A prefabricated and assembled landscape pier and its construction method

Abstract

The present invention discloses a prefabricated and assembled landscape pier column and a construction method thereof. The prefabricated and assembled landscape pier column includes a support column, and a top plate and a bottom plate respectively arranged at the upper and lower ends of the support column. The support column is composed of a plurality of spiral rods arranged at intervals and spirally extending upward or downward around the same central axis, and the support column has a structure that is smaller in the middle and larger at both ends. It also includes a number of intermediate stiffening discs arranged at intervals along the extension direction of the spiral rods and located between the spiral rods, and the intermediate stiffening discs are located between the bottom plate and the top plate. The present invention provides a prefabricated and assembled landscape pier column with a unique and beautiful landscape shape and suitable for factory prefabrication production.

Description

Technical Field

[0001] The present invention relates to the technical field of highway and municipal bridge engineering, and particularly relates to a prefabricated and assembled landscape pier column and a construction method thereof. Background Art

[0002] The construction environment of urban road and bridge is complex. During construction, not only complex underground conditions such as the interlacing of underground utility tunnels and cables need to be faced, but also the current situation of heavy traffic flow and large pedestrian flow on the ground needs to be dealt with. During construction, the construction enclosure is relatively complex, traffic diversion is difficult, and the construction measure cost is relatively high. A long construction period not only increases the investment in construction enclosure, traffic diversion, and safety guarantee measures, but also causes inconvenience to the travel of citizens and has a certain negative impact on the city appearance. Therefore, optimizing the structural design and improving the construction technology to compress the construction period are of great significance.

[0003] Prefabricated and assembled construction, due to the use of factory precast components and on-site assembly construction, can not only well guarantee the construction quality of components, but also well compress the on-site construction period and reduce environmental pollution. It is more and more widely applied to urban bridge construction and is gradually replacing the traditional cast-in-place concrete construction. However, at present, prefabricated and assembled construction is mostly used for the upper structure of bridges, while for the lower structure of bridges, its application is relatively less.

[0004] With the development of cities and the improvement of people's living standards, people put forward higher requirements for a better living environment. As an important part of the urban living environment, the landscape shape of urban bridges has received more and more attention. An elegant bridge landscape shape can add luster to the urban living environment.

[0005] Therefore, it is of practical significance to design and develop a bridge pier column with a unique and elegant landscape shape, which is suitable for factory prefabrication and on-site assembly construction. Summary of the Invention

[0006] In view of the above-mentioned existing technical defects, the present invention provides a prefabricated and assembled landscape pier column with a unique and elegant landscape shape, which is suitable for factory prefabrication, and a construction method thereof.

[0007] In a first aspect, to solve the above technical problems, the present invention provides a prefabricated and assembled landscape pier column, including a support column, and a top plate and a bottom plate respectively arranged at the upper and lower ends of the support column. The support column is composed of a plurality of spiral rods arranged at intervals and spirally extending upward or downward around the same central axis, and the support column has a structure that is smaller in the middle and larger at both ends; it also includes a number of intermediate stiffening discs arranged at intervals along the extension direction of the spiral rods and located between the spiral rods, and the intermediate stiffening discs are located between the bottom plate and the top plate.

[0008] Further, the upper and lower ends of the spiral rod member are flush with the top plate and the bottom plate respectively and are welded and fixed.

[0009] Further, a welding groove for welding and fixing with the spiral rod member is provided at a position corresponding to the spiral rod member on the outer periphery of the middle stiffening disc, and the shape of the welding groove matches the outer shape of the spiral rod member.

[0010] Further, a welding groove for welding and fixing with the spiral rod member is provided at a position corresponding to the spiral rod member on the outer perimeters of the middle stiffening disc, the bottom plate and the top plate, and the shape of the welding groove matches the outer shape of the spiral rod member.

[0011] Further, the lower end of the spiral rod member extends downward out of the bottom plate.

[0012] Further, the upper end of the spiral rod member extends upward out of the top plate.

[0013] Further, hollow through holes are provided in the middles of the middle stiffening disc, the bottom plate and the top plate, and a plurality of fixing holes for bolts to pass through are provided through the top plate and the bottom plate.

[0014] Further, the spiral rod member is composed of single or multiple sections of hollow steel pipes connected together, and concrete is poured into the hollow steel pipes.

