CN117721671A - Embedded track structure suitable for existing subway vibration damping and noise reduction transformation - Google Patents

Abstract

The invention discloses an embedded track structure suitable for the vibration and noise reduction renovation of existing subway lines, which includes an iron pad, an elastic pad, a lower foundation, a track plate, a steel rail, a filling component, a buffer component, a rubber pad, and a lock. Tightening components, connecting components, fastening components and limiting components, the top of the lower foundation is provided with a base plate. The invention utilizes the bolt holes of the elastic fastener system of the existing lines of urban rail transit to install the embedded track on the track bed or rail bearing platform of the existing line through anchor bolts, without the need to adjust and install the track bed and track plate of the existing line. Simple and efficient. Using polymer materials to continuously support and lock the rails to achieve vibration and noise reduction transformation reduces environmental vibration pollution caused by train driving, and improves the lateral vibration damping effect of the rails. It can better suppress lateral vibrations in curve sections, and has better The service performance increases the service life of the track structure and ensures the safety of train operation.

Description

An embedded track structure suitable for vibration and noise reduction renovation of existing subways

Technical field

The present invention relates to the technical field of rail transit, and in particular to an embedded track structure suitable for the vibration and noise reduction renovation of existing subways.

Background technique

Urban rail transit has been regarded as the preferred mode of transportation by the general public because of its advantages such as convenience and comfort. With the rapid advancement of new urbanization and the priority development of public transportation in cities, it has entered a stage of rapid development and presented a rare situation in the world. Speed and scale, but at the same time, environmental vibration along the line and indoor secondary structural noise in buildings caused by train operation have attracted people's attention. In recent years, relevant scholars have conducted a lot of research on vibration and noise caused by subways. Combined with actual field tests, it can be found that the environmental vibration caused by subways is mainly low frequency. The main frequency of environmental vibration caused by trains running on viaducts is roughly 10 to 120Hz. The main frequency of environmental vibration caused by driving in a tunnel is roughly 0 to 40Hz. There are many measures to reduce vibration and noise in domestic subways. According to the vibration source, vibration reduction can be divided into three categories: medium vibration reduction, high vibration reduction and special vibration reduction. Medium vibration reduction mainly uses elastic fasteners, and high vibration reduction includes elastic sleepers, vibration damping Pad floating board, etc. Special vibration damping includes steel spring floating board track bed, rubber pad floating board track bed, etc.

Among the existing vibration reduction and noise reduction measures, compared with ordinary subway track structures, the vibration reduction effect of medium vibration reduction is 3 to 6dB, the vibration reduction effect of high vibration reduction is 5 to 10dB, and the vibration reduction effect of special vibration reduction is more than 10dB. , as people's requirements for environmental noise increase, traditional vibration reduction methods cannot meet the needs. The steel spring floating plate has a damping effect on vibrations with a vibration frequency greater than 10Hz. The vibration-absorbing pad floating plate can only dampen vibrations with a vibration frequency greater than 25Hz. It mainly plays a good damping effect on medium and high frequency vibrations. The human body is sensitive to vibrations in the 0-80Hz frequency band. When the vibration frequency is close to the natural frequency of the human body, resonance will occur, causing harm to the human body. Embedded rails are widely used in trams, and their vibration reduction effect on vibration noise in the 1-80Hz frequency band can reach 12dB. For sections of existing subway lines where vibration and noise exist, traditional vibration reduction measures are used, which results in slow construction speed, prone to front and rear slopes, and poor vibration reduction performance.

In summary, in order to solve the problem of vibration reduction and noise reduction renovation of existing subway lines, and fully considering the advantages of embedded track vibration reduction and noise reduction, an embedded track suitable for vibration reduction and noise reduction renovation of subway was designed, which has a good vibration reduction effect. , can dampen low-frequency vibrations, and facilitate construction and installation.

Contents of the invention

The purpose of the present invention is to solve the shortcomings in the existing technology and propose an embedded track structure suitable for the vibration and noise reduction renovation of the existing subway.

