Expansion joint device suitable for lifting type movable bridge and vertical rotating type movable bridge

Abstract

According to the expansion joint device suitable for the lifting type movable bridge and the vertical rotating type movable bridge, one part of the expansion joint device is located on a fixed bridge structure, the other part of the expansion joint device is located on an opening bridge structure, and through combination of the expansion joint device and the fixed bridge structure, the expansion deformation requirement and the opening deformation requirement of the bridge under normal use are met; the expansion joint device comprises a supporting structure, angle steel, a base plate and a sliding plate, the supporting structure comprises an L-shaped steel plate, horizontal steel plates and vertical steel plates, the L-shaped steel plate is fixedly connected with the multiple vertical steel plates at equal intervals in the transverse bridge direction, and the horizontal steel plate is fixedly connected to the top of each vertical steel plate; by the adoption of the structure, the double requirements of the open-type bridge for vertical displacement and horizontal displacement are met, the construction efficiency is improved, workers can maintain and replace the expansion joint structure conveniently, and the problem of anti-corrosion maintenance of a supporting structure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion joints, and particularly to an expansion joint device applicable to lifting-opening bridges and swing-opening bridges. Background Art

[0002] A bridge expansion joint is an important part of a bridge structure, which is used to solve the displacement of the bridge caused by temperature changes, material shrinkage, earthquakes and other external forces, and is generally arranged at the end of the bridge beam body. The bridge expansion joint can ensure the free expansion and contraction of the beam body under temperature changes, and also has functions such as dust prevention and waterproofing, providing guarantee for the durable and safe use of the bridge.

[0003] The bridge expansion joint should not only allow the bridge to freely expand and contract longitudinally along the beam body, but also withstand the rolling of passing vehicles without deformation. Traditional bridge expansion joints are all applicable to non-opening bridges. The bridge can only deform freely on the plane, and does not allow the bridge to generate vertical displacement and angular deformation at the expansion joint, which cannot meet the requirements of opening bridges. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an expansion joint device applicable to lifting-opening bridges and swing-opening bridges, which can meet the vertical displacement requirements of opening bridges.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] An expansion joint device applicable to lifting-opening bridges and swing-opening bridges, a part of the expansion joint device is located on the fixed bridge structure, and the other part is located on the opening bridge structure. Through the combination of the two, the expansion and contraction deformation of the bridge under normal use and the deformation requirements of the bridge opening are realized; the expansion joint device includes a support structure, angle steel, a backing plate and a sliding plate. The support structure includes an L-shaped steel plate, a horizontal steel plate and a vertical steel plate. A number of vertical steel plates are fixedly connected at equal intervals along the transverse direction of the bridge to the L-shaped steel plate, and the horizontal steel plate is fixedly connected to the top of each vertical steel plate;

[0007] For a lifting-opening bridge, the expansion joint device on the fixed bridge structure is composed of a support structure. The L-shaped steel plate is nested and connected with the horizontal steel bars and vertical steel bars pre-embedded on the fixed bridge structure respectively through the horizontal anchoring steel bars on the back and the vertical anchoring steel bars at the bottom, and is fastened by transverse steel bars. Steel fiber concrete is poured into the L-shaped cavity formed between the L-shaped steel plate and the fixed bridge structure to achieve fixation;

[0008] For a lifting-opening bridge, the expansion joint device on the opening bridge structure is composed of angle steel, backing plates and sliding plates. The sliding plates, backing plates and angle steel are arranged from top to bottom in sequence, and the total thickness is the same as the paving thickness of the opening bridge structure. They are fixed to the opening bridge structure by countersunk bolts. One end of the sliding plate overlaps on the upper surface of the horizontal steel plate and has a gap with the L-shaped steel plate, and the other end is fixed to the opening bridge structure by countersunk bolts.

[0009] For a vertical-rotation opening bridge, the expansion joint device on the opening bridge structure is composed of a support structure. The L-shaped steel plate is respectively nested and connected with the horizontal steel bars and vertical steel bars embedded in the opening bridge structure through the horizontal anchoring steel bars on the back and the vertical anchoring steel bars at the bottom, and is fastened by cross-bridge steel bars. The L-shaped cavity formed between the L-shaped steel plate and the opening bridge structure is filled with steel fiber concrete for fixation.

