Prefabricated bridge abutment

Abstract

The utility model discloses a prefabricated bridge abutment which comprises a pile foundation, a split mechanism is arranged on the pile foundation, the split mechanism comprises a bearing platform, a rib plate, a back wall, an abutment cap, a lug wall, a long screw rod, a short screw rod and a nut, the bearing platform is installed on the pile foundation, the rib plate is arranged on the bearing platform, the back wall is arranged on the rib plate, the abutment cap is installed on the back wall, and the lug wall is arranged on the back wall. The lug walls are installed at the two ends of the back wall, the long screws are arranged on the lug walls and the back wall, the short screws are arranged on the bearing platform, the splicing mechanism is arranged on the bearing platform and comprises a splicing groove, a splicing seat, a clamping groove, a clamping block, a threaded hole and a bolt, the splicing groove is formed in the bearing platform, the splicing seat is installed in the splicing groove, and the clamping block is installed in the splicing groove. And the clamping groove is formed in the splicing seat, so that the technical problems in the prior art that a plurality of defects exist in the aspects of split part design, splicing operation and damping performance are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of precast abutments, and more specifically, it relates to a precast abutment. Background Art

[0002] In the existing technology, a precast abutment is a bridge foundation structure prefabricated in a factory, which can be assembled on site, thus shortening the construction period and improving the construction efficiency;

[0003] The split-piece design of precast abutments has some significant problems. First of all, these split pieces are often large in size, which brings inconvenience to the transportation process. Due to the oversized split pieces, not only special transportation vehicles and equipment are required, but also the road traffic is easily affected during transportation, increasing the transportation risk and cost. In addition, when large split pieces pass through narrow or busy sections, traffic congestion may be caused, and even temporary traffic control may be required, causing inconvenience to the travel of surrounding residents and commercial activities;

[0004] Secondly, during the splicing process, the operation of precast abutments in the existing technology is complex and laborious. Due to the lack of special splicing parts or splicing mechanisms, the split pieces of precast abutments often need to rely on manual labor and heavy machinery for positioning and splicing during on-site assembly. This splicing method is not only inefficient, but also has high requirements for the physical strength and skills of workers, easily causing construction delays and safety accidents. In addition, the complex splicing process may also lead to low splicing accuracy, affecting the overall quality and service life of the abutment;

[0005] Furthermore, a significant deficiency of precast abutments in the existing technology is the lack of a shock absorption mechanism. During the use of the bridge, due to the influence of vehicle driving, wind force and other dynamic loads, the bridge structure will vibrate. Without effective shock absorption measures, long-term vibration may cause fatigue damage to bridge components, reducing the durability and safety of the bridge. Therefore, the lack of a shock absorption mechanism is an important defect in the existing precast abutment technology, which limits the application of precast abutments in some occasions that require high shock absorption performance. Summary of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] In view of the problems existing in the existing technology, the utility model provides a precast abutment to solve the technical problems of many deficiencies in the split-piece design, splicing operation and shock absorption performance mentioned in the background art.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the present utility model provides the following technical solution: a precast abutment, including a pile foundation, a split mechanism is arranged on the pile foundation, the split mechanism includes a bearing platform, rib plates, a back wall, a coping, wing walls, long screws, short screws and nuts, the bearing platform is installed on the pile foundation, the rib plates are arranged on the bearing platform, the back wall is arranged on the rib plates, the coping is installed on the back wall, the wing walls are installed at both ends of the back wall, the long screws are arranged on the wing walls and the back wall, the short screws are arranged on the bearing platform, a splicing mechanism is arranged on the bearing platform, the splicing mechanism includes a splicing groove, a splicing seat, a clamping groove, a clamping block, a threaded hole and a bolt, the splicing groove is arranged on the bearing platform, the splicing seat is installed in the splicing groove, the clamping groove is arranged on the splicing seat, the clamping block is arranged in the clamping groove, the threaded hole is arranged on the clamping member, and the bolt is arranged in the threaded hole.

[0010] The present utility model is further arranged such that a slot is opened on the bearing platform, the slot is adapted to the bottom surfaces of most rib plates, and the bottom ends of the rib plates are inserted into the slots. The slot on the bearing platform matches the mating groove on the bottom surface of the rib plate, enabling the rib plate to be accurately inserted into the slot on the bearing platform.

