Sound-absorbing and noise-reducing viaduct small box girder structure

Abstract

The utility model relates to a sound absorption and noise reduction viaduct small box girder structure which comprises a pier, a plurality of shock absorption and isolation lead core supports are evenly and fixedly installed on the top of the pier at equal intervals, and a prefabricated small box girder is fixedly installed on the top of the pier through the shock absorption and isolation lead core supports. And a plurality of microporous acoustic panels are arranged at the lower part in the groove at the bottom of the prefabricated small box girder. According to the sound absorption and noise reduction viaduct small box girder structure, the piers, the prefabricated small box girders, the shock absorption and isolation lead core supports, the cavities, the micropore sound absorption boards, the sound absorption cotton layers, the fixing frames and the bolts are used in cooperation, and an effective sound insulation cavity is formed between the micropore sound absorption boards and the prefabricated small box girders; the cavity structure is combined with the sound-absorbing cotton layer at the top of the microporous sound-absorbing board, so that the sound-absorbing and sound-insulating composite board has remarkable sound-insulating and sound-absorbing functions. And the tire noise generated by the auxiliary pavement layer of the urban viaduct ground can be obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of viaducts, and particularly relates to a small box girder structure of a sound-absorbing and noise-reducing viaduct. Background Technique

[0002] A viaduct refers to a bridge built above an urban road, usually used to relieve urban traffic pressure and improve traffic efficiency. Such bridges are generally built above ground traffic roads, which can effectively reduce congestion problems at intersections and ensure unobstructed vehicle traffic. Viaducts are usually used on main traffic arteries or expressways, especially in the core areas of cities or busy traffic sections.

[0003] The traditional small box girder structure of a viaduct usually adopts an open-bottom design. This design method is difficult to effectively isolate and control noise when vehicles pass through the viaduct. The open bottom not only fails to effectively block the propagation of noise generated during vehicle operation, but also allows the noise to be directly transmitted to the area under the bridge, seriously affecting the quality of life of surrounding residents and potentially threatening traffic safety. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a small box girder structure of a sound-absorbing and noise-reducing viaduct to solve the problems mentioned in the above background technique in view of the deficiencies of the above-mentioned prior art.

[0005] The technical solution of the utility model for solving the above technical problems is as follows: A small box girder structure of a sound-absorbing and noise-reducing viaduct, which includes: bridge piers, and a plurality of seismic isolation lead core bearings are fixedly installed on the top of the bridge piers at equal intervals and evenly. The top of the bridge piers is fixedly installed with precast small box girders through the seismic isolation lead core bearings. Below the inner part of the bottom groove of the precast small box girders, a plurality of microporous sound-absorbing plates are arranged. A cavity is formed at the bottom of the precast small box girders through the microporous sound-absorbing plates. On both sides of the top of the microporous sound-absorbing plates, a plurality of threaded holes are evenly opened at equal intervals.

[0006] On the lower sides of both inner walls of the cavity, fixing frames corresponding to the positions and quantities of the threaded holes are fixedly installed through screws. A threaded cylinder is fixedly installed at the bottom of the fixing frame. The microporous sound-absorbing plate is threadedly connected with a bolt through the threaded hole, and the bolt is threadedly connected with the threaded cylinder at the corresponding position.

[0007] Preferably, a plug is fixedly installed at the rear end of the microporous sound-absorbing panel. A connection groove is formed at the front end of the microporous sound-absorbing panel, and the connection groove is adapted to the plug. Symmetrically distributed fixing grooves are formed at the rear side of the inner wall of the connection groove. A sliding groove is formed inside the front end of the microporous sound-absorbing panel between the two fixing grooves. A sliding rod is fixedly installed inside the sliding groove. A slider is sleeved on the outer wall of the sliding rod, and the slider is slidably connected to the sliding groove. A spring is sleeved on the outer wall of the sliding rod at the rear side of the slider. Limiting plates are fixedly installed at the top and bottom of the slider, and the limiting plates are slidably inserted into the corresponding fixing grooves.

[0008] Preferably, a sound-absorbing cotton layer is arranged on the top of the microporous sound-absorbing panel.

[0009] Preferably, a positioning groove is formed at the rear side of the bottom of one of the limiting plates. A positioning hole corresponding to the position of the positioning groove is formed at the rear side of the connection groove at the bottom of the microporous sound-absorbing panel. A metal plug is slidably inserted into the positioning hole, and the metal plug is inserted into the positioning groove.

[0010] Preferably, a sliding hole adapted to the sliding rod is formed in the slider, and the slider is slidably connected to the sliding rod through the sliding hole formed therein.

