Solid web type steel approach bridge

Abstract

The utility model provides a solid web section steel approach bridge which comprises a bridge deck system, two main arched girders and four supports, the two main arched girders are arranged on the two sides of the bridge deck system respectively and fixedly connected with the bridge deck system, and the four supports are arranged on the lower portions of the two ends of the two main arched girders respectively and fixedly connected with the bridge deck system. And the middle part of the main arched beam is upwards arched. The main arched girders are arranged in an upward arched manner, so that the occupation of the main arched girders on the volume of the lower part of the bridge deck system is reduced, the lower part of the bridge deck system is emptied, and the distance between the bridge deck system and the water surface is increased, thereby preventing floating objects on the water surface from damaging the solid-web section steel approach bridge and influencing the safe operation of the solid-web section steel approach bridge. On the other hand, the main arched girders are arranged on the two sides of the bridge deck system and protrude out of the bridge deck system, so that protection is formed on the two sides of the bridge deck system, and pedestrians are prevented from falling off when passing through the bridge deck system.

Description

Technical Field

[0001] This utility model relates to the field of port engineering technology, specifically to a solid-web steel approach bridge. Background Technology

[0002] Steel approach bridges are common hydraulic structures in port and wharf engineering. Their structural types typically include parallel chord truss steel approach bridges, variable-height truss steel approach bridges, open-web arch truss steel approach bridges, and solid-web girder steel approach bridges. In engineering practice, solid-web girder steel approach bridges usually adopt an upper-bearing design, meaning the bridge deck is set on top of the main load-bearing beam structure of the bridge span. The advantages of upper-bearing steel approach bridges are simple bridge deck construction and convenient construction; the disadvantage is a relatively large structural height from the bridge deck to the bottom of the beam. During high water levels or floods, the bottom of the main beam of an upper-bearing solid-web girder steel approach bridge is easily eroded and impacted by floating debris, affecting the operational stability of the steel approach bridge and posing certain safety hazards. In addition, during the construction of the bridge piers, for the fixed section of the steel approach bridge, the piers at both ends of the steel approach bridge are far apart, which can easily lead to height errors during construction. Secondly, the length of the steel approach bridge will change to a certain extent when it is thermally expanded and contracted. The existing steel approach bridge is connected to the piers at both ends. The height error of the piers and the deformation caused by the thermal expansion and contraction of the steel approach bridge itself can easily lead to damage to the steel approach bridge or the piers.

[0003] In summary, there is an urgent need for a solid-web steel approach bridge to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of this utility model is to provide a solid-web steel approach bridge, which aims to solve the problems of existing deck-type bridges, such as the large area occupied under the bridge deck and the instability caused by floating debris hitting the bottom of the main beam during high water levels or floods. The specific technical solution is as follows:

[0005] A solid-web steel approach bridge includes a bridge deck system, main arch beams, and supports. Two main arch beams are arranged on both sides of the bridge deck system and are fixedly connected to the bridge deck system. Four supports are arranged at the lower parts of both ends of the two main arch beams. The middle part of the main arch beams is arched upwards.

[0006] Furthermore, the support includes a first support body, a second support body, and a pin. The first support body is fixedly connected to the lower part of the main arch beam. The second support body is rotatably connected to the lower end of the first support body via the pin. The axis of the pin is arranged along the width direction of the solid-web steel approach bridge. The second support body includes an upper support, a sliding block, and a bearing block. The upper support is rotatably connected to the lower part of the first support body via the pin. The bottom of the upper support is provided with a slot. The sliding block is inserted into the slot. The slot is arranged along the width direction of the solid-web steel approach bridge. The bottom of the sliding block is provided with a groove. The bearing block is slidably supported in the groove.

[0007] Furthermore, the support includes a base, a pad, and a limiting seat. The pad is fixedly connected to the base, the limiting seat is located above the base, and the limiting seat is fixedly connected to one end of the main arch beam. The bottom of the limiting seat is provided with a downward-opening sliding groove, and the limiting seat is slidably supported on the pad through the sliding groove.

[0008] Furthermore, the pad includes an upper arc pad and a lower arc pad. The upper arc pad is slidably connected in the sliding groove. The lower part of the upper arc pad protrudes downward in an arc shape. The lower arc pad is fixedly connected to the base. The upper part of the lower arc pad is concave downward in an arc shape. The upper arc pad and the lower arc pad can be rotatably fitted together along the center of the arc shape.

