Aohong is a professional manufacturer of Modular Expansion Joints for Bridge, offering precision-engineered solutions for accommodating structural movements in large-span bridges. Modular Expansion Joints are designed to handle multi-directional displacements—longitudinal, transverse, and vertical—making them ideal for bridges with movements from 80 mm to over 2,000 mm. These joints are especially effective for curved, skewed, sloped, and wide bridge structures, including highway overpasses and expressway bridges. Each system consists of edge and center beams, load-bearing support bars, and watertight sealing elements, all managed by a mechanical control system that ensures uniform movement and even spacing. With field-proven durability and high resistance to seismic loads and thermal changes, Modular Expansion Joints provide long-lasting performance and minimal maintenance requirements for modern infrastructure.

Features of Modular Expansion Joints

Independent Load-Bearing & Displacement Systems:
The structure of Modular Expansion Joints separates the load-bearing frame from the displacement control system, ensuring stability under dynamic traffic and environmental conditions.

Equal Spacing Control:
Equipped with a mechanical regulating system, the expansion joint ensures synchronized movement of each center beam to maintain balanced displacement across the structure.

Watertight Sealing System:
The modular joint uses elastomeric box seals or strip seals that create a sealed barrier, preventing water infiltration and protecting the substructure from damage.

Durability & Flexibility:
The multi-beam system supports heavy traffic loads while accommodating ongoing structural movement caused by temperature variation, live loads, and seismic activity.

Modular Joint Types:

• GQF-MZL Modular Expansion Joints – Designed for large movements up to 1,200 mm
• Low-bedding Expansion Joints – GQF-C, GQF-Z, GQF-F, GQF-L types for smaller movements below 80 mm