A connection structure of precast concrete walls

Abstract

The present invention relates to the technical field of building prefabricated parts, and specifically to a connection structure for a prefabricated concrete wall, comprising a prefabricated wall body, grooves formed on both sides and the top of the prefabricated wall body, each groove extending along the length direction of the corresponding side of the prefabricated wall body, side connection assemblies provided on both sides of the prefabricated wall body, the side connection assemblies being used to connect to the reinforcement bundles of floor beams and columns, a bottom connection member provided on the bottom side of the prefabricated wall body, the bottom connection member being connected to the floor or the lower wall, and a top connection member provided on the top side of the prefabricated wall body, the top connection member being connected to the upper wall or the top structure. The side connection assemblies and the top connection assemblies of the present invention can be completely embedded and stored in the grooves when not in construction, eliminating the protruding structure of traditional connection members, effectively avoiding damage to the connection members caused by collisions during transportation, stacking, and hoisting, while reducing space occupancy during transportation and optimizing the economy of storage and transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of building prefabricated parts, in particular to a connection structure of prefabricated concrete walls. Background Art

[0002] Precast concrete walls are wall components formed by pre-casting reinforced concrete through molds in the factory. After being cured to meet the standards, they are transported to the construction site and installed in place through hoisting, connection, and other methods. They have the characteristics of stable quality, efficient construction, reduction of on-site wet work and dust pollution, and easy integration of insulation and decorative functions. They are widely used in the interior and exterior walls of residential, office buildings and other buildings. They are common enclosure or load-bearing components in precast concrete structures.

[0003] Precast concrete walls are equipped with connectors on all four sides. The bottom connector is used to connect to the reserved steel bars on the ground or floor, the top connector is used to connect to the floor slab or upper precast wall, and the side connectors are used to connect to the adjacent precast wall or building structure. The side connectors of traditional precast concrete walls are embedded in the concrete during the pouring process. After the wall is formed, these connectors may extend outward from the side of the wall, forming protrusions. On the one hand, these protrusions are prone to damage due to collisions during transportation, stacking, or lifting, which not only affects the structural performance of the connectors themselves, but may also cause damage to the edges and corners of the wall. In addition, the protrusions take up additional space, increase the inconvenience and cost of storage and transportation, and may affect the sealing and structural integrity of the assembled wall. Summary of the Invention

[0004] The object of the present invention is to provide a connection structure of precast concrete walls to solve the technical problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A connection structure of a precast concrete wall includes a precast wall body, grooves are formed on both sides and the top of the precast wall body, each groove extends along the length direction of the corresponding side of the precast wall body, side connection components are provided on the left and right sides of the precast wall body, the side connection components are used to connect with the floor beam and column steel bar bundles, a bottom connection piece is provided on the bottom side of the precast wall body, the bottom connection piece is connected to the floor or the lower wall, a top connection piece is provided on the top side of the precast wall body, the top connection piece is connected to the upper wall or the top structure, the bottom connection piece remains flush with the bottom surface of the precast wall body, when not in construction, the side connection piece and the top connection piece are embedded and stored in the corresponding grooves, when in construction, the side connection piece and the top connection piece can be movably extended and adjusted, and extend to the outside of the groove to form a protruding connection structure, a grouting system is preset in the precast wall body, the grouting system is used to transport grouting slurry to the side connection piece, the top connection piece and the bottom connection piece.

[0007] Preferably, the side connection assembly includes side inserts and side connecting steel bars. Two rows of side inserts are embedded on the left and right sides of the prefabricated wall body during prefabrication and pouring. The end faces of the side inserts remain parallel to the inner end walls of the corresponding side grooves. The side inserts on the same side correspond to each other in two positions to form an insert group A. The side connecting steel bars are M-shaped structures, and the two straight ends are respectively inserted into the two side inserts in the insert group A. The side connecting steel bars can be slid and adjusted along the axial direction of the side inserts when not pouring. When the side connecting steel bars are retracted and adjusted to the extreme position, the side connecting steel bars can be completely embedded and accommodated in the groove.

