On February 4, 2022, the opening ceremony of the 24th Winter Olympic Games was held in the National Stadium "Bird's Nest". The upsurge of sports is surging, and the forging ahead China and the Olympics once again join hands to play the movement of "peace, friendship and progress".

The Beijing-Zhangjiakou high-speed railway is an important basic project for the coordinated development of Beijing-Tianjin-Hebei region. It is an important transportation support facility for the 2022 Beijing Winter Olympics. It is China's first high-speed railway with intelligent construction of intelligent equipment and intelligent operation. The "Sharp Tool" of Science and Technology participated in the construction of the Beijing-Zhangjiakou Railway, used advanced scientific and technological means, implemented the requirements of the construction period, and served the Beijing Winter Olympics and Winter Paralympics with the highest quality.

In the construction of the Beijing-Zhangjiakou high-speed railway, China Railway Science and Engineering undertook the construction of the six most difficult bridges on the Chongli branch line. Facing the complex working conditions such as 25/1000th downhill and 2km large curved tunnel, the JQDS900 type frame The bridge crane has undergone targeted transformation, and the Chongli branch line of the Beijing-Zhangjiakou high-speed railway has been completed in only 32 days

39 box beams were erected between Xinxingbao Tunnel and Dongjiazhuang Tunnel.

Xinxingbao Tunnel is a 2km large curved tunnel, which brings great challenges to the loading and transport of bridge erection machines. There are 6 bridges between the two tunnels, and two bridges are sandwiched between the front and rear of the 7-section roadbed, which increases the erection of the first and last holes. It is very difficult, especially the erection of 32m-24m-24m beams exceeds the normal erection conditions of the bridge erection machine. In response to the problems and challenges, the on-site engineering managers and technicians of China Railway Science and Technology Co., Ltd. responded urgently, and made designs and plans on site to achieve 2 A bridge was erected in the sky, creating a new record since such equipment was put into production.

Zhangjiakou Chongli Railway is one of the key supporting transportation projects for the 2022 Beijing Winter Olympics. It mainly serves the Winter Olympics Chongli competition area, the development of tourism resources in Chongli District, and the travel of residents in the southern part of Chongli District. An important part of the intercity rail network.Editor/Ma Xue