Vibration isolating support structure of damping spring floating track bed and installation method thereof

Abstract

The invention discloses a vibration isolating support structure of a damping spring floating track bed and an installation method thereof, which comprises a pre-buried sleeve (9) and a vibration isolator component (10). The pre-buried sleeve (9) is cast in a floating plate type track bed body (14) as a whole, bearing convex tables (3, 4 and 17) are fixedly arranged in the pre-buried sleeve (9), a pre-buried anchor bar (8) which extends into the bed body is arranged outside of the pre-buried sleeve (9), and the vibration isolator component (10) is arranged in the pre-buried sleeve (9) and can support the floating plate type track bed body (14) and isolate the vibration of the floating plate type track bed body (14) through the pre-buried sleeve (9). The vibration isolating support structure can provide emergency safety measures under the extreme condition, so that when the fatigue fracture of a large quantity of support springs occurs suddenly, the local settlement of the floating plate type track bed can be limited within the safety limit range of a few millimeters, thereby preventing the spring breakage accident to endanger the safe running of trains, and greatly improving the security coefficient of the floating plate type track bed.

Description

technical field [0001] The invention relates to a support structure of a track bed in subway rail transit and an installation method thereof, in particular to a damping spring floating ballast bed vibration isolation support structure and an installation method thereof for eliminating noise or vibration in the subway rail transit. Background technique [0002] With the rapid development of the national economy, rail transit has quickly become a hot spot in the development of urban transportation construction due to its advantages of convenience, speed, punctuality, energy saving, and effective relief of ground traffic congestion. However, its vibration and noise pollution will also have a certain negative impact on the environment along the line, and necessary vibration isolation and noise reduction measures must be taken during the construction period. At present, track vibration isolation technologies such as elastic fasteners, track shock absorbers, trapezoidal sleepers, ...

AI Technical Summary

Problems solved by technology

The problem with this structure is that since the spring 21 is only partly soaked in the liquid damping material or embedded in the solid damping material, its damping effect is uneven and the relative action range can only be the reciprocal of the number of coils of the spring, which cannot fully utilize the damping agent. Compared with the damping effect of the overall deformation; on the other hand, in case of fatigue fracture of the spring 21, the existing vibration isolator assembly cannot provide an effective emergency limit, which is likely to cause excessive subsidence of the floating track bed, and even damage the smooth running of the vehicle serious, it may endanger driving safety

[0004] In addition, during the construction process of the spring floating slab track bed, the steel spring pre-embedded sleeve will be tilted due to the disturbance of the steel bar binding and welding process, resulting in a level error, which often leads to uneven stress or nonlinear deformation of the spring

like Figure 9 , 9a Shown is the gasket structure inside the damping spring floating plate vibration isolation ballast bed vibration isolator in the prior art, which adopts the integral gasket 6' with a hole in the middle. The gasket of this integral structure not only consumes a lot of steel materials, but also has high processing costs , and the difference compensation adjustment cannot be made for the horizontal plane inclination error between the support points generated during the positioning, installation and pouring process of the vibration isolator tank

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