Comb tooth type bridge expansion device

Abstract

The embodiment of the utility model provides a comb tooth type bridge expansion device. The comb tooth type bridge expansion device comprises a comb tooth connecting plate, special-shaped profile steel, cantilever stiffening ribs and anchoring stiffening ribs. The comb tooth connecting plates are anchored to the beam ends of the two sides of the bridge expansion joint respectively, comb teeth of the comb tooth connecting plates on the two sides intersect with each other, and the socket and spigot joint gaps gradually become smaller. The special-shaped section steel is fixedly connected between the corresponding comb tooth connecting plate and the bridge notch; the cantilever stiffening ribs are fixedly arranged on the outer sides of the comb tooth connecting plate and the special-shaped profile steel at intervals; the plurality of anchoring stiffening ribs are arranged on the inner sides of the comb tooth connecting plate and the special-shaped profile steel at intervals; and the anchoring stiffening ribs are fixedly connected with the pre-embedded door-shaped steel bars in the corresponding bridge notches. The comb tooth type bridge expansion device disclosed by the embodiment of the utility model has the advantages of shock absorption, noise reduction, high bearing capacity, firmness, durability and simplicity and convenience in maintenance.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of bridge engineering, and specifically relate to a comb-tooth type bridge expansion and contraction device. Background Art

[0002] With the rapid development of economy and science and technology, people's demand for road traffic and traffic quality are constantly improving, and the requirements for vehicle travel safety and comfort are further improved. The bridge expansion device plays a vital role in the vehicle traffic quality and traffic safety of a bridge.

[0003] At present, the expansion devices of bridges generally use modular or comb-tooth plate expansion devices. Common modular expansion devices of bridges have simple structures and are sturdy and durable, but the vibration and noise generated by vehicles passing through the straight seams of modular expansion devices at high speeds affect the quality of vehicle passing, and the deformation displacement is limited; when vehicles pass through comb-tooth plate expansion devices at high speeds, the noise and vibration are small, and the deformation displacement is large, but the traditional comb-tooth expansion device is composed of multiple parts assembled and bolted together, with poor integrity. The load impact and vibration generated when the car passes at high speeds can easily cause the fastening bolts to loosen, the comb-tooth plate to tilt and deform, parts to fatigue and damage, and debris to block the gaps and affect the function, etc. If the management and maintenance are not timely, traffic accidents may occur in serious cases. Utility Model Content

[0004] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a comb-tooth type bridge expansion device.

[0005] An embodiment of the present disclosure provides a comb-tooth bridge expansion and contraction device, the comb-tooth bridge expansion and contraction device comprising:

[0006] Comb-tooth connection plates, the comb-tooth connection plates are respectively anchored at the ends of the beams on both sides of the bridge expansion joint, the comb teeth of the comb-tooth connection plates on both sides are crossed with each other and the socket gap gradually decreases;

[0007] Special-shaped steel, the special-shaped steel is fixedly connected between the corresponding comb-tooth connecting plate and the bridge notch;

[0008] Cantilever stiffening ribs, a plurality of cantilever stiffening ribs are fixedly arranged at intervals on the comb-tooth connecting plate and the outer side of the special-shaped steel;

[0009] Anchoring stiffening ribs, wherein a plurality of the anchoring stiffening ribs are arranged at intervals on the inner side of the comb-tooth connecting plate and the special-shaped steel; and the anchoring stiffening ribs are fixedly connected to the embedded gate-shaped steel bars in the corresponding bridge notches.

[0010] Optionally, the anchor stiffening rib is connected to the corresponding pre-embedded gate-shaped steel bars in the bridge notch by passing through longitudinal steel bars.

[0011] Optionally, the special-shaped steel is connected to the corresponding comb-tooth connecting plate and bridge notch by penetration groove welding.

[0012] Optionally, the special-shaped steel is an inverted F-shaped steel.

[0013] Optionally, the cantilever stiffening rib is connected to the corresponding comb-tooth connecting plate and the angle formed by the outer side of the special-shaped steel by penetration groove welding.

