Rapid installation bridge expansion device based on steel box connection

Abstract

The utility model provides a rapid installation bridge expansion device based on steel box connection, the rapid installation bridge expansion device comprises comb plate units, steel box concrete, anchor bolts and a waterproof device, the two steel box concrete are respectively arranged at the end part of a bridge beam body at a beam end gap; the inner side of each steel box concrete is flush with the edge of the bridge body; the two ends of the comb plate unit are respectively erected on the steel box concrete and are fixedly connected with the steel box concrete through anchor bolts; a stud at the lower part of the anchor bolt penetrates through the steel box concrete and is connected with a bridge body; the waterproof device is arranged at the beam end gap, and the two ends of the waterproof device are fixedly connected with the inner side of the steel box concrete. The bridge expansion device is reasonable in structural arrangement, simple and rapid to install, short in installation period and capable of achieving rapid replacement, the installation and maintenance period of the expansion device is greatly shortened, and normal traffic requirements of a bridge are met.

Description

Technical field

[0001] The utility model relates to the technical field of bridge erection, in particular to a fast-installation bridge expansion device based on steel box connection. [Background Technology]

[0002] Bridge expansion joints are a crucial connecting component in bridge structures, ensuring both safe and comfortable driving while meeting the bridge's expansion and contraction requirements. In bridge engineering applications, expansion joints bear the repetitive impact of wheel loads and are exposed to the atmosphere for extended periods, creating harsh operating environments. Furthermore, they must adapt to the bridge's complex displacements, making them a vulnerable and difficult-to-repair component of the bridge structure, a persistent challenge in transportation construction and management.

[0003] Existing on-site installation of bridge expansion joints involves pre-reserving notches on both sides of the bridge joint and installing pre-buried rebar in these notches. When the bridge expansion joint is installed, the asphalt and temporary filler are cut and removed according to the notch size. The expansion joint is then hoisted into the expansion joint notch and welded to the desired position. Finally, concrete is poured into the expansion joint, and the concrete is cured for approximately seven days before traffic is allowed to flow.

[0004] The shortcomings of the existing bridge expansion device and installation method are:

[0005] (1) It is troublesome to clean the installation notch, which often damages the original embedded steel bars, and debris easily falls off the beam end;

[0006] (2) The concrete surface is uneven and there is a serious misalignment with the bridge deck pavement. Under the action of traffic impact load, tensile stress cracks are generated, causing the concrete anchoring area of ​​the expansion joint to crack and peel off.

[0007] (3) The damage to the expansion joint beam supporting components exacerbates the impact on the expansion joint. At the same time, the pipe maintenance is not in place and the expansion joint is not repaired in time, causing the steel components of the expansion device (special-shaped steel, etc.) to break;

[0008] (4) The position and size deviation of the embedded steel bars are large and cannot be directly welded to the telescopic device, which affects the anchoring strength of the telescopic device;

[0009] (5) The installation period is long and the process is complicated, which requires long periods of traffic interruption to wait for concrete curing, seriously affecting the bridge deck intersection construction work. [Utility Model Content]

[0010] The technical problem to be solved by the utility model is to provide a quick-install bridge expansion device based on steel box connection, which has a reasonable structure, is simple and quick to install, and has a short installation period, thus solving the technical problem that the traditional expansion device has a long installation and construction period and seriously affects the bridge deck intersection construction.

[0011] The utility model is achieved in this way:

[0012] A quick-install bridge expansion and contraction device based on a steel box connection, the quick-install bridge expansion and contraction device comprising a comb plate unit, steel box concrete, anchor bolts and a waterproof device, wherein the steel box concretes are respectively arranged at the ends of the bridge beam at the gaps at the beam ends, and the inner side of each steel box concrete is flush with the edge of the bridge beam; the two ends of the comb plate unit are respectively placed on the steel box concrete and fixedly connected to the steel box concrete by anchor bolts; the lower stud of the anchor bolt passes through the steel box concrete and is connected to the bridge beam; the waterproof device is arranged at the gaps at the beam ends, and the two ends are respectively fixedly connected to the inner side of the steel box concrete.

