On November 24, 2025, the first steel cage for the underground continuous wall of Tianjin Airport Station on the Beijing Binzhou Intercity Railway, constructed by China Railway Construction Group, was successfully lifted, marking the official start of construction for the station and laying an important foundation for high-quality underground structure construction in the future.

Building an air rail intermodal hub to enhance passenger travel efficiency

Tianjin Airport Station is a newly built underground station on the second phase of the Beijing Tianjin Intercity Railway, located on the east side of Terminal 2 of Tianjin Airport. The total length of the station building is 851 meters, with a scale of 2 sets and 6 lines, and adopts an underground three story structure. As the first high-speed railway station in Tianjin to achieve seamless connection between railway and aviation, it will significantly optimize the transfer process after completion. Passengers can experience zero distance transfer through air rail intermodal transportation, greatly improving travel efficiency.

Overcoming complex geological and clearance limitations, innovating processes to ensure construction accuracy

The support of the station foundation pit is centered around the underground continuous wall, and the construction faces two major challenges: firstly, due to the limitation of the airport clearance height, the steel cage must be lifted in sections, which requires extremely high accuracy for aerial docking; Secondly, the project is located in a marine soft soil layer, which has the characteristics of high groundwater level and high pore water pressure. The construction of ultra deep trench walls is prone to problems such as trench collapse and diameter reduction. The project team innovatively optimized the layout of lifting points, setting up 2 rows of 8 dedicated lifting points for each steel cage to ensure even lifting force, and establishing a linkage mechanism between processing and groove forming progress to achieve an efficient rhythm of lifting and pouring after the groove is completed. During the lifting process, a 350 ton main crawler crane and a 200 ton auxiliary crawler crane were used for coordinated operation, with both cranes operating synchronously and smoothly. Ultimately, the verticality error of the steel cage was strictly controlled within 1/300.Keywords: infrastructure, engineering construction

Serve national strategy and improve regional railway network

The Beijing Tianjin Hebei intercity railway is an important channel connecting Beijing and the Binhai New Area of Tianjin. It is a key project in the planning of China's Beijing Tianjin Hebei intercity railway network and a key project to promote the coordinated development of Beijing Tianjin Hebei and implement the national strategy of transportation integration. Previously, the Beichen Station and Baodi South Station, constructed by China Railway Construction, were put into use on December 30, 2022, and the Beijing Urban Sub center Station has also entered the final stage of the project. The comprehensive construction of Tianjin Airport Station will further weave the Beijing Tianjin Hebei rapid passenger transport network and enhance regional connectivity.editor/Yang Meiling