Fabricated bridge structure

Abstract

The invention provides an assembly type bridge structure, and belongs to the field of assembly type bridges, the assembly type bridge structure comprises a splicing part, the splicing part comprises a box type main beam, a prefabricated cantilever is arranged on the outer side of the box type main beam, cantilever connecting bolt holes are formed in the box type main beam and the prefabricated cantilever, and a handrail connecting plate is fixedly connected to the outer side of the prefabricated cantilever; positioning plates are fixedly connected to the outer sides of the handrail connecting plates, stand column positioning blocks are slidably connected to the inner sides of the positioning plates, handrail stand columns are fixedly connected to the tops of the stand column positioning blocks, handrail handrails are fixedly connected to the tops of the handrail stand columns, and a bridge floor forming assembly is arranged at the top of the box type main beam; the box-type main beam, the prefabricated cantilevers and the railing stand columns are spliced and installed through modular structures. According to the invention, through the arrangement of the splicing parts, the pedestrian bridge is modularly disassembled and installed, so that the assembly degree of the pedestrian bridge in the mountainous region is improved, the construction difficulty of the bridge is greatly reduced, the field welding workload is reduced, and the construction quality and the installation precision of the bridge are effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated bridges, and specifically relates to a prefabricated bridge structure. Background Technology

[0002] Currently, commonly used prefabricated bridge structures in China are mainly divided into concrete structures and steel structures based on the different bridge materials. Concrete structures, due to their better economic efficiency, are widely used in urban areas, highways, and other large-scale vehicular bridges with wide construction sites. These bridges have small longitudinal slopes, large widths, and spans of 10-40 meters. Individual projects often involve a large number of bridges on a large scale, and construction can be carried out using truck cranes or bridge erecting machines, depending on the terrain. However, for pedestrian bridges in mountainous areas, the bridge width is typically 3-6 meters, the longitudinal slope is often around 8%, and there are even cases where the curve radius is only about 10 meters. In such cases, concrete structures using bridge erecting machines are not suitable due to their large self-weight and the need for large lifting equipment. Steel structures are generally used in these projects.

[0003] For pedestrian bridges in mountainous areas, although using steel structures can effectively reduce the bridge's self-weight and construction difficulty, the bridge width is 3-6m and the self-weight of a single segment exceeds 30t. This requires further segmentation to reduce the segment's self-weight and ease the lifting difficulty, followed by on-site welding. This results in a huge amount of on-site welding work, a long welding cycle, and difficulty in guaranteeing welding quality. Moreover, the steep terrain also brings a series of problems such as difficulty in controlling the bridge installation accuracy, which greatly reduces construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated bridge structure that addresses the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A prefabricated bridge structure includes splicing components, including a box girder main beam. A prefabricated cantilever is provided on the outer side of the box girder main beam. Both the box girder main beam and the prefabricated cantilever have cantilever connection bolt holes inside. A railing connecting plate is fixedly connected to the outer side of the prefabricated cantilever. A positioning plate is fixedly connected to the outer side of the railing connecting plate. A column positioning block is slidably connected to the inner side of the positioning plate. A railing post is fixedly connected to the top of the column positioning block. A railing handrail is fixedly connected to the top of the railing post. A bridge deck component is provided on the top of the box girder main beam. The box girder main beam, prefabricated cantilever, and railing post are spliced ​​and installed using a modular structure. A quick-assembly component includes a pointed plate slidably connected inside the column positioning block. A first insert block is fixedly connected to the outer side of the pointed plate. The inner side of the pointed plate is provided with an elastic abutment component, and the inside of the railing post is provided with a trigger component. The trigger component includes a forked push block and a slider. The inside of the forked push block is provided with a guide groove, and the inside of the guide groove is slidably connected with a guide post. The inside of the guide post is fixedly connected with a second insert block. The inside of the railing connecting plate is provided with a slot that engages with the second insert block. The positioning plate and the post positioning block are installed by engaging with a first insert block. The protective component includes a rotating seat fixedly connected to the front of the railing post. The inside of the rotating seat is rotatably connected with a bending strip. The top of the bending strip is fixedly connected with a cover. The inside of the cover is fixedly connected with a limit plate. The top of the cover is provided with a fixing component. The cover prevents accidental contact by covering the outside of the slider.

