Prefabricated building connection node and its construction method

Abstract

The present invention relates to the technical field of connection nodes in general building structures, and specifically relates to a prefabricated building connection node and its construction method. The prefabricated building connection node in the present invention includes a prefabricated building concrete wall and a prefabricated ring beam. The bottom end surface of the prefabricated building concrete wall is fixedly arranged on the upper surface of the prefabricated ring beam, and the bottom end surface of the prefabricated building concrete wall and the upper surface of the prefabricated ring beam are initially connected and positioned through a plurality of limiting columns; a columnar notch one is arranged at the bottom of the right-angle corner of the outer side wall of the prefabricated building concrete wall, and a columnar notch two is arranged at the right-angle corner of the outer side wall of the prefabricated ring beam; the prefabricated building concrete wall and the prefabricated ring beam are fixedly connected through a cast-in-place connection column arranged in the columnar notch one and the columnar notch two, and the lower end of the cast-in-place connection column is embedded in the ground below the prefabricated ring beam. The present invention can improve the fixing strength and stability at the connection node between the prefabricated building and the foundation ring beam.

Description

Technical Field

[0001] The present invention relates to the technical field of connection nodes in general building structures, and specifically to a prefabricated building connection node and its construction method. Background Art

[0002] The on-site construction of buildings generally has problems such as long cycle, high cost, and difficult management. The problem can be well solved by prefabricating and assembling a building in a factory and then transporting it to the construction site for installation.

[0003] At present, after a prefabricated building is transported to the construction site and hoisted, it is generally fixed to the foundation ring beam through metal anchor fittings such as bolts. Compared with traditional on-site cast buildings, there are generally problems of insufficient fixing strength, low stability, and easy corrosion of metal parts. Especially in the event of extreme situations such as earthquakes and debris flows, when the prefabricated building is under external force, the metal anchor fittings are extremely easy to break, resulting in the displacement of the overall building and potential safety hazards.

[0004] For example, the patent document with the publication number CN215802451U discloses a precast concrete door wall based on PBL connection, including a concrete door wall; the concrete door wall is connected to the adjacent concrete wall through wall-wall embedded parts, and the wall-wall embedded parts are respectively arranged at the upper and lower ends of both sides of the concrete door wall. The upper part of the concrete door wall is provided with wall-upper ring beam embedded parts, and the wall-upper ring beam embedded parts are respectively located at both ends of the upper part of the concrete door wall. The lower part of the concrete door wall is provided with wall-lower ring beam embedded parts, and the wall-lower ring beam embedded parts are respectively located at both ends of the lower part of the concrete door wall. In the specific implementation of this solution, the concrete door wall is connected to the lower ring beam by bolts passing through the wall-lower ring beam embedded parts at the lower part. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a prefabricated building connection node, which can make the fixing strength and stability at the connection node between the prefabricated building and the foundation ring beam higher.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a prefabricated assembled building connection node, including a prefabricated building concrete wall and a prefabricated ring beam. The bottom end surface of the prefabricated building concrete wall is fixedly arranged on the upper surface of the prefabricated ring beam. A number of positioning and limiting holes are arranged on the bottom end surface of the prefabricated building concrete wall, and a number of limiting column installation holes are arranged on the upper surface of the prefabricated ring beam. Limiting columns are installed in the limiting column installation holes, and the top ends of the limiting columns are respectively clamped in the positioning and limiting holes; at the bottom of the right-angle corner of the outer side wall of the prefabricated building concrete wall, there is a columnar notch one, and a pouring hole penetrating to the columnar notch one is arranged on the prefabricated building concrete wall above the columnar notch one; at the right-angle corner of the outer side wall of the prefabricated ring beam, there is a columnar notch two; the prefabricated building concrete wall and the prefabricated ring beam are fixedly connected by a cast-in-place connecting column, and the lower end of the cast-in-place connecting column is embedded in the ground below the prefabricated ring beam; the cast-in-place connecting column is formed by pouring concrete into the columnar notch one and the columnar notch two through the pouring hole; horizontal connecting steel bar assemblies are arranged in both the columnar notch one and the columnar notch two, and the prefabricated anchoring ends of the horizontal connecting steel bar assemblies are respectively arranged in the prefabricated building concrete wall and the prefabricated ring beam; a vertical connecting bar assembly is arranged in the columnar notch one and is fixed to the horizontal connecting steel bar assembly in the columnar notch one, a vertical pouring bar assembly is arranged in the columnar notch two and is fixed to the horizontal connecting steel bar assembly in the columnar notch two, and the vertical connecting bar assembly and the vertical pouring bar assembly are connected by a connecting assembly. The horizontal connecting steel bar assembly, the vertical connecting bar assembly, the vertical pouring bar assembly, and the connecting assembly are all arranged in the cast-in-place connecting column.

