Bridge prefabricated assembly structure and bridge

Abstract

The bridge prefabricated assembly structure comprises an L-shaped prefabricated structure and a shear convex key assembly, the L-shaped prefabricated structure comprises a prefabricated horizontal section and a prefabricated vertical section, the prefabricated vertical section is arranged at the end, away from an existing bridge, of the prefabricated horizontal section, and the shear convex key assembly is arranged at the end, away from the existing bridge, of the prefabricated horizontal section. The shearing force convex key assembly comprises a plurality of top plate shearing force convex keys, web plate shearing force convex keys, bottom plate shearing force convex keys and transverse positioning shearing force convex keys. The prefabricated horizontal section and the prefabricated vertical section are each provided with a prefabricated section embedded hole channel allowing a steel beam to penetrate through. In this way, the stress performance of the L-shaped prefabricated structure after assembly and connection is improved by arranging the shear keys in different areas, and meanwhile, the pre-positioning capacity of the structure during assembly and connection can be enhanced through the transverse positioning shear convex keys, so that the construction efficiency and accuracy are improved; and by combining the steel beam prestress penetrating through the pre-buried hole channel of the prefabricated section, the structure connecting quality and the overall performance of the assembled structure can be improved, the concrete cracking risk is reduced, and the service life of the structure is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a prefabricated bridge assembly structure and a bridge. Background Technology

[0002] In modern bridge engineering, precast beams have become one of the more commonly used construction methods due to their advantages such as strict quality control and parallel manufacturing and construction progress. Using precast beams can significantly shorten the construction period and ensure the quality of the beams, resulting in obvious economic and social benefits. However, there are still some problems that need to be solved in the connection of existing precast beam structures.

[0003] First, conventional shear key designs cannot fully utilize the load-bearing capacity of precast beam structures at the connection points, leading to stress concentration and concrete cracking during use, which seriously affects the safety and durability of bridges. Second, the lack of effective positioning measures during on-site assembly of precast beams makes them prone to misalignment, reducing construction accuracy and efficiency, and adversely affecting construction progress and costs. Furthermore, the overall performance of precast beam structures after connection is difficult to guarantee, with connection points often becoming "weak links" for crack initiation and propagation. Once cracks appear, the service life of the bridge structure will be greatly shortened, increasing subsequent maintenance costs.

[0004] In view of this, it is necessary to propose a prefabricated bridge assembly structure and a bridge to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a prefabricated bridge assembly structure and bridge to solve the problems of insufficient shear key bearing capacity, positioning difficulties and difficulty in guaranteeing overall performance in the connection of existing prefabricated beam structures.

[0006] To achieve the above objectives, this utility model provides a prefabricated bridge assembly structure, including an L-shaped prefabricated structure and a shear key assembly; wherein,

[0007] The L-shaped prefabricated structure includes a prefabricated horizontal section and a prefabricated vertical section. The prefabricated vertical section is located at the end of the prefabricated horizontal section furthest from the existing bridge. The shear key assembly includes multiple top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys.

[0008] The top plate shear key protrudes from the top end of the connecting side of the precast horizontal section, the web plate shear key protrudes from the connecting side of the precast horizontal section, the bottom plate shear key protrudes from the connecting side of the precast vertical section, and the bottom of the precast horizontal section protrudes downward to form the transverse positioning shear key.

[0009] Both the precast horizontal section and the precast vertical section are provided with precast section embedded channels for steel strands to pass through.

[0010] Preferably, the top end of the connecting side of the prefabricated horizontal section includes a top plate section and two flange sections arranged on both sides of the top plate section along the transverse bridge direction. A plurality of top plate shear protrusions are arranged at intervals along the transverse bridge direction, and the top plate section and the flange sections are both provided with the top plate shear protrusions.

[0011] Preferably, a plurality of web shear protrusions are arranged vertically at intervals to form a web shear protrusion group, and the number of web shear protrusion groups is multiple, and the plurality of web shear protrusion groups are arranged horizontally at intervals on the connecting side of the prefabricated horizontal section.

