Precast plate type vibration reduction rail structure for rail transit

Abstract

The invention relates to the technical field of rail transit, in particular to a rail transit prefabricated plate type vibration reduction rail structure which comprises a shield segment, a self-leveling layer, a bottom plate, a prefabricated plate, a rubber pad and a drainage groove. The self-leveling layer is arranged at the bottom of the shield segment, and the self-leveling layer is arranged in the length direction of the shield segment; the bottom plate is arranged at the top of the self-leveling layer; the prefabricated plate is arranged above the bottom plate and fixedly connected with the bottom plate through the limiting buttress, and the steel rail is arranged at the top of the prefabricated plate. The rubber pad is arranged between the bottom plate and the prefabricated plate, the top of the rubber pad makes contact with the bottom of the prefabricated plate, the bottom of the rubber pad makes contact with the top of the bottom plate, a plurality of water collecting grooves and water collecting cavities are formed in the rubber pad, and the water collecting grooves communicate with the water collecting cavities through water collecting pipes; according to the shield segment, self-drainage is achieved through vibration energy generated during vibration reduction and the drainage structure, and the service life of the vibration reduction component and part of fixing pieces is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transportation, and in particular to a prefabricated plate type vibration-damping track structure for rail transportation. Background Art

[0002] With the acceleration of urbanization, rail transit (subway, light rail, and urban rail) has become a key means of alleviating traffic pressure. However, the vibration and noise problems caused by rail transit operations are becoming increasingly prominent. These include environmental impacts: vibrations generated by wheel-rail contact are transmitted through the track foundation and soil, affecting the structural safety of buildings along the line (such as historical buildings and precision laboratories) and the living comfort of residents. Line densification: Lines in urban centers often pass through sensitive areas (residential and commercial areas, underground pipelines, etc.), making it difficult for traditional track structures to meet stringent vibration reduction requirements. Increased operating speeds: High-speed or heavy-load trains generate greater vibration energy, requiring more efficient vibration reduction technologies. This is particularly true in subway tunnels, where external factors (such as heavy rain or water seepage through walls) can increase humidity, significantly reducing the effectiveness of existing vibration reduction measures. Summary of the Invention

[0003] The purpose of the present invention is to provide a prefabricated plate-type vibration-damping track structure for rail transit to improve the above-mentioned problem. To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows:

[0004] The present application provides a rail transit prefabricated plate type vibration-damping track structure, which includes a shield segment, a self-leveling layer, a base plate, a prefabricated plate, a rubber pad and a drainage trough; the self-leveling layer is arranged at the bottom of the shield segment, and the self-leveling layer is arranged along the length direction of the shield segment; the base plate is arranged on the top of the self-leveling layer; the prefabricated plate is arranged above the base plate, and the prefabricated plate and the base plate are fixedly connected by limiting piers, and a steel rail is arranged on the top of the prefabricated plate; the rubber pad is arranged between the base plate and the prefabricated plate, the top of the rubber pad contacts the bottom of the prefabricated plate, and the bottom of the rubber pad contacts the top of the base plate, and a number of water collecting troughs and water collecting cavities are provided on the rubber pad, and the water collecting troughs and the water collecting cavities are connected through water collecting pipes; the drainage troughs are arranged on the side walls of the shield segment, and the drainage troughs are connected with the water collecting cavities through drainage pipes.

[0005] Optionally, the water collecting groove is a V-shaped groove, the bottom of the V-shaped groove is an arc curve, and the V-shaped grooves are arranged in an array along the length direction of the rubber pad.

[0006] Optionally, the inner wall of the water collecting tank is provided with a first hydrophobic coating.

[0007] Optionally, the contact angle of the first hydrophobic coating gradually decreases from the middle to both sides of the water collection groove.

[0008] Optionally, the prefabricated plate is provided with a fastener, and the rail is fixedly connected to the prefabricated plate via the fastener. A plurality of nipples are provided on the surface of the fastener, and the nipples are arranged in an array.

[0009] Optionally, a second hydrophobic coating is provided on the surface of the fastener.

