Connecting piece for enhancing bonding performance of fabricated wall and cast-in-place structure

Abstract

The invention belongs to the field of constructional engineering, and particularly relates to a connecting piece for enhancing the bonding performance of a fabricated wall and a cast-in-place structure. Comprising a longitudinal steel plate suite, a double-end pull rod steel bar and a binding clamping piece. A first-stage cage type three-dimensional reinforcing body is formed through matrix arrangement of the longitudinal steel plate suites and crossed penetrating arrangement of the double-end pull rod steel bars, a three-dimensional net-shaped stress structure is formed between cast-in-place concrete and the prefabricated wall body, and threaded steel is arranged in a staggered layer mode at different horizontal heights, so that the space rigidity is further enhanced; and meanwhile, a secondary transverse tensile reinforcing body is formed through the synergistic effect of the lock hook piece and the double-end pull rod reinforcing steel bar, occlusion of the concrete pin key and the longitudinal sawtooth groove is formed in the horizontal direction, composite anchoring of the cast-in-place layer and the prefabricated wall is achieved, and the sliding problem of a traditional connecting piece is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the field of construction engineering, and in particular relates to a connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure. Background Art

[0002] Prefabricated buildings have been widely used in the construction industry due to their advantages such as fast construction, energy conservation and environmental protection. However, the connection performance between prefabricated walls and cast-in-place structures (such as beams, columns, and floor slabs) directly affects the seismic resistance, durability, and stability of the entire structure.

[0003] Currently, common connection methods include pre-embedded welding, bolted connections, and rebar sleeve grouting. However, these methods still have the following shortcomings in practical application: 1. Insufficient connection strength: Some connectors (such as conventional pre-embedded steel plates or rebar) have low tensile and shear bearing capacity, making them inadequate for high-rise buildings or in areas with high seismic protection requirements. They are prone to fracture or slippage under high loads. 2. Complex construction and high precision requirements: Existing connectors (such as grouting sleeves or welded joints) require stringent construction techniques, requiring accurate positioning of pre-embedded parts, dense grouting, and reliable welding quality. Failure to do so can easily lead to connection failure. Furthermore, on-site welding can be affected by environmental conditions (such as humidity and low temperatures), increasing construction complexity. 3. Poor seismic performance: Traditional rigid connectors (such as bolts or welded joints) lack sufficient deformation capacity during earthquakes, which can lead to stress concentration, causing cracking or failure at the connection, compromising the overall seismic performance of the structure.

[0004] Therefore, the present invention provides a connector that enhances the bonding performance between prefabricated walls and cast-in-place structures, which can effectively improve the bonding strength between prefabricated walls and cast-in-place structures, simplify the construction process, and at the same time have good seismic resistance and durability to meet the performance requirements of modern buildings for prefabricated structures. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a connector that enhances the bonding performance between prefabricated walls and cast-in-place structures, which is used to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: The present invention provides a connector that enhances the bonding performance between prefabricated walls and cast-in-place structures, including: a longitudinal steel plate kit, a double-head tie rod steel bar and a binding clip; the longitudinal steel plate kit is provided with four and arranged in a matrix manner inside the steel cage and inside the stirrups reserved on the prefabricated wall, and each longitudinal steel plate kit is composed of several steel sleeves plugged into each other; the outer wall of the longitudinal steel plate kit is evenly provided with several through holes penetrating in the front and rear directions from top to bottom, and a T-shaped slide groove arranged along the length direction; the four longitudinal steel plate kits are divided into two groups, the front and rear longitudinal steel plate kits in each group have opposite through holes in the through holes. Threaded steel bars are passed through together, and the two ends of the double-headed tie rod steel bars are respectively sleeved in the threaded steel bars passed through the corresponding two groups of longitudinal steel plate kits; several groups of binding clips are slidingly set inside the slide groove to clamp the stirrups of the steel cage and the stirrups on the prefabricated wall; several evenly arranged locking hooks are threadedly connected at the position close to one side of the prefabricated wall, and the other end of the locking hooks is hooked on the stirrups of the steel cage at adjacent positions and the stirrups reserved on the prefabricated wall; multiple groups of longitudinal steel plate kits, binding clips, double-headed tie rod steel bars and threaded steel bars cooperate to form a first-level cage-type three-dimensional cast reinforcement body; several of the locking hooks and the double-headed tie rod steel bars and threaded steel bars adjacent to their upper sides together form a second-level transverse tensile cast reinforcement body.