[0013] Furthermore, the steel box concrete includes a steel box and filling concrete, and the filling concrete is arranged inside the steel box; the steel box is composed of an inner steel plate, an upper steel plate with reserved bolt holes, a lower steel plate with reserved bolt holes and an outer steel plate, with openings reserved at both ends; the upper steel plate with reserved bolt holes and the lower steel plate with reserved bolt holes are both provided with bolt holes, and the lower stud of each anchor bolt passes through the corresponding bolt hole.

[0014] Furthermore, the outer edge of the inner steel plate of the steel box and the edge of the bridge beam are on the same plumb line.

[0015] Furthermore, a resin concrete layer is provided between the steel box concrete and the corresponding bridge beam.

[0016] Furthermore, the waterproof device includes two fixing members and a waterstop. The two fixing members are respectively fixed to the inner sides of the steel box concrete on the corresponding sides, and the two ends of the waterstop are respectively connected to the fixing members.

[0017] Furthermore, the middle of the anchor bolt is cylindrical, and the upper nut of the anchor bolt is flush with the upper edge of the comb plate unit.

[0018] The advantages of the present invention are:

[0019] This new design meets the multi-directional displacement requirements of bridges and offers simple and quick installation. All components of this design can be prefabricated in the factory and quickly assembled at the installation site, significantly shortening the installation period without impacting bridge deck intersection construction. This solves the technical problem of traditional expansion joints, which suffer from long installation periods and significant impacts on bridge deck intersection construction. It also avoids problems such as cracking and crushing of concrete in the anchoring area of ​​traditional expansion joints, extending the service life of the expansion joint and facilitating subsequent maintenance and repair.

[0020] In addition, the use of resin concrete to connect the steel box concrete and the bridge beam reduces energy transfer, concentrating damage on the expansion joint. Furthermore, the invention allows for quick replacement, significantly shortening the installation and maintenance cycle of the expansion joint, ensuring the bridge remains operational.

Brief Description of the Drawings

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the installation effect of a quick-install bridge expansion device based on steel box connection in the utility model.

[0023] Figure 2 This is a schematic diagram of the construction process A2 of a quick-install bridge expansion device based on steel box connection according to the present invention.

[0024] Figure 3 This is a schematic diagram after A4 of the construction process of a fast-installed bridge expansion device based on steel box connection in the utility model.

[0025] Figure 4 This is a schematic diagram of the construction process B1 of a quick-install bridge expansion device based on steel box connection according to the present invention.

[0026] Figure 5 This is a schematic diagram of the construction process B2 of a quick-install bridge expansion device based on steel box connection according to the present invention.

[0027] Description of reference numerals:

[0028] 1-Comb plate unit; 2-Anchor bolts; 3-Steel box concrete; 31-Steel box; 311-Inner steel plate; 312-Upper steel plate with reserved bolt holes; 313-Lower steel plate with reserved bolt holes; 314-Outer steel plate; 32-Filling concrete; 4-Waterproofing device; 41-Fixers; 42-Waterstop; 5-Resin concrete layer; 10-Bridge beam; 20-Bridge deck pavement; 30-Temporary baffle; 40-Spacing fixture; 50-Girder end gap. [Specific implementation method]

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] See also Figures 1 to 5 As shown, the utility model is a quick-install bridge expansion and contraction device based on steel box connection, the quick-install bridge expansion and contraction device includes a comb plate unit 1, an anchor bolt 2, a steel box concrete 3 and a waterproof device 4, the steel box concrete 3 are respectively arranged at the end of the bridge beam 10 at the beam end gap 50, and the inner side of each steel box concrete 3 is flush with the edge of the bridge beam 10; the two ends of the comb plate unit 1 are respectively placed on the steel box concrete 3, and are fixedly connected to the steel box concrete 3 by the anchor bolt 2; the lower stud of the anchor bolt 2 passes through the steel box concrete 3 and is connected to the bridge beam 10; the waterproof device 4 is arranged at the beam end gap 50, and the two ends are respectively fixedly connected to the inner side of the steel box concrete 3.