[0011] The present utility model is further arranged such that inserting plates are provided in the slots, there are multiple groups of inserting plates, mating grooves are opened on the bottom surfaces of the rib plates, there are multiple groups of mating grooves and they are adapted to the multiple groups of inserting plates. Multiple groups of inserting plates are provided in the slots and are adapted to the mating grooves on the bottom surface of the rib plate for positioning and fixing the rib plate.

[0012] The present utility model is further arranged such that jack holes are opened on both the bearing platform and the rib plates, the short screws are inserted into the jack holes, and nuts are threadedly connected to the top ends of both the long screws and the short screws. This connection method provides additional structural stability, ensures the firm connection between the rib plate and the bearing platform, and facilitates adjustment and fastening during the construction process.

[0013] The present utility model is further arranged such that a pre-embedded rod is provided at the rear side of the splicing seat, and the pre-embedded rod is arranged in the bearing platform. The arrangement of the pre-embedded rod enhances the overall stability of the structure and facilitates subsequent splicing and connection.

[0014] The present utility model is further arranged such that threaded holes are provided at the bottom ends of the clamping grooves and are threadedly connected to the bolts. This connection method ensures the firm connection between the splicing seats and improves the stability and reliability of splicing.

[0015] The present utility model is further configured such that a shock absorption mechanism is provided on the back wall. The shock absorption mechanism includes a through groove, a steel plate, leakage holes, and connection holes. The through groove is provided inside the back wall. Multiple groups of steel plates are installed in the through groove. The leakage holes are provided on the steel plates, and the connection holes are provided on the steel plates. The design of the shock absorption mechanism effectively reduces the vibration of the bridge under earthquakes or other dynamic loads, improving the safety of the bridge. This design not only enhances the safety of the bridge but also facilitates the rapid inspection and replacement of the shock absorption mechanism after an earthquake, reducing the maintenance cost and extending the service life of the bridge.

[0016] The present utility model is further configured such that the long screw is threadedly connected to the ear wall and its middle end penetrates through the connection holes provided on multiple groups of the steel plates. The middle end of the long screw penetrating through the connection holes on the steel plates realizes the firm connection between the back wall and the ear wall, allowing a certain degree of relative displacement to absorb vibration energy.

[0017] (III) Advantageous Effects

[0018] Compared with the prior art, the present utility model provides a precast abutment, having the following advantageous effects:

[0019] 1. The design of the split mechanism enables each component of the precast abutment (such as the pile cap, rib plate, back wall, cap, and ear wall) to be independently manufactured and transported, thus solving the problem of difficult transportation of traditional large-sized split parts. Through the slots and plug plates on the pile cap, and the mating grooves on the bottom surface of the rib plate, the rapid positioning and connection of the rib plate and the pile cap are realized, improving the installation efficiency and accuracy. The setting of the long screws and short screws, as well as the fastening of the nuts, provides a solid support for the entire structure, ensuring the stability and durability of the abutment.

[0020] 2. The splicing mechanism realizes the precise docking and rapid connection between the precast abutment modules through the design of the splicing groove, splicing seat, clamping groove, clamping block, and bolts. The setting of the embedded rods enhances the overall stability of the structure and facilitates the connection with existing infrastructure. The threaded holes at the bottom end of the clamping groove and the bolt connection ensure the firmness of the splicing, while simplifying the splicing process, reducing the operation complexity and labor cost.

[0021] 3. The shock absorption mechanism effectively reduces the vibration of the bridge under earthquakes or other dynamic loads through the design of the through groove, steel plate, leakage holes, and connection holes on the back wall. Multiple groups of steel plates are installed in the through groove. Through the threaded connection between the long screw and the ear wall, the firm connection between the back wall and the ear wall is realized, while allowing a certain degree of relative displacement to absorb vibration energy. This design not only improves the safety of the bridge but also facilitates the rapid inspection and replacement of the shock absorption mechanism after an earthquake, thereby reducing the maintenance cost and extending the service life of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1Schematic diagram of the overall structure of a precast abutment in the present utility model;

[0023] Figure 2 Schematic diagram of the split state of the split mechanism in the present utility model;

[0024] Figure 3 Schematic diagram of the splicing mechanism in the present utility model;

[0025] Figure 4 Schematic diagram of the bearing platform and rib plate in the present utility model;

[0026] Figure 5 Schematic diagram of the steel plate in the present utility model.