[0010] For a vertical-rotation opening bridge, the expansion joint device on the fixed bridge structure is composed of angle steel, backing plates and sliding plates. The sliding plates, backing plates and angle steel are arranged from top to bottom in sequence, and the total thickness is the same as the paving thickness of the fixed bridge structure. They are fixed to the fixed bridge structure by countersunk bolts. One end of the sliding plate overlaps on the upper surface of the horizontal steel plate and has a gap with the L-shaped steel plate, and the other end is fixed to the fixed bridge structure by countersunk bolts.

[0011] Further, several independent cavities are formed between the vertical steel plates of the L-shaped steel plate to prevent sundries from affecting the normal expansion and contraction of the bridge.

[0012] Further, the bottom of the L-shaped steel plate is set as an inclined surface for drainage, and a cross-bridge water collecting trough is arranged at the end of the inclined surface at the bottom of the L-shaped steel plate, so that rainwater is discharged through the water collecting trough.

[0013] Further, stiffening steel plates are arranged on the lower surface of the sliding plates, and the stiffening steel plates are arranged at the gaps between the horizontal steel plates at intervals to improve the strength and stiffness of the sliding plates.

[0014] Further, stiffening ribs can be added to the vertical steel plates, and twice the length of the stiffening ribs is less than the gap between the vertical steel plates.

[0015] Further, pavements are provided on both the fixed bridge structure and the opening bridge structure, and the tops of the L-shaped steel plate, the sliding plates and the steel fiber concrete are flush with the upper surface of the pavement.

[0016] Further, according to the actual situation of the bridge, the size and structure of the expansion device are obtained through modular prefabrication, which is convenient for maintenance and replacement.

[0017] Compared with the prior art, the beneficial effects brought by the technical solution of the present invention are:

[0018] 1. In the present invention, the movable end of the skateboard structure is lapped on the upper surface of the horizontal steel plate; the fixed end is fastened to the opening bridge structure and the fixed bridge structure through countersunk bolts successively passing through the angle steel, the backing plate and the panel; a gap is reserved between the top of the movable end of the skateboard and the L-shaped steel plate to meet the horizontal displacement requirement.

[0019] The above settings ensure that in the bridge opening state, the skateboard rises integrally with the bridge deck without interfering with the support structure, ensuring that the expansion joint structure is not damaged; in the bridge closing state, the skateboard can slide freely in the longitudinal direction of the bridge to meet the horizontal displacement requirements caused by temperature changes, earthquakes, etc.; the two-way displacement matching (vertical + longitudinal) improves the safety and reliability of the bridge.

[0020] 2. In the present invention, reinforcing steel plates are arranged on the lower surface of the skateboard, or stiffening ribs are welded on the vertical steel plates of the support structure, and twice the length of the stiffening ribs is less than the gap between adjacent vertical steel plates; a distance B is reserved between the skateboard and the support structure, which can be set according to temperature or other displacement requirements.

[0021] The above settings increase the bending and shear strength of the skateboard, making the expansion joint applicable to larger expansion widths and higher loads; ensuring that no plastic deformation occurs under long-term load cycles, with wide applicability and extending the service life of the structure.

[0022] 3. In the present invention, the support structure is prefabricated in the factory from L-shaped steel plates, horizontal steel plates and vertical steel plates; on-site, the anchor reinforcement bars are nested with the pre-buried horizontal reinforcement bars and vertical reinforcement bars, and after being fastened by transverse bridge reinforcement bars, steel fiber concrete is poured into the L-shaped cavity;

[0023] The above settings make the quality of the prefabricated components controllable, and on-site installation only requires positioning, welding and pouring, with high construction efficiency; the steel fiber concrete and the steel plates and reinforcement bars are combined to bear the load, with a high overall connection redundancy and a large error tolerance, meeting the requirements of large displacements and high load cycles.

[0024] 4. In the present invention, the horizontal steel plate and the vertical steel plate are welded into a T-shaped cross-section, and a gap is left between each group of plates; the transverse plate of the L-shaped steel plate is provided with an outward inclination slope.

[0025] The above settings provide a larger contact area and a better force distribution, reducing local stress concentration; the gap between the plates and the inclined edge can make sundries, sand and gravel, water flow, etc. slide down or drain downward without hindering the sliding of the skateboard and reducing the risk of jamming.