[0008] Preferably, the top connection assembly includes a top insert and a top connecting steel bar. Two rows of top inserts are embedded in the top side of the prefabricated wall body during prefabrication and pouring. The end faces of the top inserts remain parallel to the inner end walls of the corresponding grooves. The top inserts correspond to each other in pairs. The top connecting steel bars are long and straight and are inserted one by one into the corresponding top inserts. When the top connecting steel bars are not poured, they can be slid and adjusted along the axial direction of the top insert. When the top connecting steel bars are retracted and adjusted to the extreme position, the top connecting steel bars can be completely embedded and accommodated in the groove.

[0009] Preferably, the bottom connecting member adopts a bottom insert tube, and two rows of bottom insert tubes are embedded in the bottom side of the prefabricated wall body during prefabrication and pouring. The end face of the bottom insert tube is kept flush with the bottom end of the prefabricated wall body, and the bottom insert tube is inserted and matched with the connecting steel bars reserved in the floor or the top connecting steel bars on the top of the lower wall.

[0010] Preferably, the pouring system includes two pouring pipes, which are rectangular in shape and consistent with the prefabricated wall body, and are connected at both ends. The two pouring pipes are symmetrically cast and embedded in the prefabricated wall body, and are correspondingly connected with the corresponding rows of side inserts, top inserts and bottom inserts. Pouring holes are respectively distributed on the two large surfaces of the prefabricated wall body, and inlets are evenly distributed on the two pouring pipes. The pouring holes are connected to the inlets one by one.

[0011] Preferably, when the top connecting steel bar is inserted into the top insert tube to the limit position, the inner end portion of the top connecting steel bar contacts the inner wall of the grouting pipe.

[0012] Preferably, the internal holes of the side insert tube and the top insert tube are stepped holes composed of small-diameter holes and large-diameter holes, and the small-diameter holes are located at the outside. The insertion ends of each side connecting steel bar and the top connecting steel bar are provided with a clamping and anti-slipping mechanism, and the clamping and anti-slipping mechanism cooperates with the step formed between the small-diameter hole and the large-diameter hole to prevent the side connecting steel bar from falling out of the side insert tube and the top connecting steel bar from falling out of the top insert tube.

[0013] Preferably, the clamping and anti-slip mechanism includes an end, a rotating shaft and several clamping arms. The insertion ends of each side connecting steel bar and the top connecting steel bar are coaxially fixed with an end. Four side grooves are opened on each end, and mounting holes are provided on the inner walls of both sides of each side groove. The rotating shafts are correspondingly arranged in the side grooves, and the two ends are correspondingly inserted in the mounting holes and elastically connected to the inner walls of the mounting holes through vortex springs. A clamping arm is fixed on each rotating shaft. After the side connecting steel bars and the top connecting steel bars pass through the step holes, the elastic force of the vortex spring pulls the clamping arm to unfold and cooperate with the step to achieve clamping and blocking.

[0014] Preferably, mounting grooves are distributed on the inner wall of each small-diameter hole, and balls are embedded in each mounting groove. The mounting groove has an arc-shaped portion adapted to the balls near the inner wall of the small-diameter hole. A support spring is fixed on the inner end wall of each mounting groove, and the other end of the support spring contacts the balls. Part of each ball is exposed into the small-diameter hole and contacts and cooperates with the side connecting steel bars and the top connecting steel bars respectively.

[0015] Preferably, the connection structure of the precast concrete wall is used as follows:

[0016] Insert the side connecting steel bars into the two side insert tubes in the insert tube group A to the limit position, so that the side connecting steel bars are received in the grooves on the corresponding sides; insert the top connecting steel bars into the top insert tube to the limit position, so that the top connecting steel bars are received in the grooves on the corresponding sides;

[0017] The prefabricated wall body equipped with the side connecting steel bars and the top connecting steel bars is transported to the construction site, and the side connecting steel bars are slid out until the extended clamping arms contact the steps in the side inserts, and the top connecting steel bars are slid out until the extended clamping arms contact the steps in the top inserts;

[0018] Use a lifting device to lift the prefabricated wall body. Insert the vertical steel bars in the reinforcement bundle on the floor through the side connecting steel bars and secure them with wire. At least three vertical steel bars are located at the three corners of the M portion of the side connecting steel bars. At the same time, align the reserved connecting steel bars on the floor or the top connecting steel bars on the top of the lower wall and insert them into the bottom insert tube.

