On August 16, the “Chinese Government-aided Cambodia Stadium Project” undertaken by China State Construction Engineering Co., Ltd. passed the completion inspection and acceptance. The “Ship of Friendship” between China and Cambodia, a new landmark of mutual communication between the two peoples, was completed.
The Cambodian Stadium Project is a fruit of cooperation under the framework of China-Cambodia’s “Belt and Road” initiative. It is the largest and highest-level stadium built by the Chinese government so far. The overall design plan was personally selected by Cambodian Prime Minister Hun Sen. With a construction area of about 80,000 square meters, it is a large stadium with a capacity of 60,000 spectators. It will serve as the main venue for the 2023 Southeast Asian Games.
The overall design of the project is simple and modern, and the shape is novel. It introduces the master plan of the ancient Angkor Wat moat, and integrates traditional elements such as Cambodian “Namira” and the roof of ancient buildings into the 99-meter-high herringbone hanging towers at both ends of the stadium. It is the deep integration of Chinese technology and Cambodian culture, and it looks like a sailing boat, which symbolizes the friendship between China and Cambodia.
The world’s first 99-meter super-high “herringbone” shape bidirectional, inclined space and curved surface fair-faced concrete pylon structure.
There is a 99-meter-high herringbone pylon in the north and south of the project. This is the “mast” of this giant “sailboat”. It has a unique shape, novel structure, and complex and changeable. It adopts a variable cross-section and variable curvature design. The space curve is inclined to rise. There is no reference precedent for this kind of structure construction. How to accurately realize the structure of the pylon structure and how to ensure that the site template and the three-dimensional model are not different from each other have become the main difficulties in the construction of the pylon.
In the face of construction challenges, the project developed the design method and processing technology of the modeling wood, formed the design and construction technology of the three-dimensional distorted formwork system, and completely solved the difficulty of deforming the curved surface in the three-dimensional space of the structure.
The project team independently designed and developed a steel supporting tower that integrates vertical transportation, deformation control, and hydropower pipeline laying. The three-dimensional curved surface of the font is inclined, and the construction technology of the concrete pylon has reached the international advanced level after identification.
The world’s first cable-stayed flexible cable-truss canopy structure
The interplay of “Harp” and “Sky Umbrella” is a vivid description of the stress system of the cable-truss flexible canopy. Two towers with a height of 99 meters are in the shape of a “herringbone”, with 18 stay cables pulled up at one end, and 8 connected at the other end. The back cable is like two aerial “harps” gently lifting the cable truss canopy, playing an architectural hymn in the long-span tension.
The cable-membrane canopy structure of the project is composed of 22,000 meters of cable, 219 tons of cable clamp nodes, and 33,000 meters of PTFE membrane. How to balance the “Sky Umbrella” cable net structure and increase the pulling force generated by the cable during the tensioning process? How to ensure the stability of the cable-truss system during the cable-net tension forming process? This is the core technical problem that builders need to overcome to implement cable net tensioning.
The project introduces the combination of VR, AR, 3D printing technology and BIM, and relies on technical means such as finite element analysis to carry out more than a hundred simulations on the key nodes and elements that affect the tension of the cable net, and make a 1:15 structural simulation model. The precise control of cable tension in the whole process conquered the world’s first cable-stayed flexible cable-truss canopy structure, and once again demonstrated China’s construction and the speed of China to the world.
Source: JUYI Seating Company