Prefabricated bridge pier and construction method thereof

Abstract

The invention relates to the technical field of bridge engineering, and provides a prefabricated assembly type pier and a construction method thereof.The prefabricated assembly type pier comprises a prefabricated pier column assembly which comprises a plurality of first prefabricated pier columns and a plurality of second prefabricated pier columns, and the first prefabricated pier columns and the second prefabricated pier columns are sequentially and alternately arranged in the vertical direction; the pipeline assembly comprises a first pipeline part extending in the vertical direction and a second pipeline part extending in the vertical direction, one of the first pipeline part and the second pipeline part is inserted into the first prefabricated pier column, and the other one of the first pipeline part and the second pipeline part is inserted into the second prefabricated pier column adjacent to the first prefabricated pier column; the outer diameter of the first pipeline part is smaller than the inner diameter of the second pipeline part, at least part of the first pipeline part is inserted into the second pipeline part, and the first pipeline part and the second pipeline part are used for containing filler. According to the technical scheme, the splicing efficiency of the bridge pier is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a prefabricated assembled bridge pier and a construction method thereof. Background Art

[0002] In the field of bridge engineering construction, traditional on-site cast-in-place bridge piers have been unable to meet the needs of modern engineering for efficient, high-quality and green construction due to their disadvantages such as long construction period, great environmental impact on quality and difficulty in ensuring durability.

[0003] In related technologies, the application of prefabricated and assembled bridge piers in domestic bridge construction is gradually increasing. When the height of the prefabricated and assembled bridge piers is high, prestressed tendons are usually used to tension the entire length of the bridge piers for connection. When the pier columns are prefabricated in sections in the factory, vertical channels are reserved on the pier columns. After the pier column segments are hoisted on site and accurately aligned, the prestressed tendons are passed through the vertical channels of the entire pier column, and then the prestressed tendons are tensioned. The huge compressive force generated by the prestress is used to make the pier columns of each section in close contact. However, since one end of the prestressed tendon is located at the bottom of the pier, it is not convenient to tension both ends of the steel bar, which reduces the splicing efficiency of the piers. Summary of the Invention

[0004] The problem solved by the present invention is how to improve the splicing efficiency of bridge piers.

[0005] In order to solve the above problems, the present invention provides a prefabricated assembled bridge pier and a construction method thereof.

[0006] In a first aspect, the present invention provides a prefabricated and assembled bridge pier and a construction method thereof, comprising: a prefabricated pier column assembly, comprising a plurality of first prefabricated pier columns and a plurality of second prefabricated pier columns, the plurality of first prefabricated pier columns and the plurality of second prefabricated pier columns being alternately arranged in sequence along a vertical direction; a pipe assembly, comprising a first pipe member extending along the vertical direction and a second pipe member extending along the vertical direction, one of the first pipe member and the second pipe member being inserted into the first prefabricated pier column, the other of the first pipe member and the second pipe member being inserted into the second prefabricated pier column adjacent to the first prefabricated pier column, the outer diameter of the first pipe member being smaller than the inner diameter of the second pipe member, at least a portion of the first pipe member being inserted into the second pipe member, and the first pipe member and the second pipe member being used to accommodate filler.

[0007] Optionally, a difference between an outer diameter of the first pipe member and an inner diameter of the second pipe member is D, and 25 mm ≤ D ≤ 50 mm.

[0008] Optionally, the pipe assembly further includes: a third pipe member, inserted into at least one of the first prefabricated pier and the adjacent second prefabricated pier, one end of the third pipe member being connected to the first pipe member or the second pipe member, and the other end of the third pipe member being located outside the prefabricated pier assembly, and the third pipe member assembly being configured to transport the filling material into the first pipe member or the second pipe member.

[0009] Optionally, a reinforcement member is disposed on the outer peripheral wall of the first pipe member and / or the outer peripheral wall of the second pipe member, and the reinforcement member is disposed around the circumference of the first pipe member and / or the second pipe member.

[0010] Optionally, a through hole is provided on an outer peripheral wall of the first pipe member, and the through hole is configured to connect the first pipe member with the second pipe member.

