Tunnel – Culvert Rehabilitation
Corrugated steel structures are widely used to repair old culverts and bridges by installing a steel structure inside an existing one. This method is known as "Rehabilitation." The gap between the old structure and the new corrugated steel structure is filled with concrete of at least C16/20 grade. This reinforcement technique allows for the strengthening and reconstructing old structures without disrupting traffic, eliminating the need to remove or demolish the existing structure. Additionally, it offers the advantage of preserving the style and aesthetics of the old structure. If the old bridge lacks aesthetic appeal, the reinforcement process can provide a completely new appearance with excellent architectural value.
Why Is Rehabilitation Necessary?
Rehabilitation of reinforced concrete structures is often required due to wear and tear caused by various external factors, including:
• Soil and Water Pressure: The pressure from soil and water above culverts and tunnels can lead to structural damage
• Excessive Traffic Load: In areas with heavy vehicle traffic, the structural load capacity of culverts and tunnels may be strained.
• Aging Over Time: Reinforced concrete and steel culverts naturally wear out over time, losing strength and shortening service life.
• Excessive Backfill Construction: In cases where excessive backfill has been applied above culverts and tunnels, the structure can be reinforced internally without requiring open-cut construction.
• Faster On-Site Construction: For tunnel and culvert rehabilitation systems, on-site work can be completed much faster. Steel plates can be joined using non-standard overlapping methods and secured with nuts and bolts from the inside, completing assembly 8-9 times faster than conventional methods.
