The quality of anti-collision corrugated guardrail installation directly impacts its overall stability and aesthetics. Installing these guardrails on modern highways is a well-established road construction technique. The specific preparatory steps are outlined below:
1. Pre-Construction Preparation:
- Project Team Establishment: Form a dedicated project team to serve as the technical and managerial core. Establish comprehensive construction and personnel management systems to ensure safe and efficient work practices.
- Document Review & Planning: Thoroughly review construction documents, finalize construction plans, and establish a realistic schedule. Conduct safety training for all personnel, emphasizing safety awareness. Analyze local weather patterns and geological conditions for long-term planning and assign individual responsibilities.
- Trial Piling & Approval: Conduct trial piling and obtain approval from geological supervision and engineering personnel before proceeding with full-scale installation.
2. Material Inspection:
- Materials should be inspected based on relevant regulations, including random sampling. Verify that material dimensions, specifications, and manufacturing processes comply with the design drawings.
3. Setting Out:
- Benchmark Establishment: Accurately identify and mark benchmarks, ensuring their precise positioning, particularly in areas with steep slopes and curves. Avoid any blind spots without benchmarks.
- Benchmark Verification & Recording: Double-check the accuracy of benchmark locations, maintain detailed records, and clearly mark them for easy identification during final inspection and acceptance.
- On-site Adjustments: In case of discrepancies between the site conditions and the design drawings, adapt the construction plan and methods accordingly. Secure approval from the supervising authority for any modified plans before implementation.
4. Piling:
- Piling is the most crucial step in guardrail installation. Accurate spacing, verticality, and positioning of each post are critical for compensating for minor deviations during the setting-out process, ensuring the overall stability and visual appeal of the finished guardrail system.
- Piling Methods: Current piling techniques primarily include guide-rod diesel pile drivers and hydraulic pile drivers. However, the former’s high mobility and challenging control often lead to road surface damage and slope instability. Consequently, hydraulic pile drivers are now favored due to their precise control, reduced impact on surrounding structures, and faster installation speed.
By meticulously following these preparatory steps, a solid foundation for a safe, durable, and aesthetically pleasing corrugated guardrail system can be established.