[0011] Optionally, the prefabricated and assembled bridge pier and the construction method thereof further include embedded parts, which are vertically inserted into the first prefabricated pier column or the second prefabricated pier column and located inside the first pipe member and the second pipe member.

[0012] Optionally, one of a raised portion and a recessed portion is provided at one end of the first prefabricated pier column close to the adjacent second prefabricated pier column, and the other of a raised portion and a recessed portion is provided at one end of the second prefabricated pier column close to the adjacent first prefabricated pier column, the raised portion is inserted into the recessed portion, and both the raised portion and the recessed portion are arranged to avoid the first pipe member and the second pipe member.

[0013] Optionally, an epoxy resin layer is provided on the surfaces of the raised portion and the recessed portion.

[0014] Optionally, the cross-section of the protrusion in the vertical direction is trapezoidal.

[0015] In a second aspect, the present invention provides a construction method, comprising prefabricating a plurality of first prefabricated piers and a plurality of second prefabricated piers, and pre-assembling the plurality of first prefabricated piers and the plurality of second prefabricated piers; Applying epoxy resin glue between the first prefabricated pier and the adjacent second prefabricated pier, and splicing a plurality of the first prefabricated piers and a plurality of the second prefabricated piers to form a prefabricated pier assembly; splicing the lower end of the prefabricated pier column assembly with the receiving platform; Grouting of the third pipeline.

[0016] The beneficial effects of the prefabricated and assembled bridge pier and the construction method thereof of the present invention are: By setting up the above structure, it is only necessary to arrange the first and second prefabricated pier columns alternately in the vertical direction, and directly assemble them by utilizing the insertion relationship of the first and second pipe members. Compared with the traditional prestressed tendon tensioning connection technology, this greatly simplifies the construction process. In the traditional technology, multiple processes such as threading and tensioning are time-consuming. However, this solution does not require complex threading and tensioning operations, and uses the first and second pipe members to replace the prestressed tendons in the traditional solution, which can reduce construction steps, greatly shorten the construction period, and significantly improve construction efficiency, thereby completing the assembly of the bridge piers more quickly, thereby improving the assembly efficiency of the bridge piers. In addition, the first pipe member is inserted into the second pipe member, and the two are used to accommodate the filler. After the filler solidifies, a tight and stable connection is formed between the first and second pipe members. This connection method can effectively transfer the load between the piers and ensure the reliability of the connection between each pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a prefabricated assembled bridge pier provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of a first prefabricated pier provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a second prefabricated pier provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a second prefabricated pier provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a first pipeline member provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a second pipe member provided in an embodiment of the present invention; Figure 7 A schematic flow chart of a construction method provided in an embodiment of the present invention.

[0018] Description of reference numerals: Prefabricated pier assembly 10, first prefabricated pier 11, second prefabricated pier 12, Pipe assembly 20, first pipe member 21, second pipe member 22, third pipe member 23, Reinforcement member 30 , through hole 40 , embedded part 50 , protrusion 60 , recess 70 , receiving platform 80 , vertical direction Z. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up-down position, with the positive direction of the Z-axis representing the up direction and the negative direction of the Z-axis representing the down direction. It should also be noted that the aforementioned Z-axis is merely for the purpose of facilitating and simplifying the description of the present invention, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be construed as limiting the present invention.

[0021] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0022] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0023] like Figures 1 to 7As shown, the present invention provides a prefabricated and assembled bridge pier and a construction method thereof, including: a prefabricated pier column assembly 10, including a plurality of first prefabricated pier columns 11 and a plurality of second prefabricated pier columns 12, the plurality of first prefabricated pier columns 11 and the plurality of second prefabricated pier columns 12 being alternately arranged in sequence along the vertical direction; a pipe assembly 20, including a first pipe member 21 extending along the vertical direction and a second pipe member 22 extending along the vertical direction, one of the first pipe member 21 and the second pipe member 22 being inserted into the first prefabricated pier column 11, and the other of the first pipe member 21 and the second pipe member 22 being inserted into the second prefabricated pier column 12 adjacent to the first prefabricated pier column 11, the outer diameter of the first pipe member 21 being smaller than the inner diameter of the second pipe member 22, at least a portion of the first pipe member 21 being inserted into the second pipe member 22, and the first pipe member 21 and the second pipe member 22 being used to accommodate filler.

