Laminated slab post-cast strip slurry leakage prevention structure

Abstract

The utility model belongs to the technical field of buildings. Aiming at the problem of poor use effect of the existing laminated slab post-cast strip slurry leakage prevention device, the utility model provides a laminated slab post-cast strip slurry leakage prevention structure which comprises a double-T-shaped extrusion part, a locker and a leakage prevention frame positioned between the double-T-shaped extrusion part and the locker. The leak-proof frame and the locking devices are arranged in a matched mode, so that the fastening degrees of the locking devices can be kept consistent, deformation and edge warping caused by uneven stress on the surface of the supporting plate due to the fact that the locking degrees of one or more locking devices are too tight or too loose are prevented, slurry leakage is prevented, and the subsequent concrete pouring effect is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of building technology, specifically relating to a grout-proof structure for post-pouring strips of composite slabs. Background Technology

[0002] Composite floor slabs are assembled monolithic floor slabs made by stacking precast slabs and cast-in-place reinforced concrete layers. Composite floor slabs have good integrity, and the upper and lower surfaces of the slab are flat, facilitating the finishing layer decoration. They are suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity. A post-pouring strip refers to a gap of a certain height left between the upper and lower ends of the composite slab after installation, within which concrete is poured again.

[0003] Currently, grout leakage at the joints of the post-cast strips in prefabricated composite floor slabs is quite common. This mainly occurs during concrete pouring, where the pressure of the concrete can cause the lower edge of the composite slab strip to warp, leading to grout leakage, misalignment, and other quality issues. Additionally, due to the large size of individual composite slabs, the splicing between the slab and the formwork may not be tight enough, easily causing grout leakage through the joint gaps. Grout leakage not only affects the aesthetics of prefabricated buildings but also impacts later finishing processes and increases construction costs.

[0004] Patent CN221760979U discloses a grout leakage prevention device for post-cast strips in precast composite slabs, including a precast slab, a support assembly, and a clamping assembly. The support assembly includes a support plate that abuts against the lower wall of the precast slab. The clamping assembly includes a clamping rod and multiple fasteners. The two ends of the clamping rod are clamped to the ends of two adjacent precast slabs, and the fasteners pass through the clamping rod and are fixedly connected to the support plate. In use, the fixed connection between the support plate and the clamping rod achieves a tight fit between the support plate and the precast slab. Finally, concrete is poured into the precast slab and the post-cast strip, completely covering the reinforcing mesh, and the post-cast strip is tightly filled with concrete.

[0005] The above technical solution cannot ensure that the tightening degree of each fastening nut is consistent when tightening and fixing each fastening nut. If one fastening nut is not tightened and becomes loose, it will affect the fit between the support plate and the precast slab at that point, causing uneven stress on the surface of the support plate, deformation and warping, affecting the concrete pouring effect and resulting in poor performance. Summary of the Invention

[0006] The purpose of this invention is to overcome the problem of poor performance of existing anti-leakage devices for post-pouring strips in composite slabs.

[0007] To achieve the above objectives, the technical approach adopted by this utility model is as follows: A grout leakage prevention structure for the post-pouring strip of the composite slab is provided, including a double-T-shaped extruder, a locking device, and a leak-proof frame located between the double-T-shaped extruder and the locking device. Through the coordinated arrangement of the leak-proof frame and the locking device, this utility model ensures that the tightness of each locking device remains consistent, preventing uneven stress on the support plate surface and deformation / warping caused by one or more locking devices being too tight or too loose, thereby preventing grout leakage and ensuring the subsequent concrete pouring effect.

[0008] Based on the above technical concept, the technical solution adopted by this utility model is as follows:

[0009] A grout leakage prevention structure for post-cast strips of composite slabs includes a support plate and further includes:

[0010] Multiple double-T-shaped extrusions include two threaded rods arranged perpendicularly to the support plate, with the movable end of each threaded rod passing through the support plate and located below the support plate;

[0011] A leak-proof frame is located below the support plate and is fitted with each double T-shaped extrusion piece;

[0012] Multiple locking devices are located below the leak-proof frame, and each locking device is connected to a corresponding threaded rod.

[0013] To increase the stress-bearing area of ​​the support plate, making the overall stress on the support plate more uniform and preventing deformation and warping of the support plate, a further refinement of the above technical solution is made: Preferably, the leak-proof frame includes:

[0014] Multiple U-shaped support units, each U-shaped support unit being sleeved with a corresponding double T-shaped extrusion piece;

[0015] The connecting rod is connected to multiple U-shaped support units.

[0016] To better secure the leak-proof frame, the above technical solution is further defined by the following: Each locking device includes:

[0017] The arc-shaped clamp engages with the corresponding threaded rod and contacts the bottom surface of the corresponding U-shaped support unit;

[0018] The fixing nut is sleeved with the corresponding threaded rod and connected to the bottom surface of the arc-shaped clamp.

[0019] To facilitate the removal of the double-T-shaped extrusion piece after the concrete has solidified, the above technical solution is further refined by installing a telescopic cylinder on each threaded rod, with the upper end of each telescopic cylinder connected to the double-T-shaped extrusion piece and the lower end in contact with the upper surface of the arc-shaped clamp.