[0019] The slurry is poured simultaneously through each pouring hole, and flows into the pouring pipe through the inlet, and is finally distributed to each side insert tube, top insert tube and bottom insert tube. After solidification, the fixed connection of the prefabricated wall body is realized. Among them, the unfolded clamping arms form a cross-shaped frame. After the slurry is fixed, the connection between the side connecting steel bars and the side insert tubes, and the connection between the top insert tube and the top connecting steel bars is reinforced.

[0020] Compared with the prior art, the present invention has the following beneficial effects.

[0021] The side connection components and top connection components can be completely embedded and stored in the grooves when not in construction, eliminating the protruding structure of traditional connectors. This can effectively avoid damage to the connectors caused by collisions during transportation, stacking and lifting, while reducing space occupancy during transportation and optimizing the economy of storage and transportation.

[0022] The slurry is transported to the grouting pipe through the grouting holes and inlet, and then diverted to the side inserts, top inserts and bottom inserts, so that the slurry evenly fills the connection gaps. After solidification, it forms an overall force-bearing structure, improving the integrity and sealing of the connection nodes, and avoiding leakage and insufficient strength caused by uneven slurry filling in traditional connections.

[0023] The bottom insert is flush with the bottom side of the prefabricated wall body, and can accurately insert the reserved floor steel bars or the lower top connecting steel bars, ensuring the flatness and fit of the bottom connection, reducing the installation gap, and enhancing the stability of vertical force transmission.

[0024] The unfolded holding arm is not only used to hold and prevent the side connecting steel bars or the top connecting steel bars from falling out, but also acts as a cross-shaped frame, cooperating with the solidified slurry to increase the mechanical bite force between the side connecting steel bars and the side inserts, and the top connecting steel bars and the top inserts, thereby improving the shear resistance and durability of the connection nodes, strengthening the collaborative working ability of the overall structure, and making up for the defect of insufficient bonding strength between the steel bars and the slurry in traditional connections.

[0025] The grooves can be filled with concrete after the walls are spliced, so that the subsequent solidified bodies are embedded in the grooves to form a riveted structure, thereby increasing the contact area and mechanical bite force between the walls, and improving the sealing and overall rigidity after splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0027] Figure 2 for Figure 1 Another perspective diagram of the structure shown;

[0028] Figure 3 for Figure 1 One of the schematic cross-sectional views of the structure shown;

[0029] Figure 4 for Figure 1 The second schematic cross-sectional view of the structure shown;

[0030] Figure 5 for Figure 1 The structure shown omits the schematic diagram of the prefabricated wall body;

[0031] Figure 6 This is a schematic diagram of the connection between the perfusion system and each insert structure in the present invention;

[0032] Figure 7 This is a schematic diagram of the side connecting steel bar structure in the present invention;

[0033] Figure 8 This is a schematic diagram of the top connecting steel bar structure in the present invention;

[0034] Figure 9 Schematic diagram of the structure of the card holding and anti-slipping mechanism in the present invention;

[0035] Figure 10 for Figure 9 A schematic diagram of the structure at center A;

[0036] Figure 11 This is a schematic diagram of the coordination between the side connecting steel bars and the side insert tube structure;

[0037] Figure 12 This is a schematic diagram of the coordination between the top connecting steel bars and the top insert tube structure;

[0038] Figure 13 Schematic diagram of the engagement between the anti-slip mechanism and the step hole in the present invention;

[0039] Figure 14 for Figure 13 A magnified schematic diagram of the structure at point B in the middle;

[0040] Figure 15 This is a schematic diagram of the coordination between the side connecting steel bars and the vertical steel bar structure.

[0041] In the figure: 01, small diameter hole; 02, large diameter hole; 03, vertical steel bar; 1, prefabricated wall body; 11, groove; 12, pouring hole; 2, side connection assembly; 21, side insert; 22, side connecting steel bar; 3, top connection assembly; 31, top insert; 32, top connecting steel bar; 4, bottom connection piece; 41, bottom insert; 5, pouring system; 51, pouring pipe; 52, inlet; 6, clamping and anti-slip mechanism; 61, end; 611, side groove; 612, mounting hole; 62, rotating shaft; 63, scroll spring; 64, clamping arm; 7, ball; 71, mounting groove; 711, arc-shaped portion; 72, support spring. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0044] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0045] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0046] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0047] Example 1

