Prefabricated reinforced concrete column beam-column connecting structure

Abstract

The invention discloses a prefabricated reinforced concrete column beam-column connecting structure, and particularly relates to the field of concrete building construction.The prefabricated reinforced concrete column beam-column connecting structure comprises a prefabricated reinforced concrete beam, a prefabricated reinforced concrete upper column and a prefabricated reinforced concrete lower column; a detachable lower shaping mold is arranged between the top end of the prefabricated reinforced concrete lower column and the prefabricated reinforced concrete beam, and a detachable upper shaping mold is arranged between the bottom end of the prefabricated reinforced concrete upper column and the prefabricated reinforced concrete beam. According to the method, the connection mode of preparing the pouring carrying and connecting column on site through the shaping mold is adopted, a non-standard flush contact surface structure is adopted to form a re-pouring contact surface to form occlusion contact, the surface stress and the transverse shearing force are greatly improved, the pouring carrying and connecting column only needs to be prepared through the shaping mold for on-site wet connection, and the construction efficiency is greatly improved. It can be ensured that the connecting piece is suitable for occasions needing rapid construction, the construction speed is guaranteed, and meanwhile the stress requirements of connection strength, transverse shearing force and the like of the connecting piece interface are met.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete building structures. More specifically, the present invention relates to a beam-column connection structure for precast reinforced concrete columns. Background Art

[0002] Precast concrete is a commonly used building material with the characteristics of high strength and modularity. In the construction of prefabricated buildings, the beam-column connection technology is one of the key links. With the acceleration of the urbanization process and the continuous improvement of people's requirements for building quality, the traditional on-site casting method gradually fails to meet the needs. The use of precast concrete structures can improve building quality, shorten the construction period, and cause less environmental pollution. An important link among them is the beam-column connection technology.

[0003] In the prior art, the main connection methods for precast reinforced concrete column beam-columns include two types: wet connection and dry connection. The wet connection is to connect precast components together by cast-in-place concrete to form an integral structure; The dry connection connects precast components together through mechanical connectors (such as sleeves, bolts, etc.) without the need to pour concrete. Among them, the main disadvantages of the wet connection method are the long cycle and the weak joint strength at the joint. Although the dry connection has a fast construction speed, situations such as the corrosion of metal parts, the oxidation of bonding materials, and the weak stress-bearing strength of the stress surface may all have a certain impact on the structural integrity. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a beam-column connection structure for precast reinforced concrete columns. The technical problem to be solved by the present invention is: how to effectively improve the corresponding disadvantages of the wet and dry connection methods in the existing precast reinforced concrete column beam-column connection technology and provide a precast reinforced concrete column beam-column connection solution superior to the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: A beam-column connection structure for precast reinforced concrete columns, including a precast reinforced concrete beam, a precast reinforced concrete upper column, and a precast reinforced concrete lower column. A detachable lower shaping mold is provided between the top end of the precast reinforced concrete lower column and the precast reinforced concrete beam, and a detachable upper shaping mold is provided between the bottom end of the precast reinforced concrete upper column and the precast reinforced concrete beam; Both the precast reinforced concrete upper column and the precast reinforced concrete lower column include a main column body. A precast end column is fixedly provided at the connection end of the main column body and the precast reinforced concrete beam. A shaping arc surface is provided at the edge of the precast end column. A settlement groove is opened at the top end of the precast end column. A wedge-shaped guiding groove is longitudinally opened at the center of the four bottom edges of the precast end column, and the guiding groove is communicated with the settlement groove; The precast reinforced concrete beam includes a main beam body. A connection platform is fixedly provided at the cross intersection of two groups of main beam bodies. Coordination grooves are provided at both the top and bottom ends of the connection platform, and a pouring channel longitudinally penetrating the connection platform is also opened at the center of the coordination groove for pouring wet connection at the joint between the top end of the precast reinforced concrete lower column and the precast reinforced concrete beam. Through the pouring of the pouring channel, a pouring load-bearing column is formed on the connection platform in the lower shaping mold. The precast load-bearing column corresponding to the precast reinforced concrete upper column is formed by pouring a pouring load-bearing column with an upper shaping mold. Dry connection external fittings are installed on the outer sides of the corresponding pouring load-bearing columns of the precast reinforced concrete upper column and the precast reinforced concrete lower column.

