A kind of assembled core tube structure and construction method thereof

Abstract

The present invention belongs to the field of building construction technology, and in particular to an assembled core tube structure and a construction method thereof, wherein four cylindrical grooves are respectively opened at the four corners on the top of the core tube body, and main splicing plates are respectively arranged at the four corners on the top of the core tube body, and four cylindrical blocks are respectively fixedly connected to the bottoms of the plurality of main splicing plates, and the cylindrical blocks are snap-fitted with the cylindrical grooves, and a same sealing assembly for sealing is arranged on the tops of the four main splicing plates; a sealing assembly for sealing the side surfaces of the device is respectively arranged between the four main splicing plates; a supporting assembly is arranged between the four main splicing plates and below the sealing assembly, and is used for supporting the connection between the sealing assemblies; and the problem that the splicing technology of the existing assembled structure is difficult to realize reliable assembly in high-rise and super-high-rise buildings with high structural height and heavy load is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and relates to an assembled core tube structure and a construction method thereof. Background Art

[0002] The development of prefabricated buildings is one of the important methods to promote the development of building industrialization, improve and ensure the quality of projects. It is also an important measure to promote the transformation and upgrading of the current construction industry and move towards modernization, which is conducive to improving production efficiency and saving energy. Prefabricated concrete structures mainly include prefabricated frame structures, prefabricated frame-shear wall structures and prefabricated shear wall structures. For super-high-rise core tube structures, especially super-high-rise core tube structures with four oblique sides, assembly is rarely used.

[0003] This is mainly due to insufficient relevant research, and the existing splicing technology of prefabricated structures is difficult to implement in high-rise and super-high-rise buildings with high structural heights and heavy loads. Summary of the invention

[0004] In view of this, the present invention provides an assembled core tube structure and a construction method thereof in order to solve the problem that the splicing technology of assembled structures is difficult to achieve reliable assembly in high-rise and super-high-rise buildings with high structural heights and heavy loads.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] An assembled core tube structure, comprising:

[0007] The core barrel body has four cylindrical grooves at the top four corners of the core barrel body, and main splicing plates are arranged at the top four corners of the core barrel body. The bottoms of the main splicing plates are fixedly connected with four cylindrical blocks, which are snap-fitted with the cylindrical grooves. The tops of the four main splicing plates are provided with a same sealing assembly for sealing;

[0008] A blocking component for blocking the side of the device is provided between the four main splicing plates;

[0009] A support assembly is arranged between the four main splicing plates and below the cover assembly, and is used to support the connection between the plugging assemblies.

[0010] Furthermore, the blocking assembly includes a middle splicing plate and two side splicing plates, the two side splicing plates are respectively located on both sides of the middle splicing plate, the top of the core tube body is provided with multiple groups of two symmetrically arranged first vertical grooves, the bottom of the first vertical grooves is provided with connected side grooves, the bottom of the middle splicing plate is fixedly connected with two symmetrically arranged blocking blocks, the bottom of the side splicing plate is fixedly connected with two symmetrically arranged L-shaped plug-ins, the L-shaped plug-ins are used in conjunction with the side grooves, and the blocking blocks are used in conjunction with the first vertical grooves.

[0011] Furthermore, the blocking assembly also includes a plurality of No. 1 positioning rectangular blocks fixedly connected to one side of the side splicing plate, a plurality of No. 1 positioning rectangular grooves are opened on one side of the main splicing plate, the No. 1 positioning rectangular grooves are clamped with the No. 1 positioning rectangular blocks, a strip groove is opened on one side of the side splicing plate, and strip plates are fixedly connected on both sides of the middle splicing plate, and the strip plates and the strip grooves are used in conjunction with each other.

[0012] Furthermore, the sealing assembly includes an upper cover plate, the four bottom corners of which are fixedly connected with a No. 2 positioning rectangular block, and the top of the main splicing plate is provided with a No. 2 positioning rectangular groove, which is used in conjunction with the No. 2 positioning rectangular block.

[0013] Furthermore, the support assembly includes four groups of support frames connected end to end, the support frames include an inner support plate No. 1 and an inner support plate No. 2, a first cavity is provided inside the inner support plate No. 1 and the inner support plate No. 2, a circular groove is provided at one end of the inner support plate No. 1, a circular block is fixedly connected to one end of the inner support plate No. 2, the circular groove is clamped with the circular block, a groove is provided at one end of the inner support plate No. 1, a protrusion is fixedly connected to one end of the inner support plate No. 2, the protrusion and the groove are used together, and a connecting groove is provided at the ends of the inner support plate No. 1 and the inner support plate No. 2 that are away from each other, and the connecting groove is connected with the first cavity.

