Form traveller

A form traveller (also known as a "formwork traveler" or "travelling formwork") is a specialized construction system used in the construction of bridges, tunnels, and other structures where repetitive segments are required. It provides a movable platform or scaffolding that supports the formwork used to cast concrete segments in place. These systems are designed for efficiency, safety, and precision in segmental construction.

Key Features of a Form Traveller

Modular Design: Typically lightweight and adaptable to various geometries, allowing for adjustments to different span shapes and sizes.

Self-Supporting: Designed to carry its own weight, along with the weight of wet concrete, reinforcement, and live loads, without additional ground-based support.

Reusability: Designed for repeated use across multiple spans, making it cost-effective for long projects.

Mobility: Equipped with mechanisms for moving forward after a segment is cast and cured, ready to begin the next section.

Applications

Segmental Bridge Construction: Frequently used for cantilever bridge construction where spans are cast one segment at a time.

Tunnels: In cases like cut-and-cover tunnels, form travellers provide efficient casting of repetitive sections.

Other Large Structures: Wherever sequential casting of concrete is required in elevated or challenging locations.

Advantages

Reduces the need for extensive ground-based scaffolding.

Enables construction in areas where access is limited (e.g., over water or deep valleys).

Promotes precision in alignment and geometry.