[0032] In a specific implementation, a preferred embodiment is: the steel box concrete 3 includes a steel box 31 and filling concrete 32, and the filling concrete 32 is arranged inside the steel box 31; the steel box 31 is composed of an inner steel plate 311, an upper steel plate 312 with reserved bolt holes, a lower steel plate 313 with reserved bolt holes and an outer steel plate 314, with openings reserved at both ends; the upper steel plate 312 with reserved bolt holes and the lower steel plate 313 with reserved bolt holes are both provided with bolt holes, and the lower stud of each anchor bolt 2 passes through the corresponding bolt hole.

[0033] In a specific implementation, a preferred embodiment is that the outer edge of the inner steel plate 311 of the steel box 31 and the edge of the bridge beam 10 are on the same plumb line.

[0034] In a specific implementation, a preferred embodiment is as follows: a resin concrete layer 5 is further provided between the steel box concrete 3 and the corresponding bridge beam 10 .

[0035] In a specific implementation, a preferred embodiment is: the waterproof device 4 includes two fixing parts 41 and a water stop 42, the two fixing parts 41 are respectively fixed on the inner side of the steel box concrete 42 on the corresponding sides, and the two ends of the water stop 42 are respectively connected to the fixing parts 41.

[0036] In a specific implementation, a preferred embodiment is as follows: the middle of the anchor bolt 2 is cylindrical, and the upper nut of the anchor bolt is flush with the upper edge of the comb plate unit 1.

[0037] In another embodiment of the present invention, during installation, bolt holes are reserved during the early construction of the bridge beam 10. During the later assembly and installation of the expansion device, the steel box concrete 3, the waterproof device 4, the comb plate unit 1, and the anchor bolts 2 are installed in sequence. The construction method includes the following steps:

[0038] A. Bolt holes are reserved for the bridge beam in the early stage, and paving requirements are:

[0039] A1. Reserve bolt holes when prefabricating or casting the beam;

[0040] A2. The gap 50 at the beam end is temporarily covered with a temporary baffle 30, and then the asphalt pavement is paved, and the thickness of the asphalt pavement is controlled to be uniform.

[0041] A3. Draw lines, cut grooves, and clean seams: Draw the installation groove position line according to the dimensions of the construction drawing, cut the asphalt pavement along the drawn line according to the depth of 20 of the bridge deck, and clean the asphalt and debris in the installation groove.

[0042] A4. Pour resin concrete, reserve bolt holes, and cure for 2-3 hours.

[0043] B. Install the expansion joint assembly components:

[0044] B1. Install the steel box concrete 3 onto the resin concrete layer 5 using the spacing fixture 40 to determine the spacing requirements, ensuring that the surface of the steel plate 312 with bolt holes reserved on the upper part of the steel box 31 is consistent with the design elevation;

[0045] B2. Ensure that the steel box concrete 3 is installed in place, remove the spacing fixture 40, weld the fixing piece 41 of the waterproof device 4 to the steel box 31, and then install the water stop 42;

[0046] B3. Hoist the comb plate unit 1 to the designed position and install the anchor bolts 2 to ensure that the telescopic device is firmly connected to the bridge beam. Figure 1 shown.

