New vibration-damping ballast bed structure

Abstract

A new vibration-damping ballast bed structure, comprising a foundation (4), wherein the upper portion of the foundation (4) is of a convex arc shape, and drainage ditches (6) are provided at the junctions of two sides of the foundation (4) and the convex-arc-shaped portion, the bottoms of the drainage ditches (6) being lower than two side edges of the convex-arc-shaped portion of the foundation (4); a floating plate (1) arranged at the top of the foundation (4), wherein the lower portion of the floating plate (1) is of a concave arc shape; and several vibration isolators (3) configured to connect the foundation (4) and the floating plate (1). Each vibration isolator (3) comprises an outer sleeve (9), an inner sleeve (10) and a pre-buried bearing casing (11), wherein the outer sleeve (9) is a hollow cylinder and embedded in the floating plate (1), and a bearing block is provided in the outer sleeve (9); the pre-buried bearing casing (11) comprises a lower base and a casing, the casing being hollow, the lower portion of the casing being fixedly connected to the lower base, and the lower base being pre-buried inside the convex-arc-shaped portion of the foundation (4); and the inner sleeve (10) comprises a top plate, a spring and a lower bottom plate, the top plate being connected to the lower bottom plate by means of the spring, the lower bottom plate being connected to the lower base of the pre-buried bearing casing (11), and the top plate of the inner sleeve (10) being fitted and connected to the bearing block of the outer sleeve (9). By means of changing the shape of the foundation and providing drainage ditches on two sides and flange structures, a vibration-damping device drains water more easily and is not prone to experiencing water accumulation, blockages can be removed more conveniently, and smooth drainage is ensured.

Description

A new vibration-damping roadbed structure Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a novel vibration-damping track bed structure. Background Art

[0002] To address mobility challenges, urban rail transit is typically built in bustling, densely populated areas. This provides significant convenience, but the vibrations generated by the vehicles also cause significant vibration pollution. Current approaches to addressing vibration pollution include standard, medium, advanced, and special vibration reduction. While these vibration reduction methods achieve their intended purpose, they also present numerous drawbacks and shortcomings: central drainage channels can be difficult to drain, silt and calcifications can easily accumulate in them, long-term water immersion of rubber pads can affect their service life and damping effectiveness, and corrosion of steel spring sleeves and shock absorbers can occur. Technical issues

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the existing technology and provide a new vibration-damping roadbed structure which solves the problems of rust of the vibration-damping device, drainage difficulty of the drainage ditch, and easy clogging of the drainage ditch by changing the shape of the roadbed and the base. Technical Solutions

[0004] In order to achieve the above-mentioned purpose, a new vibration-damping roadbed structure is designed, including a base, the upper part of the base is convex arc-shaped, and drainage ditches are provided on both sides of the base at the junction of the convex arc and the base, and the bottom of the drainage ditch is lower than or slightly lower than the edges of the two sides of the convex arc of the base; a floating plate is arranged on the top of the base, and the lower part of the floating plate is concave arc-shaped; a plurality of vibration isolators are used to connect the base and the floating plate, the vibration isolators include an outer sleeve, an inner sleeve and a pre-embedded load-bearing casing, the outer sleeve is a hollow cylinder embedded in the floating plate, a load-bearing block is provided in the outer sleeve, the pre-embedded load-bearing casing includes a lower base and a casing, the interior of the casing is hollow, and the lower part is fixedly connected to the lower base, and the lower base is pre-embedded in the convex arc of the base, the inner sleeve includes a top plate, a spring and a lower bottom plate, the top plate and the lower bottom plate are connected by a spring, the lower bottom plate is connected to the lower base of the pre-embedded load-bearing casing, and the top plate of the inner sleeve is cooperatively connected to the load-bearing block of the outer sleeve.

[0005] The utility model also has the following preferred technical solutions:

[0006] 1. The lower end of the base is rectangular or arc-shaped.

[0007] 2. The drainage ditch is a rectangular hollow cuboid, and the upper part of the drainage ditch passes through the top of the floating plate and is provided with a ditch cover.

[0008] 3. A wing plate is provided at the upper middle position of the drainage ditch.

[0009] 4. The inner diameter of the outer sleeve is slightly larger than the outer diameter of the embedded load-bearing casing, and a bearing block is provided at the lower top of the outer sleeve.

[0010] 5. The upper end of the casing extends into the inner part of the outer sleeve inside the floating plate.

[0011] 6. Also includes a rubber pad, which is arc-shaped and embedded between the base and the floating plate.

[0012] 7. The floating slab is prefabricated and assembled by several unit slabs. The longitudinal reinforcement connection positions are connected by reinforcement connectors. After assembly, cast-in-place concrete is used. The unit slabs are connected by connecting hinges. Beneficial effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model changes the shape of the base and sets drainage ditches on both sides and wing plate structures, so that the vibration damping device is easier to drain, less likely to accumulate water, more convenient to clear blockages, and ensure smooth drainage.

[0015] 2. The utility model provides a pre-buried load-bearing casing to ensure that the steel spring is not soaked by collected water, thereby preventing the steel spring from rusting, increasing the service life of the vibration reduction device and improving the vibration reduction effect.

