A construction method for connecting a ground beam to a fabricated pier column

Abstract

The application provides an assembled pier column ground tie beam connecting construction method, which comprises the following steps: pouring cushion layers on opposite surfaces of two side pile foundations, extending the two side cushion layers towards each other and installing a sleeper beam at the end of the two side cushion layers away from the pile foundations, and hoisting a prefabricated ground tie beam to the middle position of the two pile foundations. Compared with the traditional technical solution, the method has the advantages that the weight of the prefabricated ground tie beam during assembly is greatly reduced, transportation and hoisting are facilitated, the method is suitable for popularization and application in mountainous areas and areas with poor traffic, the connecting support not only reduces the weight of the prefabricated ground tie beam, but also improves the connecting mode among the pile foundation, the prefabricated ground tie beam and the prefabricated pier column, the upper and lower stress between the pile foundation and the prefabricated pier column is reliable, the special structure of the tie beam steel bar and the construction mode make the connection between the prefabricated ground tie beam and the pile foundation and the prefabricated pier column more close, the exposed steel bars are connected through the winding steel bars of the spiral structure, the shear resistance is increased, and the shear resistance and the anti-seismic performance of the prefabricated ground tie beam are stably improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a method for connecting the ground beam of a prefabricated pier column. Background Technology

[0002] Each bridge pier uses pile foundations, with two pier columns per span. A tie beam is installed between the two pier columns. The tie beam is a structure that improves the stress on the columns and piles, and strengthens the overall rigidity of the piles or piers. The tie beam located at the middle height of the pier column is called the middle tie beam, and the tie beam located at the lower end of the pier column and covered by backfill soil is called the ground tie beam.

[0003] Currently, there are two main construction methods for ground system beams: one is the traditional cast-in-place method, which mainly involves manually tying reinforcing bars and pouring concrete on-site. This method offers high safety and good overall integrity, but requires the erection of numerous support structures and wet-joint shells at each stage of construction, making it difficult to control the appearance quality and resulting in a long construction period, significantly impacting urban traffic. The other method is precast assembled piers, where concrete beams, slabs, and columns are cast and manufactured in a factory and then transported to the construction site for assembly. This method offers fast construction speed and aesthetically pleasing appearance, but the connection between the ground system beam and the pier presents challenges, as existing precast ground system beams are entirely made of concrete. After the soil is poured and shaped, its transportation is too heavy, requiring unconventional large-scale equipment for lifting, which increases the construction difficulty and the requirements for site hardening, thus driving up the overall construction cost. In mountainous areas with poor transportation conditions, the difficulty in transporting large components and bringing in large equipment also limits the application of precast assembled ground beams in mountain bridges. Furthermore, the connection between the precast ground beams and the piers is usually achieved by methods such as pressure bonding, resulting in poor shear resistance and weak seismic resistance of the connection section. The overall performance after assembly is inferior to that of on-site pouring construction. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for connecting the ground beam of prefabricated piers, which solves the problems of existing prefabricated pier ground beams having large self-weight, which leads to difficulties in loading, unloading and assembly, resulting in limited applicable scenarios and weak shear resistance and seismic performance after connection and assembly.

[0005] The embodiments of the present invention are achieved through the following technical solution: a construction method for connecting the ground beam of a prefabricated pier column, comprising the following steps:

[0006] S1. A cushion layer is poured on the opposite side of the pile foundations on both sides. The cushion layers on both sides extend towards each other and a sleeper beam is installed at the end away from the pile foundation.

[0007] S2. The precast ground tie beam is hoisted to the middle position of the two pile foundations, and the two ends of the precast ground tie beam are respectively erected above the sleeper beam. The precast ground tie beam has tie beam reinforcement poured inside it along its length. The tie beam reinforcement consists of long tie beam reinforcement distributed in U shape and short tie beam reinforcement laid flat. The long tie beam reinforcement extends to the top of the pile foundation.

[0008] S3. At the upper notch position corresponding to the U-shaped distribution of the long tie beam reinforcement, install the connecting bracket from top to bottom. The connecting bracket consists of several vertical bars, horizontal bars and diagonal bars.

[0009] S4. Hoist the precast pier column to the top of the connecting bracket. The precast pier column has a through hole in the middle so that the installation grooves opened on the top surface of the pile foundation and the bottom surface of the precast pier column can be matched and engaged with the two ends of the vertical rod to complete the installation of the connecting bracket.

