A quickly spliced assembly type cylindrical structure

Abstract

This invention relates to the field of civil engineering structural technology, specifically to a rapidly assembled prefabricated cylindrical structure, comprising a top-layer cylindrical component, at least one standard-layer cylindrical component, and a bottom-layer cylindrical component arranged sequentially from top to bottom. Each of the top-layer, standard-layer, and bottom-layer cylindrical components is assembled from multiple precast reinforced concrete cylindrical segments. These segments include several convex and concave cylindrical segments. Vertical grouting sleeves, annular steel pipes arranged circumferentially, and pre-reserved reinforcing bars extending from their upper surfaces are pre-embedded within the walls of both the convex and concave segments. This invention breaks down the overall cylindrical structure into standardized, miniaturized precast cylindrical segments, facilitating mass production in factories and conventional transportation. It significantly reduces reliance on prefabrication sites, specialized equipment, and hoisting conditions, making it suitable for various constrained engineering environments and enabling efficient, economical, and high-quality rapid assembly construction.

Description

Technical Field

[0001] This invention relates to the field of civil engineering structural technology, specifically to a prefabricated cylindrical structure that can be quickly assembled. Background Technology

[0002] Cylindrical structures, as a common type of gravity component, are widely used in marine or hydraulic structures such as docks, revetments, and breakwaters. They have advantages such as good load-bearing performance, high stability, and high material utilization efficiency.

[0003] Traditional construction methods typically involve prefabricating thin-walled reinforced concrete cylinders on shore. Once the required strength is achieved, these cylinders are transported to the design location using large floating cranes, airbags, or floating docks, and then placed on a riprap bed or directly sunk into the foundation. While this technology is mature, it is highly dependent on the allocation of construction resources.

[0004] However, due to the large diameter, height, and weight of cylindrical structures, they must be cast as a whole in a dedicated prefabrication yard with sufficient space and load-bearing capacity. This places high demands on the scale of the prefabrication site, the bearing capacity of the foundation, and the capacity of the lifting equipment. At the same time, the large size of the cylindrical shape and the inability to effectively utilize the internal cavity occupy a lot of space during land or water transportation, making them difficult to stack. This results in low efficiency and high cost for a single transport, and often requires multiple round trips. This problem is particularly prominent in remote coastal, offshore, or island projects with inconvenient transportation, weak infrastructure, or limited lifting capacity, which seriously restricts the promotion and application of cylindrical structures and construction efficiency. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention solves the technical problems of high requirements for prefabrication sites, low transportation efficiency, high cost and strong dependence on large hoisting equipment caused by the large size of the integral cylindrical structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a rapidly assembled prefabricated cylindrical structure, comprising a top-layer cylindrical component, at least one standard-layer cylindrical component, and a bottom-layer cylindrical component arranged sequentially from top to bottom. Each of the top-layer, standard-layer, and bottom-layer cylindrical components is assembled from multiple precast reinforced concrete cylindrical sections. Each cylindrical section includes several convex and concave sections. Vertical grouting sleeves, annular steel pipes arranged circumferentially, and pre-reserved reinforcing bars extending from their upper surfaces are pre-embedded within the walls of both the convex and concave sections. Adjacent convex and concave sections are joined by matching interlocking mortise and tenon joints. The components are joined together to form a single-layer cylinder. The two adjacent single-layer cylinders are connected by inserting and aligning the grouting sleeve of the upper single-layer cylinder with the reserved reinforcing bars of the lower single-layer cylinder. Grout is injected into the grouting sleeve to achieve interlayer connection. The annular steel pipe is joined end to end after the cylinder segments are spliced ​​to form a closed annular channel around the entire cylinder. Prestressing tendons are inserted into this annular channel and form a prestressed system after grouting. Tensioning operation holes and anchoring operation holes are respectively provided on the convex and concave cylinder segments. The tensioning operation holes and anchoring operation holes are sealed after the tensioning, anchoring and grouting of the prestressing tendons are completed.

[0007] Furthermore, the interlocking mortise and tenon structure includes a positioning key on the splicing end face of the convex cylindrical piece and a keyway on the splicing end face of the concave cylindrical piece, wherein the positioning key and the keyway match and interlock with each other.

[0008] Furthermore, in the two adjacent single-layer cylinders, the grouting sleeve of the upper single-layer cylinder is inserted into the reserved steel bar of the lower single-layer cylinder in a one-to-one correspondence. The grouting sleeve is a cylindrical component made of metal, with reserved holes on its side wall for grouting and venting, and its inner wall has rough texture to enhance the bonding performance with the grouting material.