[0007] For the convenience of connection and assembly, the preferred solution is that at least one of the upper end head of the limiting column and the outer port position of the positioning and limiting hole is provided with a guiding inclined surface or a guiding arc surface arranged in a ring shape.

[0008] To further improve the fixing strength and stability at the connection node, the preferred solution is that at least two groups of horizontal connecting steel bar assemblies are arranged in both the columnar notch one and the columnar notch two, and they are at different height plane positions.

[0009] To further improve the fixing strength and stability at the connection node and facilitate construction, the preferred solution is that each group of horizontal connecting steel bar assemblies is composed of a V-shaped outer bar and a V-shaped inner bar in the same height plane. The two ends of the V-shaped outer bar and the two ends of the V-shaped inner bar of the prefabricated building concrete wall are respectively prefabricated and anchored on two adjacent side surfaces in the columnar notch one, and the two ends of the V-shaped outer bar and the two ends of the V-shaped inner bar of the prefabricated ring beam are respectively prefabricated and anchored on two adjacent side surfaces in the columnar notch two.

[0010] To further enhance the fixing strength and stability at the connection node and facilitate construction, the preferred solution is that the top of the vertical connecting bar assembly is precast and anchored in the precast building concrete wall, and the bottom end is suspended in the first columnar notch; the vertical connecting bar assembly is composed of five vertical connecting bars arranged in a regular pentagon, and the vertical pouring bar assembly is composed of five vertical pouring bars arranged in a regular pentagon. The five vertical connecting bars correspond to the five vertical pouring bars one by one.

[0011] To further enhance the fixing strength and stability at the connection node, the preferred solution is that the included angles of the V-shaped outer bars and the V-shaped inner bars are both 108°. Three of the five vertical connecting bars are arranged inside the V-shaped outer bars and are welded or tied to the V-shaped outer bars. The other two of the five vertical connecting bars are arranged inside the V-shaped inner bars and are welded or tied to the V-shaped inner bars; three of the five vertical pouring bars are arranged inside the V-shaped outer bars and are welded or tied to the V-shaped outer bars. The other two of the five vertical pouring bars are arranged inside the V-shaped inner bars and are welded or tied to the V-shaped inner bars.

[0012] To further enhance the fixing strength and stability at the connection node, the preferred solution is that the connection assembly includes anchor sleeves, connecting rods, cables and locks. There are five anchor sleeves, which are respectively sleeved and fixed at the joints of the five vertical connecting bars and the five vertical pouring bars. There are five connecting rods, which are respectively arranged between two adjacent anchor sleeves. The lock is arranged inside the area surrounded by the five anchor sleeves. There are five cables. One ends of the five cables are all installed in the lock, and the other ends are respectively fixedly connected to the five anchor sleeves.

[0013] To further enhance the fixing strength and stability at the connection node and facilitate construction, the preferred solution is that the connection assembly further includes special-shaped nuts. There are five groups of special-shaped nuts, which correspond to the five anchor sleeves respectively. Each group of special-shaped nuts has two, which are respectively arranged at both ends of the anchor sleeve; each special-shaped nut is composed of a flared end at its first axial end and a straight pipe end at its second axial end. The inner wall of the flared end of the special-shaped nut fits with the outer wall of the end of the anchor sleeve. The internal threads provided on the straight pipe ends of the special-shaped nuts respectively cooperate with the external threads of the connecting bars provided at the lower ends of the vertical connecting bars and the external threads of the pouring bars provided at the upper ends of the vertical pouring bars; the connection between the anchor sleeve and the vertical connecting bar and the connection between the anchor sleeve and the vertical pouring bar are respectively connected and fixed by the special-shaped nuts.

[0014] To further enhance the fixing strength and stability at the connection node, the preferred solution is that the joints of the five vertical connecting bars and the five vertical pouring bars are arranged at different height positions; the five anchor sleeves are arranged in a regular pentagon in the horizontal plane projection.