[0026] 5. In the present invention, a catch basin top plate and a catch basin are welded outside the support structure, and the rainwater on the bridge deck collected along the L-shaped steel plate is introduced into the longitudinal water collection system of the bridge through the transverse bridge direction; the support structure and the catch basin are preferably made of stainless steel materials.

[0027] The above settings effectively drain rainwater from the bridge deck, preventing rainwater and sewage from dripping directly under the bridge, and reducing environmental pollution; stainless steel is corrosion-resistant, extending the service life of expansion joints and drainage devices, and reducing maintenance frequency and costs.

[0028] 6. In the present invention, a pad is placed between the angle steel and the slide plate, and the thickness of the pad can be adjusted according to the bridge deck pavement and component thickness; the slide plate, pad and embedded plate are arranged in sections.

[0029] The above settings can be fine-tuned through the pad to ensure that the top surface of the skateboard is flush with the pavement surface without any high or low steps, thereby improving the smoothness of the bridge deck; the modular segmented design facilitates the later disassembly, inspection or replacement of individual components, reduces the workload, and improves maintenance efficiency. Compared with traditional modular and comb-tooth plate expansion joints, the present invention can complete the maintenance and replacement of expansion joints in sections without disconnection.

[0030] 7. The slide plate, the primary load-bearing component, can be quickly removed using countersunk bolts. The support structure, sump, and slide plate are all segmented, and key steel plates utilize standard thickness for easy replacement. Routine inspections eliminate the need to dismantle large components; only the slide plate is required. The convenient assembly and disassembly method and universal material versatility reduce the professional barriers to entry and operational risks for maintenance personnel.

[0031] 8. The slide plate is made of a whole piece of steel plate. The allowable displacement of the bridge in the transverse direction during the opening and closing process of the bridge is larger than that of the comb plate expansion joint.

[0032] 9. When the present invention is applied to a lifting bascule bridge, the expansion joint support structure is located on the fixed bridge structure, and the expansion joint device on the bascule bridge structure consists of angle steel, a backing plate, and a slide plate. When the present invention is applied to a vertical rotating bascule bridge, the expansion joint support structure is located on the bascule bridge structure, and the expansion joint device on the fixed bridge structure consists of angle steel, a backing plate, and a slide plate.

[0033] Through the organic combination of the above-mentioned technical features, the present invention not only meets the vertical and longitudinal displacement requirements of the opening bridge in both the open and closed states, but also takes into account the bearing performance, drainage and debris prevention, corrosion resistance and durability, and construction and maintenance efficiency, greatly improving the comprehensive reliability and ease of use of the bridge expansion joint device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1a Schematic diagram of the structure of the expansion joint device in Example 1; Figure 1b This is a structural diagram of the lifting span in the lifting state in Example 1.

[0035] Figure 2 This is a schematic structural diagram of the vertical rotating span in the vertical rotating state in Example 2;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of the support structure of the expansion joint device;

[0037] Figure 4 Elevation structure schematic diagram of the support structure of the expansion joint device

[0038] Reference numerals: 1 - L-shaped steel plate; 2 - horizontal steel plate; 3 - vertical steel plate; 4 - angle steel; 5 - backing plate; 6 - sliding plate; 7 - countersunk head bolt; 8 - paving surface; 9 - paving surface; 10 - horizontal steel bar; 11 - vertical steel bar; 12A - fixed span; 12B - swing span; 13A - lifting span; 13B - fixed span; 14 - top plate of catch basin; 15 - catch basin; 16 - steel fiber concrete; 17 - horizontal anchoring steel bar; 18 - vertical anchoring steel bar; 19 - transverse bridge direction steel bar; 20 - reinforcing steel plate Specific embodiments

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0040] Embodiment 1

[0041] As shown in Figure 1a , Figure 1b , Figure 3 and Figure 4 , this embodiment provides an expansion joint device applicable to a lifting type opening bridge. Based on the relatively arranged fixed bridge structure and opening bridge structure, the fixed bridge structure is the fixed span 12A in Figure 1a and Figure 1b , and the opening bridge structure is the lifting span 13A in Figure 1a and Figure 1b . An expansion joint is provided between the fixed span 12A and the lifting span 13A. A number of horizontal steel bars 10 and vertical steel bars 11 are embedded at equal intervals along the transverse bridge direction in the fixed span 12A; a paving surface 8 is provided on the upper surface of the fixed span 12A, and a paving surface 9 is provided on the upper surface of the lifting span 13A