[0014] Furthermore, a casting hole is provided on the top of the No. 1 inner support plate and the No. 2 inner support plate, and the casting hole is connected to the first cavity. A second cavity is provided on one side of the No. 1 inner support plate and the No. 2 inner support plate, and a connecting hole is provided between the second cavity and the first cavity. A resistance plate is slidably penetrated inside the second cavity, and a trapezoidal block is slidably penetrated inside the connecting hole. The inclined surface of the trapezoidal block is used in conjunction with the resistance plate, and the trapezoidal block is located directly below the casting hole.

[0015] Furthermore, two symmetrically arranged No. 3 positioning rectangular grooves are opened on one side of the top of the middle splicing plate, a circular groove is opened on the bottom inner wall of the No. 3 positioning rectangular groove, a plurality of round rods are fixedly connected to the bottom of the upper cover plate, and one side of the No. 1 inner support plate and the No. 2 inner support plate are fixedly connected with a No. 3 positioning rectangular block, and a circular hole is opened inside the No. 3 positioning rectangular block, and the circular hole and the circular groove are used in conjunction with the round rod, and the No. 3 positioning rectangular groove is used in conjunction with the No. 3 positioning rectangular block.

[0016] Furthermore, a plurality of sealing rods are fixedly connected to the bottom of the upper cover plate, and the sealing rods are used in conjunction with the casting holes.

[0017] A construction method for an assembled core tube structure specifically comprises the following steps:

[0018] S1. Casting of precast components: First, cast all required precast components in advance, including No. 1 inner support plate, No. 2 inner support plate, middle splicing plate, side splicing plate, main splicing plate and upper cover plate.

[0019] S2. Install the main splicing plates: Place the four main splicing plates at the top four corners of the core tube body and complete the installation by positioning the cylindrical blocks and cylindrical grooves.

[0020] S3, installing the side splicing board: after the L-shaped plug of the side splicing board is completely inserted into the first vertical groove, the side splicing board is moved horizontally so that the protruding part of the L-shaped plug enters the side groove, and at the same time, the No. 1 positioning rectangular groove is engaged with the No. 1 positioning rectangular block.

[0021] S4. Install the middle splicing board: install the middle splicing board from the top, insert the strip board into the strip groove, and insert the blocking block into the first vertical groove to fill the gap between the L-shaped plug block and the first vertical groove.

[0022] S5. Install the inner support plate: pre-connect the No. 1 inner support plate and the No. 2 inner support plate, then splice them together into a rectangular frame, put it between the main splicing plates, and fix it through the No. 3 positioning rectangular block and the No. 3 positioning rectangular groove.

[0023] S6. Install the contact plate: The trapezoidal block falls under the action of gravity, enters the connecting hole, pushes the contact plate out, and contacts the middle splicing plate and the side splicing plate to ensure the connection stability.

[0024] S7. Pouring concrete: injecting concrete into the first cavity through the pouring hole to fill the gap between the second cavity and the first cavity to enhance the structural stability.

[0025] S8. Install the upper cover: Install the upper cover in place, insert the No. 2 positioning rectangular block into the No. 2 positioning rectangular groove, seal the casting hole with the sealing rod, and insert the round rod into the round hole and the round groove to strengthen the connection.

[0026] The assembled core tube structure disclosed in the present invention has the following advantages:

[0027] 1. Improve construction efficiency: The on-site splicing of prefabricated components greatly reduces the amount of wet work on site, shortens the construction period, and improves construction efficiency.

[0028] 2. Enhanced structural stability: Through precise positioning and snap-in design, such as the cooperation between the L-shaped plug and the first vertical groove and the side groove, and the snap-in between the No. 1 positioning rectangular groove and the No. 1 positioning rectangular block, the overall stability and connection strength of the structure are enhanced.

[0029] 3. Ensure construction quality: Prefabricated components are produced in the factory with controllable quality, which reduces errors and uncertainties in on-site construction and improves the overall construction quality.

[0030] 4. Easy to maintain later: The modular design makes the later maintenance and replacement more convenient and quick, reducing the maintenance cost.