[0048] See also Figures 1-15The present invention provides a connection structure of a precast concrete wall, comprising a precast wall body 1, a side connection assembly 2, a top connection assembly 3 and a bottom connection piece 4. The precast wall body 1 is a precast part and is manufactured in a factory by using a mold casting construction. Grooves 11 are pre-formed on both sides and the top of the precast wall body 1. Each groove 11 extends along the length direction of the corresponding side of the precast wall body 1 and has a depth of 45-50 mm. When not in construction, the side connection assembly 2 and the top connection assembly 3 are embedded in the corresponding groove 11. During construction, the side connection assembly 2 and the top connection assembly 3 can be flexibly extended and adjusted and extend to the outside of the groove 11 to form a protruding connection structure. A grouting system 5 is preset in the precast wall body 1. The grouting system 5 is used to transport grouting slurry to the side connection assembly 2, the top connection assembly 3 and the bottom connection piece 4.

[0049] like Figure 3 and Figure 11 As shown, side connection components 2 are provided on both sides of the precast wall body 1. The side connection components 2 are used to connect with the floor beam and column reinforcement bundles. Specifically, the side connection components 2 include side inserts 21 and side connection reinforcements 22. Two rows of side inserts 21 are pre-embedded on both sides of the precast wall body 1 during precast pouring. The end faces of the side inserts 21 remain parallel to the inner end walls of the corresponding side grooves 11. The side inserts 21 on the same side correspond to each other in pairs to form an insert group A. The side connection reinforcement 22 is an M-shaped structure, and the two straight ends are respectively inserted into the two side inserts 21 in the insert group A, that is, the side inserts 21 are embedded parts. After the poured concrete material solidifies, they are integrally formed and fixed with the precast wall body 1, and the side connection reinforcement 22 are assembly parts. They are made in the factory using construction reinforcement bars according to the model and size of the side connection reinforcement 22.

[0050] Among them, the side connecting steel bars 22 can be slid and adjusted along the axial direction of the side inserts 21 when not pouring. When the side connecting steel bars 22 are retracted and adjusted to the extreme position, the side connecting steel bars 22 can be completely embedded and stored in the groove 11, that is, the side connecting steel bars 22 can be inserted and assembled in the side inserts 21 at a later time, and the side connecting steel bars 22 can be slid and adjusted in the side inserts 21. During transportation and transfer, the side connecting steel bars 22 can be retracted and adjusted into the groove 11 to achieve embedded storage. During construction, the side connecting steel bars 22 can be slid and pulled out.

[0051] In addition, the aperture of the side insert 21 is larger than the diameter of the side connecting steel bar 22, ensuring that the grouting slurry can pass through the gap smoothly and be reliably fixed after the slurry solidifies.

[0052] A top connection assembly 3 is provided on the top side of the prefabricated wall body 1, and the top connection assembly 3 is connected to the upper wall or the top structure. The top connection assembly 3 includes a top insert 31 and a top connection steel bar 32. Two rows of top inserts 31 are embedded in the top side of the prefabricated wall body 1 during prefabrication and pouring. The end faces of the top inserts 31 remain parallel to the inner end walls of the corresponding grooves 11. The top inserts 31 correspond to each other in twos. The top connection steel bars 32 are long and straight and are inserted one by one into the corresponding top inserts 31, that is, the top connection steel bars 32 are embedded parts. After the poured concrete material solidifies, they are integrally formed and fixed with the prefabricated wall body 1. Similarly, the top insert 31 is an assembly part, which is made in the factory using construction steel bars for specific processing according to the model and size of the top connection steel bars 32.

[0053] Among them, the top connecting steel bar 32 can be slid and adjusted along the axial direction of the top insert tube 31 when not pouring. When the top connecting steel bar 32 is retracted and adjusted to the extreme position, the top connecting steel bar 32 can be completely embedded and stored in the groove 11, that is, the top connecting steel bar 32 can be inserted and assembled in the top insert tube 31 at a later time, and the top connecting steel bar 32 can be slid and adjusted in the top insert tube 31. During transportation and transfer, the top connecting steel bar 32 can be retracted and adjusted into the groove 11 to achieve embedded storage. During construction, the top connecting steel bar 32 can be slid and pulled out.

