Positioning anti-floating device for hollow slab

Abstract

The utility model provides a positioning anti-floating device for a hollow slab, and belongs to the technical field of constructional engineering. The problems that in a traditional hollow box fixing technology, operation is tedious, cost is high, efficiency is low, and construction safety risks exist are solved. The anti-floating device comprises an anti-floating support, a positioning longitudinal pipe, a first connecting joint, positioning transverse pipes, a second connecting joint and a positioning supporting pipe, the lower end of the positioning longitudinal pipe is connected with the anti-floating support, the upper end of the positioning longitudinal pipe is connected with the first connecting joint, and the positioning transverse pipes are in threaded connection with the two sides of the first connecting joint; the end of the positioning transverse pipe is connected with a second connector, positioning supporting pipes are connected to the two sides of the second connector in a screwed mode, the positioning transverse pipe is perpendicular to the positioning longitudinal pipe, the positioning supporting pipes are perpendicular to the positioning transverse pipe, the anti-floating support is connected with the hollow plate, and the positioning supporting pipes on the two sides of the second connector make contact with the adjacent hollow boxes respectively. The device is mainly used for positioning and anti-floating of hollow slabs.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and in particular relates to a positioning and anti-buoyancy device for hollow slabs. Background Technology

[0002] In modern architecture, especially in large-span floor slab structures, hollow slab designs with built-in lightweight infill are often used to effectively reduce structural weight, optimize load-bearing performance, and save building materials. These hollow slabs typically consist of a frame composed of upper and lower layers of steel mesh, a hidden beam in the middle, and steel mesh between ribs, with hollow boxes arranged regularly within it, leaving gaps between the boxes for concrete pouring. This design significantly reduces the floor slab's self-weight and improves structural efficiency.

[0003] However, during the construction of such hollow core slabs, the density of the box material is much lower than that of concrete. Therefore, the boxes are highly susceptible to floating and displacement due to the fluidity of the concrete and the effects of vibration during pouring. Once the boxes float, it not only disrupts their intended precise positioning, leading to uneven spacing and gaps, but also severely weakens the thickness of the upper concrete cover. Insufficient cover directly affects the load-bearing capacity, fire resistance, and durability of the floor slab, posing significant quality and safety hazards. Therefore, reliable positioning and anti-buoyancy fixation of the hollow core boxes during the construction phase is crucial to ensuring the realization of the hollow core slab structural design intent.

[0004] The commonly used method for fixing hollow box slabs in the industry typically requires workers to work simultaneously above and below the floor slab formwork. The process is roughly as follows: workers above lay anti-buoyancy reinforcement bars on the top surface of the box, while workers below drill holes at corresponding positions on the bottom of the formwork, insert anti-buoyancy tie bars, anchor the upper ends of the tie bars to the anti-buoyancy reinforcement bars, and fix the lower ends to the formwork support system. This method has significant drawbacks: First, it relies heavily on close coordination between workers above and below the floor slab, requiring multiple workers to operate simultaneously, resulting in high communication and coordination costs. Furthermore, workers below are inconveniently drilling, inserting, and fixing the bars in a confined space, posing safety hazards. Second, each hollow box typically requires an independent anti-buoyancy tie bar fixing point, leading to a large number of fixing points, high material consumption, and low installation efficiency. Third, the entire installation process is cumbersome and complex, demanding a high level of worker skill; even slight errors can result in inaccurate box positioning or insecure fixing, affecting the final pouring quality. Therefore, there is an urgent need for a hollow box positioning and anti-buoyancy fixing solution that can overcome the above defects, is simpler and more efficient to operate, is safe and reliable, and is more cost-effective. Utility Model Content