[0015] In a second aspect, the present invention also provides a construction method for a prefabricated and assembled landscape pier column, including the following steps:

[0016] S1. Pre-process the required top plate, bottom plate, middle stiffening disc and spiral rod member;

[0017] S2. Align and assemble the processed top plate, bottom plate, middle stiffening disc and spiral rod member at predetermined positions to form the prefabricated and assembled landscape pier column as described in any one of the above;

[0018] S3. Lift the assembled prefabricated and assembled landscape pier column onto the bearing platform and connect and fix it to the bearing platform through the bottom plate;

[0019] S4. Then, construct or lift and install the main beam on the prefabricated and assembled landscape pier column and connect and fix it to the main beam through the top plate;

[0020] S5. Anchor a number of vertical suspender bars between the middle arch rib and the steel main beam, and respectively anchor a number of obliquely arranged second inclined suspender bars and first inclined suspender bars between the inner and outer sides of the two side arch ribs and the steel main beam;

[0021] S6. Pour an STC layer and an asphalt wearing course on the top plate of the steel main beam in sequence.

[0022] Furthermore, the spiral rod member is composed of single or multiple continuous hollow steel pipes. In step S3, before or after hoisting, there is also a step of pouring concrete inside the spiral rod member.

[0023] The present invention has the following beneficial effects:

[0024] 1) The designed precast pier column has a graceful and dynamic shape. Multiple spiral rod members are wound around the same central axis and arranged at intervals in an orderly manner, with a highly curved beauty. Moreover, by adjusting the circumferential radius of the spiral rod members from the central axis at different heights, an overall hourglass shape with a slender middle and larger ends is formed, and the structure has a great sense of soft beauty.

[0025] 2) The spiral hourglass-shaped pier column has multiple spiral rod members, and multiple intermediate stiffening discs are arranged at intervals between the multiple spiral rod members. Firstly, it can improve the structural strength and reliability of the pier column. Secondly, according to the needs of different urban environmental scenarios, different colors can be painted on the intermediate stiffening discs or multiple colors can be used in combination, with a large space for artistic expression. In particular, through the combination of colored paint and lighting, this spiral hourglass-shaped pier column can have good aesthetic feeling both during the day and at night, from a distance and up close.

[0026] 3) The main structure of the spiral hourglass-shaped pier column can be made of steel and manufactured by precast method. The overall structure quality is relatively light and convenient for transportation; the shaping curve of the spiral rod member is smooth, and factory processing can ensure the processing quality. Therefore, the whole structure is very suitable for factory prefabrication production and on-site assembly construction. Generally speaking, for those with a height of 10m and below, they can be precast as a whole and then transported to the site for hoisting. For those with a height above 10m, they can be precast in segments according to actual needs, transported to the site in segments and spliced into a whole by bolting or welding. This type of pier column is applicable to various occasions with different bearing capacity requirements: when the structure has relatively low requirements for bearing capacity, such as small and medium-span urban bridges, pedestrian overpasses, some small and medium-span building roof trusses, bus and subway stations, etc., the pier column can adopt all-steel components, be precast as a whole, transported to the site and bolted with high-strength bolts embedded in the foundation or beam body, with convenient and rapid construction, and the structure can immediately bear the load, greatly reducing the on-site construction period; while when the structure has relatively high requirements for bearing capacity, such as large-span bridge piers, load-bearing columns of large-span stations, load-bearing columns of high-rise structures, etc., this type of pier column can adopt steel-concrete composite materials, that is, the spiral rod members adopt hollow steel pipes, and concrete is poured into the spiral rod members to form a steel pipe concrete structure, which can not only effectively improve the vertical bearing capacity of the pier column, but also ensure the local stability of the spiral rod members after the size is increased. For this type of large-bearing-capacity steel pipe concrete spiral hourglass-shaped pier column, it can be determined whether the concrete is poured during factory prefabrication or after on-site assembly according to transportation and lifting conditions, with strong selectivity and large operability, and a very wide range of applications.