[0027] In the figure: 1, pile foundation; 2, bearing platform; 3, rib plate; 4, back wall; 5, abutment cap; 6, wing wall; 7, long screw; 8, short screw; 9, nut; 10, splicing groove; 11, splicing seat; 12, clamping groove; 13, clamping block; 14, threaded hole; 15, slot; 16, inserting plate; 17, adapting groove; 18, inserting hole; 19, embedded rod; 20, through groove; 21, steel plate; 22, leakage hole; 23, connecting hole; 24, bolt. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0029] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0030] In the present utility model, unless otherwise stated, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contours of each component itself, but the above orientation terms are not used to limit the present utility model.

[0031] Please refer to Figures 1-5, A precast abutment, including a pile foundation 1, a split mechanism is arranged on the pile foundation 1. The split mechanism includes a bearing platform 2, rib plates 3, a back wall 4, a coping 5, wing walls 6, long screws 7, short screws 8 and nuts 9. The bearing platform 2 is installed on the pile foundation 1, the rib plates 3 are arranged on the bearing platform 2, the back wall 4 is arranged on the rib plates 3, the coping 5 is installed on the back wall 4, the wing walls 6 are installed at both ends of the back wall 4, the long screws 7 are arranged on the wing walls 6 and the back wall 4, the short screws 8 are arranged on the bearing platform 2, and a splicing mechanism is arranged on the bearing platform 2. The splicing mechanism includes a splicing groove 10, a splicing seat 11, a clamping groove 12, a clamping block 13, a threaded hole 14 and a bolt 24. The splicing groove 10 is arranged on the bearing platform 2, the splicing seat 11 is installed in the splicing groove 10, the clamping groove 12 is arranged on the splicing seat 11, the clamping block 13 is arranged in the clamping groove 12, the threaded hole is arranged on the clamping part, and the bolt 24 is arranged in the threaded hole.

[0032] A slot 15 is formed on the bearing platform 2, and the slot 15 is adapted to the bottom surfaces of most rib plates 3. The bottom ends of the rib plates 3 are inserted into the slot 15. The design of the slot 15 enables the rib plates 3 to be firmly connected to the bearing platform 2, improving the overall stability and load-bearing capacity of the structure. The insertion method of the rib plates 3 simplifies the installation process and improves the construction efficiency.

[0033] Insertion plates 16 are arranged in the slot 15, and multiple groups of insertion plates 16 are provided. Adaptation grooves 17 are formed on the bottom surfaces of the rib plates 3, and multiple groups of adaptation grooves 17 are provided and are adapted to the multiple groups of insertion plates 16. The arrangement of the insertion plates 16 and the adaptation grooves 17 further enhances the connection stability between the rib plates 3 and the bearing platform 2, improving the shear resistance and seismic performance of the structure.

[0034] Insertion holes 18 are formed on both the bearing platform 2 and the rib plates 3, and the short screws 8 are inserted into the insertion holes 18. Nuts 9 are threadedly connected to the tops of both the long screws 7 and the short screws 8. The connection design of the short screws 8 and the long screws 7 enables the rib plates 3 to be fastened by the nuts 9, ensuring the tight connection between the rib plates 3 and the bearing platform 2. This design improves the overall stability and load-bearing capacity of the structure.

[0035] A pre-buried rod 19 is arranged at the rear side of the splicing seat 11, and the pre-buried rod 19 is arranged in the bearing platform 2. The arrangement of the pre-buried rod 19 provides additional support and connection points, enhancing the overall stability and load-bearing capacity of the structure. The design of the pre-buried rod 19 also facilitates subsequent construction and connection work.

[0036] Threaded holes are arranged at the bottom ends of the clamping grooves 12 and are threadedly connected to the bolts 24. The connection design of the clamping grooves 12 and the bolts 24 enables the clamping grooves 12 to be fastened by the bolts 24, ensuring the stability and safety of the clamping grooves 12. This design improves the overall stability and load-bearing capacity of the structure.