[0006] In a preferred embodiment, the precast end column is integrally cast and preformed with the main column body, and the precast end column is arranged in a trapezoidal shape that is narrower at the top and wider at the bottom. The settlement groove is arranged in a cross shape. The top end of the precast end column is divided into four independent upper platforms by the settlement groove, and the guiding groove and the settlement groove divide the center of the precast end column into a center platform with a height lower than that of the upper platform. Reinforcing steel columns are arranged on the upper platform during precasting, and a steel bar framework is arranged on the center platform during precasting.

[0007] In a preferred embodiment, both the upper shaping mold and the lower shaping mold include a mold cylinder shell I and a mold cylinder shell II. The mold cylinder shell I and the mold cylinder shell II jointly form a cylindrical mold. Flanging grooves are opened at the upper and lower edges of the inner cavities of the mold cylinder shell I and the mold cylinder shell II, and the diameter of the flanging groove is larger than the diameter of the inner cavity of the cylindrical mold. A hanging ear frame I is fixedly provided on the outer wall of the edge of the mold cylinder shell I, and a hanging ear frame II is fixedly provided on the outer wall of the edge of the mold cylinder shell II. Clamping grooves are opened on both the hanging ear frame I and the hanging ear frame II, and a clamping assembly is rotatably provided at the position of the clamping groove at the corresponding position of the hanging ear frame II.

[0008] In a preferred embodiment, a pouring hopper is further fixedly provided at the top end of the mold cylinder shell II corresponding to the upper shaping mold, and the pouring hopper is communicated with the inner cavity of the cylindrical mold. The clamping assembly includes a hand-held button head and a main connecting rod. A clamping gasket is provided at the connection between the hand-held button head and the main connecting rod, and the clamping gasket is arranged in a circular ring shape. A steering pin is fixedly provided on the outer wall of one end of the main connecting rod, and a threaded column head is fixedly provided at the other end of the main connecting rod. The main connecting rod is rotatably connected to the clamping groove through the steering pin. The inner diameter of the clamping gasket is larger than the outer diameter of the threaded column head and smaller than the outer diameter of the main connecting rod. An adjustment hole is opened at the center of the hand-held button head, and the hand-held button head is threadedly connected to the threaded column head through the adjustment hole.

[0009] In a preferred embodiment, the distance between the two shaped arc surfaces corresponding to the precast end column is comparable to the inner cavity size of the cylindrical mold; an assembly hole is provided at the position where the coordination groove is aligned with the reinforced steel column, and the inner diameter of the coordination groove is greater than the outer diameter of the upper shaping mold / lower shaping mold.

[0010] In a preferred embodiment, the dry connection external fitting includes an outer peripheral plate and an expansion bolt; The contact surface between adjacent outer peripheral plates is set as an inclined surface of 45°, and mounting holes corresponding to the expansion bolts are provided on the outer peripheral plate.

[0011] In a preferred embodiment, the thickness and height of the outer peripheral plate are both set to the same size, and the height of the outer peripheral plate is equal to the height of the casting connection column, and the length of the outer peripheral plate is the same as the size of the alignment installation edge of the main column body; An anti-rust coating equivalent to the color of the main column body is sprayed on the outer surface of the outer peripheral plate.

