Self-resetting bridge deck expansion joint device easy to replace

Abstract

The invention provides a self-resetting bridge floor expansion joint device easy to replace, belongs to the technical field of expansion joints, and solves the problems that in the prior art, disassembly and assembly are inconvenient, and a self-resetting function does not exist. The device comprises fixed tooth-shaped plates installed on the two bridge ends, a movable tooth-shaped plate is arranged between the two fixed tooth-shaped plates and connected with a force transmission block, dampers are detachably connected to the two sides of the force transmission block, and the ends, away from the force transmission block, of the dampers are detachably connected with the bridge ends. And a reset mechanism is detachably connected between the bridge end part and the force transfer block. The damper is arranged to absorb energy generated by relative displacement between the two bridge ends, the bridge floor is prevented from being damaged due to impact, the movable tooth-shaped plate can reduce a gap between the two fixed tooth-shaped plates, and driving safety is guaranteed. The resetting mechanism is used for resetting the damper after absorbing the energy so as to ensure the next use; the whole expansion joint device is in a detachable connection mode, so that the expansion joint device is convenient and rapid to install and replace.

Description

Technical Field

[0001] The invention belongs to the technical field of expansion joints, and in particular to an easily replaceable self-resetting bridge deck expansion joint device. Background Art

[0002] Bridge deck expansion joints refer to gaps usually set between two beam ends, between beam ends and abutments, or at the hinged position of the bridge to meet the deformation requirements of the bridge deck. The function of bridge deck expansion joints is to adjust the displacement and connection of the superstructure caused by vehicle loads and bridge construction materials. To achieve this purpose, expansion joint devices are usually set at the expansion joints of the bridge deck. Once they are damaged, it will seriously affect the speed, comfort and safety of driving, and may even cause safety accidents.

[0003] At present, the common practice of bridge expansion joints is to embed steel bars during the bridge paving, pour cement after the bridge solidifies, lay waterproof boards and cover plates before the cement solidifies, and then tighten them with nuts and welded bolts. This construction method has many disadvantages. The entire construction process requires welding on the bridge deck, which takes a lot of time, and the bridge deck construction site is affected by the environment, and the welding quality is difficult to guarantee; after welding, cement pouring is carried out, which is greatly affected by the environment, and winter construction affects the pouring quality; after cement pouring, it needs to be maintained for at least 7 days before it can be opened to traffic, which affects the construction progress; the maintenance cost of the entire structure is high, replacement and maintenance are inconvenient, and the service life is short; the existing expansion joint device is difficult to achieve the self-reset function. Therefore, it is necessary for the expansion joint to have the functions of rapid disassembly and self-reset, and to achieve effective control of bridge deck deformation under the premise of ensuring the overall stability of the structure, reduce the bridge deck displacement caused by driving impact, and prevent the bridge deck from being damaged by large stress caused by thermal expansion and contraction. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide an easily replaceable self-resetting bridge deck expansion joint device, in which a damper is arranged to absorb the energy generated by the relative displacement between the two bridge ends to avoid damage to the bridge deck due to impact; the movable toothed plate can reduce the gap between the two fixed toothed plates to ensure driving safety; the reset mechanism resets the damper after absorbing energy to ensure the next use; the entire expansion joint device is detachably connected, which is convenient and quick to install and replace.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A self-resetting bridge deck expansion joint device that is easily replaced comprises a fixed toothed plate installed on two bridge ends, a movable toothed plate cooperating with the fixed toothed plate is arranged between the two fixed toothed plates, the movable toothed plate is connected to a force transmission block, dampers are detachably connected to both sides of the force transmission block, one end of the damper away from the force transmission block is detachably connected to the bridge end, a reset mechanism is detachably connected between the bridge end and the force transmission block, and an end face of the bridge end is provided with an extension portion extending to below the force transmission block and in contact with the force transmission block.

[0007] Preferably, the reset mechanism comprises a guide rod with one end detachably connected to the bridge end, a reset spring is sleeved on the guide rod, and a guide hole cooperating with the guide rod is opened on the force transmission block.

[0008] Preferably, an elastic member abutting against the extension portion is provided at the bottom of the force transmission block, the diameter of the guide hole is larger than the diameter of the guide rod, and connecting seats are hinged at both ends of the damper. The two connecting seats are respectively detachably connected to the bridge end and the force transmission block.

[0009] Preferably, the elastic member is a spring.

[0010] Preferably, the end surface of the bridge end is detachably connected to a connecting plate, and the connecting plate is detachably connected to the damper and the reset mechanism.