[0015] Based on the prefabricated building connection nodes described above, specific implementation is carried out. The present invention also provides a construction method for prefabricated building connection nodes, including the following steps:

[0016] S1. Prefabrication of prefabricated buildings:

[0017] Install the formwork and leave a space for the first columnar notch. Then, lay and tie the horizontal connection steel bar assemblies, vertical connection steel bar assemblies, and the steel bars in the precast building concrete wall within the first columnar notch, so that the horizontal connection steel bar assemblies and vertical connection steel bar assemblies penetrate into the space of the first columnar notch, and reserve positioning and limiting holes through the mold. Finally, pour concrete to construct the precast building concrete wall and assemble it into the required prefabricated building;

[0018] S2. Prefabrication of ring beams:

[0019] Install the formwork and leave a space for the second columnar notch. Then, lay and tie the horizontal connection steel bar assemblies and the steel bars in the precast ring beam within the second columnar notch, so that the horizontal connection steel bar assemblies penetrate into the space of the second columnar notch, and reserve limiting column installation holes through the mold. Finally, pour concrete to construct the precast ring beam;

[0020] S3. Hoisting of prefabricated buildings:

[0021] Install the limiting columns one by one in the limiting column installation holes preset on the precast ring beam; then hoist the prefabricated building obtained in step S1 onto the precast ring beam obtained in step S2, so that the tops of the limiting columns are all clamped in the corresponding positioning and limiting holes;

[0022] S4. Excavation of column pits and steel bar binding:

[0023] Excavate column pits on the ground at the position of the second columnar notch of the precast ring beam; then lay and tie the vertical pouring steel bar assemblies, so that the vertical pouring steel bar assemblies correspond to the vertical connection steel bar assemblies in position, and the ends of the two are closely attached together; finally, weld or tie and fix the vertical connection steel bar assemblies and vertical pouring steel bar assemblies to the corresponding horizontal connection steel bar assemblies respectively;

[0024] S5. Installation of connection components:

[0025] Install the connection components and anchor and fix the vertical connection steel bar assemblies and vertical pouring steel bar assemblies together;

[0026] S6. Opening of pouring holes:

[0027] Open pouring holes on the precast building concrete wall above the first columnar notch, and make the pouring holes penetrate into the first columnar notch;

[0028] S7. Pouring of connection columns:

[0029] Concrete is poured into the first columnar notch and the second columnar notch through the pouring holes, and the concrete completely wraps the transverse connecting steel bar assembly, the vertical connecting reinforcement assembly, the vertical pouring reinforcement assembly and the connecting assembly. After the cured concrete is cured, the cast-in-place connecting column is formed, thus completing the entire construction process of the connection node of the prefabricated building.

[0030] The beneficial effects of the present invention are as follows: The overall structure is simple and compact. The limit column plays a role in preliminary connection and positioning. By setting the vertical connecting reinforcement assembly, the vertical pouring reinforcement assembly and anchoring and connecting them together through the connecting assembly, and together with the transverse connecting steel bar assembly, concrete is poured to form a cast-in-place connecting column, thereby connecting and fixing the precast building concrete wall and the precast ring beam. The installation is convenient and fast, improving the connection and fixing strength between the prefabricated building and the precast ring beam, avoiding the problem that metal anchor fittings such as bolts are prone to corrosion, and the overall structure has good stability and high strength; in extreme situations such as earthquakes and anti-debris flows, the overall building is not easily displaced, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a three-dimensional structure schematic diagram after the implementation of the present invention is completed;

[0032] Figure 2 is Figure 1 a schematic diagram of the structure corresponding to the embodiment shown before the concrete of the cast-in-place connecting column is poured;

[0033] Figure 3 is a schematic diagram of the exploded structure of the present invention;

[0034] Figure 4 is a schematic diagram of the installation structure of the vertical connecting reinforcement assembly, the vertical pouring reinforcement assembly and the connecting assembly of the present invention;

[0035] Figure 5 is a partial three-dimensional structure schematic diagram of the connecting assembly of the present invention;

[0036] Figure 6 is a schematic diagram of the structure of the connecting assembly of the present invention in the top view direction.