[0011] Preferably, the distance between the two limiting plates is adapted to the thickness of the plug.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. Through the combined use of the bridge pier, precast small box girder, seismic isolation and vibration reduction lead core bearing, cavity, microporous sound-absorbing panel, sound-absorbing cotton layer, fixing frame and bolts in the present utility model, an effective sound insulation cavity is formed between the microporous sound-absorbing panel and the precast small box girder. The cavity structure, in combination with the sound-absorbing cotton layer on the top of the microporous sound-absorbing panel, has significant sound insulation and sound absorption functions. And it can significantly reduce the tire noise generated by the ground auxiliary pavement layer of the urban viaduct, and has advantages such as excellent noise reduction effect, low cost and environmental protection. In addition, the microporous sound-absorbing panel is fixed by directly using bolts to firmly fix it at the bottom of the precast small box girder. This bolt fixing method is not only simple, but also in the later maintenance process, if a certain microporous sound-absorbing panel is damaged, it can be quickly disassembled and replaced, greatly reducing the complexity of maintenance and repair, and improving the practicability and maintenance convenience.

[0014] 2. Through the combined use of the insertion block, connection groove, slider, spring, sliding groove, sliding rod, positioning hole, metal bolt, fixed groove and limiting plate in the present utility model, adjacent microporous sound-absorbing panels before and after will be mutually limited. Even if the connection structure between a certain microporous sound-absorbing panel and the precast small box girder fails, the limiting structure between the front and rear microporous sound-absorbing panels can still maintain the stable installation of the microporous sound-absorbing panel. This significantly improves the stability of the microporous sound-absorbing panel at the bottom of the precast small box girder, forming a double limiting effect, thereby effectively preventing the problem of the microporous sound-absorbing panel falling off due to bolt loosening and improving the safety of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural view of a sound-absorbing and noise-reducing viaduct small box girder structure according to an embodiment of the present utility model.

[0016] Figure 2 FIG. is a schematic structural view of an inverted precast small box girder according to an embodiment of the present utility model.

[0017] Figure 3 FIG. is a schematic structural view of a microporous sound-absorbing panel according to an embodiment of the present utility model.

[0018] Figure 4 FIG. is a schematic side sectional view of the connection between two microporous sound-absorbing panels according to an embodiment of the present utility model.

[0019] Figure 5 In the figures, the list of components represented by each reference numeral is as follows: Figure 1 The enlarged structural view at A in FIG.

[0020] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0021] 1, pier; 2, precast small box girder; 3, seismic isolation and vibration reduction lead core bearing; 4, cavity; 5, microporous sound-absorbing panel; 6, sound-absorbing cotton layer; 7, insertion block; 8, threaded hole; 9, connection groove; 10, slider; 11, spring; 12, sliding groove; 13, sliding rod; 14, positioning hole; 15, metal bolt; 16, fixed groove; 17, positioning groove; 18, limiting plate; 19, fixing frame; 20, bolt; 21, threaded barrel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The principles and features of the present utility model will be described below with reference to the attached drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model.

[0026] Please refer to Figures 1 - 5 , a sound-absorbing and noise-reducing viaduct small box girder structure provided by the present utility model includes: a pier 1, a plurality of seismic isolation lead core bearings 3 are fixedly installed at equal intervals and evenly on the top of the pier 1, and a precast small box girder 2 is fixedly installed on the top of the pier 1 through the seismic isolation lead core bearings 3. A plurality of microporous sound-absorbing plates 5 are arranged below the inner part of the bottom groove of the precast small box girder 2. A cavity 4 is formed at the bottom of the precast small box girder 2 through the microporous sound-absorbing plates 5. A plurality of threaded holes 8 are evenly opened at equal intervals on both sides of the top of the microporous sound-absorbing plate 5;

[0027] On both sides of the lower part of the inner wall of the cavity 4, fixing frames 19 corresponding to the positions and numbers of the threaded holes 8 are fixedly installed by screws. A threaded cylinder 21 is fixedly installed at the bottom of the fixing frame 19. The microporous sound-absorbing plate 5 is threadedly connected with a bolt 20 through the threaded hole 8, and the bolt 20 is threadedly connected with the threaded cylinder 21 at the corresponding position.

[0028] A plug block 7 is fixedly installed at the rear end of the microporous sound-absorbing panel 5. A connecting groove 9 is formed at the front end of the microporous sound-absorbing panel 5, and the connecting groove 9 is adapted to the plug block 7. Symmetrically distributed fixing grooves 16 are formed at the rear side of the inner wall of the connecting groove 9. A sliding groove 12 is formed inside the front end of the microporous sound-absorbing panel 5 between the two fixing grooves 16. A sliding rod 13 is fixedly installed inside the sliding groove 12. A slider 10 is sleeved on the outer wall of the sliding rod 13, and the slider 10 is slidably connected to the sliding groove 12. A spring 11 is sleeved on the outer wall of the sliding rod 13 at the rear side of the slider 10. Limit plates 18 are fixedly installed at the top and bottom of the slider 10, and the limit plates 18 are slidably inserted into the corresponding fixing grooves 16.