[0016] 3. The utility model utilizes the theory of prefabricated assembly structure to solve the problem of slow progress in the construction of special vibration-damping roadbeds and the problem of replacing damaged parts of floating plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the new structure of the rectangular interval steel spring floating plate of the utility model;

[0018] Figure 2 is a schematic diagram of the structure of the steel spring floating plate in the shield section of the utility model;

[0019] FIG3 is a schematic structural diagram of the utility model steel spring floating plate vibration isolator;

[0020] Figure 4 is a schematic diagram of the structure of the rubber pad with steel spring floating plate in rectangular intervals of the present invention;

[0021] Figure 5 is a schematic diagram of the structure of the steel spring floating plate rubber pad in the new tunnel section of the present invention;

[0022] Figure 6 is a schematic diagram of the floating plate mechanism type of the new shield section;

[0023] Figure 7 is a schematic diagram of the structure of the new rectangular interval floating plate of the present invention;

[0024] Figure 8 is a schematic diagram of the structure of the new rectangular interval vibration damping pad roadbed of the present invention;

[0025] Figure 9 is a schematic diagram of the vibration damping pad roadbed structure of the new shield tunnel section;

[0026] In the figure: 1. Floating plate; 2. Track; 3. Vibration isolator; 4. Base; 5. Wing plate; 6. Drainage ditch; 7. Cushion; 8. Rubber pad; 9. Outer sleeve; 10. Inner sleeve; 11. Embedded load-bearing casing; 12. Unit plate. Best Mode for Carrying Out the Invention

[0027] The present invention will be further described below with reference to the accompanying drawings. The structure and principle of the present invention will be very clear to those skilled in the art. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. Modes for Carrying Out the Invention

[0028] As shown in Figures 1 and 2, the utility model includes a base 4, a floating plate 1 and a vibration isolator 3. The lower end of the base 4 is rectangular or arc-shaped, and the upper part of the base 4 is set to a convex arc shape, the main function of which is to facilitate drainage of the base. Drainage ditches 6 are set at the junction of the two sides of the base 4 and the convex arc. The drainage ditch 6 is a rectangular hollow cuboid, the bottom of which is lower than or slightly lower than the two side edges of the convex arc of the base 4, and the upper part passes through the top of the floating plate 1 and is provided with a ditch cover. A wing plate 5 is set at the upper middle position of the drainage ditch 6, the main function of which is to keep the ditch unobstructed. The floating plate 1 is set at the top of the base, and the lower part is set to a concave arc shape, which mainly cooperates with the base. The vibration isolator 3 includes an outer sleeve 9, an inner sleeve 10 and a pre-buried load-bearing casing 11, which are used to connect the base and the floating plate. The main function is to reduce the amount of vibration, absorb and adjust the load transmitted from it, and achieve vibration reduction and noise reduction.

[0029] As shown in Figure 3, the outer sleeve 9 is a hollow cylinder embedded in the floating plate 1, and its inner diameter is slightly larger than the outer diameter of the embedded load-bearing casing 11. A bearing block is provided at the lower part of the top of the outer sleeve 9, the main function of which is to limit the movement of the inner sleeve. The embedded load-bearing casing 11 includes a lower base and a casing. The casing is hollow inside, and the lower part is fixedly connected to the lower base. The lower base is embedded in the convex arc inside the base 4 and is 100mm higher than the concrete surface. That is, the upper end of the casing extends into the outer sleeve 9 in the floating plate 1 to prevent water from entering the sleeve and corroding the steel spring. The inner sleeve 10 is the core component of the vibration isolator 3, including a top plate, a spring and a lower base plate. The top plate and the lower base plate are connected by a spring, and the lower base plate is connected to the lower base of the embedded load-bearing casing 11. As shown in Figures 4 and 5, the rubber pad 8 is arc-shaped and embedded between the base 4 and the floating plate 1; as shown in Figures 5-9, the unit plate 12 is a prefabricated assembly structure of the floating plate roadbed, with a basic length of 6 meters. The longitudinal steel bar connection position is connected with a steel bar connector. After assembly, the cast-in-place concrete construction process is adopted, and the unit plates 12 are connected with connecting hinges.

[0030] The use process of the present utility model is as follows: first, clean the shield bottom plate to ensure that there is sufficient bonding force between the base 4 and the bottom plate; when the concrete is poured to a certain thickness, place ditch templates on both sides of the base 4; when pouring the arc-shaped base 4, fix the embedded load-bearing casing 11 in the designated position and pour it. The outer diameter of the casing is just smaller than the inner diameter of the outer sleeve 9 of the steel spring and is 100mm higher than the concrete surface to prevent water from entering the sleeve and corroding the steel spring. Then, polish the arched base 4 to ensure that the upper surface of the base is round and smooth.

[0031] Secondly, the rubber mat 8 is laid. Before cutting the rubber mat 8, the horizontal ground area of ​​the roadbed is accurately calculated according to the laying range of the rubber mat to ensure the beauty after laying.