[0012] Technical effects and advantages of the present invention: 1. By the connection method of preparing the casting connection column on-site with a shaping mold, with a non-standard flat contact surface structure, when the subsequent precast reinforced concrete upper column, precast reinforced concrete lower column and precast reinforced concrete beam are connected for casting, a bite contact is formed on the re-cast contact surface, resulting in a significant improvement in both surface stress and transverse shear force. Moreover, steel bars are additionally provided at the connection surface, and by directly extending the longitudinal steel bars into the connection surface area for anchoring and pouring concrete, the precast components are connected into a whole, further ensuring the overall connection and anchoring performance of the contact surface between the cast-in-place casting connection column and the precast end column. Each component is prefabricated and formed, and only the casting connection column needs to be prepared by the shaping mold for on-site wet connection, which can ensure its applicability to occasions requiring rapid construction, guarantee the construction speed, and at the same time ensure the stress requirements such as the connection strength and transverse shear force at the interface of the connecting piece; 2. By adding dry connection external fittings outside the casting connection column, the outer peripheral plates form a frame-shaped dry connection external fitting through the inclined contact surfaces, and the dry connection external fitting is fixed to the casting connection column along the mounting holes by using expansion bolts, making the overall appearance of the assembled beam-column connection unified. By using the dry connection method of the dry connection external fitting and reinforced concrete in cooperation with the wet connection of on-site casting by the shaping mold, compared with wet connection casting, it can reduce the amount of concrete used, guarantee the shortening of the construction period, and ensure the connection strength and seismic performance at the connection by using the shaping mold for casting the casting connection column, effectively solving the relative drawbacks in the traditional process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the disassembled structure in the assembled state of the present invention.

[0014] Figure 2Schematic diagram of the assembly and forming structure of the present invention.

[0015] Figure 3 Schematic diagram of the pouring and connecting structure of the pouring and connecting column of the present invention.

[0016] Figure 4 Schematic diagram of the assembly structure of the dry connection external fitting of the present invention.

[0017] Figure 5 Schematic diagram of the precast reinforced concrete beam structure of the present invention.

[0018] Figure 6 Schematic diagram of the precast reinforced concrete lower column structure of the present invention.

[0019] Figure 7 Schematic diagram of the disassembled assembly structure of the dry connection external fitting of the present invention.

[0020] Figure 8 Schematic diagram of the lower shaping mold structure of the present invention.

[0021] Figure 9 Schematic diagram of the upper shaping mold structure of the present invention.

[0022] Figure 10 Schematic diagram of the disassembled explosion structure of the clamping component of the present invention.