[0005] In view of this, the present invention aims to propose a positioning and anti-buoyancy device for hollow slabs to solve the problems of cumbersome operation, high cost, low efficiency and construction safety risks in the traditional hollow box fixing process.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a positioning and anti-buoyancy device for a hollow slab, wherein the hollow slab is a floor slab, and a plurality of hollow boxes are arranged in an array within the hollow slab, with the hollow boxes spaced apart. The positioning and anti-buoyancy device is arranged between adjacent hollow boxes. The anti-buoyancy device includes an anti-buoyancy support, a positioning longitudinal tube, a first connecting joint, a positioning transverse tube, a second connecting joint, and a positioning support tube. The lower end of the positioning longitudinal tube is connected to the anti-buoyancy support, and the upper end of the positioning longitudinal tube is connected to the first connecting joint. Positioning transverse tubes are screwed to both sides of the first connecting joint, and the end of the positioning transverse tube is connected to the second connecting joint. Positioning support tubes are screwed to both sides of the second connecting joint. The positioning transverse tube is perpendicular to the positioning longitudinal tube, and the positioning support tube is perpendicular to the positioning transverse tube. The anti-buoyancy support is connected to the hollow slab, and the positioning support tubes on both sides of the second connecting joint are in contact with adjacent hollow boxes. A No. 12 line is connected to the anti-buoyancy support, and the No. 12 line is used to bind all hollow boxes along the transverse and longitudinal directions.

[0007] Furthermore, the anti-buoyancy support has a Z-shaped structure.

[0008] Furthermore, the anti-buoyancy support is made of galvanized flat steel.

[0009] Furthermore, the anti-buoyancy bracket has symmetrical slots, and the No. 12 line is fixed in the slots.

[0010] Furthermore, the positioning longitudinal tube is connected to the first connecting joint, and the positioning transverse tube is connected to the second connecting joint via a snap-fit ​​assembly.

[0011] Furthermore, the buckle assembly includes a buckle member and a cable tie. The buckle member has a cable tie slot, and the side of the positioning longitudinal tube or positioning transverse tube has a through hole. The buckle member is connected to the positioning longitudinal tube or positioning transverse tube, and the cable tie passes through the cable tie slot and the through hole to tighten the first connecting joint or the second connecting joint.

[0012] Furthermore, the anti-buoyancy support is connected to the hollow plate using aircraft expansion tubes and color zinc self-tapping screws.

[0013] Furthermore, the lower end of the positioning longitudinal tube is connected to the anti-buoyancy bracket through the cooperation of a limiting screw and a limiting nut.

[0014] Furthermore, the positioning longitudinal tube, the first connecting joint, the positioning transverse tube, the second connecting joint, the positioning support tube, and the buckle assembly are all made of PVC material.

[0015] Furthermore, the hollow thickness is 300mm, the dimensions of the hollow box are 600*600*180mm, and the distance between adjacent hollow boxes is 100mm.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the hollow slab positioning and anti-buoyancy device provided by this utility model effectively solves the problems of cumbersome operation, high cost, low efficiency and construction safety risks in the traditional hollow box fixing process.

[0017] This invention enables single-layer operation, significantly improving construction safety and efficiency. It employs an anti-buoyancy support and positioning pipe design, allowing all installation operations to be completed independently on the working surface above the floor slab formwork. This design completely eliminates the need for workers below to drill holes and thread reinforcement bars in confined spaces, fundamentally eliminating the safety risks of working at heights. Construction personnel no longer need to coordinate with workers above or below; a single person can complete the installation of the box-type positioning and anti-buoyancy system, simplifying process connections and significantly reducing manpower requirements and communication costs.

[0018] This invention optimizes the layout of fixing points, reducing material and labor consumption. The anti-buoyancy support adopts a Z-shaped galvanized flat steel structure, and its symmetrical slot design allows one support to simultaneously serve as an anti-buoyancy anchor point for two adjacent hollow boxes. Compared to the traditional process where each box requires a separate anti-buoyancy tie rod fixing point, this solution directly reduces the number of fixing points by half. While ensuring anti-buoyancy strength, it significantly reduces drilling, fastener installation, and material usage, effectively lowering construction costs and labor consumption.

[0019] This utility model's positioning system, composed of PVC pipe fittings and connecting joints, achieves rapid assembly through standardized snap-fit ​​components, forming a precise spatial grid. The positioning support pipe directly abuts against the side wall of adjacent enclosures, ensuring the uniformity of the gaps between adjacent hollow enclosures; while the pre-fabricated slot structure on the anti-buoyancy bracket allows for quick positioning and secure binding of the No. 12 cable used to tie the enclosures. This modular design not only simplifies the installation process but also prevents insufficient concrete protective layer thickness caused by enclosure misalignment from the outset, ensuring the durability and load-bearing safety of the floor structure.

