With urbanization advancing rapidly, the construction of road and bridge engineering is increasing, with cantilever form traveller technology being widely applied, particularly in the construction of large-scale road and bridge projects. This technology features a heavy structure with characteristics such as high rigidity, minimal deformation, fast construction speed, and ease of operation. This article outlines the principles of cantilever form traveller construction and discusses quality control measures to ensure the quality of road and bridge construction.

1. Principles of Cantilever Form Traveller Construction

The cantilever form travellers in road and bridge construction consists of the main structure, traversing system, cantilever system, and specific operation systems. The main structure bears the primary load of the form traveller, while the traversing system facilitates its movement. It's important to pay attention to ensure smooth movement. The forming travellers is equipped with internal and external steel formwork to protect construction workers' safety. The application of cantilever form travellers technology provides flexibility in high-altitude concrete pouring, avoiding the complexities associated with large cranes. Its simple structure is adaptable to various construction environments, improving construction convenience and quality.

2. Quality Control of Cantilever Form Traveller Construction

Quality control in cantilever form travellers construction includes:

2.1 Quality control of prestressed tendon tensioning: Proper cement slurry mixture during installation ensures adequate compaction time. The quality of prestressed tendon tensioning significantly affects the construction quality. Rusting of improperly anchored rebars can alter tension, necessitating strict control measures.

2.2 Control of the main structure deflection: In large-span road and bridge projects, controlling deflection is crucial. Adjustment of road and bridge alignments and changes in prestress help control deflection.

2.3 Quality control of cantilever concrete pouring: Enhancing concrete pouring quality increases basket load-bearing capacity. Accurate calculations of basket loads are crucial for safety. Supervision by monitoring units supplements construction checks to ensure safety. It's crucial to pay close attention to prevent basket rotation and maintain sufficient pouring time.

3. Other Safety Considerations

3.1 Strengthen safety education and technical disclosure. All construction workers should receive safety education and technical disclosure before construction.

3.2 Enforce strict safety discipline and prevent violations.Construction and safety management personnel should monitor and enforce safety regulations throughout the process.

3.3 Strengthen inherent safety management. Seal barriers around the basket and inspect anchoring devices, rods, nuts, and safety devices to ensure compliance with safety standards.

3.4 Cease construction in severe weather conditions. Construction should halt at wind speeds exceeding level 6 and in rainy or snowy conditions.

3.5 Ensure adequate lighting. Sufficient lighting must be provided for nighttime construction to ensure worker safety.

Conclusion

In conclusion, the widespread application of cantilever form travellers construction in road and bridge engineering offers simplicity and flexibility but requires stringent quality control measures due to its high-altitude and complex structure.