[0037] The component marks in the figure are: precast building concrete wall 1, first columnar notch 11, pouring hole 12, limit column 13, precast ring beam 2, second columnar notch 23, limit column installation hole 24, cast-in-place connecting column 3, transverse connecting steel bar assembly 4, V-shaped outer steel bar 41, V-shaped inner steel bar 42, vertical connecting reinforcement assembly 5, vertical connecting reinforcement 51, external thread of connecting reinforcement 52, vertical pouring reinforcement assembly 6, vertical pouring reinforcement 61, external thread of pouring reinforcement 62, connecting assembly 7, anchor sleeve 71, special-shaped nut 72, connecting rod 73, cable 74, lock 75. DETAILED DESCRIPTION OF THE INVENTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] As Figures 1 to 6 shown, the prefabricated assembled building connection node of the present invention includes a prefabricated building concrete wall 1 and a prefabricated ring beam 2. The bottom end surface of the prefabricated building concrete wall 1 is fixedly arranged on the upper surface of the prefabricated ring beam 2. A plurality of positioning and limiting holes (the specific number is flexibly designed according to the actual situation) are arranged on the bottom end surface of the prefabricated building concrete wall 1. A plurality of limiting column installation holes 24 (which can correspond to the positioning and limiting holes one by one) are arranged on the upper surface of the prefabricated ring beam 2. Limiting columns 13 are installed in the limiting column installation holes 24, and the tops of the limiting columns 13 are respectively clamped in the positioning and limiting holes; at the bottom of the right-angle corner of the outer side wall of the prefabricated building concrete wall 1, a columnar notch one 11 is arranged (which is equivalent to being arranged at the external corner position of the wall), and a pouring hole 12 penetrating to the columnar notch one 11 is arranged on the prefabricated building concrete wall 1 above the columnar notch one 11; at the right-angle corner of the outer side wall of the prefabricated ring beam 2, a columnar notch two 23 is arranged (which is equivalent to being arranged at the external corner position of the ring beam); the prefabricated building concrete wall 1 and the prefabricated ring beam 2 are fixedly connected by a cast-in-place connecting column 3, and the lower end of the cast-in-place connecting column 3 is embedded in the ground below the prefabricated ring beam 2; the cast-in-place connecting column 3 is formed by pouring concrete into the columnar notch one 11 and the columnar notch two 23 through the pouring hole 12; transverse connecting steel bar assemblies 4 are arranged in both the columnar notch one 11 and the columnar notch two 23, and the prefabricated anchoring ends of the transverse connecting steel bar assemblies 4 are respectively arranged in the prefabricated building concrete wall 1 and the prefabricated ring beam 2 (that is, the prefabricated anchoring end of the transverse connecting steel bar assembly 4 in the area where the prefabricated building concrete wall 1 is located is arranged in the prefabricated building concrete wall 1, and the prefabricated anchoring end of the transverse connecting steel bar assembly 4 in the area where the prefabricated ring beam 2 is located is arranged in the prefabricated ring beam 2); a vertical connecting bar assembly 5 is arranged in the columnar notch one 11 and is fixed to the transverse connecting steel bar assembly 4 in the columnar notch one 11, a vertical pouring bar assembly 6 is arranged in the columnar notch two 23 and is fixed to the transverse connecting steel bar assembly 4 in the columnar notch two 23, the vertical connecting bar assembly 5 and the vertical pouring bar assembly 6 are connected by a connecting assembly 7, and the transverse connecting steel bar assembly 4, the vertical connecting bar assembly 5, the vertical pouring bar assembly 6 and the connecting assembly 7 are all arranged in the cast-in-place connecting column 3.

[0040] It is understandable that, for the convenience of connection and assembly, the limiting column 13 usually has guiding inclined surfaces or guiding arc surfaces arranged in a ring at both ends of the limiting column 13, or guiding inclined surfaces or guiding arc surfaces arranged in a ring are respectively provided at the outer ports of the limiting column installation holes 24 and the outer ports of the positioning and limiting holes. During the specific construction of the present invention, generally, the precast ring beam 2 is first installed, and the limiting column 13 is inserted into the limiting column installation hole 24, and finally the precast building concrete wall 1 is hoisted. Therefore, in order to facilitate the quick alignment of the positioning and limiting holes and the limiting column 13 during hoisting, generally at least one of the upper end of the limiting column 13 and the outer port of the positioning and limiting hole is selected to be provided with a guiding inclined surface or a guiding arc surface, that is, it is equivalent to that both can also be provided at the same time.

[0041] There are generally at least two pouring holes 12, and some of them are selected as the concrete pouring ports for the cast-in-place connecting column 3, and the other pouring holes 12 are used as air vents during the concrete pouring process. The setting position of the pouring holes 12 is not limited, and corresponding design can be carried out for the convenience of pouring. Generally, they can be directly set at the position on the outer side wall of the precast building concrete wall 1 adjacent to the upper end surface of the columnar notch 11.

[0042] There is no specific requirement for the cross-sectional shape of the cast-in-place connecting column 3, as long as the cast-in-place connecting column 3 is generally columnar. However, for the convenience of setting the pouring formwork, the cross-section of the cast-in-place connecting column 3 is generally preferably rectangular.

