Full span bridge formwork

Full-span bridge formwork refers to a construction method used to build bridges by creating the entire span of the bridge at once, rather than constructing it segment by segment. This technique is commonly used for long spans, where traditional methods may be less efficient or feasible. Here's an overview of how full-span bridge formwork works:

Components of Full-Span Bridge Formwork

Formwork System:

Custom-designed molds that support the concrete while it cures.

Typically made of steel or aluminum for strength and durability.

Includes pre-assembled segments for easy installation.

Supporting Structures:

Scaffolding or temporary supports are erected to hold the formwork in place.

May use a gantry system that spans the length of the bridge and moves as construction progresses.

Concrete Placement:

High-strength concrete is poured into the formwork in a single operation.

Concrete is often pumped or poured using advanced techniques to ensure uniformity.

Reinforcement:

Steel rebar or post-tension cables are integrated into the formwork to provide tensile strength.

Gantry System:

A traveling gantry or launching girder is used to support and move the formwork.

Ensures precision alignment and reduces the need for extensive ground support.

Advantages

Speed:

Allows rapid construction of entire spans, reducing project timelines.

Precision:

Ensures high accuracy and uniformity across spans.

Reduced Labor:

Less manual intervention due to prefabricated components and mechanized systems.

Safety:

Minimizes risks by reducing the need for workers to operate at height.

Applications

Long-span bridges with challenging site conditions (e.g., deep valleys, rivers, highways).

Urban environments where minimizing disruption to traffic or activities below the bridge is critical.

Rail and road bridges requiring high-speed construction methods.