[0031] 5. Enhanced seismic performance: The design of trapezoidal blocks and contact plates enables the structure to provide better seismic performance and stability when subjected to external forces such as earthquakes.

[0032] 6. Environmental protection and energy saving: The use of prefabricated components reduces construction waste and noise pollution generated by on-site wet operations, which is in line with the development trend of environmental protection and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0034] Figure 1 It is a three-dimensional structural schematic diagram of an assembled core tube structure of the present invention;

[0035] Figure 2 An exploded view of an assembled core tube structure of the present invention;

[0036] Figure 3 It is a cross-sectional view of a side groove of a core tube body in a prefabricated core tube structure of the present invention in the vertical direction;

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of a main splicing plate in an assembled core tube structure of the present invention;

[0038] Figure 5 It is a three-dimensional structural schematic diagram of a side splicing plate and a middle splicing plate in an assembled core tube structure of the present invention;

[0039] Figure 6 It is a three-dimensional structural schematic diagram of a plurality of No. 1 inner support plates and No. 2 inner support plates in an assembled core tube structure of the present invention;

[0040] Figure 7 It is a three-dimensional structural schematic diagram of a No. 1 inner support plate and a No. 2 inner support plate in an assembled core tube structure of the present invention;

[0041] Figure 8 It is a schematic diagram of the exploded structure of a No. 1 inner support plate and a No. 2 inner support plate in an assembled core tube structure of the present invention;

[0042] Fig. 9 It is a schematic diagram of the three-dimensional structure of a No. 1 inner support plate in an assembled core tube structure of the present invention;

[0043] Fig.10 The figure is a schematic diagram of the three-dimensional structure of an upper cover plate in an assembled core tube structure of the present invention.

[0044] In the figure: 1. Core tube body; 2. Middle splicing plate; 3. Side splicing plate; 4. Main splicing plate; 5. Upper cover plate; 6. L-shaped plug block; 7. First vertical slot; 8. Cylindrical block; 9. Side slot; 10. Cylindrical slot; 11. No. 1 positioning rectangular slot; 12. No. 2 positioning rectangular slot; 13. No. 1 positioning rectangular block; 14. Blocking block; 15. Strip plate; 16. Round slot; 17. No. 3 positioning rectangular slot; 18. Strip Groove; 19, No. 3 positioning rectangular block; 20, round hole; 21, No. 1 inner support plate; 22, No. 2 inner support plate; 23, casting hole; 24, abutment plate; 25, groove; 26, connecting groove; 27, convex block; 28, round groove; 29, round block; 30, trapezoidal block; 31, first cavity; 32, second cavity; 34, connecting hole; 35, round rod; 36, No. 2 positioning rectangular block; 37, sealing rod. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] Reference Figure 1-10 The present invention provides an assembled core tube structure, and the specific implementation is as follows:

[0047] First, prepare the core tube body 1, and pre-open four cylindrical grooves 10 at the four corners of the top thereof for clamping and fixing with the cylindrical blocks 8 of the main splicing plate 4. Next, prepare four main splicing plates 4, and weld four cylindrical blocks 8 at the bottom of each main splicing plate 4 to ensure accurate matching with the cylindrical grooves 10 of the core tube body 1.

[0048] Subsequently, a blocking assembly is made. The blocking assembly includes a middle splicing plate 2 and two side splicing plates 3. Two symmetrically arranged blocking blocks 14 are welded to the bottom of the middle splicing plate 2, and two L-shaped plug blocks 6 are welded to the bottom of the side splicing plate 3. At the top of the core tube body 1, multiple groups of symmetrically arranged first vertical grooves 7 are opened, and side grooves 9 connected to the first vertical grooves 7 are opened at the bottom. During installation, the blocking blocks 14 of the middle splicing plate 2 are aligned with the first vertical grooves 7 and inserted, and at the same time, the L-shaped plug blocks 6 of the side splicing plates 3 are inserted into the side grooves 9 to achieve preliminary fixation.

[0049] In order to further enhance the stability of the plugging assembly, a plurality of No. 1 positioning rectangular blocks 13 are fixedly connected to one side of the side splicing plate 3, and a No. 1 positioning rectangular groove 11 is provided on one side of the main splicing plate 4. The No. 1 positioning rectangular block 13 and the No. 1 positioning rectangular groove 11 are engaged with each other to achieve accurate positioning of the side splicing plate 3 on the main splicing plate 4. In addition, a strip groove 18 is provided on one side of the side splicing plate 3, and strip plates 15 are fixed on both sides of the middle splicing plate 2. The strip plates 15 are inserted into the strip groove 18, which further stabilizes the connection between the middle splicing plate 2 and the side splicing plate 3.