[0007] As a preferred embodiment of the prefabricated bridge structure of the present invention, the bridge deck component includes a small longitudinal beam fixedly connected to the top of the box girder, and a bridge deck steel grating is fixedly connected to the top of the small longitudinal beam.

[0008] As a preferred embodiment of the prefabricated bridge structure of the present invention, the positioning plate has a slot inside, and there are two slots symmetrically arranged along the center of the positioning plate. The column positioning block has inserts on both sides, and the inserts are embedded in the slots.

[0009] As a preferred embodiment of the prefabricated bridge structure of the present invention, the elastic abutment component includes a limiting rod fixedly connected inside the column positioning block, and a first spring sleeved on the outside of the limiting rod is provided on the inner side of the pointed plate.

[0010] As a preferred embodiment of the prefabricated bridge structure of the present invention, the triggering component further includes a second spring disposed between the top of the bifurcated push block and the inner wall of the railing post, the outside of the bifurcated push block is slidably connected to the inside of the railing post, and the back of the slider is fixedly connected to the front of the bifurcated push block.

[0011] As a preferred embodiment of the prefabricated bridge structure of the present invention, the top of the pointed plate is provided with a pointed tip that tilts inward and upward, and the two pointed tips are symmetrically arranged, with the inclined surface located on the side close to the inner wall of the column positioning block.

[0012] As a preferred embodiment of the prefabricated bridge structure of the present invention, the bottom of the bifurcated push block is provided with a conical head that is inclined inward, and the tip of the conical head is embedded between the tip of the pointed plate and the inner wall of the column positioning block.

[0013] As a preferred embodiment of the prefabricated bridge structure of the present invention, the positioning plate has uniformly distributed fixing holes inside, and the size of the holes corresponds to that of the first insert block.

[0014] As a preferred embodiment of the prefabricated bridge structure of the present invention, the fixing component includes a perforated block fixedly connected to the top of the cover, and an internal hexagon bolt that is threadedly connected to the inner wall of the railing column is slidably connected inside the perforated block.

[0015] As a preferred embodiment of the prefabricated bridge structure of the present invention, the limiting folding plate is disposed on the bottom inner wall of the cover, tilted backward, and positioned below the slider.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By using modular splicing components, the assembly of pedestrian bridges in mountainous areas is improved, significantly reducing construction difficulty, on-site welding workload, and construction quality and installation accuracy. Bridge construction can be flexibly arranged according to the actual terrain, and the minimum lifting weight can be controlled within 10t. This reduces the specifications of construction machinery and avoids the damage to the ecological environment caused by the construction of large-scale access roads. The approach of breaking down the whole into parts divides the bridge structure into prefabricated segments and components, with most of the work done in the factory. On-site work is only required for connecting the components, which can effectively improve construction efficiency.

[0018] 2. By using the quick-release components and the elastic force of the first spring, the first insert can engage with the insertion hole of the positioning plate, which can quickly fix the railing post. With the guidance of the guide groove and the guide post, the second insert can be longitudinally fixed, further improving the stability of the engagement structure.

[0019] 3. By using the protective components, the sliding block is blocked by the flip-up cover, which can prevent unauthorized personnel from touching the switch of the snap-fit ​​structure. The limit plate can follow the rotation of the cover to limit the sliding block, further improving the safety of the snap-fit ​​structure switch. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the external structure of a prefabricated bridge structure.

[0022] Figure 2 This is an exploded structural diagram of the splicing components of a prefabricated bridge structure.

[0023] Figure 3 A schematic diagram of the external structure of the positioning plate in a prefabricated bridge structure.

