High-speed magnetic levitation bridge full-enclosed sound barrier structure

Abstract

This utility model belongs to the field of bridge engineering, specifically disclosing a fully enclosed sound barrier structure for a high-speed maglev bridge. It includes a main frame covering the upper part of the maglev bridge, comprising two layers of arc-shaped metal plates and single-layer metal plate stiffening ribs spaced at a certain distance between the two layers. Lightweight concrete is filled between the two metal plates, and sound-absorbing and pressure-relief windows are installed at the arc-shaped tops of the two metal plates. The lower end of the main frame is sealed to the lower beam, forming a closed space after the fully enclosed sound barrier structure is connected to the high-speed maglev bridge. When the air pressure difference between the inside and outside of the fully enclosed sound barrier structure reaches a certain value, the sound-absorbing and pressure-relief windows automatically open under the action of air pressure, effectively reducing pressure while providing sound insulation. This utility model can significantly reduce the noise level along the route, meeting environmental noise standards and effectively protecting the living environment of surrounding residents.

Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering, specifically relating to a fully enclosed sound barrier structure for a high-speed maglev bridge. Background Technology

[0002] Fully enclosed sound barriers create a sealed acoustic space to confine and isolate the noise generated by train operation within a specific area, thereby reducing the impact on the surrounding environment. High-speed trains traveling at extremely high speeds inside fully enclosed sound barriers generate excessive aerodynamic forces, causing problems in the structural design of the sound barrier and sonic booms at entrances and exits. Therefore, it is necessary to reduce pressure as much as possible while providing sound insulation. Thus, a fully enclosed sound barrier structure compatible with high-speed maglev lines needs to be designed. Utility Model Content

[0003] In view of the above situation, the purpose of this utility model is to provide a fully enclosed sound barrier structure for high-speed maglev bridges, which can significantly reduce the noise level in the area along the line, meet the environmental noise standards, effectively protect the living environment of the surrounding residents, and at the same time eliminate the impact of aerodynamic forces generated by high-speed trains and sonic booms at the tunnel entrances, thereby improving the safety of trackside facilities.

[0004] To further achieve the above objectives, this utility model adopts the following technical solution: a fully enclosed sound barrier structure for a high-speed maglev bridge, comprising a main frame covering the upper end of the high-speed maglev bridge, the main frame comprising two layers of arc-shaped metal plates and a single layer of metal plate stiffening ribs spaced a certain distance between the two layers of metal plates, lightweight concrete filling the space between the two layers of metal plates, and sound-absorbing and pressure-relieving windows installed at the arc-shaped tops of the two layers of metal plates; the lower end of the main frame is sealed to the lower beam, so that the fully enclosed sound barrier structure forms a closed space after being connected to the high-speed maglev bridge, so that when the air pressure difference between the inside and outside of the fully enclosed sound barrier structure reaches a certain value, the sound-absorbing and pressure-relieving windows automatically open under the action of air pressure, thus providing sound insulation while maximizing pressure relief.

[0005] Optionally, multiple sound-absorbing and pressure-relief windows are provided along the length of the bridge, each spaced 5m apart.

[0006] Furthermore, the sound-absorbing and pressure-relieving window includes ventilation louvers installed in a metal frame, the ventilation louvers are filled with sound-absorbing material, and ventilation gaps are left between each ventilation louver.

[0007] Furthermore, mounting holes are provided at the same position on both metal plates for mounting the metal frame and fixing the sound-absorbing and pressure-relief window to the main frame.

[0008] Optionally, the single-layer metal plate stiffening rib is welded and fixed between the two layers of metal plates.

[0009] Optionally, the high-speed maglev bridge has pre-reserved post-cast concrete slots at both ends on the upper side, and the fully enclosed sound barrier structure is inserted into the pre-reserved post-cast concrete slots and concrete is poured into the post-cast concrete slots.

[0010] Optionally, the fully enclosed sound barrier structure is connected to the flange base of the high-speed maglev bridge by bolting or welding.

[0011] Optionally, the beams of the high-speed maglev bridge are provided with bottom bracing.