[0020] Beneficial effects:

[0021] I. This utility model, through the combined design of double T-shaped extrusion parts, support plate, leak-proof frame and locking device, can tightly press the support plate onto the bottom surface of the composite plate, preventing uneven force on the surface of the support plate caused by one or more locking devices being too tight or too loose, thus preventing deformation and warping of the support plate and improving the concrete pouring effect.

[0022] Second, through the combined design of the U-shaped support unit and the locking device, the arc-shaped clamp can not only fix and limit the U-shaped support unit, but also lock and fix the threaded rod of the double T-shaped extrusion piece, preventing the threaded rod of the double T-shaped extrusion piece from tilting and moving under the pressure of the concrete during the concrete pouring process, and preventing the support plate from deforming and warping.

[0023] Third, this utility model, through the combined design of the telescopic cylinder and the threaded rod, allows the overall length of the telescopic cylinder to be adjusted according to actual usage needs, so as to be suitable for composite plates of different thicknesses while facilitating the disengagement of the threaded rod. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of a post-pouring strip anti-leakage structure for composite slabs proposed in this utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the device from another perspective;

[0027] Figure 3 for Figure 1 A schematic diagram of the device from another perspective;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 This is a schematic diagram showing the positional relationship between the double-T-shaped extrusion and the support plate;

[0030] Figure 6 for Figure 5 A bottom view of the device shown;

[0031] Figure 7 for Figure 5 Cross-sectional view of the device shown;

[0032] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0033] Among them, 1. Double T-shaped extrusion part; 11. Threaded rod; 12. Crossbar; 2. Leak-proof frame; 21. U-shaped support unit; 22. Connecting rod; 3. Locking device; 31. Arc-shaped clamp; 32. Fixing nut; 4. Support plate; 5. Telescopic cylinder; 6. Composite plate. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "length direction", "up", "down", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] The terms "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0039] The inventors discovered that current anti-leakage devices for post-cast strips of composite slabs cannot ensure that the tightening degree of each fastening nut is consistent when tightening and fixing them. If one fastening nut is not tightened and becomes loose, it will affect the adhesion between the support plate and the precast slab at that point, resulting in uneven stress on the surface of the support plate, affecting the concrete pouring effect and leading to poor performance.

[0040] Based on the above findings, this application proposes a grout leakage prevention structure for the post-cast strip of composite slabs. This structure includes multiple double-T-shaped extrusion parts 1, a leakage prevention frame 2, multiple locking devices 3, a support plate 4, and a telescopic cylinder 5. The following design enhances the overall grout leakage prevention effect of the device:

[0041] 1. The anti-leakage frame 2 can increase the stress area of ​​the support plate, making the stress area of ​​the support plate more uniform, thereby preventing the support plate from deforming and warping under the action of the concrete gravity during the subsequent concrete pouring process, thus avoiding concrete leakage and improving the concrete pouring effect.

[0042] 2. The locking device 3 is engaged with the U-shaped support unit 21 in the leak-proof frame 2, which can limit and fix the U-shaped support unit 21 while preventing the threaded rod 11 in the double T-shaped extrusion piece 1 from tilting and moving under the pressure of concrete, thereby further improving the concrete pouring effect.

[0043] 3. The combined design of the telescopic cylinder 5 and the double T-shaped extrusion piece 1 makes the anti-leakage structure of the post-pouring strip of the composite slab provided by this utility model applicable to composite slabs 6 of different thicknesses. After the concrete solidifies, the double T-shaped extrusion piece 1 can be easily removed from the concrete for reuse. Example 1

[0044] like Figures 1 to 8 As shown, this utility model provides a grout leakage prevention structure for post-pouring strips of composite slabs, including multiple double-T-shaped extrusion parts 1, a leakage prevention frame 2, multiple locking devices 3, a support plate 4, and a telescopic cylinder 5.

[0045] It should be noted that the present invention does not limit the number of double T-shaped extrusion pieces 1 in the anti-leakage structure of the post-pouring strip of the composite slab. The present invention is illustrated by taking four double T-shaped extrusion pieces 1 as an example.

[0046] In this embodiment, the double T-shaped extrusion member 1 includes two parallel threaded rods 11 and a crossbar 12 connected to the two threaded rods 11; wherein, one end of each threaded rod 11 is fixedly connected to the crossbar 12, and the other end passes through the support plate 4 and is connected to the locking device 3.

[0047] In this embodiment, the leak-proof frame 2 is disposed below the support plate 4. The leak-proof frame 2 includes multiple U-shaped support units 21 and a connecting rod 22 fixedly connected to each U-shaped support unit 21. The multiple U-shaped support units 21 are arranged in parallel to each other, and each U-shaped support unit 21 is sleeved with the corresponding double T-shaped extrusion piece 1.

[0048] The U-shaped support unit 21 is a U-shaped rod structure, and the connecting rod 22 is a straight rod structure. Specifically, both the U-shaped support unit 21 and the connecting rod 22 are made of steel bars.