[0043] During the specific implementation, the precast building concrete wall 1 can generally be prefabricated and assembled in the factory according to the drawings, and the precast ring beam 2 can generally be prefabricated in advance at the predetermined position at the building construction site according to the drawings. Based on the above implementation of the precast and assembled building connection node, the overall construction method of the present invention generally includes the following steps:

[0044] S1. Prefabrication of precast and assembled buildings:

[0045] Through the installation of the formwork and leaving the space of the columnar notch 11 vacant, then the laying and binding of the transverse connecting steel bar assembly 4, the vertical connecting reinforcement assembly 5 and the steel bars in the precast building concrete wall 1 are carried out, so that the transverse connecting steel bar assembly 4 and the vertical connecting reinforcement assembly 5 penetrate into the space of the columnar notch 11; the positioning and limiting holes are reserved through the mold; finally, concrete is poured, thereby constructing the precast building concrete wall 1 and assembling it into the required precast and assembled building;

[0046] S2. Prefabrication of the ring beam:

[0047] Install through the template and leave the space of the second columnar notch 23 empty, then lay and tie the horizontal connecting steel bar assembly 4 and the steel bars in the precast ring beam 2 in the second columnar notch 23, so that the horizontal connecting steel bar assembly 4 penetrates into the space of the second columnar notch 23, and reserve the limit column installation holes 24 through the mold; finally pour concrete to construct the precast ring beam 2;

[0048] S3. Hoisting of prefabricated buildings:

[0049] Install the limit columns 13 one by one in the limit column installation holes 24 preset on the precast ring beam 2; then hoist the prefabricated building obtained in step S1 onto the precast ring beam 2 obtained in step S2, so that the tops of the limit columns 13 are all clamped in the corresponding positioning limit holes;

[0050] S4. Excavation of column pits and steel bar binding:

[0051] Excavate column pits on the ground at the position of the second columnar notch 23 of the precast ring beam 2; then lay and tie the vertical pouring steel bar assembly 6, so that the vertical pouring steel bar assembly 6 corresponds to the position of the vertical connecting steel bar assembly 5, and the ends of the two are closely attached together; finally, weld or tie and fix the vertical connecting steel bar assembly 5 and the vertical pouring steel bar assembly 6 to the corresponding horizontal connecting steel bar assemblies 4 respectively;

[0052] S5. Installation of connection components:

[0053] Install the connection component 7 and anchor and fix the vertical connecting steel bar assembly 5 and the vertical pouring steel bar assembly 6 together;

[0054] S6. Opening of pouring holes:

[0055] Open pouring holes 12 on the precast building concrete wall 1 above the first columnar notch 11, and make the pouring holes 12 penetrate into the first columnar notch 11;

[0056] S7. Pouring of connecting columns:

[0057] Pour concrete into the first columnar notch 11 and the second columnar notch 23 through the pouring holes 12, and make the concrete completely wrap the horizontal connecting steel bar assembly 4, the vertical connecting steel bar assembly 5, the vertical pouring steel bar assembly 6 and the connection component 7. After the cured concrete is cured, the cast-in-place connecting column 3 is formed, thus completing the entire construction process of the connection node of the prefabricated building.

[0058] It can be understood that the arrangement methods of the horizontal connecting steel bar assembly 4, the vertical connecting steel bar assembly 5, the vertical pouring steel bar assembly 6, and the connection component 7 can be various, as long as they can form a steel bar framework as a whole. However, considering the improvement of the fixing strength and stability at the connection node, as well as the convenience of construction and the economy of material use, the present invention can adopt the following preferred implementation modes.

[0059] In some preferred embodiments, there are at least two sets of transverse connecting steel bar assemblies 4 in the columnar notch one 11 and the transverse connecting steel bar assemblies 4 in the columnar notch two 23, and they are located at different height plane positions. Adopting this structural form can strengthen the connection strength between the precast building concrete wall 1, the precast ring beam 2 and the cast-in-place connecting column 3.

[0060] In some preferred embodiments, each set of transverse connecting steel bar assemblies 4 is composed of a V-shaped outer steel bar 41 and a V-shaped inner steel bar 42 in the same height plane. The two ends of the V-shaped outer steel bar 41 and the two ends of the V-shaped inner steel bar 42 of the precast building concrete wall 1 are respectively precast and anchored on two adjacent side surfaces in the columnar notch one 11, and the two ends of the V-shaped outer steel bar 41 and the two ends of the V-shaped inner steel bar 42 of the precast ring beam 2 are respectively precast and anchored on two adjacent side surfaces in the columnar notch two 23.