[0054] In addition, the aperture of the top insert 31 is larger than the diameter of the top connecting steel bar 32, ensuring that the grouting slurry can pass through the gap smoothly and be reliably fixed after the slurry solidifies.

[0055] A bottom connector 4 is provided on the bottom side of the prefabricated wall body 1, which is connected to the floor or the lower wall. The bottom connector 4 adopts a bottom insert 41. Two rows of bottom inserts 41 are embedded in the bottom side of the prefabricated wall body 1 during prefabrication and pouring. That is, the bottom inserts 41 are embedded parts. After the poured concrete material solidifies, they are integrally formed and fixed with the prefabricated wall body 1, and the end face of the bottom insert 41 remains flush with the bottom end of the prefabricated wall body 1, and will not extend from the side of the prefabricated wall body 1 to form a protrusion and affect transportation.

[0056] The bottom insert 41 is inserted into and matched with the connecting steel bars reserved on the floor or the top connecting steel bars 32 on the top of the lower wall. During actual construction, the connecting steel bars reserved on the floor or the top connecting steel bars 32 on the top of the lower wall are aligned and inserted into the bottom insert 41. The diameters of the connecting steel bars and the top connecting steel bars 32 are smaller than the aperture of the bottom insert 41, so that the slurry can flow through the gap between the bottom insert 41 and the connecting steel bars or the top connecting steel bars 32 during pouring, thereby ensuring the fixing effect after the slurry solidifies.

[0057] Example 2

[0058] See also Figure 3-Figure 6 The difference between this embodiment and embodiment 1 is that:

[0059] The pouring system 5 includes two pouring pipes 51. The pouring system 5 is rectangular in shape and consistent with the prefabricated wall body 1, and is connected at both ends. The two pouring pipes 51 are symmetrically cast and embedded in the prefabricated wall body 1, and are correspondingly connected to the corresponding rows of side inserts 21, top inserts 31 and bottom inserts 41. Pouring holes 12 are evenly distributed on the two large surfaces of the prefabricated wall body 1, and inlets 52 are evenly distributed on the two pouring pipes 51. The pouring holes 12 are connected to the inlets 52 one by one. The slurry is poured simultaneously through the pouring holes 12, and the slurry flows into the pouring pipe 51 through the inlet 52, and is finally diverted to the side inserts 21, top inserts 31 and bottom inserts 41. After solidification, the prefabricated wall body 1 is fixedly connected to the surrounding building structure.

[0060] In addition, when the top connecting steel bar 32 is inserted into the top insert tube 31 to the limit position, the inner end of the top connecting steel bar 32 contacts the inner wall of the grouting tube 51, preventing the top connecting steel bar 32 from being too deep into the top insert tube 31 and unable to be pulled outward.

[0061] Example 3

[0062] Please refer to the figure Figure 7-13 The difference between this embodiment and embodiment 2 is that:

[0063] Specifically, the internal holes of the side insert 21 and the top insert 31 are stepped holes composed of a small-diameter hole 01 and a large-diameter hole 02, and the small-diameter hole 01 is located at an outer position. The insertion ends of each side connecting steel bar 22 and the top connecting steel bar 32 are provided with a clamping anti-slip mechanism 6, which blocks the step formed between the small-diameter hole 01 and the large-diameter hole 02.

[0064] Specifically, the clamping and anti-slip mechanism 6 includes an end 61, a rotating shaft 62 and a plurality of clamping arms 64. The insertion ends of each side connecting steel bar 22 and the top connecting steel bar 32 are coaxially fixed with an end 61. Four side grooves 611 are opened on each end 61. A mounting hole 612 is provided on the inner wall of each side groove 611. The rotating shaft 62 is correspondingly arranged in the side groove 611, and the two ends are correspondingly inserted in the mounting holes 612, and are elastically connected to the inner wall of the mounting hole 612 through a spiral spring 63. A clamping arm 64 is fixed on each rotating shaft 62.