In order to achieve the above objects, the present invention adopts the following technical solutions:

An embedded track structure suitable for the renovation of existing subway vibration and noise reduction, including iron pads, elastic pads, lower foundations, track plates, rails, filling components, buffer components, rubber pads, locking components, and connection components , fastening components and limiting components, the top of the lower foundation is provided with a base plate, the top of the base plate is provided with self-compacting concrete, the track plate is fixedly installed on the top of the self-compacting concrete, the track plate Two rail-bearing platforms with standard gauge are symmetrically arranged. Buffer assemblies are provided on the top surfaces of the two rail-bearing platforms. Iron backing plates are provided on the tops of multiple buffer assemblies. The iron backing plates Rubber pads are provided on both sides, and a plurality of the limit components are located at symmetrical positions on both sides of the iron pad plate. The rubber pads are located between the iron pad plate and the limit components, and the iron pad plate, the rubber pad and the limit components are A filling cavity is formed between the positioning components, the rail is located at the symmetry axis of the limiting component, and an elastic pad is provided under the rail. The filling component fills the remaining space of the filling cavity, and the fastening components are arranged on both sides of the limiting component. side, and connecting components and locking components are provided between the fastening component and the adjacent limiting component. The iron pad, elastic pad, rail, filling component, buffer component, rubber pad, locking component, The connecting components, fastening components and limiting components are all fixedly installed on the track plate.

Preferably, the limiting component is a steel plate with a thickness of 3 mm.

Preferably, the fastening component is an anchor bolt, and the material of the anchor bolt is high-quality carbon structural steel or alloy steel.

Preferably, the connecting component is a spring washer, and the material of the spring washer is 60Mn or 60Si ₂ Mn.

Preferably, the locking component is an interlocking cover plate, and the material of the interlocking cover plate is QT450-10.

Preferably, the thickness of the rubber pad is 1 mm, and the buffer component is an insulating buffer plate. The material of the insulating buffer plate is rubber and plastic and the thickness is 6 mm.

Preferably, the filling component is a polymer material. Because polyurethane has the advantages of good vibration and noise reduction performance, low natural frequency and good durability, polyurethane is selected as the polymer material in the present invention.

Preferably, the elastic pad is a grooved pad made of rubber material.

Preferably, the iron backing plate is QT450-10 traditional sand gravity casting.

Compared with the prior art, the beneficial effects of the present invention are:

1. By optimizing the design of traditional embedded rails, using limit components, filling components, rubber pads, elastic pads, iron pads and rails to form a new embedded rail structure, expanding the types of embedded rails, and utilizing the elasticity of existing lines. The bolt holes of the fastener system are used to install the embedded rail structure on the track plate through fastening components, which facilitates on-site replacement by the public works department, improves the efficiency of vibration and noise reduction renovation of existing lines, and reduces the impact on the operation of existing lines.

2. There are two limit components, and a filling cavity is formed between the two limit components. There is a rail in the filling cavity. The rail is tightly wrapped by the filling assembly in the filling cavity. The rail is continuously supported and fixed when the train is running. At this time, the rail will not undergo secondary deflection, and the lateral vibration damping performance of the curved section of the track will be enhanced, the service life of the rail will be extended, and the operation and maintenance costs will be reduced.

3. The filling component of the embedded rail structure is polyurethane, which forms a transitional damping zone between the rail and the limit component, slows down the transmission of vibration, and improves the service life of the embedded rail structure. The embedded rail structure is installed through fastening components. On the track plate, an insulating buffer pad is set between the embedded rail structure and the track plate, which increases the contact area, ensures the stability of transmission, and plays a buffering role to reduce vibration transmission. The embedded track has a positive impact on the vibration transmission of the rail when the train is running. Layer-by-layer vibration reduction achieves good vibration reduction effect and wide vibration reduction spectrum, reducing vibration in the surrounding environment.

Description of the drawings

Figure 1 is a cross-sectional view of an embedded track structure proposed by the present invention that is suitable for the vibration and noise reduction renovation of existing subways.

Figure 2 is a cross-sectional view of an embedded track structure proposed by the present invention that is suitable for the vibration and noise reduction renovation of existing subways.