[0009] Furthermore, the prestressing tendon is a steel strand, which is made of multiple high-strength steel wires twisted together. It is suitable for post-tensioning prestressing construction in annular ducts. After the steel strand is inserted into the closed annular duct formed by splicing annular steel pipes, it is tensioned through the tensioning operation hole and anchored at the anchoring operation hole. Then, the annular duct is pressure grouted so that the steel strand, the annular steel pipe and the surrounding concrete form an integral stress system.

[0010] Furthermore, the tensioning operation hole and the anchoring operation hole penetrate the inner and outer surfaces of the cylinder wall radially along the cylindrical plate, and the hole opening is provided with a detachable sealing cover plate. After grouting is completed, the hole opening is sealed with high-strength mortar.

[0011] Furthermore, the convex cylindrical plate of the top layer cylindrical component has a groove on its lower side, and the convex cylindrical plate of the standard layer cylindrical component has a positioning tenon on its upper side. The positioning tenon is inserted into the groove for vertical positioning of the upper and lower single-layer cylindrical components.

[0012] Furthermore, the outer end of the annular steel tube embedded in the convex cylindrical plate is provided with an upper arc-shaped baffle, and the outer end of the annular steel tube embedded in the concave cylindrical plate is provided with a lower arc-shaped baffle. The upper arc-shaped baffle is in contact with the outer wall of the annular steel tube in the concave cylindrical plate, and the lower arc-shaped baffle is in contact with the outer wall of the convex cylindrical plate. After the two arc-shaped baffles are in contact, a circular sealing structure is formed, which is used to seal the connection of adjacent annular steel tubes.

[0013] Furthermore, dovetail grooves are provided on the inner sides of the upper and lower arc-shaped baffles, and dovetail blocks are provided on the outer wall of the annular steel pipe to match them. The dovetail blocks and dovetail grooves are inserted and matched to achieve a reliable connection between the arc-shaped baffles and the annular steel pipe.

[0014] Furthermore, the upper arc-shaped baffle is fixedly provided with positioning arc blocks on both sides, and the lower arc-shaped baffle is symmetrically provided with mounting grooves on both sides. Two elastic fasteners are provided in the mounting grooves, and the two elastic fasteners form a semi-circular buckle structure. The positioning arc blocks are fastened between the two elastic fasteners to achieve quick locking of the upper and lower arc-shaped baffles.

[0015] Furthermore, after the adjacent cylindrical pieces are spliced ​​together, the arc-shaped baffle covers the end joint of the annular steel pipe. After the upper and lower arc-shaped baffles are vertically aligned and locked, they together with the outer wall of the annular steel pipe to form a sealed chamber. This sealed chamber is connected to the annular channel during grouting, so that the grout fills the gaps on the inner side of the arc-shaped baffle, thereby preventing grout leakage and enhancing the sealing and integrity of the annular steel pipe connection node.

[0016] Beneficial effects 1. The technical solution provided by this invention decomposes the traditional integral cylindrical structure into multiple standardized and miniaturized prefabricated cylindrical segments, which can be mass-produced in ordinary prefabrication plants without the need for large special platforms or heavy lifting equipment. This significantly reduces the requirements for the scale of the prefabrication site and infrastructure. At the same time, the cylindrical segments are small in size and regular in shape, making them easy to stack or compactly load, which greatly improves the utilization rate of transportation space, reduces transportation frequency and cost, and can be transported by conventional vehicles or ships without relying on special ship machinery equipment. It is particularly suitable for docks, revetments or offshore engineering sites with inconvenient transportation and limited lifting capacity, so as to achieve efficient, economical and high-quality rapid assembly and construction.

