Floating slab ballast bed nonlinear connection system with multiple defensive lines

Abstract

The invention discloses a floating slab track bed nonlinear connection system with multiple defensive lines, which comprises a front floating slab track bed, a rear floating slab track bed and a connection assembly, a gap is formed between the front floating slab track bed and the rear floating slab track bed, the connection assembly is installed in the gap, the connection assembly is used for connecting the front floating slab track bed and the rear floating slab track bed, and the front floating slab track bed and the rear floating slab track bed are connected through the connection assembly. The connecting assembly comprises a vibration isolation mechanism and a connecting mechanism, the vibration isolation mechanism is connected with the connecting mechanism, the vibration isolation mechanism is connected with the front floating slab track bed and the rear floating slab track bed through the connecting mechanism, and the vibration isolation mechanism is used for reducing vibration of the front floating slab track bed and the rear floating slab track bed. Under the combined action of the vibration isolation mechanism and the connecting mechanism, the vibration isolation and kinetic energy dissipation capacities of the floating slab track bed are improved, meanwhile, the connecting strength can be increased according to changes of excitation loads, and the integrity of the floating slab track bed is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering vibration isolation, and in particular to a floating slab track bed nonlinear connection system with multiple defense lines. Background Art

[0002] Floating slab ballast is currently widely used to reduce the vibration impact caused by rail transit operation due to its excellent vibration isolation ability. At the same time, in order to enhance the integrity, shear hinges are usually installed between the front and rear floating slab ballasts to reduce the problem of excessive vertical displacement of the track.

[0003] The prior art discloses an invention patent entitled a shear hinge for a floating slab track bed and an application method thereof (publication number: CN118241508A). The invention pre-buries grooves in the front and rear floating slab track beds, and places shear rods in the pre-buried casing as the main body of the shear hinge. The shear hinge realizes that different numbers of shear rods can be freely installed by controlling the size of the pre-buried casing, and the installation is flexible and convenient.

[0004] The main function of the shear hinge of the floating slab track bed of the above invention is to transmit shear force and increase the vibration mass. It itself does not have the ability to reduce vibration and cannot help the floating slab track bed to dissipate vibration. At the same time, the existing shear hinge has a simple structure and limited strength. It may still break when used for a long time or encountering extreme conditions, resulting in increased maintenance costs for rail transit.

[0005] In summary, according to the shortcomings of the existing shear hinges of the floating slab ballast, there is a need for a floating slab ballast connection system that can effectively reduce vibration and flexibly increase the shear strength according to external excitation conditions. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a nonlinear connection system of a floating slab ballast with multiple lines of defense, which improves the ability of the floating slab ballast to isolate vibration and dissipate kinetic energy under the joint action of the vibration isolation mechanism and the connection mechanism, and at the same time can increase the connection strength according to the change of the excitation load, thereby improving the integrity of the floating slab ballast.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A nonlinear connection system of a floating slab roadbed with multiple lines of defense, comprising a front floating slab roadbed and a rear floating slab roadbed, wherein a gap is formed between the front floating slab roadbed and the rear floating slab roadbed; the system is characterized in that it also comprises a connecting assembly, which is installed in the gap, and is used to connect the front floating slab roadbed and the rear floating slab roadbed, and the connecting assembly comprises a vibration isolation mechanism and a connecting mechanism, the vibration isolation mechanism is connected to the connecting mechanism, and the vibration isolation mechanism is connected to the front floating slab roadbed and the rear floating slab roadbed via the connecting mechanism, and the vibration isolation mechanism is used to reduce the vibration of the front floating slab roadbed and the rear floating slab roadbed.

[0009] Furthermore, the vibration isolation mechanism includes a connecting steel plate and a wire rope ring. The wire rope ring is formed by kneading a number of steel wires together. The connecting steel plate is rectangular and a connecting clamp is provided on the connecting steel plate. The wire rope ring passes through the connecting clamp.

[0010] Furthermore, the connecting mechanism includes an inner U-shaped steel, an intermediate U-shaped steel and an outer U-shaped steel, which are stacked in sequence, and the sizes of the inner U-shaped steel, the intermediate U-shaped steel and the outer U-shaped steel increase in sequence, the inner U-shaped steel is connected to the connecting steel plate, and the outer U-shaped steel is connected to the front floating slab roadbed and the rear floating slab roadbed.

[0011] Furthermore, it also includes a fixed steel plate, which is rectangular and fixed to the connecting mechanism. The fixed steel plate is used to fix the connecting assembly to the gap. The front floating plate ballast and the rear floating plate ballast are provided with grooves on the corresponding fixed steel plates, and the grooves match the fixed steel plates.