[0020] Through the above technical solution, this utility model simultaneously improves positioning accuracy and optimizes material costs while simplifying the construction process and reducing safety risks. The hollow box maintains zero displacement during concrete pouring, ensuring the accurate implementation of the design intention to reduce the self-weight of the floor slab, and avoiding the risk of rework due to the box floating, resulting in significant overall economic benefits. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a schematic diagram of the main structure of a positioning and anti-buoyancy device for a hollow slab according to the present invention.

[0023] Figure 2 This is a side view of the positioning and anti-buoyancy device for a hollow slab according to the present invention.

[0024] Figure 3 This is a schematic diagram of the installation structure of a positioning and anti-buoyancy device for a hollow slab according to the present invention.

[0025] Figure 4 The present utility model Figure 3 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0026] Figure 5 The present utility model Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0027] Figure 6 This is a schematic diagram of the connection structure between the first connecting joint and the positioning transverse tube described in this utility model;

[0028] Figure 7 This is a schematic diagram of the connection structure between the second connecting joint and the positioning support tube described in this utility model;

[0029] Figure 8 This is a schematic diagram of the main structure of the buckle component described in this utility model;

[0030] Figure 9 This is a top view of the buckle structure described in this utility model;

[0031] Figure 10 This is a top view of the anti-buoyancy support structure described in this utility model.

[0032] In the picture:

[0033] 1-Anti-buoyancy bracket, 2-Longitudinal positioning tube, 3-First connecting joint, 4-Horizontal positioning tube, 5-Second connecting joint, 6-Positioning support tube, 7-Snap fastener assembly, 8-Hollow box, 9-Line No. 12, 10-Cable tie slot. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0035] See Figure 1-10 This embodiment describes a positioning and anti-buoyancy device for a hollow slab. The hollow slab is a floor slab, and a plurality of hollow boxes 8 are arranged in an array within the hollow slab, spaced apart. The positioning and anti-buoyancy device is positioned between adjacent hollow boxes 8. The anti-buoyancy device includes an anti-buoyancy support 1, a positioning longitudinal tube 2, a first connecting joint 3, a positioning transverse tube 4, a second connecting joint 5, and a positioning support tube 6. The lower end of the positioning longitudinal tube 2 is connected to the anti-buoyancy support 1, and the upper end of the positioning longitudinal tube 2 is connected to the first connecting joint 3. Both sides of the 1 are screwed with positioning transverse tubes 4. The ends of the positioning transverse tubes 4 are connected to the second connecting joints 5. Both sides of the second connecting joints 5 are screwed with positioning support tubes 6. The positioning transverse tubes 4 are set perpendicular to the positioning longitudinal tubes 2. The positioning support tubes 6 are set perpendicular to the positioning transverse tubes 4. The anti-buoyancy bracket 1 is connected to the hollow plate. The positioning support tubes 6 on both sides of the second connecting joints 5 are in contact with the adjacent hollow boxes 8. Line 12 9 is connected to the anti-buoyancy bracket 1. Line 12 9 is used to bind all hollow boxes 8 in the transverse and longitudinal directions.

[0036] In this embodiment, the anti-buoyancy support 1 has a U-shaped structure and is made of galvanized flat steel. Symmetrical slots are provided on the anti-buoyancy support 1, and the No. 12 wire 9 is fixed within these slots. The anti-buoyancy support 1 is connected to the hollow plate using aircraft expansion tubes and color-coated self-tapping screws. The lower end of the positioning longitudinal tube 2 is connected to the anti-buoyancy support 1 via a limiting screw and a limiting nut.

[0037] The positioning longitudinal tube 2 and the first connecting joint 3, as well as the positioning transverse tube 4 and the second connecting joint 5, are connected by a buckle assembly 7. The buckle assembly 7 includes a buckle and a cable tie. The buckle has a cable tie slot 10, and the side of the positioning longitudinal tube 2 or the positioning transverse tube 4 has a through hole. The buckle is connected to the positioning longitudinal tube 2 or the positioning transverse tube 4, and the cable tie passes through the cable tie slot 10 and the through hole to secure the first connecting joint 3 or the second connecting joint 5.