[0009] Furthermore, the main arch beam includes an upper flange, a lower flange, a web, and a stiffening plate. The lower flange is arranged horizontally, and the middle of the upper flange arches upward in an arch shape. The two ends of the upper flange are fixedly connected to the two ends of the lower flange. The web is fixedly connected between the upper flange and the lower flange. The stiffening plate is arranged vertically, and the first end of the stiffening plate is fixedly connected to the upper flange. The second end of the stiffening plate extends downward and is fixedly connected to the lower flange.

[0010] Furthermore, the bridge deck system includes a bridge deck panel, crossbeams, and longitudinal beams. Multiple crossbeams and longitudinal beams are arranged, and the multiple crossbeams and multiple longitudinal beams are arranged alternately on the lower part of the bridge deck panel. Two main arch beams are fixedly connected to both sides of the bridge deck panel, and the first end of all crossbeams is fixedly connected to one of the main arch beams, and the second end of all crossbeams is fixedly connected to the other main arch beam.

[0011] Furthermore, the bridge deck system also includes tie rods and node plates. Multiple node plates are arranged and fixed to multiple crossbeams respectively. The first end of the tie rod is fixedly connected to one of the node plates, and the second end of the tie rod is fixedly connected to the adjacent node plate. The tie rods are arranged to cross the crossbeams and the longitudinal beams.

[0012] Furthermore, it also includes guardrails, with two guardrails arranged and fixed to the top of the two main arch beams respectively.

[0013] Furthermore, the top of the guardrail is horizontally arranged, and the bottom of the guardrail is fixedly connected to the upper flange of the main arch beam, matching the arch shape of the upper flange.

[0014] Furthermore, it also includes connecting chains, with four connecting chains arranged at both ends of the two main arch beams.

[0015] Furthermore, the crossbeams and longitudinal beams are fixed together by welding.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] By adopting an upward arching arrangement of the main arch beam, the volume occupied by the main arch beam on the lower part of the bridge deck system is reduced, leaving space under the bridge deck system and increasing the distance between the bridge deck system and the water surface. This prevents floating objects on the water surface from damaging the solid steel approach bridge and affecting its safe operation.

[0018] Secondly, the main arch beams are arranged on both sides of the bridge deck system, protruding from the bridge deck system, thus forming protection on both sides of the bridge deck system and preventing pedestrians from falling when crossing the bridge deck system; by arranging the main arch beams on both sides of the bridge deck system, the rigidity and stability of the entire solid-web steel approach bridge are improved, making the solid-web steel approach bridge more stable and safer during operation.

[0019] Furthermore, through the setting of the support, when the steel approach bridge undergoes thermal expansion and contraction, the limiting seat moves relative to the pad in the support, preventing the steel approach bridge from deforming during thermal expansion and contraction, preventing damage to the steel approach bridge, and improving the service life of the steel approach bridge.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-8 The present invention will be described in further detail below. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a solid-web steel approach bridge according to this utility model;

[0023] Figure 2 This is a partially enlarged schematic diagram of a solid-web steel approach bridge according to this utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the support in a solid-web steel approach bridge according to this utility model;

[0025] Figure 4 This is a cross-sectional view of a support in a solid-web steel approach bridge according to this utility model;

[0026] Figure 5 This is a partially enlarged schematic diagram of another embodiment of a solid-web steel approach bridge according to this utility model;

[0027] Figure 6 This is a cross-sectional view of another embodiment of a solid-web steel approach bridge according to this utility model;

[0028] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 This is a schematic diagram of the overall structure of the support in another embodiment of a solid-web steel approach bridge according to this utility model.

[0030] The components include: 1. Bridge deck system; 11. Bridge deck panel; 12. Crossbeam; 13. Longitudinal beam; 14. Diagonal tie rod; 15. Node plate; 2. Main arch beam; 21. Upper flange; 22. Lower flange; 23. Web plate; 24. Stiffening plate; 3. Support; 31. Base; 32. Pad; 321. Upper arc pad; 322. Lower arc pad; 33. Limiting seat; 331. Sliding groove; 34. First seat body; 35. Second seat body; 351. Upper seat; 352. Sliding seat; 353. Bearing block; 36. Pin shaft; 4. Guardrail; 5. Connecting chain. Detailed Implementation

[0031] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0033] Example:

[0034] See Figures 1-8 This embodiment provides a solid-web steel approach bridge, including a bridge deck system 1, main arch beams 2 and supports 3. Two main arch beams 2 are arranged on both sides of the bridge deck system 1, and both main arch beams 2 are fixedly connected to the bridge deck system 1. Four supports 3 are arranged on the lower part of both ends of the two main arch beams 2, and the middle part of the main arch beams 2 is arched upward.