[0024] In this embodiment, by setting up the above-mentioned structure, only the first prefabricated pier column 11 and the second prefabricated pier column 12 need to be arranged alternately in the vertical direction, and the first pipe member 21 and the second pipe member 22 are inserted into each other to directly assemble them. Compared with the traditional prestressed tendon tensioning connection technology, this greatly simplifies the construction process. In traditional technology, multiple processes such as stranding and tensioning are time-consuming. In contrast, this solution does not require complex stranding and tensioning operations. The first pipe member 21 and the second pipe member 22 replace the prestressed tendons in the traditional solution, which can reduce construction steps, significantly shorten the construction period, and significantly improve construction efficiency, thereby completing the assembly of the bridge pier faster and improving the efficiency of the bridge pier assembly. In addition, the first pipe member 21 is inserted into the second pipe member 22, and the two are used to contain the filler. After the filler solidifies, the first pipe member 21 and the second pipe member 22 form a tight and stable connection. This connection method can effectively transfer the load between the pier columns and ensure the reliability of the connection between the pier columns.

[0025] In this embodiment, the first pipe member 21 is inserted into the first prefabricated pier 11 , and the second pipe member 22 is inserted into the second prefabricated pier 12 .

[0026] In this embodiment, both the first and second pipe members 21, 22 are steel pipes. Due to their high strength and inherent structural stability, steel pipes can effectively bear the vertical and horizontal forces transmitted by the pier columns. When the first steel pipe is inserted into the second steel pipe and filled with filler, the steel pipes and filler significantly enhance the overall load-bearing capacity of the connection, thereby ensuring structural stability.

[0027] In this embodiment, the filler is a high-strength grouting material or ultra-high-performance concrete. These materials form a high-strength composite load-bearing system with the steel pipe. Once hardened, the filler adheres tightly to the steel pipe wall, effectively transferring the forces between the piers and ensuring structural stability.

[0028] Optionally, a difference between an outer diameter of the first pipe member 21 and an inner diameter of the second pipe member 22 is D, and 25 mm ≤ D ≤ 50 mm.

[0029] In this embodiment, a gap of more than 25 mm can provide sufficient flow channels for high-strength grouting materials or ultra-high performance concrete, ensuring that the filling material can smoothly fill the gaps in the pipes. A gap of less than 50 mm can control the amount of filling material used. While ensuring dense filling, it can avoid increased material consumption due to excessive space. At the same time, it can also reduce the probability of voids between the filling material and the steel pipe wall. At the same time, a gap of 25 mm to 50 mm also provides a fault-tolerant space for the hoisting and positioning of the pier column, which can accommodate slight displacements caused by measurement deviations and hoisting shaking during construction, and avoid difficulties in plugging in or deformation of the pipe due to collision due to too small a gap. In this embodiment, the difference between the outer diameter of the first pipe member 21 and the inner diameter of the second pipe member 22 can be selected to be 25 mm, 40 mm or 50 mm.

[0030] Optionally, the pipe assembly 20 also includes: a third pipe member 23, which is inserted into at least one of the first prefabricated pier 11 and the adjacent second prefabricated pier 12, one end of the third pipe member 23 is connected to the first pipe member 21 or the second pipe member 22, and the other end of the third pipe member 23 is located outside the prefabricated pier assembly 10, and the third pipe member 23 assembly is configured to transport filler into the first pipe member 21 or the second pipe member 22.

[0031] By setting up the above structure, one end of the third pipe member 23 is connected to the gap of the first pipe member 21 or the second pipe member 22, and the other end extends to the outside of the prefabricated pier assembly 10, providing a conveying channel for the filling material, ensuring that the filling material is accurately injected into the plug-in gap of the first and second pipe members 22 to reduce material waste. At the same time, the external port of the third pipe member 23 is preset on the side of the prefabricated pier, which is convenient for operation and makes it possible for the filling material pouring operation to be carried out in a high-altitude area. The operator can complete the grouting through the external port on a relatively safe platform, reducing the risk of high-altitude operations. In this embodiment, the third pipe member 23 is communicated with the first pipe member 21 .

