A high-bearing capacity vibration-damping ballast and railway track

Abstract

The invention relates to the technical field of track vibration reduction, and in particular to a high-bearing-capacity vibration-reducing ballast and railway track, wherein the ballast comprises a floating plate ballast and a vibration-reducing structure, wherein the vibration-reducing structure comprises a vertical energy-absorbing vibration-isolating device and a lateral stabilizing device; the vertical energy-absorbing vibration-isolating device is located at the bottom edge of the floating plate ballast; the vertical energy-absorbing vibration-isolating device is fixedly connected to the foundation by bolts; the lateral stabilizing device is fixedly connected to the floating plate ballast and the inner wall of the tunnel by bolts; the vertical energy-absorbing vibration-isolating device comprises an outer sleeve, a vertical energy-absorbing vibration-isolating element and a limiting cavity; a placement space is formed between the outer sleeve and the limiting cavity, and the vertical energy-absorbing vibration-isolating element is installed in the placement space; a high-damping liquid is injected into the placement space; the lateral stabilizing device comprises an upper and a lower connecting clamping plates and a lateral stabilizing element, which effectively improves the bearing capacity, energy-absorbing capacity and durability of the vertical energy-absorbing vibration-isolating device, thereby producing a good vibration reduction effect.

Description

Technical Field

[0001] The invention relates to the technical field of track vibration reduction, in particular to a high-bearing-capacity vibration reduction ballast and a railway track. Background Art

[0002] With the continuous deepening of urbanization, the urban TOD (transit-oriented development) model has gradually become the focus of urban development. Among them, the subway-covered model, which takes the subway as the core and builds corresponding supporting measures and building structures (such as residential houses and commercial areas) in the upper area or adjacent areas of the subway, is one of the key parts of the TOD model. However, the rapid development of the subway-covered model will also bring about problems that cannot be ignored, that is, the vibration generated by the subway will be transmitted to the upper structure through the underground soil, causing discomfort to the human body and interference or damage to precision instruments and parts. In response to the vibration problem of the subway, the most commonly used vibration isolation solution is the steel spring floating plate roadbed vibration isolation technology. This technology has a certain effect on reducing the impact of subway vibration on the upper and surrounding areas. However, the core of the steel spring floating plate roadbed vibration isolation is the steel spring support, which has very limited bearing capacity and energy consumption capacity. In addition, the height limit of the floating plate roadbed also limits the height of the steel spring, that is, the range of vibration isolation is also very limited.

[0003] In summary, the existing floating slab roadbed vibration isolation technology still lacks sufficient bearing capacity and energy dissipation capacity, which limits the vibration isolation effect and, to a certain extent, restricts the development of the subway over-cover model and even the TOD model. Therefore, there is an urgent need to develop a floating slab roadbed vibration isolation system with sufficient bearing capacity, energy dissipation capacity and durability. Summary of the invention

[0004] The purpose of the present application is to provide a high-bearing capacity vibration-damping ballast and railway track, aiming to solve the problems in the prior art.

[0005] The embodiment of the present application provides a high-bearing capacity vibration-damping ballast, including a floating plate ballast and a vibration-damping structure, wherein the floating plate ballast is in an inverted trapezoidal shape; the vibration-damping structure includes a vertical energy-absorbing vibration-isolating device and a lateral stabilizing device; the vertical energy-absorbing vibration-isolating device is located at the bottom edge of the floating plate ballast; the vertical energy-absorbing vibration-isolating device is fixedly connected to the foundation by bolts; the lateral stabilizing device is located on both sides of the floating plate ballast; the lateral stabilizing device is fixedly connected to the floating plate ballast and the inner wall of the tunnel by bolts; the vertical energy-absorbing vibration-isolating device includes An outer sleeve, a vertical energy dissipation and vibration isolation element and a limiting cavity; a placement space is formed between the outer sleeve and the limiting cavity, and the vertical energy dissipation and vibration isolation element is installed in the placement space; a high-damping liquid is injected into the placement space; the lateral stabilization device comprises upper and lower connecting clamps and a lateral stabilization element; the lateral stabilization element is composed of a plurality of semi-arc steel wire rings arranged in sequence and connected; upper and lower connecting clamps are respectively provided at the two end points and the vertex of the arc of the semi-arc steel wire ring, and the plurality of semi-arc steel wire rings are clamped and fixed by the upper and lower connecting clamps.