[0061] In some preferred embodiments, the top of the vertical connecting bar assembly 5 is precast and anchored in the precast building concrete wall 1, and the bottom end is suspended in the columnar notch one 11. The vertical connecting bar assembly 5 is composed of five vertical connecting bars 51 arranged in a regular pentagon, and the vertical pouring bar assembly 6 is composed of five vertical pouring bars 61 arranged in a regular pentagon. The five vertical connecting bars 51 and the five vertical pouring bars 61 correspond one by one.

[0062] In some preferred embodiments, the included angles of the V-shaped outer steel bar 41 and the V-shaped inner steel bar 42 are both 108°. Three of the five vertical connecting bars 51 are arranged inside the V-shaped outer steel bar 41 and are welded or tied to the V-shaped outer steel bar 41, and the other two of the five vertical connecting bars 51 are arranged inside the V-shaped inner steel bar 42 and are welded or tied to the V-shaped inner steel bar 42; three of the five vertical pouring bars 61 are arranged inside the V-shaped outer steel bar 41 and are welded or tied to the V-shaped outer steel bar 41, and the other two of the five vertical pouring bars 61 are arranged inside the V-shaped inner steel bar 42 and are welded or tied to the V-shaped inner steel bar 42.

[0063] In some preferred embodiments, the connection assembly 7 includes an anchor sleeve 71, a connecting rod 73, a cable 74 and a lock 75. There are five anchor sleeves 71 which are respectively sleeved and fixed at the connection parts of the five vertical connecting bars 51 and the five vertical pouring bars 61. There are five connecting rods 73 which are respectively arranged between two adjacent anchor sleeves 71. The lock 75 is arranged inside the area surrounded by the five anchor sleeves 71. There are five cables 74. One ends of the five cables 74 are all installed in the lock 75, and the other ends are respectively fixedly connected to the five anchor sleeves 71. The specific connection and fixing methods of the cable 74 and the connecting rod 73 can adopt the general technology in the field.

[0064] In some preferred embodiments, the connection assembly 7 also includes special-shaped nuts 72, which are provided in five groups and correspond to the five anchor sleeves 71 respectively, and each group of special-shaped nuts 72 is provided with two and are respectively arranged at both ends of the anchor sleeve 71; each special-shaped nut 72 is composed of a flared end located at its first axial end and a straight tube end located at its second axial end, the inner wall of the flared end of the special-shaped nut 72 is in contact with the outer wall of the end of the anchor sleeve 71, and the internal thread provided at the straight tube end of the special-shaped nut 72 corresponds to the connecting bar external thread 52 provided at the lower end of the vertical connecting bar 51 and the casting bar external thread 62 provided at the upper end of the vertical casting bar 61 (that is, one of the special-shaped nuts 72 in the same group is used to connect with the connecting bar external thread 52, and the other special-shaped nut 72 is used to connect with the casting bar external thread 62); the connection between the anchor sleeve 71 and the vertical connecting bar 51 and the connection between the anchor sleeve 71 and the vertical casting bar 61 are respectively connected and fixed by the special-shaped nuts 72.

[0065] In some preferred embodiments, the connection points of the five vertical connecting bars 51 and the five vertical casting bars 61 are arranged at different heights (that is, equivalent to the anchor sleeves 71 being arranged at different heights); the five anchor sleeves 71 are arranged in a regular pentagon in the horizontal plane projection, that is, equivalent to the five anchor sleeves 71 being located at the five vertices of the pentagon. In this preferred embodiment, the lengths of the five connecting rods 73 can also be set to be different, but the length of the longest connecting rod 73 does not exceed twice the length of the shortest connecting rod 73, so as to ensure that the connecting rod 73 as a whole has sufficient strength.