[0024] Figure 4 A schematic diagram of the external structure of the column positioning block in a prefabricated bridge structure.

[0025] Figure 5 This is a schematic diagram of the external structure of quick-assembly components for prefabricated bridge structures.

[0026] Figure 6 This is a schematic diagram of the external structure of the trigger component in a prefabricated bridge structure.

[0027] Figure 7 This is a schematic diagram of the external structure of the bifurcated push block in a prefabricated bridge structure.

[0028] Figure 8 This is a schematic diagram of the external structure of the protective components of a prefabricated bridge structure.

[0029] Figure 9 This is a cross-sectional structural diagram of the protective components of a prefabricated bridge structure.

[0030] In the diagram: 10. Box girder; 11. Precast cantilever; 12. Cantilever connecting bolt holes; 13. Guardrail connecting plate; 14. Positioning plate; 15. Column positioning block; 16. Guardrail column; 17. Guardrail handrail; 18. Bridge deck component; 181. Bridge deck longitudinal beam; 182. Bridge deck steel grating; 20. Pointed plate; 21. First insert block; 22. Elastic contact component; 221. Limiting rod; 222. First spring; 23. Triggering component; 231. Forked push block; 232. Slider; 233. Second spring; 24. Guide groove; 25. Guide post; 26. Second insert block; 27. Slot; 30. Rotating seat; 31. Bending strip; 32. Cover; 33. Limiting folding plate; 34. Fixing component; 341. Through-hole block; 342. Hex socket head cap bolt. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Reference Figure 1 - Figure 4 This is the first embodiment of the present invention, which provides a prefabricated bridge structure that reduces the construction difficulty of pedestrian bridges in mountainous areas. It includes splicing components, including a box girder 10, with prefabricated cantilever 11 on the outer side of the box girder 10. Both the box girder 10 and the prefabricated cantilever 11 have cantilever connection bolt holes 12 inside. A railing connecting plate 13 is fixedly connected to the outer side of the prefabricated cantilever 11, and a positioning plate 14 is fixedly connected to the outer side of the railing connecting plate 13. A column positioning block 15 is slidably connected to the inner side of the positioning plate 14. A railing post 16 is fixedly connected to the top of the column positioning block 15, and a railing handrail 17 is fixedly connected to the top of the railing post 16. A bridge deck component 18 is provided on the top of the box girder 10. The box girder 10, prefabricated cantilever 11, and railing post 16 are spliced ​​and installed through a modular structure. A quick-assembly component includes a pointed plate 20 slidably connected inside the column positioning block 15. A first insert 21 is fixedly connected to the outer side of the 20. An elastic abutment component 22 is provided on the inner side of the pointed plate 20. A trigger component 23 is provided inside the railing post 16. The trigger component 23 includes a forked push block 231 and a slider 232. A guide groove 24 is opened inside the forked push block 231. A guide post 25 is slidably connected inside the guide groove 24. A second insert 26 is fixedly connected to the inner side of the guide post 25. A slot 27 is opened inside the railing connecting plate 13 to engage with the second insert 26. The positioning plate 14 and the post positioning block 15 are installed by engaging with the first insert 21. The protective component includes a rotating seat 30 fixedly connected to the front of the railing post 16. A bending strip 31 is rotatably connected inside the rotating seat 30. A cover 32 is fixedly connected to the top of the bending strip 31. A limit folding plate 33 is fixedly connected inside the cover 32. A fixing component 34 is provided on the top of the cover 32. The cover 32 prevents accidental contact by covering the outside of the slider 232.

[0034] Specifically, the modular, weld-free pedestrian bridge can be assembled on-site using the prefabricated splicing components. The main structure consists of a box girder 10, precast cantilever 11, railing posts 16, bridge deck longitudinal beams 181, and bridge deck steel grating 182. All components can be manufactured in the factory. After arriving on-site, the components are installed using bolts and snap-fit ​​connections without welding. During construction, the box girder 10 can be rationally segmented according to the site terrain and equipment lifting capacity. After on-site hoisting, the box girder 10 is connected to the precast cantilever 11 using bolts, and the railing posts 16 are connected using snap-fit ​​structures. After erection, the box girder 10 can serve as an installation platform for the subsequent assembly of the precast cantilever 11, railing posts 16, bridge deck longitudinal beams 181, and bridge deck steel grating 182, which can be installed manually and with small machinery.

