Tianjin, referred to as "Jin", is a provincial administrative region of the People's Republic of China. It is a municipality directly under the Central Government, a national central city, a megacity, an economic center in the Bohai Rim region, the first batch of coastal open cities, a national advanced manufacturing research and development base, a northern international shipping core area, a financial innovation operation demonstration zone, and a reform and opening up pilot zone. Binhai New Area is the municipal district, sub-provincial district, national new district and national comprehensive reform pilot zone of Tianjin City, and the first national comprehensive reform and innovation zone approved by the State Council.

　　It is reported that Tianjin Metro Line Z4 is one of the lines in the planning of Tianjin Rail Transit Metro. It is planned to construct 43.7 kilometers in advance, with 23 stations, 10 underground stations and 13 elevated stations. Metro Line Z4 is a very courageous rail transit line with a planned line length of 100 kilometers. It not only serves the Binhai New Area, but also serves the entire eastern part of Tianjin, with broad development prospects.

　　In the construction of Tianjin Metro Line Z4, the "double U+ box" segment assembly designed and manufactured by Hebei Dongfeng Shijing Railway Group Corporation played an extremely important role. It is understood that this formwork beam has a complex structure, high precision, strength, high degree of automation, light weight, and light and smooth appearance. It can be said to be a standout among the "segmental assembly" product family. According to China Construction Third Engineering Group Co., Ltd. According to people, there are few cases in the history of rail transit construction with the unique design concept of "segment assembly" and the demoulding process of prefabricated components.

　　Recently, the "double U+ box type" short-line method composite variable cross-section prefabricated cantilevered segment beam was successfully poured in the Tianjin Z4 project and successfully demoulded. The length of the casting segment is 3 meters and the weight is 102 tons. The technical gaps in related fields are also a demonstration of the strength of another major innovation of Hebei Dongfeng Shijing Railway Group.

　　Since undertaking the order task, the technicians and front-line employees of Hebei Dongfeng Shijing Railway Group Company have meticulously designed and produced for four months, delivered more than 500 tons of weight, four sets of segmental assembly and accessories to customers on time, and made technical clarifications. , Responsible for guiding the installation. The successful casting and successful model release this time was highly appraised by the relevant leaders of China Construction Third Engineering Bureau. They hope to continue to strengthen cooperation and work together for the early completion of Tianjin Z4 line to traffic.

　　Hebei Dongfeng Shijing Railway Group Co., Ltd. has received strong support and help from all walks of life since Beijing settled in Guangzong County Industrial Park, Xingtai, Hebei. At present, the total number of employees has grown to nearly 500, including more than 40 middle and senior technical personnel. With the help of reform, the group company has obtained dozens of national patents after nearly two decades of development, including: "the fifth generation prestressed assembled truss self-balancing test bench", segment assembly, prefabricated box girder, hydraulic Automatic disassembly and assembly of box girder inner mold, hydraulic automatic disassembly and assembly of box girder outer mold, hydraulic automatic walking hanging basket, etc. Since 2018, the group company has gradually increased investment in accordance with the needs of the railway market, continuously expanded the scale of reproduction, and helped China's railway construction and local economic development.