A bridge expansion joint connection device and its construction method

Abstract

The application relates to the technical field of bridge expansion joints, in particular to a bridge expansion joint connecting device and a construction method thereof, which comprises special-shaped steel bars connected with left and right beam bodies, and the special-shaped steel bars on the left and right sides are connected through upper assemblies and lower assemblies; sliding rails are arranged on the horizontal planes of the special-shaped steel bars on the left and right sides, and nuts are embedded in the sliding rails; recesses are arranged at the lower ends of the special-shaped steel bars on the left and right sides, and shells are arranged in the recesses; the upper assembly comprises a first upper pressing plate, a second upper pressing plate, a third upper pressing plate and a fourth upper pressing plate, the first upper pressing plate, the second upper pressing plate, the third upper pressing plate and the fourth upper pressing plate are sequentially connected through a screw rod from left to right, and the outer side ends of the first upper pressing plate and the fourth upper pressing plate are connected with the nuts in the sliding rails on the special-shaped steel bars on the left and right sides through screws. The application can change different angles according to the deformation of the bridge and the driving change of the vehicle, so as to adapt to the situation, effectively avoid the harm of expansion joint height difference and bridge head bumping, and increase the service life of the device.

Description

Technical Field

[0001] This invention relates to the field of bridge expansion joint technology, and in particular to a bridge expansion joint connection device and its construction method. Background Technology

[0002] Bridge expansion joints are joints installed between the ends of two beams, between a beam end and an abutment, or at hinged joints of the bridge to accommodate bridge deck deformation. These joints must allow free expansion and contraction in both directions parallel and perpendicular to the bridge axis, be robust and reliable, and ensure a smooth ride for vehicles without bumps or noise. Bridge expansion joints are used to regulate displacement and connections between the superstructure caused by vehicle loads and bridge construction materials. However, existing technologies have the following problems:

[0003] (1) Considering that bridges need a certain amount of space to move when they expand and contract with heat and deform, the bridge expansion joints will have a certain gap. This gap often causes a certain amount of bumps when facing vehicles, affecting the comfort of vehicles passing through. If the expansion joint is deformed too much due to the bridge, it will also easily trap tires with a wide main tire and a small wheel diameter, causing certain damage to small and medium-sized vehicles. After a long period of traffic, the gap is easily filled with debris.

[0004] (2) The existing method of fixing bridge expansion joints is cement fixing. Cement takes time to solidify, and the road cannot be opened to traffic during this time, which will affect normal traffic flow.

[0005] (3) After a period of use, the expansion joints of the bridge may form a certain height difference. This is due to the settlement of the abutment, installation error and the cracking of the bearing pad stone, which causes one side of the bridge to be lower than the side of the road surface, resulting in a bridge approach jump. The expansion joints will also be damaged by the impact load generated by the bridge approach jump phenomenon.

[0006] (4) The rubber waterstop installed in the expansion joint may be damaged due to loosening of the rivets, deformation or breakage of the rubber plate, etc., which may further cause other hazards such as water seepage in the expansion joint. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bridge expansion joint connection device and its construction method. This device can adapt to different angles caused by bridge deformation and vehicle movement, effectively avoiding hazards such as expansion joint height differences and bridge approach slab settlement, and greatly increasing the service life of the device.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A bridge expansion joint connection device includes special-shaped steel connected to the beams on the left and right sides. The special-shaped steel on the left and right sides is symmetrically arranged and connected to each other by an upper component and a lower component.

[0010] Slide rails are provided on the horizontal surfaces of the irregular steel on both the left and right sides, and nuts are embedded in the slide rails; grooves are provided at the lower ends of the irregular steel on both the left and right sides, and outer shells are provided in the grooves.

[0011] The upper assembly includes a first upper pressure plate, a second upper pressure plate, a third upper pressure plate, and a fourth upper pressure plate. The first upper pressure plate, the second upper pressure plate, the third upper pressure plate, and the fourth upper pressure plate are connected sequentially from left to right by screws. The middle parts of the first upper pressure plate and the fourth upper pressure plate are connected to nuts in the slide rails on the left and right sides of the profiled steel by screws, so that the first upper pressure plate, the second upper pressure plate, the third upper pressure plate, and the fourth upper pressure plate can slide freely in the slide rails on the left and right sides of the profiled steel.