[0035] It should be noted that solid-web steel approach bridges are often used in wharf projects. Some of these steel approach bridges do not need to move with the rise or fall of the water level in the river or lake; these are called fixed steel approach bridges. Other steel approach bridges need to move with the rise or fall of the water level in the river or lake; these are called movable steel approach bridges. Fixed steel approach bridges are mostly used between the wharf and the bridge pier, while movable steel approach bridges are generally erected between the wharf and the pontoon that moves with the rise or fall of the water level.

[0036] When the river rises, it often carries floating objects. If a conventional upper-bearing steel approach bridge is used, the lower part of the bridge needs to occupy a lot of space, making it easy to collide with floating objects on the water surface. When the floating objects are large and move quickly, they can easily damage the steel approach bridge.

[0037] Understandably, by arranging the main arch beam 2 in an upward arched manner, the volume occupied by the main arch beam 2 on the lower part of the bridge deck system 1 is reduced, leaving space under the bridge deck system 1 and increasing the distance between the bridge deck system 1 and the water surface. This prevents floating objects on the water surface from damaging the solid-web steel approach bridge and affecting its safe operation. Secondly, the main arch beam 2 is arranged on both sides of the bridge deck system 1, protruding from the bridge deck system 1, thus providing protection on both sides of the bridge deck system 1 and preventing pedestrians from falling when crossing the bridge deck system 1. Furthermore, the arrangement of the main arch beam 2 on both sides of the bridge deck system 1 improves the rigidity and stability of the entire solid-web steel approach bridge, making it more stable and safer during operation. Thirdly, through the setting of the support 3, when the steel approach bridge undergoes thermal expansion and contraction, the limiting seat 33 moves relative to the pad 32, preventing deformation and damage to the steel approach bridge during thermal expansion and contraction, and improving the service life of the steel approach bridge.

[0038] It is worth noting that this type of solid-web steel approach bridge can be used as a fixed steel approach bridge or a movable steel approach bridge by matching different types of bearings 3. The hinged bearings or flat rubber bearings used in this case are only suitable for fixed steel approach bridges. If roller bearings are installed on the solid-web steel approach bridge, the solid-web steel approach bridge can be used as a movable steel approach bridge.

[0039] In a preferred embodiment, the support 3 includes a first support body 34, a second support body 35, and a pin 36. The first support body 34 is fixedly connected to the lower part of the main arch beam 2. The second support body 35 is rotatably connected to the lower end of the first support body 34 via the pin 36. The axial direction of the pin 36 is arranged along the width direction of the solid-web steel approach bridge. The second support body 35 includes an upper support 351, a sliding seat 352, and a pressure block 353. The upper support 351 is rotatably connected to the lower part of the first support body 34 via the pin 36. A slot is provided at the bottom of the upper support 351. The sliding seat 352 is inserted into the slot. The slot is arranged along the width direction of the solid-web steel approach bridge. A groove is provided at the bottom of the sliding seat 352. The pressure block 353 is slidably supported in the groove.

[0040] Specifically, the slot is a dovetail groove, and the slide 352 is inserted into the dovetail groove with an interference fit. The groove at the bottom of the slide 352 is larger than the bearing block 353, so that gaps are left around the bearing block 353. This allows the slide 352 to move relative to the bearing block 353 when the solid-web steel approach bridge undergoes thermal expansion and contraction. The gap between the bearing block 353 and the inner wall of the groove along the width direction of the solid-web steel approach bridge is smaller than the gap along the length direction of the solid-web steel approach bridge. This is because the length of the solid-web steel approach bridge is greater than its width, and the deformation in the length direction is larger during thermal expansion and contraction. Therefore, the gap in the length direction is larger than the gap in the width direction to accommodate the thermal expansion and contraction of the steel approach bridge. The bearing block 353 is made of polytetrafluoroethylene (PTFE), which has high strength, good wear resistance, and good elastic and plastic deformation capabilities. The slide block 352 is installed by plugging and connecting, which makes it easy to replace and maintain when the slide block 352 and the pressure block 353 are damaged.

[0041] In addition, this type of support 3 has a good angle adjustment function, which can alleviate some height errors between the dock and the pier caused by construction. By rotating the first body 34 in the support 3 relative to the second body 35, the supports 3 at both ends of the steel approach bridge can be stably supported on the dock and the pier respectively.