[0027] 4) The helical slender-waist pier column has a light structure. However, its special helical spatial network shape gives it good overall stability, large structural stiffness, effectively utilizes structural materials, and its effective moment of inertia is very prominent. The overall structural radius can be adjusted according to different bearing capacity requirements, or the dimensions, number, wall thickness, etc. of the helical members can be adjusted. When needed, concrete can be poured into the helical members to form concrete-filled steel tubes to improve their bearing capacity. There are many design parameters for this type of pier column. By combining different design parameters, different bearing capacity requirements can be met. Therefore, this type of pier column has a very wide range of applicability. In addition to being used in bridges with different spans, it can also be used in building construction, various stadiums, and station structures.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 It is a schematic view of the precast and assembled landscape pier column in Embodiment 1;

[0031] Figure 2 It is a partial schematic view of the connection between the helical member and the intermediate stiffening plate in the embodiment;

[0032] Figure 3 It is a schematic view of the bottom plate and the top plate in the embodiment;

[0033] Figure 4 It is a schematic view of the intermediate stiffening plate in the embodiment;

[0034] Figure 5 It is a schematic view of the precast and assembled landscape pier column in Embodiment 2;

[0035] Figure 6 It is a perspective view of the precast and assembled landscape pier column connected to the pile cap and the main beam in Embodiment 3;

[0036] Figure 7 It is a perspective view of the precast and assembled landscape pier column connected to the pile cap and the main beam in Embodiment 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To better understand the technical content of the present invention, the present invention will be further introduced and described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc. is not the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present usage information and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, the descriptions such as "first", "second", etc. are used to distinguish different components, etc., do not represent a sequence, and do not limit that "first" and "second" are of different types.

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0039] Embodiment 1

[0040] As Figures 1-4 shown, a prefabricated and assembled landscape pier column shown in this embodiment includes a support column, and a top plate 1 and a bottom plate 2 respectively provided at the upper and lower ends of the support column. The support column is composed of a plurality of spiral rods 3 arranged at equal intervals and spirally extending upward or downward around the same central axis. The size and number of the spiral rods are not limited, and the number and size of the spiral rods can be specifically adjusted according to different scenarios and structural stress requirements. Moreover, the overall support column has a multi-spiral slender waist shape that is smaller in the middle and larger at both ends. Preferably, the support column gradually expands in equal dimensions from the middle position to both ends, so as to form a slender waist shape with symmetrical upper and lower dimensions bounded by the middle. The shape of the plurality of spiral spiral rods winding around the same central axis and arranged at intervals in an orderly manner is beautiful and vivid, with extremely beautiful curve and soft beauty. It also includes a number of intermediate stiffening discs 4 arranged at intervals along the extension direction of the spiral rods 3 and located between the plurality of spiral rods. The intermediate stiffening discs 4 are located between the bottom plate 2 and the top plate 1, and the internal space between the plurality of spiral rods is supported by the intermediate stiffening discs and fixed to the spiral rods by welding, which can improve the structural strength and reliability of the pier column.

[0041] In the above, the number and thickness of the intermediate stiffening discs are not limited, and their spacing and thickness can be adjusted according to the stress and segmentation conditions. As shown in the figure, in this embodiment, six intermediate stiffening discs are taken as an example, symmetrically arranged at the upper and lower ends of the prefabricated and assembled landscape pier column, and their sizes gradually increase from the middle of the support column to both ends according to the upper and lower shapes of the support column.

[0042] In this embodiment, the cross-sectional shape of the spiral rod is designed as a circle, which better meets people's aesthetic requirements. However, of course, the cross-sectional shape of the spiral rod is not limited to that of this embodiment, and it can also be designed into a square, a triangle, or other regular polygons according to actual needs.

[0043] In this embodiment, the upper and lower ends of the spiral rod 3 are flush with the top plate 1 and the bottom plate 2 respectively and are welded and fixed. Thus, the pier column uses the top plate and the bottom plate at the upper and lower ends to be connected and fixed to the main beam and the foundation structure (i.e., bridge piers and caissons, etc.) during bridge construction respectively. The top plate and the bottom plate can be directly welded to the steel plates pre-placed in the foundation structure or the main beam. Of course, the connection method between the multi-spiral slender-waist-shaped pier column and the foundation structure and the main beam is not limited to welding. A number of fixing holes 7 for bolts to pass through can also be provided through the top plate 1 and the bottom plate 2. These can be used as anchoring holes. Thus, a number of high-strength bolts can be pre-embedded at the positions corresponding to the fixing holes in the foundation structure and the main beam. Furthermore, the foundation structure and the main beam are connected to form a force-transmitting whole with the pier column through bolt connection, thereby forming a double-fixing structure of welding plus bolt connection or a single-fixing structure of one of the connection methods.