Figure 3 is a schematic diagram of an embodiment of an embedded track structure proposed by the present invention suitable for the vibration and noise reduction renovation of existing subways.

Figure 4 is a schematic diagram of an embedded track structure proposed by the present invention that is suitable for the vibration and noise reduction renovation of existing subways.

Figure 5 is a three-dimensional schematic diagram of an embedded track structure proposed by the present invention that is suitable for the vibration and noise reduction renovation of existing subways.

In the picture: 1 limit component, 2 fastening component, 3 connection component, 4 locking component, 5 rubber pad, 6 buffer component, 7 filling component, 8 rail, 9 filling cavity, 10 track plate, 11 rail bearing platform, 12 self-compacting concrete, 13 base plate, 14 lower foundation, 15 elastic pad, 16 iron pad.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention.

Referring to Figures 1 to 5, an embedded track structure suitable for the vibration and noise reduction renovation of the existing subway includes an iron backing plate 16, an elastic backing plate 15, a lower foundation 14, a track plate 10, a rail 8, and a filling component 7 , buffer component 6, rubber pad 5, locking component 4, connecting component 3, fastening component 2 and limiting component 1. The top of the lower foundation 14 is provided with a base plate 13, and the top of the base plate 13 is provided with a self-compacting concrete 12 , the track plate 10 is fixedly installed on the top of the self-compacting concrete 12. Two rail bearing platforms 11 with standard gauge are symmetrically arranged on the track plate 10. Buffer assemblies 6 are provided on the top surfaces of the two rail bearing platforms 11. The tops of the plurality of buffer components 6 are provided with iron pads 16, and rubber pads 5 are provided on both sides of the iron pads 16. The plurality of limiting components 1 are respectively located at symmetrical positions on both sides of the iron pads 16, and the rubber pads 5 are located on Between the iron backing plate 16 and the limiting component 1, the limiting component 1, the iron backing plate 16 and the rubber pad 5 form a filling cavity 9. The filling cavity 9 is provided with a rail 8, and the rail 8 is located on the symmetry axis of the limiting component 1. at, and the rail bottom of the rail 8 is provided with an elastic pad 15, the filling assembly 7 fills the remaining space of the filling cavity 9, and supports and locks the rail 8, the fastening assembly 2 is arranged on both sides of the limiting assembly 1, and the fastening assembly 2 and the adjacent limiting component 1 are provided with a connecting component 3 and a locking component 4, an iron pad 16, an elastic pad 15, a rail 8, a filling component 7, a buffer component 6, a rubber pad 5, and a locking component. The component 4, the connecting component 3, the fastening component 2 and the limiting component 1 are all fixedly installed on the track plate 10.

In the present invention, the limiting component 1 is a steel plate with a thickness of 3 mm, and the iron backing plate 16 is QT450-10 traditional sand mold gravity casting. The steel plate and the iron backing plate 16 mainly provide the filling cavity 9 for the filling component 7 and place the rail 8 in the filling chamber. In the cavity 9, the filling assembly 7 can continuously support and fix the rail 8, ensuring the stability and safety of the rail, and playing the role of vibration and noise reduction.

In the present invention, the thickness of the rubber pad 5 is 1 mm. As a commonly used connecting piece, the rubber pad 5 mainly forms an elastic transition zone between the limiting component 1 and the iron pad 16 to improve the relationship between the limiting component 1 and the iron pad under the action of vibration load. The vibration transmission of the plate 16 prolongs the service life of the limiting component 1 and the iron backing plate 16 and avoids wear caused by direct contact.

In the present invention, the fastening component 2 is an anchor bolt. The material of the anchor bolt is high-quality carbon structural steel or alloy steel. The anchor bolt is a fastener composed of a head and a screw rod. It is usually used in conjunction with a nut. Tightly connect two parts with through holes. The role of anchor bolts in the track is mainly to fix the embedded rail 8 on the track plate 10 and ensure the stability and safety of the track. In track installation, the anchor bolts The steel bars to be connected are anchored to the hardened track plate 10 to form a stable track structure, ensuring the safety and smoothness of trains or vehicles. At the same time, the anchor bolts have good fatigue resistance and are less prone to damage during service. Less, greatly reducing operation and maintenance costs.