[0042] In a preferred embodiment, the support 3 includes a base 31, a pad 32, and a limiting seat 33. The pad 32 is fixedly connected to the base 31, and the limiting seat 33 is located above the base 31 and fixedly connected to one end of the main arch beam 2. The bottom of the limiting seat 33 is provided with a downward-opening sliding groove 331, and the limiting seat 33 is slidably supported on the pad 32 through the sliding groove 331.

[0043] Understandably, the main arch beam 2 is supported by supports 3, with the supports 3 at both ends of the main arch beam 2 resting on the wharf and the pier respectively. During use, the steel approach bridge expands and contracts with changes in ambient temperature, causing changes in its length. In summer, when temperatures are high, the overall length of the steel approach bridge increases. As the steel approach bridge lengthens, the limiting seat 33 moves relative to the pad 32, while the pad 32 remains below the limiting seat 33, allowing it to be movably supported in the sliding groove 331 of the limiting block. This ensures that the steel approach bridge can still operate normally after elongation. The sliding groove also limits the limiting seat 33, preventing it from slipping off the pad 32 and causing an accident. The sliding groove improves the safety of the steel approach bridge.

[0044] In a preferred embodiment, the pad 32 includes an upper arc pad 321 and a lower arc pad 322. The upper arc pad 321 is slidably connected in the sliding groove 331. The lower part of the upper arc pad 321 is arranged to protrude downward in an arc shape. The lower arc pad 322 is fixedly connected to the base 31. The upper part of the lower arc pad 322 is arranged to be recessed downward in an arc shape. The upper arc pad 321 and the lower arc pad 322 can be rotatably fitted together along the center of the arc shape.

[0045] It should be noted that during the construction of wharves and piers, due to the considerable distance between them, errors in height can easily occur. In previous construction processes, if there was a height difference between the wharves and piers, padding was required at the lower position. The height of the padding needed to be determined based on the height difference between the wharves and piers. However, the height error between the wharves and piers is difficult to measure, making it very difficult and cumbersome to determine the thickness of the padding. Without padding, the upper surface of the pad block 32 cannot fully fit with the bottom surface of the sliding groove 331 in the limiting seat 33. This would cause all the weight of the solid-web steel approach bridge to be supported on the edge of the pad block 32, which could easily lead to the edge of the pad block 32 being crushed, resulting in instability of the solid-web steel approach bridge during use.

[0046] Understandably, by arranging the pads 32 into an upper arc pad 321 and a lower arc pad 322, the upper arc pad 321 can be rotatably embedded in the lower arc pad 322 around an arc. When the angle between the main arch beam 2 and the limiting seat 33 changes, the upper arc seat will move together, causing the angle between the upper arc pad 321 and the lower arc pad 322 to change. During the entire movement, the upper surface of the upper arc seat is always in contact with the sliding groove 331 of the limiting seat 33, and the lower surface of the upper arc seat is always in contact with the arc-shaped recess of the lower arc seat. Therefore, during the support of the main arch beam 2, the upper arc seat and the lower arc seat are always subjected to uniform force, and there will be no situation where the force is concentrated in one place, thereby preventing the pads 32 from being crushed. This achieves the effect of improving the stability of the solid web steel approach bridge and extending its service life.

[0047] In a preferred embodiment, the main arch beam 2 includes an upper flange 21, a lower flange 22, a web 23, and a stiffening plate 24. The lower flange 22 is arranged horizontally, and the middle part of the upper flange 21 is arched upwards in an arch shape. The two ends of the upper flange 21 are fixedly connected to the two ends of the lower flange 22. The web 23 is fixedly connected between the upper flange 21 and the lower flange 22. The stiffening plate 24 is arranged vertically, and the first end of the stiffening plate 24 is fixedly connected to the upper flange 21. The second end of the stiffening plate 24 extends downwards and is fixedly connected to the lower flange 22.

[0048] Understandably, the upper flange 21 arches upwards from its middle section, and the stiffening plate 24 provides tension to the lower flange 22. Throughout this process, the upper flange 21 is under pressure, and the lower flange 22 is under tension. The two ends of the upper flange 21 are fixedly connected to the two ends of the lower flange 22 by welding. The middle section of the upper flange 21 is connected to the lower flange 22 by the web plate 23. Both the upper flange 21 and the web plate 23, and the lower flange 22 and the web plate 23, are fixed by welding. The web plate 23 enhances the rigidity of the upper flange 21 and the lower flange 22, improving the load-bearing capacity of the main arch beam 2. The stiffening plate 24 further enhances the rigidity of the main arch beam 2, improving its resistance to deformation. It is worth noting that the upper flange provides tension to the lower flange through the stiffening plate 24. It should be noted that the upper flange and the lower flange can also be riveted together or detachably connected by bolts.

