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A segment launching gantry is specialized equipment that divides a bridge into multiple precast concrete segments produced in a factory, transports them to the site, and sequentially assembles them into a complete bridge span. It is suitable for use in locations where transporting full-span components is difficult or in complex terrains such as river or road crossings.
A segment launching gantry is a specialized device used for constructing concrete bridges. It precisely assembles factory-precast concrete segments on piers one by one to form a complete span, which are then integrated into a whole by prestressing tendons. This method offers high construction accuracy, causes minimal disruption to traffic below, and is suitable for projects such as urban viaducts and sea- or river-crossing bridges.
Main Features of Segment Launching Gantry:
Bridge segments are prefabricated in factories, ensuring quality control.
Segment prefabrication and on-site assembly can proceed simultaneously, significantly shortening the construction period.
Suitable for use in areas with complex terrain or heavy traffic.
Most operations are conducted at deck level or above ground, minimizing disruption to activities below the bridge.
Equipped with precise hydraulic and electrical control systems for accurate segment positioning and assembly.
Main Applications of Segment Launching Gantry:
Bridges crossing rivers, bays, and deep-water areas.
Bridges spanning major transportation corridors.
Urban elevated roads and interchanges.
Long-distance, multi-span standardized bridges.
Elevated rail transit lines (subway, light rail).
Product Details
Main Girder/Main Beam: The primary load-bearing and force-resisting structure, also providing the track for the hoisting trolley.
Front Leg: Located at the foremost end of the main girder, providing support during the installation of new segments.
Middle/Main Leg: Positioned at the mid-section of the main girder, serving as the main load-bearing leg and supporting the majority of the weight.
Rear Leg: Located at the tail end of the main girder, providing auxiliary support.
All legs are equipped with hydraulic cylinders for height adjustment, load-bearing, and advancing the equipment.
Hoisting Trolley/Lifting Trolley: Moves along the tracks of the main girder, equipped with winches, lifting frames, and hangers.
Hanger/Hoisting Frame: Used for gripping and suspending precast segments.
