Skiing, take-off, take-off, landing and taxiing. The competitive snow events of the Winter Olympic Games are highly ornamental. The excellence of such Winter Olympic events held in artificial profile track venues and athletes' achievements are closely related to the construction accuracy of the track. How to ensure the fine construction of national ski jumping center "xueruyi" and Shougang ski jumping platform "xuefeitian" and other track venues? The architectural design and Research Institute of Tsinghua University took the lead in undertaking the project of "Research on fine construction technology of competitive artificial profile track", a key special project of the national key R & D plan "science and technology Winter Olympics", and formed a scientific research team with other participating units to carry out scientific research in the whole cycle of track design, construction, operation and maintenance, so as to promote the accuracy of track construction to centimeter level. Digital technology helps China's platform jumping track meet the Olympic standards "Previously, China did not master the design and construction technology of platform jumping track that meets the Olympic standards. This time, it passed UAV aerial survey, BIM (building information model) and VR (virtual reality) And other digital technologies to digitally model the complex mountain environment and track surface where the venue is located, and conduct real-time simulation analysis and guidance in the process of track location, design and construction, so as to effectively help China complete the design and construction of platform jumping track that meets the Olympic competition standards for the first time. " Zhang Mingqi, head of the project and professor level senior engineer of the architectural design and Research Institute of Tsinghua University, said in an interview with the science and technology daily. During the construction of the track, the scientific research team conducted technical disclosure for key and difficult parts such as complex nodes through three-dimensional display of digital models to ensure pre control before construction and inspection after construction; For the complex processes in the project, the digital simulation technology is used to demonstrate the construction processes and methods in advance in the computer to ensure the feasibility and correctness of the construction technology; For the operation and maintenance management in the construction process, the visualization and accuracy of the process are realized through the cloud platform system, so as to greatly improve the construction accuracy and efficiency. Shougang ski jumping platform and the national ski jumping center track successfully passed the certification of the International Snow Federation at the end of 2019 and 2020 respectively, and successfully accepted the inspection of the "meet Beijing" series of test activities and test competitions at the beginning and end of 2021. Mr. rasser altsen, director of the Nordic biathlon competition of the International Ski Federation, praised the national ski jumping center as the most "impressive and admirable" platform jumping venue. In the early days of the outbreak of COVID-19, China's diving athletes could not go abroad for training. Because of the successful demonstration of the Winter Olympic venues and tracks, the scientific research team was ordered to provide digital technology application for the Laiyuan national ski jumping training and scientific research base under design and construction. In only 307 days, the scientific research team has provided track facilities that meet the Olympic standards for the preparation and training of Chinese athletes, ending the history that the national team had to go abroad for training in the past. Intelligent detection equipment provides scientific basis for track accuracy control In addition to using digital technology to guide the construction, the scientific research team has developed a variety of detection and monitoring technologies for the track, providing a scientific basis for the accuracy control of the track. "The artificial profile track is often completed by adding snow after supporting the datum with artificial structural support. Therefore, the flatness of the datum surface is of great significance for the construction accuracy of the track and the high level of athletes." Zhang Mingqi introduced that the team of Hebei University of engineering, the project participant, has developed an intelligent detection vehicle with the function of intelligent analysis and evaluation of pavement surface flatness, which can complete the detection of Shougang ski jump track in 10 minutes, and the detection accuracy reaches millimeter level. In the national ski jumping center and Laiyuan national ski jumping training and research base, the intelligent detection vehicle has also successfully completed the index detection related to the track. During the competition, the surface material of the jumping platform auxiliary slide is ice. According to the characteristics of ice materials, the team of Shenyang Architecture University, the subject participating unit, analyzed the best proportion of ice and snow mixture, developed ice with relatively small friction and ice surface temperature displacement intelligent monitoring system at a specific temperature, and monitored the overall use of the auxiliary slide in real time. The temperature monitoring accuracy is 0.1 ℃, The displacement monitoring accuracy is mm. "The monitoring data can provide a basis for athletes to formulate competitive strategies to improve their performance, and can also provide data support for the maintenance of the ice surface of the auxiliary slide." Zhang Mingqi told reporters that this technology was used in Laiyuan national ski jumping training and scientific research base, which effectively guaranteed the preparation training of national team athletes. (Xinhua News Agency)