[0006] Furthermore, the vertical energy dissipation and vibration isolation element is a three-layer annular spring, a double-layer annular spring or a disc spring.

[0007] Furthermore, the high damping liquid is dimethyl silicone oil or other liquids with high damping properties.

[0008] Furthermore, a liquid return pipe and a transparent window are provided on the surface of the outer sleeve; a liquid replenishing port is provided on the liquid return pipe; a top cover and a bottom plate are provided on the upper and lower sides of the outer sleeve respectively; and the upper and lower ends of the liquid return pipe are connected to the placement space.

[0009] A railway track comprises the above-mentioned high-bearing-capacity vibration-damping ballast, a track, a tunnel wall and a foundation; the track is installed on the high-bearing-capacity vibration-damping ballast.

[0010] The beneficial effects of the present invention are as follows: when the present invention bears vertical loads, the vertical energy dissipation and vibration isolation elements act simultaneously with the high-damping liquid, effectively improving the bearing capacity, energy dissipation capacity and durability of the vertical energy dissipation and vibration isolation device, thereby producing a good vibration reduction effect. At the same time, the lateral stabilization element provides energy dissipation and vibration isolation effects through shear deformation, and the lateral stabilization device can provide horizontal bearing capacity and energy dissipation capacity, thereby improving the horizontal stability of the floating slab roadbed when experiencing an earthquake or when a subway train is running on a curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0012] Figure 2 It is a schematic diagram of the side structure of the vertical energy dissipation vibration isolation device;

[0013] Figure 3It is a schematic diagram of the cross-sectional structure of the vertical energy dissipation vibration isolation device;

[0014] Figure 4 It is a schematic diagram of the cross-sectional structure of the vertical energy dissipation and vibration isolation element;

[0015] Figure 5 It is a working schematic diagram of the vertical energy dissipation vibration isolation device when it is subjected to vertical pressure;

[0016] Figure 6 It is a schematic diagram of the side structure of the lateral stabilizing device;

[0017] Figure 7 It is a schematic diagram of the working of the stabilizing device when it is subjected to vertical pressure;

[0018] Figure 8 It is a structural schematic diagram of a vertical energy dissipation vibration isolation device when a double-layer annular spring is used as a vertical energy dissipation vibration isolation element;

[0019] Fig. 9 It is a structural schematic diagram of a vertical energy dissipation vibration isolation device when a disc spring is used as a vertical energy dissipation vibration isolation element;

[0020] Fig.10 Schematic diagram of the structure using a rubber body as a lateral stabilization element.

[0021] In the figure:

[0022] 1. Floating plate ballast; 2. Track; 3. Tunnel wall; 4. Vertical energy dissipation and vibration isolation device; 401. Three-layer annular spring inner spring; 402. Three-layer annular spring middle spring; 403. Three-layer annular spring outer spring; 404. Top cover; 405. Outer sleeve; 406. High damping liquid; 407. Bottom plate; 408. Limiting cavity; 409. Bubble; 410. Liquid filling port; 411. Transparent window; 412. Liquid return pipe; 41. Double-layer annular spring; 43. Disc spring; 5. Lateral stabilization device; 501. Semi-arc wire ring; 502. Upper and lower connecting splints; 51. Rubber body; 6. Foundation. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1A high-bearing vibration-damping ballast shown in the figure comprises a floating ballast 1 and a vibration-damping structure, wherein the floating ballast 1 is in an inverted trapezoidal shape; the vibration-damping structure comprises a vertical energy-absorbing vibration-isolating device 4 and a lateral stabilizing device 5; the vertical energy-absorbing vibration-isolating device 4 is located at the bottom of the floating ballast 1; the vertical energy-absorbing vibration-isolating device 4 is fixedly connected to the foundation 6 by bolts; the lateral stabilizing device 5 is located on both sides of the floating ballast 1; the lateral stabilizing device 5 is fixedly connected to the floating ballast 1 and the inner wall 3 of the tunnel by bolts; as shown in FIG. Figure 2-Figure 4 As shown, the vertical energy dissipation vibration isolation device 4 includes an outer sleeve 405, a vertical energy dissipation vibration isolation element and a limiting cavity 408; a placement space is formed between the outer sleeve 405 and the limiting cavity 408, and the vertical energy dissipation vibration isolation element is installed in the placement space; high damping liquid 406 is injected into the placement space; the placement space is an annular space formed by the outer sleeve 405 and the outer wall of the limiting cavity 408, which can limit the horizontal displacement of the vertical energy dissipation vibration isolation element, and the lateral stabilization device 5 includes upper and lower connecting splints 502 and a lateral stabilization element.

