Bridge Launcher Girder Crane

The Bridge Launcher Girder Crane is a specialized heavy-duty construction equipment designed for the precise and efficient erection of bridge girders, primarily used in highway, railway, and viaduct construction projects. Combining the functions of a crane and a girder launcher, this equipment ensures safe, stable, and high-speed installation of precast beams across spans.

Key Features:
High Load Capacity: Engineered to handle a wide range of girder sizes, including T-beams, box girders, and I-beams, with load capacities ranging from 100 tons to 900 tons, depending on the project requirement.
Advanced Safety Systems: Equipped with multiple safety features such as overload protection, anti-derailment devices, and emergency braking systems to ensure the utmost security during operations.
Flexible Design: Available in both single girder and double girder configurations to suit different terrain and construction needs, including curved bridge sections and complex environments.
Hydraulic and Electric Control: Integrated hydraulic systems for smooth lifting and launching, combined with precise electric control for accurate positioning of girders.
Modular Structure: The modular design allows for easy assembly, disassembly, and transportation, reducing on-site setup time and improving project efficiency.
Durable Materials: Manufactured from high-strength steel with anti-corrosion treatment to ensure a long service life, even in harsh working conditions.

1. Lifting capacity: 160 tons  (excluding spreader weight) 

2. Self-weight of the bridge erecting machine: 118 tons  (maximum weight of a single piece: 7t)

3. Wind resistance

No-load walking state: 8 level 

No-load anchoring state:  12 grades

Lifting state with full load: Level 7 

4. Lifting speed: full load:   0~1.0/min 

No load:  0~1.5 m/min  

5. Luffing speed:   0~0.6 m/min   (with load luffing)

6. Working range:   Rmin=7m   Rmax=12m 

7. The walking mode of the whole machine:  walking type (the oil cylinder is pushed up, and there is no load during the walking process)

8. Traveling speed of the whole machine:   The whole movement is 15m , including the anchoring disassembly, reversing the track, and positioning, the whole process takes no more than 2 hours.

9. No-load climbing ability of the whole machine:  ±3.5° 

10. Lifting height:  65m below the bridge deck, 1m above the bridge

11. Front and rear anchoring distance:    18m (16m, 19.5m)

12. The distance between the left and right support points during work:   outside 10.5m, inside 5.7m 

Distance between front and rear support points:  16.85m 

13. Lifting deflection angle:    horizontal bridge direction 1.5 degrees, longitudinal bridge direction 3.5 degrees

14. Spreader leveling performance:    With vertical and horizontal leveling functions

15. The installed capacity of the whole machine:   110Kw 

16. Stability factor of the whole machine:  meets the requirements of GB3811-83 ( various working conditions∑M>0 )

17. Product features and advantages: Double-width and two-way beam erection, step-by-step walking, counterweight cross-span, front and rear outriggers are equipped with hydraulic systems, outriggers can be adjusted by 0.8-1 meters, the main beam can be adjusted, and 45-degree inclined beams can be erected, etc.

1. Main Girder (Launching Girder / Truss)
The large, truss-like beam structure that spans the piers and supports the entire system.
Transfers loads from the hoist to the supports (piers or temporary supports).
2. Trolley / Hoisting Mechanism
Travels along the main girder.
Equipped with a winch or hoist for lifting, lowering, and positioning girders/beams.
3. Front & Rear Support Legs (End Carriages)
These legs rest on bridge piers or temporary supports.
Allow longitudinal movement of the whole launching girder along the bridge alignment.
Can be fixed or telescopic to adjust to span length.
4. Longitudinal Travel System
Consists of wheels, motors, and rail tracks.
Moves the entire launching girder forward to the next span once a girder is placed.
5. Lifting Winch / Hoist
Mounted on the trolley.
Provides the vertical lifting force for precast girders.
6. Hydraulic / Mechanical Jacks
Used to adjust the vertical and angular positioning of the girder crane or main girder.
Helps in aligning the launching girder to different pier heights or during span transitions.
7. Power System
Electrical motors or hydraulic power packs to drive hoists, trolleys, and travel mechanisms.
8. Operator Cabin or Remote Control System
For controlling the trolley, hoist, and movements of the entire system.
9. Safety Systems
Load limiters, anti-collision devices, wind sensors, emergency brakes, and limit switches.
10. Auxiliary Beams / Nose
The front nose is a lighter extension of the main girder to help guide the girder crane to the next span smoothly, reducing cantilever bending moments.

Sketch

1. High Efficiency
Allows for fast and precise placement of girders or segments.
Reduces overall construction time compared to traditional methods like scaffolding or temporary supports.
2. Cost Savings
Minimizes the need for temporary structures like falsework or scaffolding.
Reduces labor costs due to its automation and mechanization.
3. Versatility
Can handle various types of girders, including precast segments, I-beams, box girders, and T-beams.
Suitable for different bridge types such as highway, railway, and viaduct projects.
4. Improved Safety
Reduces the need for workers to operate in dangerous elevated areas.
Designed with safety features like anti-slip systems, overload protection, and emergency brakes.
5. Adaptability to Difficult Terrain
Can operate in areas where ground-based cranes or heavy lifting equipment would struggle, such as rivers, valleys, or highways with limited access below.
6. Large Lifting Capacity
Typically designed to handle very heavy loads, making them ideal for modern large-span bridges where precast components are massive.
7. Environmental Impact Reduction
Less on-ground disturbance compared to conventional methods, preserving surrounding ecosystems and reducing the environmental footprint.
8. Precision Control
Equipped with advanced control systems that allow fine-tuned positioning and alignment of girders, critical for high-quality bridge construction.

