What are the advantages of the axial multi-directional displacement comb plate expansion device
The core advantages of the shaft type multi-directional displacement comb plate expansion device are concentrated in six aspects: multi-dimensional displacement adaptation, smooth driving, high load-bearing durability, waterproof self-cleaning slag, shallow burial and easy construction, and good seismic resistance. It is particularly suitable for large-span, curved, wide and high-grade highway bri
The core advantages of the shaft type multi-directional displacement comb plate expansion device are concentrated in six aspects: multi-dimensional displacement adaptation, smooth driving, high load-bearing durability, waterproof self-cleaning slag, shallow burial and easy construction, and good seismic resistance. It is particularly suitable for large-span, curved, wide and high-grade highway bridges.
1、 Strong adaptability to multidimensional displacement (core advantage)
Three dimensional displacement+angle full adaptation: Through steel pivot hinges, it synchronously absorbs longitudinal expansion and contraction (up to 420mm), lateral displacement, vertical angle, and torsional displacement, solving the limitation of traditional expansion joints that can only deform unidirectionally.
Worry free in complex working conditions: adaptable to temperature differences, wind loads, vehicle bias loads, and multi-directional spatial deformations caused by earthquakes, especially suitable for the renovation of curved bridges, inclined bridges, wide bridges, and old bridges.
Vertical misalignment compatibility: The pivot allows for a slight height difference at the beam end, avoiding hard top jamming or detachment, and protecting the concrete at the beam end.
2、 Smooth and comfortable driving, noise reduction and impact resistance
No jumping and low noise: The comb teeth are densely crossed, and the wheels pass through without obvious clearance impact; The contact surface is equipped with rubber pads and lubrication, significantly reducing driving vibration and noise.
Anti fatigue and anti heavy load: The overall high-strength steel plate and hinge shaft have high rigidity and impact resistance, making it less likely to loosen or crack under heavy and high-frequency traffic.
Strong continuity of the bridge deck: The top surface of the comb teeth is flush with the bridge deck, eliminating the "step feeling" of expansion joints and improving driving safety and comfort.
3、 High load-bearing capacity, durability, and extended bridge lifespan
Uniform load transmission: The comb plate disperses the wheel load to the beam end, avoiding local stress concentration and reducing beam end damage.
Material anti-corrosion and wear-resistant: The comb teeth are made of high-strength alloy steel/stainless steel, and the shaft is quenched and tempered. Combined with multi-layer anti-corrosion coating, it is rust resistant, wear-resistant, and has a long service life.
Bolt anti loosening design: The shaft and elastic fastening components prevent bolt loosening caused by vehicle impact and reduce maintenance frequency.
4、 Waterproof and dustproof+automatic slag cleaning, low maintenance
Reliable waterproof sealing: equipped with chloroprene rubber waterproof layer and expansion joint waterproof grease to block rainwater and snow melting agent infiltration, protecting steel bars and supports.
Automatic slag discharge and self-cleaning: The comb teeth gap is located on the side of the beam end, and a stainless steel sliding plate is installed at the bottom; The vehicle automatically discharges debris during driving and telescopic movement, making it less likely to get stuck and reducing manual cleaning.
5、 Shallow buried type, convenient for construction and maintenance
Small installation height: It belongs to shallow buried structure and does not require deep reserved grooves. It can be installed within the bridge deck pavement layer, suitable for new and old bridges. The replacement of old bridges does not require large-scale chiseling.
Short construction period: Prefabrication of components in the factory, on-site bolt fixation, fast installation, high precision, significantly reducing the construction period.
Easy to maintain: modular components, locally damaged parts can be replaced separately without the need for overall disassembly, resulting in low maintenance costs.
6、 Excellent seismic performance, suitable for high-intensity zones
Multi directional deformation energy dissipation: During earthquakes, it can freely follow the swinging of the beam, absorb multi-dimensional seismic displacement, and avoid tearing of the expansion device or damage from beam end impact.
Seismic buffering design: shaft+elastic support system, enhances overall seismic energy dissipation capacity, suitable for bridges in strong earthquake zones.
7、 Wide applicability
Can be used for concrete beams, steel box beams, hybrid beams, curved bridges, inclined bridges, elevated roads, municipal bridges, highway bridges, especially suitable for large displacement (200-420mm) scenarios.
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