Main Types and Characteristics
Bailey bridge panels are mainly divided into two technical schools, the differences of which are crucial:
1. Orthotropic Steel Bridge panel (Modern Standard Type)
Structure: Constructed of steel plates with longitudinal U-shaped or trapezoidal stiffeners, achieving "plate-rib integration".
Key Attributes:
High Strength and Lightweight: High inherent rigidity and high load-bearing efficiency.
Quick Installation: Standard size (e.g., 3m × 1.5m), with bolt holes at the edges for rapid assembly.
Main Form: Often "galvanized U-shaped steel panel," hot-dip galvanized for corrosion resistance and durability.
Load Capacity: Available in different specifications, such as "Type 200," which typically refers to a reinforced model with a load-bearing capacity of approximately 20 tons.
2. Wheel Track Slab (Early/Simple Type)
Structure: Two simple flat steel plates, covering only the wheel tracks.
Key Attributes:
Single Function: Only serves as a driving surface; a supporting beam, such as a wooden plank, is required underneath for load distribution.
Slower Installation: Requires integrated construction; overall integrity is slightly lower.
Lower Load Capacity: Suitable for light-duty temporary access roads.
Core Functions
- Bear Vehicle Load: Transfers wheel loads to the crossbeams and trusses.
- Provides Driving Surface: Creates a smooth, non-slip driving lane.
- Laterally Distributes Load: Distributes concentrated loads to multiple crossbeams.
- Auxiliary Structural Role: Part of the bridge panel participates in structural stress, improving overall rigidity.
Applicable Scenarios
- Military Emergency: Rapid passage for heavy equipment.
- Disaster Relief: Opens lifelines for rescue vehicles.
- Construction Temporary Bridge: Withstands frequent traffic from concrete trucks, dump trucks, etc.
- Maintenance Bridge: Replaces permanent bridges under maintenance.
- Semi-Permanent Facilities: Heavy transport routes in mining areas, forest areas, etc.
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