Expansion Joint

1. Function

Used to absorb the displacement of the structure caused by temperature changes, concrete shrinkage, earthquakes or loads to prevent cracking or damage.

2. Application scenarios

1) Building structures: walls, floors, roofs, etc. (such as high-rise buildings, bridges).

2) Roads/bridges: pavement expansion joints (to avoid cracks caused by thermal expansion and contraction)

3) Underground projects: tunnels, basements (to adapt to foundation settlement).

3. Types

1) Rubber sheet expansion joints: composed of rubber sheets (often reinforced with steel plates), using the elastic deformation of rubber to adapt to the displacement of the beam ends.

2) Modular expansion joints: composed of multiple groups of special-shaped steel beams and rubber sealing strips, and large displacement adjustment is achieved through modular design.

3) Comb plate expansion joint: using interlocking metal comb plates (single or double joints) to allow longitudinal displacement while providing a continuous driving surface.

4) TST seamless expansion joint: mainly made of elastic material, filling the joint area to form a continuous road surface.