[0007] According to an advantageous embodiment, a serrated groove is provided at one end of the steel sleeve of the longitudinal steel plate assembly away from the slide groove for strengthening the bonding surface formed with the concrete during pouring.

[0008] According to an advantageous embodiment, the locking hook member is a plate-type structure, and a rectangular groove for concrete pouring is further provided on the plate body of the locking hook member.

[0009] According to an advantageous embodiment, the restraint card is a horizontal U-shaped structure, with horizontal through holes on the upper and lower sides of the U-shaped groove, and vertical through holes on the outside of the U-shaped groove.

[0010] According to an advantageous embodiment, the outer wall of the restraining clamp is provided with a friction plate which fits in the sliding groove and performs a friction effect.

[0011] According to an advantageous embodiment, the number of double-headed tie rods passing through each of the threaded steel bars is not less than two.

[0012] According to an advantageous embodiment, the threaded steel bars passing through the left and right sets of longitudinal steel plate sets are not at the same level.

[0013] According to an advantageous embodiment, the left and right groups of opposing restraining clips are locked by a U-shaped piece.

[0014] Compared with the prior art, the embodiment of the present invention provides a connector for enhancing the bonding performance between prefabricated walls and cast-in-place structures, which has the following beneficial effects: 1. The present invention forms a first-level cage-type three-dimensional reinforcement body through the matrix arrangement of longitudinal steel plate kits and the cross-penetration of double-headed tie rods and steel bars, so that a three-dimensional mesh force structure is formed between the cast-in-place concrete and the prefabricated wall, and the threaded steel bars are arranged in staggered layers at different horizontal heights to further enhance the spatial rigidity; at the same time, a second-level transverse tensile reinforcement body is formed through the synergistic action of the locking hook and the double-headed tie rod and steel bars, and a concrete pin key and a longitudinal serrated groove are engaged in the horizontal direction to achieve composite anchoring of the cast-in-place layer and the prefabricated wall, effectively solving the slippage problem of traditional connectors.

[0015] 2. The longitudinal steel plate assembly of this invention utilizes a pluggable steel sleeve structure, allowing for segmented installation within the reinforcement cage, resolving the difficulty of positioning integral embedded components. The restraining clips adaptively adjust their position via a sliding groove, significantly improving construction efficiency compared to traditional welding. Furthermore, the double-ended tie rods and threaded steel utilize a clearance fit, simplifying installation alignment while allowing for deformation margins for earthquake resistance. The U-shaped components also feature a bidirectional locking design, allowing for flexible installation direction based on site space, adapting to complex construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram after part of the steel cage structure is cut away.

[0018] Figure 3 It is the front view of the present invention.

[0019] Figure 4 It is a top view of the present invention.

[0020] Figure 5 It is a cross-sectional view of the internal structure between the longitudinal steel plate kit and the restraining clip of the present invention.

[0021] The reference numerals in the figure are: 1. longitudinal steel plate kit; 11. through hole; 12. slide groove; 13. serrated groove; 2. double-headed tie rod steel bar; 3. restraining clip; 31. through hole; 4. U-shaped part; 5. threaded steel bar; 6. lock hook part; 61. rectangular groove. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 -Attached Figure 5 This application is described in further detail.

[0023] Please refer to Figure 1 and Figure 2A connector for enhancing the bonding performance between prefabricated walls and cast-in-place structures, comprising: a longitudinal steel plate kit 1, a double-headed tie rod steel bar 2 and a restraining clip 3.