[0012] The lower assembly includes a first lower pressure plate and a second lower pressure plate connected to the irregular steel on the left and right sides. The outer shell is provided with a spring and a telescopic rod. The spring is sleeved on the telescopic rod. The outer ends of the first lower pressure plate and the second lower pressure plate are connected to the telescopic rod inside the outer shell of the irregular steel on the left and right sides, so that the first lower pressure plate and the second lower pressure plate can freely extend and retract within the outer shell as the upper assembly moves.

[0013] Preferably, the bridge expansion joint connection device further includes multiple support rods, which are arranged in a crisscross pattern. The multiple support rods are connected to a cross-shaped rotating rod by screws. The top of each support rod is connected to the middle position of the second upper pressure plate and the third upper pressure plate of the upper component, respectively. The bottom of each support rod is connected to the inner end of the first lower pressure plate and the second lower pressure plate of the lower component, respectively.

[0014] Preferably, rubber strips are provided on the outer ends of the irregular steel upper slide rails on both the left and right sides.

[0015] The present invention also provides a construction method for a bridge expansion joint connection device, comprising the following steps:

[0016] Step 1: Connect the first upper pressure plate, the second upper pressure plate, the third upper pressure plate and the fourth upper pressure plate of the upper component in sequence with screws to form a freely rotatable connecting rod;

[0017] Step 2: Fix the middle of the first upper pressure plate and the fourth upper pressure plate to the irregular steel on the left and right sides with screws; wherein, a row of slide rails is prefabricated on the irregular steel on the left and right sides and nuts are embedded, and the screws are connected to the nuts so that the first upper pressure plate, the second upper pressure plate, the third upper pressure plate and the fourth upper pressure plate can slide freely in the slide rails on the irregular steel on the left and right sides.

[0018] Step 3: Fix rubber strips to the outer ends of the slide rails on the left and right sides of the irregular steel, so that the nuts are cushioned when they slide inside the slide rails.

[0019] Step 4: A row of support rods is fixedly connected to the bottom of the second and third upper pressure plates using screws, so that the support rods can rotate freely within a certain range;

[0020] Step 5: Connect the support rods below the second and third upper pressure plates with screws so that they intersect to form a cross-shaped rotating rod, and connect the bottom of the support rods to the lower component with screws.

[0021] Step 6: Cut grooves at the lower ends of the irregular steel on the left and right sides, weld the outer shell in the grooves, and pre-fix a row of springs and telescopic rods in the outer shell. Fix the outer ends of the first and second lower pressure plates of the lower assembly to the telescopic rods.

[0022] Step 7: Connect the bottom of the support rod to the inner ends of the first and second lower pressure plates using screws. Under the action of the support rod, the first and second lower pressure plates can freely extend and retract within the housing as the upper component moves.

[0023] Step 8: Finally, fix the irregular steel on the left and right sides to the beams on the left and right sides to complete the installation.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention utilizes a screw connection method, allowing the connected pressure plates to form different angles within a certain range to adapt to bridge deformation. This not only prevents water seepage from the expansion joint but also alleviates the bumps caused by vehicles passing through the expansion joint.

[0026] 2. The present invention uses a pressure plate connection method to make it flush with the road surface, which can avoid dangerous phenomena such as tire jamming when small and medium-sized vehicles pass through. In addition, the pressure plate connection method can also prevent the accumulation of debris in the expansion joint and extend the service life of the device.

[0027] 3. This invention utilizes the slide rail of the special-shaped steel and the pre-set nut, and uses the pressure plate connected to the screw to slide freely on the special-shaped steel on both sides, adapting to the expansion (compression) of the expansion joint to both sides, thereby replacing the connection function of the rubber waterstop for the expansion joint; at the same time, it effectively avoids the hazards of expansion joint height difference, bridge approach slab settlement, etc., and greatly increases the service life of the device.

[0028] 4. This invention is simple to assemble, has low construction costs and a short construction period, and the parts are easy to replace, ensuring that the replacement of some damaged parts will not affect normal traffic. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the single-sided connection structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the installation of the nut and slide rail in this invention;

[0032] Figure 4 This is a schematic diagram of the installation of the upper component in this invention;

[0033] Figure 5 This is a schematic diagram of the installation of the connecting rod in this invention;

[0034] Figure 6 This is a schematic diagram of the installation of the lower component in this invention;

[0035] Figure 7 This is a schematic diagram of the deformation process of the present invention;

[0036] Figure 8 This is a diagram illustrating different states of a vehicle while it is in motion. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the scope of protection of the present invention. The embodiments described in this invention are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Reference Figure 1-8 A bridge expansion joint connection device includes irregular steel 10 connected to the beams on the left and right sides. The irregular steel 10 on the left and right sides are symmetrically arranged and connected to each other by an upper component and a lower component.

