Finger Expansion Joint

◆◆ Finger-Type Expansion Joint

The Finger-Type Expansion Joint is composed of comb-tooth steel plates, stainless steel sliding plates, neoprene rubber plates, anchor bolts, and other components.

Main Characteristics of Comb-Tooth Type Bridge Expansion Joint：

1.Low structural height and wide application range

2.Smooth driving experience

3.Excellent waterproof performance

4.Automatic slag removal

5.Anti-slip property

◆◆ Main Application Scenarios of Finger Expansion Joints

Bridge Engineering:

1.1 Highway Bridges: In highway bridges, finger expansion joints are widely used at the joints of bridge decks to adapt to the expansion and contraction deformation of bridges caused by temperature changes, vehicle loads, and other factors. This design can effectively prevent bridge deck cracking and ensure driving safety and comfort.

1.2 Railway Bridges: Railway bridges also need to be equipped with expansion joints to adapt to the expansion and contraction deformation caused by train loads and temperature changes. The application of finger expansion joints in railway bridges can ensure the smoothness of the track and the safety of train operation.

Expressways:

2.1 Pavement Joints: At the pavement joints of expressways, finger expansion joints can effectively alleviate pavement expansion and contraction caused by temperature changes, prevent pavement cracking and damage, and extend the service life of the pavement.

Large-Scale Buildings:

3.1 Wall Expansion Joints: In large-scale buildings, finger expansion joints can be used at the joints of walls to adapt to the expansion and contraction deformation of walls caused by temperature changes, humidity changes, and other factors, preventing wall cracking and damage.

3.2 Floor Slab Expansion Joints: In multi-storey or high-rise buildings, finger expansion joints can be used at the joints of floor slabs to adapt to the expansion and contraction deformation of floor slabs caused by temperature changes, humidity changes, and other factors, ensuring the overall stability and safety of the building.

Tunnel Engineering:

4.1 Tunnel Linings: In tunnel engineering, finger expansion joints can be used at the joints of tunnel linings to adapt to the expansion and contraction deformation of tunnels caused by temperature changes, humidity changes, and other factors, preventing lining cracking and damage, and ensuring the structural safety and service function of the tunnel.

◆◆ Installation Method of Finger Expansion Joints

The installation method of finger expansion joints is similar to that of other types of expansion joints, and usually includes the following steps:

Preparation Work: Before installing the expansion joint, it is necessary to clean the reserved groove to ensure that debris, dust, and other impurities in the groove are completely removed. At the same time, check whether the width, depth of the groove, and the pre-embedded steel bars meet the requirements for installing the expansion joint.

Formwork Installation: Install the formwork for the expansion joint in the groove. The formwork shall be customized according to the size and shape of the expansion joint to ensure the accuracy of the expansion joint installation.

Concrete Pouring: After the formwork installation is completed, pour concrete into the groove. The strength grade of the concrete shall comply with the design requirements. During the pouring process, the concrete shall be fully vibrated to ensure its compactness.

Expansion Joint Installation: When the concrete reaches a certain strength, install the expansion joint in the groove. The size and shape of the expansion joint shall match the groove. During the installation process, attention shall be paid to keeping the expansion joint flat and vertical.

Expansion Joint Fixing: After the expansion joint is installed, it is necessary to fix it in the groove with bolts or other fixing devices to ensure that the expansion joint can work normally during the shrinkage and expansion of the concrete.

Inspection and Acceptance: After the installation of the expansion joint is completed, it is necessary to inspect and accept the installation quality to ensure that the size, shape, and installation position of the expansion joint meet the design requirements.

The above steps are general guidelines. The specific installation method may vary due to different engineering requirements and designs. In actual operation, the installation shall be carried out in accordance with specific conditions and relevant specifications.

1. What are your main products？

Our main products include:  Anti-Seismic Flexible Pipelines ；Bridge Bearings；Bridge Expansion Joints ；Sealants ； Waterstops

2. Can you provide customized products?

Absolutely! We offer tailored solutions based on your project’s specific requirements, covering everything from material selection (such as NBR, EPDM, and more) to structural design. All custom orders come with detailed technical drawings and professional installation guides to ensure seamless implementation.

3.What certifications does your company possess?

We hold ISO certifications for quality, environmental, and occupational health management systems, ensuring strict compliance with GB/T 17955-2019 and other national standards.

4.Do you offer installation support?

Yes, we provide after-sales support, including remote video guidance for installation.