[0050] Next, install the support assembly. The support assembly is composed of four groups of support frames connected end to end, and each group of support frames includes an inner support plate No. 1 21 and an inner support plate No. 2 22. A circular groove 28 is provided at one end of the inner support plate No. 1 21, and a circular block 29 is fixed at one end of the inner support plate No. 2 22. The initial connection of the support frame is achieved by the clamping of the circular groove 28 and the circular block 29. At the same time, a groove 25 is provided at the other end of the inner support plate No. 1 21, and a protrusion 27 is fixed at the other end of the inner support plate No. 2 22. The protrusion 27 cooperates with the groove 25 to further enhance the connection strength of the support frame. The support frame is installed between the four main splicing plates 4, located below the cover assembly, to support the connection between the plugging assemblies.

[0051] A first cavity 31 is provided inside the support frame, and a casting hole 23 is provided on the top to communicate with the first cavity 31. A second cavity 32 is also provided on one side of the No. 1 inner support plate 21 and the No. 2 inner support plate 22, and is communicated with the first cavity 31 through a connecting hole 34. A resistance plate 24 slides through the second cavity 32, and a trapezoidal block 30 slides through the connecting hole 34. During the pouring process, concrete enters the first cavity 31 through the casting hole 23, and the trapezoidal block 30 slides down under the action of the gravity of the concrete, pushing the resistance plate 24 to extend outward, further stabilizing the connection between the middle splicing plate 2 and the side splicing plate 3.

[0052] Finally, install the cover assembly. The cover assembly consists of an upper cover plate 5, on which the four corners are welded with No. 2 positioning rectangular blocks 36, which match the No. 2 positioning rectangular groove 12 on the top of the main splicing plate 4. At the same time, a plurality of round rods 35 and sealing rods 37 are fixed to the bottom of the upper cover plate 5. The round rods 35 match the round grooves 16 in the No. 3 positioning rectangular grooves 17 on the top of the middle splicing plate 2 and the round holes 20 in the No. 3 positioning rectangular blocks 19 on the No. 1 inner support plate 21 and the No. 2 inner support plate 22 to achieve precise positioning; the sealing rods 37 are inserted into the casting holes 23 to ensure the sealing of the casting holes.

[0053] When assembling the assembled core tube structure, the first inner support plate 21, the second inner support plate 22, the middle splicing plate 2, the side splicing plate 3, the main splicing plate 4 and the upper cover plate 5 are pre-cast first, and then spliced ​​after the casting is completed;

[0054] First, place the four main splicing plates 4 on the four sides at the top four corners of the core tube body 1, and complete the installation process of the four main splicing plates 4 by positioning the cylindrical block 8 and the cylindrical groove 10, and then install multiple side splicing plates 3. First, make the L-shaped plug block 6 completely enter the interior of the first vertical groove 7, and then move the side splicing plate 3 laterally in the direction close to the main splicing plate 4. At this time, the protruding part of the L-shaped plug block 6 is inserted into the interior of the side groove 9, and multiple No. 1 positioning rectangular grooves 11 are engaged with the No. 1 positioning rectangular block 13, completing the installation process of the side splicing plate 3;

[0055] Then install multiple middle splicing plates 2 from above, and after the strip plate 15 is inserted into the strip groove 18, and the blocking block 14 enters the first vertical groove 7, the gap between the L-shaped plug block 6 and the first vertical groove 7 can be filled to ensure the stability of the side splicing plates 3;

[0056] Then, multiple No. 1 inner support plates 21 and No. 2 inner support plates 22 are installed. First, the No. 1 inner support plates 21 and No. 2 inner support plates 22 located on the same side are spliced. At this time, the No. 1 inner support plates 21 and No. 2 inner support plates 22 are located at the same level, so that the circular grooves 28 are engaged with the circular blocks 29, and the No. 1 inner support plates 21 and No. 2 inner support plates 22 are pre-connected. Then, multiple groups of No. 1 inner support plates 21 and No. 2 inner support plates 22 are spliced ​​with each other, so that after the grooves 25 and the protrusions 27 are matched, the multiple No. 1 inner support plates 21 and No. 2 inner support plates 22 are spliced ​​into a rectangular frame;