[0029] In one or more embodiments of the present utility model, a sound-absorbing cotton layer 6 is arranged on the top of the microporous sound-absorbing panel 5. By covering the upper surface of the microporous sound-absorbing panel 5 with the sound-absorbing cotton layer 6, its sound-absorbing performance is effectively enhanced. The sound-absorbing cotton layer 6 can further reduce the reflection of sound waves and absorb more sounds, thereby improving the overall noise reduction effect.

[0030] In one or more embodiments of the present utility model, a positioning groove 17 is formed at the rear side of the bottom of one limit plate 18. A positioning hole 14 corresponding to the position of the positioning groove 17 is formed at the rear side of the connecting groove 9 at the bottom of the microporous sound-absorbing panel 5. A metal plug 15 is slidably inserted into the positioning hole 14, and the metal plug 15 is inserted into the positioning groove 17, which can limit the initial position of the limit plate 18 inside the fixing groove 16. When installing the microporous sound-absorbing panel 5, it is not necessary for the installer to operate the position of the limit plate 18, improving the installation convenience of the microporous sound-absorbing panel 5.

[0031] In one or more embodiments of the present utility model, a sliding hole adapted to the sliding rod 13 is formed on the slider 10, and the slider 10 is slidably connected to the sliding rod 13 through the sliding hole formed thereon, realizing the stable sliding of the slider 10 on the outer wall of the sliding rod 13.

[0032] In one or more embodiments of the present utility model, the distance between the two limit plates 18 is adapted to the thickness of the plug block 7, enabling the limit plates 18 to perform more precise and stable limiting on the plug block 7.

[0033] Parts not involved in this application are the same as or can be implemented using the prior art. When constructing this viaduct, the precast small box girder 2 is connected to the pier 1 through the seismic isolation lead core bearing 3, and a microporous sound-absorbing board 5 is laid inside the bottom groove of the precast small box girder 2. For the laying method of the microporous sound-absorbing board 5, the specific operation is as follows: First, a certain number of fixing frames 19 are fixed by screws under the two sides of the inner wall of the bottom groove of the precast small box girder 2. Then, the top of the microporous sound-absorbing board 5 is abutted against the bottom end of the threaded cylinder 21, and both sides of the microporous sound-absorbing board 5 will contact the inner wall of the bottom groove of the precast small box girder 2. And the bolt 20 is screwed into the threaded cylinder 21 through the threaded hole 8 from the bottom end of the threaded hole 8 on the upper part of the microporous sound-absorbing board 5, completing the fixation of the microporous sound-absorbing board 5 at the bottom of the precast small box girder 2. In this way, the large-area laying of the microporous sound-absorbing board 5 inside the bottom groove of the precast small box girder 2 is completed. After the overall installation of the microporous sound-absorbing board 5, an effective sound insulation cavity 4 is formed between the microporous sound-absorbing board 5 and the precast small box girder 2. This cavity structure, combined with the sound-absorbing cotton layer 6 on the top of the microporous sound-absorbing board 5, has significant sound insulation and sound absorption functions. And it can significantly reduce the tire noise generated by the ground auxiliary pavement layer of the urban viaduct, having advantages such as excellent noise reduction effect, low cost, and environmental protection. In addition, the microporous sound-absorbing board 5 is fixed to the bottom of the precast small box girder 2 firmly by directly using the bolt 20. This bolt fixing method is not only simple, but also in the later maintenance process, if a certain microporous sound-absorbing board 5 is damaged, it can be quickly disassembled and replaced, greatly reducing the complexity of maintenance and repair, and improving the practicability and maintenance convenience.

