Bridge expansion joint device and bridge assembly thereof

Abstract

The application relates to a bridge expansion joint device and a bridge assembly thereof, which comprises a bearing support, a fixed rib, a movable rib and a pre-tightening device, the fixed rib and the bearing support are arranged on the two sides of the bridge expansion joint along the longitudinal direction of the bridge; the movable rib is connected with the bearing support at one end along the longitudinal direction of the bridge, and the other end extends to the side of the fixed rib and is movably connected with the fixed rib; a mounting space is formed between the movable rib and the fixed rib, the movable rib comprises a vertical rib plate extending to the bottom of the mounting space; the pre-tightening device is arranged in the mounting space and abuts between the vertical rib plate and the fixed rib to apply a transverse pressure to the vertical rib plate. In the application, the pre-tightening device abuts between the movable rib and the fixed rib, and the pre-tightening device applies a transverse pressure to the movable rib, thereby providing a vertical sliding friction resistance for the movable rib, inhibiting the vertical vibration of the movable rib when a vehicle passes through the device, improving the vibration characteristics of the device, reducing the noise and reducing the structural fatigue damage caused by the vibration.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a bridge expansion joint device and a bridge assembly thereof. Background Art

[0002] Bridge expansion joints are installed between beam ends and between beam ends and abutments. They primarily accommodate longitudinal expansion and contraction of the bridge, while also accommodating lateral displacement, vertical rotation, and transverse rotation. Currently, the most commonly used expansion joints are steel section expansion joints and comb-tooth expansion joints.

[0003] Both types of expansion joints are primarily constructed of steel, with the thickness increasing proportionally with longitudinal expansion displacement. This results in high installation costs, and the steel expansion joints have large load spans and require a high steel consumption. Furthermore, the main structures of these bridge expansion joints are large and discontinuous, resulting in noise and high impact loads when vehicles pass through them, as well as insufficient fatigue resistance, impacting the living comfort of surrounding residents. Summary of the Invention

[0004] The embodiments of the present application provide a bridge expansion joint device and a bridge assembly thereof to solve the problems of high noise levels and insufficient fatigue performance of existing devices in the related art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: In the first aspect, a bridge expansion joint device is provided, which includes: a bearing support, a fixed rib, a movable rib and a pre-tightening device, wherein the fixed rib and the bearing support are used to be erected on both sides of the bridge expansion joint along the longitudinal direction of the bridge; along the longitudinal direction of the bridge, one end of the movable rib is used to be connected to the bearing support, and the other end extends toward one side of the fixed rib and is movably connected to the fixed rib, and an installation space is formed between the movable rib and the fixed rib, and the movable rib includes a vertical rib plate extending toward the bottom of the installation space; the pre-tightening device is arranged in the installation space, and the pre-tightening device is held between the vertical rib plate and the fixed rib to apply lateral pressure to the vertical rib plate.

[0006] In some embodiments, the pre-tightening device includes an elastic member, which is arranged along the transverse bridge and is supported between the vertical rib and the fixed rib. The height of the elastic member is greater than the distance between the movable rib and the fixed rib.

[0007] In some embodiments, the pre-tightening device further includes a sliding pair, and the sliding pair is disposed between the elastic member and the fixed rib.

[0008] In some embodiments, the movable ribs include: multiple open ribs and a top plate, the open ribs include horizontal ribs, the horizontal ribs are fixed to the bottom ends of the vertical ribs; the top plate is arranged between the top ends of the multiple open ribs, and the top plate is used to cover the expansion joints of the bridge.

[0009] In some embodiments, the movable rib further includes a prestressed member connected to the top plate so that the top plate forms a pre-camber at the location of the bridge expansion joint.

[0010] In some embodiments, the prestressed member includes a tensioning portion, the two sides of the top end of the opening rib are connected to the bottom end of the top plate, the prestressed member is horizontally arranged, and the two ends of the prestressed member are connected to the two ends of the opening rib, and the length of the tensioning portion is less than the distance between the two ends of the opening rib; or, the prestressed member is vertically arranged between the bottom end of the top plate and the top end of the opening rib, and the height of the prestressed member is greater than the distance between the bottom end of the top plate and the top end of the opening rib.