[0049] In a preferred embodiment, the bridge deck system 1 includes a bridge deck 11, crossbeams 12 and longitudinal beams 13. Multiple crossbeams 12 and longitudinal beams 13 are arranged, and the multiple crossbeams 12 and multiple longitudinal beams 13 are arranged alternately on the lower part of the bridge deck 11. Two main arch beams 2 are fixedly connected to both sides of the bridge deck 11, and the first end of all crossbeams 12 is fixedly connected to one of the main arch beams 2, and the second end of all crossbeams 12 is fixedly connected to the other main arch beam 2.

[0050] Understandably, the bridge deck 11 is connected to the main arch beam 2 on both sides by welding. One end of the crossbeam 12 is welded to the web plate 23 of one side of the main arch beam 2, and the side wall of the crossbeam 12 abuts against the upper surface of the lower flange 22. The second end of the crossbeam 12 is welded to the web plate 23 of the other side of the main beam, and the side wall of the crossbeam 12 abuts against the upper surface of the lower flange 22 of the other side of the main arch beam 2. Multiple crossbeams 12 are evenly distributed along the length of the bridge deck 11 and are arranged parallel to each other. The longitudinal beams 13 are arranged along the length of the bridge deck 11 and multiple longitudinal beams 13 are evenly distributed along the width of the bridge deck 11. Multiple longitudinal beams 13 are welded and fixed to multiple crossbeams 12 perpendicularly to support the bridge deck 11 and improve the deformation resistance of the bridge deck 11.

[0051] Furthermore, the bridge deck system 1 also includes tie rods 14 and node plates 15. Multiple node plates 15 are arranged and fixed on multiple crossbeams 12 respectively. The first end of the tie rod 14 is fixedly connected to one of the node plates 15, and the second end of the tie rod 14 is fixedly connected to the adjacent node plate 15. The tie rods 14 are arranged to cross the crossbeams 12 and the tie rods 14 are arranged to cross the longitudinal beams 13.

[0052] It is understandable that because the crossbeam 12 and the longitudinal beam 13 are arranged vertically to form a parallelogram structure, and the parallelogram structure is prone to deformation during use, by arranging node plates 15 on the crossbeam 12, and connecting two adjacent node plates 15 with diagonal tie rods 14, a triangular structure is formed between the diagonal tie rods 14 and the crossbeam 12, thereby improving the overall deformation resistance of the bridge deck system 1. The node plates 15 are arranged horizontally and are fixedly connected to the crossbeam 12 by welding. The diagonal tie rods 14 are also arranged horizontally, and the two ends of the diagonal tie rods 14 are welded to two adjacent node plates 15 respectively.

[0053] In a preferred embodiment, the system also includes guardrails 4, with two guardrails 4 arranged and fixed to the top of the two main arch beams 2 respectively. The top of the guardrails 4 is horizontally arranged, and the bottom of the guardrails 4 is fixedly connected to the upper flange 21 of the main arch beam 2 and matches the arch shape of the upper flange 21.

[0054] It should be noted that the main arch beam 2 is arranged on both sides of the bridge deck system 1. The middle of the main arch beam 2 is higher and can play a better protective role, but the two ends of the main arch beam 2 are lower and cannot play a good protective role. Therefore, by arranging guardrails 4 separately above the main arch beam 2, the guardrails 4 form supplementary protection for the two ends of the main arch beam 2, thereby further improving the safety of the protection on both sides of the bridge deck 11.

[0055] Furthermore, it also includes connecting iron chains 5, with four connecting iron chains 5 arranged at both ends of the two main arch beams 2.

[0056] Understandably, by connecting the iron chain 5, the solid steel approach bridge located at one end of the dock is fixed to the dock, and the solid steel approach bridge located at one end of the pier is fixed to the pier, thereby improving the stability of the solid steel approach bridge during use.

[0057] In a preferred embodiment, the crossbeam 12 and the longitudinal beam 13 are fixed by welding.