[0038] The positioning longitudinal tube 2, the first connecting joint 3, the positioning transverse tube 4, the second connecting joint 5, the positioning support tube 6, and the buckle assembly 7 are all made of PVC. The hollow thickness is 300mm, the dimensions of the hollow box 8 are 600*600*180mm, and the distance between adjacent hollow boxes 8 is 100mm.

[0039] The positioning and anti-buoyancy device for the hollow slab in this embodiment is mainly used to solve the problems of the hollow box 8 floating and positioning offset during the floor slab pouring process. For example Figures 1 to 10 As shown, the device is installed between adjacent hollow boxes 8, each measuring 600×600×180mm, with a spacing of 100mm between adjacent boxes. A spatial grid structure is formed by combining anti-buoyancy supports 1 and PVC pipe fittings, achieving both anti-buoyancy and positioning functions for the boxes. Taking a 300mm thick floor slab as an example: the spacing of the anti-buoyancy supports 1 is set according to the box arrangement, and the height of the positioning longitudinal pipe 2 matches the height of the hollow box 8. The positioning longitudinal pipe 2, positioning transverse pipe 4, positioning support pipe 6, first connecting joint 3, second connecting joint 5, and snap-fit ​​assembly 7 are all made of PVC material, reducing weight and providing corrosion resistance. In actual construction, this device can completely replace the traditional double-layer cooperative operation mode, eliminating the safety risks of drilling holes and inserting reinforcement bars under the formwork, and improving construction efficiency.

[0040] Anti-buoyancy support 1 uses a Z-shaped galvanized flat steel structure, fixed to the floor slab using aircraft expansion tubes and color-galvanized self-tapping screws. For example... Figure 10 As shown, the anti-buoyancy bracket 1 has symmetrical slots on both sides for fixing the No. 12 line 9 of the hollow box 8. Its Z-shaped design can serve as an anti-buoyancy anchor point for two adjacent hollow boxes 8 at the same time, reducing the number of fixing points by half.

[0041] The lower end of the positioning longitudinal tube 2 is vertically connected to the anti-buoyancy bracket 1 via a limiting screw and a limiting nut, and the upper end extends to a height that matches the hollow box 8. Its function is to provide a vertical support reference for the positioning transverse tube 4.

[0042] The first connecting joint 3 is connected to the upper end of the positioning longitudinal tube 2 via the snap-fit ​​assembly 7. The snap-fit ​​assembly 7 consists of a snap-fit ​​element with a cable tie slot 10 and a cable tie. The cable tie passes through the through hole on the side of the positioning longitudinal tube 2 and is secured to the snap-fit ​​element to ensure that the joint and the tube are rigidly fixed.

[0043] The positioning transverse tube 4 is screwed to both sides of the first connecting joint 3 and is arranged perpendicularly to the positioning longitudinal tube 2. Its function is to extend along the gap direction of the box body, and the length of the positioning transverse tube 4 can be adjusted through the screwed structure to form a horizontal positioning frame.

[0044] The second connecting joint 5 is fixed to the end of the positioning transverse tube 4 via the snap-fit ​​assembly 7, and the connection method is similar to that of the first connecting joint 3. The positioning support tube 6 is screwed to both sides of the second connecting joint 5 and is set perpendicular to the positioning transverse tube 4. Its end directly abuts against the side wall of the adjacent hollow box 8. The length of the positioning support tube 6 can be adjusted through the screwed structure, so as to control the box gap to 100mm and adjust the gap.

[0045] Line 12 9 is used to tie the top of all hollow boxes 8 in a staggered manner along the horizontal and vertical directions, and the two ends are embedded in the slots of the anti-buoyancy bracket 1 to provide overall anti-buoyancy constraint.