[0011] In some embodiments, a side of the bottom end of the opening rib close to the fixed rib is bent toward the top plate to form an arc transition curve.

[0012] In some embodiments, there are multiple fixed ribs, the fixed ribs and the opening ribs are staggered, and the fixed ribs are located at the bottom of the top plate; or, along the transverse bridge direction, a plurality of spaced-apart installation spaces are opened on the fixed ribs, one end of the opening rib extends into the interior of the installation space, and there is a gap between the bottom end of the opening rib and the bottom end of the inner wall of the installation space.

[0013] In some embodiments, anti-skid grooves are provided on the top plate at equal intervals along the transverse direction of the bridge; or, the top plate is paved with concrete.

[0014] In some embodiments, the bearing support includes: a force measuring support and a support box, the force measuring support is provided with a force sensor; the support box is fixed to the top of the force measuring support, and one side of the support box is connected to the movable rib.

[0015] In some embodiments, the fixing rib includes: a shell and concrete, and the concrete is filled in the shell.

[0016] In a second aspect, a bridge assembly is provided, comprising: a bridge expansion joint device assembly and multiple lanes, wherein the bridge expansion joint device assembly comprises the bridge expansion joint device as described above; a bridge expansion joint is provided on each lane, and a bridge expansion joint device assembly is installed at the position of the bridge expansion joint on each lane, and the width of the bridge expansion joint device assembly on each lane is the same as the width of each lane.

[0017] In some embodiments, the bridge expansion joint device assembly includes one bridge expansion joint device, and the width of the bridge expansion joint device on each lane is the same as the width of each lane; the bridge expansion joint device assembly includes multiple bridge expansion joint devices, and the sum of the widths of the multiple bridge expansion joint devices on each lane is the same as the width of each lane.

[0018] The beneficial effects of the technical solution provided by this application include:

[0019] An embodiment of the present application provides a bridge expansion joint device and a bridge assembly thereof, wherein a pre-tightening device is abutted between a movable rib and a fixed rib, and lateral pressure is applied to the movable rib through the pre-tightening device, thereby providing a vertical sliding friction resistance to the movable rib, which can suppress the vertical vibration of the movable rib when a vehicle passes through the device, improve the vibration characteristics of the device, reduce noise, and reduce structural fatigue damage caused by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0022] Figure 2 A cross-sectional view of the overall structure provided by an embodiment of the present application (first perspective);

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0024] Figure 4 A schematic diagram of the movable rib structure provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the movable rib structure provided in an embodiment of the present application;

[0026] Figure 6 A cross-sectional view of the overall structure provided by an embodiment of the present application (second perspective);

[0027] Figure 7 A top view of the overall structure provided in an embodiment of the present application.

[0028] In the figure: 1, bearing support; 10, force measuring support; 11, support box;

[0029] 2. Movable rib; 20. Open rib; 200. Vertical rib; 201. Horizontal rib; 21. Top plate; 22. Prestressed member;

[0030] 3. Fixing ribs; 30. Housing; 31. Concrete; 32. Installation space;

[0031] 4. Sealing parts;

[0032] 5. Road panels;

[0033] 6. Preload device; 60. Elastic member; 61. Sliding pair;

[0034] 7. Main bridge;

[0035] 8. Approach bridge. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] See also Figures 1 to 7 The embodiment of the present application provides a bridge expansion joint device and a bridge assembly thereof, which can solve the problems of high vehicle passing noise and insufficient fatigue performance of existing devices in the related art.

[0038] In the first aspect, an embodiment of the present application provides a bridge expansion joint device, which includes: a bearing support 1, a fixed rib 3, a movable rib 2 and a pre-tensioning device 6, wherein the fixed rib 3 and the bearing support 1 are used to be erected on both sides of the bridge expansion joint along the longitudinal direction of the bridge; along the longitudinal direction of the bridge, one end of the movable rib 2 is used to be connected to the bearing support 1, and the other end extends toward one side of the fixed rib 3 and is movably connected to the fixed rib 3, and an installation space 32 is formed between the movable rib 2 and the fixed rib 3, and the movable rib 2 includes a vertical rib plate 200 extending to the bottom of the installation space 32; the pre-tensioning device 6 is arranged in the installation space 32, and the pre-tensioning device 6 is supported between the vertical rib plate 200 and the fixed rib 3 to apply lateral pressure to the vertical rib plate 200.