[0065] When the side connecting steel bars 22 are inserted into the side insert tubes 21 and the top connecting steel bars 32 are inserted into the top insert tube 31, the clamping arms 64 overcome the elastic force of the spiral spring 63 under the resistance and squeezing action of the inner wall of the small-diameter hole 01, and swing back to the side groove 611, so that the clamping anti-slip mechanism 6 has a circular structure as a whole, so that it can pass through the small-diameter hole 01 smoothly. At this time, the spiral spring 63 accumulates force;

[0066] After the side connecting steel bars 22 and the top connecting steel bars 32 pass through the step holes respectively, under the elastic reset action of the spiral spring 63, the clamping arms 64 are pulled to expand to form a cross-shaped structure, which cooperates with the steps to achieve clamping and blocking to prevent the side connecting steel bars 22 from falling out of the side insert 21 and the top connecting steel bars 32 from falling out of the top insert 31.

[0067] In addition, after the poured slurry solidifies, the cross-shaped structure formed by the clamping arms 64 also serves as a skeleton frame, increasing the contact area between the side connecting steel bars 22 and the top connecting steel bars 32 and the solidified slurry, thereby increasing the overall firmness, killing two birds with one stone.

[0068] Example 4

[0069] See also Figure 14 The difference between this embodiment and embodiment 3 is that:

[0070] Specifically, each small-diameter hole 01 is evenly distributed with an installation groove 71 on the inner wall, and each installation groove 71 is embedded with a ball 7. The installation groove 71 has an arc-shaped portion 711 adapted to the ball 7 near the inner wall of the small-diameter hole 01. A support spring 72 is fixed on the inner end wall of each installation groove 71, and the other end of the support spring 72 corresponds to the contact with the ball 7. Part of each ball 7 is exposed in the small-diameter hole 01, and contacts and cooperates with the side connecting steel bar 22 and the top connecting steel bar 32 respectively.

[0071] When the side connecting steel bars 22 are inserted into the side insert tube 21 and the top connecting steel bars 32 are inserted into the top insert tube 31, the ball 7 rolls when in contact with the side connecting steel bars 22 or the top connecting steel bars 32, ensuring that the side connecting steel bars 22 and the top connecting steel bars 32 can be adjusted more smoothly. At the same time, the support spring 72 is used to elastically support the ball 7, so that the ball 7 can adaptively fluctuate according to the texture of the outer wall of the side connecting steel bars 22 and the top connecting steel bars 32 to avoid jamming.

[0072] Example 5

[0073] This embodiment provides a method for using a connection structure of a precast concrete wall, which is specifically as follows:

[0074] Insert the side connecting steel bars 22 into the two side insert tubes 21 in the insert tube group A to the limit position, so that the side connecting steel bars 22 are received in the grooves 11 on the corresponding sides, and insert the top connecting steel bars 32 into the top insert tubes 31 to the limit position, so that the top connecting steel bars 32 are received in the grooves 11 on the corresponding sides;

[0075] The prefabricated wall body 1 equipped with the side connecting steel bars 22 and the top connecting steel bars 32 is transported to the construction site, and the side connecting steel bars 22 are slid out until the extended holding arms 64 contact the step in the side insert 21, and the top connecting steel bars 32 are slid out until the extended holding arms 64 contact the step in the top insert 31;

[0076] The prefabricated wall body 1 is hoisted by a hoisting device so that the vertical steel bars 03 in the beam and column steel bar bundles on the floor are inserted into the side connecting steel bars 22 and fixed with wires. Figure 15 As shown, at least three vertical steel bars 03 are respectively located at the three corners of the side connecting steel bars 22M (two vertical steel bars 03 are supported at the corners on both sides of the side connecting steel bars 22, and one vertical steel bar 03 is supported at the middle corner, supporting the side connecting steel bars 22 from the inside and outside to ensure the firmness of the connection). At the same time, the connecting steel bars reserved on the floor or the top connecting steel bars 32 on the top of the lower wall are aligned and inserted into the bottom insert tube 41;

[0077] The slurry is poured simultaneously through each pouring hole 12, and flows into the pouring pipe 51 through the inlet 52, and is finally divided into each side insert 21, the top insert 31 and the bottom insert 41. After solidification, the fixed connection of the prefabricated wall body 1 is realized, wherein the unfolded clamping arm 64 forms a cross-shaped frame. After the slurry is fixed, the connection between the side connecting steel bars 22 and the side inserts 21 and the top insert 31 and the top connecting steel bars 32 is reinforced.