[0014] Optionally, the anchoring stiffening rib is connected to the corresponding comb-tooth connecting plate and the angle formed by the inner side of the special-shaped steel by penetration groove welding.

[0015] Optionally, the cantilever stiffening rib is a trapezoidal structure, and the anchor stiffening rib is a hollow trapezoidal structure.

[0016] Optionally, the plurality of cantilever stiffening ribs correspond one-to-one to the comb teeth of the comb tooth connecting plate;

[0017] The center lines of the anchor stiffening ribs and the cantilever stiffening ribs are on the same straight line, and at least one cantilever stiffening rib is located between two adjacent anchor stiffening ribs.

[0018] Optionally, the comb-tooth bridge expansion device also includes a drainage board, and both ends of the drainage board are respectively connected to the special-shaped steel on both sides of the bridge expansion joint.

[0019] Optionally, the drainage board has a V-shaped structure and is made of rubber material.

[0020] The comb-tooth type bridge expansion device of the embodiment of the present disclosure can reduce vibration and noise through the comb-tooth connecting plates, special-shaped steel, cantilever stiffening ribs and anchor stiffening ribs, and has a strong load-bearing capacity, is sturdy and durable, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a longitudinal cross-sectional schematic diagram of a comb-tooth type bridge expansion and contraction device according to an embodiment of the present disclosure;

[0022] Figure 2 A plan view of a comb-tooth connecting plate according to another embodiment of the present disclosure;

[0023] Figure 3 It is a bottom cross-sectional schematic diagram of a comb-tooth type bridge expansion and contraction device according to another embodiment of the present disclosure;

[0024] Figure 4 This is an enlarged view of a special-shaped steel structure according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1 and Figure 2 As shown, a comb-tooth type bridge expansion device comprises a comb-tooth connection plate 1, a special-shaped steel 2, a cantilever stiffening rib 3 and an anchor stiffening rib 4. The comb-tooth connection plate 1 is anchored at the two side beam ends of the bridge expansion joint respectively, and the comb teeth 11 of the comb-tooth connection plates 1 on both sides are intersected with each other and the socket gap gradually decreases. The special-shaped steel 2 is fixedly connected between the corresponding comb-tooth connection plate 1 and the bridge notch. A plurality of the cantilever stiffening ribs 3 are fixedly arranged at intervals on the outside of the comb-tooth connection plate 1 and the special-shaped steel 2. A plurality of the anchor stiffening ribs 4 are fixedly arranged at intervals on the inside of the comb-tooth connection plate 1 and the special-shaped steel 2. And the anchor stiffening rib 4 is fixedly connected to the embedded gate-shaped steel bar 5 in the corresponding bridge notch.

[0027] Specifically, Figure 1 and Figure 2 As shown, comb-tooth connecting plates 1 are anchored at the ends of the beams on both sides of the bridge expansion joint, and the comb teeth 11 of the two comb-tooth connecting plates 1 intersect with each other and the socket gap gradually decreases. The comb teeth of the comb-tooth connecting plates are arranged to intersect with each other and the socket gap gradually decreases, that is, the comb-tooth connecting plates are arranged in a tooth-shaped bite-type on both sides of the bridge expansion joint. Since the tooth plates of the expansion device are displaced or rotated with the center line of the expansion joint, the expansion and contraction of the beam body due to the change in ambient temperature causes the beam end to tilt due to the change in the beam span deflection, and the comb teeth of the comb-tooth connecting plates are arranged in a tooth-shaped bite-type, and the comb teeth do not touch each other, and have no effect on the structure. In addition, the comb-tooth connecting plates used are arranged in a tooth-shaped bite-type, and when the vehicle passes quickly, there is no gap when the wheel passes over the tooth plate, and no bumpy feeling is generated, that is, the vertical inertial impact force generated by the vehicle passing on the expansion device is reduced, and the vibration and noise generated when the vehicle passes are reduced, and the service life of the expansion device is increased.

