China-Beijing Metro Line 12 started construction in 20 16 and is expected to be put into operation by the end of 20021.
Beijing Metro 12 line starts from Sijiqing Station in Haidian District in the west, passes through Xicheng District, and ends at West Exit Station of Guanzhuang Road in Chaoyang District in the east.
Under the busy Heping West Bridge, an underground subway station is stepping up construction on both sides of the overpass pier. On the afternoon of March 4, the reporter went to the construction site more than 20 meters underground, and the workers were digging underground. According to reports, at present, the subway 12 line 19 section is under construction, all of which have resumed work, and most of the sections have entered the main structure construction.
Xin xian chuan Chao Haidong Xicheng the fouth districts
Subway 12 Line and Heping Xiqiao Station are located under the North Third Ring Road, and Line 5 is on the north side of Heping Xiqiao Station. The station is an island station with two floors underground. The upper and lower platforms and tracks are located on the south and north sides of Heping West Bridge respectively. After the completion of the station, T-channel transfer will be adopted, and two transfer channels will be set between the station and Line 5. Passengers who walk less than 100 meters can transfer between the two lines.
Heping West Bridge Station has complex soil, large traffic volume on the ground and many pipelines with water pressure, so the construction is very difficult. "The nearest place to the residential building is only 3 meters, and it is only 2 meters away from Heping West Bridge. It is necessary to ensure the safety of residential buildings and control the settlement of overpasses. " Wang Qing, the project manager in charge of the construction of 12 line and Heping Xiqiao Station, said that Heping Xiqiao Station * * has five super-level risk sources, and 1 19 first-level risk sources. At present, the primary supporting arch and secondary lining arch of the station's key lines have been fully restored.
"Heping Xiqiao Station is currently the largest water stop underground excavation station in Beijing, and there is no precipitation during construction." According to Wang Qing, underground excavation with water stop can save a lot of groundwater and protect water resources, but it requires high construction technology. "The most taboo of underground excavation is the operation with water, so various technologies such as grouting are adopted in the construction to ensure waterless construction."
Beijing Metro 12 Line passes through Haidian District, Xicheng District, Dongcheng District and Chaoyang District. The main line is about 29.6 kilometers long, all of which are underground. Station 2 1 block, of which transfer station1block 5. 12 line is parallel to the northern section of 10 line, which can reduce the passenger flow pressure at the main transfer nodes of 10 line and provide more choices for citizens to travel by subway.
Subway 12 line is the underground traffic line of the North Third Ring Road, and the 12 station in the 2 1 station is located in the North Third Ring Road. The line needs to cross a large number of bridge areas and main roads, which makes the construction difficult and brings great pressure to the construction period. Wang Yulong, Deputy Director of the Engineering Department of Metro 12 Line of the Municipal Rail Company, said that at present 12 Line 19 section is under construction and has all resumed work. Except for Tiancun Parking Lot, Dongba Depot, Access Line and Bid Section I, all other lines have entered the main structure construction.
Three-color card realizes personnel partition management
At present, it is a critical moment for epidemic prevention and control in the capital. Facing tens of thousands of construction workers, the city rail company developed the "information reporting system for personnel entering the construction site". People who enter the site only need to scan the code on their mobile phones and open small programs, and fill in information such as physical condition, contact history, return situation, travel trajectory, etc. on that day, so as to complete the data report, which not only ensures the accurate investigation every day, but also ensures the prevention and control of the construction site and the health and safety of construction workers, and minimizes the limited energy of construction workers to fill in forms, summarize, count and other complicated things.
Wang Xiaoqiang, chief engineer of the Municipal Rail Company, said that every builder can use the system to quickly summarize and upload the information of the lines that the Rail Company is responsible for building. The advantages of the system, such as stable operation, accurate data and timely submission, have gradually emerged, providing accurate epidemic prevention and control information for the resumption of rail transit construction.
"For the transportation of workers returning to work outside Beijing, the construction unit arranges point-to-point transportation by special car, and reports the driving and personnel information to the system of the community, the construction Committee, the construction unit and the rail company in advance." Wang Yulong introduced that at present, according to the time of returning to work, the construction personnel are managed at different levels; For migrant workers who have returned to Beijing for less than 14 days, no more than 4 people will stay, and non-contact food delivery and individual dining will be adopted.
At the construction site of Heping West Bridge Station, the construction unit implements the three-color brand management system to avoid crossing. The living quarters shall be closed in different zones and time-sharing, so as to reduce the cross-flow of people. They are divided into red, yellow and green zones, and the stairway is divided according to different zones. Workers wear reflective vests and armbands in red, yellow and brigade colors. Green means concentrated observation has been over 14 days, yellow means within 14 days, and red means emergency isolation. At present, all workers entering the construction site have completed the observation for 14 days, and have worn green reflective vests and armbands for easy identification.