[0032] In this embodiment, the third pipe member 23 is a steel pipe. Steel pipes offer high strength and rigidity. As a conveying channel for the filler, they can withstand the pressure during injection, preventing pipe rupture and deformation due to excessive pressure, and ensuring stable delivery of the filler along the predetermined path. Furthermore, the third steel pipe can be connected to the first and second steel pipes via welding, flange connections, or other methods, ensuring a tight seal and structural strength at the joints, and preventing joint separation or leakage due to excessive filler pressure.

[0033] Optionally, a reinforcement member 30 is disposed around the outer peripheral wall of the first pipe member 21 and / or the outer peripheral wall of the second pipe member 22 , and the reinforcement member 30 is disposed around the circumference of the first pipe member 21 and / or the second pipe member 22 .

[0034] By setting up the above structure, the circumferentially surrounding reinforcement 30 can form an outward convex structure on the outer periphery of the pipe. When the pier is subjected to vertical load or horizontal force, it can effectively resist the relative slippage between the pipe and the filler, thereby significantly improving the stability of the pier during use. At the same time, the reinforcement 30 can expand the contact area between the pipe and the concrete, so that the load transmitted by the pipe can be more evenly distributed to the surrounding filler, reducing local cracking of the pier due to stress concentration and protecting the integrity of the prefabricated pier structure.

[0035] In this embodiment, a reinforcement member 30 is disposed around the outer peripheral wall of the first pipe member 21 and the outer peripheral wall of the second pipe member 22 .

[0036] In this embodiment, the reinforcement 30 is specifically a steel bar, which can be processed into a circumferential structure such as a ring or spiral. The dimensional accuracy is easy to control and the specifications can be flexibly adjusted, which not only improves production efficiency but also reduces production costs.

[0037] Optionally, a through hole 40 is provided on the outer peripheral wall of the first pipe member 21 , and the through hole 40 is configured to connect the first pipe member 21 with the second pipe member 22 .

[0038] By providing this structure, through-holes 40 allow the filler to flow through the openings from the interior of the first conduit member 21 into the second conduit, ensuring a more even distribution of the filler. Furthermore, during the pouring process, as the filler is pushed axially along the conduit under pressure, flow resistance can easily create a pressure difference between the front and rear sections, resulting in less dense filling of the second conduit. Through-holes 40 balance the pressure in different areas, ensuring that the filler fills the second conduit.

[0039] Optionally, the prefabricated and assembled bridge pier and the construction method thereof further include an embedded part 50 , which is vertically inserted into the first prefabricated pier column 11 or the second prefabricated pier column 12 and located inside the first pipe member 21 and the second pipe member 22 .

[0040] By setting up the above structure, after the filler hardens, the embedded part 50 and the filler form a composite structure. The embedded part 50 is tightly combined with the inner walls of the first and second pipe members 22 and the filler. The embedded part 50 can diffuse the concentrated stress to the surrounding filler and pipe wall, avoiding the filler from cracking due to local stress exceeding the ultimate strength, which is beneficial to extending the service life of the pier.

[0041] Optionally, one of the raised portion 60 and the recessed portion 70 is provided at one end of the first prefabricated pier 11 close to the adjacent second prefabricated pier, and the other of the raised portion 60 and the recessed portion 70 is provided at one end of the second prefabricated pier 12 close to the adjacent first prefabricated pier 11, the raised portion 60 is inserted into the recessed portion 70, and both the raised portion 60 and the recessed portion 70 are arranged to avoid the first pipe member 21 and the second pipe member 22.

