In the early morning of September 24, 2021, the first phase of the intercity rail link between the newly built Capital International Airport and Beijing Daxing International Airport, constructed by the No. 5 Company of China Railway Construction Bridge Bureau, crossed Mizhuo Expressway and the three parallel continuous beams were all closed. This is also the largest span continuous beam on the entire line, with a main span of 128 meters. After the entire line is completed, the Capital International Airport and Beijing Daxing International Airport can be reached within 45 minutes.

The first phase of the intercity railway link line between the newly built Capital International Airport and Beijing Daxing International Airport starts from Langfang East Station at the border of Tokyo-Hebei Province, passes through Guangyang District of Langfang City, Daxing District of Beijing, and ends at Beijing Daxing International Airport to Nanjing-Hebei Province. The provincial boundary has a total length of 39.339 kilometers and a total of 4 stations, namely Langfang East Station, Konggang New District Station, Xinhangcheng Station, Daxing International Airport Station, and 1 train station in Langfang.

Three-line triplex crossing the Seventh Ring Road in Beijing

The first phase of the intercity railway link line between the newly built Capital International Airport and Beijing Daxing International Airport starts from Langfang East Station at the border of Tokyo-Hebei Province, passes through Guangyang District of Langfang City, Daxing District of Beijing, and ends at Beijing Daxing International Airport to Nanjing-Hebei Province. The provincial boundary has a total length of 39.339 kilometers and a total of 4 stations, namely Langfang East Station, Konggang New District Station, Xinhangcheng Station, Daxing International Airport Station, and 1 train station in Langfang.

The three parallel continuous beams across Mizhuo Expressway are the key control projects of the whole line. They are composed of three parallel continuous beams of the Xinhangcheng Extra Large Bridge, the left-line bridge of the EMU and the right-line bridge of the EMU. Among them, the Xinhangcheng Super Bridge is the main line of traffic bridges. The left and right bridges of the super large bridge for moving trains lead to the motor vehicle inspection and repair station, which provides parking and maintenance services for daily high-speed rail trains.

The "three lines and three joints" continuous beams straddle Mizhuo Expressway as the main traffic artery in the southeast of Beijing. There is a dense traffic flow and continuous traffic during the construction period. The construction is complicated, quality standards and safety risks are high.

Long-span continuous beam construction is safe and sound

In view of the difficulty of construction organization and high safety risk, the builders poured in 17 standard sections during the construction of large-span continuous beams. Through fully enclosed protection, protective fences were installed on both sides of the bridge deck to prevent objects from falling to high speed. highway.

At the same time, in order to ensure the high-quality, safe and smooth closure of continuous beams, the project carried out technical research by optimizing technical strength, creating a BIM model for the hanging basket construction, using three-dimensional animation to simulate the process flow, optimizing the implementation plan, and improving the efficiency of on-site disclosure. Construction is in progress. The whole process of linear monitoring ensures the smooth and precise closure of the bridge.

In addition, the builders also use the "smart construction site" platform to build a data monitoring section through big data, Internet of Things, cloud computing and other information technology methods, and use the "end + cloud + big data" method to collect and intelligently analyze construction site data , To achieve precise monitoring and intelligent management of project quality.

Beijing-Tianjin-Hebei on orbit speeds up again

The newly built intercity railway link project between the Capital International Airport and Beijing Daxing International Airport is an important project in the planning and construction of the Beijing-Tianjin-Hebei intercity railway network. The Xiongshang High-speed Railway connects to the Huairou South Station of the Beijing-Harbin High-speed Railway via Beijing Daxing International Airport Station, Langfang East Station, Universal Studios Station, Beijing Sub-center Station, and Capital International Airport Station to the north.

Keywords: engineering construction, engineering construction information

The project is constructed in two phases. The first phase of the project started in 2019, starting from Langfang East Station to the border of Tokyo and Hebei Province, and finally to Beijing Daxing International Airport to the border of Nanjing and Hebei Province. The project is progressing steadily, and the main project is expected to be completed within this year. After the completion of the whole line, the interconnection between the two airports in Beijing will be realized, and the time of access between the two airports will be shortened to 45 minutes, which is of great significance for improving the function of the railway hub in the core area of Beijing-Tianjin-Hebei, achieving the integration of multiple tracks and multimodal railway and aviation transportation. . Editor/Sang Xiaomei