[0012] Preferably, the transverse positioning shear key is in the shape of a quadrangular prism, and multiple transverse positioning shear keys are arranged at intervals along the transverse bridge direction.

[0013] Preferably, a plurality of the base plate shear protrusions are arranged at intervals along the transverse bridge direction, and a transverse positioning shear protrusion is provided between every two adjacent base plate shear protrusions.

[0014] Preferably, the width of the top plate shear key of the flange segment is smaller than the width of the top plate shear key of the top plate segment.

[0015] Preferably, it also includes anchor blocks, and the precast section embedded ducts include precast section longitudinal embedded ducts, wherein the L-shaped precast structure is recessed on the side away from the existing bridge to form hollow grooves arranged opposite each other along the transverse direction of the bridge, and each hollow groove is connected to the anchor blocks at both ends along the transverse direction of the bridge, and each anchor block is provided with the precast section longitudinal embedded ducts.

[0016] Preferably, each anchor block has two pre-embedded longitudinal channels arranged vertically at intervals. The upper pre-embedded longitudinal channel extends into the pre-fabricated horizontal section, and the lower pre-embedded longitudinal channel extends into the pre-fabricated vertical section.

[0017] Preferably, the precast section embedded duct also includes a precast section vertical embedded duct. The top of the precast horizontal section near the existing bridge end is provided with multiple anchoring slots along the transverse direction, and each anchoring slot is provided with a precast section vertical embedded duct.

[0018] This application also provides a bridge, including an existing bridge and a shear key assembly. The end of the existing bridge is L-shaped, and the end of the existing bridge includes a horizontal section and a vertical section. The shear key assembly includes multiple top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate shear keys are recessed at the top end of the connecting side of the vertical section of the existing bridge, the web shear keys are recessed on the connecting side of the vertical section of the existing bridge, and the bottom plate shear keys are recessed on the connecting side of the horizontal section of the existing bridge. The top of the existing bridge's horizontal section is recessed downwards to form the transverse positioning shear key, and the end of the existing bridge is also provided with pre-embedded ducts. The structure also includes the bridge prefabrication assembly structure described above, wherein the top plate shear key of the prefabrication assembly structure corresponds to the top plate shear key, the web plate shear key corresponds to the web plate shear key, the bottom plate shear key corresponds to the bottom plate shear key, the transverse positioning shear key corresponds to the transverse positioning shear key, and the prefabricated section pre-embedded duct corresponds to the pre-embedded duct of the existing bridge.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model provides a prefabricated bridge assembly structure and a bridge, including an L-shaped prefabricated structure and a shear key assembly. The L-shaped prefabricated structure includes a prefabricated horizontal section and a prefabricated vertical section. The prefabricated vertical section is located at the end of the prefabricated horizontal section away from the existing bridge. The shear key assembly includes multiple top plate shear keys, web plate shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate shear keys protrude from the top of the connecting side of the prefabricated horizontal section, the web plate shear keys protrude from the connecting side of the prefabricated horizontal section, and the bottom plate shear keys protrude from the connecting side of the prefabricated vertical section. The bottom of the prefabricated horizontal section protrudes downward to form a transverse positioning shear key. Both the prefabricated horizontal and vertical sections are provided with prefabricated section embedded channels for steel strands to pass through. By setting shear keys in different areas, the stress performance of the connection points is effectively improved, greatly enhancing the overall load-bearing capacity of the precast beam structure. Simultaneously, the transverse positioning shear key protruding at the bottom of the precast section can reliably engage with the transverse positioning shear key recessed on existing bridges, significantly enhancing the positioning effect of the precast beam during assembly and improving construction accuracy and efficiency. Furthermore, the prestressed steel strands running through the precast section improve the structure's crack resistance, enabling the precast beam to better maintain its integrity after connection, effectively avoiding durability problems caused by cracking at the connection surface, and extending the bridge's service life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of a prefabricated bridge assembly structure according to one embodiment of the present utility model;

[0023] Figure 2 This is a plan view of a prefabricated bridge assembly structure according to one embodiment of the present utility model;

[0024] Figure 3 This is a three-dimensional schematic diagram from another perspective of a bridge prefabrication and assembly structure in one embodiment of the present utility model.