[0042] The expansion joint device includes angle steel 4, backing plate 5, sliding plate 6 and a support structure. The support structure includes an L-shaped steel plate 1, a horizontal steel plate 2 and a vertical steel plate 3. A number of horizontal anchoring steel bars 17 are fixedly connected to the back of the vertical plate of the L-shaped steel plate 1. The transverse plate of the L-shaped steel plate inclines downward and a number of vertical anchoring steel bars 18 are fixedly connected to its bottom. The L-shaped steel plate 1 is connected to the fixed span 12A through steel bar nesting. The horizontal anchoring steel bars 17 and the horizontal steel bars 10 are nested with each other and fastened by transverse bridge direction steel bars 19. The vertical anchoring steel bars 18 and the vertical steel bars 11 are nested with each other and fastened by transverse bridge direction steel bars 19. Steel fiber concrete 16 is poured into the L-shaped cavity formed between the support structure and the fixed span 12A

[0043] The L-shaped steel plates are arranged vertically at equal intervals along the transverse direction of the bridge. A horizontal steel plate 2 is welded to the top of the vertical steel plate 3. There is a difference in thickness of the sliding plate 6 between the horizontal steel plate 2 and the paving surface 8. The vertical steel plate 3 is arranged at the longitudinal center line of the horizontal steel plate 2 and is welded and fixed at the connection position with the L-shaped steel plate 1. A number of independent cavities are formed between the L-shaped steel plate 1 and the vertical steel plate (3) to prevent sundries from affecting the normal expansion and contraction of the bridge.

[0044] The movable end of the sliding plate 6 overlaps on the upper surface of the horizontal steel plate 2, and there is a gap between the top end of the movable end of the sliding plate 6 and the L-shaped steel plate 1; Angle steel 4 and a backing plate 5 are also provided on the lifting span 13A. The angle steel 4 is connected to the top surface and the side surface of the lifting span 13A. A backing plate 5 is provided on the upper surface of the angle steel 4. The fixed end of the sliding plate 6 is fastened by countersunk bolts passing through the angle steel 4, the backing plate 5 and the lifting span 13A in sequence.

[0045] Preferably, the spacing and thickness of the horizontal steel plate 2 are determined according to the magnitude of the force, and the thickness of the vertical steel plate 3 is determined according to the magnitude of the force. Stiffening ribs are added if necessary.

[0046] Preferably, the sliding plate 6 and the lifting span 13A are connected by countersunk bolts 7. The thickness of the sliding plate 6 is determined according to the magnitude of the force. If necessary, a reinforcing steel plate 20 is added at the gap of the horizontal steel plate of the support structure. The distance B between the sliding plate 6 and the support structure is determined according to the displacement caused by temperature, earthquake, etc. Angle steel 4 is embedded in the upper part of the lifting span 13A to ensure that the end of the opening bridge is not damaged due to local stress.

[0047] Preferably, a backing plate 5 is placed between the sliding plate 6 and the angle steel 4. The thickness of the backing plate 5 is determined according to the thickness of the paving surface 9 of the opening bridge deck, the thickness of the angle steel 4 and the thickness of the sliding plate 6. It can also be used to adjust the construction error. The upper surface of the sliding plate 6 is flush with the upper surface of the paving surface 9.

[0048] Preferably, there are gaps between the horizontal steel plates 2 in the support structure. The bridge deck water flow and sundries can flow downward through the gaps. The bottom surface of the L-shaped steel plate 1 is provided with a slope inclined downward to the outside to avoid water staying inside the support structure. A cross-bridge catch basin 15 is arranged at the end of the bottom slope of the L-shaped steel plate 1 to collect the flowing water inside the L-shaped steel plate 1. The catch basin 15 introduces the flowing water into the longitudinal drainage groove of the bridge along the transverse direction.

[0049] Preferably, the support structure and the catch basin 15 can be made of stainless steel material to avoid the influence of rain and sewage on the corrosion of the structure and affect the normal use, and extend the service life of the expansion joint structure.