[0044] In this embodiment, a welding groove 5 for welding and fixing with the spiral rod 3 is provided at the outer periphery of the middle stiffening plate 4 at the position corresponding to each spiral rod 3. And the shape of the welding groove 5 matches the outer shape of the spiral rod 3. In this way, the inner side surface of the spiral rod passes through the welding groove and then the two are welded. Since the spiral rods are arranged at equal intervals, the outer arc of the middle stiffening plate can be equally divided according to the number of spiral rods, and welding grooves that are connected to and match the shape of the spiral rods are processed at each equal division point. In addition, the equal division points of each middle stiffening plate correspond to each other in the same plane in sequence, that is, the positions of the upper and lower welding grooves correspond one by one. Generally speaking, the welding points of a certain spiral rod on adjacent stiffening plates are staggered by one equal division position. Of course, according to needs, they can also be staggered by two, three, or other multiple equal division positions in sequence to change the spiral curvature of the spiral rod by the number of staggered equal division positions.

[0045] In this embodiment, hollow through holes 6 are also provided in the middle of the middle stiffening plate 4, the bottom plate 2, and the top plate 1 to form an annular structure to reduce the overall weight and improve the appearance beauty. Of course, the outer shapes of the middle stiffening plate, the bottom plate, and the top plate are not limited to the annular shape, and they can also be solid circles.

[0046] In a specific implementation case, according to the height of this multi-spiral slender-waist-shaped pier column, the spiral rods can be fabricated in sections. The joints of the sections should be set at the middle stiffening plates, and the middle stiffening plates at the joints should be thickened. Generally speaking, for those with a height of 10 m and below, the pier column can be prefabricated as a whole and transported to the site for assembly. For those with a height exceeding 10 m, the pier column can be segmented at the middle stiffening plates according to actual needs and transported to the site and spliced into a whole by bolt connection or welding.

[0047] In a specific embodiment, according to whether it is segmented, the spiral rod member is composed of single or multiple hollow steel pipes connected together, and concrete can be poured into the spiral rod member according to the force requirements to form a concrete-filled steel tube member, so as to improve the stability of the spiral rod member and the bearing capacity of the structure. The wall thickness of the hollow steel pipe can also be adjusted according to different scenarios and the force requirements of the structure. Of course, the spiral rod member can also be made of solid steel.

[0048] Embodiment 2

[0049] As Figure 5 shown, a prefabricated and assembled landscape pier column shown in this embodiment has a structure basically the same as that described in Embodiment 1. The difference lies in the connection structure between the spiral rod member and the top plate and the bottom plate. Specifically:

[0050] In this embodiment, when the bearing capacity requirement is high, both the bottom plate and the top plate can adopt relatively thick integral discs. The outer peripheries of the bottom plate and the top plate are also provided with a welding groove 5 welded and fixed to the spiral rod member at the position corresponding to each spiral rod member, and the lower end of the spiral rod member extends downward out of the bottom plate 2, and its upper end is flush with the top plate. By using the extended length, the extended part can be poured into the foundation structure to ensure reliable force transmission between it and the foundation structure.

[0051] Of course, in a specific embodiment, the upper end of the spiral rod member can also extend upward out of the top plate. By using the extended length, the extended part can be poured into the main beam to ensure reliable force transmission between it and the beam body.

[0052] Embodiment 3

[0053] A construction method of a prefabricated and assembled landscape pier column shown in this embodiment is used to construct the prefabricated and assembled landscape pier column as described in Embodiment 1. The connection methods between the prefabricated and assembled landscape pier column and the foundation structure and the main beam both adopt high-strength bolt connection. Specifically, it includes the following steps:

[0054] a. Determine various design parameters of the prefabricated and assembled landscape pier column according to the actual engineering needs; determine the pier height according to the engineering elevation and conduct segmented design; determine the cross-sectional shape, size, number of the spiral rod members and whether to pour concrete inside according to the force requirements of the pier column; determine the inner diameter, outer diameter, plate thickness and number of each intermediate stiffening plate; determine the inner diameter, outer diameter, plate thickness, number of openings and size of the top plate and the bottom plate; determine the circumferential radius of the overall spiral rod member around the rotation center (i.e., the central axis), etc.