[0025] Figure 4 This is a three-dimensional schematic diagram of an existing bridge in one embodiment of the present invention;

[0026] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0027] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0028] Explanation of icon numbers:

[0029] 10. L-shaped precast structure; 110. Precast horizontal section; 111. Top slab section; 112. Flange section; 120. Precast vertical section; 130. Precast section embedded duct; 131. Precast section longitudinal embedded duct; 132. Precast section vertical embedded duct; 140. Hollow groove; 150. Anchor block; 160. Anchor groove opening; 20. Shear key assembly; 210. Top slab shear key; 220. Web shear key; 230. Bottom slab Shear key; 240, Lateral positioning shear key; 30, Existing bridge; 310, Horizontal section of existing bridge; 320, Vertical section of existing bridge; 330, Pre-embedded duct of existing bridge; 331, Longitudinal pre-embedded duct of existing bridge; 332, Vertical pre-embedded duct of existing bridge; 40, Shear key assembly; 410, Top plate shear key; 420, Web plate shear key; 430, Bottom plate shear key; 440, Lateral positioning shear key. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Please see the appendix Figure 1-5 This utility model provides a bridge prefabricated assembly structure in one embodiment, including an L-shaped prefabricated structure and a shear key assembly. Details are as follows:

[0035] The L-shaped prefabricated structure includes a prefabricated horizontal section and a prefabricated vertical section. The prefabricated vertical section is located at the end of the prefabricated horizontal section away from the existing bridge. The shear key assembly includes multiple top plate shear keys, web plate shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate shear keys protrude from the top end of the connecting side of the prefabricated horizontal section, the web plate shear keys protrude from the connecting side of the prefabricated horizontal section, and the bottom plate shear keys protrude from the connecting side of the prefabricated vertical section. The bottom of the prefabricated horizontal section protrudes downward to form the transverse positioning shear key. Both the prefabricated horizontal and vertical sections are also provided with prefabricated section embedded channels for steel strands to pass through.

[0036] Specifically, in the application embodiment of the suspended arch bridge structure, after the suspended arch bridge section of the existing bridge is removed, the end of the existing bridge will form an L-shaped structure. Therefore, in order to facilitate matching during connection, the L-shaped prefabricated structure is also set in the form of an L-shaped segment. Thus, the L-shaped structure includes a prefabricated horizontal segment and a prefabricated vertical segment. In order to facilitate fitting and assembly with the end of the existing bridge, the prefabricated vertical segment is set at the end of the prefabricated horizontal segment away from the existing bridge. The shear key assembly is used for shear force transmission and pre-positioning on the connection side. It includes multiple top plate shear keys, web plate shear keys, bottom plate shear keys, and transverse positioning shear keys, distributed in different areas on the connection side.

[0037] The top slab shear key is used for pre-positioning and shear force transfer in the top slab area of ​​the L-shaped precast structure. It is located on the top of the connecting side of the precast horizontal section of the L-shaped precast structure (the connecting side refers to the side facing the end of the existing bridge). The web shear key is also used for pre-positioning and shear force transfer in the web area of ​​the L-shaped precast structure. It is also located on the connecting side of the precast horizontal section of the L-shaped precast structure, but not limited to the top slab location; it is also located at other positions on the connecting side of the precast horizontal section to ensure the shear force transfer performance and pre-positioning capability of the web. The bottom slab shear key is used for pre-positioning and shear force transfer in the bottom slab area of ​​the L-shaped precast structure. It is located on the connecting side of the precast vertical section of the L-shaped precast structure. The lateral positioning shear key is used to strengthen the lateral positioning and shear force transmission of the L-shaped prefabricated structure, and therefore it protrudes from the bottom end of the prefabricated horizontal section. This ensures that shear keys are provided in each area to guarantee the load-bearing capacity and ensure the pre-positioning effect during assembly. Furthermore, both the prefabricated horizontal and vertical sections are provided with prefabricated section embedded channels for steel strands to pass through, so that after each shear key is matched and embedded in the corresponding position, it can be connected to the existing bridge through the steel strands. The side of the L-shaped prefabricated structure away from the existing bridge is used to connect with other prefabricated assembly sections, which can be concrete sections or steel structure sections, depending on the specific circumstances.

