Prefabricated reinforced concrete column joint connecting device

Abstract

The invention discloses a prefabricated reinforced concrete column joint connecting device, which belongs to the technical field of constructional engineering, and comprises an upper prefabricated concrete column and a lower prefabricated concrete column, the upper prefabricated main reinforcement is fixedly connected to the interior of the upper prefabricated concrete column; and the bottom of the upper prefabricated main reinforcement extends to the lower end of the upper prefabricated concrete column. According to the hoisting device, self-centering is achieved, and the hoisting efficiency is greatly improved. And a spherical hinge structure formed by the spherical washer and the concave washer allows the upper column to have a tiny inclination degree of freedom before locking, so that a worker can conveniently carry out macroscopic leveling, and finally, the spherical hinge can be compressed by screwing a single nut, a gap is eliminated, and rigid connection is completed. According to the scheme, wet operation such as welding or grouting is not needed in the whole process, the construction speed is high, the quality controllability is high, and a stable and reliable foundation connecting platform is provided for subsequent prestress or shear strength enhancement.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and more specifically, to a precast reinforced concrete column joint connection device. Background Technology

[0002] Reinforced concrete columns are columns made of reinforced concrete. They are the most basic load-bearing components in various engineering structures such as buildings, bridges, and water systems, and are commonly used as columns in floor slabs, bridge piers, foundation columns, and compression members in towers and trusses. Based on manufacturing and construction methods, they are divided into precast columns and cast-in-place columns. Cast-in-place reinforced concrete columns have good overall integrity, but require a large amount of formwork work. Precast reinforced concrete columns are easier to construct, but the quality of joint connections must be ensured.

[0003] For example, Chinese Patent Publication No. CN112761307A discloses the following technical solution: a precast reinforced concrete column joint connection device, including an upper precast column body, multiple upper precast column main reinforcement bars are fixedly connected inside the upper precast column body, a steel column shoe body is fixedly connected to the bottom of the upper precast column main reinforcement bars, the steel column shoe body includes a steel column shoe upper cover plate, the steel column shoe upper cover plate is fixedly welded to the bottom of the upper precast column main reinforcement bars, a steel column shoe inner stiffening rib is fixedly connected to the bottom of the steel column shoe upper cover plate, a steel column shoe lower bottom plate is fixedly connected to the bottom of the steel column shoe inner stiffening rib, multiple reserved bolt holes are opened on the lower bottom plate of the steel column shoe, and multiple steel column shoe stiffening ribs are fixedly connected to the side wall of the steel column shoe inner stiffening rib.

[0004] The existing technology has the following problems: The aforementioned device requires extremely high precision in the splicing of reinforcing bars during the hoisting of precast columns. Any positional deviation will make it difficult to accurately splice the reinforcing bars, severely impacting construction efficiency and increasing construction time and costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a precast reinforced concrete column joint connection device, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this application provides a precast reinforced concrete column joint connection device, comprising: an upper precast concrete column and a lower precast concrete column; an upper precast main reinforcement bar, which is fixedly connected to the interior of the upper precast concrete column; and the bottom of the upper precast main reinforcement bar extends to the lower end of the upper precast concrete column; and a lower precast main reinforcement bar, which is fixedly connected to the interior of the lower precast concrete column; and the bottom of the lower precast main reinforcement bar extends to the upper end of the lower precast concrete column. The bottom of the upper precast main reinforcement is fixedly connected to a steel column shoe upper cover plate, the bottom of the steel column shoe upper cover plate is fixedly connected to a reinforcing plate, the bottom of the reinforcing plate is fixedly connected to a steel column shoe lower cover plate, the top of the lower precast main reinforcement is fixedly connected to a threaded rod, the bottom of the steel column shoe lower cover plate is fixedly connected to a tapered guide sleeve, the outer wall of the threaded rod is movably fitted with a concave washer and a spherical washer, the outer wall of the threaded rod is threaded with a fastening nut, and the outer wall of the lower precast main reinforcement is fixedly fitted with a limiting ring.

[0007] Preferably, the lower part of the tapered guide sleeve is a tapered flared opening, and the upper part is a cylindrical inner hole.

[0008] Preferably, the concave surface of the concave washer perfectly matches the convex surface of the spherical washer, and the other side of both the concave washer and the spherical washer are flat, with the flat side of the concave washer facing downwards and tightly attached to the steel base plate.

[0009] Preferably, the number of tapered guide sleeves is exactly the same as the number of lower precast main ribs and threaded rods.