1. Bridge Construction
Precast Girder Placement: It is used to lift and position precast girders or beams onto the piers during the construction of highway, railway, or metro bridges.
Span-by-Span Erection: Commonly used in segmental bridge construction where segments are placed sequentially from pier to pier.
2. Viaduct and Elevated Structure Projects
Essential in projects involving elevated highways, railways, and metro systems, where placing beams over long spans is needed.
3. Difficult Terrain and Urban Areas
In areas where ground-based cranes cannot operate effectively (e.g., over water, busy roads, deep valleys), bridge launcher cranes provide a top-down erection solution.
4. Accelerated Construction Schedules
These cranes allow for faster beam erection, reducing the time needed for bridge construction and minimizing traffic disruption in urban projects.
5. Heavy Load Handling
Specifically designed to handle heavy and long precast beams (up to hundreds of tons), which is critical for modern infrastructure projects requiring large spans.
6. Curved or Complex Bridge Designs
Advanced launcher girder cranes can handle curved alignments or variable spans, making them suitable for complex bridge designs.

1. Design & Engineering
Project Requirement Analysis: Define technical parameters (span, lifting capacity, working conditions).
Design & Calculation: Perform structural calculations, finite element analysis (FEA), and prepare detailed drawings (mechanical, electrical, and hydraulic systems).
Approval Process: Submit design to client and/or third-party for approval.
2. Material Procurement
Material List Preparation: Steel plates, structural sections, hydraulic components, motors, gearboxes, control panels.
Sourcing: Purchase raw materials as per design specifications (certified steel, branded electrical and hydraulic components).
Quality Inspection: Inspect all incoming materials for compliance with standards (material certificates, dimensional check, NDT if needed).
3. Cutting & Machining
Steel Cutting: CNC flame/plasma cutting of steel plates and profiles as per drawings.
Machining: Precision machining of key components (bearing housings, connection holes, joints, etc.).
Edge Preparation: Beveling and cleaning of weld joints.
4. Welding & Fabrication
Sub-Assembly Welding: Weld smaller sub-assemblies (webs, flanges, stiffeners, etc.).
Main Structure Welding: Fabrication of the main girder, supports, trolley frame, and other large components.
Weld Inspection: Perform NDT (Ultrasonic Testing, Magnetic Particle Testing) on critical welds.
Stress Relieving: Post-weld heat treatment (PWHT) if required.
5. Surface Treatment
Shot Blasting: Blast all welded components to SA 2.5 standard (ISO 8501-1).
Painting: Apply primer, intermediate, and top coats as per client specifications (usually epoxy or polyurethane-based systems).
Coating Inspection: DFT (Dry Film Thickness) and adhesion testing.
6. Assembly
Pre-Assembly: Assemble mechanical parts such as winches, wheels, rail systems, trolleys, hydraulic cylinders.
Electrical Installation: Mount motors, sensors, control panels, and lay cables.
Hydraulic System Installation: Install hydraulic pumps, hoses, and cylinders.
Alignment & Adjustment: Ensure precise alignment of moving parts (trolley, hoist, rail wheels, etc.).
7. Testing & Commissioning
Functional Testing: Conduct dry runs for mechanical movements (hoisting, trolley travel, girder launching mechanism).
Load Testing: Perform static and dynamic load tests (typically 1.1 to 1.25 times rated load).
Safety System Testing: Verify emergency stops, limit switches, load indicators, and other safety devices.
Documentation: Prepare test reports, manuals, and compliance certificates.
8. Packing & Delivery
Dismantling: Disassemble major structures for transportation.
Packing: Protect sensitive components (hydraulics, electrical) with proper packaging (wooden crates, moisture-proof packing).
Marking & Shipping: Mark components with identification numbers for easy re-assembly on-site. Organize logistics for delivery to the job site.
9. On-Site Installation & Commissioning
Re-assembly: Assemble the crane on-site following approved erection procedures.
Final Testing: Conduct final testing under site conditions and handover to client.
Training: Provide operational and maintenance training to client personnel.

2. The production process begins with the design and engineering phase, where the technical specifications are established. This involves careful planning and analysis, taking into consideration factors such as the intended use, dimensions, weight capacity and location. Skilled engineers work together to create a detailed blueprint of the Bridge Girder Launcher, which serves as the foundation for the actual production.

3. The second phase of the production process involves the actual fabrication of the Bridge Girder Launcher. This requires the use of specialized equipment and expertise, as well as adherence to strict safety protocols to ensure a safe and efficient production process. Skilled technicians work with the materials to create the girder segments and launcher components, which are then assembled to create the final Bridge Girder Launcher.

4. Once the Bridge Girder Launcher is complete, it undergoes a rigorous quality control process to ensure that it meets all technical specifications and safety standards. This involves testing the Launcher's durability, weight capacity and accuracy in launching girders.

5. Throughout the entire production process, a positive and proactive attitude is crucial to ensure a successful project outcome. Each step requires careful attention to detail and perseverance, as well as a commitment to excellence and innovation.

6. In conclusion, the production of a Bridge Girder Launcher is a vital component of the bridge construction process. It requires the skills and expertise of a highly trained team, who work diligently and with a positive attitude to ensure a successful outcome. By maintaining a focus on quality, safety and innovation, we can continue to build the infrastructure that will shape our future.

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.

Hot Tags: bridge launcher girder crane, China bridge launcher girder crane manufacturers, suppliers, factory