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Modular expansion joint

2019-5-31 16:27:17  608
The Modular Expansion Joint System is a mechanical device installed in bridge expansion joint openings. Field proven under the toughest bridge conditions everywhere in the world, the Modular joint sys...

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  • description
  • applications

Modular Expansion Joint System is a mechanical device installed in bridge expansion joint openings. Field proven under the toughest bridge conditions everywhere in the world, the Modular joint system is made to order in accordance with the highest fabrication standards and can be engineered to meet a variety of conditions and movement requirements. Modular bridge expansion joints are designed to accommodate large longitudinal expansion and contraction movements of bridge superstructures. In addition to supporting wheel loads, a properly designed modular joint will prevent water and debris from draining onto the underlying superstructure and substructure.



Items

Technical Requests(mm)

Total length tolerance

+5,0

Overall length straightness tolerance

10/10000

The same section top surface altitude difference

≤1

The width deviation of each expansion joint

≤2

Welding quality

No slag inclusion, flaw, burn and other defects.

Appearance quality

Bright, clean and smooth, the paint layer is uniform

Seal rubber belt physical property test

As JT/T4-2004

Seal rubber belt waterproof performance test

24 hours in water no leakage

The maximum horizontal friction resistance when Tensioning and Compressing

<4KN/m





Modular Bridge Expansion Joints are manufactured to match perfectly the structure’s profile, enabling surface water to remain on the deck so that it can be directed toward the drainage systems designed for this purpose.

The primary function of the Modular Expansion Joints is to permit vehicle traffic to travel smoothly across large expansion joint openings. It does this by dividing the large expansion joint openings into a series of smaller openings called cells. These cells work in series to accommodate the necessary thermal bridge movement (expansion and contraction) while providing a smooth riding surface for bridge vehicle traffic. The Modular Expansion Joints is normally used for expansion joints with a movement range exceeding 75 mm.

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