It is worth noting that in Figure 2, the position of fastening component 2 corresponds to the hole positions of two different fastener systems. The group closer to the rail 8 is the hole position of the III-type elastic bolt, and the other group is the hole position of the W-type elastic bolt. The hole position can be processed later according to needs. That is to say, the structure of this application can be made without drilling holes first, and then holes can be drilled according to the existing fastener system.

In the present invention, the connecting component 3 is a spring washer. The material of the spring washer is 60Mn or 60Si ₂ Mn. 60Mn or 60Si ₂ Mn has high strength, hardness, wear resistance and toughness. The main function of the spring washer is to effectively absorb And disperse the vibration and impact between the anchor bolts and the interlocking cover plate when the train is running, reduce the damage and destruction of the anchor bolts and the interlocking cover plate, and extend the service life of the embedded track.

In the present invention, the locking component 4 is an interlocking cover plate, and the interlocking cover plate is made of QT450-10. QT450-10 is a high-strength, high-hardness, and high-toughness ductile iron with excellent mechanical properties and durability. Abrasive, the interlocking cover plate made of QT450-10 material in the track is mainly to protect the sending and receiving equipment of the track circuit, ensure the safety and reliability of railway transportation, and is used to prevent trains or vehicles from not carrying out corresponding signal light inspections. Or enter the track without permission, the interlocking cover is interconnected with the control system of the track circuit to ensure that at any time, the sending and receiving equipment of the track circuit are completely covered and will not be subject to any interference or damage. , when a train or vehicle approaches the track, the interlocking cover will automatically open to allow the train or vehicle to pass, while ensuring that the sending and receiving equipment of the track circuit is not affected.

In the present invention, the elastic pad 15 is a grooved pad made of rubber material, and the buffer component 6 is an insulating buffer plate. The insulating buffer pad is made of rubber and plastic and has a thickness of 6 mm. The insulating elastic pad 15 and the insulating buffer pad The function of the plate in the track is mainly to reduce the overall stiffness of the track, buffer the high-speed impact vibration generated when vehicles pass by, protect the track plate 10, and electrically insulate the signal system, and the rubber-plastic material pad has good aging resistance and cold resistance. Thermal performance, long service life.

In the present invention, the filling component 7 is a polymer compound polyurethane. Polyurethane has significant advantages such as wide vibration reduction spectrum, good vibration reduction effect, and long service life. During the filling operation, it is necessary to reduce the gap between the polyurethane and the filling cavity 9 to avoid With the emergence of bubble cavities, the polyurethane is deformed by the train load transmitted by the rail 8, and the internal physical bonds are partially dissociated, resulting in a reduction in its natural frequency. Materials with low natural frequencies can produce severe vibrations through resonance effects when processing sound waves of similar frequencies. Internal friction, thereby efficiently converting sound energy into heat energy, achieving low-frequency vibration reduction and noise reduction, thereby reducing low-frequency environmental vibration and noise caused by urban rail transit.

The detailed working process of the present invention is as follows:

From top to bottom, the track structure consists of rail 8, filling component 7, limiting component 1, fastening component 2, connecting component 3, locking component 4, pad 5, buffer component 6, track plate 10, self-compacting concrete 12 , base plate 13, lower foundation 14, elastic pad 15 and iron pad 16. The top of the lower foundation 14 is provided with a base plate 13, and the top of the base plate 13 is provided with self-compacting concrete 12. The track plate 10 is fixedly installed on the top of the self-compacting concrete 12. Two bearings with standard gauges are symmetrically arranged on the track plate 10. Rail platform 11, two rail-supporting platforms 11 are provided with buffer components 6 on the top surface, multiple buffer components 6 are provided with iron backing plates 16 on the top, and rubber pads 5 are provided on both sides of the iron backing plate 16 to limit the position. The components 1 are respectively arranged on the rubber pads 5, and a filling cavity 9 is formed between the iron backing plate 16, the rubber pad 5 and the limiting component 1. The rail 8 is located at the symmetry axis of the limiting component 1, and there is an elastic spring underneath the rail 8. The backing plate 15 and the filling component 7 fill the remaining space of the filling cavity 9. The fastening components 2 are arranged on both sides of the limiting component 1, and the fastening component 2 and the adjacent limiting component 1 are provided with connecting components 3 and locks. Tighten the component 4 so that the iron pad 16, the elastic pad 15, the rail 8, the filling component 7, the buffer component 6, the rubber pad 5, the locking component 4, the connecting component 3, the fastening component 2 and the limiting component 1 are fixedly installed. on track plate 10.