[0039] Among them, the horizontal surfaces of the irregular steel 10 on both the left and right sides are provided with slide rails, and nuts 4 are embedded in the slide rails; the lower ends of the irregular steel 10 on both the left and right sides are provided with grooves, and outer shells 9 are provided in the grooves.

[0040] The upper assembly includes a first upper pressure plate 1-1, a second upper pressure plate 1-2, a third upper pressure plate 1-3, and a fourth upper pressure plate 1-4. The first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3, and the fourth upper pressure plate 1-4 are connected from left to right by screws 2. The middle parts of the first upper pressure plate 1-1 and the fourth upper pressure plate 1-4 are connected to nuts 4 in the slide rails on the left and right sides of the profiled steel 10 by screws 3, so that the first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3, and the fourth upper pressure plate 1-4 can slide freely in the slide rails on the left and right sides of the profiled steel 10.

[0041] The lower assembly includes a first lower pressure plate 1-5 and a second lower pressure plate 1-6 connected to the irregular steel 10 on the left and right sides. The outer shell 9 is provided with a spring 7 and a telescopic rod 8. The spring 7 is sleeved on the telescopic rod 8. The outer ends of the first lower pressure plate 1-5 and the second lower pressure plate 1-6 are connected to the telescopic rod 8 inside the outer shell 9 on the irregular steel 10 on the left and right sides, so that the first lower pressure plate 1-5 and the second lower pressure plate 1-6 can freely extend and retract within the outer shell 9 as the upper assembly moves.

[0042] Specifically, the bridge expansion joint connection device also includes multiple support rods 6, which are arranged in a crisscross pattern. The multiple support rods 6 are connected to a cross-shaped rotating rod by screws 2. The top of each support rod 6 is connected to the middle position of the second upper pressure plate 1-2 and the third upper pressure plate 1-3 of the upper component, and the bottom of each support rod 6 is connected to the inner end of the first lower pressure plate 1-5 and the second lower pressure plate 1-6 of the lower component.

[0043] Specifically, rubber strips 5 are provided on the outer ends of the slide rails on both the left and right sides of the irregular steel 10, so that the nut 4 is cushioned when it slides in the slide rail.

[0044] In this embodiment, the screw 2 is used to connect the first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3, and the fourth upper pressure plate 1-4, allowing them to form different angles within a certain range. This adapts to bridge deformation while preventing water seepage into the expansion joint and mitigating the bumps caused by vehicles passing through it. Furthermore, by connecting the first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3, and the fourth upper pressure plate 1-4 sequentially to ensure they are flush with the road surface, it avoids dangerous situations such as tire jams when small and medium-sized vehicles pass through. The pressure plate connection also prevents debris from accumulating in the expansion joint, extending the device's service life. Here, the slide rail of the profiled steel 10 and the pre-placed nuts 4 are used, with the screw 3 and the pressure plate connected to it sliding freely on the profiled steel on both sides, adapting to the expansion (compression) of the expansion joint to both sides. This replaces the connection function of the rubber waterstop for the expansion joint; it also effectively avoids hazards such as height differences at the expansion joint and bridge approach slab settlement, greatly increasing the device's service life.

[0045] A construction method for a bridge expansion joint connection device includes the following steps:

[0046] Step 1: Connect the first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3 and the fourth upper pressure plate 1-4 of the upper component in sequence by screw 2 to form a freely rotatable connecting rod;

[0047] Step 2: Fix the middle of the first upper pressure plate 1-1 and the fourth upper pressure plate 1-4 to the irregular steel 10 on the left and right sides with screws 3; wherein, a row of slide rails is prefabricated on the irregular steel 10 on the left and right sides and nuts 4 are embedded in them, and the screws 3 are connected to the nuts 4, so that the first upper pressure plate 1-1, the second upper pressure plate 1-2, the third upper pressure plate 1-3 and the fourth upper pressure plate 1-4 can slide freely in the slide rails on the irregular steel 10 on the left and right sides;

[0048] Step 3: Fix rubber strips 5 to the outer ends of the slide rails on the left and right sides of the irregular steel 10, so that the nut 4 is cushioned when it slides in the slide rail.

