On April 29, 2021, the first 8-section marshalled subway train of Type A train of Metro Line 20 arrived at the Airport North Depot, and Shenzhen's first unmanned smart subway line was officially picked up. At the site of the Metro Line 20 project, the home of the "smart train" in the airport north depot parking lot has realized the function of picking up cars, and more new cars will arrive here for parking and debugging in the future. According to the project schedule, the unmanned train will be hot-sliding here at the end of May, and it is expected that it will be opened to carry passengers at the end of 2021.

The first phase of Metro Line 20 is about 8.43 kilometers long, with 5 stations and 1 depot, connecting Shenzhen International Convention and Exhibition Center and Bao'an International Airport, with a design speed of 120 km/h.

The first phase of the Line 20 project started in September 2016. In January 2018, the civil structure engineering and equipment room masonry engineering were basically completed. The equipment installation and decoration works after the station started on May 1, 2020. Since the start of construction, it has faced difficulties such as tight schedules, high technological standards and many constraints on cross-construction. In order to solve the cross-construction problem, the project department adjusted the management authority of each unit in a timely manner according to the process conversion, and clarified the boundaries of management responsibility. In order to ensure that the on-site construction and production advancement continues and completes the project node on time, China Railway Construction South has increased the entry of elite soldiers and mechanical equipment in advance, led the main management personnel of the project and the work area to stay in the New Year, and organized more than 800 participating workers through incentive measures Stay on site and maintain normal construction during the Spring Festival.

In order to ensure the continuous and strong promotion of on-site construction and production, China Railway Construction South gave full play to its technical advantages, introduced an intelligent safety management system for track areas, and adopted AEB intelligent braking system to improve safety performance. A number of new technologies and intelligent systems were applied in track laying, effectively reducing Probability of group safety accidents when driving in the track area.

The first fully automated unmanned subway

Zhu Wei, the project manager of China Railway Construction Shenzhen Metro Line 20, said: “The train that came to the Airport North Depot today uses an A-type aluminum alloy drum car body with 8 formations and a maximum operating speed of 120km/h. It is compatible with Shenzhen Metro No. 20. The full-automatic driving system of the Metro Line will give trains a series of functions such as automatic wake-up, automatic departure, precise parking, and automatic detection." The Airport North Depot of Metro Line 20 is located to the north of the airport and includes maintenance depots, operating depots, engineering and dispatching. Garages, complex buildings and various auxiliary rooms.

According to reports, the Shenzhen Metro Line 20 project is also the world’s first batch application of vehicle-to-vehicle communication technology. Compared with the traditional vehicle-ground-vehicle communication technology, it optimizes the vehicle control process and greatly improves train operation efficiency, safety and reliability. Sex. The comfort of the train has also been improved. In order to alleviate the pressure fluctuation and noise caused by the 120km/h operation, the train has adopted a series of measures to improve the air tightness of the vehicle and ensure the comfort of passengers when the vehicle enters and exits the tunnel. At the same time, the train uses sound-absorbing and noise-reducing materials on the floor and side walls, and comprehensively designs the overall air circulation in the train to further reduce noise.

The smooth arrival of the first subway train marked another crucial step towards the official opening of the first phase of Metro Line 20. Metro Line 20 will begin trial operation at the end of August, and commercial operation will begin at the end of the year, and will be transferred to Metro Line 11, ending the situation that Shenzhen International Convention and Exhibition Center is not accessible by subway. Editor/He Yuting