Modern Express News (Reporter Li Nan/Text Zhao Jie/Photo) At present, the highly-watched Qatar World Cup group stage is in progress. From stadium construction, to public transportation, to network communication equipment and daily necessities, a "Chinese Legion" built by China and intelligent manufacturing is shining inside and outside the stadium of the Qatar World Cup. Among them, the power of "Dongda Construction" is also shining in Qatar.
participated in the construction of "Diamond in the Desert". Their plan shortened the construction period of nearly one and a half months
As one of the eight main venues of this World Cup, Qatar Education City Stadium is known as "Diamond in the Desert". It attracts world attention with its unique appearance and is designed to accommodate 40,000 spectators. It is the first five-star stadium certified by the global sustainable development evaluation system GSAS. It has hosted the 2020 AFC championship.
The roof structure of the Qatar Education City Stadium adopts a circular cable-bearing grid structure, and is designed by the famous British design company Buro Happold. Shanghai Construction Engineering (Jiangsu) Steel Structure Co., Ltd. and Shanghai Gongying Steel Structure Co., Ltd. are responsible for the roof steel structure construction, Nanjing Dongda Hyundai Prestress Engineering Co., Ltd. is responsible for the cable network construction, and Southeast University Professor Guo Zhengxing and Professor Luo Bin are responsible for the key technical solutions.
△Teacher Luo introduced the construction situation
"The biggest technical feature of the project is the scaffolding network structure. In terms of the prestressed balance characteristics, it is essentially different from the domestic scaffolding grid structure. China is balanced by the entire roof, but in Qatar's engineering, all prestresses are independently balanced by the external pressure ring." Luo Bin introduced that the so-called scaffolding grid structure, simply put, is a large net woven from steel cables. For cable-bearing grid structures, the traditional construction steps are to first install the perimeter columns and build a temporary support frame on the stands; then assemble the upper grid of the roof structure on the columns and support frames, and finally carry out the construction of the lower cable-bearing grid.
"The cable bearing grid structure is usually first to construct the upper roof, and a support frame is required to hoist the roof structure on this support frame, and then install the cable net that is tensioned lower. This time, we in turn, we first construct the cable net. Through traction lifting, we form a cable net and the radial cable and the circular cable, and lift the traction to a high altitude, and then directly hoist the roof structure on the supporting cable net, which greatly simplifies the difficulty of construction." Luo Bin pointed out.
Stentless construction not only saves costs, but also effectively protects prefabricated stands, but there are many difficulties to overcome. Through the comprehensive application of a series of research results and the refined construction of various implementation units, the team achieved the integration of prestress design and construction and the high consistency of structural molding, ensuring structural safety during the process, saving cable materials and construction measures costs, reducing on-site operation difficulty, shortening construction period, and successfully completing the green assembly construction of the cable-bearing grid structure with high efficiency and high precision.
"Generally, domestic construction will take nearly three and a half months. Our overseas project has successfully completed the construction of the Suo.com in two months." Luo Bin said.
△Teacher Luo introduced the construction situation
provides remote technical support for the main venue of the World Cup "Big Golden Bowl",
In addition to polishing "diamonds in the desert", the Dongda team also provides remote technical support for the construction of the "Big Golden Bowl" Lussel Stadium .
Lucerne Stadium is located in Lucerne City, Qatar. It is the main venue of the 2022 World Cup and can accommodate 90,000 spectators. As the largest stadium in Qatar, Lussel Stadium has attracted global attention, and many netizens call it the "jewel in the crown" of the Qatar World Cup. Looking at the entire Lussel Stadium from afar, it is like a "golden bowl" in the desert.
△Dongda provides technical support for Lussel Stadium
Lussel Stadium consists of Qatar HBK and China Railway Construction (CRCC), and serves as the general contractor of the project. The design was completed by an international team composed of Beijing Architectural Design Institute BIAD, together with design institutions such as Australia Aurecon and the UK AFL.
On February 13, 2021, at an altitude of about 66 meters above the ground, the main cable net with a total weight of about 2,300 tons of the main stadium of the Qatar World Cup, Lucerne Stadium, was tensioned and formed, and successfully connected with the steel structure, marking the first time that a Chinese enterprise has participated in the successful completion of the main roof structure of the World Cup main stadium built by the design construction general contractor .
It is reported that this project is currently the largest and most professional venue built overseas by Chinese companies. It is also the single-body cable roof of the same type of cable system in the world with the largest span and the largest distance of cantilever . The large-span saddle-shaped roof of the stadium with a span of 274 meters adopts an efficient cable membrane structure system composed of main cable trusses, secondary cable systems and membrane structures.
Between mid-October 2020 and April 2021, Professor Guo Zhengxing, director of the Civil Engineering Construction Research Institute of Southeast University, was invited by the Lussel Stadium Project Department of China Railway Construction Engineering. As a well-known domestic expert in cable structure engineering, he provided strong remote technical support for the construction of cable membrane structure, and helped the China Railway Construction Construction Engineering Department solve and deal with some key technical problems in the installation and construction of this new roof cable membrane structure. Contributing Southeast University's wisdom to the high-quality construction of the large-scale complex cable membrane roof structure of the main stadium of the World Cup, which is "designed in China and manufactured in China".
(edited by Zhou Dongmei)