[0024] There are four longitudinal steel plate kits 1, and the four longitudinal steel plate kits 1 are arranged in a matrix arrangement inside the steel cage and the stirrups reserved on the assembled wall. Each of the longitudinal steel plate kits 1 is composed of several steel sleeves plugged into each other. It should be noted that the purpose of setting the longitudinal steel plate kit 1 as a structure composed of several steel sleeves plugged into each other is to facilitate its placement inside the steel cage or the stirrups reserved on the assembled wall. Normally, the length of the longitudinal steel plate kit 1 is consistent with the length of the steel cage. If the longitudinal steel plate kit 1 is a single, non-detachable structure, it will be difficult to place it inside the steel cage or the stirrups reserved on the assembled wall. At the same time, In order to ensure the structural strength of the longitudinal steel plate kit 1, it is necessary to open a groove with a depth greater than ten centimeters at the upper end of the steel sleeve and set a protruding structure with the same depth as the groove at the lower end, and the outer size of the protruding structure is consistent with the inner diameter of the groove to ensure the fit between the two. After subsequent docking, it can be ensured that the longitudinal steel plate kit 1 will not loosen, and the structural strength of the formed wall after pouring concrete is guaranteed; specifically, when assembling the steel sleeve, it is necessary to cut off the protruding structure at the lower end of the lowest steel sleeve; the purpose is to maintain the overall structural strength of the longitudinal steel plate kit 1; to avoid the difference between the protruding structure at the lower end and the outer diameter of the steel sleeve being too large, resulting in insufficient structural strength of the poured concrete wall.

[0025] The outer wall of the longitudinal steel plate assembly 1 is evenly provided with a plurality of through holes 11 penetrating along the front-to-back direction from top to bottom, and the longitudinal steel plate assembly 1 is also penetrated by a sliding groove 12 with a T-shaped cross section along its length direction.

[0026] The four longitudinal steel plate kits 1 are divided into two groups, left and right. The two opposite through holes 11 on the front and rear longitudinal steel plate kits 1 in each group are penetrated by threaded steel bars 5. The inner diameter of the through hole 11 is the same as the outer diameter of the threaded steel bars 5. The two ends of the double-headed tie rod steel bars 2 are respectively sleeved in the threaded steel bars 5 penetrated on the corresponding two groups of longitudinal steel plate kits 1. When installing the double-headed tie rod steel bars 2, in order to improve the seismic resistance level as much as possible, multiple tests can be carried out to reasonably derive the penetration relationship between the double-headed tie rod steel bars 2 and the threaded steel bars 5. If the seismic resistance requirement is high, the end penetration hole of the double-headed tie rod steel bars 2 can be set to be slightly larger than the outer diameter of the threaded steel bars 5. During installation, the fitting relationship between the two is a clearance fit. Therefore, when an earthquake occurs after the concrete is poured and formed later, the internal double-headed tie rod steel bars 2 and the threaded steel bars 5 are flexibly connected, which can effectively improve the seismic resistance level. The clearance fit also facilitates the penetration and installation of the threaded steel bars 5.

[0027] See Figure 4 and Figure 5The inside of the slide groove 12 is also slidably provided with several groups of binding clips 3 for clamping the stirrups of the steel cage and the stirrups reserved on the assembled wall; the left and right groups of relative binding clips 3 are locked by the U-shaped parts 4; the outer wall of the binding clip 3 is provided with a friction plate that fits with the slide groove 12 and has a friction effect; in the actual installation process, it is necessary to reasonably move the binding clip 3 according to the position of the stirrup to keep it aligned with the position of the stirrup, so as to facilitate the later insertion into the outside of the stirrup; and the purpose of providing the friction plate is to enable the binding clip 3 to be positioned at any position on the slide groove 12; when the stirrups are clamped by the binding clip 3, in order to fix the two adjacent stirrups on the left and right, the stability and connection strength of the later cast-in-place structure are improved; the two adjacent binding clips 3 can be further locked by the U-shaped part 4, so as to avoid the movement or deflection of the steel cage during the pouring of concrete.

[0028] See Figure 5 The restraining card 3 is a horizontal U-shaped structure, and a horizontal through hole 31 is opened on the upper and lower sides of the U-shaped groove of the restraining card 3, and a vertical through hole 31 is also opened on the outside of the U-shaped groove.

