Track bed, construction method thereof, and high polymer vibration isolation bearing replacement method

Abstract

The invention discloses a track bed, a construction method thereof, and a high polymer vibration isolation bearing replacement method. The track bed comprises a base and further comprises a plurality of floating track bed slabs sequentially arrayed in a line direction, high polymer vibration isolation bearings mounted between the base and the floating track bed slab and arrayed on the two sides of access holes of the floating track bed slabs respectively, and a track panel laid on the floating track bed slabs, wherein the access holes are rectangular and formed in the middles of the floating track bed slabs; the sizes of the access holes are greater than those of the high polymer vibration isolation bearings pressed on the two sides of the access holes respectively; and the track panel comprises two columns of sleepers arrayed on the two sides of the access holes respectively, and a pair of steel rails fixed on the two columns of sleepers respectively. According to the technical scheme, after the set heights of the floating track bed slabs are increased, the high polymer vibration isolation bearings can be mounted and replaced from the access holes, the floating track bed slabs is not required to be removed from the original positions, and the high polymer vibration isolation bearings in appropriate sizes are also not required to be fabricated on site, so that the replacement of the high polymer vibration isolation bearings as vibration dampers is greatly facilitated.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a track bed and a construction method thereof, and a method for replacing polymer vibration-isolation bearings. Background technique [0002] With the continuous advancement of my country's urbanization process and the increasing urban population, the ground traffic within cities and between cities is becoming more and more congested. In order to alleviate traffic pressure, more and more subway lines have been built and opened to traffic. [0003] When the subway train is running, the impact of its wheels on the track will produce strong vibration and high-intensity noise. Stronger vibrations may have adverse effects on the building structure on the surface; while subways often travel underground in densely populated areas, high-intensity noise interferes with the work, study and life of residents near the subway. Therefore, it is often necessary to reduce vibration and noise...

AI Technical Summary

Problems solved by technology

Therefore, when the vibration damping pad needs to be replaced, the floating slab track bed needs to be lifted from the top of the vibration damping pad and removed from the original horizontal position before the vibration damping pad can be replaced. After the vibration damping pad is replaced, the floating board is restored to In the original location, the construction is more difficult and time-consuming

Moreover, for the base of each section of track bed on the line, it is necessary to measure and cut the vibration damping pad according to the actual width of the base of the section, and then lay and fix it by splicing. The process is cumbersome and time-consuming

For subway lines that are already in operation, the "skylight" time (i.e., the time interval between the last train of the previous day and the first train of the following day) is insufficient to replace the damping pads; Operations on subway lines may need to be suspended, severely impacting traffic

[0007] In summary, the track bed with vibration and noise reduction functions built by existing construction methods has the disadvantage of inconvenient replacement of vibration damping devices; therefore, it is necessary to provide a track bed that is more convenient to replace vibration damping devices

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