, Tianjin, December 12 (Sun Lingling) The reporter learned from the Tianjin Municipal Transportation Commission that on December 8, the first shield machine of the second phase of the Jingbin Intercity Project undertaken by China Railway Fourth Bureau began to excavate. With the slow rotation of the cutterhead of the shield machine, the first super-large diameter shield machine "Keihin Tongxin" of Keihin Intercity was successfully launched and began to excavate in the direction of Tianjin Binhai Airport.

It is understood that the "Keihin Tongxin" is the first shield machine launched on the whole line of Keihin Intercity, and it is also the largest diameter railway shield machine in the Beijing-Tianjin-Hebei region. With a total length of 135 meters, a total weight of about 2800,13 tons and an excavation diameter of 8.1 meters, the shield machine was used for the construction of tunnel No. 2 under the Keihin Intercity through the area of Tianjin Binhai International Airport. After the shield machine starts, it will successively pass through the key points such as Beijing-Tianjin-Tang Expressway, Jinhan Highway, Beitang Sewage River, and Li Mingzhuang Depot of Metro Line 2923, and enter the Jingbin Intercity Tianjin Binhai International Airport Station, which is 29 meters long and has a maximum buried depth of 82.<> meters, which has the characteristics of "large diameter, clay soil and high risk".

On December 12, the first shield machine of the second phase of the Keihin Intercity Project, which was undertaken by China Railway Fourth Bureau, began to excavate. Courtesy of Tianjin Municipal Transportation Commission

The first phase of the project will be completed and opened to traffic in 2022, and the second phase of the project will start construction in November 2022, starting from Beichen Station, passing through Dongli and Binhai New Area, and connecting to Binhai West Station of Tianjin-Qin High-speed Railway and Binhai Station of Jin-Wei High-speed Railway.

"The Keihin Intercity not only undertakes the passenger flow along the Beijing-Tianjin-Hebei line, forming the third intercity corridor between Beijing and Tianjin, but also an integral part of the auxiliary channel of the Beijing-Shanghai high-speed railway." According to Yin Xiangjun, director of the railway construction department of the Tianjin Municipal Transportation Commission, after the completion of the Keihin intercity line, a large-scale comprehensive transportation hub integrating railways, civil aviation, subway and other transportation modes will be formed at Tianjin Binhai Airport, which will further improve the structure of the Beijing-Tianjin-Hebei regional road network, provide more convenient and efficient travel services for the people in the three places, and help the development of regional economic integration. (ENDS)