[0023] Reference numerals are: 10 precast reinforced concrete beam, 20 precast reinforced concrete upper column, 30 precast reinforced concrete lower column, 40 upper shaping mold, 50 lower shaping mold; 101 main beam body, 102 connecting platform, 103 coordination groove, 104 assembly hole, 105 pouring channel; 301 main column body, 302 precast end column, 303 shaping arc surface, 304 settlement groove, 305 guiding groove, 306 steel bar framework, 307 strengthening steel bar column; 01 pouring and connecting column, 02 dry connection external fitting; 021 peripheral plate, 022 expansion bolt; 501 mold cylinder shell I, 502 mold cylinder shell II, 503 flanging groove, 504 hanging ear frame I, 505 clamping groove, 506 hanging ear frame II, 507 clamping component, 508 pouring hopper; 5071 hand-held button head, 5072 main connecting rod, 5073 clamping gasket, 5074 steering pin, 5075 threaded column head, 5076 adjusting hole. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1: Please refer to the attached Figure 1-2 , the present invention provides a precast reinforced concrete column-beam connection structure, which includes a precast reinforced concrete beam 10, a precast reinforced concrete upper column 20 and a precast reinforced concrete lower column 30. A detachable lower shaping mold 50 is provided between the top end of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10, and a detachable upper shaping mold 40 is provided between the bottom end of the precast reinforced concrete upper column 20 and the precast reinforced concrete beam 10; Please refer to the attached Figure 6 As shown, both the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 include a main column body 301. A precast end column 302 is fixedly provided at the connection end of the main column body 301 and the precast reinforced concrete beam 10. A shaping arc surface 303 is provided at the edge of the precast end column 302. A settlement groove 304 is opened at the top end of the precast end column 302. A wedge-shaped guide groove 305 is longitudinally opened at the center of the bottom edge of the four sides of the precast end column 302, and the guide groove 305 communicates with the settlement groove 304; The precast end column 302 and the main column body 301 are integrally cast and preformed, and the precast end column 302 is set as a trapezoidal shape with a narrow top and a wide bottom; The settlement groove 304 is set in a cross shape. The top end of the precast end column 302 is divided into four groups of independent upper platforms by the settlement groove 304, and the guide groove 305 and the settlement groove 304 divide the center of the precast end column 302 into a center platform with a height lower than the upper platform; Reinforcing steel columns 307 are arranged on the upper platform during precasting, and a steel bar framework 306 is arranged on the center platform during precasting. The precast end column 302 corresponding to the precast reinforced concrete upper column 20 is formed into a casting receiving column 01 by pouring with the upper shaping mold 40; Specifically, when prefabricating the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30, in addition to the conventional formwork molds, molds adapted to the shape of the precast end column 302 are added at the ends, so that the precast reinforced concrete upper column 20 or the precast reinforced concrete lower column 30 generates an integral precast reinforced concrete column when precast and poured using concrete and steel bars. Moreover, the settlement groove 304 and the guiding groove 305 on the precast end column 302 provided at the port of the precast reinforced concrete column form a connected gully-shaped groove. With the structure of a non-standard flush contact surface, when the subsequent precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 are connected to the precast reinforced concrete beam 10 for pouring, a "biting" contact is formed at the re-poured contact surface, which has a significant improvement in surface stress and transverse shear force compared with the plane contact method. Additionally, a reinforced steel column 307 is added at the connection surface and a steel bar skeleton 306 is arranged on the central table surface. By directly inserting the longitudinal steel bars into the connection surface area for anchoring and pouring concrete, the precast components are connected into a whole, further ensuring the anchoring performance of the overall connection between the cast-in-place column 01 and the contact surface of the precast end column 302; Please refer to the appendix Figure 5 As shown, the precast reinforced concrete beam 10 includes a main beam body 101. A connection platform 102 is fixedly provided at the cross intersection of the two main beam bodies 101. Coordination grooves 103 are provided at both the top and bottom ends of the connection platform 102, and a pouring channel 105 longitudinally penetrating the connection platform 102 is also opened at the center of the coordination groove 103, which is used for wet connection pouring at the connection between the top end of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10. Through the pouring of the pouring channel 105, the connection platform 102 in the lower shaping mold 50 generates a cast-in-place column 01; Please refer to the appendix Figure 8 As shown, both the upper shaping mold 40 and the lower shaping mold 50 include a mold cylinder shell Ⅰ501 and a mold cylinder shell Ⅱ502. The mold cylinder shell Ⅰ501 and the mold cylinder shell Ⅱ502 together form a cylindrical mold. Flanging grooves 503 are opened at the upper and lower edges of the inner cavities of the mold cylinder shell Ⅰ501 and the mold cylinder shell Ⅱ502, and the diameter of the flanging groove 503 is larger than the diameter of the inner cavity of the cylindrical mold; An ear hanger Ⅰ504 is fixedly provided on the outer wall of the edge of the mold cylinder shell Ⅰ501, and an ear hanger Ⅱ506 is fixedly provided on the outer wall of the edge of the mold cylinder shell Ⅱ502. Locking grooves 505 are opened on both the ear hanger Ⅰ504 and the ear hanger Ⅱ506, and a clamping assembly 507 is rotatably provided at the position of the locking groove 505 at the alignment position of the ear hanger Ⅱ506; Please refer to the appendix Figure 9 As shown, a pouring hopper 508 is further fixedly provided at the top of the mold cylinder shell Ⅱ502 corresponding to the upper shaping mold 40, and the pouring hopper 508 is communicated with the inner cavity of the cylindrical mold; Please refer to the appendix Figure 10As shown, the clamping assembly 507 includes a hand-held button head 5071 and a main connecting rod 5072, and a clamping gasket 5073 is provided at the connection between the hand-held button head 5071 and the main connecting rod 5072, and the clamping gasket 5073 is set in a circular ring shape; a steering pin 5074 