[0017] 2. This invention achieves radial limiting and reliable connection between the baffle and the steel pipe by setting upper and lower matching arc-shaped baffles at the end of the annular steel pipe, combined with the dovetail groove and dovetail block insertion structure. This effectively prevents the baffle from misaligning or falling off during assembly. Simultaneously, the positioning arc blocks on both sides of the upper arc-shaped baffle and the elastic fasteners in the mounting groove of the lower arc-shaped baffle form a self-locking snap-fit ​​mechanism. This not only enables rapid alignment, pressing, and locking of the upper and lower baffles without tools, significantly improving on-site assembly efficiency, but also, while vertically locking, it also locks adjacent convex cylindrical pieces and... The concave cylindrical segments form a lateral constraint, further enhancing the connection stability between the segments along the circumferential and radial directions. More importantly, after splicing, this combined structure, together with the outer wall of the annular steel pipe, forms a sealed cavity. During the grouting of the annular duct, the grout is filled simultaneously, effectively sealing the steel pipe joints, preventing grout leakage, and ensuring that the prestressed duct grouting is full and dense. This significantly improves the sealing, integrity, impermeability, and long-term durability of the joint area, thus systematically solving the technical problems of easy grout leakage, weak connection, and insufficient inter-segment stability in precast cylinders during prestressing and grouting. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the overall structure of the present invention broken down; Figure 3 This is a schematic diagram showing the disassembled top cylindrical component of the present invention; Figure 4 This is a schematic diagram of the convex cylindrical plate of the top cylindrical component of the present invention; Figure 5 This is a schematic diagram of the concave cylindrical sheet of the top cylindrical component of the present invention; Figure 6 This is a schematic diagram of the convex cylindrical sheet of the standard layer cylindrical component of the present invention; Figure 7 This is a schematic diagram of the convex cylindrical piece of the bottom cylindrical component of the present invention; Figure 8 This is a schematic diagram of the arc-shaped baffle structure of the present invention.

[0020] Reference numerals: 1. Top layer cylindrical component; 2. Standard layer cylindrical component; 3. Bottom layer cylindrical component; 4. Convex cylindrical piece; 5. Concave cylindrical piece; 6. Keyway; 7. Positioning key; 8. Annular steel pipe; 9. Reserved reinforcing bar; 10. Grouting sleeve; 11. Reserved hole; 12. Tensioning operation hole; 13. Anchoring operation hole; 14. Groove; 15. Positioning tenon; 16. Arc-shaped baffle; 17. Dovetail groove; 18. Dovetail block; 19. Positioning arc block; 20. Installation groove; 21. Elastic fastener. Detailed Implementation

[0021] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments.

[0023] See attached document Figure 1-8 A prefabricated cylindrical structure that can be quickly assembled consists of a top cylindrical component 1, at least one standard cylindrical component 2, and a bottom cylindrical component 3 connected sequentially from top to bottom.

[0024] Based on the total height of the cylinder required for the project, one or more standard layer cylinders 2 can be set between the top layer cylinder 1 and the bottom layer cylinder 3 to achieve flexible adjustment of the structural height. Each layer cylinder is assembled from multiple prefabricated reinforced concrete cylinder pieces, which include two types: convex cylinder pieces 4 and concave cylinder pieces 5.

[0025] The overall diameter of the cylinder can be designed according to engineering requirements. Accordingly, a single-layer cylinder is formed by alternating splicing of several pairs of convex cylindrical plates 4 and concave cylindrical plates 5 along the circumference. The larger the diameter, the more cylindrical plates are required, and the smaller the diameter, the fewer the number are required, thereby achieving modular adaptation to engineering application scenarios of different scales.

[0026] like Figure 3 As shown, convex cylindrical plates 4 and concave cylindrical plates 5 are arranged alternately along the circumference and are spliced ​​together into a complete single-layer cylinder through a matching concave-convex interlocking structure.

[0027] Specifically, during the factory prefabrication stage, the following key components are pre-embedded in the cylinder wall of each convex cylindrical piece 4 and concave cylindrical piece 5: several vertically arranged grouting sleeves 10, annular steel pipes 8 arranged in the arc direction, and reserved steel bars 9 extending from the upper end face of the cylindrical piece. The grouting sleeves 10 are pre-embedded in the bottom of the cylindrical piece, and their upper ends open to the lower end face of the cylindrical piece, while the reserved steel bars 9 extend vertically upward from the upper end face of the same cylindrical piece.

[0028] The convex cylindrical piece 4 has an outwardly protruding positioning key 7 on its splicing end face, while the concave cylindrical piece 5 has a matching keyway 6 on its corresponding splicing end face. During on-site assembly, the positioning key 7 of the convex cylindrical piece 4 is inserted into the keyway 6 of the adjacent concave cylindrical piece 5 to form a reliable horizontal mortise and tenon connection, thereby achieving rapid and precise enclosure of a single-layer cylinder.

[0029] After the single-layer cylinder assembly is completed, the vertical connection between the upper and lower layers is carried out. The specific operation is as follows: the grouting sleeve 10 pre-embedded at the bottom of the upper single-layer cylinder is aligned and inserted into the reserved steel bar 9 extending from the top of the lower single-layer cylinder. The grouting sleeve 10 is a cylindrical component made of metal. Its inner wall has rough texture to enhance the adhesion with the grout. The side wall also has reserved holes 11 for grouting and venting. After all the reserved steel bars 9 are inserted and aligned with the grouting sleeve 10, high-strength grout is injected through the reserved holes 11, so that the upper and lower cylinders form a firm integral connection after the grout has solidified.