[0039] In the present application, a pre-tightening device 6 is provided between the movable rib 2 and the fixed rib 3, and lateral pressure is applied to the movable rib 2 through the pre-tightening device 6, thereby providing a vertical sliding friction resistance to the movable rib 2, which can suppress the vertical vibration of the movable rib 2 when the vehicle passes through the device, thereby improving the vibration characteristics of the device, reducing noise, and reducing structural fatigue damage caused by vibration.

[0040] The bearing support 1 and the fixed rib 3 are erected on both sides of the expansion joint of the bridge along the longitudinal direction of the bridge. The bearing support 1 is set on the main bridge 7, and the fixed rib 3 is set on the approach bridge 8 or the abutment. In order to improve the connection strength between the fixed rib 3 and the approach bridge 8 (abutment), concrete 31 is poured between the fixed rib 3 and the approach bridge 8 (abutment).

[0041] The fixed rib 3 includes an outer shell 30, which is a box-shaped structure welded from steel plates. Concrete 31 is also filled inside the outer shell 30 to increase the structural strength of the fixed rib 3. The fixed end (fixed rib 3) is formed by pouring high-performance concrete in the steel box, which reduces the manufacturing cost of the bridge expansion joint device. The load-bearing support 1 includes a load-measuring support 10 and a support box 11. There are no less than two load-measuring supports 10. All load-measuring supports 10 are set in the reserved grooves on the end face of the main bridge 7. The load-measuring supports 10 and the embedded parts on the main bridge 7 are connected by tenons to facilitate maintenance and replacement. The load-measuring supports 10 and the embedded parts on the main bridge 7 can also be fixed by bolting or welding. There is one support box 11, which is connected to the top ends of multiple load-measuring supports 10 by bolting or welding. One side of the support box 11 is connected to the movable rib 2. The support box 11 is welded from steel plates into a box-shaped structure, or the support box 11 can also be an orthotropic plate structure. After the bearing support 1 is installed on the main bridge 7, a reserved gap is provided between the support box 11 and the end face of the main bridge 7, and the reserved gap is provided to accommodate the rotation angle of the expansion joint device of the bridge.

[0042] Furthermore, a filler 4 can be set in the reserved gap. The filler 4 is made of a flexible material. Specifically, the filler 4 can be made of polyurethane. The polyurethane is filled in the reserved gap between the support box 11 and the end face of the main bridge 7. The polyurethane filler is cast at the construction site. Since polyurethane has a large bonding strength, it can connect the support box 11 and the main bridge 7.

[0043] A load cell is installed on the load bearing 10. The load cell can monitor the vertical load of the device in real time. The load cell is connected to the monitoring system via a wireless device. When the load cell detects that the vertical load exceeds the limit load, an alarm is sounded in the monitoring system. Since the load bearing 10 is fixed to the main bridge 7, the main bridge 7 will produce a transverse displacement relative to the approach bridge 8 (abutment). Therefore, the load bearing 10 can adapt to a certain displacement and limit the position when the displacement limit is reached. At the same time, the top end of the load bearing 10 rotates relative to the bottom end, and the load bearing 10 can also adapt to vertical and lateral rotation angles.

[0044] Based on the above embodiment, in this embodiment, the movable ribs 2 cover the bridge expansion joint in the transverse direction. Existing bridge expansion joint devices have gaps along the transverse direction, resulting in high noise levels when vehicles pass through. In contrast, the bridge expansion joint device of the present application covers the bridge expansion joint in the transverse direction without interruptions. This reduces impact loads and vibrations when vehicles pass through, improving safety and reducing noise.

[0045] Specifically, the movable rib 2 includes a plurality of open ribs 20 and a top plate 21. The plurality of open ribs 20 are arranged at equal intervals along the transverse direction of the bridge. The open ribs 20 are welded and fixed to the top plate 21. The open ribs 20 include horizontal rib plates 201. The horizontal rib plates 201 are fixed to the bottom ends of the vertical rib plates 200. The horizontal rib plates 201 and the vertical rib plates 200 are connected so that the open ribs 20 can form T-shaped ribs, L-shaped ribs and other structures, or the open ribs 20 are made of orthotropic plates, which reduces the manufacturing cost; the top plate 21 is arranged between the top ends of the plurality of open ribs 20, that is, a plurality of open ribs 20 are fixed to the bottom end of a top plate 21, and the top plate 21 is used to cover the expansion joints of the bridge.