[0011] Preferably, a plurality of plugs are provided on a side of the connection plate away from the force transmission block, and a plurality of sockets matching the plugs are provided on the end surface of the bridge end.

[0012] Preferably, a buffer pad is connected between the force transmission block and the movable toothed plate.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] A damper is set to absorb the energy generated by the relative displacement between the two bridge ends to avoid damage to the bridge deck due to impact. The movable toothed plate can reduce the gap between the two fixed toothed plates to ensure driving safety. The reset mechanism resets the damper after absorbing energy to ensure its next use. The entire expansion joint device is detachably connected to facilitate quick installation and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of a three-dimensional structure provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of a structure in which a movable toothed plate is omitted according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of an explosion structure provided by an embodiment of the present invention.

[0019] Figure markings: 1-movable toothed plate; 2-fixed toothed plate; 3-force transmission block; 4-bridge end; 401-extension portion; 5-connecting plate; 6-drainage groove; 7-damper; 8-reset spring; 9-guide rod; 10-connecting seat; 11-buffer pad; 12-elastic member; 13-guide hole; 14-jack; 15-plug. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Combine the following Figure 1-Figure 3 The present invention is described in detail.

[0024] Example

[0025] An easily replaceable self-resetting bridge deck expansion joint device comprises a fixed toothed plate 2 installed on two bridge ends 4, a movable toothed plate 1 cooperating with the fixed toothed plate 2 is arranged between the two fixed toothed plates 2, a force transmission block 3 is connected to the movable toothed plate 1, dampers 7 are detachably connected to both sides of the force transmission block 3, one end of the damper 7 away from the force transmission block 3 is detachably connected to the bridge end 4, a reset mechanism is detachably connected between the bridge end 4 and the force transmission block 3, and an extension portion 401 extending to the bottom of the force transmission block 3 and contacting the force transmission block 3 is arranged on the end surface of the bridge end 4. The fixed toothed plate 2 is detachably connected to the bridge end 4 by a screw.

[0026] The damper 7 absorbs the impact energy between the force transmission block 3 and the bridge end 4. After absorbing the energy, the reset mechanism resets the damper 7. The two sides of the movable toothed plate 1 on the top of the force transmission block 3 are engaged with the fixed toothed plate 2. When the two bridge ends 4 move horizontally relative to each other, the gap between the two bridge ends 4 is controlled to ensure driving safety. The two extensions 401 are separated by a certain distance so that the two bridge ends 4 can move relative to each other.

[0027] When the two bridge decks are displaced due to external factors such as vehicle loads, wind loads, and earthquake loads, if the expansion device of the present application does not provide self-resetting capability, the bridge decks on both sides of the expansion joint may become unstable or partially damaged due to uneven force due to excessive displacement, thereby causing driving discomfort and even safety accidents.

[0028] The reset mechanism includes a guide rod 9 with one end detachably connected to the bridge end 4, a reset spring 8 is sleeved on the guide rod 9, and a guide hole 13 cooperating with the guide rod 9 is opened on the force transmission block 3. The reset spring 8 is a compression spring, and both ends thereof are abutted to avoid tensile deformation and loss of elasticity. The reset spring 8 generates elastic force through its own deformation, thereby resetting the damper 7. At the same time, during the compression process of the reset spring 8, it can also cooperate with the damper 7 to absorb energy and reduce vibration; the guide rod 9 provides a guiding function for the reset spring 8 to avoid the reset spring 8 from bending and deformation and damage during the compression process. In the normal state, the end of the guide rod 9 does not abut against the inner end face of the guide hole 13 to ensure that the guide rod 9 can slide freely in the guide hole 13.

[0029] The bottom of the force transmission block 3 is provided with an elastic member 12 that abuts against the extension portion 401. The diameter of the guide hole 13 is larger than the diameter of the guide rod 9. The two ends of the damper 7 are hinged with connecting seats 10. The two connecting seats 10 are detachably connected to the bridge end 4 and the force transmission block 3 respectively. The force transmission block 3 abuts against the extension portion 401 through the elastic member 12. When the movable toothed plate 1 is squeezed by the impact of driving, it can move downward and compress the elastic member 12. The elastic member 12 absorbs the energy of the driving impact to avoid bending and deformation of both sides of the movable toothed plate 1, which causes it to tilt upward and affect driving safety. The connection seat 10 is provided so that the damper 7 can move with the up and down movement of the force transmission block 3. After the diameter of the guide hole 13 is larger than the diameter of the guide rod 9, the guide rod 9 can also adapt to the up and down movement of the force transmission block 3, and the guide hole 13 can also be set as a vertical strip jack.