[0030] Meanwhile, the annular steel pipes 8 embedded in each cylindrical segment are spliced ​​together in the circumferential direction to form a closed annular channel around the entire cylinder. This annular channel is used to insert prestressing tendons, which are preferably multi-strand high-strength steel strands. During the prefabrication of the convex cylindrical segment 4 and the concave cylindrical segment 5, tensioning operation holes 12 and anchoring operation holes 13 are respectively opened on their cylinder walls, penetrating the inner and outer surfaces radially. The positions of the tensioning operation holes 12 and the anchoring operation holes 13 are precisely aligned with the annular steel pipes 8 embedded in their respective cylindrical segments and are connected to the cavity of the annular steel pipes 8 inside. That is, one end of the tensioning operation hole 12 opens into the outer wall of the cylinder, and the other end directly enters the cavity of the annular steel pipe 8 contained in the convex cylindrical segment 4. Similarly, one end of the anchoring operation hole 13 opens into the outer wall of the cylinder, and the other end enters the cavity of the annular steel pipe 8 contained in the concave cylindrical segment 5, thereby providing a channel for the prestressing tendons to pass through, be tensioned, and anchored.

[0031] After the prestressing tendons are installed, one end is led out from the tensioning operation hole 12 to the outside of the cylinder and connected to the tensioning jack for tensioning. The other end is led out from the anchoring operation hole 13 and anchorage such as a wedge anchor or upset head anchor is installed on the outside of the cylinder for fixing and anchoring. The openings of the tensioning operation hole 12 and the anchoring operation hole 13 are equipped with removable sealing covers for dust and water protection during non-construction stages.

[0032] After the prestressing tendons are tensioned and anchored according to the design requirements, pressure grouting is performed on the entire closed annular duct through the tensioning operation hole 12, the anchoring operation hole 13, or the special grouting port on the annular steel pipe 8. This allows the cement-based grouting material to fully fill the gap between the prestressing tendons and the annular steel pipe 8, and to wrap the anchorage area. Ultimately, the prestressing tendons, the annular steel pipe 8, and the surrounding concrete form a cohesive prestressed system. After grouting is completed, the sealing cover is removed, and high-strength non-shrink mortar is used to seal the tensioning operation hole 12 and the anchoring operation hole 13 layer by layer from the outside to the inside, restoring the integrity of the cylinder wall and ensuring long-term durability.

[0033] To further improve the vertical positioning accuracy of the upper and lower cylinders, a groove 14 is provided on the lower side of the convex cylindrical plate 4 of the top layer cylinder 1, and a matching positioning tenon 15 is provided on the upper side of the convex cylindrical plate 4 of the standard layer cylinder 2. During installation, the positioning tenon 15 is inserted into the groove 14 of the upper layer to achieve preliminary alignment and positioning between the upper and lower layers.

[0034] In particular, to solve the problem of easy grout leakage at the splice of the annular steel pipe 8, the present invention provides a sealing structure at the end of the annular steel pipe 8. The sealing structure is an upper arc-shaped baffle 16 fixed to the outer end of the annular steel pipe 8 contained in the convex cylindrical plate 4, and an lower arc-shaped baffle 16 fixed to the outer end of the annular steel pipe 8 contained in the concave cylindrical plate 5.

[0035] After the cylindrical pieces are spliced ​​together, the upper and lower arc-shaped baffles 16 fit together and cover the joint of the adjacent annular steel pipes 8. To ensure a reliable connection between the arc-shaped baffles 16 and the annular steel pipes 8, dovetail blocks 18 are provided on the outer wall of the annular steel pipes 8, and dovetail grooves 17 are provided on the inner side of the arc-shaped baffles 16 at the corresponding positions. Through the insertion and cooperation of the dovetail blocks 18 and the dovetail grooves 17, the radial positioning and stable installation of the arc-shaped baffles 16 on the annular steel pipes 8 are achieved.

