Resonant seismic resistant ballastless track

Abstract

A resonant seismic-resistant ballastless track is disclosed to effectively attenuate the large displacement vibration energy from seismic waves and reduce the damage to the track structure. It includes track slabs continuously laid along the track direction above a foundation. Each track slab has a downward-protruding transverse support block at its longitudinal end and a downward-protruding longitudinal support block at its transverse end. Transverse and longitudinal grooves are correspondingly provided on the top surface of the foundation for the transverse and longitudinal support blocks to be embedded. An intermediate groove is provided on the top surface of the foundation at a location corresponding to the center of each track slab, and a spring vibrator is installed within each intermediate groove. A sliding vibrator is installed at the longitudinal end of the track slab between the track slab and the foundation. The main body of the spring vibrator is a large mass block, with longitudinal and transverse springs fixedly installed on its longitudinal and transverse sides, respectively. The transverse spring is fixedly connected to the longitudinal support block on the same side, and the longitudinal spring is fixedly connected to the sliding vibrator through a connecting rod passing through the transverse support block.

Description

Technical Field

[0001] This invention relates to an earthquake-resistant ballastless track, particularly a resonant earthquake-resistant ballastless track suitable for areas prone to frequent earthquakes. Background Technology

[0002] The track structure directly bears the load from the train and transfers it to the subgrade or bridge / tunnel foundations. The track structure must be robust and stable, with correct geometry, to ensure the safe operation of the train.

[0003] In earthquake-prone areas, damage to track structures caused by earthquakes, such as cracked track slabs and twisted rails, directly threatens the safe operation of trains. Because bridges deform significantly under earthquake stress, the damage to ballastless track structures on bridges is particularly severe.

[0004] The invention patent specification with authorization announcement number CN 201305796Y discloses an earthquake-resistant track slab. This track slab has rail support platforms on both sides, and the convex abutments at both ends of the track slab are removed. There are no convex abutments on the rail support platforms. The track slab is laid on a base, and a resin mortar layer is placed between the track slab and the base, bonding the resin mortar layer to both the track slab and the base. The resin mortar layer has a thickness of 15-30mm. This resin mortar layer strongly bonds the entire track system into a whole, preventing relative displacement of the track structure due to foundation vibrations and improving the track structure's earthquake resistance and vibration reduction performance.

[0005] The invention patent application CN114214876 A discloses an earthquake-resistant ballastless track structure. The structure includes a base plate and a track plate located above it. The base plate and track plate are arranged in groups along the track direction. The longitudinal ends of the base plate and track plate are stepped. Seismic elements are fixedly installed between corresponding track plate step surfaces and the lower step surface of the base plate. These seismic elements consist of transversely spaced dampers and transverse connecting rods positioned between adjacent transverse dampers, connecting the dampers into a single unit. A damped longitudinal connector is provided between adjacent groups of base plates and track plates to connect the longitudinally adjacent dampers into a single unit.

[0006] In existing published patent literature, seismic-resistant track structures primarily focus on resisting vibration loads from trains or reducing vibrations caused by vehicle-track coupled dynamics. However, there are few reports on reducing seismic wave damage to track structures caused by vibrations originating from the substructure during earthquakes, and current design of ballastless track structures in my country does not consider seismic design measures. Given that bridge structures are designed with the three-level seismic fortification principle of "no damage in minor earthquakes, repairable in moderate earthquakes, and no collapse in major earthquakes," research on seismic-resistant ballastless track structures under seismic loading is of great significance in aligning with this principle. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a resonant seismic-resistant ballastless track to effectively attenuate the large displacement vibration energy from seismic waves and reduce the damage of seismic waves to the track structure.

[0008] The technical solution adopted by this invention to solve its technical problem is as follows:

[0009] The present invention discloses a resonant seismic-resistant ballastless track, comprising track slabs continuously laid along the track direction above a foundation. The track slabs are characterized by: each track slab having a downwardly protruding transverse support block at its longitudinal end and a downwardly protruding longitudinal support block at its transverse end; a transverse groove and a longitudinal groove correspondingly provided on the top surface of the foundation for the transverse and longitudinal support blocks to be embedded; a central groove corresponding to the central portion of each track slab on the top surface of the foundation, with a spring vibrator installed in each central groove; and a sliding vibrator installed at the longitudinal end of the track slab between the track slab and the foundation; the main body of the spring vibrator is a large mass block, with longitudinal and transverse springs fixedly installed on its longitudinal and transverse sides respectively; the transverse springs are fixedly connected to the longitudinal support blocks on the same side; and the longitudinal springs are fixedly connected to the sliding vibrator via connecting rods passing through the transverse support blocks.