[0050] Specifically, the usage method of the above expansion joint device is as follows:

[0051] During actual use, first, the L-shaped steel plate 1, horizontal steel plate 2, and vertical steel plate 3 of the support structure are welded in the factory. When storing and transporting this part, place it on its side on the ground or transport vehicle; during the construction of the fixed span 12A, horizontal reinforcing bars 10 and vertical reinforcing bars 11 are embedded; after the support structure is transported to the construction site, horizontal anchoring bars 17 and vertical anchoring bars 18 are welded on the side far from the expansion joint. Determine the position of the support structure according to the relative relationship between the support structure and the paving surface 8. The horizontal reinforcing bar 10 is nested with the horizontal anchoring bar 17, and transverse bridge reinforcing bars 19 are placed at the intersection points within the area surrounded by the reinforcing bars. The vertical reinforcing bar 11 is nested with the vertical anchoring bar 18, and transverse bridge reinforcing bars 19 are placed at the intersection points within the area surrounded by the reinforcing bars; then, steel fiber concrete 16 is poured into the L-shaped cavity formed between the support structure and the fixed span 12A to complete the construction of the expansion joint support structure; after the curing work of the steel fiber concrete 16 is completed, the water collecting trough 15 and the water collecting trough top plate 14 are welded to the outermost lower part of the L-shaped steel plate 1; the angle steel 4 is welded to the lifting span 13A; the sliding plate 6 and the backing plate 5 are anchored to the openable bridge deck through countersunk bolts 7 to complete the installation construction of the openable bridge expansion joint device. During daily use, the sliding plate 6, as the main load-bearing member, is bolted to the lifting span 13A, which is convenient for the staff to maintain and replace.

[0052] See Figure 1b , after the installation of the expansion joint on the lifting type opening bridge is completed, when the bridge is opened, the sliding plate 6 rises with the bridge, and it will not have any impact on the expansion joint structure. After the bridge is closed, the expansion joint can meet the free expansion of the bridge in the horizontal direction, avoiding the threat to the bridge safety caused by the deformation of the bridge.

[0053] Embodiment 2

[0054] As Figure 2 、 Figure 3 and Figure 4 shown, this embodiment provides an expansion joint device applicable to a vertical rotation type opening bridge. Based on the relatively arranged fixed bridge structure and opening bridge structure, the fixed bridge structure is the fixed span 13B in Figure 2 , and the opening bridge structure is the vertical rotation span 12B in Figure 2 . An expansion joint is provided between the fixed span 13B and the vertical rotation span 12B. A number of horizontal reinforcing bars 10 and vertical reinforcing bars 11 are embedded at equal intervals along the transverse bridge direction in the vertical rotation span 12B; the upper surface of the fixed span 13B is provided with a paving surface 9, and the upper surface of the vertical rotation span 12B is provided with a paving surface 8;

[0055] The expansion joint device includes an angle steel 4, a pad 5, a slide plate 6 and a support structure. The support structure includes an L-shaped steel plate 1, a horizontal steel plate 2 and a vertical steel plate 3. The back of the vertical plate of the L-shaped steel plate 1 is fixed with a plurality of horizontal anchor steel bars 17. The transverse plate of the L-shaped steel plate is inclined downward and a plurality of vertical anchor steel bars 18 are fixed at its bottom. The L-shaped steel plate 1 is connected to the vertical rotation span 12B through a nested steel bar. The horizontal anchor steel bar 17 and the horizontal steel bar 10 are nested and connected to each other and fastened by a transverse bridge steel bar 19. The vertical anchor steel bar 18 and the vertical steel bar 11 are nested and connected to each other and fastened by a transverse bridge steel bar 19. The L-shaped cavity formed between the support structure and the vertical rotation span 12B is cast with steel fiber concrete 16.

[0056] The L-shaped steel plate is arranged with vertical steel plates 3 at equal intervals along the transverse direction of the bridge. Horizontal steel plates 2 are welded to the top of the vertical steel plates 3. The difference between the horizontal steel plates 2 and the pavement surface 8 is the thickness of the slide plate 6. The vertical steel plates 3 are arranged at the center line of the horizontal steel plates 2 in the longitudinal direction of the bridge. The vertical steel plates 3 are welded and fixed at the connection position with the L-shaped steel plate 1. Several independent cavities are formed between the L-shaped steel plate 1 and the vertical steel plates (3) to prevent debris from affecting the normal expansion and contraction of the bridge.

