The scientific research team of our college helps the Beijing Winter Olympics to build the "The Fastest Ice"

Invited by Beijing Urban Construction Group, which is the construction staff of the National Speed Skating Hall, the high-resolution lidar team led by Professor Mao Qingzhou from the School of Remote Sensing and Information Engineering and Institute of Astronautical Science and Technology of Wuhan University engaged to install the ice-making pipes in the National Speed Skating Hall in the autumn of 2020, during which comprehensive measurements were made using a high-precision 3D laser.

After 28 days of intense data collection and analysis, a total of 2TB of on-site point cloud data was obtained and the measurement accuracy was better than 2mm, which effectively guided the installation and arrangement work of the ice-making pipes. After the final verification, the elevation and parallelism accuracy of the ice-making pipes of the National Speed Skating Hall meet the construction requirements, which provides a strong guarantee for the construction of the "The Fastest Ice".

"The Fastest Ice" of National Speed Skating Hall

The National Speed Skating Stadium, also known as the "Ice Ribbon", is the only new ice competition venue for the 24th Beijing Winter Olympics, and is responsible for the speed skating competition of this Winter Olympics. During the construction of the National Speed Skating Hall, the builders adopted new technologies and high standards to create "The Fastest Ice" in the world, which referring to the best wishes that speed skaters could create new world record when skating on the ice during the Beijing Winter Olympics.

"Beijing Daily" reported on February 7 that in the women's speed skating 1500-meter final, Dutch veteran and five-time Winter Olympic gold medalist Irina Wooster slid 1:53.28.She broke the Olympic record (1:53.51) set by her Dutch predecessor Termos at the 2014 Sochi Winter Olympics.In addition, in this Winter Olympics, Schouten from the Netherlands broke the 20-year-old Winter Olympics record in the women's 3,000-meter race, while Rust from the Netherlands and Van der Poel from Sweden broke the men's 5,000-meter Winter Olympic record twice. This is also a new Olympic speed skating record for the "Ice Ribbon" for 3 consecutive days, worthy of the name "The Fastest Ice".

Ice making pipes under the ice rink

To create the "fastest ice", it is necessary to precisely control parameters such as ice surface temperature and thickness to ensure that the temperature error of the 400m ice channel does not exceed 0.5°C.The ice rink area of the National Speed Skating Stadium reaches 12,000 square meters. The installation accuracy of the dense ice-making pipes arranged in the concrete below the ice surface will directly affect the temperature consistency of the ice surface.The allowable deviation of the whole field elevation is ±5mm, and the parallelism between pipes is better than 1/1000.

The overall point cloud map of the ice-making pipes in the National Speed Skating Stadium

Relying on this technical achievement, the project "Key Technologies and Applications of Dynamic High-precision Construction Surveying for National Speed Skating Stadium" jointly declared by Wuhan University, Beijing Urban Construction Group, Shenzhen University and other units won the first prize of China’s 2021 Surveying and Mapping Science and Technology Award.