[0010] The sliding vibrator is installed across the expansion joint under the adjacent track slabs, and the spring vibrators under the adjacent track slabs are connected in series through the sliding vibrator.

[0011] The beneficial effects of this invention are mainly reflected in the following aspects:

[0012] 1. By setting spring oscillators at the bottom of the track slab and sliding oscillators at both ends, the energy of seismic waves can be dissipated through the large displacement vibration of the spring oscillators and sliding oscillators, protecting the track structure from minimal damage under seismic action and achieving "no damage in small earthquakes, repairable in moderate earthquakes, and no collapse in large earthquakes";

[0013] Second, energy is dissipated through the displacement vibration of spring oscillators, which is essentially a passive vibration reduction. The number of oscillators can be flexibly increased or decreased according to the seismic intensity. In particular, the large integrated vibration reduction structure is formed by connecting adjacent track slabs in series. The installation is flexible and the seismic resistance effect is obvious.

[0014] Third, regarding the innovation of the track slab and the sub-foundation, its structure is simple and easy to implement, and the installation and construction are convenient. The track slab is prefabricated as a whole in the factory and placed in the groove of the foundation on site, which simultaneously realizes the positioning and fixing of the track slab. Attached Figure Description

[0015] This instruction manual includes the following seven figures:

[0016] Figure 1 This is a schematic diagram of the assembly of adjacent track slabs of a resonant, seismic-resistant ballastless track according to the present invention;

[0017] Figure 2 This is a longitudinal section view of a resonant seismic-resistant ballastless track according to the present invention;

[0018] Figure 3 This is a perspective view of the track slab in a resonant, seismic-resistant ballastless track according to the present invention;

[0019] Figure 4 This is a three-dimensional view of the foundation in a resonant, seismic-resistant ballastless track according to the present invention;

[0020] Figure 5 This is a three-dimensional view of a spring oscillator in a resonant, seismic-resistant ballastless track according to the present invention;

[0021] Figure 6 This is a schematic diagram of the arrangement of spring oscillators in a resonant, seismic-resistant ballastless track according to the present invention;

[0022] Figure 7 This is a schematic diagram of the sliding oscillator in a resonant, seismic-resistant ballastless track according to the present invention;

[0023] The diagram shows the component names and their corresponding markings: track plate 10, transverse support block 11, longitudinal support block 12, foundation 20, transverse groove 21, longitudinal groove 22, intermediate groove 23, spring vibrator 31, longitudinal spring 32, transverse spring 33, adjusting pad 34, sliding vibrator 41, friction pad 42, box body 43, connecting rod 44. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Reference Figures 1 to 6This invention discloses a resonant, seismic-resistant ballastless track, comprising track slabs 10 continuously laid along the track direction above a foundation 20. On the bottom surface of each track slab 10, a transverse support block 11 protrudes downward at its longitudinal end, and a longitudinal support block 12 protrudes downward at its transverse end. On the top surface of the foundation 20, transverse grooves 21 and longitudinal grooves 22 are correspondingly provided for the transverse support blocks 11 and longitudinal support blocks 12 to be embedded. On the top surface of the foundation 20, a central groove 23 is provided at a location corresponding to the central portion of each track slab 10. A spring vibrator 31 is disposed within each central groove 23. A sliding vibrator 41 is disposed at the longitudinal end of the track slab 10 between the track slab 10 and the foundation 20. The main body of the spring vibrator 31 is a large mass block, with longitudinal springs 32 and transverse springs 33 fixedly disposed on its longitudinal and transverse sides, respectively. The transverse springs 33 are fixedly connected to the longitudinal support blocks 12 on the same side, and the longitudinal springs 32 are fixedly connected to the sliding vibrator 41 via connecting rods 44 passing through the transverse support blocks 11. Under the action of a large earthquake, the interaction between the large-mass spring oscillator 31 and the sliding oscillator 41, especially the longitudinal and lateral oscillation of the spring oscillator 31, effectively attenuates the large displacement vibration energy from the seismic wave, thereby dissipating the energy of the seismic wave and reducing the damage of the seismic wave to the track structure.

