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Prefabricated segment assembly system

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The segmental assembly template is a special mold with complex structure and high precision designed according to the prefabricated segmental assembly of bridges. It is mainly composed of outer mold, inner mold, bottom mold, end mold, hydraulic and electrical systems. The system is divided into long-line and short-line methods according to different prefabrication methods, and divided into dry segment assembly and wet segment assembly according to different forms of seams.The formwork has sufficient strength, rigidity and stability. It can ensure the correctness of the design shape, size and mutual position of each part when it bears the gravity, lateral pressure of the newly poured concrete and various loads during the construction process.

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Prefabricated segment assembly system

The system is divided into long-line and short-line methods according to different prefabrication methods, and divided into dry segment assembly and wet segment assembly according to different forms of seams.The formwork has sufficient strength, rigidity and stability. It can ensure the correctness of the design shape, size and mutual position of each part when it bears the gravity, lateral pressure of the newly poured concrete and various loads during the construction process.

　The long-line method requires the inner and outer molds to be able to move along the longitudinal direction of the pedestal according to the form of the prefabricated pedestal, without the bottom mold and occupying a long space. In the short-line method, each segment is poured in the same mold. One end is used as a fixed mold and the other end is a segment that is poured first. The template does not move. After the beam section is removed from the bottom mold, the bottom mold returns to the original In this way, the bottom mold needs at least two sets of running water. Dry segmental assembly construction can adopt long-line method construction and short-line method construction. Wet segmental assembly generally refers to short-line method construction.

Dry connection method segment assembly system engineering case


Construction unit: China Construction Third Bureau Group Co., Ltd. Project Name: Phase I Project of Track Z4 Line in Tianjin Binhai New Area Type: U box segment continuous beam (40+65+40) (37.5+60+37.5) universal

Construction unit: Shanghai First Municipal Engineering Co., Ltd. Project name: Thailand Manna Expressway (Bang-NaExpressway) Type: Short-line method construction dry connection type, prefabricated sections each span 114 sections

Construction unit: India Gorakhpur Construction Company Project Name: Phase II of Delhi Rail Transit Project, India Type: Short-line construction method of dry connection, adjustable web thickness, minimum line radius of 302 meters

Wet joint segment assembly system engineering case


Construction unit: China Railway Eleventh Bureau Group Co., Ltd. Project Name: Newly-built Yellow River Bridge Project of Hohhot to Zhungeer Railway Type: Ballasted track prestressed concrete simply supported box girder-48.4 meters

Construction unit: China Railway Tunnel Co., Ltd. Project Name: The Seventh Division of Zhangtang Railway Project Management Department Type: Prestressed concrete simply supported box girder on a passenger-cargo railway with a speed of 160 kilometers per hour—48 meters

Construction unit: China Railway Eleventh Bureau Group Co., Ltd. Project Name: Panzhihua to Miyi Section of Chengkun Railway Type: Prestressed concrete simply supported box girder for passenger and freight railroads with a speed of 200 kilometers per hour—60 meters