[0046] A pre-tightening device 6 is provided between the movable rib 2 and the fixed rib 3. The pre-tightening device 6 provides a pre-tightening force to the movable rib 2. The pre-tightening force provides a vertical sliding friction resistance to the movable rib 2, thereby suppressing the vertical vibration of the movable rib 2 when a vehicle passes by. At the same time, since the pre-tightening device 6 is supported between the vertical rib plate 200 and the fixed rib 3, it applies lateral pressure to the vertical rib plate 200. Therefore, the pre-tightening device 6 also improves the lateral (transverse bridge direction) bending stiffness of the movable rib 2, thereby preventing the movable rib 2 from buckling.

[0047] There are many ways to form the installation space 32, for example:

[0048] In some possible embodiments, multiple fixed ribs 3 are provided along the transverse direction of the bridge, interlaced with the open ribs 20, and located at the bottom of the top plate 21. In this embodiment, a gap exists between two adjacent fixed ribs 3, which serves as the installation space 32. Each installation space 32 contains a vertical rib 200. After the device is installed, a gap is formed between the vertical rib 200 and the fixed rib 3 in each installation space 32. The preload device 6 is disposed in the gap formed between the vertical rib 200 and the fixed rib 3.

[0049] In other possible embodiments, a plurality of installation spaces 32 are provided on the fixed rib 3 along the transverse direction of the bridge, one end of the open rib 20 extends into the interior of the installation space 32, and the fixed rib 3 is located at the bottom of the top plate 21. Since the bridge expansion joint device needs to meet the requirements of the vertical rotation angle, lateral displacement, and lateral rotation angle of the beam body, there is a gap between the bottom end of the open rib 20 and the bottom end of the inner wall of the installation space 32. In this embodiment, Figure 1 As shown, the fixed rib 3 is a whole, the installation space 32 is opened on the fixed rib 3, and one end of the open rib 20 extends into the installation space 32, so that a vertical rib plate 200 is provided inside each installation space 32, and a gap is also formed between the vertical rib plate 200 of each installation space 32 and the fixed rib 3, and the pre-tightening device 6 is provided in the gap formed between the vertical rib plate 200 and the fixed rib 3.

[0050] Furthermore, the pre-tightening device 6 is made of elastic material and includes an elastic member 60. The elastic member 60 can be a rubber spring, a disc spring, a diaphragm disc spring, a leaf spring, a plate spring, etc. The elastic member 60 is arranged along the transverse bridge and is supported between the vertical rib 200 and the fixed rib 3. In order to enable the elastic member 60 to apply transverse pressure to the vertical rib 200, the height of the elastic member 60 is set to be greater than the distance between the movable rib 2 and the fixed rib 3, so that the vertical rib 200 and the fixed rib 3 clamp the elastic member 60, and the elastic member 60 is slidably connected to the vertical rib 200 and the fixed rib 3.

[0051] Since the movable rib 2 and the fixed rib 3 generate friction during relative motion, in order to prevent wear of the contact position between the movable rib 2 and the fixed rib 3, the pre-tightening device 6 further includes a sliding pair 61, such as Figure 3 As shown, the sliding pair 61 is provided between the elastic member 60 and the fixed rib 3, the top plate 21 overlaps the fixed rib 3, and the sliding pair 61 is also provided at the overlap of the movable rib 2 and the fixed rib 3, that is, the sliding pair 61 at this location is provided between the movable rib 2 and the fixed rib 3. The sliding pair 61 is made of polymer wear-resistant plate and stainless steel plate.

[0052] On the basis of the above embodiment, in this embodiment, the movable rib 2 also includes a prestressed member 22, which is connected to the top plate 21 so that the top plate 21 is located at the position of the bridge expansion joint to form a pre-arch, so that the top plate 21 fits tightly with the fixed rib 3 when the movable rib 2 is subjected to the vertical rotation angle.