[0028] The top of the special-shaped steel 2 is fixed to the bottom of the comb-tooth connecting plate 1, and the bottom of the special-shaped steel 2 is fixed to the bottom of the bridge notch. Multiple cantilever stiffening ribs 3 are fixed to the bottom of the comb-tooth connecting plate 1 and the outside of the special-shaped steel 2. Multiple anchor stiffening ribs 4 are fixed to the bottom of the comb-tooth connecting plate 1 and the inside of the special-shaped steel 2. In addition, the anchor stiffening ribs 4 are fixedly connected by the pre-buried gate-shaped steel bars 5 in the bridge notch.

[0029] The comb-tooth type bridge expansion device of the embodiment of the present invention is converted from a conventional "plate type" structural system to a "bracket type" structural system by arranging special-shaped steel, cantilever stiffening ribs and anchor stiffening ribs at the bottom of the comb-tooth connecting plate to form a bracket type structure. The comb-tooth type bridge expansion device can effectively increase the cross-sectional inertia moment and cross-sectional stiffness of the stress-bearing end of the expansion device, effectively reduce the warping deformation and fatigue resistance of the comb-tooth connecting plate caused by long-term impact loads, and significantly improve the service life of the expansion device.

[0030] For example, Figure 1 As shown, the anchoring stiffening rib 4 is connected to the corresponding pre-embedded gate-shaped steel bar 5 in the bridge notch by longitudinal steel bars. Thus, the comb-tooth bridge expansion device is connected to the bridge as a whole through the pre-embedded gate-shaped steel bar to form an integral force-bearing structure. As an example, Figure 1 As shown, the longitudinal reinforcement can be set to three. Of course, the longitudinal reinforcement can also be set to different numbers according to actual needs, and this embodiment does not make specific restrictions on this.

[0031] For example, Figure 1 As shown, the special-shaped steel 2 is connected to the corresponding comb-tooth connecting plate 1 and the bridge notch by penetration groove welding.

[0032] Furthermore, if Figure 1 and Figure 4 As shown, the special-shaped steel 2 is an inverted F-shaped steel. The cantilever stiffening rib 3 is connected to the angle formed by the corresponding comb-tooth connecting plate 1 and the outer side of the special-shaped steel 2 by penetration groove welding. The anchor stiffening rib 4 is connected to the angle formed by the corresponding comb-tooth connecting plate 1 and the inner side of the special-shaped steel 2 by penetration groove welding.

[0033] Specifically, Figure 1 and Figure 4 As shown, the comb-tooth connecting plate 1, the special-shaped steel 2, the cantilever stiffening rib 3 and the anchor stiffening rib 4 on each side are welded into an integral structure by a through-melt groove welding process to form a single comb-tooth side beam. Specifically, the inverted F-shaped steel is first welded to the bottom of the comb-tooth connecting plate 1, which is in a T-shape as a whole, forming a force-bearing skeleton of the comb-tooth side beam, and the through-melt groove welding process is adopted to enhance the overall force of the skeleton.

[0034] After the comb-tooth side beam skeleton is welded, the trapezoidal cantilever stiffening rib 3 is welded through the groove at the right angle formed by the lower part of each comb tooth 11 and the outer side of the special-shaped steel 2 to form a bracket form, which enhances the force strength of each comb tooth 11 and disperses the impact load of the cantilever end to the inverted F-shaped special-shaped steel 2. The hollow trapezoidal anchoring stiffening rib 4 is welded through the groove at the right angle formed by the comb-tooth connecting plate 1 and the inner side of the special-shaped steel 2, so that the comb-tooth side beam forms a three-dimensional integral force-bearing structure.

[0035] The comb-tooth bridge expansion device of the embodiment of the present disclosure adopts an integral structure to be anchored on the bridge component as a whole, uses the overall structure of the expansion device as a structural force system, abandons the traditional bolt connection form, avoids the disadvantage of easy detachment of the bolt structure, and effectively increases the service life of the expansion device.

[0036] For example, Figure 3 As shown, the plurality of cantilever stiffening ribs 3 correspond one-to-one to the comb teeth 11 of the comb-tooth connecting plate 1. The center lines of the anchoring stiffening ribs 4 and the cantilever stiffening ribs 3 are on the same straight line, and there is at least one cantilever stiffening rib 3 between two adjacent anchoring stiffening ribs 4. Such an arrangement can further enhance the overall structural stability of the telescopic device.