[0035] The box girder 10 is made of steel and is arranged along the centerline of the bridge. Depending on the width of the bridge, it can be a single box structure or a multi-box structure. When a multi-box structure is used, a box-separated structure is generally adopted to facilitate the segment division and on-site installation of the box girder. The boxes are connected by transverse diaphragms. At the same time, along the longitudinal direction of the bridge, it can be divided into segments according to the site terrain and the lifting capacity of the hoisting equipment. The segments are connected by bolts, which makes construction convenient and the connection accurate.

[0036] Precast cantilever arms 11 are installed on both sides of the box girder 10. Cantilever connection bolt holes 12 are arranged on the connecting plate in a one-to-one correspondence with the precast cantilever arms 11. After the box girder 10 is hoisted, the precast cantilever arms 11 on both sides can be connected on the bridge deck. The precast cantilever arms 11 and the box girder 10 are connected by bolts, which greatly reduces the amount of on-site welding work and facilitates construction.

[0037] The prefabricated cantilever structures 11 on both sides adopt a triangular frame structure, which not only ensures the stability of the structure itself, but also saves steel and reduces its weight. The right end of the cantilever structure is a connecting plate, on which cantilever connecting bolt holes 12 are arranged at the position corresponding to the box beam 10. High-strength bolts are used for connection during construction. The left end of the cantilever structure is a railing connecting plate 13, which is welded to the end of the cantilever. During construction, the railing connecting plate 13 and the cantilever structure can be constructed simultaneously in the factory, reducing the amount of on-site welding work. The railing consists of railing posts 16 and railing handrails 17. The lower end of the railing posts 16 is provided with a snap-fit ​​structure, which only needs to be aligned and inserted for installation during construction.

[0038] Since there are many railing posts 16, it would be cumbersome to install them all with bolts. The quick-installation mechanism allows for the rapid connection and installation of multiple railing posts 16 to the prefabricated cantilever 11. Before the post positioning block 15 is inserted into the positioning plate 14, the slider 232 is slid down. The inclined plane pushes the pointed plates 20 on both sides, causing the first insert 21 to enter the post positioning block 15. When the post positioning block 15 is fully inserted, the slider 232 can be released, allowing the first insert 21 to embed into the insertion hole inside the positioning plate 14. During the reset process of the slider 232, the guide groove 24 guides the guide post 25 to insert the second insert 26 into the slot 27, further laterally locking the snap-fit ​​structure and preventing the installed railing posts 16 from loosening, thus improving their stability.

[0039] To prevent unauthorized personnel from easily unlocking the locking mechanism, protective components are installed to shield the slider 232. First, a flip-up cover 32 can cover the top of the slider 232 to prevent unauthorized personnel from touching it. Second, the hexagon socket head cap 342 can only be removed with specific tools, further preventing the cover 32 from being disassembled by others. At the same time, the hexagon socket head cap 342 only has a partial thread at its tail end, so it can be removed without turning it many times, further ensuring the convenience of installation and removal. The limiting baffle 33 set inside the cover 32 can abut against the slider 232, preventing it from sliding downwards in its natural state, thus ensuring that the locking mechanism cannot be unlocked in the protected state.

[0040] Furthermore, the bridge deck component 18 includes a bridge deck longitudinal beam 181 fixedly connected to the top of the box girder 10, and a bridge deck steel grating 182 is fixedly connected to the top of the bridge deck longitudinal beam 181.