[0012] Furthermore, the connecting steel plate is provided with fixing hole one, the fixing steel plate is correspondingly provided with fixing hole two, the inner U-shaped steel is provided with long hole one, the middle U-shaped steel is provided with long hole two, and the outer U-shaped steel is provided with long hole three. The fixing bolts pass through fixing hole one, long hole one, long hole two, long hole three and fixing hole two in sequence to fix the connecting component to the gap.

[0013] Furthermore, the lengths of the first elongated hole, the second elongated hole and the third elongated hole increase in sequence.

[0014] Furthermore, the first fixing hole and the second fixing hole are concentrically arranged.

[0015] Furthermore, when the front floating slab roadbed and the rear floating slab roadbed are vibrated, the front floating slab roadbed and the rear floating slab roadbed undergo relative displacement, and the fixed steel plate drives the connecting steel plate to move relative to each other through the fixing bolts, so that the wire rope ring undergoes shear deformation to achieve vibration reduction. At this time, the fixing bolt moves within the length range of the long hole one, and the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel do not change.

[0016] Furthermore, when the vibration of the front floating slab track bed and the rear floating slab track bed exceeds the shear deformation of the wire rope ring, the fixed steel plate drives the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel to move and shear deform in turn through the fixing bolts, thereby increasing the shear resistance between the front floating slab track bed and the rear floating slab track bed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, a connecting assembly with shear deformation ability is used to connect the front floating plate track bed and the rear floating plate track bed. When the front floating plate track bed and the rear floating plate track bed are subjected to vibration and impact, the relative vertical displacement of the front floating plate track bed and the rear floating plate track bed drives the connecting assembly to shear deformation, and the shear deformation of the wire rope ring and the mutual friction of the wire ropes respectively play the role of isolating vibration and dissipating kinetic energy. At the same time, through the sequential increase of the lengths of the long strip hole one, the long strip hole two and the long strip hole three, when the relative vertical displacement of the front floating plate track bed and the rear floating plate track bed exceeds a certain threshold, the fixing bolts are sequentially pressed against the long strip holes. The edges of hole one, long hole two and long hole three, thereby driving the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel to move and shear deform in turn, increasing the shear stiffness of the connecting components, providing stronger shear resistance between the front floating slab roadbed and the rear floating slab roadbed, and further suppressing the increase of the vertical displacement of the floating slab roadbed. At this time, the high energy dissipation capacity coupled with multiple energy dissipation mechanisms such as friction between the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel and metal deformation can effectively reduce the adverse effects of kinetic energy and provide multiple lines of defense for the rail transit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a nonlinear connection system of a floating slab ballast with multiple defense lines according to the present invention;

[0021] Figure 2 For the present invention Figure 1 A top view of

[0022] Figure 3 It is a structural schematic diagram of the connection assembly in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the vibration isolation mechanism in the present invention;

[0024] Figure 5 It is a structural schematic diagram of the connecting mechanism in the present invention;

[0025] Figure 6 For the present invention Figure 5 Side view of

[0026] Figure 7 It is a working schematic diagram of the vibration isolation mechanism in the present invention;

[0027] Figure 8 It is a schematic diagram of the working of the vibration isolation mechanism and the connecting mechanism in the present invention.

[0028] In the figure: 1-front floating plate ballast; 2-rear floating plate ballast; 3-gap; 4-connecting assembly; 5-vibration isolation mechanism; 6-connecting mechanism; 7-connecting steel plate; 8-wire rope ring; 9-connecting clamp; 10-inner U-shaped steel; 11-middle U-shaped steel; 12-outer U-shaped steel; 13-fixing steel plate; 14-fixing hole one; 15-fixing hole two; 16-long hole one; 17-long hole two; 18-long hole three. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] like Figures 1 to 6 As shown, a nonlinear connection system of a floating plate ballast with multiple defense lines of the present invention comprises a front floating plate ballast 1, a rear floating plate ballast 2, a connection assembly 4 and a fixed steel plate 13. A gap 3 is formed between the front floating plate ballast 1 and the rear floating plate ballast 2. The front floating plate ballast 1 and the rear floating plate ballast 2 are provided with grooves on the fixed steel plates 13 corresponding to the fixed steel plates 13. The grooves match the fixed steel plates 13. The connection assembly 4 is installed in the gap 3 and fixed to the front floating plate ballast 1 and the rear floating plate ballast 2 through the fixed steel plates 13. The connection assembly 4 is used to connect the front floating plate ballast 1 and the rear floating plate ballast 2 and improve the vibration resistance and shear resistance of the front floating plate ballast 1 and the rear floating plate ballast 2.