is fixedly provided at the outer wall of one end of the main connecting rod 5072, and a threaded column head 5075 is fixedly provided at the other end of the main connecting rod 5072, and the main connecting rod 5072 is rotatably connected to the fixing groove 505 through the steering pin 5074, and the inner diameter of the clamping gasket 5073 is larger than the outer diameter of the threaded column head 5075 and smaller than the outer diameter of the main connecting rod 5072; an adjustment hole 5076 is opened at the center of the hand-held button head 5071, and the hand-held button head 5071 is threadedly connected to the threaded column head 5075 through the adjustment hole 5076; Please see attached Figure 5-6 As shown, the distance between the two shaping arc surfaces 303 of the prefabricated end column 302 is equivalent to the inner size of the cylindrical mold; the coordination groove 103 and the reinforcing steel bar column 307 are provided with an assembly hole 104, and the inner diameter of the coordination groove 103 is larger than the outer diameter of the upper shaping mold 40 / lower shaping mold 50; Specifically, the prefabricated precast reinforced concrete lower column 30 is first transported to the cross of the precast reinforced concrete beam 10, the main column 301 is moved to align with the connection platform 102, and the reinforced steel column 307 aligned with the precast reinforced concrete lower column 30 is inserted into the assembly hole 104 on the bottom surface of the connection platform 102 to complete the installation / fixation of the main column 301 to the ground, and then the mold cylinder shell I 501 and the mold cylinder shell II 502 corresponding to the lower shaping mold 50 are clamped at the position of the precast end column 302 at the top of the precast reinforced concrete lower column 30, and the body position of the shaping arc surface 303 and the coordination groove 103 on the bottom surface of the connection platform 102 is limited (i.e. Figures 1 to 2 ), the pouring channel 105 at the top of the connecting platform 102 can be used as a pouring port to pour concrete into the lower shaping mold 50 between the top of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10, so that the space between the top of the precast reinforced concrete lower column 30 and the pouring channel 105 is poured into the lower half of the pouring support column 01, and then the precast reinforced concrete upper column 20 and the upper shaping mold 40 are aligned and installed at the coordination groove 103 at the top of the connecting platform 102 by the same steps, and concrete is poured into the inner cavity of the upper shaping mold 40 by the pouring bucket 508, completing the pouring preparation of the upper half of the pouring support column 01; In addition, the reinforcing steel column 307 that can directly align the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 is respectively assembled into the top and bottom assembly holes 104 of the connection platform 102. Then, the barrel shell I 501 and the barrel shell II 502 of the upper sizing die 40 and the lower sizing die 50 are aligned and installed. Through the rotation of the main connecting rod 5072 of the clamping assembly 507 via the steering pin 5074, the end of the main connecting rod 5072 near the threaded column head 5075 is placed in the clamping groove 505 aligned with the hanging ear frame I 504. Rotate the hand-held button head 5071. Through the threaded connection between the threaded column head 5075 and the adjustment hole 5076, adjust the position of the hand-held button head 5071 relative to the hanging ear frame I 504, so that the end of the hand-held button head 5071 together with the clamping gasket 5073 tightly fixes the positions of the hanging ear frame I 504 and the hanging ear frame II 506, and then completes the assembly of the upper sizing die 40 and the lower sizing die 50 (i.e., Figure 2 ), and then directly pour concrete by the pouring hopper 508. During this period, a bulkhead vibrator can be used to remove the air bubbles in the concrete. After the concrete solidifies, rotate the hand-held button head 5071 and then disassemble the upper sizing die 40 and the lower sizing die 50 respectively, and carve and remove the overflow pouring port convex block of the pouring hopper 508 at the alignment position of the upper sizing die 40, so as to form a pouring and connecting column 01 that connects the precast reinforced concrete beam 10, the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 together (i.e., Figure 3 ). Integrate and connect in the way of on-site mold pouring wet connection. Through the direct connection between the pouring and connecting column 01 and the precast reinforced concrete beam 10, pour the pouring and connecting column 01 with grouting of prefabricated parts in the sizing die, and the wet connection between the pouring and connecting column 01 and the precast end column 302 in a biting manner, and set the steel bars at the connection interface to form a mechanical connection, so as to form an integrated pouring and connecting column 01 for connection, which can better transfer internal forces, improve the integrity and seismic performance of the beam and column. Each component is prefabricated. The on-site wet connection only needs to prepare the pouring and connecting column 01 by the sizing die, which can ensure its application in occasions that require rapid construction, ensure the construction speed, and at the same time ensure the stress requirements such as the connection strength and transverse shear force at the interface of the connecting parts, meeting the requirements of the society for the construction speed and stress strength of precast concrete with the continuous development of technology; Embodiment 2: Based on Embodiment 1, please refer to Figures 4 to 7 , this embodiment provides a solution for sealing the connection between the pouring and connecting column 01 and the precast reinforced concrete beam 10, specifically as follows: As Figure 4 , dry connection external fittings 02 are installed on the outer sides of the corresponding pouring and connecting columns 01 of the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30; As Figure 7The dry connection external accessories 02 include an outer plate 021 and expansion bolts 022; the contact surface of adjacent outer plates 021 is set to a 45° surface, and the outer plate 021 is provided with a mounting hole equivalent to the expansion bolt 022; the thickness and height of the outer plate 021 are set to the same size, and the height of the outer plate 021 is equal to the height of the cast supporting column 01, and the length of the outer plate 021 is the same as the size of the mounting edge of the main column 301; the outer surface of the outer plate 021 is sprayed with anti-rust paint of the same color as the main column 301.

