As a Shinkansen that builds a happy life, the subway has transformed from a simple means of transportation to a service platform that aggregates elements of life and disseminates urban culture. At present, the first phase of Tianjin Metro Line 11 is in trial operation of the east and west sections. According to the relevant arrangements for the trial operation, from October 13, 2024, Line 11 will use a new version of the train timetable, on the one hand, to provide more convenience for passengers to travel at night, and on the other hand, to make full preparations and lay a good foundation for the subsequent operation of the whole line. The biggest change is that the daily operating time has been extended by 40 minutes, and the adjusted last train time is 23:55, and a new Zhaoyuan Road station has been added to the original first train departure station, with a minimum travel interval of about 5 minutes to improve the commuting efficiency of passengers.
Figure The platform of the Cultural Center Station of Line 11
The first phase of Metro Line 11 starts from Nankai District Water Park West Road Station in the west to Liujing Road Station in Dongli District in the east, with a total of 23.8km and a total of 21 stations. The eastern section (Dongjiang Road Station - Dongli Liujing Road Station) is 13.7km long, with 11 stations and 10 sections, and has been put into operation in December 2023 as a popular project last year. The western section (Water Park West Road Station - Dongjiang Road Station) is one of the 20 popular projects this year, with a length of 10.1km, including 10 stations and 10 sections. The line passes through many important areas such as Tiankai Park, Balitai, Cultural Center, New Badali, Chentang Business District, Haihe Liulin Design Capital, Dongli Development Zone, etc., and plays an important role in connecting the central urban area with the middle reaches of the Haihe River.
Crossing the Haihe River, advanced technology overcomes difficulties
The subway is like a huge and complex machine, and reliable operation is the basic guarantee of its operation, and the breakthrough of Line 11 has condensed the wisdom and hard work of countless subway builders. "This line passes through the Haihe River and the downtown area of the central city, which is difficult to construct and has high technical requirements." Liu Gang, chief engineer of China Communications Construction Tianjin Metro Line 11, said that under the guidance of the Municipal Commission of Housing and Urban-Rural Development, the project adopted evaporation, condensation and direct expansion technology and vacuum drainage technology for interval tunnels for the first time in Tianjin Metro, effectively solving the problems of cooling tower land occupation, noise disturbance and incomplete drainage. In addition, the application of advanced technology methods such as intelligent construction, digital assembly, and BIM guidance has greatly improved work efficiency and overcome many problems such as shield tunneling crossing the Haihe River, passing through key areas, and high groundwater level in Tianjin.
It is worth mentioning that the train of the line has a lightweight design, reducing the weight of each train by nearly 7 tons, which is the lightest weight of all the trains in Tianjin now, which not only greatly reduces the energy consumption but also increases the capacity. The train signaling system adopts the integrated design of "signal + traction + braking", which has high control accuracy, green and energy-saving operation, and greatly improved ride comfort.
During the construction of the project, the Municipal Commission of Housing and Urban-Rural Development attaches great importance to organizing various departments and relevant districts to form a joint force, and conducts a detailed and in-depth investigation and analysis of the geological and hydrological conditions and risk sources along the interval in view of the risk of shield crossing the Haihe River, and uses scientific and technological means such as unmanned ship single-beam echo sounder to carry out accurate mapping of the underwater terrain of the Haihe River, scientifically formulate a crossing plan, and invite experts to demonstrate and determine, and at the same time strengthen emergency practical drills to ensure that the risk source of crossing is foolproof.
In the process of shield crossing, a 24-hour duty system is implemented, the construction parameters are scientifically adjusted according to the changes of stratum and water depth, and the shield attitude is corrected in time, so as to finally achieve zero leakage and zero damage in the tunnel, zero early warning and zero pollution on the river surface. In addition, through on-site service, meeting coordination and other ways, hundreds of problems have been coordinated and solved, which has effectively guaranteed the implementation of the project.
Innovative services help improve a better life
While the construction of the project provides convenience for citizens to travel, it is also constantly innovating various humanized services to realize a high-tech subway, a green subway, a safe subway, and a harmonious subway. According to Cui Shouyuan, deputy general manager of China Communications Construction Tianjin Metro Line 11, all the operating vehicles of the line are equipped with temperature and humidity and passenger density monitoring systems to ensure the comfort of the station environment and provide passengers with a comfortable riding environment; Mother-and-baby rooms are set up at all stations, and facilities such as electric sliding doors, children's handwashing stations and urinals are used in mother-and-baby rooms and barrier-free toilets. Each group of turnstiles is equipped with two face recognition channels, which is currently the most set line in Tianjin; A light-box subway entrance and exit logo is set on the top of the mask shed to facilitate passenger identification.
The continuous extension of the subway network not only shortens the distance between time and space of the city, but also promotes the process of urbanization and helps speed up the people's better life. Zhao Xiaoyang, director of the Major Projects Office of the Municipal Housing and Urban-Rural Development Commission, said that the western section of Line 11 connects important places such as culture, education, medical care and commerce, which not only improves the quality of life and transportation efficiency of surrounding residents, but also can drive cultural tourism, industrial development and consumption in the central urban area.
For example, the West Water Park Road Station connects to Tiankai Park; Balitai Station is located at the entrance of Nankai University; Tonglou Station and the Second Hospital Station of the Medical University can facilitate medical treatment; The cultural center station provides convenience for the leisure activities of the masses; Neijiang Road Station and Chentang Station can serve the new Badali and Chentang business districts. In addition, there are 6 stations in the western section that have set up public art works with Tianjin's historical and cultural characteristics, echoing the decoration style of the station, so that the public can feel one station and one scene during the ride and experience the cultural characteristics of Tianjin.
At present, the western section of Line 11 is undergoing no-load trial operation to test the availability and safety of the equipment system. The main project has been completed, and the decoration construction of the entrances and exits of each station and the ground hall, the pipeline reset, the road and the restoration of greening are being carried out in an orderly manner. According to the plan, it will be opened before the end of this year. (Jinyun News reporter Bai Sijie)