[0010] Preferably, a prestressing assembly is provided on the inner side of the upper and lower precast concrete columns. The prestressing assembly includes a circular channel located in the middle of the upper and lower precast concrete columns. A steel strand is arranged inside the circular channel. A connecting ring is fixedly connected to the bottom of the steel strand. A connecting rod is sleeved in the middle of the connecting ring. A steel rod is fixedly connected to the bottom of the connecting rod. Slanted grooves are provided on both sides of the steel rod. A slider is provided inside the slanted grooves. A clamping anchor is slidably sleeved on the outer wall of the upper end of the steel strand. A threaded shaft is fixedly connected to the top of the upper precast concrete column. A movable plate is movably sleeved on the outer wall of the threaded shaft. A limit tube is fixedly connected to the upper end of the movable plate. A limit nut is threadedly sleeved on the outer wall of the threaded shaft.

[0011] Preferably, the inner wall of the inclined groove is fixedly connected to a slide rail, the slider is slidably connected to the outer wall of the slide rail, and the outer wall of the slider is provided with friction texture. The lower end of the circular channel is slightly narrower than the upper end.

[0012] Preferably, the inner diameter of the limiting tube is larger than the lower diameter of the clamp anchor and smaller than the upper diameter of the clamp anchor.

[0013] Preferably, the upper end of the lower cover plate of the steel column shoe is provided with a shear-resistant component, the shear-resistant component includes a shear-resistant groove, the shear-resistant groove is opened at the top of the lower precast concrete column, the inner side of the lower cover plate of the steel column shoe is slidably connected with a shear key and a lifting shaft, the upper end of the lower cover plate of the steel column shoe is slidably connected with a moving block, the outer wall of the moving block is provided with an inclined groove, the side of the shear key is fixedly connected with a sliding shaft, the end of the sliding shaft away from the moving block is slidably connected to the inside of the inclined groove, and the top of the lifting shaft is fixedly connected with a push block.

[0014] Preferably, one side of the push block is attached to one side of the moving block, and the surfaces of the push block and the moving block that are attached are both set as inclined surfaces.

[0015] Preferably, a spring is fixedly connected to the side of the moving block away from the push block, and the other end of the spring is fixedly connected to the reinforcing plate.

[0016] The advantages of this application are: (1) This application solves the two major construction problems of "precise centering" and "fine-tuning leveling" in the connection of precast column nodes efficiently and reliably through a purely mechanical combination of "conical guide sleeve" and "spherical hinge washer". The flared design of the conical guide sleeve greatly reduces the accuracy requirements of the steel bar connection during hoisting, realizes "self-centering", and greatly improves hoisting efficiency. The spherical hinge structure formed by the spherical washer and the concave washer allows the upper column to have a small degree of tilt freedom before locking, which is convenient for workers to perform macro-leveling. Finally, the spherical hinge can be pressed by tightening a single nut, eliminating gaps and completing rigid connection. The entire process of this solution does not require welding or grouting or other wet operations, the construction speed is fast, the quality is highly controllable, and it provides a stable and reliable basic connection platform for subsequent prestressing or shear reinforcement.

[0017] (2) This application introduces a "central prestressing component," which actively applies prestress to the node by tensioning the steel strands, fundamentally improving the tensile performance, overall stiffness, and seismic resistance of the node. Its innovative "inclined slider" fixed-end anchoring mechanism cleverly transforms the concentrated tension of the steel strands into radial pressure on the concrete, effectively avoiding stress concentration and protecting the concrete. The upper limiting tube cooperates with the wedge anchor to ensure the reliability of the anchoring after tensioning. This system transforms the node from a "hinged" state that can only withstand pressure to a "rigid" state that can reliably resist bending moment and tension, significantly enhancing the integrity and safety of the structure under horizontal loads such as strong winds and earthquakes.

[0018] (3) This application incorporates a shear-resistant component, enabling automatic start / stop and efficient switching of the shear-resistant function, significantly improving the shear bearing capacity of the node. When the fastening nut is tightened, the lifting shaft is driven by the reaction force to move the push block upwards, which in turn drives the moving block to slide through the inclined plane, thereby driving the shear key to insert into the shear groove. This quickly forms a horizontal shear force transmission path, preventing relative slippage of the node under earthquakes, wind loads, etc., and ensuring structural stability and safety. The elastic reset function of the spring allows the shear key to be automatically extracted after the nut is loosened, facilitating the separation of the upper column during hoisting, and realizing the detachability and reusability of the connection device. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a front cross-sectional view of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the present invention. Figure 2 ; Figure 6 This is a side cross-sectional view of the present invention; Figure 7 This is the invention Figure 6 Enlarged structural diagram at point B.