[0010] S5. The length of the short tie beam is extended by the tie beam extension bar and the threaded sleeve II, so that the end of the short tie beam bar also extends to the top of the pile foundation. During this process, the tie beam extension bar and the connecting support are misaligned.

[0011] S6. Multiple circumferential bars are set inside the pile foundation and precast pier according to the reinforcement design requirements of the pier. Multiple embedded steel bars are also set at equal intervals around the circumferential bars and welded to the circumferential bars. The embedded steel bars are arranged vertically and their upper ends extend upward and are connected to threaded sleeves. Two threaded sleeves are connected by exposed steel bars. Wrapped steel bars are arranged outside the exposed steel bars. The wrapped steel bars have a spiral structure. Multiple through holes are evenly spaced from top to bottom on the vertical bar. The wrapped steel bars pass through multiple through holes from top to bottom and are welded and fixed to the exposed steel bars.

[0012] S7. A wet-joint shell is installed outside the connecting bracket. The wet-joint shell completely seals the cavity between the pile foundation, the precast pier, and the precast ground beam. Then, concrete is poured down through the through hole in the middle of the precast pier to fill the cavity. After the concrete has solidified, the wet-joint shell is removed to complete the construction of the ground beam of the precast pier.

[0013] Furthermore, in step S1, the horizontal height of the bolster beam is higher than the base ground line.

[0014] Furthermore, in step S2, the cross-sections at both ends of the precast ground beam are rectangular, while the cross-section in the middle of the precast ground beam is I-shaped.

[0015] Furthermore, in step S3, adjacent vertical bars are fixed together by welding with horizontal bars, and two diagonal bars are intersecting between two mirror-symmetrical vertical bars, with the two diagonal bars arranged in an X-shaped structure.

[0016] Furthermore, based on the difference in diameter between the pile foundation and the precast pier, the connecting support has a structure that gradually narrows from bottom to top.

[0017] Furthermore, horizontal bars are provided at both the upper and lower ends of the vertical pole.

[0018] Furthermore, in step S3, the vertical bar is an I-beam.

[0019] Furthermore, in step S5, among the short tie beams arranged in a flat pattern, several short tie beams are first welded with extension bars, and then connected to the tie beam extension bars and threaded sleeves 2 through the extension bars. The remaining short tie beams are directly connected to the tie beam extension bars and threaded sleeves 2. The two configurations of short tie beams are arranged alternately. The same connection method is also applicable to the connection between exposed and embedded steel bars in step S6.

[0020] Furthermore, in step S6, the embedded reinforcing bars are distributed in two concentric rings, one inside and one outside, and the corresponding exposed reinforcing bars and spiral reinforcing bars are also distributed in two concentric rings.

[0021] Furthermore, in step S7, multiple screws are arranged radially at equal angles on the connecting bracket. When installing the wet joint shell, the screws pass through the wet joint shell. After the wet joint shell is tightly attached to the surface of the pile foundation, precast pier, and precast ground beam, nuts are used to connect with the screws and finally lock the wet joint shell.

[0022] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0023] Compared to traditional technical solutions, this method has the advantage of significantly reducing the weight of the precast ground tie beam during assembly, facilitating transportation and hoisting, and making it easier to promote and apply in mountainous areas and areas with inconvenient transportation. While reducing the weight of the precast ground tie beam, the connecting bracket also improves the connection between the pile foundation, the precast ground tie beam, and the precast pier. The upper and lower forces between the pile foundation and the precast pier are reliable. The special structure and construction method of the tie beam reinforcement also make the connection between the precast ground tie beam and the pile foundation and the precast pier more compact. Furthermore, the exposed reinforcement is connected by a spiral structure of wound reinforcement, which further increases the shear resistance, so that the shear resistance and seismic performance of the precast ground tie beam are steadily improved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A construction flowchart for a prefabricated pier column ground beam connection construction method provided by the present invention;

[0026] Figure 2 This is a front view of the single-sided pile foundation, cushion layer, and sleeper beam in this invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the pile foundation in this invention;

[0028] Figure 4 This is a front view of the precast ground beam erected above the pile foundation in this invention;

