What are the applications of special bearings for highway bridges in complex terrain areas
The following are some applications of special bearings for highway bridges in complex terrain areas:
1. Raise the bowl shaped support
Mountainous highway bridges: The terrain in mountainous areas is undulating, and during bridge construction, the use of adjustable basin type supports can correctly adjust the elevation of the beam body, ensuring smooth bridge alignment and meeting design
The following are some applications of special bearings for highway bridges in complex terrain areas:
1. Raise the bowl shaped support
Mountainous highway bridges: The terrain in mountainous areas is undulating, and during bridge construction, the use of adjustable basin type supports can correctly adjust the elevation of the beam body, ensuring smooth bridge alignment and meeting design requirements. During the operation phase, it can also cope with changes in beam height caused by factors such as foundation settlement.
Cross valley bridge: The terrain of the valley results in significant differences in the height of the foundation of each pier and abutment of the bridge. The raised bowl shaped support facilitates adjusting the height of the beam according to the actual terrain during construction, adapting to the terrain changes of the valley and ensuring the stability of the bridge structure.
Cross sea Bridge: The marine environment is complex, and the foundation is susceptible to uneven settlement caused by wave erosion. By adjusting the height of the bowl shaped support, the beam height can be adjusted in real time to ensure the safety of the bridge structure and extend its service life.
2. QGZ spherical steel support
Long span bridges: widely used in large-span highway bridges that span complex terrains such as wide rivers and canyons, such as suspension bridges and cable-stayed bridges. Compared with bearings with the same bearing capacity, QGZ spherical steel bearings are smaller in size and lighter in weight. The upper and lower parts transmit force through spherical surfaces, and the force is evenly distributed and can rotate in a universal manner, which can adapt to the complex deformation requirements of large-span bridges under various loads.
Curved and Wide Bridges: For curved and wide bridges commonly found in complex terrains such as mountainous areas, QGZ spherical steel supports can rotate flexibly and without directionality, which can better adapt to the deformation of the bridge in both plane and space, ensuring the reasonable stress distribution of the bridge structure.
3. Shock absorbing spherical steel support
Bridges in earthquake prone areas: In complex terrain areas such as mountainous areas with frequent seismic activity, shock-absorbing spherical steel bearings can withstand earthquakes of 8-11 degrees and effectively reduce the amplification factor of seismic forces. When an earthquake occurs, both rigid seismic measures and flexible vibration reduction measures act simultaneously to ensure reasonable relative displacement between the upper and lower structures of the bridge, maintaining structural unity.
Large span bridges in high-intensity earthquake areas: Large span highway bridges built in high-intensity earthquake areas, such as bridges crossing active fault zones, have significantly improved horizontal bearing capacity, vertical pull-out force, and overall strength of shock-absorbing spherical steel bearings compared to ordinary bearings, which can withstand huge earthquake input energy.
4. Self adjustable high pot rubber bearing
Bridges under complex geological conditions: In complex geological areas such as soft soil foundations and collapsible loess, the problem of foundation settlement is particularly prominent. The self-adjusting bowl type rubber support can lift the beam body by injecting hydraulic oil through an oil pump, correctly controlling the height adjustment amount, and timely adjusting the elevation changes of the beam body caused by foundation settlement.
Existing bridge renovation area: When renovating, reinforcing, or repairing existing highway bridges in complex terrain areas, if the beam body is found to have settlement, deformation, or other reasons that cause changes in the bridge deck elevation, the self-adjusting bowl type rubber bearings can be easily adjusted to restore the normal elevation of the bridge deck.
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