CN218756966U - Vibration and noise reduction type bridge Liang Shen contraction structure - Google Patents

Abstract

The utility model discloses a type of making an uproar bridge Liang Shen contracts structure falls in damping, including being fixed in the bridge top and stretching over the broach type damping plate at expansion joint, broach type damping plate is including the first board, first damping layer and the second board that stack in proper order. The utility model discloses possess good damping and fall the characteristics of making an uproar, can improve extending structure's life simultaneously.

Description

Vibration and noise reduction type bridge Liang Shen contraction structure

Technical Field

The utility model relates to a bridge expansion gap technical field, concretely relates to type of making an uproar bridge Liang Shen contracts structure falls in damping.

Background

Implementation of the new noise method puts higher demands on traffic noise control. When a vehicle rapidly drives across the expansion joint of the bridge, not only can bridge deck vibration be caused to form structural noise, but also noise can be transmitted downwards through the expansion joint, and great noise pollution is caused to the surrounding residential environment. Bridge expansion joint noise is the result that the discontinuous step form surface in expansion joint department was passed in the vehicle tire striking, and current fishback formula telescoping device is when using, and the bolt on the telescoping device receives vehicle load's impact back, and the nut is not hard up easily, and then leads to the fishback perk, shortens bridge telescoping device life greatly, produces corresponding potential safety hazard simultaneously. Therefore, it is necessary to develop a bridge telescopic structure with vibration and noise reduction and long service life.

The patent specification with the publication number of CN111021241A discloses a multidirectional shifting bridge expansion joint structure, wherein a supporting plate is arranged below a comb plate, a buffer rubber pad is arranged between the supporting plate and the comb plate, an anchoring plate is welded at the bottom of the supporting plate, a vertical shifting rubber pad is arranged on concrete below the cross-joint comb plate, and the comb plate is connected with the supporting plate through an anchoring bolt. The instantaneous impact stress that produces between fishback and below concrete when this structure had avoided the vertical displacement of bridge has reduced telescoping device maintenance rate, the maintenance degree of difficulty and maintenance cost, adopts vertical displacement rubber pad can avoid instantaneous impact stress betterly, nevertheless is relatively poor to the damping noise reduction effect of bridge floor structure noise.

The patent specification with the publication number of CN216129966U discloses a noise reduction type expansion device for a bridge expansion joint, a through linear type gap is changed into an intermittent curve type through arranging a comb plate, impact can be reduced, noise can be reduced, a bolt only needs to be screwed down through a connecting component and a rubber sealing strip which are arranged, the comb plate is detached, the rubber sealing strip can be quickly replaced, and the overall waterproof performance is improved through arranging a groove type permanent water receiving groove formed by bending thin stainless steel. This structure possesses certain damping and falls the performance of making an uproar, has improved the change efficiency of rubber seal area, nevertheless does not prolong its life, and the water receiving tank waterproof performance that the expansion joint bottom set up is excellent, nevertheless does not carry out the sound insulation and handles, still leads to expansion joint department air sound transmission phenomenon to take place.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a type of making an uproar bridge extending structure falls in damping possesses the good damping and falls the characteristics of making an uproar, can improve extending structure's life simultaneously.

The utility model provides a type of making an uproar bridge Liang Shen contracts structure falls in damping, is including being fixed in the bridge top and crossing the broach type damping plate at expansion joint, broach type damping plate is including the first board, first damping layer and the second board that stack in proper order.

According to the scheme, the constraint damping of the comb-tooth-shaped damping plate is utilized, so that the impact force of the motor vehicle acting on the steel plate through the tire can be effectively reduced, the energy dissipation and vibration reduction effects are exerted, and the noise of the bridge structure is indirectly reduced.

Preferably, the comb-tooth-shaped damping plates comprise two comb-tooth ends, wherein the comb-tooth end of one comb-tooth-shaped damping plate spans across the expansion joint and is connected with the comb-tooth end of the other comb-tooth-shaped damping plate.