[0020] In the above image, 1. Upper precast concrete column; 2. Lower precast concrete column; 3. Upper precast main reinforcement; 4. Lower precast main reinforcement; 51. Upper cover plate of steel column shoe; 52. Ribbed plate; 53. Lower cover plate of steel column shoe; 54. Threaded rod; 55. Conical guide sleeve; 56. Concave washer; 57. Spherical washer; 58. Fastening nut; 59. Limiting ring; 6. Preload assembly; 61. Circular channel; 62. Steel strand; 63. 64. Connecting ring; 65. Connecting rod; 66. Steel rod; 67. Inclined groove; 68. Sliding block; 69. Slide rail; 60. Clamping anchor; 610. Threaded shaft; 611. Moving plate; 612. Limiting tube; 613. Limiting nut; 7. Shear-resistant assembly; 71. Shear-resistant groove; 72. Shear-resistant key; 73. Moving block; 74. Inclined groove; 75. Slide shaft; 76. Push block; 77. Lifting shaft; 78. Spring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1, please refer to Figures 1-7This embodiment provides a precast reinforced concrete column joint connection device, including: an upper precast concrete column 1 and a lower precast concrete column 2; an upper precast main reinforcement 3, which is fixedly connected to the interior of the upper precast concrete column 1; and the bottom of the upper precast main reinforcement 3 extends to the lower end of the upper precast concrete column 1; a lower precast main reinforcement 4, which is fixedly connected to the interior of the lower precast concrete column 2; and the bottom of the lower precast main reinforcement 4 extends to the lower ends of both the upper and lower precast concrete columns 2. The bottom of the upper precast main reinforcement 3 is fixedly connected to a steel column shoe upper cover plate 51. The bottom of the steel column shoe upper cover plate 51 is fixedly connected to a reinforcing plate 52. The bottom of the reinforcing plate 52 is fixedly connected to a steel column shoe lower cover plate 53. The top of the lower precast main reinforcement 4 is fixedly connected to a threaded rod 54. The bottom of the steel column shoe lower cover plate 53 is fixedly connected to a conical guide sleeve 55. The outer wall of the threaded rod 54 is movably fitted with a concave washer 56 and a spherical washer 57. The outer wall of the threaded rod 54 is threaded with a fastening nut 58. The outer wall of the lower precast main reinforcement 4 is fixedly fitted with a limiting ring 59. The lower part of the conical guide sleeve 55 is a conical flared mouth, and the upper part is a cylindrical inner hole. The lower part of the conical guide sleeve 55 is designed in the shape of a conical flared mouth. This structure can effectively guide objects or fluids into the interior.

[0028] The concave surface of the concave washer 56 perfectly matches the convex surface of the spherical washer 57. The other side of both the concave washer 56 and the spherical washer 57 are flat, with the flat side of the concave washer 56 facing down and tightly attached to the steel base plate. This design ensures the stability of the overall structure and the uniformity of the force distribution, while also facilitating quick and accurate positioning during installation.

[0029] The number of tapered guide sleeves 55 is exactly the same as the number of lower precast main reinforcement bars 4 and threaded rods 54. Each tapered guide sleeve 55 corresponds precisely to one lower precast main reinforcement bar 4 and one threaded rod 54, thereby ensuring the accuracy and stability of the structural connection.