[0041] The bridge deck uses a combination of small longitudinal beams and steel grating panels. Both components are manufactured in the factory. On-site, only the small longitudinal beams 181 of the bridge deck need to be laid, and then the steel grating is fixed to the steel grating 182 of the bridge deck.

[0042] Preferably, the positioning plate 14 has a notch inside, and there are two notches symmetrically arranged along the center of the positioning plate 14. The column positioning block 15 has inserts on both sides, and the inserts are embedded in the notch.

[0043] It should be noted that the notch inside the positioning plate 14 is for easy positioning and insertion. By inserting the insert into the notch, it can be ensured that the railing posts 16 on one side remain neat and at the same height.

[0044] In use, firstly, the box girder 10 is installed to the mountainous site using hoisting equipment. After the splicing and installation are completed, the prefabricated cantilever 11 is hoisted so that the cantilever connecting bolt holes 12 inside it correspond to the cantilever connecting bolt holes 12 inside the box girder 10. Then, high-strength bolts are used to connect and fix the box girder 10 and the prefabricated cantilever 11. After the two are fixed, the railing post 16 can be installed.

[0045] Since the railing connecting plate 13 has been welded and installed to the end of the prefabricated cantilever 11 before leaving the factory, it is only necessary to insert the post positioning block 15 at the bottom of the railing post 16 into the inner side of the two opposing positioning plates 14, so that the insert of the post positioning block 15 is inserted into the notch inside the positioning plate 14, and then inserted downwards, so that the post positioning block 15 is fixed inside the positioning plate 14. Since the positioning plate 14 is fixedly connected to the railing connecting plate 13, and the top of the post positioning block 15 is fixedly connected to the bottom of the railing post 16, pressing down only needs to continue until the railing post 16 stops moving down. Through the snap-fit ​​structure inside the post positioning block 15, the fixing can be completed directly, and the railing post 16 is fixed at this time.

[0046] After the railing post 16 is fixed, the bridge deck longitudinal beam 181 can be laid directly on the top of the box girder 10. After the bridge deck longitudinal beam 181 is laid, the bridge deck steel grating 182 can be laid directly on the top of the bridge deck longitudinal beam 181.

[0047] In summary, modular assembly of pedestrian bridges reduces the difficulty of bridge construction and effectively improves bridge construction quality, installation accuracy, and efficiency.

[0048] Example 2

[0049] Reference Figure 5 - Figure 7 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a quick-installation component for the prefabricated bridge structure, which solves the problem of inconvenience in installing multiple railing posts 16. It includes an elastic abutment component 22, which includes a limiting rod 221 fixedly connected inside the post positioning block 15. A first spring 222 sleeved on the outside of the limiting rod 221 is provided on the inner side of the pointed plate 20. The trigger component 23 also includes a second spring 233 disposed between the top of the forked push block 231 and the inner wall of the railing post 16. The outside of the forked push block 231 is slidably connected to the inside of the railing post 16, and the back of the slider 232 is fixedly connected to the front of the forked push block 231.

[0050] Specifically, both ends of the first spring 222 are fixed to the inner side of the pointed plate 20. Since the pointed plate 20 is limited by the limiting rod 221, it will squeeze the first spring 222 when the pointed plate 20 moves inward. The slider 232 penetrates the inner wall of the entire railing post 16 and is connected to the forked push block 231. When the slider 232 slides down, it will cause the forked push block 231 to pull the second spring 233, so that it changes from a compressed state to a stretched state.

[0051] Furthermore, the top of the pointed plate 20 is provided with a pointed tip that slopes inward and upward, and the two pointed tips are symmetrically arranged. The inclined surface is located on the side close to the inner wall of the column positioning block 15. The bottom of the forked push block 231 is provided with a conical head that slopes inward. The tip of the conical head is embedded between the pointed tip of the pointed plate 20 and the inner wall of the column positioning block 15. The interior of the positioning plate 14 is provided with evenly distributed fixing holes, and the size of the holes corresponds to that of the first insert block 21.