By arranging the two spliced comb-tooth-shaped damping plates, more than 50% of the area of the ground of a vehicle tire is supported by the comb-tooth-shaped damping plates when a motor vehicle passes through the expansion joint under the condition of normal expansion and contraction of the bridge; because the expansion joint has been avoided to two broach type damping plate grafting department, the bridge expansion joint is covered by a broach type damping plate completely promptly, can effectively completely insulate road surface traffic noise and pass through the expansion joint transmission to the air sound of bridge below.

Preferably, two ends of the comb-tooth-shaped damping plate are fixed on the bridge through anchor bolts, and the anchor bolts penetrate through one end of the comb-tooth-shaped damping plate and are in threaded connection with fastening nuts.

Through fixing anchor bolt lower extreme and bridge to comb-tooth type damping plate and anchor bolt, fastening nut welding have improved the extending structure steadiness, have solved the bolt and have received the vehicle load and strike the back, and the easy not hard up problem of nut can effectively prolong extending structure's life.

Preferably, a second damping layer is arranged between the comb-tooth-shaped damping plate and the bridge deck.

Preferably, the bottom of the comb-tooth-shaped damping plate is provided with a corner block for supporting the expansion joint at a position corresponding to the expansion joint.

Preferably, the sound insulation type water collecting tank is fixed below the bridge and is opposite to the expansion joint, and the sound insulation type water collecting tank comprises a third plate, a third damping layer and a fourth plate which are arranged from inside to outside.

Through setting up sound insulation type water catch bowl in bridge expansion joint department, can prevent that the rainwater from passing through bridge expansion joint seepage, play waterproof effect, can further reduce again and transmit the air sound to the bridge below through the expansion joint, play the effect of making an uproar of falling.

Preferably, the sound insulation type water collecting tank is fixed below the bridge floor through a support; the top of one side of the sound insulation type water collecting tank is provided with a vibration damping pad, and a gap is reserved between the top of the other side and the bridge.

Preferably, a fourth damping layer is arranged between the bottom of the sound insulation type water collecting tank and the support.

Preferably, the surface of the bracket is provided with a zinc coating.

The utility model has the advantages that:

the utility model discloses a set up at bridge top expansion joint department broach type damping plate and set up the joint use at bridge below expansion joint department sound insulation type water catch bowl, effectively reduced bridge expansion joint department noise to prevent expansion joint department rainwater seepage.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a structure of a comb-tooth-shaped damping plate;

fig. 3 is a schematic view of an installation structure of the sound insulation type water collecting tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the vibration and noise reduction type bridge Liang Shen contraction structure comprises a comb-tooth-shaped damping plate fixed above the bridge and crossing an expansion joint and a sound insulation type water collecting tank fixed below the bridge and facing the expansion joint, and the two are used together, so that the noise at the expansion joint of the bridge can be effectively reduced, and the rainwater leakage at the expansion joint can be prevented.

As shown in fig. 1 and 2, there are two comb-tooth-shaped damping plates, wherein the comb-tooth end of one comb-tooth-shaped damping plate 1 crosses the expansion joint to be inserted into the comb-tooth end of the other comb-tooth-shaped damping plate 2. The comb-tooth-shaped damping plate comprises a first plate 10, a first damping layer 11 and a second plate 12 which are sequentially stacked, the first plate 10 and the second plate 12 are made of steel plates, and a constraint steel plate 13 is welded between the two layers of steel plates for reinforcement.

On the broach type damping plate both ends specifically were fixed in the bridge through anchor bolt 4, anchor bolt 4 lower extreme welded with bridge embedded bar 8, stirrup 9, guaranteed the levelness of stirrup 9 during the welding, pre-buried in the expansion joint both sides concrete after the welding. Be equipped with a plurality of bolt holes 7 on the broach type damping plate, anchor bolt 4 upper end passes bolt hole 7 and spiro union fastening nut, and fastening nut and broach type damping plate carry out full weld in bolt hole 7 department, fill epoxy in bolt hole 7 department after full weld.