[0012] The present invention, by adopting the above-described technical solution, can achieve the following beneficial effects:

[0013] (1) Significant noise reduction effect: The fully enclosed sound barrier structure can effectively block the propagation of aerodynamic noise generated by the high-speed operation of the superconducting maglev train. Compared with the traditional vertical sound barrier, it has higher noise reduction performance. It can significantly reduce the noise level in the area along the line, meet the environmental noise standard requirements, and effectively protect the living environment of the surrounding residents.

[0014] (2) Eliminating the influence of internal aerodynamic forces: The fully enclosed sound barrier structure eliminates the influence of aerodynamic forces generated by high-speed trains and sonic booms at the tunnel entrance by setting sound-absorbing and pressure-relieving windows at the top, thereby improving the safety of trackside facilities.

[0015] (3) Enhance landscape harmony: The appearance design of the fully enclosed sound barrier can be optimized according to the surrounding environment and blend with the natural landscape and urban style. Using transparent sound insulation materials or artistic appearance design can reduce the impact of the sound barrier on the visual landscape and make it a beautiful scenic line.

[0016] (4) Reduced maintenance costs: The fully enclosed sound barrier has a strong overall structure, reducing the number of exposed and vulnerable parts, and reducing the risk of damage and aging of parts caused by natural factors such as wind, sun and rain. At the same time, because noise is effectively controlled, it reduces noise erosion to surrounding facilities and buildings, and lowers the maintenance costs of related facilities. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Metal plate; 2. Beam bottom brace; 3. Post-cast concrete groove; 4. Sound-absorbing and pressure-relief window; 5. Lightweight concrete. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0021] This utility model provides a fully enclosed sound barrier structure for high-speed maglev bridges. By constructing a closed acoustic space, it confines and isolates the noise generated by train operation within a specific area, thereby reducing the impact on the surrounding environment. Figure 1 As shown, the fully enclosed sound barrier structure on the high-speed maglev bridge includes a main frame covering the upper part of the bridge. This main frame comprises two layers of arc-shaped metal plates 1 and single-layer metal plate stiffening ribs spaced at intervals between the two layers of metal plates 1. Lightweight concrete 5 is filled between the two layers of metal plates 1. Preferably, a single-layer metal plate stiffening rib is provided at 0.5m intervals between the two layers of metal plates 1, and the single-layer metal plate stiffening ribs are welded and fixed to the two layers of metal plates 1. For superconducting maglev in high-speed maglev, if the bottom of the fully enclosed sound barrier structure intrudes into the superconducting magnetic field's influence range within 1.5m, then non-magnetic steel materials, such as stainless steel, are used for the magnetic field influence range at the bottom of the fully enclosed sound barrier structure. If the fully enclosed sound barrier does not intrude into the superconducting magnetic field's influence range within 1.5m, then ordinary metal materials are used.

[0022] In this invention, a sound-absorbing and pressure-relief window 4 is installed on the arc-shaped top of the two metal plates 1. Multiple sound-absorbing and pressure-relief windows 4 are arranged along the length of the bridge, each spaced approximately 5 meters apart. These windows 4 typically employ a design similar to sound-absorbing louvers, such as self-closing louvers, including ventilation louvers installed within a metal frame. The ventilation louvers are filled with sound-absorbing materials, such as centrifugal glass wool, and ventilation gaps are left between each ventilation louver. Mounting holes are opened at the same position on both metal plates 1 for installing the metal frame, thereby fixing the sound-absorbing and pressure-relief window 4 to the main frame.

[0023] In this invention, the upper ends of the high-speed maglev bridge are reserved with post-cast concrete slots 3. The post-cast concrete slots 3 are integrally formed with the lower beam. The fully enclosed sound barrier structure is prefabricated in sections in the factory and transported to the site. It can be inserted into the reserved post-cast concrete slots 3, and concrete is poured into the post-cast concrete slots 3 to achieve a stable connection while ensuring airtightness. Alternatively, the fully enclosed sound barrier structure can also be connected to the flange base of the high-speed maglev bridge body by bolts and welding to ensure airtightness. After the fully enclosed sound barrier structure is connected to the high-speed maglev bridge, a closed space is formed. When the air pressure difference between the inside and outside of the fully enclosed sound barrier structure reaches a certain value (generally 3.5 kPa, which is reached when the train passes quickly), the sound-absorbing and pressure-relieving window 5 automatically opens under the action of air pressure to release pressure outward, which plays the role of sound insulation and pressure relief as much as possible.