[0052] In its initial state, the pointed end has a small gap with the inner wall of the column positioning block 15, and the lower end of the forked push block 231 is embedded in the gap. As the forked push block 231 descends, the inclined surfaces will come into contact, thereby causing the first insert block 21 to retract into the interior of the column positioning block 15.

[0053] In use, before inserting the post positioning block 15 into the inner side of the positioning plate 14, first slide the slider 232, causing the slider 232 to drive the forked push block 231 to descend. At this time, the second spring 233 is stretched and elongated. When the forked push block 231 descends, it will contact the tip of the tip plate 20, thereby causing the tip plate 20 to move inward. The tip plate 20 will drive the first insert block 21 to retract into the interior of the post positioning block 15. Then, insert the post positioning block 15 into the inner side of the positioning plate 14. When the post positioning block 15 is inserted to the limit position, release the slider 232, causing the second spring 233 to drive the slider 232 to return to its original position. At this time, the first spring 222 will also return from the compressed state, sending the first insert block 21 into the insertion hole of the positioning plate 14. At this time, the snap-fit ​​fixing of the railing post 16 can be completed.

[0054] When the forked pusher 231 descends, it causes the position of the guide groove 24 to change. At this time, the guide post 25 drives the second insert 26 to slide into the post positioning block 15, causing the second insert 26 to leave the slot 27. When the first insert 21 is inserted, the second spring 233 pulls the forked pusher 231 upward, so the inclined groove will reset, causing the guide post 25 to push the second insert 26 again, so that it is inserted into the slot 27, and the fixed railing post 16 is locked laterally.

[0055] In summary, the snap-fit ​​structure allows the railing post 16 to be quickly snapped into place during installation. Furthermore, the guide groove 24 and guide post 25 enable the second insert block 26 to snap into place laterally, further improving stability.

[0056] Example 3

[0057] Reference Figure 8 - Figure 9 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a protective component for the prefabricated bridge structure, which solves the problem that the exposed slider 232 can be touched by unauthorized personnel. It includes a fixing component 34, including a perforated block 341 fixedly connected to the top of the cover 32. The perforated block 341 is slidably connected to an internal hexagon bolt 342 that is threaded to the inner wall of the railing post 16.

[0058] Specifically, by passing the hexagon socket head cap screw 342 through the interior of the through-hole block 341, it can be threaded to the railing post 16. Since the end of the hexagon socket head cap screw 342 is only partially threaded, it can be quickly disassembled and installed using specific tools.

[0059] Furthermore, the limiting baffle 33 is disposed on the bottom inner wall of the cover 32, tilted backward, and positioned below the slider 232.

[0060] The inclined limiting plate 33 can be positioned below the slider 232 when the cover 32 is closed, thus further limiting the slider 232 and preventing it from sliding downwards when the cover is closed.

[0061] In use, after fixing the railing post 16, simply flip the cover 32. Through the connection between the rotating seat 30 and the bending strip 31, the cover 32 covers the surface of the slider 232. Then, the hexagon socket bolt 342 passes through the through-hole block 341 and enters the interior of the railing post 16. When the hexagon socket bolt 342 slides to its limit position, rotate the hexagon socket bolt 342 to make a threaded connection between the hexagon socket bolt 342 and the railing post 16, thus completing the fixing of the cover 32.

[0062] When the cover 32 is in a fixed state, the limiting plate 33 will be placed at the bottom of the slider 232, so that the slider 232 cannot slide down normally. In other words, the slider 232 is in a further locked state, which further increases the security of the railing post 16.

