300 Ton Counterweight Bridge Erecting Machine

A 300-ton counterweight bridge erecting machine is a heavy-duty piece of equipment used in the construction of bridges, particularly for lifting and placing large precast segments or girders. These machines are essential for assembling bridges efficiently, especially in challenging environments like highways, rivers, or deep valleys.

 

 

A 300-ton counterweight bridge erecting machine is a heavy-duty piece of equipment designed for the construction and installation of large bridge segments, typically in precast segmental or balanced cantilever construction methods. Below are its key features:

1. High Load Capacity (300 Tons)
Designed to handle precast concrete segments or steel girders weighing up to 300 metric tons.

Robust structural design ensures stability during lifting and positioning.

2. Counterweight System
Uses adjustable counterweights to balance the machine during segment erection.

Ensures stability and prevents tipping when handling heavy loads.

3. Self-Launching & Self-Propelled Capability
Can move forward along the bridge deck without requiring external cranes.

Equipped with hydraulic jacks or rail systems for controlled movement.

4. Adjustable Span & Height
Modular design allows adaptation to different bridge spans and heights.

Telescopic or extendable booms for precise positioning.

5. Hydraulic Lifting & Positioning System
High-precision hydraulic cylinders for smooth lifting and lowering.

Fine-tuning capabilities for accurate segment alignment.

6. Computerized Control System
Automated or semi-automated controls for precise operations.

Real-time monitoring of load distribution, stress, and alignment.

7. Safety Mechanisms
Overload protection sensors.

Emergency braking and locking systems.

Redundant hydraulic and electrical systems for fail-safe operation.

8. Multi-Functional Gripping System
Compatible with various segment types (box girders, T-beams, etc.).

Vacuum or mechanical clamping options for secure handling.

9. Weather-Resistant Design
Can operate in harsh conditions (wind, rain, extreme temperatures).

Corrosion-resistant materials for durability.

10. Quick Assembly & Dismantling
Modular components for easy transport and on-site assembly.

Reduces downtime between projects.

11. Compatibility with Different Bridge Types
Suitable for balanced cantilever, span-by-span, and incremental launching methods.

Works with concrete segmental bridges, steel bridges, and hybrid structures.

12. Energy Efficiency
Some models feature regenerative hydraulic systems to reduce power consumption.

Optional electric or hybrid power systems for eco-friendly operation.

 

 

General Specifications
Machine Type:

Counterweight Bridge Erector / Launching Gantry / Girder Erection Machine

Maximum Lifting Capacity:

300 metric tons (can vary based on configuration)

Span Range:

20m to 50m (adjustable for different bridge spans)

Working Width:

Adaptable to bridge deck widths (typically 10m–20m)

Lifting Height:

10m–30m (adjustable based on pier height)

Movement System:

Self-propelled with hydraulic walking system or rail-mounted

Travel speed: 3–5 m/min

Power Supply:

Electric + Hydraulic system

Voltage: 380V/50Hz (or as per project requirements)

Control System:

PLC-controlled with remote operation capability

Sensors for load monitoring and safety

Counterweight System:

Adjustable 100–300-ton counterweight for balance during launching

May use concrete blocks or steel weights

Structural Material:

High-strength steel (Q345B or equivalent)

Safety Features:

Overload protection

Anti-tilt sensors

Emergency braking system

 

 

A 500-ton bridge launcher is a heavy-duty piece of equipment used in bridge construction to lift, transport, and place large bridge segments. Below are the key components of such a system:

1. Main Structural Components
Launching Gantry (Main Frame) – The primary steel structure that spans the construction area and supports the launching mechanism.

Front & Rear Supports – Temporary supports that stabilize the launcher during segment placement.

Launching Nose (Optional) – An extendable front section that helps guide the bridge segments into position.

2. Lifting & Handling System
Hydraulic Jacks (500-ton capacity) – High-capacity jacks for lifting and positioning bridge segments.

Winches & Hoists – Electric or hydraulic systems for moving segments horizontally.

Trolley & Travel Mechanism – Allows movement of the lifting system along the gantry.

3. Movement & Propulsion System
Hydraulic Push/Pull System – Moves the launcher forward along the bridge alignment.

Track or Rail System – Provides a guided path for the launcher's movement.

Skidding Beams/Pads – Support surfaces for smooth sliding during launching.

4. Hydraulic & Power Systems
Hydraulic Power Unit (HPU) – Supplies pressurized oil to jacks and cylinders.

Control Panel (PLC-based or Manual) – Manages operations like lifting, launching, and alignment.

Electric Generators – Provide power for motors, controls, and lighting.

5. Alignment & Positioning Systems
Surveying & Monitoring Sensors – Laser guides or GPS for precise segment placement.

Adjustable Supports – Fine-tune the launcher's position for accuracy.

Leveling Jacks – Ensure stability on uneven terrain.

6. Safety & Auxiliary Components
Anti-Slip Brakes & Locking Pins – Prevent unintended movement.

Emergency Stop Systems – For immediate shutdown in case of failure.

Work Platforms & Access Ladders – For operator access during assembly and maintenance.

7. Transportation & Assembly Components
Modular Sections – Allows disassembly for transport to new sites.

Crane Attachment Points – For lifting and assembling the launcher.

