Recently, Guanghua Road Station, the first station of Beijing Metro Line 28 (formerly CBD Line), constructed by the China Railway 14th Bureau Group Tunnel Company, was officially excavated, and the main structure construction is about to be carried out.

Beijing Metro Line 28 Project

The line of Beijing Metro Line 28 starts at Dongdaqiao Station and ends at Guangqu East Road Station. The line is laid along Chaoyangmenwai Street, Knitting Road, Beijing East Railway Station, Maoxing West Street, and Guangqu Road. The line has a total length of 8.1 kilometers, all of which are underground lines. There are 9 stations on the whole line. From north to south, they are: Dongdaqiao Station, Jingguangqiao Station, Guanghua Road Station, Core District Station, Dawang Road Station, Beijing East Station, and Dawanglu Station. Jiaoting Station, Guangqu Road Station, Guangqu East Road Station. In addition to connecting with multiple urban rail transit lines through five transfer stations, the line will also connect two suburban railway lines at Beijing East Railway Station, including the Sub-Central Line and the Northeast Ring Line, to further improve the regional network.

It is understood that the Beijing Metro Line 28 Line 03 contract constructed by the China Railway 14th Bureau Group Tunnel Company is currently the fastest progressing bid section of the entire line, including one station and two sections, namely Guanghua Road Station, Jingguang Bridge Station ~ Guanghua Road Station Sections, between Guanghua Road Station and Core Area Stations, the total length of the line is 1.048 kilometers, and the stations and sections are constructed by the underground excavation method. As a key rail transit project built in the core area of the CBD, the project faces four major construction difficulties.

There are many pipelines: the main pilot tunnel of Guanghua Road Station is located under Knitting Road, and the station runs through many municipal pipelines to ensure the telecommunications, heating, water supply, electricity, rainwater, sewage, etc. in the CBD area. It can be said that ensuring the safety of pipelines is guaranteeing the lifeline of CBD "Normal operation.

Shallow soil cover: The main pilot tunnel of the station is covered with soil about 6 meters. The ground traffic is busy, and all efforts must be made to ensure road safety during the excavation of the main pilot tunnel.

Poor stratum conditions: The arch top of the main pilot tunnel is located in the silt and easy-to-collapse stratum, and advance support must be done to ensure construction safety.

Complex surrounding environment: The project is close to Beijing’s landmark buildings, including CCTV, People’s Daily, CITIC Tower (China Zun), Beijing Television and other well-known buildings. The construction area is surrounded by office buildings, high-end residential areas and old communities, and the construction environment is complex .

The average station distance of Beijing Metro Line 28 is about 1 km, which is the smallest distance between Beijing's rail transit network and connects most of the main office areas, urban residential areas and key functional areas in the CBD area. After the subway line is completed and put into operation, it will further open up regional connections, encrypt the regional transportation network, and greatly optimize the rail transit supply. Editor/He Yuting