[0031] The connecting assembly 4 includes a vibration isolation mechanism 5 and a connecting mechanism 6. The vibration isolation mechanism 5 is installed in the connecting mechanism 6 and connected to the connecting mechanism 6. The fixing steel plate 13 is installed on the outside of the connecting mechanism 6. The connecting mechanism 6 is connected to the front floating plate ballast 1 and the rear floating plate ballast 2 through the fixing steel plate 13. The vibration isolation mechanism 5 is used to reduce the vibration of the front floating plate ballast 1 and the rear floating plate ballast 2.

[0032] The vibration isolation mechanism 5 includes two connecting steel plates 7 and a wire rope ring 8. The connecting steel plates 7 are rectangular. The wire rope ring 8 is formed by kneading a number of steel wires together. A connecting clamp 9 is provided on the connecting steel plates 7. Both sides of the wire rope ring 8 pass through the connecting clamps 9 on the two connecting steel plates 7 to achieve a fixed connection with the connecting steel plates 7.

[0033] In the present invention, the connecting clamps 9 on the connecting steel plate 7 are correspondingly arranged, and there are multiple connecting clamps 9. The number of wire rope rings 8 is consistent with that of the connecting clamps 9. The specific arrangement can be based on actual use. In the present embodiment, there are three connecting clamps 9 and three wire rope rings 8 respectively, which enhances the vibration reduction ability of the vibration isolation mechanism 5 and achieves a better vibration reduction effect.

[0034] The connecting mechanism 6 includes an inner U-shaped steel 10, an intermediate U-shaped steel 11 and an outer U-shaped steel 12. The inner U-shaped steel 10, the intermediate U-shaped steel 11 and the outer U-shaped steel 12 are stacked from the inside to the outside, and the sizes of the inner U-shaped steel 10, the intermediate U-shaped steel 11 and the outer U-shaped steel 12 increase successively. The shape of the fixed steel plate 13 is rectangular. Two fixed steel plates 13 are provided. The two fixed steel plates 13 are respectively fitted with the outer surfaces of both sides of the outer U-shaped steel 12. The outer U-shaped steel 12 is connected to the front floating plate track bed 1 and the rear floating plate track bed 2 through the fixed steel plates 13. The two connecting steel plates 7 are respectively fitted with the inner surfaces of both sides of the inner U-shaped steel 10, and are finally fixed to the front floating plate track bed 1 and the rear floating plate track bed 2 by fixing bolts that pass through the connecting steel plates 7, the inner U-shaped steel 10, the intermediate U-shaped steel 11, the outer U-shaped steel 12 and the fixed steel plates 13 in sequence.

[0035] Specifically, a fixing hole 14 is provided between each two adjacent connecting clamps 9 of the connecting steel plate 7, and a fixing hole 15 is provided on the fixing steel plate 13 corresponding to the fixing hole 14. The fixing hole 14 and the fixing hole 15 are concentrically arranged. The inner U-shaped steel 10 is provided with a long hole 16, the middle U-shaped steel 11 is provided with a long hole 17, and the outer U-shaped steel 12 is provided with a long hole 3 18. The fixing bolts are passed through the fixing hole 14, the long hole 16, the long hole 17, the long hole 3 18 and the fixing hole 15 in sequence to fix the connecting component 4 to the gap 3.

[0036] In the present invention, the lengths of the elongated hole 16, the elongated hole 2, 17 and the elongated hole 3, 18 increase sequentially, that is, the length of the elongated hole 2, 17 is greater than the elongated hole 16, and the length of the elongated hole 3, 18 is greater than the elongated hole 2, 17. In this embodiment, there are two fixing holes 14 provided between each two adjacent connecting clamps 9, and the length of the elongated hole 1, 16 is not less than the spacing H between the two fixing holes 1, so that the fixing bolt can move in the direction of the elongated hole 1, the elongated hole 2, 17 and the elongated hole 3, 18.

[0037] like Figure 7 As shown, when the track is subjected to vibration and impact caused by the high-speed running of the subway, the front floating plate roadbed 1 and the rear floating plate roadbed 2 are subjected to relative displacement due to the vibration, and the front floating plate roadbed 1 and the rear floating plate roadbed 2 drive the connecting steel plates 7 on both sides to move relative to each other through the corresponding fixed steel plates 13 and the fixing bolts, so that the wire rope ring 8 is shear-deformed. The wire rope ring 8 isolates the vibration due to the time lag effect caused by its nonlinear mechanical behavior, and at the same time, the friction energy dissipated by the friction between the steel wires inside it dissipates the kinetic energy. At this time, the fixing bolt moves within the length range of the long hole 16, and the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12 do not change.