In this embodiment, the bottom of broach type damping plate corresponds the expansion joint position and is equipped with the hornblock 3 that supports it, and whole broach type damping plate is vertically link up along stretching the seam to hornblock 3, and both ends are fixed on the bridge, and its main function is to improve structural rigidity, increases the stability of broach type damping plate in the expansion joint department, improves the driving travelling comfort, indirectly reduces partial bridge floor structure noise. The angle block 3 can select equal-limb angle steel or unequal-limb angle steel according to the structural requirements, and can select channel steel or square steel without the limitation of structural forms of deformed steel.

As shown in fig. 3, the sound insulation type water collecting tank 5 is fixed below the bridge through an L-shaped bracket 6, the sound insulation type water collecting tank 5 is fixedly connected with the side edge of the bracket 6 through a plurality of self-tapping screws 14, and one side of the bracket 6 is fixed on the bottom surface of the bridge through a plurality of expansion bolts 15.

The sound insulation type water collecting tank 5 comprises a third plate 51, a third damping layer 52 and a fourth plate 53 which are arranged from inside to outside, and the third plate 51 and the fourth plate 53 are also made of steel plates; the surface of the bracket 6 is provided with a hot galvanizing layer or fluorocarbon paint and the like to enhance the corrosion resistance and prolong the service life, and the bracket 6 specifically adopts an L-shaped channel steel.

In this embodiment, the top of the sound insulation type water collecting tank 5 is provided with a folded edge inwards, and the top of the sound insulation type water collecting tank 5 close to the side of the bracket 6 is provided with a vibration damping pad 16, so as to prevent the structural vibration of the bridge from being transmitted to the bracket 6 and generating secondary noise.

Certain gaps are reserved between the top of the sound insulation type water collecting tank 5, which is far away from the side edge of the support 6, and the bottom of the bridge, so that the sound insulation type water collecting tank 5 is prevented from being rigidly connected with the bridge to influence the vibration reduction and noise reduction effects.

In this embodiment, a second damping layer is disposed between the comb-tooth-shaped damping plate and the bridge deck, and a fourth damping layer is disposed between the bottom of the sound insulation water collection tank 5 and the support 6, so as to further improve the vibration and noise reduction effects.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides a type of making an uproar bridge Liang Shen contracts structure falls in damping, its characterized in that is including being fixed in the bridge top and crossing the broach type damping plate at expansion joint, broach type damping plate is including the first board, first damping layer and the second board that stack in proper order.

2. The vibration and noise reduction bridge Liang Shen as in claim 1, wherein said comb-shaped damping plates comprise two pieces, and the comb-shaped end of one piece of comb-shaped damping plate is connected with the comb-shaped end of the other piece of comb-shaped damping plate across the expansion joint.

3. The vibration and noise reduction bridge Liang Shen of claim 1, wherein two ends of the comb-tooth damping plate are fixed on the bridge through anchor bolts, and the anchor bolts penetrate through one end of the comb-tooth damping plate and are in threaded connection with fastening nuts.

4. The vibration and noise reduction bridge Liang Shen of claim 1 wherein a second damping layer is disposed between the comb-teeth damping plate and the bridge deck.

5. The vibration and noise reduction type bridge Liang Shen contraction structure according to claim 1, wherein a corner block for supporting the comb-tooth type damping plate is arranged at a position corresponding to the expansion joint at the bottom of the comb-tooth type damping plate.

6. The vibration and noise reduction type bridge Liang Shen contraction structure according to claim 1, further comprising a sound insulation type water collection tank fixed below the bridge and facing the expansion joint, wherein the sound insulation type water collection tank comprises a third plate, a third damping layer and a fourth plate which are arranged from inside to outside.

7. The vibration and noise reduction bridge Liang Shen reduction structure of claim 6, wherein said acoustic collection troughs are fixed below the deck by brackets; the top of one side of the sound insulation type water collecting tank is provided with a vibration damping pad, and a gap is reserved between the top of the other side and the bridge.

8. The vibration and noise reduction bridge Liang Shen of claim 7 wherein a fourth damping layer is disposed between the bottom of the sound insulation type water collection groove and the bracket.

9. The vibration and noise reduction bridge Liang Shen of claim 7 wherein said bracket surface is provided with a zinc coating.

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