[0037] In this embodiment, first, a bearing platform 2 is installed on a pile foundation 1, and a rib plate 3 is connected to the bearing platform 2 through a slot 15 and a plug plate 16. During the connection process, multiple groups of plug plates 16 are inserted into the adaptation slots 17 provided on the rib plate 3 for positioning. A back wall 4 is installed on the rib plate 3 and is firmly connected through a long screw 7, a short screw 8, and a nut 9 system to provide stability. A coping 5 is installed on the back wall 4, and wing walls 6 are installed at both ends of the back wall 4 and are threadedly connected to the wing walls 6 through long screws 7. A splicing mechanism is used to connect multiple precast abutment modules together. During the precasting process of the bearing platform 2, the embedded rod 19 provided at the rear side of the splicing seat 11 is fixed in the bearing platform 2. During the splicing process, two groups of splicing seats 11 are butted, and a clamping member is inserted into the clamping slot 12 to connect the two groups of splicing seats 11. Then, bolts 24 are threadedly screwed into the threaded holes in the clamping member and the clamping slot 12 to splice and fix the two groups of bearing platforms 2.

[0038] Please refer to Figure 5 , as an implementation manner of the shock absorption mechanism: a shock absorption mechanism is provided on the back wall 4. The shock absorption mechanism includes a through slot 20, a steel plate 21, leakage holes 22, and connection holes 23. The through slot 20 is provided in the back wall 4, multiple groups of steel plates 21 are installed in the through slot 20, the leakage holes 22 are provided on the steel plate 21, and the connection holes 23 are provided on the steel plate 21. The design of the shock absorption mechanism enables the back wall 4 to absorb and disperse shock energy through the movement of the steel plate 21 and the deformation of the leakage holes 22 when being vibrated, thereby reducing the influence of vibration on the structure and improving the seismic performance and safety of the structure.

[0039] The long screw 7 is threadedly connected to the wing wall 6 and its middle end penetrates through the connection holes 23 provided on multiple groups of steel plates 21. The connection design of the long screw 7 and the wing wall 6 enables the wing wall 6 to be connected to the back wall 4 through the long screw 7, providing additional support and stability. This design enhances the overall stability and load-bearing capacity of the structure.

[0040] More specifically, a through slot 20 is left during the precasting process of the back wall 4, multiple groups of steel plates 21 are installed in the through slot 20 before splicing and installation, and during the splicing process, the long screw 7 penetrates through the connection holes 23 provided on multiple groups of steel plates 21 to support and fix the multiple groups of steel plates 21. When the abutment is subjected to seismic forces along the longitudinal direction, the seismic forces are consumed through the shock absorption mechanism and the structure of the abutment itself, reducing the displacement in the longitudinal bridge direction; after the earthquake, it is convenient to quickly repair and replace the shock absorption mechanism. The middle end of the long screw 7 penetrates through the connection holes 23 of multiple groups of steel plates 21, realizing the firm connection between the back wall 4 and the wing wall 6, and at the same time allowing a certain degree of relative displacement to absorb shock energy.

[0041] In summary, when the overall equipment is in use or operation: First, install the bearing platform 2 on the pile foundation 1, and connect the rib plate 3 with the bearing platform 2 through the slot 15 and the insertion plate 16. During the connection process, insert multiple groups of insertion plates 16 into the mating slots 17 provided on the rib plate 3 for positioning. Install the back wall 4 on the rib plate 3, and use the long screw 7, short screw 8 and nut 9 system for fastening connection to provide stability. Install the abutment cap 5 on the back wall 4, install the wing walls 6 at both ends of the back wall 4, and connect the wing walls 6 through the threaded connection of the long screw 7. Use the splicing mechanism to connect multiple precast abutment modules together. During the prefabrication of the bearing platform 2, fix the embedded rod 19 provided at the rear of the splicing seat 11 in the bearing platform 2. During the splicing process, dock two groups of splicing seats 11, insert the clamping parts into the clamping grooves 12 to connect the two groups of splicing seats 11, and then thread the bolts 24 into the threaded holes in the clamping parts and the clamping grooves 12 to splice and fix the two groups of bearing platforms 2.