[0063] In summary, by flipping the cover 32, the slider 232 can be blocked, thereby preventing unauthorized personnel from touching the slider 232 to unlock it.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A prefabricated bridge structure, characterized in that: include, The splicing components include a box-type main beam (10), a prefabricated cantilever (11) is provided on the outside of the box-type main beam (10), and cantilever connection bolt holes (12) are opened in the inside of both the box-type main beam (10) and the prefabricated cantilever (11). A railing connection plate (13) is fixedly connected to the outside of the prefabricated cantilever (11), a positioning plate (14) is fixedly connected to the outside of the railing connection plate (13), a column positioning block (15) is slidably connected to the inside of the positioning plate (14), a railing column (16) is fixedly connected to the top of the column positioning block (15), a railing handrail (17) is fixedly connected to the top of the railing column (16), and a bridge deck component (18) is provided on the top of the box-type main beam (10). The box-type main beam (10), the prefabricated cantilever (11) and the railing column (16) are spliced ​​and installed through a modular structure. The quick-installation component includes a pointed plate (20) that is slidably connected inside the column positioning block (15). A first insert (21) is fixedly connected to the outside of the pointed plate (20). An elastic abutment component (22) is provided on the inside of the pointed plate (20). A trigger component (23) is provided inside the railing column (16). The trigger component (23) includes a forked push block (231) and a slider (232). A guide groove (24) is opened inside the forked push block (231). A guide post (25) is slidably connected inside the guide groove (24). A second insert (26) is fixedly connected to the inside of the guide post (25). A slot (27) is opened inside the railing connecting plate (13) to engage with the second insert (26). The positioning plate (14) and the column positioning block (15) are engaged and installed by the first insert (21). The protective component includes a rotating seat (30) fixedly connected to the front of the railing post (16), a bending strip (31) is rotatably connected inside the rotating seat (30), a cover (32) is fixedly connected to the top of the bending strip (31), a limiting plate (33) is fixedly connected inside the cover (32), a fixing component (34) is provided on the top of the cover (32), and the cover (32) prevents accidental contact by covering the outside of the slider (232).

2. The prefabricated bridge structure according to claim 1, characterized in that: The bridge deck component (18) includes a bridge deck longitudinal beam (181) fixedly connected to the top of the box girder (10), and a bridge deck steel grating (182) is fixedly connected to the top of the bridge deck longitudinal beam (181).

3. The prefabricated bridge structure according to claim 1, characterized in that: The positioning plate (14) has a slot inside. There are two slots, which are symmetrically arranged along the center of the positioning plate (14). The column positioning block (15) has inserts on both sides, which are embedded in the slots.

4. The prefabricated bridge structure according to claim 1, characterized in that: The elastic abutment component (22) includes a limiting rod (221) fixedly connected inside the column positioning block (15), and a first spring (222) sleeved on the outside of the limiting rod (221) is provided on the inner side of the pointed plate (20).

5. A prefabricated bridge structure according to claim 1, characterized in that: The triggering component (23) also includes a second spring (233) disposed between the top of the forked push block (231) and the inner wall of the railing post (16). The outside of the forked push block (231) is slidably connected to the inside of the railing post (16), and the back of the slider (232) is fixedly connected to the front of the forked push block (231).

6. A prefabricated bridge structure according to claim 5, characterized in that: The top of the pointed plate (20) is provided with a pointed tip that slopes inward and upward, and the two pointed tips are symmetrically arranged. The inclined surface is located on the side close to the inner wall of the column positioning block (15).

7. A prefabricated bridge structure according to claim 6, characterized in that: The bottom of the forked push block (231) is provided with a cone-shaped head that is inclined inward, and the tip of the cone-shaped head is embedded between the tip of the pointed plate (20) and the inner wall of the column positioning block (15).

8. A prefabricated bridge structure according to claim 1, characterized in that: The positioning plate (14) has uniformly distributed fixing holes inside, and the size of the holes corresponds to that of the first plug block (21).

9. A prefabricated bridge structure according to claim 1, characterized in that: The fixing component (34) includes a perforated block (341) fixedly connected to the top of the cover (32), and the perforated block (341) is slidably connected to an internal hexagon bolt (342) that is threaded to the inner wall of the railing post (16).

10. A prefabricated bridge structure according to claim 1, characterized in that: The limiting baffle (33) is located on the bottom inner wall of the cover (32), tilted backward, and positioned below the slider (232).

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