[0042] By setting up the above structure, during the assembly process, the raised portion 60 can be used as a guide structure and directly inserted into the corresponding recessed portion 70, so that the first prefabricated pier 11 and the second prefabricated pier 12 can be initially aligned without adjustment, thereby achieving rapid and accurate positioning of the first prefabricated pier 11 and the second prefabricated pier 12, effectively reducing the difficulty of alignment caused by manual positioning deviation, greatly improving the splicing efficiency of the first prefabricated pier 11 and the second prefabricated pier 12, and saving time for the subsequent installation of prestressed components. Secondly, the plug-in fit of the raised portion 60 and the recessed portion 70 can also enhance the overall stress-bearing performance of the splicing interface. Since the plug-in structure causes the first prefabricated pier 11 and the second prefabricated pier 12 to form mutual constraints in the horizontal direction, it can effectively resist horizontal loads, reduce the relative displacement between the first prefabricated pier 11 and the second prefabricated pier 12, and improve the bearing capacity and anti-deformation ability of the pier structure. In addition, the plug-in fit of the raised portion 60 and the recessed portion 70 can also improve the sealing performance of the joint interface between the first prefabricated pier column 11 and the second prefabricated pier column 12, thereby better ensuring the durability of the bridge pier. In this embodiment, a recessed portion 70 is provided at one end of the first prefabricated column 11 close to the second prefabricated column 12 , and a raised portion 60 is provided at one end of the second prefabricated column 12 close to the first prefabricated column 11 .

[0043] Optionally, an epoxy resin layer is provided on the surfaces of the protrusion 60 and the recessed portion 70 .

[0044] By configuring the above structure and utilizing the fluidity and plasticity of the epoxy resin adhesive layer, the adhesive layer is squeezed and filled into the gap between the protrusion 60 and the recess 70 during insertion. The adhesive layer can fill the slight gap caused by dimensional deviations between the two by its own flow, allowing the protrusion 60 and the recess 70 to fit more closely together. Furthermore, the adhesive layer provides a buffer and adjustment space for slight positional deviations between the protrusion 60 and the recess 70 before curing, reducing stress concentration caused by the rigid contact between the protrusion 60 and the recess 70 and alleviating installation difficulties caused by errors. Furthermore, the epoxy resin adhesive layer effectively blocks external moisture, dust, corrosive media, and the like from entering the joint interface. This not only prevents impurities from corroding the prestressed components and pier column concrete, thus protecting the durability of the structure, but also prevents rainwater and other substances from seeping into the pier through the joint interface and affecting the overall structural stability.

[0045] Optionally, the cross section of the protrusion 60 in the vertical direction is trapezoidal.

[0046] By setting up the above structure, the trapezoidal bevel can play a guiding role during the insertion of the protrusion 60 into the recess 70. Even if there is a slight deviation in the initial alignment of the first prefabricated pier 11 and the second prefabricated pier 12, the bevel of the protrusion 60 can contact the inner wall of the recess 70 and generate lateral force, gradually correcting the position of the piers and allowing the protrusion 60 to slide smoothly into the recess 70, thereby improving the accuracy and efficiency of the installation of the two. In addition, the two bevels of the trapezoid can more evenly transfer horizontal loads to the corresponding contact surfaces of the recess 70, thereby avoiding stress concentration in local areas and enhancing the shear resistance and overall stability of the splicing area. In other embodiments, the cross-section of the protrusion 60 in the vertical direction may also be configured as a square or rectangular structure, and the specific configuration should be selected according to the use environment of the device.

[0047] Optionally, it further includes: a receiving platform 80, which is provided below the prefabricated pier column assembly 10, and the receiving platform 80 is connected to one end of the prefabricated pier column assembly 10.

[0048] By installing this structure, the receiving platform 80 provides a stable support platform for the lowest pier column, evenly distributing the vertical load transmitted by the pier column. This prevents concentrated load from causing excessive localized pressure on the foundation, effectively protecting the integrity of the foundation structure and ensuring the overall stability of the pier. Furthermore, the installation of the receiving platform 80 provides additional protection for the lowest pier column, preventing the base of the pier column from erosion by rainwater and debris, further extending the service life of the pier.

[0049] In a second aspect, the present invention provides a construction method, comprising: S1: prefabricate a plurality of first prefabricated pier columns 11 and a plurality of second prefabricated pier columns 12, and pre-assemble the plurality of first prefabricated pier columns 11 and the plurality of second prefabricated pier columns 12; S2: applying epoxy resin glue between the first prefabricated pier 11 and the adjacent second prefabricated pier 12, and splicing a plurality of the first prefabricated piers 11 and a plurality of the second prefabricated piers 12 to form a prefabricated pier assembly 10; S3: splicing the lower end of the prefabricated pier assembly 10 with the receiving platform 80; S4: Grouting is performed on the third pipe member 23 .