[0032] During use, rainwater or collected water will flow into the drainage ditch along both sides of the arc-shaped rubber pad 8 under the action of its own gravity. When squeezed, the internal water will impact the side wall of the drainage ditch in an inclined direction. The impact position will be different depending on the pressure. When the traditional rubber pad 8 is squeezed, it will directly impact the same position of the side wall, which will cause the side wall structure to be unstable for a long time and affect the vibration reduction effect.

[0033] Secondly, considering that the integrity of the floating slab track bed and the vibration reduction effect are directly proportional, the cast-in-place structure length of the floating slab 1 is generally about 30 meters for the best effect. Therefore, the steel spring floating slab track bed is designed as a prefabricated assembly structure with a basic section length of 6 meters. The longitudinal steel bar connection position is reserved in the prefabrication plant. The longitudinal steel bar connection is connected by a steel bar connector. After on-site assembly and splicing, the cast-in-place concrete construction process is adopted to complete the floating slab 1 track bed as a whole. The unit plates 12 are also connected by connecting hinges, and the bottom of the floating slab 1 is made into a concave structure. The prefabricated assembly structure theory is used to solve the integrity effect of the floating slab track bed construction, and solve the problem of slow progress in the construction of special vibration reduction track beds and the problem of replacing damaged parts of the floating slab.

[0034] In addition, the outer sleeve 9 is pre-buried near the sleeper, and the surface of the outer sleeve 9 is provided with a cover plate which is connected in one piece by rubber and metal to prevent dust and other substances from entering the vibration isolator 3; the inner sleeve 10 is placed in the outer sleeve 9, and the bottom of the inner sleeve 10 is connected to the pre-buried load-bearing casing 11. By compressing and rotating the inner sleeve 10, the spring of the inner sleeve 10 contracts and the upper part is pressed against the bearing block of the outer sleeve 9, and a split gasket of the same thickness is placed under the bearing block to lift and level the floating plate 1.

[0035] When the floating plate 1 is prefabricated, a wing plate 5 structure is set every 3 meters, with the longitudinal length controlled at 200-300mm and the thickness controlled within 200mm. The ditch under the wing plate 5 is guaranteed to be unobstructed, and the remaining ditches are installed with ditch covers to ensure the lateral stability of the floating plate roadbed, solving the long-standing problem of water collection, silt collection, and fallen objects that are difficult to clean and handle in the vibration reduction area.

[0036] The working principle of this device is: when a rail vehicle passes through the new floating slab roadbed device, the floating slab roadbed moves downward under the action of gravity, and the spring of the inner sleeve hinders the downward movement of the roadbed under the action of elastic damping. With the assistance of the rubber pad, the vibration reduction effect of the floating slab roadbed is better; and the cushion layer is made into an arched structure, and no intermediate drainage ditch is provided on the cushion layer, so that the roadbed water is drained from both sides of the floating slab.

[0037] The above description is only a specific implementation method of this utility model, but the protection scope of this utility model is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by this utility model, can make equivalent substitutions or changes based on the technical solutions and new concepts of this utility model, which should be covered by the protection scope of this utility model.

Claims

1. A new vibration-damping ballast structure, characterized in that include The base is in a convex arc shape at the top, and drainage ditches are arranged at the junctions of the two sides of the base and the convex arc shape, and the bottom of the drainage ditches is lower than the edges of the two sides of the convex arc shape of the base; A floating plate is arranged on the top of the base, and the lower part of the floating plate is in a concave arc shape; A plurality of vibration isolators are used to connect the base and the floating plate. The vibration isolators include an outer sleeve, an inner sleeve and a pre-embedded load-bearing casing. The outer sleeve is a hollow cylinder embedded in the floating plate. A load-bearing block is arranged in the outer sleeve. The pre-embedded load-bearing casing includes a lower base and a casing. The casing is hollow inside and the lower part is fixedly connected to the lower base. The lower base is pre-embedded in the convex arc of the base. The inner sleeve includes a top plate, a spring and a lower bottom plate. The top plate and the lower bottom plate are connected by a spring. The lower bottom plate is connected to the lower base of the pre-embedded load-bearing casing. The top plate of the inner sleeve is cooperatively connected with the load-bearing block of the outer sleeve.

2. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The lower end of the base is rectangular or arc-shaped.

3. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The drainage ditch is a rectangular hollow cuboid, and the upper part of the drainage ditch passes through the top of the floating plate and is provided with a ditch cover.

4. A novel vibration-damping ballast structure as claimed in claim 3, characterized in that A wing plate is provided at an upper middle position of the drainage ditch.

5. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The inner diameter of the outer sleeve is larger than the outer diameter of the embedded load-bearing casing, and a bearing block is provided at a lower position of the top of the outer sleeve.

6. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The upper end of the casing extends into the interior of the outer casing in the floating plate.

7. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The invention also comprises a rubber pad which is in an arc shape and is embedded between the base and the floating plate.

8. A novel vibration-damping ballast structure as claimed in claim 1, characterized in that The floating slab is prefabricated and assembled by a number of unit plates. The longitudinal steel bar connection positions are connected by steel bar connectors. After assembly, cast-in-place concrete is used. The unit plates are connected by connecting hinges.

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