[0036] Furthermore, positioning arc blocks 19 are fixedly provided on both sides of the upper arc baffle 16, and mounting grooves 20 are symmetrically opened on both sides of the lower arc baffle 16. Each mounting groove 20 is provided with two oppositely arranged elastic fasteners 21, which together form a semi-circular snap-fit ​​structure. When the upper and lower arc baffles 16 are aligned and pressed together, the positioning arc blocks 19 of the upper layer are pressed into the two elastic fasteners 21 of the lower layer, and automatic locking is achieved by elastic deformation, forming a self-locking snap-fit ​​mechanism that can be quickly assembled without tools. This structure not only facilitates on-site operation, but also effectively improves the overall stability of the convex cylindrical piece 4 and the concave cylindrical piece 5 after splicing.

[0037] Finally, after the upper and lower arc-shaped baffles 16 are locked, they together with the outer wall of the annular steel pipe 8 form a sealed chamber. This sealed chamber is connected to the main channel during the grouting process of the annular channel. The grout flows into the inner gap of the arc-shaped baffles 16 synchronously, fully filling the joint area, thereby effectively preventing grout leakage and ensuring full and dense grouting. This significantly improves the sealing, integrity, impermeability and long-term durability of the joint area, and solves the technical problems of easy grout leakage and weak connection in traditional prefabricated cylinders during prestressing and grouting.

[0038] In summary, firstly, the top-layer cylindrical component 1, several standard-layer cylindrical components 2, and the bottom-layer cylindrical component 3 are prefabricated in the factory. Each layer consists of multiple convex cylindrical pieces 4 and concave cylindrical pieces 5. Each cylindrical piece has a pre-embedded bottom grouting sleeve 10, a pre-reserved top reinforcing bar 9, and an annular steel pipe 8 arranged along the arc length. Tensioning operation holes 12 or anchoring operation holes 13 connected to the annular steel pipe 8 are opened on the cylinder wall. During on-site installation, the convex cylindrical pieces 4 and concave cylindrical pieces 5 of the same layer are first engaged with the keyway 6 through the positioning protrusion 7 to form a complete single-layer cylinder. Then, the next layer of cylinder is hoisted so that the bottom grouting sleeve 10 is accurately fitted onto the pre-reserved reinforcing bar 9 at the top of the next layer, and the positioning protrusion 15 and the groove 14 are used to achieve preliminary alignment.

[0039] Next, prestressed steel strands are threaded around the entire cylinder. One end is led out from the tensioning operation hole 12 for tensioning, and the other end is led out from the anchoring operation hole 13 for anchoring. After tensioning, pressure grouting is performed on the closed annular duct through the operation hole or a special grouting port, so that the prestressed tendons, annular steel pipe 8 and concrete form an integral force system. At the same time, the upper and lower arc-shaped baffles 16 at the ends of the adjacent cylindrical annular steel pipe 8 achieve self-locking and compression sealing through the cooperation of dovetail grooves 17, dovetail blocks 18 and elastic fasteners 21. The enclosed sealed cavity is filled synchronously during grouting, effectively preventing grout leakage. Finally, the sealing cover plate of the operation hole is removed, and the hole is sealed with high-strength mortar to complete the structural assembly.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated cylindrical structure that can be quickly assembled, characterized in that, The system comprises a top-layer cylindrical component (1), at least one standard-layer cylindrical component (2), and a bottom-layer cylindrical component (3) arranged sequentially from top to bottom. Each of the top-layer cylindrical component (1), standard-layer cylindrical component (2), and bottom-layer cylindrical component (3) is assembled from multiple precast reinforced concrete cylindrical pieces. Each cylindrical piece includes several convex cylindrical pieces (4) and concave cylindrical pieces (5). The convex cylindrical pieces (4) and concave cylindrical pieces (5) are each pre-embedded with vertical grouting sleeves (10), annular steel pipes (8) arranged along the circumference, and reserved reinforcing bars (9) extending from their upper end faces. Adjacent convex cylindrical pieces (4) and concave cylindrical pieces (5) are joined together by a matching mortise and tenon joint structure. The upper and lower adjacent single-layer cylinders are connected by interlocking and aligning the grouting sleeve (10) of the upper single-layer cylinder with the reserved steel bar (9) of the lower single-layer cylinder. Grout is injected into the grouting sleeve (10) to achieve interlayer connection. The annular steel pipe (8) is connected end to end after the cylinder pieces are spliced ​​to form a closed annular channel around the entire cylinder. Prestressed tendons are inserted in the annular channel and form a prestressed system after grouting. Tensioning operation holes (12) and anchoring operation holes (13) are respectively provided on the convex cylinder piece (4) and the concave cylinder piece (5). The tensioning operation holes (12) and the anchoring operation holes (13) are sealed after the tensioning, anchoring and grouting of the prestressed tendons are completed.