[0058] Understandably, welding is a more reliable method of fixing than riveting or bolting, and it is less likely to loosen, which is beneficial to the connection stability of solid steel approach bridges.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A solid-web steel approach bridge, characterized in that: Includes the bridge deck system (1), the main arch beam (2), and the supports (3). Two main arch beams (2) are arranged, and the two main arch beams (2) are respectively arranged on both sides of the bridge deck system (1), and the two main arch beams (2) are fixedly connected to the bridge deck system (1). Four supports (3) are arranged, and the four supports (3) are respectively arranged at the lower part of both ends of the two main arch beams (2). The middle part of the main arch beams (2) is arched upward.

2. A solid-web steel approach bridge according to claim 1, characterized in that: The support (3) includes a first support body (34), a second support body (35), and a pin (36). The first support body (34) is fixedly connected to the lower part of the main arch beam (2). The second support body (35) is rotatably connected to the lower end of the first support body (34) through the pin (36). The axial direction of the pin (36) is arranged along the width direction of the solid-web steel approach bridge. The second support body (35) includes an upper support (351), a sliding seat (352), and a pressure block (353). The upper support (351) is rotatably connected to the lower part of the first support body (34) through the pin (36). The bottom of the upper support (351) is provided with a slot. The sliding seat (352) is inserted into the slot. The slot is arranged along the width direction of the solid-web steel approach bridge. The bottom of the sliding seat (352) is provided with a groove. The pressure block (353) is slidably supported in the groove.

3. A solid-web steel approach bridge according to claim 1, characterized in that: The support (3) includes a base (31), a pad (32) and a limiting seat (33). The pad (32) is fixedly connected to the base (31). The limiting seat (33) is located above the base (31) and is fixedly connected to one end of the main arch beam (2). The bottom of the limiting seat (33) is provided with a downward-opening sliding groove (331). The limiting seat (33) is slidably supported on the pad (32) through the sliding groove (331).

4. A solid-web steel approach bridge according to claim 3, characterized in that: The pad (32) includes an upper arc pad (321) and a lower arc pad (322). The upper arc pad (321) is slidably connected in the sliding groove (331). The lower part of the upper arc pad (321) is arranged in an arc shape and protrudes downward. The lower arc pad (322) is fixedly connected to the base (31), and the upper part of the lower arc pad (322) is arc-shaped and recessed downward. The upper arc pad (321) and the lower arc pad (322) can be rotatably fitted together along the center of the arc.

5. A solid-web steel approach bridge according to any one of claims 2-4, characterized in that: The main arch beam (2) includes an upper flange (21), a lower flange (22), a web (23), and a stiffening plate (24). The lower flange (22) is arranged horizontally, and the middle part of the upper flange (21) is arched upwards in an arch shape. The two ends of the upper flange (21) are fixedly connected to the two ends of the lower flange (22). The web (23) is fixedly connected between the upper flange (21) and the lower flange (22). The stiffening plate (24) is arranged vertically, and the first end of the stiffening plate (24) is fixedly connected to the upper flange (21). The second end of the stiffening plate (24) extends downwards and is fixedly connected to the lower flange (22).

6. A solid-web steel approach bridge according to claim 5, characterized in that: The bridge deck system (1) includes a bridge deck (11), crossbeams (12) and longitudinal beams (13). Multiple crossbeams (12) and multiple longitudinal beams (13) are arranged. Multiple crossbeams (12) and multiple longitudinal beams (13) are arranged alternately on the lower part of the bridge deck (11). Two main arch beams (2) are fixedly connected to both sides of the bridge deck (11). The first end of all crossbeams (12) is fixedly connected to one of the main arch beams (2), and the second end of all crossbeams (12) is fixedly connected to the other main arch beam (2).

7. A solid-web steel approach bridge according to claim 6, characterized in that: The bridge deck system (1) also includes tie rods (14) and node plates (15). Multiple node plates (15) are arranged and fixed on multiple crossbeams (12). The first end of the tie rod (14) is fixedly connected to one of the node plates (15), and the second end of the tie rod (14) is fixedly connected to another adjacent node plate (15). The tie rods (14) are arranged to cross the crossbeams (12) and the tie rods (14) are arranged to cross the longitudinal beams (13).

8. A solid-web steel approach bridge according to claim 7, characterized in that: It also includes guardrails (4), two of which are arranged and fixed to the top of the two main arch beams (2).

9. A solid-web steel approach bridge according to claim 8, characterized in that: The top of the guardrail (4) is arranged horizontally, and the bottom of the guardrail (4) is fixedly connected to the upper flange (21) of the main arch beam (2) and matches the arch shape of the upper flange (21).

10. A solid-web steel approach bridge according to claim 9, characterized in that: It also includes connecting chains (5), of which four chains (5) are arranged at the two ends of the two main arch beams (2).

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