[0030] The elastic member 12 is a spring, and the elastic member 12 can also be buffered by a rubber pad.

[0031] The end surface of the bridge end 4 is detachably connected with a connecting plate 5, and the connecting plate 5 is detachably connected with the damper 7 and the reset mechanism. The connecting plate 5 can be provided to disassemble and assemble the damper 7 and the reset mechanism at the same time, which is convenient and quick.

[0032] A plurality of plugs 15 are provided on the side of the connection plate 5 away from the force transmission block 3, and a plurality of sockets 14 matching the plugs 15 are provided on the end surface of the bridge end 4. After the plugs 15 are inserted into the sockets 14, the connection strength between the entire telescopic device and the bridge end 4 can be improved. When the two bridge ends 4 are displaced and interlayer shear force is generated, it is not easy to shear the connection bolts between the connection plate 5 and the bridge end 4, thereby improving the reliability of the connection between the entire device and the bridge deck.

[0033] A buffer pad 11 is connected between the force transmission block 3 and the movable toothed plate 1. The buffer pad 11 cooperates with the elastic member 12 and the deflection of the movable toothed plate 1 itself to prevent the two ends of the movable toothed plate 1 from tilting up to affect driving safety.

[0034] A drainage groove 6 is provided on the upper surface of the bridge end 4, and the drainage groove 6 is located at the junction of the fixed tooth-shaped plate 2 and the movable tooth-shaped plate 1. The drainage groove 6 discharges rainwater flowing into the comb teeth.

[0035] The detachable connections of the present application are all connected by bolts, and all parts are prefabricated components, which brings convenience, flexibility and replaceability to subsequent construction, thereby improving construction efficiency and the ease of subsequent maintenance.

[0036] At present, bridge shock absorption is mainly achieved by reducing the horizontal strain transmission of the upper structure through laminated rubber bearings, thereby reducing the seismic response of the structure. The horizontal shock absorption capacity of the laminated rubber bearings is weakened when under pressure. The expansion joint device of the present application is coupled with the laminated rubber bearings to ensure that the laminated rubber bearings do not fail due to the earthquake when encountering an earthquake, thereby reducing unnecessary troubles caused by post-earthquake repairs.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, 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 easily replaceable self-resetting bridge deck expansion joint device, comprising a fixed toothed plate (2) mounted on two bridge ends (4), characterized in that: A movable toothed plate (1) matched with the fixed toothed plate (2) is arranged between the two fixed toothed plates (2); the movable toothed plate (1) is connected to a force transmission block (3); dampers (7) are detachably connected to both sides of the force transmission block (3); one end of the damper (7) away from the force transmission block (3) is detachably connected to the bridge end (4); a reset mechanism is detachably connected between the bridge end (4) and the force transmission block (3); and an extension portion (401) extending to the bottom of the force transmission block (3) and in contact with the force transmission block (3) is arranged on the end surface of the bridge end (4).

2. The easily replaceable self-resetting bridge deck expansion joint device according to claim 1, characterized in that: The reset mechanism comprises a guide rod (9) having one end detachably connected to the bridge end (4), a reset spring (8) is sleeved on the guide rod (9), and a guide hole (13) cooperating with the guide rod (9) is provided on the force transmission block (3).

3. The easily replaceable self-resetting bridge deck expansion joint device according to claim 2, characterized in that: The bottom of the force transmission block (3) is provided with an elastic member (12) abutting against the extension portion (401); the diameter of the guide hole (13) is larger than the diameter of the guide rod (9); connecting seats (10) are hinged at both ends of the damper (7); and the two connecting seats (10) are detachably connected to the bridge end portion (4) and the force transmission block (3), respectively.

4. The easily replaceable self-resetting bridge deck expansion joint device according to claim 3, characterized in that: The elastic member (12) is a spring.

5. The easily replaceable self-resetting bridge deck expansion joint device according to claim 1, characterized in that: The end surface of the bridge end (4) is detachably connected to a connecting plate (5), and the connecting plate (5) is detachably connected to a damper (7) and a reset mechanism.

6. The easily replaceable self-resetting bridge deck expansion joint device according to claim 5, characterized in that: A plurality of plugs (15) are arranged on one side of the connection plate (5) away from the force transmission block (3), and a plurality of sockets (14) matching the plugs (15) are arranged on the end surface of the bridge end (4).

7. The easily replaceable self-resetting bridge deck expansion joint device according to claim 1, characterized in that: A buffer pad (11) is connected between the force transmission block (3) and the movable toothed plate (1).

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