[0030] In use, the bottom of the upper precast main reinforcement 3 is fixed to the upper cover plate 51 of the steel column shoe. Then, the rib plate 52 and the lower cover plate 53 of the steel column shoe are welded to form a complete "steel column shoe". Finally, the reinforcement is tied, the formwork is erected, and concrete is poured to form the upper precast concrete column 1. When pouring the lower precast concrete column 2, the top of the lower precast main reinforcement 4 extends a certain length beyond the top surface of the column, and a threaded rod 54 is processed at its end. The upper precast concrete column 1 is lifted by a crane, moved to directly above the lower precast concrete column 2, and the upper precast concrete column 1 is slowly lowered. At this time, the flared opening of the tapered guide sleeve 55 welded to the lower cover plate 53 of the steel column shoe can guide the threaded rod 54 at the top of the lower precast main reinforcement 4, preventing the threaded rod 54 from failing to accurately pass through the lower cover plate 53 of the steel column shoe due to positional deviation during the fall of the upper precast concrete column 1. Even if there is a large deviation in the initial alignment, the inclined wall of the tapered guide sleeve 55 can automatically guide the threaded rod 54 to slide into the cylindrical inner hole in its center to achieve self-alignment. After the threaded rod 54 passes through the lower cover plate 53 of the steel column shoe, the concave washer 56 and the spherical washer 57 are put on in sequence. Through the cooperation of the concave washer 56 and the spherical washer 57, since the concave washer 56 and the spherical washer 57 can slide against each other, a "spherical hinge" is formed. This spherical hinge allows the upper column to have a small degree of freedom of tilt when it is not locked. Then, the worker can use a level to measure the verticality of the upper column. By inserting steel wedges and other tools into the bottom of the column, the overall level of the upper column is macroscopically adjusted to ensure the tightness and stability of the connection. After leveling, the worker uses a torque wrench to tighten the fastening nut 58. The nut rotates downward, generating a huge clamping force that presses the spherical washer 57 and the concave washer 56 tightly together. The strong friction instantly locks the ball joint, fixing the leveled angle. The limiting ring 59 provides support for the conical guide sleeve 55. The gap between the bottom surface of the steel column shoe cover plate 53 and the top surface of the lower precast concrete column 2 will be filled later by injecting non-shrink grout. This grout has good fluidity, can tightly fill the gap and firmly bond with the concrete and steel components, further enhancing the integrity and load-bearing capacity of the joint, avoiding stress concentration caused by the gap, and improving the durability and seismic performance of the connection device.

[0031] Example 2, please refer to Figures 1-7 Based on Embodiment 1, a prestressing component 6 is provided on the inner side of the upper precast concrete column 1 and the lower precast concrete column 2. The prestressing component 6 includes a circular channel 61, which is located in the middle of the upper precast concrete column 1 and the lower precast concrete column 2. A steel strand 62 is provided inside the circular channel 61. A connecting ring 63 is fixedly connected to the bottom of the steel strand 62. A connecting rod 64 is sleeved in the middle of the connecting ring 63. A steel rod 65 is fixedly connected to the bottom of the connecting rod 64. Inclined grooves 66 are provided on both sides of the steel rod 65. A slider 67 is provided inside the inclined grooves 66. A clamp anchor 69 is slidably sleeved on the outer wall of the upper end of the steel strand 62. A threaded shaft 610 is fixedly connected to the top of the upper precast concrete column 1. A movable plate 611 is movably sleeved on the outer wall of the threaded shaft 610. A limit tube 612 is fixedly connected to the upper end of the movable plate 611. A limit nut 613 is threadedly sleeved on the outer wall of the threaded shaft 610.

[0032] The inner wall of the inclined groove 66 is fixedly connected to the slide rail 68, and the slider 67 is slidably connected to the outer wall of the slide rail 68. The outer wall of the slider 67 is provided with friction texture. The lower end of the circular channel 61 is slightly narrower than the upper end. The friction texture can increase the friction between the slider 67 and the contact surface, thereby improving its stability and performance.

[0033] The inner diameter of the limiting tube 612 is larger than the lower diameter of the clamping anchor 69 and smaller than the upper diameter of the clamping anchor 69. It is larger than the lower diameter of the clamping anchor 69 to ensure that the clamping anchor 69 can pass smoothly through the limiting tube 612; at the same time, it is smaller than the upper diameter of the clamping anchor 69 to achieve effective restriction and positioning of the clamping anchor 69.