[0026] The specific implementation method is as follows: after the upper shaping mold 40 and the lower shaping mold 50 are used to cast the loading column 01, the outer plate 021 is selected to form a frame-shaped dry connection external accessory 02 through the inclined contact surface, and a hole is opened in the loading column 01 along the installation hole using an electric hammer, and the expansion bolt 022 is used to complete the fixation of the dry connection external accessory 02 and the loading column 01 along the installation hole, and the outer plate 021 is sprayed with an anti-rust paint of the same color as the main column 301, and the overall installation of the dry connection external accessory 02 and the reinforced concrete component is completed, so that the overall appearance of the assembled beam-column connection is unified, and the thin lines caused by the difference in appearance of the connection on site are avoided. In order to reduce the deviation of the greasy degree, the dry connection method of the dry connection external accessories 02 and the reinforced concrete is coordinated with the wet connection of the fixed mold on-site casting to replace the traditional separate dry connection or wet connection. On the one hand, the dry connection method of the dry connection external accessories 02 can be used to reduce the amount of concrete used compared with the wet connection casting, thereby shortening the solidification and oxidation time of the concrete at the casting point and ensuring the shortening of the construction period; on the other hand, the fixed mold is used to cast the loading column 01 to ensure the wet connection at the connection to the reinforced concrete. Guarantee the connection strength and seismic performance, effectively solve the relative disadvantages of the separate reinforced concrete dry connection and reinforced concrete wet connection in the traditional process.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated reinforced concrete column-beam-column connection structure, comprising a prefabricated reinforced concrete beam (10), a prefabricated reinforced concrete upper column (20) and a prefabricated reinforced concrete lower column (30), characterized in that: A detachable lower shaping mold (50) is provided between the top end of the precast reinforced concrete lower column (30) and the precast reinforced concrete beam (10), and a detachable upper shaping mold (40) is provided between the bottom end of the precast reinforced concrete upper column (20) and the precast reinforced concrete beam (10); The prefabricated reinforced concrete upper column (20) and the prefabricated reinforced concrete lower column (30) both comprise a main column body (301) and a prefabricated end column (302); a sedimentation trough (304) is provided at the top of the prefabricated end column (302); a wedge-shaped guide groove (305) is longitudinally provided at the center of the bottom edges of the four sides of the prefabricated end column (302); the sedimentation trough (304) is arranged in a cross shape; the top of the prefabricated end column (302) is divided into four groups of independent upper table surfaces by the sedimentation trough (304); and the guide groove (305) and the sedimentation trough (304) divide the center of the prefabricated end column (302) into a central table surface whose height is lower than the upper table surface.

