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Trusted Global Supplier of High - Performance Bridge Expansion Joints: Ensuring Structural Integrity

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US$ 799 5 - 9 Combos
US$ 699 ≥10 Combos
Key Specifications
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Type:
Telescopic Device
Certification:
AISI
Warranty:
1year
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Hebei KeWang Rubber Products Co., Ltd.
Verified Business License
Payment & Shipping
Payment Methods:
Port of Shipment:
tianjin/qingdao
Delivery Detail:
14 days

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Type Telescopic Device
Certification AISI
Warranty 1year
Position Upper Structure
Function Protect, Support
Transport Package logistics
Specification customized
Trademark KW
Origin Hengshui,China
1. Product Overview
Bridge expansion joints are crucial components in bridge construction. They are designed to meet the deformation requirements of bridge decks, allowing for free expansion and contraction in both parallel and perpendicular directions to the bridge axis. These joints must be robust and reliable, ensuring a smooth and noise - free driving experience for vehicles. Additionally, they play a vital role in preventing the intrusion of rainwater, garbage, and dirt, and are easy to install, inspect, maintain, and clean. At the location of the expansion joint, both the railing and the bridge deck pavement are separated.
2. Function and Significance
2.1 Adjusting for Deformation
The primary function of bridge expansion joints is to regulate the displacement and connection between the upper structures caused by vehicle loads and bridge construction materials. Temperature changes can cause bridge materials to expand when it's hot and contract when it's cold. Concrete shrinkage, vehicle loads, and foundation settlement can also lead to bridge deformation. Without expansion joints, the resulting stress from restricted movement could cause cracks, damage, or even collapse of the bridge structure. Expansion joints provide the necessary space for these deformations, safeguarding the structural integrity of the bridge.
2.2 Enhancing Driving Comfort and Safety
A well - functioning expansion joint ensures that the bridge deck remains smooth during deformation. This significantly reduces the jolts and impacts that vehicles would otherwise experience while crossing the bridge. By minimizing the bumps, expansion joints enhance the driving comfort for passengers and reduce the wear and tear on vehicles. Moreover, a smooth ride also contributes to safer driving conditions, as sudden jolts can potentially cause drivers to lose control, especially at high speeds.
2.3 Mitigating Stress Concentration
When bridge components bear various loads, stress concentration often occurs. Expansion joints, by allowing controlled displacement, effectively disperse or release these concentrated stresses. This results in a more even distribution of forces across the bridge components, thereby extending the lifespan of the bridge structure.
2.4 Waterproofing and Debris Prevention
Bridge expansion joints are designed to prevent rainwater, garbage, and dirt from seeping into the bridge gaps. This is crucial as water can corrode the bridge's internal structure, especially the steel reinforcement in concrete bridges. Rusty steel weakens the concrete, reducing the overall strength and durability of the bridge. By keeping out debris, expansion joints also prevent blockages that could impede the proper functioning of the joint or cause additional stress on the bridge.
3. Working Principle
Bridge expansion joints are typically made from steel, rubber, or other elastic materials. The core principle involves installing a flexible and adjustable device between the two ends of the bridge. This device can expand or contract as the bridge undergoes deformation due to various factors such as temperature changes, vehicle loads, etc.
3.1 Small - displacement Joints (Up to 45 mm)

  • Sliding Plate Joints: These joints are often constructed in a sandwich - like structure with an upper and a lower slide plate. They are simple in design and cost - effective, making them suitable for short and medium - span bridges. The sliding action between the plates allows for small - scale movement.

  • Compression Seal Joints: These seals are adaptable, relatively inexpensive, and easy to replace. They work by compressing or expanding in response to the bridge's movement, maintaining a seal to prevent water and debris ingress.

  • Asphaltic Plug Joints: Filled with asphalt material, these joints provide a smooth roadway surface for traffic. They offer good resistance against water and snow and prevent debris from accumulating at the joint surface.

  • Poured Sealant Joints: These joints are easy to install and self - leveling. They can be set up quickly, making them ideal for rehabilitation or repair projects. They also exhibit good elastic properties over a wide temperature range.

3.2 Medium - displacement Joints (45 - 130 mm)

  • Strip Seal Joints: Composed of elastomeric glands mechanically trapped between two steel edge members, strip seal joints form an excellent watertight sealing system. They are designed to handle high - volume vehicular traffic and can accommodate movements within the 45 - 130 mm range.

  • Finger Plate Joints: These joints can accommodate both horizontal and vertical movements of the bridge structure. They are suitable for medium - to - long - span bridges, operate silently, and are free from skidding and vibration issues. They also allow for easy inspection, maintenance, repair, or replacement.

3.3 Large - displacement Joints (Over 130 mm)

  • Bolt - down Panel Joints: These joints are fabricated in different widths according to the overall allowable movement range. They provide a secure connection and can withstand large - scale displacements.

  • Modular Elastomeric Seal Joints: These joints offer water - resistance and can transfer vehicular loads across extensive expansion joint openings. They are highly effective in handling large - displacement requirements in bridges.

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Product Tags: Bridge Expansion Joint , Waterproofing Check for Bridge Expansion Joints , Durable Bridge Expansion Joints

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Hebei KeWang Rubber Products Co., Ltd.
Verified Business License
Year Established
2014
Annual Export Value
US$1 Million - US$1.5 Million
Total Employees
11 - 50 People
Product Certifications
QS9000, ISO9001
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