[0053] There are many ways to set the prestressed member 22:

[0054] In some possible embodiments, the prestressed member 22 includes a tensioning portion, the two sides of the top of the opening rib 20 are connected to the bottom of the top plate 21, the prestressed member 22 is horizontally arranged, and the two ends of the prestressed member 22 are connected to the two ends of the opening rib 20, and the length of the tensioning portion is less than the distance between the two ends of the opening rib 20. The movable rib 2 can also be as follows Figure 5 As shown, one end of the open rib 20 is welded to the top plate 21, and the other end is welded to the support box 11. The prestressed member 22 is arranged horizontally. The horizontal arrangement means that it is arranged horizontally along the longitudinal direction of the bridge. One end of the prestressed member 22 is connected to the open rib 20, and the other end is connected to the support box 11. In this embodiment, the prestressed member 22 is a prestressed tendon, and the tensioning part ( Figure 5 The S part in the prestressed tendon shown is located between the open rib 20 and the support box 11. After the prestressed tendon is connected to the open rib 20, the connection position between the prestressed tendon and the open rib 20 is set as the connection point. The distance between the connection point and the support box 11 is greater than the length of the tensioning part (S part), so that a pre-arch is formed at the top plate 21 position at the top of the tensioning part, so that the top plates 21 on both sides of the top of the tensioning part are tightly fitted with the fixed rib 3.

[0055] In other possible embodiments, the prestressed member 22 is vertically disposed between the bottom end of the top plate 21 and the top end of the open rib 20. The height of the prestressed member 22 is greater than the distance between the bottom end of the top plate 21 and the top end of the open rib 20. The prestressed member 22 is connected to the top plate 21 at one end and to the open rib 20 at the other end. The prestressed member 22 directly supports the top plate 21, forming a pre-camber on the top plate 21 at the location of the bridge expansion joint, thereby ensuring a tight fit between the top plate 21 and the fixed rib 3.

[0056] By providing the prestressed member 22, the movable rib 2 is prestressed in advance, and the movable rib 2 is preloaded so that there is no tensile stress or a small amount of tensile stress inside the movable rib 2 under the action of the vehicle load, thereby reducing fatigue damage and enhancing the durability of the device.

[0057] In order to prevent the impact load of the vehicle running on the top plate 21 from causing the weld on the active rib 2 to crack, Figure 5 As shown, the bottom end of the opening rib 20 is bent toward the top plate 21 near the fixed rib 3 to form an arc transition curve until it contacts the top plate 21 smoothly.

[0058] The top plate 21 is overlapped on the top of the fixed rib 3 and extends along the longitudinal bridge direction to the side of the fixed rib 3 to the road surface, so that one end of the top plate 21 is overlapped with the road panel 5, which is a pre-buried steel plate in the road surface.

[0059] In order to increase the friction force when the vehicle walks on the top plate 21 and prevent the vehicle from slipping, in some possible embodiments, anti-skid grooves are provided on the top plate 21 at equal intervals along the transverse direction of the bridge. It should be noted here that when one end of the top plate 21 is in contact with the road panel 5 and the other end is overlapped on the top of the support box 11, it is only necessary to provide anti-skid grooves on the top plate 21 at intervals; when the top of the top plate 21 and the top of the support box 11 are on the same plane, it is necessary to provide anti-skid grooves on both the top plate 21 and the support box 11.

[0060] In other possible embodiments, concrete 31 is paved on the top plate 21 or on the top plate 21 and the support box 11. The concrete 31 is asphalt concrete or UHPC concrete. It should be noted that the concrete 31 used here can be the same as or different from the concrete 31 poured between the fixed rib 3 and the bridge approach 8 (abutment) and the concrete 31 filling the shell 30.

[0061] The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0062] The width of the bridge expansion joint device is set according to demand. There are multiple lanes on each bridge. According to demand, one or more bridge expansion joint devices are a bridge expansion joint device assembly. A bridge expansion joint device assembly is set at the bridge expansion joint position on each lane. The width of the bridge expansion joint device assembly on each lane is the same as the width of each lane.

[0063] In some possible embodiments, the bridge expansion joint device assembly includes one bridge expansion joint device, so the width of the bridge expansion joint device on each lane is the same as the width of each lane. For example, when the lane width is 4m, the width of the bridge expansion joint device is 4m. Specifically, since the top plate 21 covers the bridge expansion joint, the width of the top plate 21 is 4m.