[0078] In addition, when pouring between the subsequent walls using formwork support, the concrete material can be filled in the groove 11, which not only increases the contact area between the concrete material and the prefabricated wall body 1, but also the subsequently formed solidified body is partially embedded in the groove 11, realizing a riveted structure, ensuring that the connection between the walls is more stable.

[0079] 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 characteristics of the present invention.

Claims

1. A connection structure of precast concrete walls, comprising a precast wall body (1), characterized in that: The prefabricated wall body (1) is formed with grooves (11) on both sides and the top, and each groove (11) extends along the length direction of the corresponding side of the prefabricated wall body (1); The left and right sides of the prefabricated wall body (1) are both provided with side connection components (2), and the side connection components (2) are used to connect with the floor beam and column reinforcement bundles; The bottom side of the prefabricated wall body (1) is provided with a bottom connecting member (4), and the bottom connecting member (4) is connected to the floor or the lower wall; A top connection assembly (3) is provided on the top side of the prefabricated wall body (1), and the top connection assembly (3) is connected to the upper wall or the top structure; The bottom connecting piece (4) is kept flush with the bottom side surface of the prefabricated wall body (1); When not in construction, the side connection assembly (2) and the top connection assembly (3) are both embedded and stored in the corresponding groove (11); when in construction, the side connection assembly (2) and the top connection assembly (3) can be movably extended and adjusted, and extend to the outside of the groove (11) to form a protruding connection structure; A grouting system (5) is preset in the prefabricated wall body (1), and the grouting system (5) is used to transport grouting slurry to the side connection components (2), the top connection components (3), and the bottom connection components (4); The side connection assembly (2) comprises a side insert (21) and a side connection steel bar (22); The top connection assembly (3) comprises a top insert (31) and a top connection steel bar (32); The internal holes of the side insert (21) and the top insert (31) are both stepped holes consisting of a small-diameter hole (01) and a large-diameter hole (02); The small diameter hole (01) is located at an outer position; Each of the side connecting steel bars (22) and the top connecting steel bars (32) is provided with a clamping anti-slip mechanism (6) at the insertion end, and the clamping anti-slip mechanism (6) is engaged with the step formed between the small-diameter hole (01) and the large-diameter hole (02) to prevent the side connecting steel bars (22) from slipping out of the side insert tube (21) and the top connecting steel bars (32) from slipping out of the top insert tube (31); The clamping and anti-slipping mechanism (6) comprises an end (61), a rotating shaft (62), and a plurality of clamping arms (64); The insertion ends of each of the side connecting steel bars (22) and the top connecting steel bars (32) are coaxially fixed with the end head (61), each of the end heads (61) is provided with four side grooves (611), and each of the inner walls on both sides of the side groove (611) is provided with a mounting hole (612); The rotating shaft (62) is correspondingly arranged in the side groove (611), and its two ends are correspondingly inserted into the mounting hole (612), and elastically connected to the inner wall of the mounting hole (612) via a volute spring (63); The holding arm (64) is fixed on each of the rotating shafts (62).

2. The connection structure of a precast concrete wall according to claim 1, characterized in that: Two rows of side inserts (21) are pre-buried on both sides of the prefabricated wall body (1) during prefabrication and pouring, and the end faces of the side inserts (21) are kept parallel to the inner end walls of the grooves (11) on the corresponding sides; The side inserts (21) on the same side are positioned in pairs to form an insert group A; The side connecting steel bar (22) is an M-shaped structure, and the two straight ends are respectively inserted into the two side inserts (21) in the insert group A; The side connecting steel bar (22) can be slidably adjusted along the axial direction of the side insert (21) when not being poured. When the side connecting steel bar (22) is retracted and adjusted to an extreme position, the side connecting steel bar (22) can be completely embedded and accommodated in the groove (11).

3. The connection structure of a precast concrete wall according to claim 2, characterized in that: Two rows of top inserts (31) are embedded in the top side of the prefabricated wall body (1) during prefabrication and pouring, and the end faces of the top inserts (31) are kept parallel to the inner end walls of the corresponding grooves (11); The top inserts (31) are positioned in pairs; The top connecting steel bars (32) are long and straight and are inserted into the corresponding top inserts (31) in a one-to-one correspondence; The top connecting steel bar (32) can be slidably adjusted along the axial direction of the top insert (31) when not being poured. When the top connecting steel bar (32) is retracted and adjusted to an extreme position, the top connecting steel bar (32) can be completely embedded and accommodated in the groove (11).