[0038] In a preferred embodiment of the present invention, the top end of the connecting side of the prefabricated horizontal section includes a top plate section and two flange sections arranged on both sides of the top plate section along the transverse bridge direction. A plurality of top plate shear protrusions are arranged at intervals along the transverse bridge direction, and the top plate section and the flange sections are both provided with the top plate shear protrusions.

[0039] It should be noted that, in order to match the end structure of the existing bridge, the L-shaped prefabricated structure also has a flange plate. In a preferred embodiment of this application, the top end of the connecting side of the prefabricated horizontal section includes a top plate section and a flange section. Therefore, considering that the shear keys in the top plate area are evenly distributed, multiple top plate shear protrusions are arranged at intervals along the transverse direction of the bridge, so that top plate shear protrusions are provided not only in the top plate section but also in the flange section. It is worth mentioning that, considering that the flange section is relatively thin, the width of the top plate shear protrusion of the flange section needs to be set to be smaller than the width of the top plate shear protrusion of the top plate section, so as to make an adaptive setting according to the cross-sectional thickness.

[0040] In a preferred embodiment of this utility model, a plurality of web shear protrusions are arranged vertically at intervals to form a web shear protrusion group. The number of web shear protrusion groups is multiple, and the plurality of web shear protrusion groups are arranged horizontally at intervals on the connecting side of the prefabricated horizontal section.

[0041] It should be noted that, considering the uniform distribution of shear keys in the web section of the entire precast horizontal section, multiple web shear keys are arranged vertically at intervals to form a web shear key group, which is uniformly distributed in the vertical section. At the same time, the web shear key group is also arranged at intervals in the transverse direction to ensure uniform distribution in the transverse width section, thus ensuring good pre-positioning performance and shear force transmission performance. Preferably, the number of web shear key groups is three, with one arranged on each side in the transverse direction and one in the middle. The web shear key groups at both ends are arranged between the top plate shear keys of the flange section and the top plate shear keys of the top plate section. Those skilled in the art can set this according to the cross-sectional width.

[0042] In a preferred embodiment of this utility model, the transverse positioning shear force protrusion is in the shape of a quadrangular prism, and a plurality of the transverse positioning shear force protrusions are arranged at intervals along the transverse bridge direction.

[0043] It is worth noting that the quadrangular prism shape provides better lateral positioning during assembly and connection. By employing multiple lateral positioning shear force protrusions arranged at intervals along the transverse bridge direction to work together, the shear force transmission performance is enhanced.

[0044] In a preferred embodiment of this utility model, a plurality of the base plate shear protrusions are arranged at intervals along the transverse bridge direction, and a transverse positioning shear protrusion is provided between every two adjacent base plate shear protrusions.

[0045] It is worth noting that, similar to other shear keys, the bottom plate shear keys are also arranged at intervals along the transverse bridge direction to ensure a uniform arrangement of the cross-section in the transverse bridge direction. In order to avoid the conflict between the bottom plate shear keys and the transverse positioning shear keys, a transverse positioning shear key is provided between every two adjacent bottom plate shear keys.

[0046] Furthermore, it also includes anchor blocks, and the precast section embedded ducts include precast section longitudinal embedded ducts, wherein the L-shaped precast structure is recessed on the side away from the existing bridge to form hollow grooves arranged opposite each other along the transverse direction of the bridge, and each hollow groove is connected to the anchor blocks at both ends along the transverse direction of the bridge, and each anchor block is provided with the precast section longitudinal embedded ducts.

[0047] It should be understood that the anchor block is used as the anchoring end after the steel strands are arranged. Therefore, the precast section is arranged with longitudinal embedded holes in the anchor block. The connection is carried out by using steel strands in conjunction with prestressed tension to improve the structural connection strength. In order to facilitate the installation of the anchor block, the hollow groove is set on the side of the L-shaped precast structure away from the existing bridge, so that the anchor block is fixedly installed at both ends of the hollow groove along the transverse direction of the bridge, which facilitates the through arrangement of longitudinal steel strands.