[0010] Optionally, a hydrophilic layer is provided on the inner wall of the water collecting pipe, and a hydrophilic layer is provided at the connection point between the water collecting pipe and the water collecting cavity.

[0011] Optionally, nano-silicon columns are provided in the water collection chamber, and the nano-silicon columns are arranged in an array toward the drain pipe.

[0012] Optionally, the water collecting chamber is an arc-shaped structure.

[0013] Optionally, the width of the water collection groove is 40-50 μm, and the depth of the water collection groove is 150-200 μm.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a water collection trough and a water collection cavity on the rubber pad, and triggers the deformation of the rubber pad through the vibration of the track to produce a micro-scale pulsating pump effect. Combined with the special structure of the water collection trough, the coupled conversion of vibration energy and fluid kinetic energy is realized, and the accumulated water is efficiently discharged, thereby reducing the erosion of the track structure by water and reducing the risk of track damage caused by water. At the same time, the rubber pad can absorb and disperse vibration energy, and its deformation during the drainage process also plays an additional vibration reduction role, which significantly enhances the vibration reduction performance of the track structure and extends the service life of the vibration reduction components and some fixings.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the embodiments of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is an axonometric view of the prefabricated plate-type vibration-damping track structure for rail transit described in an embodiment of the present invention.

[0019] Figure 2It is a front view of the prefabricated plate-type vibration-damping track structure for rail transit according to an embodiment of the present invention.

[0020] Figure 3 2 is a side sectional view of the fastener according to an embodiment of the present invention.

[0021] Figure 4 for Figure 3 A magnified view of node A.

[0022] Figure 5 It is a front cross-sectional view of the rubber pad in an embodiment of the present invention.

[0023] Figure 6 2 is a side cross-sectional view of the rubber pad according to an embodiment of the present invention.

[0024] Markings in the figure: 1. Shield segment; 2. Self-leveling layer; 3. Base plate; 4. Precast plate; 5. Fasteners; 6. Rails; 7. Drain pipe; 8. Limit pier; 9. Drain trough; 10. Rubber pad; 11. Nipple; 12. Water collecting trough; 13. Water collecting pipe; 14. Water collecting cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0027] like Figure 1 and Figure 2As shown, this embodiment provides a rail transit prefabricated plate type vibration-damping track structure, which includes a shield segment 1, a self-leveling layer 2, a bottom plate 3, a prefabricated plate 4, a rubber pad 10 and a drainage trough 9; the self-leveling layer 2 is arranged at the bottom of the shield segment 1, and the self-leveling layer 2 is arranged along the length direction of the shield segment 1; the bottom plate 3 is arranged on the top of the self-leveling layer 2; the prefabricated plate 4 is arranged above the bottom plate 3, and the prefabricated plate 4 is fixedly connected to the bottom plate 3 by a limiting pier 8, and a steel rail 6 is arranged on the top of the prefabricated plate 4; the rubber pad 10 is arranged between the bottom plate 3 and the bottom plate 3. Between the prefabricated panels 4, the top of the rubber pad 10 contacts the bottom of the prefabricated panels 4, and the bottom of the rubber pad 10 contacts the top of the base plate 3. The rubber pad 10 is provided with a plurality of water collecting troughs 12 and water collecting cavities 14, and the water collecting troughs 12 and the water collecting cavities 14 are connected through water collecting pipes 13; the drainage troughs 9 are provided on the side walls of the shield segments 1, and the drainage troughs 9 are connected to the water collecting cavities 14 through drainage pipes 7. In the rail transit prefabricated plate type vibration-damping track structure of the present invention, when the train passes over the rails 6, the track vibration will be caused, and the vibration will be transmitted to the rubber pad 10 under the prefabricated panels 4. Since the rubber pad 10 has elastic properties, it will produce a corrugated deformation similar to a sine wave or a sawtooth structure under the action of periodic pressure. This corrugated deformation will cause the water collecting cavity 14 inside the rubber pad 10 to change in volume with the vibration frequency. When water collection chamber 14 is compressed, the pressure inside it increases, forcing water to flow through drain pipe 7 and into drain trough 9. When the deformation recovers, that is, when water collection chamber 14 expands, negative pressure forms inside the chamber, drawing water from water collection trough 12 through water collection pipe 13, thus creating a periodic pulsating effect similar to a "peristaltic pump." This effect greatly enhances drainage efficiency, allowing seepage water to be quickly drawn into water collection chamber 14 and then discharged into drain trough 9 through drain pipe 7. This significantly shortens the residence time of water in the track structure and effectively reduces the risk of track damage caused by water accumulation.