[0050] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A prefabricated assembled bridge pier, characterized in that: include: A prefabricated pier column assembly (10) comprises a plurality of first prefabricated pier columns (11) and a plurality of second prefabricated pier columns (12), wherein the plurality of first prefabricated pier columns (11) and the plurality of second prefabricated pier columns (12) are alternately arranged in sequence along a vertical direction; A pipe assembly (20) comprises a first pipe member (21) extending in a vertical direction and a second pipe member (22) extending in a vertical direction, wherein one of the first pipe member (21) and the second pipe member (22) is inserted into the first prefabricated pier (11), and the other of the first pipe member (21) and the second pipe member (22) is inserted into the second prefabricated pier (12) adjacent to the first prefabricated pier (11), the outer diameter of the first pipe member (21) is smaller than the inner diameter of the second pipe member (22), at least a portion of the first pipe member (21) is inserted into the second pipe member (22), and the first pipe member (21) and the second pipe member (22) are used to accommodate filling material.

2. The prefabricated and assembled bridge pier according to claim 1, characterized in that: The difference between the outer diameter of the first pipe member (21) and the inner diameter of the second pipe member (22) is D, and 25 mm ≤ D ≤ 50 mm.

3. The prefabricated and assembled bridge pier according to claim 1, characterized in that: The pipeline assembly (20) further includes: A third pipe member (23) is inserted into at least one of the first prefabricated pier (11) and the adjacent second prefabricated pier (12), one end of the third pipe member (23) is connected to the first pipe member (21) or the second pipe member (22), and the other end of the third pipe member (23) is located outside the prefabricated pier assembly (10), and the third pipe member (23) assembly is configured to transport the filling material into the first pipe member (21) or the second pipe member (22).

4. The prefabricated and assembled bridge pier according to claim 1, characterized in that: A reinforcement member (30) is disposed around the outer peripheral wall of the first pipe member (21) and / or the outer peripheral wall of the second pipe member (22), and the reinforcement member (30) is disposed around the circumference of the first pipe member (21) and / or the second pipe member (22).

5. The prefabricated and assembled bridge pier according to claim 1, characterized in that: A through hole (40) is provided on the outer peripheral wall of the first pipe member (21), and the through hole (40) is configured to connect the first pipe member (21) and the second pipe member (22).

6. The prefabricated and assembled bridge pier according to claim 1, characterized in that: The prefabricated assembled bridge pier further includes an embedded part (50), which is inserted into the first prefabricated pier column (11) or the second prefabricated pier column (12) in a vertical direction and is located inside the first pipe member (21) and the second pipe member (22).

7. The prefabricated and assembled bridge pier according to claim 1, characterized in that: One of a raised portion (60) and a recessed portion (70) is provided at one end of the first prefabricated pier (11) close to the adjacent second prefabricated pier, and the other of the raised portion (60) and the recessed portion (70) is provided at one end of the second prefabricated pier (12) close to the adjacent first prefabricated pier (11), the raised portion (60) is inserted into the recessed portion (70), and both the raised portion (60) and the recessed portion (70) are arranged to avoid the first pipe member (21) and the second pipe member (22).

8. The prefabricated and assembled bridge pier according to claim 7, characterized in that: An epoxy resin adhesive layer is provided on the surfaces of the raised portion (60) and the recessed portion (70).

9. The prefabricated and assembled bridge pier according to claim 7, characterized in that: The cross section of the raised portion (60) in the vertical direction is trapezoidal.

10. A construction method for prefabricated assembled bridge piers, characterized in that: include: Prefabricating a plurality of first prefabricated pier columns (11) and a plurality of second prefabricated pier columns (12), and pre-assembling the plurality of first prefabricated pier columns (11) and the plurality of second prefabricated pier columns (12); Applying epoxy resin glue between the first prefabricated pier (11) and the adjacent second prefabricated pier (12), and splicing a plurality of the first prefabricated piers (11) and a plurality of the second prefabricated piers (12) to form a prefabricated pier assembly (10); splicing the lower end of the prefabricated pier column assembly (10) with the receiving platform (80); The third pipe member (23) is grouted.

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