[0029] Figure 5 for Figure 4 Cross-sectional view of the precast ground tie beam at point AA;

[0030] Figure 6 for Figure 4 Cross-sectional view of the precast ground tie beam at BB;

[0031] Figure 7 for Figure 4 Reinforcement cross-section of the precast ground beam at point AA;

[0032] Figure 8 for Figure 4 A cross-sectional view of the reinforcing bars at the end of the precast ground beam adjacent to the pile foundation;

[0033] Figure 9 This is a front view of the connecting bracket connecting the supporting pile foundation and the precast pier column in this invention;

[0034] Figure 10 for Figure 9 Top view;

[0035] Figure 11 This is a three-dimensional structural diagram of the connecting bracket in this invention;

[0036] Figure 12 This is a front view of the exposed reinforcing bars and the wrapped reinforcing bars installed outside the connecting bracket in this invention;

[0037] Figure 13 This is a front view of the wet-bonding shell installed outside the connecting bracket in this invention;

[0038] Icons: 1. Pile foundation; 11. Cushion layer; 12. Pillar beam; 2. Embedded reinforcing bar; 21. Threaded sleeve one; 3. Installation groove; 4. Precast ground tie beam; 41. Tie beam reinforcement; 411. Long tie beam reinforcement; 412. Short tie beam reinforcement; 42. Tie beam extension reinforcement; 43. Threaded sleeve two; 5. Connecting bracket; 51. Vertical bar; 511. Through hole; 52. Horizontal bar; 53. Diagonal bar; 54. Exposed reinforcing bar; 55. Wrapped reinforcing bar; 6. Precast pier column; 7. Wet splice shell. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] like Figure 1 As shown, a construction method for connecting the ground tie beam of a prefabricated pier column requires confirming the distance between two pile foundations 1 before use. Based on the known distance, the length of the prefabricated ground tie beam 4 is determined in the prefabrication yard. The construction method includes the following steps:

[0042] S1. After determining the location of pile foundation 1, pour the concrete for pile foundation 1 and excavate the foundation downwards. Then, pour the cushion layer 11 on the opposite sides of the two pile foundations 1, as follows: Figure 2 As shown, the cushion layers 11 on both sides extend towards each other. The figure only shows one side of the pile foundation 1, i.e. Figure 2 The cushion layer 11 extends to the right, while the cushion layer 11 at the corresponding pile foundation 1 on the other side extends to the left. Both cushion layers 11 have a sleeper beam 12 installed at the end away from the pile foundation 1. The top surface of the sleeper beam 12 and the cushion layer 11 are on the same horizontal plane, and the thickness of the sleeper beam 12 is higher than that of the cushion layer 11. At the same time, during construction, the horizontal height of the sleeper beam 12 and the cushion layer 11 is ensured to be higher than the ground line of the foundation.

[0043] S2. Hoist the precast ground beam 4 to the middle position between the two pile foundations 1, ensuring that both ends of the precast ground beam 4 are positioned above the pile foundations 1 on both sides, as follows. Figure 4 As shown, the precast ground beam 4 is gradually lowered by a crane, so that both ends of the precast ground beam 4 are respectively erected above the sleeper beam 12.

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, the cross-sections at both ends of the precast ground beam 4 are rectangular, while the cross-section in the middle is I-shaped. This design saves materials without reducing the overall strength and improves tensile strength and seismic resistance.

[0045] like Figure 4 , Figure 7 and Figure 8As shown, the precast ground tie beam 4 has tie beam reinforcement 41 pre-cast inside it along its length. The tie beam reinforcement 41 extends and protrudes towards both ends of the precast ground tie beam 4. The tie beam reinforcement 41 consists of long tie beam reinforcement 411 distributed in a U-shape and short tie beam reinforcement 412 laid flat, as shown. Figure 7 As shown in the cross-sectional view at the end of the precast ground beam 4, the long tie beam reinforcement 411 and the short tie beam reinforcement 412 form a rectangular arrangement. When the long tie beam reinforcement 411 continues to extend outward to above the pile foundation 1 and overlaps with the axis of the pile foundation 1, as shown in the cross-sectional view at the end of the precast ground beam 4, the long tie beam reinforcement 411 and the short tie beam reinforcement 412 form a rectangular arrangement. Figure 8 As shown in the cross-sectional view, since the length of the short tie beam reinforcement 412 remains unchanged, only the long tie beam reinforcement 411 with a U-shaped distribution is visible in the cross-section. This allows for a gap to be left above the pile foundation 1, which is beneficial for the subsequent erection of the connecting support 5. After the connecting support 5 and the precast pier column 6 are erected, the short tie beam reinforcement 412 can be restored to strengthen the connection between the precast tie beam 4 and the pile foundation 1, the connecting support 5, and the precast pier column 6.