[0026] Reference Figure 1 and Figure 2 The sliding vibrator 41 is installed across the expansion joint under the adjacent track slab 10, and the spring vibrators 31 under the adjacent track slab 10 are connected in series through the sliding vibrator 41 to achieve series vibration reduction and improve the overall vibration reduction effect.

[0027] Reference Figure 2 Adjusting pads 34 are fixedly installed on the bottom surface of the intermediate groove 23 and the corresponding bottom surface of the track plate 10. The pair of adjusting pads 34 forms a sliding friction pair with the top and bottom surfaces of the main body of the spring oscillator 31. The pair of adjusting pads 34 are used to adjust the relative position between the spring oscillator 32 and the track plate 10 and the foundation 20. The sliding friction pair formed with the sliding oscillator 41 can also further dissipate seismic wave energy.

[0028] Reference Figure 2 and Figure 7 The sliding vibrator 41 is installed inside the housing 43, which is located outside the transverse support block 11. Friction pads 42 are provided on the bottom surface of the track plate 10 and the top surface of the foundation 20. The friction pads 42 form a sliding friction pair with the top and bottom surfaces of the housing 43, and the sliding vibrator 41 forms a sliding friction pair with the inner wall of the housing 43, thereby realizing sliding vibration reduction.

[0029] Reference Figure 6As a preferred embodiment of the present invention, two longitudinal springs 32 are arranged laterally at intervals along the track plate 10, two transverse springs 33 are arranged longitudinally at intervals, and two sliding vibrators 41 are arranged laterally at intervals relative to the spring vibrators 31 at the longitudinal end of the track plate 10.

[0030] The above description is merely an illustration of some principles of a resonant, seismic-resistant ballastless track according to the present invention, and is not intended to limit the present invention to the specific structures and applicable scope shown and described. Therefore, all possible modifications and equivalents that may be used fall within the scope of the patent application of this invention.

Claims

1. A resonant seismic-resistant ballastless track comprising track slabs (10) laid continuously in the direction of the track above a foundation (20), characterized in that: On the bottom surface of each track plate (10), there is a transverse support block (11) protruding downward at the longitudinal end and a longitudinal support block (12) protruding downward at the transverse end. On the top surface of the foundation (20), there are transverse grooves (21) and longitudinal grooves (22) for the transverse support block (11) and longitudinal support block (12) to be embedded. On the top surface of the foundation (20), there are intermediate grooves (23) corresponding to the central part of each track plate (10). Spring vibrators (31) are installed in each intermediate groove (23). Sliding vibrators (41) are installed between the track plate (10) and the foundation (20) at the longitudinal end of the track plate (10). The main body of the spring vibrator (31) is a large mass block. Longitudinal springs (32) and transverse springs (33) are fixedly installed on its longitudinal and transverse sides respectively. The transverse springs (33) are fixedly connected to the longitudinal support block (12) on the same side. The longitudinal springs (32) are fixedly connected to the sliding vibrators (41) through the connecting rod (44) passing through the transverse support block (11).

2. A resonant seismic free track according to claim 1, characterized in that: The sliding vibrator (41) is installed across the expansion joint under the adjacent track plate (10), and the spring vibrators (31) under the adjacent track plate (10) are connected in series through the sliding vibrator (41).

3. A resonant seismic free track according to claim 1, characterized in that: Adjustment pads (34) are fixedly installed on the bottom surface of the intermediate groove (23) and the corresponding bottom surface of the track plate (10). The pair of adjustment pads (34) forms a sliding friction pair with the top and bottom surfaces of the main body of the spring vibrator (31).

4. A resonant seismic free track according to claim 1, characterized in that: The sliding vibrator (41) is installed inside the box (43), and the sliding vibrator (41) forms a sliding friction pair with the inner wall of the box (43); friction pads (42) are set on the bottom surface of the track plate (10) and the top surface of the foundation (20), and the friction pads (42) form a sliding friction pair with the top and bottom surfaces of the box (43).

5. A resonant seismic free track according to any one of claims 1 to 4, characterized in that: Two longitudinal springs (32) are arranged laterally along the track plate (10), two transverse springs (33) are arranged longitudinally, and two sliding vibrators (41) are arranged laterally at the longitudinal end of the track plate (10) relative to the spring vibrators (31).

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