The above is only a specific implementation mode of the present invention, but it should not be understood as limiting the patent scope of the present invention. It should be noted that any person familiar with the technical field can make equivalent substitutions or changes based on the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and these all fall within the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (9)

1. The utility model provides an embedded track structure suitable for improvement of making an uproar falls in existing subway damping, its characterized in that includes iron backing plate (16), elastic backing plate (15), lower part basis (14), track board (10), rail (8), filling component (7), buffer unit (6), rubber pad (5), locking subassembly (4), linking subassembly (3), fastening component (2) and spacing subassembly (1), the top of lower part basis (14) is equipped with bed plate (13), the top of bed plate (13) is equipped with self-compaction concrete (12), track board (10) fixed mounting is at the top of self-compaction concrete (12), two rail bearing platforms (11) of standard track gauge are provided with on track board (10), two all be equipped with buffer unit (6) on the top surface of rail bearing platform (11), a plurality of buffer unit (6) top all is equipped with iron backing plate (16), iron backing plate (16) both sides all are equipped with rubber pad (5), a plurality of spacing subassembly (1) are located the both sides symmetry position of iron backing plate (16) respectively, iron backing plate (16) and spacing subassembly (1) are located between the spacing subassembly (1) and the spacing rubber pad (1), the steel rail (8) is located the symmetry axis department of spacing subassembly (1), and is equipped with elastic backing plate (15) under steel rail (8), fill subassembly (7) and fill cavity (9) surplus space, fastening component (2) set up in spacing subassembly (1) both sides, and all be equipped with between fastening component (2) and the adjacent spacing subassembly (1) and link up subassembly (3) and locking subassembly (4), iron backing plate (16), elastic backing plate (15), steel rail (8), fill subassembly (7), buffer module (6), rubber pad (5), locking subassembly (4), link up subassembly (3), fastening component (2) and spacing subassembly (1) all fixed mounting on track board (10).

2. An embedded track structure suitable for existing subway vibration and noise reduction reconstruction according to claim 1, wherein the limiting component (1) is a steel plate with the thickness of 3 mm.

3. The embedded track structure suitable for the vibration and noise reduction transformation of the existing subway according to claim 1, wherein the fastening component (2) is an anchor bolt, and the anchor bolt is made of high-quality carbon structural steel or alloy steel.

4. An embedded track structure suitable for existing subway vibration and noise reduction reconstruction according to claim 1, characterized in that the engagement assembly (3) is a spring washer made of 60Mn or 60Si ₂ Mn。

5. The embedded track structure suitable for vibration and noise reduction reconstruction of the existing subway according to claim 1, wherein the locking component (4) is an interlocking cover plate, and the interlocking cover plate is made of QT450-10.

6. The embedded track structure suitable for existing subway vibration and noise reduction transformation according to claim 1, wherein the thickness of the rubber pad (5) is 1mm, the buffer component (6) is an insulating buffer pad, and the insulating buffer pad is made of rubber and plastic and has a thickness of 6mm.

7. An embedded track structure suitable for existing subway vibration and noise reduction reconstruction according to claim 1, wherein the filling component (7) is high molecular compound polyurethane.

8. An embedded track structure suitable for vibration and noise reduction reconstruction of existing subways according to claim 1, characterized in that the resilient pads (15) are groove pads of rubber material.

9. An embedded track structure suitable for vibration and noise reduction reconstruction of existing subways according to claim 1, characterized in that the iron pad (16) is QT450-10 conventional sand gravity casting.