[0046] During construction, the anti-buoyancy support 1 is first positioned and fixed on the floor slab formwork. Then, the longitudinal positioning pipe 2 is installed, and the transverse positioning pipes 4 are extended to both sides via the first connecting joint 3, and then connected to the positioning support pipe 6 via the second connecting joint 5, ensuring that the end of the positioning support pipe 6 is tightly against the side wall of the adjacent hollow box 8. All pipe joints are quickly locked using the snap-fit ​​assembly 7, forming a rigid spatial grid, such as... Figure 3 As shown. Finally, line 9 of line 12 is pressed onto the top of the box along the grid direction and anchored in the slot of the anti-buoyancy bracket 1.

[0047] During concrete pouring, the positioning support pipe 6 prevents the hollow box 8 from shifting horizontally, and the No. 12 line 9 is vertically anchored to the formwork by the anti-buoyancy bracket 1 to counteract the buoyancy of the concrete. The entire installation process is completed above the floor slab formwork, and a single person can operate the system to achieve zero floating and precise positioning of the box, ensuring the thickness of the concrete protective layer and the safety of the floor slab structure.

[0048] The specific embodiments of this utility model disclosed above are merely illustrative of the present utility model. These specific embodiments do not exhaustively describe all details, nor do they limit the utility model to only the described embodiments. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A positioning and anti-buoyancy device for a hollow slab, characterized in that: The hollow slab is a floor slab, and several hollow boxes (8) are arranged in an array inside the hollow slab. The hollow boxes (8) are spaced apart, and the positioning anti-buoyancy device is set between adjacent hollow boxes (8). The anti-buoyancy device includes an anti-buoyancy bracket (1), a positioning longitudinal tube (2), a first connecting joint (3), a positioning transverse tube (4), a second connecting joint (5), and a positioning support tube (6). The lower end of the positioning longitudinal tube (2) is connected to the anti-buoyancy bracket (1), and the upper end of the positioning longitudinal tube (2) is connected to the first connecting joint (3). The first connecting joint (3) has a positioning transverse tube screwed to both sides. 4) The end of the positioning transverse tube (4) is connected to the second connecting joint (5). The second connecting joint (5) is screwed with positioning support tubes (6) on both sides. The positioning transverse tube (4) is set perpendicular to the positioning longitudinal tube (2). The positioning support tube (6) is set perpendicular to the positioning transverse tube (4). The anti-buoyancy bracket (1) is connected to the hollow plate. The positioning support tubes (6) on both sides of the second connecting joint (5) are in contact with the adjacent hollow boxes (8). Line 12 (9) is connected to the anti-buoyancy bracket (1). Line 12 (9) is used to bind all hollow boxes (8) in the transverse and longitudinal directions.

2. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The anti-buoyancy support (1) has a Z-shaped structure.

3. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The anti-buoyancy support (1) is made of galvanized flat steel.

4. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The anti-buoyancy bracket (1) has symmetrical slots, and the No. 12 line (9) is fixed in the slots.

5. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The positioning longitudinal tube (2) and the first connecting joint (3) and the positioning transverse tube (4) and the second connecting joint (5) are connected by a snap-fit ​​assembly (7).

6. The positioning and anti-buoyancy device for a hollow slab according to claim 5, characterized in that: The buckle assembly (7) includes a buckle and a cable tie. The buckle has a cable tie slot (10). The positioning longitudinal tube (2) or positioning transverse tube (4) has a through hole on its side. The buckle is connected to the positioning longitudinal tube (2) or positioning transverse tube (4). The cable tie passes through the cable tie slot (10) and the through hole and then tightens the first connecting joint (3) or the second connecting joint (5).

7. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The anti-buoyancy support (1) is connected to the hollow plate using aircraft expansion tubes and color zinc self-tapping screws.

8. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The lower end of the positioning longitudinal tube (2) is connected to the anti-buoyancy bracket (1) through the cooperation of the limiting screw and the limiting nut.

9. The positioning and anti-buoyancy device for a hollow slab according to claim 5, characterized in that: The positioning longitudinal tube (2), the first connecting joint (3), the positioning transverse tube (4), the second connecting joint (5), the positioning support tube (6), and the buckle assembly (7) are all made of PVC.

10. The positioning and anti-buoyancy device for a hollow slab according to claim 1, characterized in that: The hollow thickness is 300mm, the size of the hollow box (8) is 600*600*180mm, and the distance between adjacent hollow boxes (8) is 100mm.

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