[0066] The overall structure of the present invention is simple and compact. By arranging a vertical connecting rib assembly 5 and a vertical casting rib assembly 6 and anchoring them together through a connecting assembly 7, and then pouring concrete together with a transverse connecting steel bar assembly 4 to form a cast-in-place connecting column 3, the prefabricated building concrete wall 1 and the prefabricated ring beam 2 are connected and fixed. The installation is convenient and quick, and the connection and fixing strength between the prefabricated assembled building and the prefabricated ring beam 2 is improved, and the problem of easy corrosion of metal anchors such as bolts is avoided. The overall structure has good stability and high strength. In extreme cases such as earthquakes and mudslides, the overall building is not easy to shift and is safe and reliable.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A prefabricated and assembled building connection node, comprising a prefabricated building concrete wall (1) and a prefabricated ring beam (2), wherein the bottom end surface of the prefabricated building concrete wall (1) is fixedly arranged on the upper surface of the prefabricated ring beam (2), characterized in that: The bottom end surface of the prefabricated building concrete wall (1) is provided with a plurality of positioning limit holes, the upper surface of the prefabricated ring beam (2) is provided with a plurality of limit column mounting holes (24), the limit columns (13) are mounted in the limit column mounting holes (24), and the top ends of the limit columns (13) are respectively correspondingly engaged in the positioning limit holes; a columnar notch (11) is provided at the bottom of the right-angled corner of the outer wall of the prefabricated building concrete wall (1), and a through hole (11) is provided on the prefabricated building concrete wall (1) above the columnar notch (11). A casting hole (12) is inserted into the first columnar notch (11); a second columnar notch (23) is provided at a right angle corner of the outer wall of the prefabricated ring beam (2); the prefabricated building concrete wall (1) and the prefabricated ring beam (2) are fixedly connected by a cast-in-place connecting column (3), and the lower end of the cast-in-place connecting column (3) is embedded in the ground below the prefabricated ring beam (2); the cast-in-place connecting column (3) is formed by pouring concrete into the first columnar notch (11) and the second columnar notch (23) through the casting hole (12); A transverse connecting steel bar assembly (4) is disposed in each of the columnar notch 1 (11) and the columnar notch 2 (23), and prefabricated anchoring ends of the transverse connecting steel bar assembly (4) are disposed in the prefabricated building concrete wall (1) and the prefabricated ring beam (2) respectively; A vertical connecting bar assembly (5) is arranged in the first columnar notch (11) and is fixed to the transverse connecting steel bar assembly (4) in the first columnar notch (11); a vertical casting bar assembly (6) is arranged in the second columnar notch (23) and is fixed to the transverse connecting steel bar assembly (4) in the second columnar notch (23); the vertical connecting bar assembly (5) and the vertical casting bar assembly (6) are connected via a connecting assembly (7); the transverse connecting steel bar assembly (4), the vertical connecting bar assembly (5), the vertical casting bar assembly (6) and the connecting assembly (7) are all arranged in a cast-in-place connecting column (3).

2. The prefabricated building connection node according to claim 1, characterized in that: At least one of the upper end of the limiting column (13) and the outer end of the positioning limiting hole is provided with a guiding inclined surface or a guiding arc surface arranged in a ring shape.

3. The prefabricated building connection node according to claim 1, characterized in that: At least two groups of transverse connecting steel bar assemblies (4) in the first columnar notch (11) and the second columnar notch (23) are provided, and are located at different height plane positions.

4. The prefabricated building connection node according to claim 3, characterized in that: Each group of transverse connecting steel bar components (4) is composed of V-shaped outer bars (41) and V-shaped inner bars (42) located in the same height plane. The two ends of the V-shaped outer bars (41) and the two ends of the V-shaped inner bars (42) of the precast building concrete wall (1) are respectively precast and anchored on two adjacent side surfaces in the first columnar notch (11). The two ends of the V-shaped outer bars (41) and the two ends of the V-shaped inner bars (42) of the precast ring beam (2) are respectively precast and anchored on two adjacent side surfaces in the second columnar notch (23).

5. The prefabricated building connection node according to claim 4, characterized in that: The top of the vertical connecting bar assembly (5) is prefabricated and anchored in the prefabricated building concrete wall (1), and the bottom is suspended in the columnar notch (11); the vertical connecting bar assembly (5) is composed of five vertical connecting bars (51) arranged in a regular pentagon, and the vertical casting bar assembly (6) is composed of five vertical casting bars (61) arranged in a regular pentagon, and the five vertical connecting bars (51) correspond to the five vertical casting bars (61) one by one.

6. The prefabricated building connection node according to claim 5, characterized in that: The included angles of the V-shaped outer reinforcement (41) and the V-shaped inner reinforcement (42) are both 108°. Three of the five vertical connecting reinforcements (51) are arranged on the inner side of the V-shaped outer reinforcement (41) and are welded or tied to the V-shaped outer reinforcement (41). The other two of the five vertical connecting reinforcements (51) are arranged on the inner side of the V-shaped inner reinforcement (42) and are welded or tied to the V-shaped inner reinforcement (42). Three of the five vertical casting reinforcements (61) are arranged on the inner side of the V-shaped outer reinforcement (41) and are welded or tied to the V-shaped outer reinforcement (41). The other two of the five vertical casting reinforcements (61) are arranged on the inner side of the V-shaped inner reinforcement (42) and are welded or tied to the V-shaped inner reinforcement (42).