[0057] Place the rectangular frame between the multiple main splicing plates 4 from top to bottom. At this time, the No. 3 positioning rectangular block 19 enters the interior of the No. 3 positioning rectangular groove 17 to fix the No. 1 inner support plate 21 and the No. 2 inner support plate 22, and align the circular groove 16 with the circular hole 20. At this time, the trapezoidal block 30 can fall under the action of gravity. At this time, the trapezoidal block 30 enters the interior of the connecting hole 34 and pushes the contact plate 24 to move horizontally. The contact plate 24 can extend from the interior of the second cavity 32, and the inclined surface of the contact plate 24 is in conflict with one side of the middle splicing plate 2 and the side splicing plate 3, ensuring the stability of the connection between the middle splicing plate 2 and the side splicing plate 3;

[0058] At this time, concrete can be injected into the first cavity 31 through the pouring hole 23, so that the gap between the second cavity 32 and the first cavity 31 can be filled with concrete, ensuring the stability of the extension of the contact plate 24, and the connection between the plurality of No. 1 inner support plates 21 and the No. 2 inner support plates 22 can be made more stable through the connection of the connecting groove 26. The pouring hole 23 is arranged directly above the trapezoidal block 30 to prevent the trapezoidal block 30 from being blocked in the connecting hole 34 when it is not completely dropped. At this time, the weight of the concrete can help the trapezoidal block 30 to move downward, ensuring that the contact plate 24 moves into place.

[0059] After the concrete filling is completed, the upper cover plate 5 is installed. At this time, the No. 2 positioning rectangular block 36 can be inserted into the No. 2 positioning rectangular groove 12, and the sealing rod 37 blocks the multiple casting holes 23, which can also improve the stability of the connection between the No. 1 inner support plate 21, the No. 2 inner support plate 22 and the upper cover plate 5. After multiple round rods 35 are inserted into the circular holes 20 and the circular grooves 16 in turn, the connection stability of the centering splicing plate 2, the No. 1 inner support plate 21 and the No. 2 inner support plate 22 can be further improved.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An assembled core tube structure, characterized in that: include: A core tube body (1), wherein four cylindrical grooves (10) are respectively formed at four corners of the top of the core tube body (1), and main splicing plates (4) are respectively provided at four corners of the top of the core tube body (1), and four cylindrical blocks (8) are respectively fixedly connected to the bottoms of the plurality of main splicing plates (4), and the cylindrical blocks (8) are respectively snap-fitted with the cylindrical grooves (10), and the tops of the four main splicing plates (4) are respectively provided with a same sealing assembly for sealing, and the sealing assembly comprises an upper cover plate (5), and four corners of the bottom of the upper cover plate (5) are respectively fixedly connected with a No. 2 positioning rectangular block (36), and the top of the main splicing plate (4) is formed with a No. 2 positioning rectangular groove (12), and the No. 2 positioning rectangular groove (12) is used in conjunction with the No. 2 positioning rectangular block (36); A blocking component for blocking the side of the device is arranged between the four main splicing plates (4), the blocking component comprises a middle splicing plate (2) and two side splicing plates (3), the two side splicing plates (3) are respectively located on both sides of the middle splicing plate (2), the top of the core tube body (1) is provided with a plurality of groups of two symmetrically arranged first vertical grooves (7), the bottom of the first vertical grooves (7) is provided with interconnected side grooves (9), the bottom of the middle splicing plate (2) is fixedly connected with two symmetrically arranged blocking blocks (14), the bottom of the side splicing plate (3) is fixedly connected with two symmetrically arranged L-shaped plug blocks (6), the L-shaped plug blocks (6) are used in conjunction with the side grooves (9), and the blocking blocks (14) are used in conjunction with the first vertical grooves (7); A support assembly, the support assembly being arranged between the four main splicing plates (4) and below the sealing assembly, and being used to support the connection between the sealing assemblies, the support assembly comprising four groups of support frames connected end to end, the support frames comprising a first inner support plate (21) and a second inner support plate (22), the first inner support plate (21) and the second inner support plate (22) both having a first cavity (31) formed therein, one end of the first inner support plate (21) having a circular groove (28), and the second inner support plate (22) having a first cavity (31) formed therein One end of the inner support plate (22) is fixedly connected to a circular block (29), the circular groove (28) is snap-fitted with the circular block (29), one end of the inner support plate (21) is provided with a groove (25), one end of the inner support plate (22) is fixedly connected to a convex block (27), the convex block (27) and the groove (25) are used in conjunction with each other, and the ends of the inner support plate (21) and the inner support plate (22) that are away from each other are both provided with a connecting groove (26), and the connecting groove (26) is connected to the first cavity (31); The blocking assembly further comprises a plurality of No. 1 positioning rectangular blocks (13) fixedly connected to one side of the side splicing plate (3); a plurality of No. 1 positioning rectangular grooves (11) are provided on one side of the main splicing plate (4); the No. 1 positioning rectangular grooves (11) are snap-fitted with the No. 1 positioning rectangular blocks (13); a strip groove (18) is provided on one side of the side splicing plate (3); both sides of the middle splicing plate (2) are fixedly connected with strip plates (15); the strip plates (15) are used in conjunction with the strip grooves (18); A pouring hole (23) is provided on the top of the first inner support plate (21) and the second inner support plate (22), and the pouring hole (23) is connected to the first cavity (31). A second cavity (32) is provided on one side of the first inner support plate (21) and the second inner support plate (22), and a connecting hole (34) is provided between the second cavity (32) and the first cavity (31). A resistance plate (24) is slidably penetrated inside the second cavity (32), and a trapezoidal block (30) is slidably penetrated inside the connecting hole (34). The inclined surface of the trapezoidal block (30) cooperates with the resistance plate (24), and the trapezoidal block (30) is located directly below the pouring hole (23); Two number three positioning rectangular grooves (17) are symmetrically arranged on one side of the top of the middle splicing plate (2), a circular groove (16) is formed on the bottom inner wall of the number three positioning rectangular groove (17), a plurality of round rods (35) are fixedly connected to the bottom of the upper cover plate (5), a number three positioning rectangular block (19) is fixedly connected to one side of the number one inner support plate (21) and the number two inner support plate (22), a circular hole (20) is formed inside the number three positioning rectangular block (19), the circular hole (20) and the circular groove (16) are used in conjunction with the round rod (35), and the number three positioning rectangular groove (17) is used in conjunction with the number three positioning rectangular block (19).

