Shallow buried type Finger expansion joint

Finger expansion joint is a type of mechanical device that is used to allow for movement and expansion in a structure. 

Finger expansion joint for bridge can accommodate large amounts of movement. This is achieved through the use of a series of metal fingers, which are connected by flexible hinges. These fingers allow the joint to expand and contract as needed, while still maintaining its structural integrity.

Finger expansion joint can absorb shock and vibration. This is important in structures that are subject to heavy loads or frequent use, as it helps to reduce wear and tear on the structure. The designed expansion capacity of the shallow buried expansion device is 0-180mm. Its structural feature is that the upper part is comb shaped steel plate and the lower part is anisotropic steel.

Expansion joints are connecting elements between decks or between decks and abutments, which have the ability to withstand vertical and horizontal actions, allow free movement without significant resistance, and ensure the safety of traffic passages.

Finger expansion Joints serve other functions in addition to imparting continuity to the pavement and allowing deformation of the connected structural components:

• Water proof

• Corrosion resistance

• Minimal noise and vibration

• Ensuring maximum tire grip for safety

• Minimizes vibrations for ultimate passenger comfort

• Provide different mechanical anchoring solutions to meet customer requirements.

• Modular joint production for simple and cost-effective installation, inspection and maintenance

The designed expansion capacity of the finger expansion joint for bridge is 0-180mm. Its structural feature is that the upper part is comb shaped steel plate and the lower part is anisotropic steel. It combines the advantages of comb plate expansion device and modular expansion device. It is especially suitable for small and medium-sized bridges with limited reserved installation slots and the reconstruction of old bridges. The utility model has the advantages of simple structure, firmness and durability, stable driving, and is suitable for small and medium-sized bridges.

Expansion joints are suitable for bridge decks with asphalt or concrete surfaces and can be installed on almost all types of new or existing bridges. Due to their limited structural depth and quick installation, they are of great advantage when used to replace existing joints during restoration works. If you are looking for wholesale finger expansion joints from trusted supplier, welcome to contact us for detailed information!

When installing the shallow buried comb plate expansion device, the top surface must be straight.

When pouring concrete, ensure that the lower part of the comb shaped steel plate is vibrated and compacted to prevent void. According to the length of comb plate, it is divided into four types: 120，140，160，180