[0055] b. Use steel to lay out and process the required spiral rod members, intermediate stiffening plates, top plates and bottom plates in the factory, including processing welding grooves and fixing holes on the intermediate stiffening plates, top plates and bottom plates.

[0056] In the above, to ensure the precise machining of the multi - spiral slender - waist pier column, a long strip - shaped hollow steel pipe can be first machined according to the determined cross - section form based on the designed length of the spiral rod, and the length of the hollow steel pipe should be slightly longer than the designed length. Then, according to the requirements of the spiral shape, the welding points of each hollow steel pipe on each intermediate stiffening disc are marked in sequence, numbered for distinction. After determining the welding points of each hollow steel pipe on each intermediate stiffening disc in the previous step, according to the designed bending arc and taking each numbered position as the bending node, each hollow steel pipe is bent into an arc to form a spiral rod; for the spiral rods arranged in segments, the segments can also be numbered in sequence to facilitate the later splicing and assembly.

[0057] In the above, according to the overall waist - shrinking shape and height of the multi - spiral slender - waist pier column, the radius sizes of each intermediate stiffening disc at different positions are determined, and each intermediate stiffening disc is machined in sequence and numbered from top to bottom to facilitate the later alignment and assembly. Then, the outer arc of each intermediate stiffening disc is equally divided according to the number of spiral rods, and welding grooves connected to the spiral rods are machined at each equal - division point; generally, the welding points of a certain spiral rod on adjacent stiffening discs are staggered by one equal - division position. According to needs, they can also be staggered by two, three, or more equal - division positions in sequence.

[0058] c. In the factory, each intermediate stiffening disc, top plate, and bottom plate are successively welded to the spiral rod to form the prefabricated and assembled landscape pier column as described in Embodiment 1; of course, for the convenience of transportation, the above - mentioned components can also be transported to the construction site and then welded in place to form a whole.

[0059] In the above, on a special processing operation rack, the intermediate stiffening discs, top plate, and bottom plate are placed according to the design spacing in sequence according to the numbers, and it is necessary to ensure that the centers of each stiffening disc are on the same straight line, and the equal - division points of each stiffening disc are correspondingly on the same plane in sequence.

[0060] d. After being welded into a whole, the processing dimensions are checked against the design parameters. After all dimensions are correct, the next rust removal and anti - corrosion treatment can be carried out; specifically, the welded multi - spiral slender - waist pier column is polished and rust - removed, and anti - corrosion primer, intermediate paint, etc. are sprayed successively according to the designed anti - corrosion coating.

[0061] In the above, if it is designed to pour concrete into the spiral rod, then the concrete pouring and curing are carried out in the factory; at this point, the factory processing stage of the multi - spiral slender - waist pier column is completed, and the formwork can be removed and stored, waiting to be transported to the site for assembly; of course, it can also be determined according to the transportation and lifting conditions whether the concrete is poured during factory prefabrication or after being transported to the construction site and assembled.

[0062] e. To install the prefabricated and assembled landscape pier column at the construction site, first construct the foundation and tie the cap beam steel bars at the predetermined position of the pier, and embed the bolts and contact bearing steel plates for connection;

[0063] f. Pour the cap beam concrete and cure it;

[0064] g. Transport the prefabricated landscape pier column with a multi - spiral slender waist shape from the factory to the site and hoist it onto the cap beam;

[0065] h. Align the fixing holes on the bottom plate with the bolts on the cap beam, and then tighten the nuts to install and fix the landscape pier column with a multi - spiral slender waist shape onto the cap beam (as shown in Figure 6 );

[0066] i. Construct the upper main beam and connect it with the pier column. Bolts and contact steel plates for connecting with the top plate of the pier column are embedded at the bottom of the main beam, and the structure of the bottom of the main beam is the same as that of the cap beam;

[0067] j. Apply colored paint to the pier column and install landscape lights.