[0048] Furthermore, each of the anchor blocks has two pre-embedded longitudinal channels arranged vertically at intervals. The upper pre-embedded longitudinal channel extends into the pre-fabricated horizontal section, and the lower pre-embedded longitudinal channel extends into the pre-fabricated vertical section.

[0049] It should be noted that each anchor block contains two precast longitudinal embedded ducts, which are arranged vertically at intervals to form an upper and lower arrangement. This arrangement can better adapt to the L-shaped structure, allowing the longitudinal steel strands in the upper precast longitudinal embedded ducts to pass through the precast horizontal section, and the longitudinal steel strands in the lower precast longitudinal embedded ducts to pass through the precast vertical section. It is worth mentioning that the lower longitudinal steel strands, in addition to connecting the two segments, also play a role in improving the crack resistance of the existing bridge ends, thereby improving the structural durability.

[0050] Furthermore, the precast section embedded duct also includes a precast section vertical embedded duct. The top of the precast horizontal section near the existing bridge end is provided with multiple anchoring slots along the transverse direction, and each anchoring slot is provided with a precast section vertical embedded duct.

[0051] It should be noted that the prefabricated section vertical embedded holes are used for the vertical steel strands to pass through. The arrangement of the vertical steel strands further enhances the connection between the structural connection sides and improves the shear and crack resistance of the contact surface, thereby extending the service life of the structure. The anchoring slots serve as the anchoring ends after the vertical steel strands pass through. Therefore, each anchoring slot has one prefabricated section vertical embedded hole.

[0052] This application also provides a bridge, including an existing bridge and a shear key assembly. The end of the existing bridge is L-shaped, and the end of the existing bridge includes a horizontal section and a vertical section. The shear key assembly includes multiple top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate shear keys are recessed at the top end of the connecting side of the vertical section of the existing bridge, the web shear keys are recessed on the connecting side of the vertical section of the existing bridge, and the bottom plate shear keys are recessed on the connecting side of the horizontal section of the existing bridge. The top of the existing bridge's horizontal section is recessed downwards to form the transverse positioning shear key, and the end of the existing bridge is also provided with pre-embedded ducts. The structure also includes the bridge prefabrication assembly structure described above, wherein the top plate shear key of the prefabrication assembly structure corresponds to the top plate shear key, the web plate shear key corresponds to the web plate shear key, the bottom plate shear key corresponds to the bottom plate shear key, the transverse positioning shear key corresponds to the transverse positioning shear key, and the prefabricated section pre-embedded duct corresponds to the pre-embedded duct of the existing bridge.

[0053] Understandably, to facilitate compatibility between the existing bridge and the prefabricated bridge structure, the shear key assembly is provided on the end connection side of the existing bridge. Similarly, since the existing bridge is also L-shaped, the composition of the shear key assembly must correspond to that of the shear key assembly. The shear key assembly includes multiple top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate and web shear keys are located on the connection side of the vertical section of the existing bridge, while the bottom plate shear key is located on the connection side of the horizontal section. The transverse positioning shear key is recessed at the top of the existing horizontal section of the bridge; and the shear key in each region is positioned to correspond to the shear key in the longitudinal direction of the bridge, so as to facilitate interlocking and matching. Similarly, the pre-embedded ducts of the existing bridge at the end of the existing bridge are also matched with the pre-embedded ducts of the precast section. Matching here means that the dimensions are the same and the center line is set, so as to facilitate the connection of the steel strands through the two structures. Therefore, the pre-embedded ducts of the existing bridge also include the longitudinal pre-embedded ducts of the existing bridge corresponding to the longitudinal pre-embedded ducts of the precast section, and the vertical pre-embedded ducts of the existing bridge corresponding to the vertical pre-embedded ducts of the precast section.