[0042] Leave a through groove 20 during the prefabrication of the back wall 4. Install multiple groups of steel plates 21 in the through groove 20 before the splicing installation. During the splicing process, pass the long screw 7 through the connection holes 23 provided on multiple groups of steel plates 21 to support and fix the multiple groups of steel plates 21. When the abutment is subjected to longitudinal seismic forces, the seismic forces are dissipated through the shock absorption mechanism and the structure of the abutment itself, reducing the displacement in the longitudinal bridge direction; after the earthquake, it is convenient to quickly repair and replace the shock absorption mechanism. The middle end of the long screw 7 passes through the connection holes 23 of multiple groups of steel plates 21, realizing the stable connection between the back wall 4 and the wing wall 6, and at the same time allowing a certain degree of relative displacement to absorb the vibration energy.

[0043] In all the above-mentioned solutions, for the connection between two components, welding, the cooperation of bolts and nuts, bolt or screw connection, or other well-known connection methods can be selected according to the actual situation, which will not be elaborated one by one here. For all the above-mentioned cases involving fixed connection, welding is preferably considered. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated abutment, comprising a pile foundation (1), characterized in that: The pile foundation (1) is provided with a split structure, which comprises a cap (2), a rib plate (3), a back wall (4), a cap (5), an ear wall (6), a long screw (7), a short screw (8) and a nut (9); the cap (2) is mounted on the pile foundation (1); the rib plate (3) is arranged on the cap (2); the back wall (4) is arranged on the rib plate (3); the cap (5) is mounted on the back wall (4); the ear wall (6) is mounted at both ends of the back wall (4); the long screw (7) is arranged on the ear wall (6) and the back wall (4); the short screw (8) The support (2) is provided with a splicing mechanism, the splicing mechanism comprising a splicing groove (10), a splicing seat (11), a clamping groove (12), a clamping block (13), a threaded hole (14) and a bolt (24); the splicing groove (10) is provided on the support (2); the splicing seat (11) is installed in the splicing groove (10); the clamping groove (12) is provided on the splicing seat (11); the clamping block (13) is provided in the clamping groove (12); the threaded hole is provided on the clamping member; and the bolt (24) is provided in the threaded hole.

2. The prefabricated abutment according to claim 1 is characterized in that: The support platform (2) is provided with a slot (15), the slot (15) is matched with the bottom surface of the majority of ribs (3), and the bottom end of the rib (3) is inserted into the slot (15).

3. The prefabricated abutment according to claim 2 is characterized in that: An inserting plate (16) is arranged in the slot (15), and the inserting plates (16) are arranged in multiple groups. The bottom surface of the rib plate (3) is provided with an adapting groove (17), and the adapting groove (17) is arranged in multiple groups and is adapted to the multiple groups of the inserting plates (16).

4. The prefabricated abutment according to claim 1 is characterized in that: The support platform (2) and the rib plate (3) are both provided with an insertion hole (18), the short screw rod (8) is inserted into the insertion hole (18), and the top ends of the long screw rod (7) and the short screw rod (8) are both threadedly connected with nuts (9).

5. The prefabricated abutment according to claim 1 is characterized in that: The rear side of the splicing seat (11) is provided with an embedded rod (19), and the embedded rod (19) is arranged in the support platform (2).

6. The prefabricated abutment according to claim 1 is characterized in that: The bottom ends of the clamping grooves (12) are each provided with a threaded hole which is threadedly connected to the bolts (24).

7. The prefabricated abutment according to claim 1 is characterized in that: The back wall (4) is provided with a shock absorbing mechanism, the shock absorbing mechanism comprising a through groove (20), a steel plate (21), a leakage hole (22) and a connecting hole (23); the through groove (20) is provided in the back wall (4); the steel plate (21) is provided with a plurality of groups of leakage holes installed in the through groove (20); the leakage holes (22) are provided on the steel plate (21); and the connecting hole (23) is provided on the steel plate (21).

8. The prefabricated abutment according to claim 7 is characterized in that: The long screw rod (7) is threadedly connected to the ear wall (6) and the middle end thereof passes through a plurality of connection holes (23) provided on the steel plate (21).

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