[0034] In use, after the upper precast concrete column 1 and the lower precast concrete column 2 are connected, the steel strand 62 and the steel rod 65 at its bottom, which is fixedly connected by the connecting ring 63 and the connecting rod 64, are placed into the centrally reserved circular channel 61. The sliders 67 that slide in the inclined grooves 66 on both sides of the steel rod 65 and slide against the outer wall of the slide rail 68 will initially slide down to the lower side of the inclined grooves 66 under the action of gravity. When the steel ball is put into the circular channel 61 until it slides down to the lower precast concrete column 2, the sliders 67 on both sides will contact the inner wall of the circular channel 61, and thus move upward along the slide rail 68 until the top of the slider 67 moves to the top of the inclined groove 66 and contacts it. At this time, the surface slider 67 is completely in contact with the inner wall of the circular channel 61. At this time, the steel strand 62 can be pulled upward. At this time, the slider 67 cannot move upward under the action of friction, thus anchoring the steel strand 62 and preventing it from falling out of the circular channel 61. Subsequently, the clamp anchor 69 is sleeved on the upper outer wall of the steel strand 62, and the movable plate 611 is movably sleeved on the threaded shaft 610 so that the limiting tube 612 is aligned with the clamp anchor 69. Because the inner diameter of the limiting tube 612 is larger than the lower diameter of the clamp anchor 69 but smaller than its upper diameter, when the moving plate 611 is pushed upward, the limiting tube 612 will abut against the upper part of the clamp anchor 69, restricting its upward movement. Then, the limiting nut 613 is tightened, causing it to move downward along the threaded shaft 610 and press against the moving plate 611. The moving plate 611 applies downward pressure to the clamp anchor 69 through the limiting tube 612, causing the clamp anchor 69 to tightly clamp the steel strand 62, further enhancing the anchoring effect of the steel strand 62 in the circular channel 61. This provides continuous preload for the joint connection between the upper precast concrete column 1 and the lower precast concrete column 2, effectively improving the overall stiffness and pull-out resistance of the joint.

[0035] Example 3, please refer to Figure 1 - Figure 7Based on Embodiment 1, a shear-resistant component 7 is provided at the upper end of the steel column shoe lower cover plate 53. The shear-resistant component 7 includes a shear-resistant groove 71, which is opened at the top of the lower precast concrete column 2. A shear-resistant key 72 and a lifting shaft 77 are slidably passed through the inner side of the steel column shoe lower cover plate 53. A moving block 73 is slidably connected to the upper end of the steel column shoe lower cover plate 53. An inclined groove 74 is opened on the outer wall of the moving block 73. A sliding shaft 75 is fixedly connected to the side of the shear-resistant key 72. The end of the sliding shaft 75 away from the moving block 73 is slidably connected to the inside of the inclined groove 74. A push block 76 is fixedly connected to the top of the lifting shaft 77.

[0036] One side of the push block 76 is in contact with one side of the moving block 73, and the surfaces of the push block 76 and the moving block 73 that are in contact are both set as inclined surfaces. The inclined surface design not only optimizes the force distribution, but also reduces frictional resistance to a certain extent and improves the overall system operating efficiency.

[0037] A spring 78 is fixedly connected to the side of the movable block 73 away from the push block 76. The other end of the spring 78 is fixedly connected to the reinforcing plate 52. The spring 78 plays an important role in connection and support in this structure, ensuring that the movable block 73 and the reinforcing plate 52 can maintain a certain degree of elasticity and flexibility.

[0038] In use, with the shear key 72 initially in its extended state, the spring 78 is in a naturally extended state, and the lower end of the shear key 72 is not inserted into the shear groove 71. After the threaded rod 54 passes through the lower cover plate 53 of the steel column shoe and the installation of the concave washer 56 and the spherical washer 57 is completed, and the verticality of the upper column is adjusted, the lower cover plate 53 of the steel column shoe is subjected to downward pressure and gradually approaches the top surface of the lower precast concrete column 2 as the fastening nut 58 is tightened. During this process, the bottom of the lifting shaft 77 first contacts the top surface of the lower precast concrete column 2 and is subjected to an upward reaction force, causing the lifting shaft 77 to drive the push block 76 to move upward. Since the contact surface between the push block 76 and the moving block 73 is an inclined surface, when the push block 76 moves upward, it will generate a horizontal pushing force on the moving block 73, causing the moving block 73 to overcome the tension of the spring 78 and slide in the opposite direction of the spring 78; during the sliding process of the moving block 73, the inclined groove 74 on its outer wall will drive the anti-shear key 72 to move downward through the sliding shaft 75 until the lower end of the anti-shear key 72 is completely inserted into the anti-shear groove 71; The cooperation between the shear key 72 and the shear groove 71 effectively transmits the horizontal shear force between the upper precast concrete column 1 and the lower precast concrete column 2, preventing relative slippage of the node connection under horizontal loads. This significantly improves the shear bearing capacity of the connection device and ensures the stability and safety of the structure under horizontal loads such as earthquakes and wind loads. When disassembly or adjustment is required, loosening the fastening nut 58 releases the pressure on the steel column shoe cover plate 53, the spring 78 returns to its natural extension state and pulls the moving block 73 to slide in the opposite direction. The inclined groove 74 drives the shear key 72 to move upward through the sliding shaft 75, so that its lower end can be pulled out of the shear groove 71, facilitating the hoisting and separation of the upper precast concrete column 1 and realizing the disassembly and reusability of the connection device.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precast reinforced concrete column joint connection device, characterized in that, include: Upper precast concrete column and lower precast concrete column; The upper precast main reinforcement is fixedly connected to the interior of the upper precast concrete column; and the bottom of the upper precast main reinforcement extends to the lower end of the upper precast concrete column. The lower precast main reinforcement is fixedly connected to the interior of the lower precast concrete column; and the bottom of the lower precast main reinforcement extends to the upper end of the lower precast concrete column. The bottom of the upper precast main reinforcement is fixedly connected to a steel column shoe upper cover plate, the bottom of the steel column shoe upper cover plate is fixedly connected to a reinforcing plate, the bottom of the reinforcing plate is fixedly connected to a steel column shoe lower cover plate, the top of the lower precast main reinforcement is fixedly connected to a threaded rod, the bottom of the steel column shoe lower cover plate is fixedly connected to a tapered guide sleeve, the outer wall of the threaded rod is movably fitted with a concave washer and a spherical washer, the outer wall of the threaded rod is threaded with a fastening nut, and the outer wall of the lower precast main reinforcement is fixedly fitted with a limiting ring.

