(Winter Olympics asks "Hebei") Why is "Snow Ruyi" the venue with the largest amount of engineering and the most technical difficulty in Zhangjiakou?
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When the number on the big screen at the countdown to the opening jumped to "100", the Beijing 2022 Winter Olympics, bearing the rich history of the land of China, approached us.
From October 26, China News Agency, together with Hebei Daily, Hebei Radio and Television, Great Wall New Media Group, and Zhangjiakou News Media Group, opened the "Winter Olympics Questions "Hebei"" column, which will be covered by text, pictures, cartoons, audio and video and other media. It focuses on the highlights of Hebei Province’s efforts to prepare for the Winter Olympics, shows the achievements of all parties in preparing for the Beijing Winter Olympics and Paralympics, and excavates the rich history of the Winter Olympics for more than a hundred years.
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Why is "Xue Ruyi" the venue with the largest amount of engineering and the most technical difficulty in Zhangjiakou?
China News Service, Zhangjiakou, October 26 (Li Xiaowei) Since the start of construction on May 1, 2018, the Guyangshu venues in the Zhangjiakou competition area of the Beijing 2022 Winter Olympics National Ski Jumping Center, National Biathlon Center, and National Cross-Country Ski Center , And other non-competitive venues were completed in two and a half years.
Among them, the National Ski Jumping Center "Xue Ruyi" is the competition venue with the largest amount of engineering and the most technical difficulty.
Wang Jingxian, deputy director of the Second Venue Construction Department of the Planning and Construction Department of the Beijing Winter Olympics Organizing Committee, the facilities manager of the Guyangshu venues, and the facilities manager of the National Ski Jumping Center, introduced that "Snow Ruyi" is the competition with the largest amount of engineering and the most technical difficulty. The stadium, because of its difficulty in construction, the builders overcame difficulties and set a number of firsts.
Close shot of "Snow Ruyi".
Photo by Zhai Yujia
In Wang Jingxian's opinion, the most difficult construction of "Xue Ruyi" is its "handle head" peak club: the front cantilever height is 37.5 meters, the outer diameter is 78 meters, and the inner diameter is 40 meters. The total use of steel exceeds 1,600 tons. The working surface is very narrow during the process.
In order to fully present this top design to the world, the builders through many discussions and expert demonstrations determined the construction plan with 39 steel trusses as temporary supports. At the same time, the steel needs to be pre-processed, and all the shapes must be completed under the mountain. Hoisting and welding are carried out after being transported.
In June 2020, the allowable deviation of the "Xue Ruyi" steel structure after unloading was 5 cm, but the actual error was less than 2 cm. The builders completed the project safely and with high quality.
"Snow Ruyi" Summit Club.
Photo by Zhai Yujia
It is understood that due to the steep mountain, it is difficult for large construction machinery and equipment to function, and sometimes workers are even required to transport construction materials shoulder to shoulder.
In addition, there are many and large rocks at the base of the mountain, which can't be moved up artificially, and the working surface is narrow. The process of hitting the base of the mountain is extremely difficult.
Due to the climate in Chongli, the short construction period has also become a major problem.
Zhangjiakou Chongli can only be constructed in May, and winter begins in October. Corresponding measures and pre-plans must be adopted for winter construction.
As the slope of "Xue Ruyi" is very large, very good craftsmanship is required to ensure the shaping of concrete.
For this reason, the general contractor of the ski slopes specially invited Finnish engineering experts who have been ski jumping venues to solve the problems of casting molds and concrete flowing in the entire venue with local engineers on the spot.
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