[0064] In other possible embodiments, the bridge expansion joint assembly includes multiple bridge expansion joints, and the width of the multiple bridge expansion joints on each lane is the same as the width of each lane. It should be noted that the multiple bridge expansion joints in the bridge expansion joint assembly are arranged transversely to the bridge, with no overlap between adjacent bridge expansion joints. For example, if the lane width is 4m, and the bridge expansion joint assembly includes four bridge expansion joints, then each bridge expansion joint is 1m wide. Specifically, since the top plate 21 covers the bridge expansion joint, each top plate 21 is 1m wide.

[0065] The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0066] When only one expansion joint is installed on a lane on a bridge, the number of expansion joint assembly assemblies equals the number of lanes. When multiple expansion joints are installed on each lane, the number of expansion joint assembly assemblies exceeds the number of lanes. A modular layout, where each lane is equipped with a separate expansion joint assembly of the same width as the lane, facilitates installation and replacement, ensuring the integrity of the expansion joint assembly within the lane and ensuring driving comfort.

[0067] In the second aspect, an embodiment of the present application provides a bridge assembly, which includes: a bridge expansion joint device assembly and multiple lanes, the bridge expansion joint device assembly includes the bridge expansion joint device provided by any of the above embodiments of the present application, a bridge expansion joint is provided on each lane, and a bridge expansion joint device assembly is installed at the position of the bridge expansion joint on each lane, and the width of the bridge expansion joint device assembly on each lane is the same as the width of each lane.

[0068] The present application does not impose any restrictions on the specific structure of the bridge assembly. In the present application, a pre-tightening device 6 is provided between the movable rib 2 and the fixed rib 3. The pre-tightening device 6 applies lateral pressure to the movable rib 2, thereby providing a vertical sliding friction resistance to the movable rib 2. This can suppress the vertical vibration of the movable rib 2 when a vehicle passes through the device, thereby improving the vibration characteristics of the device, reducing noise, and reducing structural fatigue damage caused by vibration.

[0069] On the basis of the above embodiments, in this embodiment, the width of the bridge expansion joint device is set as required. There are multiple lanes on each bridge. According to requirements, one or more bridge expansion joint devices are a bridge expansion joint device assembly. A bridge expansion joint device assembly is set at the bridge expansion joint position on each lane. The width of the bridge expansion joint device assembly on each lane is the same as the width of each lane.

[0070] In some possible embodiments, the bridge expansion joint device assembly includes one bridge expansion joint device, so the width of the bridge expansion joint device on each lane is the same as the width of each lane. For example, when the lane width is 4m, the width of the bridge expansion joint device is 4m. Specifically, since the top plate 21 covers the bridge expansion joint, the width of the top plate 21 is 4m.

[0071] In other possible embodiments, the bridge expansion joint assembly includes multiple bridge expansion joints, and the width of the multiple bridge expansion joints on each lane is the same as the width of each lane. It should be noted that the multiple bridge expansion joints in the bridge expansion joint assembly are arranged transversely to the bridge, with no overlap between adjacent bridge expansion joints. For example, if the lane width is 4m, and the bridge expansion joint assembly includes four bridge expansion joints, then each bridge expansion joint is 1m wide. Specifically, since the top plate 21 covers the bridge expansion joint, each top plate 21 is 1m wide.

[0072] The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0073] When only one expansion joint is installed on a lane on a bridge, the number of expansion joint assembly assemblies equals the number of lanes. When multiple expansion joints are installed on each lane, the number of expansion joint assembly assemblies exceeds the number of lanes. A modular layout, where each lane is equipped with a separate expansion joint assembly of the same width as the lane, facilitates installation and replacement, ensuring the integrity of the expansion joint assembly within the lane and ensuring driving comfort.