[0057] The movable end of the slide plate 6 is overlapped on the upper surface of the horizontal steel plate 2, and there is a gap between the top of the movable end of the slide plate 6 and the L-shaped steel plate 1; the fixed span 13B is also provided with an angle steel 4 and a pad 5, the angle steel 4 is connected to the top and side surfaces of the fixed span 13B, and the pad 5 is provided on the upper surface of the angle steel 4. The fixed end of the slide plate 6 is fastened by a countersunk bolt that passes through the angle steel 4, the pad 5 and the fixed span 13B in sequence;

[0058] Preferably, the spacing and thickness of the horizontal steel plates 2 are determined according to the magnitude of the force, and the thickness of the vertical steel plates 3 is determined according to the magnitude of the force, and stiffening ribs are added if necessary.

[0059] Preferably, the slide plate 6 is connected to the fixed span 13B via countersunk bolts 7. The thickness of the slide plate 6 is determined based on the applied force. If necessary, reinforcing steel plates 20 are added to the gaps between the horizontal steel plates of the supporting structure. The distance B between the slide plate 6 and the supporting structure is determined based on displacement caused by temperature, earthquakes, and other factors. Angle steel 4 is embedded in the upper portion of the fixed span 13B to protect the ends of the bascule bridge from damage due to localized forces.

[0060] Preferably, a pad 5 is placed between the skateboard 6 and the angle steel 4. The thickness of the pad 5 is determined according to the thickness of the pavement surface 9 of the open bridge, the thickness of the angle steel 4 and the thickness of the skateboard 6. It can also be used to adjust construction errors, and the top surface of the skateboard 6 is flush with the top surface of the pavement surface 9.

[0061] Preferably, there are gaps between each horizontal steel plate 2 in the support structure, and the flowing water and sundries on the bridge deck can flow downward through the gaps. The bottom surface of the L-shaped steel plate 1 is provided with a slope that inclines downward to the outside, preventing water from staying inside the support structure. At the end of the bottom slope of the L-shaped steel plate 1, a cross-bridge water collecting trough 15 is provided for collecting the flowing water in the L-shaped steel plate 1. The water collecting trough 15 introduces the flowing water into the longitudinal drainage trough of the bridge along the cross-bridge direction.

[0062] Preferably, the support structure and the water collecting trough 15 can be made of stainless steel material, preventing rain and sewage from corroding the structure and affecting normal use, and extending the service life of the expansion joint structure.

[0063] As Figure 2 shown, this expansion joint is installed on the vertical rotation type opening bridge. When the vertical rotation span 12B is opened, the support structure of the expansion joint rotates downward along with the bridge around the rotation axis of the vertical rotation span, without posing any threat to the expansion joint structure.

[0064] The above settings can make the sliding plate located on the opening bridge structure of the lifting type opening bridge. When the opening bridge is lifted, the upper sliding plate of the expansion joint is lifted upward together with the opening bridge structure, ensuring that the expansion joint meets the displacement requirements for the upward lift of the lifting type opening bridge; the above settings can make the support structure of the expansion joint located on the opening bridge structure of the vertical rotation type opening bridge. When the opening bridge rotates, the lower support structure of the expansion joint rotates downward together with the opening bridge structure, ensuring that the expansion joint meets the displacement requirements for the downward rotation of the vertical rotation type opening bridge.

[0065] In summary, the above settings can make the sliding plate located on the opening bridge structure of the lifting type opening bridge. When the opening bridge is lifted, the upper sliding plate of the expansion joint is lifted upward together with the opening bridge structure, ensuring that the expansion joint meets the displacement requirements for the upward lift of the lifting type opening bridge; the above settings can make the support structure of the expansion joint located on the opening bridge structure of the vertical rotation type opening bridge. When the opening bridge rotates, the lower support structure of the expansion joint rotates downward together with the opening bridge structure, ensuring that the expansion joint meets the displacement requirements for the downward rotation of the vertical rotation type opening bridge.

