology, difficult construction projects in all Olympic projects. The total construction area of 258,000 square meters, the floor height of 69.21 meters, the entire building shape was elliptical shape of a saddle. The completion of the concrete structure of the main sub-basement, ground seven, three-bowl inclined grandstand can accommodate 9.1 million.

Events: 2004, July frugal Olympics Bird's Nest full suspension and return to work in December

February 2004: one hundred of the National Stadium of foundation piles to complete the construction of the Bird's Nest "project began substantive structure.

July 30, 2004: Olympic venues, security, economic issues into focus, July 30 "Bird's Nest" full suspension.

Known as the "Bird's Nest" Beijing 2008 Olympic Games main stadium has downtime, in order to further the "frugal Olympics". This project will be resumed immediately after the Beijing Olympic Organizing Committee Executive Vice President Liu Qi said in Athens on the 12th, the experts re-argument and adjust the planning and design, construction.

August 31, 2004: "Bird's Nest" to cancel the roof can be opened, the program adjustments style is unchanged.

August 2004: "Bird's Nest" published renderings.

November 2004: the design of optimal adjustment of the work to be completed in late.

December 2004: Beijing 2008 Olympic Games main stadium "Bird's Nest" was returned to work.

Events:December 24, 2003: National Stadium groundbreaking ceremony was held

The leadership of the CPC Central Committee Political Bureau Standing Committee of the CPPCC National Committee Chairman Jia Qinglin, member of the Political Bureau of the CPC Central Committee, Beijing Municipal Committee, the Beijing Olympic Organizing Committee President Liu Qi, Beijing acting mayor, BOCOG Executive President Wang Qishan laid the foundation stone for the National Stadium.

The historical picture at 9:15 on December 24, started construction of the National Stadium, marking the full launch of the Beijing Olympic venue construction projects, also a symbol of the Chinese nation for the Olympics in China realize their dreams, "wrote the solemn and glorious records. The CPC Central Committee Political Bureau Standing Committee of the CPPCC National Committee Chairman Jia Qinglin, member of the Political Bureau of the CPC Central Committee, Party Secretary of Beijing, the Beijing Olympic Organizing Committee President Liu Qi, Municipal Committee, Municipal People's Congress the Junbo city CPPCC Chairman Cheng World Bauer attended the groundbreaking ceremony . Deputy secretary, acting mayor, Beijing Olympic Organizing Committee Executive Chairman Wang Qishan presided over the groundbreaking ceremony.

Events:2002-2003 the National Stadium "Bird's Nest" program was came outIn April 2002, the Beijing Municipal Planning Commission established the "Olympic Project Office, specializing in Olympic venues and related facilities construction project legal person bidding organizing, coordinating and developing all kinds of tender documents, and actively promote the Olympic venues at home and abroad project legaltenders;

In October 2002, to the global public offering of the Olympic project pre-qualification and Call for Expression of Interest documents. Meanwhile, the Beijing National Stadium (2008 Olympic Games main stadium) architectural concept and design "to hold an international competition. Qualification competition design units or the Commonwealth, from a dozen countries and regions, including the United States, France, Italy, Germany, Japan, Australia, seven independent participating units and seven associates body participating units participated in the concept of the race of the design;

January 2003 to February, the jury recommended seven National Stadium project legal assessment of the application documents shall be reported to the municipal government for approval, the five National Stadium project qualified applicants to enter the second phase of the project legal tender;

April 2003, after a rigorous review process and the masses to vote jointly designed by Herzog & de Meuron, the Swiss design firm, Arup and the China Architecture Design & Research Institute of the Commonwealth "Bird's Nest" program novel design, unique structure, the final selected. At the same time, the National Stadium project legal partner of tender documents is formally issued;
In June 2003, the project corporate partners bidder to submit the optimized design, building programs, financing options, operational programs and the transfer of programs being evaluated.

In July 2003, the bid evaluation committee recommended the two composite score front of the successful candidate.

In August 2003, after negotiations, and report to the Beijing Municipal Government approved and finalized by the China CITIC Group, Beijing Urban Construction Group Co., Ltd., composed of four companies of the country An Yuejiang Co., Ltd., Golden State Holding Group Co., Ltd. CITIC Group Commonwealth to become a corporate partner of the National Stadium project tender the successful bidder.

August 9, 2003, the Beijing 2008 Olympic Games main stadium - the National Stadium project was formally signed and initialed a concession agreement, the partners of the Commonwealth of the Chinese CITIC Group as the project legal tender to the successful bidder and the Beijing Municipal Government, Beijing Municipal Government "national Stadium agreement, initialed and the Beijing Olympic Organizing Committee and the Beijing State-owned assets Management Co., Ltd. signed a co-operative contract.

September 2003, the Beijing State-owned Assets Management Co., Ltd. and China CITIC Group consortium, the official start of the preparatory work of the National Stadium Co., Ltd..