[0047] The steel box concrete 3 of the present invention cancels the connection form of the traditional expansion joint device using embedded steel bars, and fixes the steel box concrete 3 on the bridge beam 10 through the spacing fixing device 40 and the resin concrete layer 5, and then installs the comb plate unit 1 of the expansion joint device on the steel box concrete 3 through the anchor bolts 2, so that the expansion joint device is fixed on the bridge beam 10 as a whole, achieving the purpose of coordinated force between the displacement module and the support energy dissipation module; the steel box concrete 3 is formed by welding two non-perforated steel plates and two steel plates with reserved bolt holes, with openings at both ends and a hollow space formed inside holes, or cast as a whole; the steel box concrete 3 can be prefabricated in advance, and concrete is poured into the interior of the steel box from the openings at both ends, and bolt holes are reserved; the middle of the anchor bolt 2 is cylindrical, and the nut on the upper part of the bolt is parallel to the upper edge of the comb plate unit 1 to ensure driving stability. The lower stud of the anchor bolt 2 passes through the steel plate 313 with bolt holes reserved at the bottom of the steel box concrete 3 and the resin concrete layer 5, and is connected to the beam body; the resin concrete layer 5 is arranged between the steel box concrete 3 and the beam body for connecting the two, which can reduce the energy transfer between the two and protect the beam body.

[0048] Each component of the telescopic device is an independent assembled component and can be prefabricated in advance in the factory. After the steel box concrete is installed, the upper structure can be directly installed on the steel box concrete, which greatly shortens the installation period of the telescopic device.

[0049] In summary, the present invention meets the multi-directional displacement requirements of bridges and offers simple and quick installation. All components of the present invention can be prefabricated in the factory and quickly assembled at the telescopic device installation site, significantly shortening the installation period of the telescopic device without impacting bridge deck intersection construction. This solves the technical problem of traditional telescopic devices with long installation periods and severe impacts on bridge deck intersection construction. It also avoids problems such as cracking and crushing of concrete in the anchoring area of ​​traditional telescopic devices, extending the service life of the telescopic device and facilitating subsequent maintenance and repair work.

[0050] In addition, the use of resin concrete to connect the steel box concrete and the bridge beam reduces energy transfer, concentrating damage on the expansion joint. Furthermore, the invention allows for quick replacement, significantly shortening the installation and maintenance cycle of the expansion joint, ensuring the bridge remains operational.

[0051] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A quick-install bridge expansion device based on steel box connection, characterized by: The quick-install bridge expansion device includes a comb plate unit, steel box concrete, anchor bolts and a waterproof device. The steel box concretes are respectively arranged at the ends of the bridge beam at the gaps at the beam ends, and the inner side of each steel box concrete is flush with the edge of the bridge beam; the two ends of the comb plate unit are respectively placed on the steel box concrete and fixedly connected to the steel box concrete through anchor bolts; the lower stud of the anchor bolt passes through the steel box concrete and is connected to the bridge beam; the waterproof device is arranged at the gaps at the beam ends, and the two ends are respectively fixedly connected to the inner side of the steel box concrete.

2. A quick-install bridge expansion device based on steel box connection according to claim 1, characterized in that: The steel box concrete includes a steel box and filling concrete, and the filling concrete is arranged inside the steel box; the steel box is composed of an inner steel plate, an upper steel plate with reserved bolt holes, a lower steel plate with reserved bolt holes and an outer steel plate, with openings reserved at both ends; the upper steel plate with reserved bolt holes and the lower steel plate with reserved bolt holes are both provided with bolt holes, and the lower stud of each anchor bolt passes through the corresponding bolt hole.

3. A quick-install bridge expansion device based on steel box connection according to claim 2, characterized in that: The outer edge of the inner steel plate of the steel box and the edge of the bridge beam are on the same plumb line.

4. The fast-installation bridge expansion device based on steel box connection according to claim 1, characterized in that: A resin concrete layer is also provided between the steel box concrete and the corresponding bridge beam.

5. The fast-installation bridge expansion device based on steel box connection according to claim 1, characterized in that: The waterproof device includes two fixing parts and a waterstop. The two fixing parts are respectively fixed on the inner side of the steel box concrete on the corresponding sides, and the two ends of the waterstop are respectively connected to the fixing parts.

6. The fast-installation bridge expansion device based on steel box connection according to claim 1, characterized in that: The middle of the anchor bolt is cylindrical, and the nut on the upper part of the anchor bolt is flush with the upper edge of the comb plate unit.

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