[0046] S3. At the upper notch position corresponding to the U-shaped distribution of the long tie beam reinforcement 411, the connecting bracket 5 is erected and installed from top to bottom, such as... Figure 11 As shown, the connecting bracket 5 consists of several vertical rods 51, horizontal rods 52 and diagonal rods 53. Adjacent vertical rods 51 are welded and fixed together by horizontal rods 52. Horizontal rods 52 are provided at the upper and lower ends of the vertical rods 51. Two diagonal rods 53 are intersected between two vertical rods 51 arranged in a mirror symmetrical manner. The two diagonal rods 53 are arranged in an X-shaped structure.

[0047] In this embodiment, the vertical rod 51 is an I-beam, which can reduce production costs. At the same time, the vertical rod 51 also has multiple perforations 511 at equal intervals from top to bottom.

[0048] Based on the difference in diameter between the pile foundation 1 and the precast pier 6, the connecting bracket 5 has a structure that gradually narrows from bottom to top, and the whole structure is a frustum. When the diameters of the pile foundation 1 and the precast pier 6 are equal, the connecting bracket 5 has a rectangular or cylindrical structure with equal width at the top and bottom.

[0049] During the installation of the connecting bracket 5, it is necessary to ensure that the vertical rod 51, horizontal rod 52 and diagonal rod 53 are all misaligned with the long tie beam reinforcement 411.

[0050] S4, such as Figure 9 As shown, the precast pier column 6 is hoisted above the connecting bracket 5. A through hole is opened in the middle of the precast pier column 6. During this process, as... Figure 3 As shown, the installation grooves 3 opened on the top surface of the pile foundation 1 and the bottom surface of the precast pier 6 are respectively matched and engaged with the two ends of the vertical rod 51 to complete the installation of the precast pier 6 and the connecting bracket 5.

[0051] S5, such as Figure 9 and Figure 10As shown, after the precast pier column 6 is installed above the connecting bracket 5, the ground beam reinforcement can be restored. Among the multiple short ground beam reinforcements 412 laid out in a flat manner, several short ground beam reinforcements 412 are first welded with extension bars, and then connected to the tie beam extension bars 42 and threaded sleeves 43 through the extension bars, so that their length is equivalent to that of the long ground beam reinforcements 411. The remaining short ground beam reinforcements 412 are directly connected to the tie beam extension bars 42 and threaded sleeves 43. The two types of extended short ground beam reinforcements 412 are arranged alternately. The length of the short ground beam reinforcements 412 is extended by the tie beam extension bars 42 and threaded sleeves 43, so that the ends of the short ground beam reinforcements 412 also extend to the top of the pile foundation 1. After the concrete is poured, the cross-length extension structure can effectively improve the tensile strength and seismic resistance of the precast ground beam 4 after installation and molding, and improve the overall quality of the precast ground beam 4.

[0052] S6, such as Figure 3 As shown, multiple circumferential bars are installed inside the pile foundation 1 and the precast pier 6 according to the reinforcement design requirements of the pier column, and multiple embedded steel bars 2 are installed circumferentially at equal intervals and welded to the circumferential bars. The embedded steel bars 2 are arranged vertically and their upper ends extend upward and are connected to threaded sleeves 21. The two threaded sleeves 21 that correspond to each other are connected by exposed steel bars 54.

