Finger Expansion Joint Specifications
| Material: | Stainless Steel,Rubber |
|---|---|
| Process: | Galvanize |
| Alloy Or Not: | Non-Alloy |
| Movement: | 50-2400mm |
| Type: | Finger Comb |
| Usage: | Bridge, Road |
| Certificate: | ISO9001:2008 |
| Packing: | Pallet, Wooden box |
What is Finger Expansion Joint
Finger type bridge expansion joints are suitable for use under heavy traffic, and mainly applied to the device with 20-320mm expansion. Their special doweled connection system makes them particularly useful where the impact on the main structure should be minimised. The system is designed on a modular basis, allowing individual finger plates to be quickly replaced as required. Finger type joints are still specified on many bridge projects due to proven long-term structural performance. These joint systems are also convenient to install on bridge rehabilitation projects requiring a shallow joint depth and/or staged construction.
Edge steel, grade Q235 or Q345.
Finger plates, grade Q345.
Drainage channel, EPDM, PVC or stainless steel, depending on customer preference.
Types of Finger Expansion Joint
- Notes
- Installation Method
The rubber is made of chloroprene rubber (CR, suitable for temperatures between -25℃ and +60℃) or natural rubber (NR, suitable for temperatures between -40℃ and +60℃).
The steel plate used in the expansion device must meet the requirements of GB012 and GB374. The bridge expansion device is made of integral hot-rolled 16Mn special-shaped steel.
Shallow buried comb plate expansion joints
Due to the limitation of transportation length, the shallow buried comb plate expansion joints can be manufactured in sections and spliced on site. The expansion joints stored on the construction site should be placed in parallel and not cross-stacked to prevent deformation.
When leaving the factory, the connection fixtures are only designed for transportation convenience, and the gap is not a fixed position; when installing the shallow buried comb plate expansion joints, it needs to be approved by the supervision engineer. If there are regulations in the design documents, follow the regulations in the bridge design documents and do not change them at will.
1. Locate and cut asphalt concrete, and loft according to the width. Note that it is asymmetrically cut along the center line of the beam joint on the left and right. Keep the size in mind and don’t make mistakes.
2. When excavating, it is necessary to clean up the debris, and the excavation depth should at least reach the value, and do not exceed the requirements.
3. Positioning with fixed bolts
Use the bolt hole combination template to lay out and position, and the screw position error is 1mm; when drilling holes, the structure inside the beam body, such as prestressed pipes, steel bars, etc., shall not be involved.
4. Tie the transition bottom steel grid, set up the template, and pour C40 steel fiber concrete; the top surface elevation and flatness must be strictly controlled, consistent with the longitudinal and mold slopes of the bridge deck, and its flatness should be 0-1mm (mm).
5. Tie the distribution steel bars in the transition section.
6. Pour C40 steel fiber concrete in the transition section.
7. Install the waterproof neoprene sheet, stainless steel plate and toothed plate, and tighten them with nuts; to prevent the screw and nut from loosening, anti-loosening glue must be applied to the thread, and the screw and nut surface must be fixed with a small amount of spot welding, and finally the screw hole is filled with waterproof and anti-loosening epoxy resin.
8. Concrete watering and curing, anti-freezing and moisturizing curing in winter.
9. Waterproof paste is poured into the toothed joint
Generally speaking, the expansion joint of the bridge is required to be able to expand and contract freely in both directions parallel and perpendicular to the axis of the bridge, firm and reliable, and the vehicle should be smooth, without sudden jumps and noise when passing by; it should be able to prevent rainwater and garbage soil from infiltrating and blocking; installation, inspection, maintenance, and removal of dirt should be simple and convenient.
Finger Expansion Joint Advanced Manufacturer Line
Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customer satisfaction
Features of Finger Expansion Joint
* Simple structure & low height.
* Minimize noise and vibration.
* Maximize vehicle’s driving smoothness.
* Anti-skidding.
* Be highly water-resistant (Equipped with waterproof device ).
* Low cost & high cost effectiveness.
* Widespread use.
* Easy to install.
Application of Finger Expansion Joint
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.
Hengshui Lu Chen New Material Technology Co., LTD.
We are a professional manufacturer and exporter that is concerned with the design, development and production of Finger Expansion Joint.
All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world
The finger expansion joint plate is an important component used in bridge construction, which is mainly composed of comb plate, stainless steel slide, rubber waterproof layer and high strength anchor bolt. The design of this expansion joint allows the bridge to expand freely under the action of temperature changes or other external forces, while maintaining the flatness of the bridge deck and the comfort of driving
1、High structural stiffness
2、Low building height
3、wide range of application
4、Easy to install and transport
5、Lower cost
1、preparatory work
2、Positioning and fixing
3、Installation and adjustment
4、pouring of concrete
5、Maintenance and caulking
1、Large expansion
2、waterproof and dustproof
3、Automatic slag cleaning