2. The prefabricated cylindrical structure that can be quickly assembled according to claim 1, characterized in that, The mortise and tenon structure includes a positioning key (7) on the splicing end face of the convex cylindrical piece (4) and a keyway (6) on the splicing end face of the concave cylindrical piece (5). The positioning key (7) and the keyway (6) match and engage with each other.

3. The prefabricated cylindrical structure that can be quickly assembled according to claim 2, characterized in that, In the two adjacent single-layer cylinders, the grouting sleeve (10) of the upper single-layer cylinder and the reserved steel bar (9) of the lower single-layer cylinder are inserted one by one. The grouting sleeve (10) is a cylindrical component made of metal. Its side wall is provided with reserved holes (11) for grouting and venting, and its inner wall is provided with rough texture to enhance the bonding performance with the grouting material.

4. The prefabricated cylindrical structure that can be quickly assembled according to claim 1, characterized in that, The prestressing tendon is a steel strand, which is made of multiple high-strength steel wires twisted together. It is suitable for post-tensioning prestressing construction in annular ducts. After the steel strand is inserted into the closed annular duct formed by splicing annular steel pipes (8), it is tensioned through the tensioning operation hole (12) and anchored at the anchoring operation hole (13). Then, the annular duct is pressure grouted so that the steel strand, annular steel pipes (8) and surrounding concrete form an integral stress system.

5. The prefabricated cylindrical structure that can be quickly assembled according to claim 1, characterized in that, The tensioning operation hole (12) and the anchoring operation hole (13) penetrate the inner and outer surfaces of the cylinder wall radially along the cylindrical plate. The opening is equipped with a detachable sealing cover plate. After grouting is completed, the opening is sealed with high-strength mortar.

6. The prefabricated cylindrical structure that can be quickly assembled according to claim 5, characterized in that, The convex cylindrical piece (4) of the top layer cylindrical piece (1) has a groove (14) on its lower side, and the convex cylindrical piece (4) of the standard layer cylindrical piece (2) has a positioning tenon (15) on its upper side. The positioning tenon (15) and the groove (14) are inserted and matched for vertical positioning of the upper and lower single-layer cylindrical pieces.

7. The prefabricated cylindrical structure that can be quickly assembled according to claim 1, characterized in that, The outer end of the annular steel pipe (8) embedded in the convex cylindrical plate (4) is provided with an upper arc-shaped baffle (16), and the outer end of the annular steel pipe (8) embedded in the concave cylindrical plate (5) is provided with a lower arc-shaped baffle (16). The upper arc-shaped baffle (16) is in contact with the outer wall of the annular steel pipe (8) in the concave cylindrical plate (5), and the lower arc-shaped baffle (16) is in contact with the outer wall of the convex cylindrical plate (4). After the two arc-shaped baffles (16) are in contact, a circular sealing structure is formed, which is used to seal the connection of adjacent annular steel pipes (8).

8. The prefabricated cylindrical structure that can be quickly assembled according to claim 7, characterized in that, The inner sides of the upper and lower arc-shaped baffles (16) are provided with dovetail grooves (17), and the outer wall of the annular steel pipe (8) is provided with matching dovetail blocks (18). The dovetail blocks (18) and the dovetail grooves (17) are inserted and matched to achieve a reliable connection between the arc-shaped baffles (16) and the annular steel pipe (8).

9. A prefabricated cylindrical structure capable of rapid assembly according to claim 8, characterized in that, The upper arc-shaped baffle (16) is fixed with positioning arc blocks (19) on both sides. The lower arc-shaped baffle (16) is symmetrically provided with mounting grooves (20) on both sides. Two elastic fasteners (21) are provided in the mounting grooves (20). The two elastic fasteners (21) form a semi-circular buckle structure. The positioning arc blocks (19) are fastened between the two elastic fasteners (21) to achieve quick locking of the upper and lower arc-shaped baffles (16).

10. A prefabricated cylindrical structure capable of rapid assembly according to claim 9, characterized in that, The arc-shaped baffle (16) covers the end joint of the annular steel pipe (8) after the adjacent cylindrical pieces are spliced. After the upper and lower arc-shaped baffles (16) are vertically aligned and locked, they together with the outer wall of the annular steel pipe (8) to form a sealed chamber. The sealed chamber is connected to the annular channel during grouting, so that the grout fills the gap inside the arc-shaped baffle (16), thereby preventing the grout from leaking out and enhancing the sealing and integrity of the connection node of the annular steel pipe (8).

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