2. The assembled core tube structure according to claim 1, characterized in that: A plurality of sealing rods (37) are fixedly connected to the bottom of the upper cover plate (5), and the sealing rods (37) are used in conjunction with the casting holes (23).

3. A construction method for an assembled core tube structure according to any one of claims 1 or 2, characterized in that: The specific steps include: S1, casting of prefabricated components: casting all required prefabricated components in advance, including a No. 1 inner support plate (21), a No. 2 inner support plate (22), a middle splicing plate (2), a side splicing plate (3), a main splicing plate (4) and an upper cover plate (5); S2. Install the main splicing plates (4): place four main splicing plates (4) at the top four corners of the core tube body (1), and complete the installation by positioning the cylindrical blocks (8) and the cylindrical grooves (10); S3, installing the side splicing plate (3): after the L-shaped plug (6) of the side splicing plate (3) is completely inserted into the first vertical groove (7), the side splicing plate (3) is moved horizontally so that the protruding portion of the L-shaped plug (6) enters the side groove (9), and at the same time, the first positioning rectangular groove (11) is engaged with the first positioning rectangular block (13); S4, installing the middle splicing plate (2): installing the middle splicing plate (2) from the top, inserting the strip plate (15) into the strip groove (18), and the blocking block (14) into the first vertical groove (7), filling the gap between the L-shaped plug block (6) and the first vertical groove (7); S5, installing the inner support plate: pre-connecting the first inner support plate (21) and the second inner support plate (22), then splicing them together into a rectangular frame, placing them between the main splicing plates (4), and fixing them through the third positioning rectangular block (19) and the third positioning rectangular groove (17); S6. Install the abutment plate (24): the trapezoidal block (30) falls under the action of gravity, enters the connecting hole (34), pushes the abutment plate (24) out, and abuts against the middle splicing plate (2) and the side splicing plate (3), thereby ensuring the connection stability; S7, pouring concrete: injecting concrete into the first cavity (31) through the pouring hole (23) to fill the gap between the second cavity (32) and the first cavity (31) to enhance structural stability; S8, installing the upper cover (5): installing the upper cover (5) in place, inserting the second positioning rectangular block (36) into the second positioning rectangular groove (12) for connection.

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