[0054] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A prefabricated assembly structure for bridges, characterized in that, This includes L-shaped prefabricated structures and shear key components; among which, The L-shaped prefabricated structure includes a prefabricated horizontal section and a prefabricated vertical section. The prefabricated vertical section is located at the end of the prefabricated horizontal section furthest from the existing bridge. The shear key assembly includes multiple top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys. The top plate shear key protrudes from the top end of the connecting side of the precast horizontal section, the web plate shear key protrudes from the connecting side of the precast horizontal section, the bottom plate shear key protrudes from the connecting side of the precast vertical section, and the bottom of the precast horizontal section protrudes downward to form the transverse positioning shear key. Both the precast horizontal section and the precast vertical section are provided with precast section embedded channels for steel strands to pass through.

2. The bridge prefabrication assembly structure according to claim 1, characterized in that, The top end of the connecting side of the prefabricated horizontal section includes a top plate section and two flange sections arranged on both sides of the top plate section along the transverse bridge direction. A plurality of top plate shear protrusions are arranged at intervals along the transverse bridge direction, and the top plate section and the flange sections are both provided with the top plate shear protrusions.

3. The bridge prefabrication and assembly structure according to claim 1, characterized in that, Multiple web shear keys are arranged vertically at intervals to form a web shear key group. The number of web shear key groups is multiple, and the multiple web shear key groups are arranged horizontally at intervals on the connecting side of the precast horizontal section.

4. The bridge prefabrication assembly structure according to claim 1, characterized in that, The transverse positioning shear key is in the shape of a quadrangular prism, and multiple transverse positioning shear keys are arranged at intervals along the transverse bridge direction.

5. The bridge prefabrication and assembly structure according to claim 4, characterized in that, Multiple shear protrusions on the base plate are spaced apart along the transverse bridge direction, and a transverse positioning shear protrusion is provided between every two adjacent shear protrusions on the base plate.

6. The bridge prefabricated assembly structure according to claim 2, characterized in that, The width of the top plate shear key of the flange section is smaller than the width of the top plate shear key of the top plate section.

7. The bridge prefabrication assembly structure according to claim 1, characterized in that, It also includes anchor blocks, and the precast section embedded ducts include precast section longitudinal embedded ducts. The L-shaped precast structure is recessed on the side away from the existing bridge to form hollow grooves that are arranged opposite each other along the transverse direction of the bridge. Each hollow groove is connected to the anchor blocks at both ends along the transverse direction of the bridge, and each anchor block is provided with the precast section longitudinal embedded ducts.

8. The bridge prefabrication assembly structure according to claim 7, characterized in that, Each anchor block has two precast longitudinal embedded holes arranged vertically at intervals. The upper precast longitudinal embedded hole extends into the precast horizontal section, and the lower precast longitudinal embedded hole extends into the precast vertical section.

9. The bridge prefabrication assembly structure according to claim 1, characterized in that, The precast section embedded duct also includes a precast section vertical embedded duct. The top of the precast horizontal section near the existing bridge end is provided with multiple anchoring slots along the transverse direction, and each anchoring slot is provided with a precast section vertical embedded duct.

10. A bridge comprising an existing bridge and a shear key assembly, wherein the end of the existing bridge is L-shaped, the end of the existing bridge comprising a horizontal section and a vertical section, and the shear key assembly comprising a plurality of top plate shear keys, web shear keys, bottom plate shear keys, and transverse positioning shear keys, wherein... The top plate shear key recess is formed at the top end of the connection side of the vertical section of the existing bridge, the web plate shear key recess is formed on the connection side of the vertical section of the existing bridge, and the bottom plate shear key recess is formed on the connection side of the horizontal section of the existing bridge. The top of the horizontal section of the existing bridge is recessed downward to form the transverse positioning shear key. Furthermore, the end of the existing bridge is provided with a pre-embedded channel. The bridge prefabrication assembly structure, as described in any one of claims 1-9, includes a top plate shear key corresponding to the top plate shear key, a web plate shear key corresponding to the web plate shear key, a bottom plate shear key corresponding to the bottom plate shear key, a transverse positioning shear key corresponding to the transverse positioning shear key, and a pre-embedded channel in the prefabricated section corresponding to the pre-embedded channel in the existing bridge.

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