What is the application of the JQZ series ball bearings in the subway
The JQZ series spherical bearings are universal bridge bearing products developed based on national transportation industry standards. They have core advantages such as strong bearing capacity, flexible rotation, good displacement adaptability, and durability stability. They also have the functions of ordinary support, seismic resistance, and horizontal resistance. They are the core load-bearing c
The JQZ series spherical bearings are universal bridge bearing products developed based on national transportation industry standards. They have core advantages such as strong bearing capacity, flexible rotation, good displacement adaptability, and durability stability. They also have the functions of ordinary support, seismic resistance, and horizontal resistance. They are the core load-bearing components of urban rail transit elevated sections. This series of supports can adapt to the engineering characteristics of heavy load, high-frequency vibration, complex linearity, and long-term service of subway elevated bridges. It efficiently undertakes the load of the upper beam, buffers the impact of train operation, adapts to structural deformation and displacement, and comprehensively guarantees the smooth operation, structural safety, and long-term service life of subway lines. It is widely used in various types of rail transit elevated structure projects such as subway elevated section beams, station ancillary bridges, and special curved ramp bridge sections.
1、 Core application scenarios
1. Subway elevated section bridge
As the core supporting component of the elevated subway line, the JQZ series spherical bearings are arranged between the beam and the lower pier, undertaking vertical load-bearing, horizontal force transmission, and structural deformation adaptation functions. According to the design requirements of the bridge, three types of supports can be selected: fixed type, one-way movable type, and two-way movable type, which respectively meet the displacement constraints and rotation requirements of the beam body in straight sections, curved sections, and ramp sections. They can reliably withstand the vertical static load, dynamic load, and lateral impact force generated by train operation, ensure uniform force distribution and stable posture of the elevated beam body, eliminate abnormal displacement and shaking problems of the beam body during train passage, and maintain the smoothness of the line.
2. Elevated ancillary structures of subway stations
Suitable for ancillary projects such as entrance and exit corridors, platform overhanging structures, and track beam support structures of elevated subway stations, meeting the support requirements of large-span and irregular structures. Relying on the advantage of spherical universal rotation, it matches the complex turning angles and force characteristics of the station's ancillary structure, while resisting the continuous vibration caused by train traffic, ensuring stable connection between the ancillary structure and the main project, reasonable force distribution, and improving the overall structural safety.
3. Special Line Elevated Bridge Section of Subway
For special linear bridge sections such as curved bridges, sloping bridges, and inclined bridges in subway lines, the JQZ series spherical bearings can flexibly adapt to multi-directional angle and displacement requirements, solving the engineering pain points of conventional bearings being difficult to adapt to complex linear and uneven stress. At the same time, it has excellent anti torsion and anti eccentric load capabilities, ensuring balanced stress on the beams in curved and ramp sections, and meeting the high-precision linearity and smooth operation requirements of subway lines.
4. Seismic fortification section subway elevated project
The corresponding seismic resistant JQZ support can meet the seismic fortification requirements of subway elevated structures in high-intensity earthquake areas, with stronger horizontal bearing capacity and impact resistance. It can effectively consume earthquake energy, limit abnormal displacement of beams, avoid beam detachment and structural collapse under earthquake conditions, enhance the seismic and disaster prevention capabilities of subway engineering, and ensure the structural integrity of the line after disasters.
2、 Core advantages of product adaptation to subway engineering
The vertical bearing capacity of this series of supports covers a wide range and can meet the heavy load bearing requirements of various span beams of subway elevated structures; The spherical rotating structure is flexible and smooth, and can adapt to temperature changes, train vibrations, and structural angles and displacements caused by load deformation; Adopting wear-resistant and corrosion-resistant materials, without the disadvantages of rubber pressure and aging, resistant to high and low temperatures, vibration fatigue, suitable for all-weather, high-frequency, and long-term operation of subways, with low maintenance and long service life in the later stage; The overall structure is compact and easy to install, suitable for standardized construction of subway projects, effectively improving construction efficiency and reducing project operation and maintenance costs.
3、 Engineering application value
The JQZ series spherical bearings ensure the safety of subway elevated bridge structures, optimize the smoothness of train operation, reduce the frequency of line operation and maintenance, and help subway projects achieve safe, stable, and long-term operation through stable force support, reliable displacement adaptation, and long-term structural protection. They are standardized bearing products with strong universality, high cost-effectiveness, and excellent adaptability in urban subway elevated rail transit engineering.
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