2. A prefabricated reinforced concrete column-beam-column connection structure according to claim 1, characterized in that: A prefabricated end column (302) is fixedly provided at the connection end between the main column (301) and the prefabricated reinforced concrete beam (10), a shaped arc surface (303) is provided at the edge of the prefabricated end column (302), and the guide groove (305) is connected to the sedimentation groove (304), the prefabricated end column (302) and the main column (301) are integrally cast and prefabricated, and the prefabricated end column (302) is arranged in a terrace shape that is narrow at the top and wide at the bottom; When the upper table top is prefabricated, reinforced steel bars (307) are arranged thereon, and when the central table top is prefabricated, a steel bar skeleton (306) is arranged thereon.

3. A prefabricated reinforced concrete column-beam-column connection structure according to claim 2, characterized in that: The upper shaping mold (40) and the lower shaping mold (50) both comprise a mold barrel shell I (501) and a mold barrel shell II (502), wherein the mold barrel shell I (501) and the mold barrel shell II (502) together form a cylindrical mold, and the mold barrel shell I (501) and the mold barrel shell II (502) are both provided with folding grooves (503) at the upper and lower edges of the inner cavities, and the caliber of the folding grooves (503) is larger than the caliber of the inner cavity of the cylindrical mold; The mold cylinder shell I (501) is fixedly provided with an ear frame I (504) at the edge outer wall, and the mold cylinder shell II (502) is fixedly provided with an ear frame II (506) at the edge outer wall. Both the ear frame I (504) and the ear frame II (506) are provided with a locking groove (505). The locking groove (505) at the position of the ear frame II (506) is rotatably provided with a clamping component (507).

4. A prefabricated reinforced concrete column-beam-column connection structure according to claim 3, characterized in that: A pouring hopper (508) is fixedly provided on the top of the mold cylinder shell II (502) corresponding to the upper shaping mold (40), and the pouring hopper (508) is in communication with the inner cavity of the cylindrical mold; The clamping assembly (507) comprises a handheld button head (5071) and a main connecting rod (5072); a clamping gasket (5073) is provided at the connection between the handheld button head (5071) and the main connecting rod (5072); the clamping gasket (5073) is arranged in a circular ring shape; A steering pin (5074) is fixedly provided on the outer wall of one end of the main connecting rod (5072), a threaded column head (5075) is fixedly provided on the other end of the main connecting rod (5072), the main connecting rod (5072) is rotatably connected to the locking groove (505) via the steering pin (5074), and the inner diameter of the clamping gasket (5073) is larger than the outer diameter of the threaded column head (5075) and smaller than the outer diameter of the main connecting rod (5072); An adjustment hole (5076) is provided at the center of the hand-held button head (5071), and the hand-held button head (5071) is threadedly connected to the threaded column head (5075) through the adjustment hole (5076).

5. The prefabricated reinforced concrete column-beam-column connection structure according to claim 2, characterized in that: The spacing between the two shaping arc surfaces (303) of the prefabricated end column (302) is equivalent to the inner cavity size of the cylindrical mold; the coordination groove (103) and the reinforcing steel bar column (307) are provided with an assembly hole (104), and the inner diameter of the coordination groove (103) is larger than the outer diameter of the upper shaping mold (40) / lower shaping mold (50).

6. The prefabricated reinforced concrete column-beam-column connection structure according to claim 1, characterized in that: The precast reinforced concrete beam (10) comprises a main beam body (101), and a connection platform (102) is fixedly provided at the cross intersection of two groups of main beam bodies (101), and the top and bottom ends of the connection platform (102) are both provided with a coordination groove (103), and a casting channel (105) is also provided at the center of the coordination groove (103) and longitudinally penetrates the connection platform (102), so as to cast a wet connection between the top of the precast reinforced concrete lower column (30) and the connection point of the precast reinforced concrete beam (10), and the casting of the casting channel (105) enables the connection platform (102) in the lower shaping mold (50) to generate a casting bearing column (01); The precast end column (302) corresponding to the precast reinforced concrete upper column (20) is cast by an upper shaping mold (40) to form a cast-in-place connecting column (01), and dry connection external accessories (02) are installed on the outer sides of the cast-in-place connecting columns (01) corresponding to the precast reinforced concrete upper column (20) and the precast reinforced concrete lower column (30); The dry connection external fittings (02) include an outer plate (021) and expansion bolts (022); The contact surfaces of adjacent peripheral plates (021) are arranged as inclined surfaces at 45 degrees, and mounting holes corresponding to the expansion bolts (022) are provided on the peripheral plates (021).

7. A prefabricated reinforced concrete column-beam-column connection structure according to claim 6, characterized in that: The thickness and height of the outer plate (021) are both set to the same size, and the height of the outer plate (021) is equal to the height of the cast receiving column (01), and the length of the outer plate (021) is the same as the size of the mounting edge of the main column (301); The outer surface of the peripheral plate (021) is sprayed with anti-rust paint having the same color as the main column (301).

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