Bridge Expansion Joint
Single Strip Seal Expansion Joint (Strip Seal Expansion Joints) for movements of up to 80 mm are expansion joints made of a single set of structural steel, rubber sealing strips and headed studs. In order to meet the requirements of the bridge deformation, strip seal expansion joints are usually set at each end of the bridge, between ends of the beam and abutment or on the hinge joints of the bridge. They are applied with rubber noise weaken board which can help to increase movement and reduce noise from over-passing traffic by up to 80%.
Specification
- Rubber material: chloroprene rubber (CR) or natural rubber (NR).
- Head Type: Straight or bending.
Compression Seal Expansion Joint consists of steel armored nosing at two edges of the expansion joint gap suitably anchored to the deck concrete and a performed chloroprene elastomer compressed and fixed into the joint gap with special adhesive girder. It is recommended for simply supported or continuous spans right or skew moderately curved with maximum horizontal movement not exceeding 40mm. In order to meet excellent quality standards, we are supplying Compression Seal Expansion Joint.
Modular Joint(Modular expansion joints) are composed by boundary beams, middle beams, cross girders, displacement control systems, bridge bearings, anchoring components and rubber sealing belts. modular expansion joints are suitable for longitudinal movements of 80 mm to 1200 mm.
Having good bearing capacity and stability, modular expansion joints can accommodate movements in every direction and rotations about every axis. Their individual displacement control and load transfer systems enable bridges to adapt the movement of the beam caused by temperature and ensure the traffic safety.
Finger Type Expansion Joint(Finger expansion joints) are designed to handle movements of 80 mm to 1,200 mm are composed by steel finger plates, CR sheet, anchor bolts and other components. The rubber sheet is placed on the retractable steel, and anchor bolts help to fix the whole structure. The orientation of the fingers is in the direction of vehicle travel, which can reduce noise and improve driver’s comfort. There is a drainage channel which allows rainwater to enter the bridge’s drainage system, hanging beneath the joint.
Application
Finger expansion joints are suitable for both new bridges and existing bridges. They are also good choices for the large-span bridges and do well in replacing the old ones. Finger expansion joints are widely used among steel box girders, among concrete beams, and between steel box girders and concrete beams. Finger expansion joints also can be used in expressway.