[0025] The vertical energy dissipation and vibration isolation element is a three-layer annular spring, a double-layer annular spring 41 or a disc spring 43. Figure 2-Figure 4 Three layers of annular springs are used, which are three-layer annular spring inner spring 401, three-layer annular spring middle spring 402, and three-layer annular spring outer spring 403. The inner spring, outer spring and middle spring are installed by overlapping each other to form a vertical energy dissipation vibration isolation element. The three-layer annular spring has the advantages of large load capacity, strong energy dissipation and vibration reduction ability, large restoring force and small deformation, which effectively improves the vertical bearing capacity of the roadbed. In addition, when the design requirements tend to cost control and large deformation capacity, the vertical energy dissipation vibration isolation device 4 can use a double-layer annular spring 41 or a disc spring 43 as a vertical energy dissipation vibration isolation element, such as Figures 8 to 9 shown.

[0026] The high damping liquid 406 is dimethyl silicone oil or other liquids with high damping properties. When subjected to vertical load, the high damping liquid 406 is squeezed and flows out from the lower end of the return pipe, passes through the entire return pipe, and then flows into the device from the upper end of the return pipe; when the device is unloaded, the high damping liquid 406 flows out from the upper end of the return pipe, passes through the entire return pipe, and then flows into the device from the lower end of the return pipe. The high damping liquid in the entire device is fully utilized, and the durability of the vertical energy dissipation vibration isolation element is improved.

[0027] A liquid return pipe 421 and a transparent window 411 are provided on the surface of the outer sleeve 405; a liquid replenishing port 410 is provided on the liquid return pipe 421; a top cover 404 and a bottom plate 407 are provided on the upper and lower sides of the outer sleeve 405 respectively; the upper and lower ends of the liquid return pipe 421 are connected with the placement space, and the high-damping liquid 406 is injected into the placement space through the liquid replenishing port 410 on the liquid return pipe 421. When the vertical energy dissipation vibration isolation device 4 is in normal use, the liquid replenishing port 410 is in a closed state, so the high-damping liquid 406 in the liquid return pipe 412 will retain the bubbles 409, and the liquid level of the high-damping liquid 406 can be observed through the transparent window 411, and it is determined whether to open the liquid replenishing port 410 to replenish the high-damping liquid 406 according to the liquid level.

[0028] like Figure 6 and Figure 7 As shown, the lateral stabilizing element is composed of a plurality of semi-arc wire rings 501 arranged in sequence and connected to each other; upper and lower connecting clamps 502 are respectively provided at the two end points and the arc vertex of the semi-arc wire ring 501, and the plurality of semi-arc wire rings 501 are clamped and fixed by the upper and lower connecting clamps 502, and the upper and lower connecting clamps 502 are respectively fixedly connected to the floating plate ballast 1 and the inner wall 3 of the tunnel by bolts. The semi-arc wire ring 501 has strong nonlinear energy dissipation and vibration reduction capabilities and has three-way energy dissipation capabilities. Technicians in this field can flexibly design it according to different actual vibration control requirements.

[0029] like Fig.10 As shown, the lateral stabilizing element may also be composed of a plurality of rubber bodies 51 arranged in sequence. When the design requirement is biased towards a large horizontal load-bearing capacity, the lateral stabilizing device may use the rubber body 51 as the lateral stabilizing element.