2. The precast reinforced concrete column joint connection device according to claim 1, characterized in that, The lower part of the tapered guide sleeve is a tapered flared opening, and the upper part is a cylindrical inner hole.

3. The precast reinforced concrete column joint connection device according to claim 1, characterized in that, The concave surface of the concave washer perfectly matches the convex surface of the spherical washer. The other side of both the concave washer and the spherical washer are flat, with the flat side of the concave washer facing downwards and tightly attached to the steel base plate.

4. The precast reinforced concrete column joint connection device according to claim 1, characterized in that, The number of tapered guide sleeves is exactly the same as the number of lower precast main ribs and threaded rods.

5. A precast reinforced concrete column joint connection device according to claim 1, characterized in that, A prestressing assembly is provided on the inner side of the upper and lower precast concrete columns. The prestressing assembly includes a circular channel located in the middle of the upper and lower precast concrete columns. A steel strand is installed inside the circular channel. A connecting ring is fixedly connected to the bottom of the steel strand. A connecting rod is sleeved in the middle of the connecting ring. A steel rod is fixedly connected to the bottom of the connecting rod. Slanted grooves are provided on both sides of the steel rod. A slider is installed inside the slanted grooves. A clamping anchor is slidably sleeved on the outer wall of the upper end of the steel strand. A threaded shaft is fixedly connected to the top of the upper precast concrete column. A movable plate is movably sleeved on the outer wall of the threaded shaft. A limit tube is fixedly connected to the upper end of the movable plate. A limit nut is threadedly sleeved on the outer wall of the threaded shaft.

6. A precast reinforced concrete column joint connection device according to claim 5, characterized in that, The inner wall of the inclined groove is fixedly connected to a slide rail, the slider is slidably connected to the outer wall of the slide rail, and the outer wall of the slider is provided with friction texture. The lower end of the circular channel is slightly narrower than the upper end.

7. A precast reinforced concrete column joint connection device according to claim 6, characterized in that, The inner diameter of the limiting tube is larger than the lower diameter of the clamp anchor and smaller than the upper diameter of the clamp anchor.

8. A precast reinforced concrete column joint connection device according to claim 7, characterized in that, The upper end of the steel column shoe lower cover plate is provided with a shear-resistant component, which includes a shear-resistant groove. The shear-resistant groove is opened at the top of the lower precast concrete column. A shear-resistant key and a lifting shaft slide through the inner side of the steel column shoe lower cover plate. A moving block is slidably connected to the upper end of the steel column shoe lower cover plate. An inclined groove is opened on the outer wall of the moving block. A sliding shaft is fixedly connected to the side of the shear-resistant key. The end of the sliding shaft away from the moving block is slidably connected to the inside of the inclined groove. A push block is fixedly connected to the top of the lifting shaft.

9. A precast reinforced concrete column joint connection device according to claim 8, characterized in that, One side of the push block is attached to one side of the moving block, and the surfaces of the push block and the moving block that are attached to each other are both set as inclined surfaces.

10. A precast reinforced concrete column joint connection device according to claim 9, characterized in that, A spring is fixedly connected to the side of the movable block away from the push block, and the other end of the spring is fixedly connected to the reinforcing plate.

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