[0038] like Figure 8As shown, when the vibration of the front floating plate ballast 1 and the rear floating plate ballast 2 exceeds the shear deformation of the wire rope ring 8, the fixed steel plate 13 first drives the inner U-shaped steel 10 to undergo shear deformation through the fixing bolts. As the vertical displacement amplitude continues to increase, the fixing bolts sequentially drive the middle U-shaped steel 11 and the outer U-shaped steel 12 to move, thereby shear deformation occurs. Among the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12, as the amount of shear deformation increases, the shear stiffness of the connecting component 4 increases accordingly, which can provide a stronger shear resistance between the front floating plate ballast 1 and the rear floating plate ballast 2. At the same time, the high energy dissipation capacity of the connecting component 4 coupled by multiple energy dissipation mechanisms such as the friction of the steel wire of the wire rope ring 8, the metal deformation of the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12, and the friction between them can effectively reduce the adverse effects of kinetic energy.

[0039] The implementation methods of the present invention are not limited to these. According to the above-mentioned embodiments of the present invention, by using conventional technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention and without conflict, the above-mentioned preferred embodiments may also be modified, replaced or combined in various other forms, and the other embodiments obtained all fall within the scope of protection of the present invention.

Claims

1. A nonlinear connection system of a floating slab ballast with multiple defense lines, comprising a front floating slab ballast and a rear floating slab ballast, wherein a gap is formed between the front floating slab ballast and the rear floating slab ballast; Features: It also includes a connecting component, which is installed in the gap, and is used to connect the front floating plate track bed and the rear floating plate track bed. The connecting component includes a vibration isolation mechanism and a connecting mechanism. The vibration isolation mechanism is connected to the connecting mechanism, and the vibration isolation mechanism is connected to the front floating plate track bed and the rear floating plate track bed through the connecting mechanism. The vibration isolation mechanism is used to reduce the vibration of the front floating plate track bed and the rear floating plate track bed.

2. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 1, characterized in that: The vibration isolation mechanism comprises a connecting steel plate and a steel wire rope ring. The steel wire rope ring is formed by kneading a plurality of steel wires together. The connecting steel plate is rectangular and is provided with a connecting clamp. The steel wire rope ring passes through the connecting clamp.

3. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 2 is characterized by: The connecting mechanism includes an inner U-shaped steel, an intermediate U-shaped steel and an outer U-shaped steel, the inner U-shaped steel, the intermediate U-shaped steel and the outer U-shaped steel are stacked in sequence, and the sizes of the inner U-shaped steel, the intermediate U-shaped steel and the outer U-shaped steel increase in sequence, the inner U-shaped steel is connected to the connecting steel plate, and the outer U-shaped steel is connected to the front floating plate track bed and the rear floating plate track bed.

4. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 3 is characterized by: It also includes a fixed steel plate, which is rectangular and fixed to the connecting mechanism. The fixed steel plate is used to fix the connecting assembly to the gap. The front floating plate ballast and the rear floating plate ballast are provided with grooves corresponding to the fixed steel plates, and the grooves match the fixed steel plates.

5. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 4, characterized in that: The connecting steel plate is provided with a fixing hole 1, the fixing steel plate is correspondingly provided with a fixing hole 2, the inner U-shaped steel is provided with a long hole 1, the middle U-shaped steel is provided with a long hole 2, and the outer U-shaped steel is provided with a long hole 3. The fixing bolts are passed through the fixing hole 1, the long hole 1, the long hole 2, the long hole 3 and the fixing hole 2 in sequence to fix the connecting assembly to the gap.

6. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 5, characterized in that: The lengths of the first elongated hole, the second elongated hole and the third elongated hole increase sequentially.

7. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 5, characterized in that: The first fixing hole and the second fixing hole are concentrically arranged.

8. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 5, characterized in that: When the front floating plate ballast and the rear floating plate ballast are vibrated, the front floating plate ballast and the rear floating plate ballast are relatively displaced, and the fixed steel plate drives the connecting steel plate to move relative to each other through the fixing bolts, so that the wire rope ring is sheared and deformed to achieve vibration reduction. At this time, the fixing bolt moves within the length range of the long hole 1, and the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel do not change.

9. The nonlinear connection system of floating slab track bed with multiple defense lines according to claim 8, characterized in that: When the vibration of the front floating plate ballast and the rear floating plate ballast exceeds the shear deformation of the wire rope ring, the fixed steel plate drives the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel to move and shear deform in sequence through the fixing bolts, thereby increasing the shear resistance between the front floating plate ballast and the rear floating plate ballast.

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