[0074] In the description of this application, it should be noted that the terms "upper" and "lower" 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 this application 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 this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0075] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0076] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A bridge expansion joint device, characterized in that: It includes: bearing support (1); Fixed ribs (3), the fixed ribs (3) and the bearing supports (1) are used to be erected on both sides of the expansion joint of the bridge along the longitudinal direction of the bridge; A movable rib (2) is provided along the longitudinal bridge direction, one end of the movable rib (2) is used to be connected to the bearing support (1), and the other end extends toward one side of the fixed rib (3) and is movably connected to the fixed rib (3), an installation space (32) is formed between the movable rib (2) and the fixed rib (3), and the movable rib (2) includes a vertical rib plate (200) extending toward the bottom of the installation space (32); A pre-tightening device (6), the pre-tightening device (6) being arranged in the installation space (32), the pre-tightening device (6) being held between the vertical rib (200) and the fixed rib (3) to apply lateral pressure to the vertical rib (200); The movable rib (2) comprises: A plurality of opening ribs (20), wherein the opening ribs (20) include horizontal rib plates (201), and the horizontal rib plates (201) are fixed to the bottom ends of the vertical rib plates (200); A top plate (21), the top plate (21) being disposed between the top ends of a plurality of opening ribs (20), the top plate (21) being fixed to the opening ribs (20), and the top plate (21) being used to cover the expansion joint of the bridge; The fixed rib (3) comprises an outer shell (30) and concrete (31), wherein the concrete (31) is filled inside the outer shell (30); The pre-tightening device (6) comprises an elastic member (60) and a sliding pair (61), wherein the elastic member (60) is arranged along the transverse bridge, the elastic member (60) is held between the vertical rib plate (200) and the fixed rib (3), the height of the elastic member (60) is greater than the distance between the movable rib (2) and the fixed rib (3), and the sliding pair (61) is arranged between the elastic member (60) and the fixed rib (3); The movable rib (2) further comprises a prestressed member (22), wherein the prestressed member (22) is connected to the top plate (21) so that the top plate (21) forms a pre-camber at the position of the bridge expansion joint; The bottom end of the opening rib (20) is bent toward the top plate (21) on the side close to the fixed rib (3) to form an arc transition curve.

2. The bridge expansion joint device according to claim 1, characterized in that: The prestressed member (22) includes a tensioning portion, and both sides of the top end of the opening rib (20) are connected to the bottom end of the top plate (21). The prestressed member (22) is arranged horizontally, and both ends of the prestressed member (22) are connected to both ends of the opening rib (20). The length of the tensioning portion is less than the distance between the two ends of the opening rib (20); Alternatively, the prestressed member (22) is vertically arranged between the bottom end of the top plate (21) and the top end of the opening rib (20), and the height of the prestressed member (22) is greater than the distance between the bottom end of the top plate (21) and the top end of the opening rib (20).

3. The bridge expansion joint device according to claim 1, characterized in that: A plurality of installation spaces (32) are provided at intervals along the transverse bridge direction on the fixed rib (3); one end of the opening rib (20) extends into the interior of the installation space (32); and a gap is provided between the bottom end of the opening rib (20) and the bottom end of the inner wall of the installation space (32).

4. The bridge expansion joint device according to claim 1, characterized in that: A plurality of fixed ribs (3) are provided, the fixed ribs (3) and the opening ribs (20) are arranged in a staggered manner, and the fixed ribs (3) are located at the bottom of the top plate (21).

5. The bridge expansion joint device according to claim 1, characterized in that: Anti-slip grooves are provided on the top plate (21) at equal intervals along the transverse direction of the bridge; Alternatively, concrete (31) is laid on the top plate (21).

6. The bridge expansion joint device according to claim 1, characterized in that: The bearing support (1) comprises: A force measuring support (10), wherein a force measuring sensor is provided on the force measuring support (10); A support box (11), wherein the support box (11) is fixed to the top of the force measuring support (10), and one side of the support box (11) is connected to the movable rib (2).

7. A bridge assembly, characterized in that: It includes: A bridge expansion joint device assembly, the bridge expansion joint device assembly comprising the bridge expansion joint device according to any one of claims 1 to 6; There are multiple lanes, each of which is provided with a bridge expansion joint. A bridge expansion joint device assembly is installed at the bridge expansion joint position on each lane, and the width of the bridge expansion joint device assembly on each lane is the same as the width of each lane.

8. The bridge assembly according to claim 7, characterized in that: The bridge expansion joint device assembly includes a bridge expansion joint device, and the width of the bridge expansion joint device on each lane is the same as the width of each lane; The bridge expansion joint device assembly includes multiple bridge expansion joint devices, and the width of the multiple bridge expansion joint devices on each lane is the same as the width of each lane.

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