China News Service, Beijing, July 29 (Reporter Yu Lixiao) The reporter learned from the Beijing Major Office that the main project of the second phase of the National Convention Center, the international broadcast center and main press center of the 2022 Winter Olympics, was closed on July 29. It is planned to be delivered to the Beijing Winter Olympics Organizing Committee in July 2021.
The second phase of the National Convention Center project is located in the Beijing Olympic Central District, with a construction area of 93,000 square meters and a total construction area of about 410,000 square meters. It is currently the largest single building under construction in Beijing. The main project is mainly steel structure, with a total steel consumption of 126,000 tons.
According to the relevant person in charge of the owner unit Beichen Industrial Group Co., Ltd., the second phase of the National Convention Center is an important facility to strengthen the functions of the Capital International Exchange Center. The 2022 Winter Olympics will temporarily serve as the International Broadcasting Center (IBC) and Main Press Center (MPC) of the Winter Olympics.
Workers of the main part of the second phase of the National Convention Center are currently on site. Photo by Zhao Yu
The reporter learned from the scene that the top floor of the steel structure is a steel roof with a total projected area of 26,000 square meters, about the size of 4 football fields, all composed of a steel reticulated shell structure and a truss structure. The entire steel reticulated shell structure is composed of 85 steel arch beams, each of which has a span of 72 meters from east to west and a width of 3 meters. The project team adopts the method of "high-altitude sliding technique construction in place", through the construction engineering information system BIM technology, to realize the operation steps of "small assembly on the ground and assembly in the operation frame" of the steel reticulated shell.
At the construction site, the project team used a digital hydraulic jacking system to install each steel reticulated shell at a speed of about 4 meters per hour, in accordance with the principle of moving from far to near and in both directions, in 52 meters in order, just like aerial Like building blocks, "spell out" a huge steel roof.
According to the relevant person in charge of Beijing Construction Engineering Group, the steel structure roof sliding construction can effectively reduce the amount of aerial work and increase the speed of project construction. Aiming at the construction of steel structures with large volumes, complex structures, tight schedules, and high standards, the project team also used cutting-edge technologies such as 3D laser scanning and BIM modeling to continuously optimize the plan and save nearly 5,000 tons of materials. Shorten the construction period. Assembling, welding and other construction procedures are higher than the national standards, and strive to build the second phase of the National Convention Center into a masterpiece of capital city construction.
The relevant person in charge of Beichen Industrial Group Co., Ltd. said that the second phase of the National Convention Center after completion will be integrated with the first phase of the National Convention Center to form a convention and exhibition complex with a total scale of 1.3 million square meters. The first floor of the second phase of the National Convention Center is the main venue covering an area of 8,000 square meters and an exhibition hall of 20,000 square meters; the second floor is composed of multiple small and medium-sized multifunctional meeting rooms, which will become an important "meeting room" in the city in the future . (Finish)