4. The connection structure of a precast concrete wall according to claim 3, characterized in that: The bottom connecting member (4) adopts a bottom insert (41); Two rows of bottom inserts (41) are embedded in the bottom side of the prefabricated wall body (1) during prefabrication and pouring, and the end faces of the bottom inserts (41) are kept flush with the bottom end of the prefabricated wall body (1); The bottom insert (41) is inserted and matched with the connection steel bars reserved on the floor or the top connection steel bars (32) on the top of the lower wall.

5. The connection structure of a precast concrete wall according to claim 4, characterized in that: The perfusion system (5) includes two perfusion tubes (51); The pouring system (5) is in a rectangular shape consistent with the prefabricated wall body (1), and is connected at both ends; The two pouring pipes (51) are symmetrically cast and pre-buried in the prefabricated wall body (1), and are correspondingly connected to the side inserts (21), top inserts (31) and bottom inserts (41) of the corresponding rows; The two large surfaces of the prefabricated wall body (1) are respectively evenly distributed with injection holes (12), and the two injection pipes (51) are evenly distributed with flow inlets (52); The perfusion holes (12) are in one-to-one communication with the inlet ports (52).

6. The connection structure of a precast concrete wall according to claim 5, characterized in that: When the top connecting steel bar (32) is inserted into the top insert tube (31) to the limit position, the inner end of the top connecting steel bar (32) contacts the inner wall of the pouring tube (51).

7. The connection structure of a precast concrete wall according to claim 6, characterized in that: After the side connecting steel bars (22) and the top connecting steel bars (32) pass through the step holes respectively, the vortex spring (63) elastic force pulls the clamping arm (64) to unfold and cooperate with the step to achieve clamping and blocking.

8. The connection structure of a precast concrete wall according to claim 7, characterized in that: The inner wall of each of the small-diameter holes (01) is uniformly provided with a mounting groove (71), and a ball (7) is embedded in each of the mounting grooves (71); The mounting groove (71) has an arc-shaped portion (711) adapted to the ball (7) near the inner wall of the small-diameter hole (01); A support spring (72) is fixed on the inner end wall of each mounting groove (71), and the other end of the support spring (72) contacts the ball (7); Each of the balls (7) is partially exposed in the small-diameter hole (01) and is in contact with and fits the side connecting steel bars (22) and the top connecting steel bars (32) respectively.

9. The connection structure of a precast concrete wall according to claim 8, characterized in that: The connection structure of precast concrete walls is used as follows: Insert the side connecting steel bars (22) into the two side insert tubes (21) in the insert tube group A to the limit position, so that the side connecting steel bars (22) are received in the grooves (11) on the corresponding sides, and insert the top connecting steel bars (32) into the top insert tube (31) to the limit position, so that the top connecting steel bars (32) are received in the grooves (11) on the corresponding sides; The prefabricated wall body (1) equipped with the side connecting steel bars (22) and the top connecting steel bars (32) is transported to the construction site, the side connecting steel bars (22) are slid out until the unfolded holding arms (64) collide with the steps in the side insert tube (21), and the top connecting steel bars (32) are slid out until the unfolded holding arms (64) collide with the steps in the top insert tube (31); The prefabricated wall body (1) is hoisted using a hoisting device, so that the vertical steel bars (03) in the steel bar bundle on the floor are inserted into the side connecting steel bars (22) and fixed with iron wires, wherein at least three vertical steel bars (03) are respectively located at the three corners of the M portion of the side connecting steel bars (22), and at the same time, the connecting steel bars reserved on the floor or the top connecting steel bars (32) on the top of the lower wall are aligned and inserted into the bottom insert tube (41); The slurry is poured simultaneously through each pouring hole (12), flows into the pouring pipe (51) through the inlet (52), and is finally distributed to each side insert (21), the top insert (31) and the bottom insert (41). After solidification, the fixed connection of the prefabricated wall body (1) is realized, wherein the unfolded clamping arm (64) forms a cross-shaped frame. After the slurry is fixed, the connection between the side connecting steel bars (22) and the side insert (21) and the top insert (31) and the top connecting steel bars (32) is reinforced.

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