[0028] Furthermore, the ingenious design of the rubber pad 10 not only absorbs and disperses vibration energy, but also provides additional vibration damping through deformation during drainage. Furthermore, this improved drainage efficiency prevents the rubber pad 10 from being exposed to moisture for extended periods, preventing hydrolysis of the polymer material and a reduction in its elastic modulus and damping performance, thereby effectively maintaining the vibration damping effect of the rubber pad 10.

[0029] like Figure 6As shown, in a specific embodiment of the present disclosure, the water collecting trough 12 is a V-shaped groove, the bottom of the V-shaped groove is an arc curve, the V-shaped grooves are arranged in an array along the length direction of the rubber pad 10, and the inner wall of the water collecting trough 12 is provided with a first hydrophobic coating. The combination of the V-shaped structure of the water collecting trough and the first hydrophobic coating has a directional diversion effect, which further improves the targetedness and efficiency of drainage. It should be noted that the bottom of the V-shaped groove is an arc curve, so that a smooth transition area is formed inside the water collecting trough 12, reducing the resistance and turbulence of water during the flow process. When seepage water enters the sump 12, it can flow smoothly along the bottom of the arc curve and be more easily sucked into the sump cavity 14 by the sump pipe 13, which not only improves the drainage efficiency, but also reduces the accumulation and retention of water in the sump 12, further reducing the risk of water erosion on the track structure. At the same time, the arc curve design can better disperse and withstand the impact force from the track vibration, reducing the risk of damage or deformation of the sump 12 due to vibration, so that the sump 12 can maintain its original shape and function during long-term use, thereby extending the service life of the track structure.

[0030] like Figure 5 As shown, in a specific embodiment of the present disclosure, the contact angle of the first hydrophobic coating gradually decreases from the middle to the two sides of the water collecting trough 12. The size of the contact angle directly affects the flow behavior of water on the surface of the hydrophobic coating. By increasing the contact angle in the middle of the water collecting trough 12, the seeping water can be subjected to a greater repulsive force in the middle of the water collecting trough 12. The contact angle gradually decreases from the middle to the two sides, making it easier for the seeping water to flow along the curved bottom of the water collecting trough 12 to the two ends, and finally be sucked into the water collecting cavity 14 through the water collecting pipe 13, which not only improves the drainage efficiency, but also reduces the accumulation of water in the water collecting trough 12, further reducing the risk of erosion of the track structure.

[0031] like Figure 3 and Figure 4As shown, in a specific embodiment of the present disclosure, a fastener 5 is provided on the prefabricated plate 4, and the steel rail 6 is fixedly connected to the prefabricated plate 4 through the fastener 5. A plurality of nipples 11 are provided on the surface of the fastener 5, and the nipples 11 are arranged in an array. The surface of the fastener 5 is provided with a second hydrophobic coating. Through the design of the nipples 11, a rough morphology similar to the surface of a lotus leaf is formed on the surface of the fastener 5. At the same time, the second hydrophobic coating is applied, so that when the water flow contacts the surface of the fastener 5, it cannot form stable droplets, but slides down quickly like dewdrops on a lotus leaf, which not only reduces the risk of corrosion and damage caused by water accumulation, but also improves the drainage efficiency of the fixed structure. In addition, when the steel rail 6 vibrates, the water droplets will bounce on the surface of the super-hydrophobic fastener, which not only accelerates the separation of the water droplets from the surface of the fastener 5, but also enables the water droplets to obtain additional kinetic energy during the bouncing process, thereby flowing to the drainage trough 9 faster. It can be understood that the protrusion 11 has a protrusion height of 15-20 μm and a spacing of 40-50 μm. By limiting the parameters such as the size of the protrusion 11, the water flow will be guided to quickly drain away along the longitudinal direction of the track during the sliding process, effectively avoiding the accumulation of water in the fastener 5 and its surrounding areas.

