At 15:06 on May 12, with the slow rotation of the cutterhead of the shield machine to break the hole door, it took 216 days to excavate 1442.42 meters from Ninghai Road Station, and the left line tunnel shield of Tianjin Rail Transit Line Z2 Line Binhai West Station to Ninghai Road Station (hereinafter referred to as "Binning Section") was successfully broken through and arrived at Binhai West Station to receive, realizing the successful grid connection with Tianjin Rail Transit Line B1, marking a key and important node in the construction of rail transit Z2 line.
The tunnels of rail transit line Z2 (middle) and line B1 (left 1, left 2) were successfully connected to the grid
With a total length of 39.268 kilometers, the first phase of Tianjin Rail Transit Line Z2 is an important project for the construction of transportation infrastructure in Tianjin, and also a key construction project of the "Top Ten Projects" for the construction of the beautiful "Bincheng". The project is invested and constructed by China Railway Binhai (Tianjin) Rail Transit Investment and Development Co., Ltd. and undertaken by China Railway Seventh Bureau Group Co., Ltd.
The reporter learned at the receiving site that the left line shield machine of the Binning section received by the Binhai New Station will start from Ninghai Road Station on October 10, 2023, and enter Binhai West Station after passing through the West Central Overpass, the B1 Line Tunnel of the parallel rail transit, Jinhai Lake and the large underground pipeline.
"The tunnel faces many risks during the construction process, the surrounding buildings (structures) are prone to settlement and deformation during the crossing period, and it is difficult to control the attitude of the shield machine in the water-rich and weak strata. This tunnel has passed through 6 strata and involves 12 risk sources, which can be called the "risk treasure pavilion" of shield tunneling. Wu Liyang, the project manager of the 07 bid of Tianjin Rail Transit Z2 Line of China Railway Seventh Bureau, said that in order to ensure the smooth tunneling of the shield machine, the project department planned in advance to set up an acceptance team, full data tracking and precision monitoring, 24-hour duty, and organized experts to demonstrate the plan and safety assessment, and simulated emergency drills on the spot. Various activities such as special labor competitions fully mobilized the enthusiasm of the construction personnel, laid a solid foundation for the smooth tunneling of the shield machine, and accumulated valuable experience for the start of the shield on the right line of the next Binning section.
Tianjin Rail Transit Line Z2 Binhai West Station to Ninghai Road Station shield section segment installation and construction
The first phase of Tianjin Rail Transit Line Z2 starts from Binhai Airport Station and ends at Beitang Station, with a total of 14 stations, the line connects Jinbin, connects the air and rail, mainly through the airport economic zone, high-tech zone, west area of the economic development zone, marine high-tech zone, Beitang and other key development areas, is an important rail transit line connecting the central city of Tianjin and Binhai New Area. After completion, it will become one of the important nodes to build "Beijing-Tianjin-Hebei on the track" and promote the coordinated development of the Beijing-Tianjin-Hebei region.
The tunnel shield of the left line of the shield section from Binhai West Station to Ninghai Road Station of Rail Transit Line Z2 was successfully broken through and arrived at Binhai West Station for reception
Source: Jinbin Net