[0068] Example 4

[0069] A construction method of a prefabricated and assembled landscape pier column shown in this example is used to construct the prefabricated and assembled landscape pier column as described in Example 2. The length of the lower end of the spiral rod member extends and is embedded in the connecting cap beam, and the bottom plate is welded and fixed to the cap beam steel bars. The connection with the main beam uses bolt connection. The construction method described in this example is basically the same as the construction method described in Example 3, with the differences in steps e to j being as follows:

[0070] e. To install the prefabricated and assembled landscape pier column at the construction site, first construct the foundation and tie the cap beam steel bars at the predetermined position of the pier;

[0071] f. Transport the prefabricated landscape pier column with a multi - spiral slender waist shape from the factory to the site and hoist it in place so that the length of the lower end of the spiral rod member is inserted into the cap beam steel bars;

[0072] g. Then weld and fix the bottom plate to the cap beam steel bars;

[0073] h. Pour the cap beam concrete and cure it so that the length of the lower end of the spiral rod member is embedded in the poured cap beam (as shown in Figure 7 );

[0074] i. Construct the upper main beam and connect it with the pier column. Bolts and contact steel plates for connecting with the top plate of the pier column are embedded at the bottom of the main beam;

[0075] j. Apply colored paint to the pier column and install landscape lights.

[0076] The above has introduced in detail the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present invention. The description of the above embodiments is only applicable to helping understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A prefabricated and assembled landscape pier column, characterized in that, it includes a support column, as well as a top plate and a bottom plate respectively arranged at the upper and lower ends of the support column. The lower end of the spiral rod extends downward out of the bottom plate; the support column is composed of multiple spiral rods arranged at intervals and spirally extending upward or downward around the same central axis, and the support column has a structure that is smaller in the middle and larger at both ends; the spiral rod is composed of single-section or multi-section hollow steel pipes connected, and concrete is poured into the hollow steel pipes; it also includes several intermediate stiffening discs arranged at intervals along the extension direction of the spiral rod and located between the spiral rods, and the intermediate stiffening discs are located between the bottom plate and the top plate, and the size of the intermediate stiffening discs gradually increases from the middle of the support column to both ends; welding grooves for welding and fixing with the spiral rod are provided at corresponding positions of the outer circumferences of the intermediate stiffening discs, the bottom plate and the top plate, and the shape of the welding grooves matches the outer shape of the spiral rod; The construction method of the prefabricated and assembled landscape pier column includes the following steps: S1. Pre-process the required top plate, bottom plate, intermediate stiffening discs and spiral rods; Among them, according to the waist-reducing shape and height of the overall multi-spiral thin-waisted pier column, determine the radius sizes of the intermediate stiffening discs at different positions, process each intermediate stiffening disc in sequence and number them in the order from top to bottom for convenient later alignment and assembly, and equally divide the outer arcs of each intermediate stiffening disc according to the number of spiral rods, and process welding grooves for connecting with the spiral rods at each equal division point; Process long strip-shaped hollow steel pipes according to the designed length of the spiral rod and the determined cross-sectional form, and then, according to the spiral shape requirements, mark the welding points of each hollow steel pipe on each intermediate stiffening disc in sequence, number and distinguish them in sequence. After determining the welding points of each hollow steel pipe on each intermediate stiffening disc in the previous step, according to the designed bending radian and using each numbered position as a bending node, perform bending and arc-forming processing on each hollow steel pipe to form spiral rods; S2. Sequentially weld the processed intermediate stiffening discs, top plate and bottom plate with the spiral rods to form the prefabricated and assembled landscape pier column; S3. To realize the installation of the prefabricated and assembled landscape pier column at the construction site, first construct the foundation and bind the cap steel bars at the predetermined position of the pier; S4. Hoist the assembled prefabricated and assembled landscape pier column in place so that the length of the lower end of the spiral rod extends out and is inserted into the cap steel bars; the spiral rod is composed of single-section or multi-section continuous hollow steel pipes, and the step of pouring concrete into the spiral rod is also included before or after hoisting; S5. Then weld the bottom plate with the cap steel bars and fix them; S6. Pour the cap concrete and cure it so that the length of the lower end of the spiral rod extending out is embedded in the poured cap; S7. Then build or hoist the main beam on the prefabricated and assembled landscape pier column and connect and fix it with the main beam through the top plate.

2. The prefabricated and assembled landscape pier column according to claim 1, characterized in that, the upper end of the spiral rod is flush with the top plate and is welded and fixed.

3. The prefabricated and assembled landscape pier column according to claim 1, characterized in that, the upper end of the spiral rod extends upward out of the top plate.

4. The prefabricated and assembled landscape pier column according to any one of claims 1-3, characterized in that, hollow through holes are provided in the middle of the middle stiffening plate, the bottom plate and the top plate, and a plurality of fixing holes for bolts to pass through are provided through the top plate and the bottom plate.

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