[0024] In this invention, porous sound-absorbing material and sound-absorbing structure can be provided on the inner side of the inner metal plate 1. The porous sound-absorbing material and sound-absorbing structure generally adopt thin plate resonant sound-absorbing structure or perforated plate resonant sound-absorbing structure to absorb and attenuate noise entering the sound barrier.

[0025] In this invention, the appearance design of the fully enclosed sound barrier structure can be optimized according to the surrounding environment, blending with the natural landscape and urban style. For example, using transparent sound insulation materials such as PET high-transparency panels or employing artistic designs can reduce the impact of the sound barrier on the visual landscape, making it a beautiful sight along the railway line. Furthermore, the internal railway components of the sound barrier can be protected from water and corrosion by using durable materials and advanced anti-corrosion and waterproofing processes. For instance, durable materials include weathering steel and stainless steel, and advanced anti-corrosion and waterproofing processes, such as penetrating crystalline anti-corrosion coating (CCCW) technology, can extend the service life of the sound barrier structure and further reduce the total life-cycle maintenance costs.

[0026] In this invention, the high-speed maglev bridge's beams are equipped with bottom bracing 2 to ensure the stability and safety of the overall structure. The main frame is a metal structure filled with lightweight concrete 5 to meet the requirements of high strength and stability. The metal structure frame has advantages such as light weight, high strength, and convenient construction. It uses metal plates as the main components, which are assembled into a stable frame system by welding with single-layer metal plate stiffeners.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit or restrict this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection declared by this utility model.

Claims

1. A high-speed maglev bridge full-enclosed sound barrier structure comprising a main frame covering the upper end of a high-speed maglev bridge, characterized in that, The main frame comprises two layers of arc-shaped metal plates and a single-layer metal plate stiffening rib set at a certain distance between the two layers of metal plates. Lightweight concrete is filled between the two layers of metal plates, and a sound-absorbing and pressure-relieving window is installed at the arc-shaped top of the two layers of metal plates. The lower end of the main frame is sealed to the lower beam, so that the fully enclosed sound barrier structure forms a closed space after being connected to the high-speed maglev bridge. When the air pressure difference between the inside and outside of the fully enclosed sound barrier structure reaches a certain value, the sound-absorbing and pressure-relieving window will automatically open under the action of air pressure, so as to reduce pressure as much as possible while insulating sound.

2. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 1, characterized in that, Multiple sound-absorbing and pressure-relief windows are installed along the length of the bridge, with each window spaced 5m apart.

3. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 2, characterized in that, The sound-absorbing and pressure-relief window includes ventilation louvers installed in a metal frame. The ventilation louvers are filled with sound-absorbing material, and ventilation gaps are left between each ventilation louver.

4. The full-enclosed sound barrier structure on high-speed maglev bridge according to claim 3, characterized in that, Mounting holes are opened at the same position on both metal plates for mounting the metal frame and fixing the sound-absorbing and pressure-relief window to the main frame.

5. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 1, characterized in that, The single-layer metal plate stiffening rib is welded and fixed between the two layers of metal plates.

6. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 1, characterized in that, The high-speed maglev bridge has pre-reserved post-cast concrete slots at both ends of its upper side. The fully enclosed sound barrier structure is inserted into the pre-reserved post-cast concrete slots and concrete is poured into the post-cast concrete slots.

7. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 1, characterized in that, The fully enclosed sound barrier structure is connected to the flange base of the high-speed maglev bridge by bolts or welding.

8. The high-speed maglev bridge full-enclosed sound barrier structure according to claim 1, characterized in that, The high-speed maglev bridge has diagonal bracing at the bottom of its beams.

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