Intelligent tensioning equipment and double-acting hydraulic jacks.
Dafang Company Undertakes Liberia Bridge Project: A Cross-Border Application of Intelligent Tensioning and High-Precision Hydraulic Technology
With the booming global development of infrastructure, overseas bridge projects are demanding unprecedented levels of construction precision and equipment reliability. Recently, the Liberia bridge project undertaken by Dafang Company has been progressing steadily. Serving as the core technical backbone of the project, our company’s intelligent tensioning equipment and series of double-acting hydraulic jacks have played a pivotal role during the prestressing phase, ensuring both the structural safety and construction efficiency of this vital transportation artery.
As a key local infrastructure project serving the public interest, the Liberia Bridge features a long-span design and is subject to complex climatic conditions—factors that impose exceptionally high requirements on the prestressing work for the main bridge structure. Traditional manual hydraulic systems, characterized by slow return speeds and lower efficiency during intensive operations, could not fully meet the project’s demanding schedule. Consequently, the company opted for a highly automated, intelligent tensioning system.
Compared to conventional manual hydraulic pumps and standard jacks, this intelligent tensioning system utilizes PLC control to manage bidirectional movement. It delivers precise tensioning force and offers significantly faster return speeds, proving to be a vital asset in overcoming the project’s critical technical challenges.
Core Technology Analysis: Synergistic Operation of Key Hydraulic Equipment
In the specific operational scenarios of bridge prestressing and structural lifting, a single type of equipment often struggles to handle complex load requirements. Based on the specific construction characteristics of the Liberia bridge, we custom-engineered a range of high-performance hydraulic cylinder products:
1. Hollow-Core Design Solves Tensioning Challenges
Double-acting hollow jacks play an indispensable role in steel strand tensioning operations. Their unique hollow design allows the steel strand to pass directly through the jack body; when paired with the intelligent tensioning system, this enables real-time data synchronization between jacking force and strand elongation, keeping the margin of error within 1%.
2. Optimized Design of Plungers and Piston Rods
To handle the heavy-tonnage launching and adjustment required for the bridge, the project team utilized hollow-plunger and hollow-ram double-acting hydraulic jacks, both characterized by high resistance to off-center loads. While delivering immense lifting force, their double-acting return mechanism effectively prevented schedule delays often caused by the jamming issues associated with traditional return systems.
3. Structural Lifting and Integrated Support
During the bridge deck paving and bearing installation phases, these high-quality double-acting hydraulic jacks served as the core components of a synchronized lifting array. Under the unified coordination of a central control system, multiple jacks achieved millimeter-level synchronization in lifting and lowering, successfully overcoming the challenges of installing large-scale structural components.
Intelligent Prestressing: A “Smart Brain” Made in China
Robust hardware relies on precise software control. The intelligent prestressing equipment deployed by Dafang Company for the Liberia bridge project truly achieved “one-touch” prestressing operations.
The system automatically reads data from the double-acting hydraulic jacks‘ pressure sensors, calculates elongation, and performs real-time verification. This eliminates the errors and safety risks inherent in traditional manual measurements while ensuring full data traceability throughout the process. This combination of an intelligent system and powerful double-acting hydraulics not only filled several gaps in local infrastructure technology but also earned high praise from the project owner and supervisors.
Conclusion
The successful execution of the Liberia bridge project not only demonstrates Dafang Company’s outstanding engineering capabilities but also marks another milestone in bringing our intelligent prestressing equipment and high-performance double-acting hydraulic jack series to the international market. Moving forward, we remain committed to the philosophy of “Quality First, Technological Innovation,” contributing to global infrastructure development with increasingly professional and intelligent hydraulic equipment.