[0029] Specifically, when the two adjacent binding clamps 3 are locked by the U-shaped member 4, the locking method of the U-shaped member 4 can be reasonably selected according to the installation space. Figure 4 In this embodiment, the U-shaped piece 4 is selected to penetrate the horizontal through-holes 31 on the two adjacent binding clamps 3 horizontally and cooperate with nuts to lock them. Specifically, the U-shaped piece 4 can also be used to penetrate the through-holes 31 in the vertical direction to fix the two binding clamps 3. It should be noted that when the through-holes 31 without the U-shaped piece 4 are poured with concrete in the later stage, the concrete will penetrate into the through-holes 31, further improving the connection strength between the concrete and the U-shaped piece 4; and the through-holes 31 arranged in both the vertical and horizontal directions can be reasonably selected according to the installation space during actual installation, which greatly improves the efficiency of locking the two adjacent binding clamps 3.

[0030] See Figure 2 , a number of evenly arranged locking hooks 6 are also threadedly connected to the position close to one side of the assembled wall, and the other end of the locking hook 6 is hooked on the stirrups of the steel cage at the adjacent position and the stirrups reserved on the assembled wall.

[0031] The provided locking hook 6 laterally connects the adjacent steel cages and prefabricated walls, forming a laterally stable supporting structure after pouring concrete, thereby improving the structural strength of the formed wall; at the same time, the locking hook 6 is set as a plate structure, and a rectangular groove 61 for concrete pouring is also provided on the plate body of the locking hook 6; further, an embedded reinforcement structure is formed between the poured concrete and the rectangular groove 61, fully improving the connection stability between the cast-in-place concrete wall and the prefabricated wall.

[0032] Multiple sets of longitudinal steel plate kits 1, binding clips 3, double-headed tie rod steel bars 2 and threaded steel bars 5 work together to form a first-level cage-type three-dimensional casting reinforcement body that improves the bonding strength between the prefabricated wall and the cast-in-place structure; several of the locking hooks 6 and the double-headed tie rod steel bars 2 and threaded steel bars 5 adjacent to their upper sides together form a second-level transverse tensile casting reinforcement body that improves the bonding strength between the prefabricated wall and the cast-in-place structure; the two-level reinforcement body fully improves the connection strength between the cast-in-place structure and the prefabricated prefabricated wall panel.

[0033] See Figure 3 The end of the steel sleeve of the longitudinal steel plate kit 1 away from the slide groove 12 is provided with a serrated groove 13 for strengthening the bonding surface formed with the concrete during pouring; it should be noted that the angle of the serrated groove 13 is between thirty degrees and forty-five degrees. The purpose is to provide a greater degree of longitudinal tension after the concrete is poured and formed in the later stage, so as to avoid longitudinal displacement between the cast concrete wall and the prefabricated assembly wall.

[0034] Specifically, when selecting the number of double-headed tie rod steel bars 2, the number of double-headed tie rod steel bars 2 passed through each threaded steel bar 5 should be no less than two; and the number of double-headed tie rod steel bars 2 being no less than two can divide the poured concrete into transverse multi-layer intervals when pouring concrete, thereby improving the connection strength between the cast-in-place wall and the prefabricated wall in the single-layer interval.

[0035] See Figure 3 The threaded steel bars 5 passed through the left and right sets of longitudinal steel plate kits 1 are not at the same horizontal height; a three-dimensional frame structure is formed between the threaded steel bars 5 of different heights and the longitudinal steel plate kits 1, and the threaded steel bars 5 form an irregular reinforcement body inside the three-dimensional frame structure, which effectively improves the structural strength of the cast-in-place structure after forming in the later stage.

