Time gradually entered the end of 2007. Due to some minor reasons, some venues encountered bottlenecks in the design, so there was a brief shutdown. However, the general headquarters was always busy. On this day, the general commander directed the design of the "Bird's Nest" in the stadium. Renovation begins with various meetings.
The structure of the Bird's Nest was completed on schedule, and after it was unveiled to the industry for excellence awards, it quickly aroused praise. During the entire structure construction process, through the unremitting efforts of the general headquarters, construction units, supervision units, construction units, and design units, we finally found a breakthrough in each problem and integrated the most advanced construction technology in the world. According to project statistics, This project alone used nearly 42,000 tons. These steels are not ordinary steels, but environmentally friendly materials full of technology, especially some load-bearing materials. They use a kind of q460 low-alloy steel. This kind of steel is difficult to cast, but it has super load-bearing performance, so the project Starting from the source factory, we start to overcome difficulties and invent and create.
The entire Bird's Nest is 320 meters long, 297 meters wide, and 69 meters high. It has a construction area of 258,000 square meters and can accommodate multiple audiences. When viewed from the air, it is a beautifully constructed Bird's Nest. Such a building fully reflects the excellent strength of Made in China, and also reflects the architectural wisdom of the Chinese people. Among the 40,000 tons of steel, almost every piece of steel has a different shape. After tens of thousands of steel pieces are cast, they need to be precision welded, and various functions must be designed internally.
The most important thing is the venue and stands. The entire Bird's Nest stand is divided into 6 areas (so the segments I mentioned before should be 60-degree sections.) Each area is independent, and the areas are connected through elastic connection points, which have good earthquake resistance. and safety performance.
In addition to safety performance, the design of the stands incorporates advanced design concepts and technological elements. The distance between any position in the stands and the center of the stadium is generally about 142 meters, ensuring the best viewing effect. In order to ensure the viewing effect, the entire bird's nest does not have a single column that blocks the view, and the entire bird's nest relies on a mesh structure made of steel to support the weight. This undoubtedly puts forward extreme requirements for construction, requiring every piece of steel to perform a load-bearing function.
Due to the complexity and precision of construction, many steel materials during construction cannot be transported by large machinery. They are all moved by humans and then welded and connected bit by bit manually. Therefore, in addition to building materials, a large amount of time and labor costs also greatly increase the construction cost. Therefore, when the structure of the Bird's Nest was completed, it won unanimous praise from the architectural community.
However, these are only half of the progress, and there is still more troublesome decoration. There are countless inventions and utility model patents produced by the Bird's Nest structure, and there are so many construction methods that they can be directly summarized and published in a book. The problems faced by decoration are more complicated and difficult to overcome.
Six storage tanks are designed around the Bird's Nest, which can collect and store cubic meters of rainwater at the same time, saving 58,000 tons throughout the year. This water is used for daily useOften used for lawn irrigation, air conditioning cooling water, toilet flushing, fire fighting, etc.
In order to allow the audience to experience a good viewing effect, a transparent film with diffuse reflection ability is affixed to the Bird's Nest steel structure, which can absorb strong light from all directions, even if the audience is facing directly. Even when exposed to the sun, you won't feel dazzling. This material can also effectively absorb sunlight to avoid long-term sunlight exposure and damage to the lawn and other facilities in the venue. In this double-layer membrane structure, the upper layer of the roof truss uses an EtFE membrane with a transparency of 98%, and the lower layer of the truss uses a ptFE membrane with a transparency of 40% and has the function of an acoustic ceiling. The double-layer membrane can enable the audience in the stadium to have It has good illumination, saves energy, and has good resistance to solar radiation. The membrane structure area used is also an innovation. It is the largest and most complex membrane structure used in many international and domestic projects. .
There is more than one headache. In order to make the bird's nest reusable, the huge center field lawn is designed to be movable. It facilitates the conversion of various venues. In addition, the Bird's Nest also designed a ground source heat pump system, which provides a useful supplement to the Bird's Nest air conditioning system. The Bird's Nest's solar energy storage function can provide heat source for athletes' bathing water. The Bird's Nest embodies the concepts of Green Olympics, Science and Technology Olympics and Humanistic Olympics from the inside out. The design is perfect, but you must know that Beijing is an area with four distinct seasons. It is too difficult to achieve the design concept! The construction of this venue was very early, but it was difficult to make progress during the construction process.