 

 

 

 

A 300-ton counterweight bridge erecting machine is a heavy-duty piece of equipment used in the construction of large bridges, particularly for placing precast segments or girders. Here are some of its key advantages:

1. High Load Capacity
Capable of handling heavy bridge segments (up to 300 tons), making it suitable for large-span bridges, highway viaducts, and railway bridges.

Reduces the need for multiple cranes or additional support structures.

2. Enhanced Stability & Safety
The counterweight system balances the machine during lifting and positioning, minimizing the risk of tipping.

Ensures precise placement of bridge segments, reducing accidents and construction errors.

3. Efficient Construction Process
Speeds up bridge erection compared to traditional methods (e.g., scaffolding or cranes).

Allows continuous construction with minimal interruptions, improving project timelines.

4. Adaptability to Various Bridge Types
Suitable for segmental bridges, box girders, T-beams, and precast concrete bridges.

Can be used in different terrains, including urban areas, rivers, and valleys.

5. Reduced Dependency on Ground Support
Unlike traditional falsework, it requires less ground preparation, making it ideal for soft soil or water-crossing projects.

Minimizes environmental disruption.

6. Cost-Effective for Large Projects
Lowers labor costs by automating heavy lifting.

Reduces material waste and rework due to high precision.

7. Automation & Control
Modern machines feature PLC control systems for smooth operation.

Allows remote monitoring and adjustments for better accuracy.

 

 

A 300-ton counterweight bridge erecting machine is a heavy-duty piece of equipment used in the construction of large bridges, particularly for lifting and placing precast segments, girders, or box girders during the erection process. The counterweight system ensures stability and balance when handling heavy loads, preventing the machine from tipping over during operations.

Key Applications:
Precast Segment Erection – Used in balanced cantilever construction to lift and place heavy concrete segments (weighing up to 300 tons or more) for box girder bridges.

Launching Girders & Box Girders – Facilitates the installation of long-span steel or concrete girders in bridge construction projects.

Cable-Stayed & Suspension Bridges – Assists in positioning large deck sections where traditional cranes may not be feasible.

Railway & Highway Bridges – Commonly used in high-capacity bridge projects requiring precise placement of heavy components.

 

 

The production procedure for a 300-ton counterweight bridge erecting machine involves several critical stages, including design, material procurement, fabrication, assembly, testing, and commissioning. Below is a detailed step-by-step breakdown:

1. Design & Engineering
Requirement Analysis: Determine load capacity (300-ton), span length, lifting height, and operational conditions.

Structural Design:

Finite Element Analysis (FEA) for stress distribution.

CAD modeling of the main beam, legs, counterweight system, and hydraulic/pneumatic components.

Mechanical & Electrical Systems:

Hydraulic lifting mechanism design.

Control system (PLC-based automation for precision).

Safety systems (brakes, overload protection, emergency stop).

Approval & Certification: Compliance with international standards (ISO, EN, AISC).

2. Material Procurement
High-Strength Steel: For main girders, booms, and support structures (e.g., Q690 or ASTM A572).

Hydraulic Components: Pumps, cylinders, valves (from reputed suppliers like Bosch Rexroth or Parker).

Electrical Components: Motors, sensors, PLCs (Siemens/ABB).

Counterweights: Precast concrete or steel blocks (calibrated for balance).

3. Fabrication Process
A. Main Girder Fabrication
Cutting: CNC plasma/oxy-fuel cutting of steel plates.

Welding: Submerged arc welding (SAW) for longitudinal seams; robotic welding for precision.

Machining: Drilling and milling of connection holes.

Non-Destructive Testing (NDT): Ultrasonic/X-ray welding inspection.

B. Support Legs & Boom
Assembly of telescopic legs (if applicable) with hydraulic cylinders.

Boom construction with lattice or box-section design.

C. Counterweight System
Frame Construction: Steel frame to hold 300-ton counterweights.

Adjustment Mechanism: Hydraulic/pulley system for dynamic balancing.

D. Hydraulic & Electrical Systems
Piping & Wiring: Installation of hoses, pumps, and control panels.

Integration: Mounting sensors for load monitoring and tilt detection.

4. Assembly
Erection of Main Girder: Using cranes to position the girder on support legs.

Attachment of Counterweights: Secured with locking pins.

Installation of Hydraulics: Connecting cylinders to the lifting mechanism.

Electrical Integration: Wiring controllers, HMI, and safety devices.

5. Testing & Quality Control
Load Testing:

Static test: 125% of rated capacity (375 tons) for stability.

Dynamic test: Simulated lifting and traversal with 300 tons.

Functional Tests:

Hydraulic system pressure checks.

Emergency stop response.

Counterweight balance verification.

Certification: Third-party inspection (e.g., TÜV, Lloyd's Register).

6. Painting & Corrosion Protection
Surface Preparation: Sandblasting (SA 2.5 standard).

Coating: Epoxy primer + polyurethane topcoat for weather resistance.

7. Commissioning & Delivery
On-Site Assembly: Transported in modules; reassembled at the bridge construction site.

Operator Training: Safe operation and maintenance protocols.

Final Handover: Documentation (manuals, test reports, warranties).

8. Maintenance & Support
Periodic Inspections: Wear-and-tear assessment.

Spare Parts Supply: For hydraulic seals, electrical components, etc.

 

 

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: 300 ton counterweight bridge erecting machine, China 300 ton counterweight bridge erecting machine manufacturers, suppliers, factory