What are the main applications of comb plate expansion device
The comb plate expansion device is a steel supported structure with core advantages such as strong bearing capacity, smooth driving, multi-directional displacement, and convenient installation and maintenance. It can adapt to the expansion and contraction requirements of 80-1000mm and is widely used in transportation infrastructure fields such as highways, municipal engineering, and railways. The
The comb plate expansion device is a steel supported structure with core advantages such as strong bearing capacity, smooth driving, multi-directional displacement, and convenient installation and maintenance. It can adapt to the expansion and contraction requirements of 80-1000mm and is widely used in transportation infrastructure fields such as highways, municipal engineering, and railways. The core application scope is as follows:
1、 Bridge Engineering (Core Application Field)
1. According to bridge span and structural type
Medium and small span bridges: simply supported beam bridges, continuous beam bridges, slab bridges, arch bridges (spans 20-50m), suitable for conventional temperature expansion and load deformation.
Long span bridges: cable-stayed bridges, suspension bridges, and large continuous beam bridges. A single group can meet the expansion and contraction of 500-1000mm, and multiple group combination designs can be used for ultra large displacements.
Irregular bridges: curved bridges, oblique bridges, wide bridges, with multi-directional displacement capabilities to adapt to complex linear and displacement requirements.
Steel and concrete bridges: Steel structures have strong adaptability and are widely used in concrete beam bridges, especially for the replacement of expansion devices in old bridges.
2. According to traffic level and load conditions
High grade highway bridges: expressways, first-class highway, urban expressways, and viaducts to meet the requirements of high-speed traffic smoothness and noise reduction.
Heavy duty transportation bridges: mining areas, ports, freight dedicated lines, railway bridges (including high-speed railways), high-strength steel can withstand large axle loads and high-frequency impacts, with excellent fatigue resistance.
Urban main road bridges: road sections with high traffic volume and high requirements for driving comfort, reducing vehicle impact and bridge deck damage.
3. According to special environmental conditions
Bridges in high-altitude regions: Suitable for temperatures below -30 ℃, using cold resistant sealing strips to avoid expansion and contraction obstruction caused by ice and snow accumulation.
Coastal/salt spray environment bridges: stainless steel comb teeth or hot-dip galvanized/anti-corrosion spray treatment are selected to adapt to high humidity and high salt spray corrosion environments.
Mountainous/large longitudinal slope bridges: The comb tooth overlap structure has strong stability, good drainage performance, and is suitable for large longitudinal slopes and complex terrain.
2、 Other transportation and municipal engineering
Urban rail transit: Expansion joints in elevated sections of subways and light rails, adapted to high-frequency loads and structural deformations of trains.
Large interchange: ramps, overpasses, meeting the needs of multi-directional displacement and smooth driving.
Tunnel entrance and subgrade connection section: solve the differential settlement and expansion problems between the subgrade and the bridge/tunnel.
Water conservancy/port engineering: Large scale aqueducts, ship locks, and dock structures that adapt to displacement caused by temperature and load.
3、 Applicable scenario core boundary
Expansion range: single group cantilever 60-240mm, simple support 80-1000mm, combination up to 2000mm+.
Priority scenario: Projects with high requirements for driving comfort, load-bearing capacity, multi-directional displacement, and maintenance convenience.
Restricted scenarios: Long term water accumulation and strong corrosive environments require strengthened anti-corrosion and sealing maintenance; Priority is given to modular or combination schemes for ultra large displacements (>1000mm).
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