[0053] like Figure 3 and Figure 12 As shown, the embedded reinforcing bars 2 are distributed in two concentric rings, and the corresponding exposed reinforcing bars 54 are also distributed in two concentric rings. Several exposed reinforcing bars 54 form two rings with the axis of the pile foundation 1 and the precast pier 6 as the center point. The two ends of the exposed reinforcing bars 54 are vertically connected to the threaded sleeves 21 at the corresponding positions on the bottom surface of the precast pier 6 and the top surface of the pile foundation 1, respectively. The multiple exposed reinforcing bars 54 in the inner ring and the multiple exposed reinforcing bars 54 in the outer ring are connected and fixed by spiral reinforcing bars 55. The spiral reinforcing bars 55 have a spiral structure. The spiral reinforcing bars 55 in the inner ring pass through multiple holes 511 on the vertical bar 51 from top to bottom and are connected to the multiple exposed reinforcing bars 54 in the inner ring. The connection method can be welding or wire binding. Compared with the traditional concrete pier column pressure bonding, the spiral spiral reinforcing bars 55 are connected to multiple exposed reinforcing bars 54 in sequence. This connection method greatly improves the shear resistance and seismic performance of the precast ground beam 4 after it is formed, and it is convenient and efficient to construct.

[0054] The same extension structure in step S5 is also applicable to the connection between the exposed steel bar 54 and the embedded steel bar 2 in step S6. That is, among the multiple embedded steel bars 2 arranged in the circumferential direction, several embedded steel bars 2 are first welded with extension bars, and then connected to the tie beam extension bar 42 and the threaded sleeve 43 through the extension bars to increase their length. The remaining embedded steel bars 2 are directly connected to the exposed steel bar 54. The embedded steel bars 2 of these two extension structures are arranged alternately. After the concrete is poured, the cross-length extension structure can also effectively improve the tensile strength and seismic resistance of the connecting bracket 5 and the precast ground tie beam 4.

[0055] S7, such as Figure 13 As shown, a wet-joint shell 7 is arranged outside the connecting bracket 5. The wet-joint shell 7 completely seals the cavity formed between the pile foundation 1, the precast pier 6, and the precast ground beam 4. During the installation of the wet-joint shell 7, multiple screws are first arranged radially at equal angles on the connecting bracket 5 so that the screws pass through the wet-joint shell 7. After the wet-joint shell 7 is tightly attached to the surfaces of the pile foundation 1, the precast pier 6, and the precast ground beam 4, nuts are used to connect with the screws and finally lock the wet-joint shell 7. Then, concrete is poured downward through the through hole opened in the middle of the precast pier 6 to fill the cavity. After the concrete solidifies, the wet-joint shell 7 is removed, and the construction of the ground beam of the precast pier is completed.

[0056] Compared to traditional technical solutions, the advantages of this method are that it significantly reduces the weight of the precast ground tie beam 4 during assembly, making it easier to transport and hoist, and facilitating its application in mountainous areas and areas with inconvenient transportation. The connecting bracket 5 not only reduces the weight of the precast ground tie beam 4, but also improves the connection between the pile foundation 1, the precast ground tie beam 4, and the precast pier column 6. The upper and lower forces between the pile foundation 1 and the precast pier column 6 are reliable. The special structure and construction method of the tie beam reinforcement 41 also make the connection between the precast ground tie beam 4 and the pile foundation 1 and the precast pier column 6 closer. Furthermore, the exposed reinforcement 54 is connected by the spiral structure of the wound reinforcement 55, which further increases the shear resistance, so that the shear resistance and seismic performance of the precast ground tie beam 4 are steadily improved.

[0057] In this embodiment, slots can be provided on the surfaces of the pile foundation 1, the precast pier column 6, and the precast ground beam 4 at positions corresponding to the wet-joint shell 7, to facilitate the docking of the wet-joint shell 7.