[0034] When the microporous sound-absorbing panel 5 is installed at the bottom of the precast small box girder 2, there will be a connection structure between adjacent microporous sound-absorbing panels 5. That is, the insertion block 7 at the rear end of the front microporous sound-absorbing panel 5 will be inserted into the inside of the connection groove 9 at the front end of the rear microporous sound-absorbing panel 5. The specific operation method is as follows: Before the microporous sound-absorbing panel 5 is used, the limiting plate 18 will be accommodated in the fixed groove 16 by the extrusion of the slider 10 on the spring 11, and the metal pin 15 will be inserted into the positioning groove 17 on the lower limiting plate 18 through the positioning hole 14 to position the limiting plate 18 inside the fixed groove 16. After the laying of two adjacent microporous sound-absorbing panels 5 is completed, the insertion block 7 at the rear end of the front microporous sound-absorbing panel 5 will be inserted into the inside of the connection groove 9 at the front end of the rear microporous sound-absorbing panel 5. At this time, the metal pin 15 is pulled out from the inside of the positioning groove 17 and the positioning hole 14. Under the elastic action of the spring 11, the two limiting plates 18 are driven by the slider 10 to enter the inside of the connection groove 9, and the insertion block 7 located inside the connection groove 9 is limited between the two limiting plates 18. After the large-area laying of the microporous sound-absorbing panel 5 is completed in this way, the adjacent front and rear microporous sound-absorbing panels 5 will be mutually limited. Even if the connection structure between a certain microporous sound-absorbing panel 5 and the precast small box girder 2 fails, the limiting structure between the front and rear microporous sound-absorbing panels 5 can still maintain the stable installation of the microporous sound-absorbing panel 5. The stability of the microporous sound-absorbing panel 5 at the bottom of the precast small box girder 2 is significantly improved, forming a double limiting effect, thereby effectively preventing the problem of the microporous sound-absorbing panel 5 falling off due to the loosening of the bolts 20 and improving the safety of installation. During the later maintenance, when a certain microporous sound-absorbing panel 5 needs to be disassembled, the lower limiting plate 18 needs to be adjusted first, and the upper limiting plate 18 will move synchronously with the lower limiting plate 18 through the slider 10 and reset to the inside of the fixed groove 16. In this state, the limiting plate 18 will lose the clamping effect on the insertion block 7, thereby allowing the single-piece vertical disassembly and assembly of the microporous sound-absorbing panel 5. It ensures the rapid disassembly of a single microporous sound-absorbing panel 5 without affecting the installation and stability of other panels.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An absorbent and noise-reducing viaduct small box girder structure, characterized in that, It includes: A pier (1), on the top of which several seismic isolation lead rubber bearings (3) are fixedly installed equidistantly and evenly. A precast small box girder (2) is fixedly installed on the top of the pier (1) through the seismic isolation lead rubber bearings (3). Below the inner part of the bottom groove of the precast small box girder (2), several micro-perforated sound-absorbing plates (5) are arranged. A cavity (4) is formed at the bottom of the precast small box girder (2) through the micro-perforated sound-absorbing plates (5). On both sides of the top of the micro-perforated sound-absorbing plate (5), several threaded holes (8) are equidistantly and evenly formed. On the lower sides of both inner walls of the cavity (4), fixing brackets (19) corresponding to the positions and quantities of the threaded holes (8) are fixedly installed by screws. A threaded cylinder (21) is fixedly installed at the bottom of the fixing bracket (19). The micro-perforated sound-absorbing plate (5) is threadedly connected with a bolt (20) through the threaded hole (8), and the bolt (20) is threadedly connected with the threaded cylinder (21) at the corresponding position.

2. The sound-absorbing and noise-reducing viaduct small box girder structure according to claim 1, wherein, A plug (7) is fixedly installed at the rear end of the micro-perforated sound-absorbing plate (5). A connection groove (9) is formed at the front end of the micro-perforated sound-absorbing plate (5), and the connection groove (9) is adapted to the plug (7). On the rear side of the inner wall of the connection groove (9), symmetrically distributed fixing grooves (16) are formed. Inside the front end of the micro-perforated sound-absorbing plate (5) between the two fixing grooves (16), a sliding groove (12) is formed. A sliding rod (13) is fixedly installed inside the sliding groove (12). A sliding block (10) is sleeved on the outer wall of the sliding rod (13), and the sliding block (10) is slidably connected with the sliding groove (12). A spring (11) is sleeved on the outer wall of the sliding rod (13) behind the sliding block (10). Limiting plates (18) are fixedly installed at the top and bottom of the sliding block (10), and the limiting plates (18) are slidably inserted into the corresponding fixing grooves (16).

3. The small box girder structure of a sound-absorbing and noise-reducing viaduct according to claim 2, characterized in that: A positioning groove (17) is formed at the rear side of the bottom of one of the limiting plates (18). A positioning hole (14) corresponding to the position of the positioning groove (17) is formed at the rear side of the bottom of the micro-perforated sound-absorbing plate (5) at the connection groove (9). A metal plug pin (15) is slidably inserted into the positioning hole (14), and the metal plug pin (15) is inserted into the positioning groove (17).

4. The small box girder structure of a sound-absorbing and noise-reducing viaduct according to claim 2, characterized in that: A sliding hole adapted to the sliding rod (13) is formed on the sliding block (10), and the sliding block (10) is slidably connected with the sliding rod (13) through the sliding hole formed thereon.

5. The small box girder structure of a sound-absorbing and noise-reducing viaduct according to claim 2, characterized in that: The distance between the two limiting plates (18) is adapted to the thickness of the plug (7).

6. A small box girder structure of a sound-absorbing and noise-reducing viaduct according to any one of claims 1-5, characterized in that: A sound-absorbing cotton layer (6) is arranged on the top of the micro-perforated sound-absorbing plate (5).

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