[0066] The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any simple modification, change, and equivalent structural change made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

[0067] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the purpose of the present invention and the scope protected by the claims, those of ordinary skill in the art can make many specific transformations in various forms under the inspiration of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A telescopic joint device applicable to lifting-opening bridges and vertical-turning-opening bridges, characterized in that, Part of the expansion joint device is located on the fixed bridge structure, and the other part is located on the opening bridge structure. Through the combination of the two, the expansion and deformation under normal use of the bridge and the deformation requirements for bridge opening are realized. The expansion joint device includes a support structure, angle steel (4), a backing plate (5), and a sliding plate (6). The support structure includes an L-shaped steel plate (1), a horizontal steel plate (2), and a vertical steel plate (3). A number of vertical steel plates (3) are fixedly connected at equal intervals along the transverse direction of the bridge to the L-shaped steel plate (1), and the horizontal steel plate (2) is fixedly connected to the top of each vertical steel plate (3). For a lifting type opening bridge, the expansion joint device on the fixed bridge structure consists of a support structure. The L-shaped steel plate (1) is nested and connected with the horizontally embedded steel bars (10) and vertically embedded steel bars (11) pre-embedded in the fixed bridge structure respectively through the horizontal anchoring steel bars (17) on the back and the vertical anchoring steel bars (18) at the bottom, and is fastened by the transverse bridge steel bars (19). The L-shaped cavity formed between the L-shaped steel plate (1) and the fixed bridge structure is filled with steel fiber concrete (16) to achieve fixation. For a lifting type opening bridge, the expansion joint device on the opening bridge structure consists of angle steel (4), a backing plate (5), and a sliding plate (6). The sliding plate (6), the backing plate (5), and the angle steel (4) are arranged from top to bottom in sequence, and the total thickness is the same as the paving thickness of the opening bridge structure, and is fixed to the opening bridge structure through countersunk head bolts (7). One end of the sliding plate (6) overlaps on the upper surface of the horizontal steel plate (2) and has a gap with the L-shaped steel plate (1), and the other end is fixed to the opening bridge structure through countersunk head bolts (7). For a vertical rotation type opening bridge, the expansion joint device on the opening bridge structure consists of a support structure. The L-shaped steel plate (1) is nested and connected with the horizontally embedded steel bars (10) and vertically embedded steel bars (11) pre-embedded in the opening bridge structure respectively through the horizontal anchoring steel bars (17) on the back and the vertical anchoring steel bars (18) at the bottom, and is fastened by the transverse bridge steel bars (19). The L-shaped cavity formed between the L-shaped steel plate (1) and the opening bridge structure is filled with steel fiber concrete (16) to achieve fixation. For a vertical rotation type opening bridge, the expansion joint device on the fixed bridge structure consists of angle steel (4), a backing plate (5), and a sliding plate (6). The sliding plate (6), the backing plate (5), and the angle steel (4) are arranged from top to bottom in sequence, and the total thickness is the same as the paving thickness of the fixed bridge structure, and is fixed to the fixed bridge structure through countersunk head bolts (7). One end of the sliding plate (6) overlaps on the upper surface of the horizontal steel plate (2) and has a gap with the L-shaped steel plate (1), and the other end is fixed to the fixed bridge structure through countersunk head bolts (7).

2. The expansion joint device applicable to lifting-opening bridges and swing-opening bridges according to claim 1, characterized in that, A number of independent cavities are formed between the L-shaped steel plate (1) and the vertical steel plate (3) to prevent sundries from affecting the normal expansion and contraction of the bridge.

3. The expansion joint device applicable to lifting-opening bridges and swing-opening bridges according to claim 1 or 2, characterized in that, The bottom of the L-shaped steel plate (1) is set as an inclined surface for drainage, and a transverse water collecting trough (15) is arranged at the end of the inclined surface at the bottom of the L-shaped steel plate (1) to discharge rainwater through the water collecting trough (15).

4. The expansion joint device applicable to lifting-opening bridges and swing-opening bridges according to claim 1, characterized in that, A stiffening steel plate (20) is provided on the lower surface of the skateboard (6), and the stiffening steel plate (20) is arranged at the gaps where the horizontal steel plates (2) are spaced apart from each other to improve the strength and stiffness of the skateboard (6).

5. The expansion joint device applicable to lifting opening bridges and vertical swing opening bridges according to claim 1 or 2 or 3, characterized in that, The vertical steel plate (3) is added with a stiffening rib structure, and twice the length of the stiffening rib is less than the gap between the vertical steel plates.

6. The expansion joint device applicable to lifting opening bridges and swing opening bridges according to claim 1, characterized in that, According to the actual situation of the bridge, the size and structure of the expansion device are obtained through modular prefabrication, which is convenient for maintenance and replacement.

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