[0037] For example, Figure 1 As shown, the comb-tooth bridge expansion device also includes a drainage plate 6, and both ends of the drainage plate 6 are respectively connected to the special-shaped steel 2 on both sides of the bridge expansion joint.

[0038] Furthermore, the drainage board 6 is in a V-shaped structure, and the drainage board 6 is made of rubber material.

[0039] Specifically, Figure 1 and Figure 4 As shown, the waterproof measure adopted in the embodiment of the present disclosure is to install a rubber drainage board 6 in the slot of the inverted F-shaped special-shaped steel 2 to drain and prevent pollution. The rubber drainage board 6 is V-shaped as a whole, with a simple structure, and is easy to clean, maintain and replace. Therefore, it has a good waterproof effect, a low operation and maintenance rate, a long service life, and outstanding economic benefits.

[0040] In the embodiment of the present disclosure, the comb-tooth connecting plate 1, the special-shaped steel 2, the cantilever stiffening rib 3 and the anchor stiffening rib 4 are welded into an integral cantilever structure, namely the comb-tooth side beam, through the penetration groove welding process. The comb-tooth side beam is then connected to the embedded gate-shaped steel bar in the bridge notch, so that the comb-tooth bridge expansion device can reduce vibration and noise, has strong bearing capacity, is sturdy and durable, and is easy to maintain.

[0041] Typical embodiment 1: As shown in the attached Figures 1 to 4 As shown, the comb-tooth connecting plate 1, the special-shaped steel 2, the cantilever stiffening rib 3 and the anchor stiffening rib 4 are welded into an integral cantilever comb-tooth side beam by a penetration groove welding process, and the cantilever comb-tooth side beams are anchored at the beam ends on both sides of the bridge expansion joint.

[0042] The welding sequence of cantilever comb-tooth side beam is to first weld the comb-tooth connecting plate 1 and the special-shaped steel 2 into a T-shaped load-bearing frame. Then weld the cantilever stiffening rib 3 to the outside of the special-shaped steel 2 in the middle of the lower part of the comb-tooth 11 end of the comb-tooth connecting plate 1. The cantilever stiffening rib 3 is perpendicular to the special-shaped steel 2 and the comb-tooth connecting plate 1. Finally, weld the anchor stiffening rib 4 to the back of the special-shaped steel 2 under the tail of the comb-tooth connecting plate 1. The anchor stiffening rib 4 is perpendicular to the comb-tooth connecting plate 1 and the special-shaped steel 2 to form an integral three-dimensional load-bearing structure. After welding is completed, as shown in the attached figure Figure 3 As shown, the cantilever stiffening ribs 3 on both sides are arranged in a staggered manner, and the anchor stiffening ribs 4 are arranged at intervals and are located in a straight line with the cantilever stiffening ribs 3 .

[0043] like Figure 1 As shown, the cantilever comb-tooth side beam is anchored by pre-buried gate-shaped steel bars 5 in the bridge notch and three longitudinal anchor steel bars in the anchor stiffening rib 4, and connected to the beam body as a whole. The drainage board 6 is connected through the special-shaped steel 2 on both sides to drain water.

[0044] The comb-tooth bridge expansion device of the embodiment disclosed herein has an integral three-dimensional structure design, is easy to install, has a strong bearing capacity against repeated vehicle impacts, is durable, and has shock absorption and noise reduction.

[0045] Typical embodiment 2: The installation method of the comb-tooth bridge expansion device based on typical embodiment 1 is as follows:

[0046] 1. According to the measured temperature value, calculate the reserved gap width value for installing the comb-tooth bridge expansion device.

[0047] 2. Loft out the slot width on both sides of the beam end according to the drawing dimensions, and cut the slot according to the depth requirements of the drawing. The slot width and depth shall not be less than the drawing requirements.

[0048] 3. Fence off the construction area and provide safety warnings and diversion signs.

[0049] 4. Clean up the waste such as concrete, asphalt mixture, etc. in the groove.