7. The prefabricated building connection node according to claim 5, characterized in that: The connection assembly (7) comprises an anchor sleeve (71), a connecting rod (73), a cable (74) and a lock (75); five anchor sleeves (71) are provided and are respectively sleeved and fixed at the connection between five vertical connecting bars (51) and five vertical cast bars (61); five connecting rods (73) are provided and are respectively provided between two adjacent anchor sleeves (71); the lock (75) is provided inside the area surrounded by the five anchor sleeves (71); five cables (74) are provided, one end of each of the five cables (74) is installed in the lock (75) and the other end is respectively fixedly connected to the five anchor sleeves (71).

8. The prefabricated building connection node according to claim 7, characterized in that: The connection assembly (7) further comprises special-shaped nuts (72). Five groups of special-shaped nuts (72) are provided and correspond to the five anchor sleeves (71) respectively. Two special-shaped nuts (72) are provided in each group and are respectively provided at the two ends of the anchor sleeve (71). Each special-shaped nut (72) comprises a flared end located at the first axial end thereof and a straight tube end located at the second axial end thereof. The inner wall of the flared end of the special-shaped nut (72) fits the outer wall of the end of the anchor sleeve (71). The inner thread provided at the straight tube end of the special-shaped nut (72) corresponds to the outer thread (52) of the connecting bar provided at the lower end of the vertical connecting bar (51) and the outer thread (62) of the casting bar provided at the upper end of the vertical casting bar (61). The connection between the anchor sleeve (71) and the vertical connecting bar (51) and the connection between the anchor sleeve (71) and the vertical casting bar (61) are respectively connected and fixed by the special-shaped nuts (72).

9. The prefabricated building connection node according to claim 7, characterized in that: The connection points between the five vertical connection bars (51) and the five vertical casting bars (61) are arranged at different heights; and the five anchor sleeves (71) are arranged in a regular pentagon in horizontal plane projection.

10. A construction method for a prefabricated building connection node, characterized in that: The prefabricated and assembled building connection node is implemented based on any one of claims 1 to 9, and includes the following steps: S1. Prefabricated buildings: The columnar notch (11) space is left vacant by installing the template, and then the transverse connecting steel bar assembly (4), the vertical connecting bar assembly (5) and the steel bars in the prefabricated building concrete wall (1) are laid and tied, so that the transverse connecting steel bar assembly (4) and the vertical connecting bar assembly (5) penetrate into the columnar notch (11) space, and positioning limit holes are reserved by the mold; finally, concrete is poured, so as to construct the prefabricated building concrete wall (1) and assemble it into the required prefabricated building; S2. Ring beam prefabrication: The second column gap (23) space is left vacant through the template, and then the transverse connecting steel bar assembly (4) in the second column gap (23) and the steel bars in the prefabricated ring beam (2) are laid and tied, so that the transverse connecting steel bar assembly (4) penetrates into the second column gap (23) space, and the limit column installation hole (24) is reserved through the mold; finally, concrete is poured, thereby constructing the prefabricated ring beam (2); S3. Hoisting of prefabricated buildings: The limiting columns (13) are installed one by one in the limiting column installation holes (24) preset on the prefabricated ring beam (2); the assembled building obtained in step S1 is then hoisted onto the prefabricated ring beam (2) obtained in step S2, so that the top ends of the limiting columns (13) are all engaged in the corresponding positioning limiting holes; S4. Column pit excavation and reinforcement binding: A column pit is excavated on the ground at the position of the second columnar notch (23) of the prefabricated ring beam (2); the vertical casting reinforcement assembly (6) is then laid and tied so that the vertical casting reinforcement assembly (6) corresponds to the vertical connecting reinforcement assembly (5) and the ends of the two are closely attached to each other; finally, the vertical connecting reinforcement assembly (5) and the vertical casting reinforcement assembly (6) are respectively welded or tied to the corresponding transverse connecting reinforcement assembly (4); S5. Installation of connection components: The connection assembly (7) is installed, and the vertical connection reinforcement assembly (5) and the vertical casting reinforcement assembly (6) are anchored and fixed together; S6. Casting hole opening: A casting hole (12) is opened on the prefabricated building concrete wall (1) above the columnar notch (11), and the casting hole (12) is penetrated into the columnar notch (11); S7. Connecting column casting: Concrete is poured into the columnar notch 1 (11) and the columnar notch 2 (23) through the pouring hole (12), and the concrete completely wraps the transverse connecting steel bar assembly (4), the vertical connecting bar assembly (5), the vertical pouring bar assembly (6) and the connecting assembly (7). After the poured concrete is cured, a cast-in-place connecting column (3) is formed, thereby completing the entire construction process of the prefabricated and assembled building connection node.

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