Experts have a headache when looking at these functions, because the design also wants to build a movable large roof. These methods are too difficult. Now it is not only a matter of money, almost every technology here comes from The experts were at a loss as to what they had come up with on the spur of the moment.
When the experts were at a loss, Xiao Wang, a young designer in the team, had a sudden idea. He proposed a bold plan: Can we try to modularize the design of the greenhouse roof? Each module has independent functions and mobility capabilities, coordinated through an intelligent control system?
This idea immediately attracted everyone's attention. Although it sounds challenging, if it can be successfully implemented, it will not only solve current technical problems, but also potentially create a new architectural design concept.
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As a result, experts began to discuss Xiao Wang’s plan and tried to translate it into a specific implementation plan. They began researching various advanced materials and technologies to ensure that each module had sufficient strength and stability. At the same time, they also need to design an intelligent control system that can accurately control the movement and coordination of each module.
In this process, team members need to face huge challenges and difficulties. They need to constantly experiment and adjust to ensure that each module fits together perfectly to form a complete and stable mobile shed roof.
However, the completion time is coming soon. No matter how good these ideas are, they are not suitable for development here. Moreover, some dangers have occurred in other countries before. In the end, everyone had to focus their solutions on key issues. Make timely decisions to ensure the smooth progress of the project.
Despite this, I still can’t let go of my beautiful vision of the “Bird’s Nest” in the stadium. Everyone hopes to leave their own mark on this land so that future generations can remember our efforts and contributions. But the reality is often cruel and time is running out. We have to temporarily put aside those beautiful imaginations and focus on the most critical issues at hand.
We all know that every decision may affect the success or failure of the entire project. Therefore, when faced with a choice, you have to think carefully and weigh the pros and cons. For the sake of the overall situation, it is even necessary to sacrifice some personal interests. But these sacrifices are worth it, because everyone knows that only in this way can we ensure the smooth progress of the project and the smooth completion before the Olympic Games.
After several revisions and discussions, the design plan was finally finalized with the joint efforts of everyone. Immediately afterwards, the drawings began to be distributed to various construction units in December 2007. Every detail was accurately marked, providing clear guidance for the subsequent construction.
This year, Li Yu's work was extremely busy. Her 18th birthday should have been an important moment full of laughter and blessings, but due to her busy work schedule, she could only celebrate briefly with Gu Han. Although her friends knew that she was busy and sent gifts one after another, she was unable to arrange any large gatherings due to time constraints. Despite this, Li Yu's heart is still full of gratitude and joy, because she knows that these gifts carry the care and blessings of her friends. In the past, she often took advantage of the time difference in space to study in Duoduo. In the last period of time, she just used the time in space to rest, otherwise she would feel a little unable to endure it.
During the construction process, the entire team worked non-stop without any delay. They always pay attention to the construction progress and ensure that every link meets the design requirements. After several months of hard work, the project was finally completed in March 2008. Looking at the results in front of them, the entire team felt extremely proud and gratified. Several years of hard work and dedication finally came to fruition on this day.
All venues were completed under intensive construction and were finally delivered for use on May 1, 2008. When the cleanup phase entered, everyone breathed a sigh of relief. This huge Olympic project that had been exhausting their efforts was finally completed! They looked at each other and smiled, their eyes filled with a sense of accomplishment and joy.
This Olympic project is a symbol of an era, witnessing the hard work and wisdom of countless people. From the finalization of the design plan to the distribution of drawings to the completion of construction, every link embodies the wisdom and sweat of the team. It was their unremitting efforts that made this project go smoothly.It was successfully completed and added a beautiful scenery to the city.
Today, these venues will become the city’s new business cards. Whenever people come here, they will feel the weight of history and the vitality of modernity. And behind this is the result of the silent dedication and hard work of countless workers like Li Yu. They interpret responsibility and responsibility with practical actions, and also let us see the strength and hope of China's construction.
Finally, it’s done! Li Yu, Jiang Wei, Zhao Heng, Cheng Yu, and Tan Fei all plan to take a good rest, and through this practice, they have obtained a lot of scientific research results. The school plans to jointly award them with doctoral degrees with other doctors in the graduation season. Certificate and bachelor's certificate, this time, a lot of time earlier, which is very happy!