[0032] In a specific embodiment of the present disclosure, the inner wall of the water collecting pipe 13 is provided with a hydrophilic layer, and the connection between the water collecting pipe 13 and the water collecting chamber 14 is provided with a hydrophilic layer. When the micro-droplets enter the water collecting pipe 13, they are rapidly spread into a continuous liquid film due to the strong capillary adsorption of the hydrophilic layer on the inner wall, and are peristaltically transported along the pipe wall toward the water collecting chamber 14. The wettability mutation (Janus effect) at the hydrophilic-hydrophobic interface forms a unidirectional diversion threshold to prevent backflow. The vibration of the subway causes the rubber pad 10 to deform periodically, driving the wall of the water collecting chamber 14 to compress and rebound (volume change rate ±15%), forming a pulsating micropump. When the water collecting chamber 14 is pressurized, the internal pressure increases, and a Venturi effect is formed at the outlet of the drain pipe 7. The water flow is sucked out at high speed and flows to the drainage trough 9 through the drain pipe 7. When the rubber pad 10 rebounds, the negative pressure in the water collecting chamber 14 adsorbs the liquid film in the water collecting pipe 13, forming a continuous flow cycle. It should be noted that the hydrophilic layer can significantly increase the affinity of water to the inner wall of the water collection pipe and its connections, allowing water to be quickly adsorbed and directed into the water collection chamber 14 when it contacts these areas. This feature is particularly important under the vibration-enhanced drainage mechanism, because when water droplets bounce on the surface of the super-hydrophobic fastener, the hydrophilic layer can ensure that the water droplets are immediately directed into the water collection pipe 13 once they contact it, thereby reducing the time the water droplets stay on the surfaces of the fastener 5 and the rail 6, further improving drainage efficiency.

[0033] In a specific embodiment of the present disclosure, nano-silicon pillars are provided in the water collection chamber 14, and the nano-silicon pillars are arranged in an array toward the drain pipe 7. The nano-silicon pillars and the hydrophobic coating cooperate to form a submicron air cushion layer, forcing the droplets to suspend on the top of the pillars in a Cassie-Baxter state, reducing the solid-liquid contact area; the directional arrangement of the nano-silicon pillar array induces the liquid film to move along a specific path, generates a capillary pressure difference through the structural gradient, and drives the water flow to converge at the mouth of the drain pipe 7. Periodic vibration causes the liquid film to break into micro-droplets. The sharp edges of the nano-silicon pillars concentrate local stress, weaken the adhesion of the droplets, make them easier to detach from the surface, and accelerate them into the drain pipe 7 through the vibration inertia force, reducing the residue in the cavity. It can be understood that the nano-silicon pillars are cylindrical, and the non-angular surface of the cylindrical nanostructure can significantly reduce the flow resistance of the liquid film. The curved edge of the cylinder avoids the turbulence or eddy current caused by the corners, making it easier for the droplets to move along the surface under vibration or capillary action, reducing the flow dead zone. At the same time, under high-frequency vibration, the non-angular geometric characteristics of the cylinder can evenly disperse the external pressure (such as vibration impact) to the entire cylinder, while the corners of the square pillar are prone to stress concentration, resulting in breakage or deformation of the nanostructure, affecting the traction and guidance of the liquid. The cylindrical surface has a lower wear rate in long-term vibration and can maintain long-term stable drainage performance.

[0034] In a specific embodiment of the present disclosure, the water collecting chamber 14 is an arc-shaped structure. The arc-shaped water collecting chamber 14 can guide the water flow more naturally, reduce the collision and eddy current of the water flow in the water collecting chamber, and make the water flow more smoothly to the drainage outlet, which helps to improve the drainage efficiency and ensure that the accumulated water on the track can be quickly removed.