[0049] Step 4: A row of support rods 6 are fixedly connected to the bottom of the second upper pressure plate 1-2 and the third upper pressure plate 1-3 using screws 2, so that the support rods 6 can rotate freely within a certain range;

[0050] Step 5: Connect the support rods 6 below the second upper pressure plate 1-2 and the third upper pressure plate 1-3 with screws 2 so that they intersect to form a cross-shaped rotating rod, and connect the bottom of the support rods 6 to the lower component with screws 2.

[0051] Step 6: Open grooves at the lower ends of the irregular steel 10 on the left and right sides, weld the outer shell 9 in the grooves, and pre-fix a row of springs 7 and telescopic rods 8 in the outer shell 9. Fix the outer ends of the first lower pressure plate 1-5 and the second lower pressure plate 1-6 of the lower assembly to the telescopic rods 8.

[0052] Step 7: Connect the bottom of the support rod 6 to the inner ends of the first lower pressure plate 1-5 and the second lower pressure plate 1-6 using screws 2. Under the action of the support rod 6, the first lower pressure plate 1-5 and the second lower pressure plate 1-6 can freely extend and retract within the outer shell 9 as the upper component moves.

[0053] Step 8: Finally, fix the irregular steel 10 on the left and right sides to the beams on the left and right sides to complete the installation.

[0054] In this embodiment, the above-mentioned assemblable structure is adopted, and all standard parts used can be purchased from the market. The specific connection methods of each part adopt conventional methods in the prior art, and the construction period during assembly is short, ensuring that the replacement of some damaged parts will not affect normal traffic.

[0055] The descriptions and practices disclosed in this invention are readily apparent and understandable to those skilled in the art, and various modifications and refinements can be made without departing from the principles of this invention. Therefore, any modifications or improvements made without departing from the spirit of this invention should also be considered within the scope of protection of this invention.

Claims

1. A bridge joint connection device, characterized in that, The left and right profile steels are symmetrically arranged, and the left and right profile steels are connected through the upper assembly and the lower assembly. The horizontal plane of the left and right profile steels is provided with sliding rails, and nuts are embedded in the sliding rails. The upper assembly comprises a first upper pressing plate, a second upper pressing plate, a third upper pressing plate and a fourth upper pressing plate, which are sequentially connected by a screw rod. The middle part of the first upper pressing plate and the fourth upper pressing plate is connected with the nuts in the sliding rails on the left and right profile steels by screws, so that the first upper pressing plate, the second upper pressing plate, the third upper pressing plate and the fourth upper pressing plate can freely slide in the sliding rails on the left and right profile steels. The lower assembly comprises a first lower pressing plate and a second lower pressing plate connected with the left and right profile steels.

2. A bridge expansion joint connecting device according to claim 1, characterised in that The outer side end of the sliding rail on the left and right profile steels is provided with a rubber strip.

3. The method of claim 1 or 2, wherein the method further comprises: The steps are as follows: Step 1, sequentially connect the first upper pressing plate, the second upper pressing plate, the third upper pressing plate and the fourth upper pressing plate of the upper assembly by the screw rod, and form a freely rotating connecting rod; Step 2, fix the middle part of the first upper pressing plate and the fourth upper pressing plate on the left and right profile steels by screws; wherein a row of sliding rails are pre-made on the left and right profile steels and nuts are embedded, and the screws are connected with the nuts, so that the first upper pressing plate, the second upper pressing plate, the third upper pressing plate and the fourth upper pressing plate can freely slide in the sliding rails on the left and right profile steels; Step 3, fix and install rubber strips on the outer side end of the sliding rail on the left and right profile steels, so that the nuts are subjected to a certain buffering action when sliding in the sliding rail; Step 4, fix a row of support rods below the second upper pressing plate and the third upper pressing plate by a screw rod, so that the support rods can freely rotate within a certain range; Step 5, connect the support rods below the second upper pressing plate and the third upper pressing plate by a screw rod, so as to form a cross-shaped rotating rod by crossing each other, and connect the bottom of the support rod with the lower assembly by a screw rod; Step 6, open a groove at the lower end of the left and right profile steels, weld a shell in the groove, and pre-fix a row of springs and telescopic rods in the shell, and fix the outer side end of the first lower pressing plate and the second lower pressing plate of the lower assembly with the telescopic rods. Step 7, the bottom of the support rod is connected with the inner end of the first and second lower pressing plates by a screw rod, and under the action of the support rod, the first and second lower pressing plates can freely stretch and shrink in the shell along with the action of the upper assembly; Step 8, finally, the profiled steel on the left and right sides is fixed on the beam body on the left and right sides, and the installation is completed.

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