[0050] 5. Correct the embedded gate-shaped steel bars 5 in the notch. If they are missing or damaged, supplement them with chemical anchoring according to the requirements of the drawing.

[0051] 6. Install the elevation positioning steel bars evenly in the slot according to the thickness and weight of the comb connecting plate 1. After installation, use a hanging line for correction to ensure accuracy.

[0052] 7. Install a thin steel formwork at the bottom of the slot and weld it firmly to prevent leakage during pouring.

[0053] 8. When hoisting the cantilever comb-tooth side beam, install the drainage board 6 first, and check the elevation, reserved seam width, straightness, etc. After they are accurate, insert the longitudinal anchor steel bars into the embedded door-shaped steel bars 5 and the anchor stiffening ribs 4 and tie them for positioning.

[0054] 9. After the installation is completed, check that there is no leakage in the joints of the components in the groove and then pour the high-performance concrete. Before pouring, sprinkle water to moisten the original groove. During pouring, the concrete should be vibrated to make it dense. After pouring, the surface should be finished and covered with water for maintenance for 14 days.

[0055] 10. After the maintenance period, the strength of the cast concrete in the slot shall be tested. The comb-tooth bridge telescopic device is a cantilever structure and traffic can only be opened when the strength reaches 100%.

[0056] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A comb-tooth bridge expansion device, characterized in that: The comb-tooth bridge expansion device comprises: Comb-tooth connection plates, the comb-tooth connection plates are respectively anchored at the ends of the beams on both sides of the bridge expansion joint, the comb teeth of the comb-tooth connection plates on both sides are crossed with each other and the socket gap gradually decreases; Special-shaped steel, the special-shaped steel is fixedly connected between the corresponding comb-tooth connecting plate and the bridge notch; Cantilever stiffening ribs, a plurality of cantilever stiffening ribs are fixedly arranged at intervals on the comb-tooth connecting plate and the outer side of the special-shaped steel; Anchoring stiffening ribs, wherein a plurality of the anchoring stiffening ribs are arranged at intervals on the inner side of the comb-tooth connecting plate and the special-shaped steel; and the anchoring stiffening ribs are fixedly connected to the embedded gate-shaped steel bars in the corresponding bridge notches.

2. The comb-tooth bridge expansion device according to claim 1, characterized in that: The anchoring stiffening rib is connected to the corresponding pre-buried gate-shaped steel bars in the bridge notch by passing longitudinal steel bars.

3. The comb-tooth bridge expansion device according to claim 1, characterized in that: The special-shaped steel is connected to the corresponding comb-tooth connecting plate and the bridge notch by penetration groove welding.

4. The comb-tooth bridge expansion device according to claim 1, characterized in that: The special-shaped steel is an inverted F-shaped steel.

5. The comb-tooth bridge expansion device according to claim 4, characterized in that: The cantilever stiffening rib is connected to the corresponding comb-tooth connecting plate and the angle formed by the outer side of the special-shaped steel by penetration groove welding.

6. The comb-tooth bridge expansion device according to claim 4, characterized in that: The anchoring stiffening rib is connected to the corresponding comb-tooth connecting plate and the inner side of the special-shaped steel at an angle formed by penetration groove welding.

7. The comb-tooth bridge expansion device according to claim 1, characterized in that: The cantilever stiffening rib is in a trapezoidal structure, and the anchoring stiffening rib is in a hollow trapezoidal structure.

8. The comb-tooth bridge expansion device according to any one of claims 1 to 7, characterized in that: The plurality of cantilever stiffening ribs correspond one to one with the comb teeth of the comb tooth connecting plate; The center lines of the anchor stiffening ribs and the cantilever stiffening ribs are on the same straight line, and at least one cantilever stiffening rib is located between two adjacent anchor stiffening ribs.

9. The comb-tooth bridge expansion device according to any one of claims 1 to 7, characterized in that: The comb-tooth bridge expansion device also includes a drainage plate, and the two ends of the drainage plate are respectively connected to the special-shaped steel on both sides of the bridge expansion joint.

10. The comb-tooth bridge expansion device according to claim 9, characterized in that: The drainage board has a V-shaped structure and is made of rubber material.

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