[0058] In this embodiment, the wet-bonded outer shell 7 is made of UHPC material.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for connecting the ground beam of a prefabricated pier column, characterized in that: Includes the following steps: S1. A cushion layer (11) is poured on the opposite side of the pile foundations (1) on both sides. The cushion layers (11) on both sides extend towards each other and a sleeper beam (12) is installed at the end away from the pile foundations (1). S2. The precast ground tie beam (4) is hoisted to the middle position of the two pile foundations (1) and the two ends of the precast ground tie beam (4) are respectively erected above the sleeper beam (12). The precast ground tie beam (4) has tie beam reinforcement (41) precast inside along its length direction. The tie beam reinforcement (41) consists of long tie beam reinforcement (411) distributed in U shape and short tie beam reinforcement (412) laid flat. Among them, the long tie beam reinforcement (411) extends to the top of the pile foundation (1). S3. At the upper notch position of the long tie beam reinforcement (411) corresponding to the U-shaped distribution, a connecting bracket (5) is installed from top to bottom. The connecting bracket (5) consists of several vertical bars (51), horizontal bars (52) and diagonal bars (53). S4. Hoist the precast pier (6) to the top of the connecting bracket (5). The precast pier (6) has a through hole in the middle so that the installation groove (3) opened on the top surface of the pile foundation (1) and the bottom surface of the precast pier (6) can be matched and engaged with the two ends of the vertical rod (51) to complete the installation of the connecting bracket (5). S5. The length of the short tie beam reinforcement (412) is extended by the tie beam extension reinforcement (42) and the threaded sleeve II (43), so that the end of the short tie beam reinforcement (412) also extends to the top of the pile foundation (1). During this process, the tie beam extension reinforcement (42) and the connecting bracket (5) are misaligned. S6, pile foundation (1) and precast pier (6) are equipped with multiple circumferential bars according to the design requirements of the pier reinforcement, and multiple embedded steel bars (2) are welded to the circumferential bars at equal intervals. The embedded steel bars (2) are arranged vertically and the upper end of the embedded steel bars (2) of the pile foundation (1) extends upward and is connected to the threaded sleeve (21). The two ends of the exposed steel bars (54) are vertically connected to the threaded sleeve (21) at the corresponding positions on the bottom surface of the precast pier (6) and the top surface of the pile foundation (1). The two threaded sleeves (21) that correspond to each other are connected by the exposed steel bars (54). The exposed steel bars (55) are arranged outside the exposed steel bars (54). The spiral steel bars (55) are spiral in shape. The vertical rod (51) has multiple through holes (511) at equal intervals from top to bottom. The spiral steel bars (55) pass through multiple through holes (511) from top to bottom and are welded and fixed to the exposed steel bars (54). S7. A wet-joint shell (7) is arranged outside the connecting bracket (5). The wet-joint shell (7) completely seals the cavity between the pile foundation (1), the precast pier (6) and the precast ground beam (4). Then, concrete is poured down through the through hole in the middle of the precast pier (6) to fill the cavity. After the concrete solidifies, the wet-joint shell (7) is removed to complete the ground beam construction of the precast pier.

2. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S1, the horizontal height of the pillow beam (12) is higher than the base ground line.

3. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S2, the cross-sections at both ends of the precast ground beam (4) are rectangular, while the cross-section in the middle of the precast ground beam (4) is I-shaped.

4. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S3, adjacent vertical bars (51) are welded and fixed together by horizontal bars (52). Two diagonal bars (53) are intersecting between the two mirror-symmetrical vertical bars (51), and the two diagonal bars (53) are arranged in an X-shaped structure.

5. The construction method for connecting the ground beam of a prefabricated pier column according to claim 4, characterized in that, Based on the difference in diameter between the pile foundation (1) and the precast pier (6), the connecting bracket (5) has a structure that gradually narrows from bottom to top.

6. The construction method for connecting the ground beam of a prefabricated pier column according to claim 4, characterized in that, A horizontal bar (52) is provided at both the upper and lower ends of the vertical bar (51).

7. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S3, the vertical rod (51) is an I-beam.

8. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S5, among the short tie beam bars (412) laid out in a flat manner, several short tie beam bars (412) are first welded with extension bars, and then connected to tie beam extension bars (42) and threaded sleeve two (43) through the extension bars. The remaining short tie beam bars (412) are directly connected to tie beam extension bars (42) and threaded sleeve two (43). The two configurations of short tie beam bars (412) are arranged alternately. The same connection method is also applicable to the connection between exposed steel bars (54) and embedded steel bars (2) in step S6.

9. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S6, the embedded steel bars (2) are distributed in two rings, one inside and one outside, and the corresponding exposed steel bars (54) and the wrapped steel bars (55) are also distributed in two rings, one inside and one outside.

10. The construction method for connecting the ground beam of a prefabricated pier column according to claim 1, characterized in that, In step S7, multiple screws are arranged radially at equal angles on the connecting bracket (5). When installing the wet joint shell (7), the screws are passed through the wet joint shell (7). After the wet joint shell (7) is tightly attached to the surface of the pile foundation (1), the precast pier (6) and the precast ground beam (4), the nuts are used to connect with the screws and finally lock the wet joint shell (7).

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