[0036] Specifically, when this connector is used to enhance the connection strength between the cast-in-place structure and the prefabricated wall, first fix the prefabricated wall between the structural columns (beams, floor slabs, etc.), and then place the pre-woven or welded steel cage at the position where the concrete needs to be poured between the structural columns and the prefabricated wall panels. Then, the longitudinal steel plate kit 1 is placed inside the steel cage and inside the stirrups of the prefabricated wall in turn, and then the binding clips 3 corresponding to the number of stirrups are placed along the inside of the slide 12. The stirrups on the steel cage and the stirrups on the prefabricated wall are clamped by the binding clips 3 on both sides, and then the two adjacent binding clips 3 are locked by the U-shaped parts 4. After completing the above operations, the clamped stirrups are connected to the prefabricated wall through the locking hook 6 to further improve the strength of the concrete after the later pouring. Finally, a suitable number of threaded steel bars 5 are inserted along the through hole 11 and the threaded steel bars 5 are inserted during the insertion. In the process, the double-head tie rod steel bar 2 is fixed to form a steel reinforcement body; it should be noted that the provided connecting piece can fix the steel cage and the assembled wall, and can also fix the steel cage and the steel cage. The specific needs need to be reasonably adjusted in combination with the space size of the cast-in-situ structure. When installing this connecting piece, only ordinary plug-in and clamping or bolt connection is required. There is no need to weld or tie steel wire inside the narrow steel cage for fixing. The specific operation is relatively simple. At the same time, this connecting piece can stably connect the steel cage and the assembled wall to avoid position movement between the steel cage and the wall during the pouring of concrete or the vibration of the poured concrete. At the same time, a multi-stage reinforcement body of the cast-in-situ structure can be formed, which greatly enhances the connection strength between the cast-in-situ structure and the assembled wall. At the same time, the flexible displacement of the multi-stage reinforcement body is also used for shock absorption in the later seismic resistance and shock absorption process.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 should not be understood as limiting the present invention.

[0038] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure, characterized in that: include: Longitudinal steel plate kit, double-ended tie rod reinforcement and tie clamps; There are four longitudinal steel plate sets arranged in a matrix manner and placed inside the steel cage and the stirrups reserved on the prefabricated wall. Each longitudinal steel plate set is composed of several steel sleeves plugged into each other. The outer wall of the longitudinal steel plate set is evenly provided with a plurality of through holes penetrating in the front-to-back direction from top to bottom, and a T-shaped sliding groove is provided along the length direction; The four longitudinal steel plate sets are divided into two groups, the front and rear longitudinal steel plate sets in each group have threaded steel bars inserted into the opposite through holes, and the two ends of the double-headed tie rod steel bars are respectively inserted into the threaded steel bars inserted into the corresponding two groups of longitudinal steel plate sets; The internal sliding of the chute is provided with a plurality of sets of binding clips for clamping the stirrups of the steel cage and the stirrups on the assembled wall; A plurality of evenly arranged locking hooks are threadedly connected to one side of the assembled wall, and the other ends of the locking hooks are hooked on the stirrups of the adjacent steel cage and the stirrups reserved on the assembled wall; Multiple sets of longitudinal steel plate kits, binding clips, double-headed tie rods and threaded steel bars work together to form a first-level cage-type three-dimensional cast reinforcement body; several of the locking hooks and the double-headed tie rods and threaded steel bars adjacent to their upper sides together form a second-level transverse tensile cast reinforcement body.

2. A connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: A serrated groove is provided on one end of the steel sleeve of the longitudinal steel plate set away from the slide groove for strengthening the bonding surface formed with the concrete during pouring.

3. A connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: The locking hook member is a plate structure, and a rectangular groove for concrete pouring is provided on the plate body of the locking hook member.

4. A connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: The restraining card is a horizontal U-shaped structure, with horizontal through holes on the upper and lower sides of the U-shaped groove, and a vertical through hole on the outside of the U-shaped groove.

5. The connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: The outer wall of the restraining clamp is provided with a friction plate which fits the sliding groove and has a friction effect.

6. The connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: The number of double-headed tie rods passing through each of the threaded steel bars is not less than two.

7. The connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 1, characterized in that: The threaded steel bars passing through the left and right sets of longitudinal steel plate assemblies are not at the same level.

8. The connector for enhancing the bonding performance between an assembled wall and a cast-in-place structure according to claim 4, characterized in that: The left and right sets of opposite binding clamps are locked by a U-shaped piece.

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