[0030] like Figure 1 A railway track shown includes the high-bearing capacity vibration-damping ballast bed, a track 2, a tunnel wall 3 and a foundation 6 in the above-mentioned embodiment; the track 2 is installed on the high-bearing capacity vibration-damping ballast bed to effectively reduce the vibration of the railway track.

[0031] When the vibration force of the railway track is transmitted to the ballast bed, when the vertical energy dissipation vibration isolation device 4 is subjected to a vertical load, the top cover 404 moves downward, thereby squeezing the middle spring 402 of the top three-layer annular spring. The middle spring 402 squeezes the inner spring 401 and the outer spring 403 through the conical surfaces on both sides thereof, so that the two produce radial deformation inward and outward directions respectively, and the space spacing between each middle spring 402 is reduced. In this process, vibration isolation and energy dissipation are achieved through the squeezing and contact surface friction between the inner spring 401 and the outer spring 403 and the middle spring 402. The vertical component of the reaction force generated by the deformation of the inner spring 401 and the outer spring 403 on the cone surface provides a vertical restoring force to achieve a self-resetting effect, and the high-damping liquid 406 can provide a higher damping effect during the compression process of the vertical energy dissipation vibration isolation device 4, thereby improving the vertical energy dissipation and vibration reduction capacity of the device as a whole, and at the same time improving the durability of the vertical energy dissipation and vibration isolation element. In this process, the high-damping liquid 406 will be compressed by the vertical load, and at this time, the bubble 409 in the return pipe will also be compressed and become smaller, such as Figure 5 shown.

[0032] When the lateral stabilizer 5 is subjected to the load transmitted by the ballast bed, the upper and lower connecting clamps 502 will simultaneously produce mutual compression and displacement, causing the semi-arc wire ring 501 to produce compression and shear deformation, providing horizontal bearing capacity and energy dissipation capacity, and thus producing a nonlinear energy dissipation and vibration reduction effect.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-bearing capacity vibration-damping ballast bed, characterized in that: It comprises a floating plate ballast and a vibration reduction structure, wherein the floating plate ballast is in an inverted trapezoidal shape; the vibration reduction structure comprises a vertical energy absorption vibration isolation device and a lateral stabilization device; the vertical energy absorption vibration isolation device is located at the bottom edge of the floating plate ballast; the vertical energy absorption vibration isolation device is fixedly connected to the foundation by bolts; the lateral stabilization device is located on both sides of the floating plate ballast; the lateral stabilization device is fixedly connected to the floating plate ballast and the inner wall of the tunnel by bolts; the vertical energy absorption vibration isolation device comprises an outer sleeve, a vertical energy absorption vibration isolation element and a limiting cavity; a placement space is formed between the outer sleeve and the limiting cavity, and the vertical energy absorption vibration isolation element is installed in the placement space; a high damping liquid is injected into the placement space; the lateral stabilization device comprises an upper and lower connecting clamping plates and a lateral stabilization element; The lateral stabilizing element is composed of a plurality of semi-arc wire loops arranged in sequence and connected to each other; upper and lower connecting clamps are respectively provided at the two end points and the arc vertex of the semi-arc wire loop, and the plurality of semi-arc wire loops are clamped and fixed by the upper and lower connecting clamps.

2. The high-bearing capacity vibration-damping ballast according to claim 1, characterized in that: The vertical energy dissipation and vibration isolation element is a three-layer annular spring, a double-layer annular spring or a disc spring.

3. The high-load-bearing vibration-damping ballast according to claim 1, characterized in that: The high damping liquid is dimethyl silicone oil or other liquids with high damping properties.

4. The high-load-bearing vibration-damping ballast according to claim 1, characterized in that: A liquid return pipe and a transparent window are arranged on the surface of the outer sleeve; a liquid replenishing port is arranged on the liquid return pipe; a top cover and a bottom plate are arranged on the upper and lower sides of the outer sleeve respectively; and the upper and lower ends of the liquid return pipe are connected with the placement space.

5. A railway track, characterized in that: It comprises the high-bearing capacity vibration-damping ballast bed, track, tunnel wall and foundation described in any one of claims 1 to 4; the track is installed on the high-bearing capacity vibration-damping ballast bed.

Images