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Bridge Launcher also known as bridge launching gantry, bridge girder erection machine, is a specialized piece of heavy machinery used in bridge construction. It is designed to lift and place bridge segments or girders into position during the construction of long-span bridges, particularly for segmental, beam, and box girder bridges. The launching gantry moves across spans, setting beams or segments in place with high precision, supporting the rapid assembly of bridge structures.
This heavy-duty equipment is essential for assembling bridge spans because it allows for exact positioning of girders over piers. Bridge girder erection cranes are widely used in highway, railway, and overpass construction, and they are critical for projects requiring great precision, efficiency, and safety while handling enormous structural components.
|
Item |
Parameters |
||
|
Capacity |
120 ton |
160 ton |
200 ton |
|
Span（m） |
30 |
40 |
50 |
|
Rated Lifting Capacity（T） |
120 |
160 |
200 |
|
Crane Longitudinal Moving Speed（m/min） |
4.6 |
4.6 |
4.0 |
|
Crane Transverse Moving Speed（m/min） |
4.6 |
3.31 |
2.87 |
|
Trolley Longitudinal Moving Speed（m/min） |
4.6 |
4.6 |
1 |
|
Trolley Transverse Moving Speed（m/min） |
1.7 |
1.4 |
1.8 |
|
Rated Power（KW） |
85 |
95 |
140 |
|
Self Weight（T） |
115 |
165 |
225 |
Beam Launcher Structure: The main girder of the bridge girder erection crane is a large horizontal beam that forms the backbone of the crane. It is built from reinforced steel, the main girder can withstand enormous loads and the stress of lifting and moving heavy bridge segments.
Lifting Trolley: This mechanism contains dual hoists that can lift each side of the girder, resulting in balanced and stable lifting. These hoists are built for precision control, which is required for safely installing long and heavy girders. It is motorized and moves smoothly along the main girder, providing accurate positioning of the load.
Gantry Structure: This framework holds the main girder in place above the construction site and is equipped with wheels or tracks that allow the crane to move along the bridge span. The Telescopic Legs support legs can be modified to different heights according on the site's requirements and the bridge's design, allowing the crane to handle bridges of various elevations.
Safety System: A range of safety features are installed to ensure safe operation during heavy lifting jobs. The overload protection system protects the crane from lifting over its maximum capacity, lowering the danger of equipment failure or accidents. This technique keeps the weight stable during lifting and transit, reducing sway that could cause damage to the girder or nearby structures.
Winch System: This system is responsible for lifting and lowering the girders using steel cables or ropes. It works in tandem with the hydraulic system to generate the required lifting force. These winches are designed to carry the weight of extremely heavy girders, ensuring safe lifting operations. The winch system includes load sensors to prevent overloads and improve lifting safety.
Hydraulic System: The hydraulic system drives the crane's movement operations and provides the force required to raise large bridge girders. This mechanism is placed in crucial places and allows for smooth, regulated, and strong movements. This hydraulic system enables for fine adjustments, which are essential for safe and correct girder positioning during installation.
1 High Lifting Capacity and Span: Bridge girder erection cranes are designed to handle extremely massive and heavy girders, weighing anywhere from 100 to over 1000 tons. They can also support broad spans between piers, making them ideal for large-scale bridge projects.
2 Segmental Lifting Mechanism: Equipped with dual lifting mechanisms that allow for precise lifting and placement of long bridge girders in segments, ensuring stability and reducing structural stress during the erection process.
3 Multiple Operation Modes: A range of operating modes are available, including front, rear, and side beam placement, allowing for flexible girder positioning to fulfill the special requirements of complicated bridge building layouts.
4 Self-Propelled Structure: The crane is frequently mounted on a self-propelled gantry system, which allows it to move along the bridge structure, reposition itself, and install several girders without requiring further transportation or setup.
5 Advanced Control Systems: Integrated with cutting-edge control systems, including remote and automatic control capabilities. These technologies let operators to precisely adjust movements and positions, which improves girder placement accuracy.
6 Modular Design: Huasui bridge girder erection cranes are designed with a modular structure that allows for simple assembly, disassembly, and transit between project sites, making them an economical choice for many projects.
1 Highway and Railway Bridges: Commonly used in the construction of large-span highway and railway bridges.
2 Urban Elevated Roads: Ideal for building elevated roadways in urban areas with limited ground space.
3 Viaducts and Overpasses: Employed in constructing viaducts and overpasses over rivers, valleys, and other obstacles where conventional scaffolding is impractical.
4 Segmental Bridge Construction: Widely used in segmental construction methods, where pre-cast segments are placed and joined to form the bridge deck.
