​Bridge Form traveler - Hanging basket

Bridge Form Traveler:

A bridge form traveler is an advanced construction system used for cantilever bridge construction, particularly for segmental bridges. It is designed to support the construction of successive bridge segments without the need for ground-based scaffolding, making it ideal for long spans over rivers, valleys, or other challenging terrains.

The form traveler consists of a steel framework, formwork for casting concrete, and mechanisms for precise positioning and adjustment. It provides stability, safety, and efficiency during construction. After each segment is cast and cured, the form traveler moves forward to the next section, maintaining alignment and structural integrity.

Bridge form travelers are a critical innovation in modern bridge engineering, enabling the construction of durable and aesthetically pleasing bridges in complex environments.

A traveller for bridge construction, also known as a bridge hanging basket, is a crucial piece of equipment in modern bridge construction, especially for the construction of box girder bridges. Here is an introduction to it:

Structure

Main Beam: It is the main load-bearing component of the traveller, usually made of steel or other high-strength materials. It extends along the bridge axis and bears the weight of the concrete box girder and other construction loads.

Hanging System: Composed of hanging rods and other components, the hanging system connects the main beam and the bottom formwork. It adjusts the height and position of the bottom formwork to ensure the accurate construction of the box girder.

Bottom Formwork: It is the platform for concrete pouring, which directly contacts the concrete and forms the bottom surface of the box girder. The bottom formwork needs to have sufficient strength and rigidity to ensure the quality of the concrete surface.

Side Formwork: It is installed on both sides of the bottom formwork and forms the side surface of the box girder together with the bottom formwork. The side formwork is also an important part of the concrete pouring molding process.

Walking System: It is used to move the traveller along the bridge axis. The walking system usually includes wheels, rails and other components, which can realize the smooth movement of the traveller.

Working Principle

Assembly: First, assemble the traveller on the pier or the completed part of the box girder. After the assembly is completed, adjust the position and height of the traveller to make it ready for construction.

Concrete Pouring: Place the steel bars and install the formwork on the traveller. Then pour the concrete into the formwork. During the pouring process, the traveller bears the weight of the concrete and other construction loads.

Moving Forward: After the concrete is poured and cured, loosen the connection between the traveller and the completed box girder part, and then use the walking system to move the traveller forward to the next construction section. Repeat the above steps until the entire bridge is completed.

Advantages

High Construction Efficiency: The traveller can move forward continuously along the bridge axis, realizing the continuous construction of the box girder, which greatly improves the construction efficiency.

Good Quality Control: The traveller provides a stable construction platform, which is conducive to the accurate installation of steel bars and formwork, and the quality control of concrete pouring.

Strong Adaptability: It can be used in the construction of various types of box girder bridges and has strong adaptability to different bridge spans and curves.