[0035] In a specific embodiment of the present disclosure, the width of the water collection trough 12 is 40-50 μm, and the depth of the water collection trough 12 is 150-200 μm. By designing the size of the water collection trough 12, when the track vibration triggers the deformation of the rubber pad, a more significant Laplace pressure difference can be formed inside the water collection trough, which can more effectively drive the seepage water to flow along the inner wall of the water collection trough and quickly enter the water collection cavity through the water collection pipe, thereby reducing the residence time of water molecules in the water collection trough and further improving the drainage efficiency.

[0036] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0039] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can

[0040] Any changes or substitutions that can be easily imagined within the scope of the present invention should be included in the protection scope of the present invention.

[0041] Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A prefabricated plate type vibration-damping track structure for rail transit, characterized in that: include: Shield segment (1); A self-leveling layer (2), the self-leveling layer (2) being arranged at the bottom of the shield segment (1), and the self-leveling layer (2) being arranged along the length direction of the shield segment (1); A bottom plate (3), the bottom plate (3) being arranged on top of the self-leveling layer (2); A prefabricated plate (4), the prefabricated plate (4) being arranged above the base plate (3), the prefabricated plate (4) being fixedly connected to the base plate (3) via a limiting pier (8), and a steel rail (6) being arranged on the top of the prefabricated plate (4); A rubber pad (10), the rubber pad (10) being arranged between the base plate (3) and the prefabricated plate (4), the top of the rubber pad (10) being in contact with the bottom of the prefabricated plate (4), the bottom of the rubber pad (10) being in contact with the top of the base plate (3), the rubber pad (10) being provided with a plurality of water collecting troughs (12) and water collecting cavities (14), the water collecting troughs (12) and the water collecting cavities (14) being in communication with each other through a water collecting pipe (13); A drainage trough (9), wherein the drainage trough (9) is arranged on the side wall of the shield segment (1), and the drainage trough (9) is connected to the water collecting chamber (14) through a drainage pipe (7).

2. The rail transit prefabricated plate type vibration-damping track structure according to claim 1, characterized in that: The water collecting groove (12) is a V-shaped groove, the bottom of the V-shaped groove is an arc curve, and the V-shaped grooves are arranged in an array along the length direction of the rubber pad (10).

3. The rail transit prefabricated plate type vibration-damping track structure according to claim 2, characterized in that: The inner wall of the water collecting tank (12) is provided with a first hydrophobic coating.

4. The rail transit prefabricated plate type vibration-damping track structure according to claim 3, characterized in that: The contact angle of the first hydrophobic coating gradually decreases from the middle to both sides of the water collecting groove (12).

5. The rail transit prefabricated plate type vibration-damping track structure according to claim 1, characterized in that: The prefabricated plate (4) is provided with a fastener (5), and the rail (6) is fixedly connected to the prefabricated plate (4) via the fastener (5). A plurality of nipples (11) are provided on the surface of the fastener (5), and the nipples (11) are arranged in an array.

6. The rail transit prefabricated plate type vibration-damping track structure according to claim 5, characterized in that: The surface of the fastener (5) is provided with a second hydrophobic coating.

7. The prefabricated plate type vibration-damping track structure for rail transit according to claim 1, characterized in that: The inner wall of the water collecting pipe (13) is provided with a hydrophilic layer, and the connection point between the water collecting pipe (13) and the water collecting chamber (14) is provided with a hydrophilic layer.

8. The rail transit prefabricated plate type vibration-damping track structure according to claim 1, characterized in that: Nano silicon columns are arranged in the water collection chamber (14), and the nano silicon columns are arranged in an array in the direction of the drainage pipe (7).

9. The rail transit prefabricated plate type vibration-damping track structure according to claim 1, characterized in that: The water collecting chamber (14) is an arc-shaped structure.

10. The rail transit prefabricated plate type vibration-damping track structure according to claim 1, characterized in that: The width of the water collecting trough (12) is 40-50 μm, and the depth of the water collecting trough (12) is 150-200 μm.

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