[0049] The locking device 3 includes an arc-shaped locking member 31 and a fixing nut 32 fixedly connected to the arc-shaped locking member 31;

[0050] Specifically, the arc-shaped clamp 31 has an arc-shaped structure, and a square mounting platform is integrally connected to the center of the arc-shaped structure. The upper surface of the square mounting platform is used to contact the bottom surface of the telescopic cylinder 5 sleeved on the threaded rod 11, and the lower surface is used to be fixedly connected to the fixing nut 32. The square platform of the arc-shaped clamp 31 has a through hole at the center to facilitate the threaded rod 11 to pass through.

[0051] It should be noted that this utility model embodiment does not limit the fixed connection method of the crossbar 12 and threaded rod 11 in the double T-shaped extrusion part 1, the fixed connection method of the U-shaped support unit 21 and the connecting rod 22, and the fixed connection method of the arc-shaped clamp 31 and the fixing nut 32. For example, the fixed connection method is welding.

[0052] When using the anti-leakage structure for the post-pouring strip of the composite slab provided by this utility model, firstly, the double T-shaped extruder 1 is placed above the post-pouring strip of the composite slab, then the support plate 4 is placed below the post-pouring strip of the composite slab, and then the anti-leakage frame 2 is placed below the support plate 4. Then, the locking device 3 is connected to the threaded rod 11. The locking device 3 provides an upward supporting force to the support plate 4, so that the support plate 4 is in close contact with the bottom surface of the composite slab 6, preventing concrete leakage. Due to the setting of the U-shaped support unit 21, the surface of the support plate 4 can be more evenly stressed, preventing uneven stress on the surface of the support plate caused by one or more locking devices being too tight or too loose, and preventing deformation and warping of the support plate, thereby improving the concrete pouring effect.

[0053] To facilitate the removal of the double T-shaped extrusion piece 1 after the concrete has hardened, a telescopic cylinder 5 is fitted onto each threaded rod 11. Specifically, the upper end of the telescopic cylinder 5 is fixedly connected to the crossbar 12, and the lower end abuts against the upper surface of the square mounting platform at the center of the arc-shaped clamp 31. As the locking device 3 rotates upward to tightly press the support plate 6 onto the bottom surface of the composite plate 6, the overall length of the telescopic rod 5 shortens as the locking device 3 moves, making it suitable for composite plates 6 of different thicknesses. The upper end of the telescopic cylinder 5 is fixedly connected to the crossbar 12 by welding.

[0054] Implementation Cases

[0055] Step 1: Secure the support plate 4 using the existing formwork lifting device;

[0056] Step 2: Place each double T-shaped extrusion 1 at the post-cast strip of the composite plate, and make the threaded rod 11 of each double T-shaped extrusion 1 pass through the support plate 4, so that the free end of the threaded rod 11 is located below the support plate 4.

[0057] Step 3: Place the leak-proof frame 2 under the support plate 4, and make each U-shaped support unit 21 fit into the corresponding double T-shaped extrusion piece 1;

[0058] Step 4: The leak-proof frame 2 is fixed to each threaded rod 11 by the locking device 3; at the same time, the telescopic rod 5 shortens in length as the locking device 3 moves.

[0059] Step 5: Pouring concrete for the post-cast strip of the composite slab.

[0060] After the concrete has hardened, remove the locking device 3, then remove the leak-proof frame 2, and finally remove each double T-shaped extrusion piece 1 for subsequent reuse.

[0061] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A leakproof structure of post-cast strip of a laminated slab, comprising a support plate (4), characterized in that, Also includes: Multiple double T-shaped extrusion parts (1) include two threaded rods (11) arranged perpendicularly to the support plate (4), with the movable end of each threaded rod (11) passing through the support plate (4) and located below the support plate (4); A leak-proof frame (2) is set below the support plate (4) and is sleeved with each double T-shaped extrusion (1); Multiple locking devices (3) are located below the leak-proof frame (2), and each locking device (3) is connected to a corresponding threaded rod (11).

2. The leak-proof structure of post-cast strip of the composite slab according to claim 1, characterized in that, The leak-proof frame (2) includes: Multiple U-shaped support units (21), each U-shaped support unit (21) is sleeved with a corresponding double T-shaped extrusion (1); The joint rod (22) is connected to multiple U-shaped support units (21).

3. The leak-proof structure of post-cast strip of a composite slab according to claim 2, characterized in that, Each locking device (3) includes: The arc-shaped clip (31) is sleeved with the corresponding threaded rod (11) and contacts the bottom surface of the corresponding U-shaped support unit (21); The fixing nut (32) is sleeved with the corresponding threaded rod (11) and connected to the bottom surface of the arc-shaped clamp (31).

4. The leak-proof structure of post-cast strip of the composite slab according to claim 3, characterized in that, Each threaded rod (11) is fitted with a telescopic cylinder (5), and the upper end of each telescopic cylinder (5) is connected to the double T-shaped extrusion piece (1), and the lower end is in contact with the upper surface of the arc-shaped clamp (31).

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