Prestressed hollow slab anti-floating device
By using a combination design of rib beam steel bar group, limit cushion strip and vertical cushion strip in prestressed hollow plates, the anti-floating problem of large span ultra-thick prestressed hollow plates is solved, ensuring the pouring quality and construction efficiency of concrete, and avoiding hidden dangers of seepage.
Patent Information
- Application Number
- CN202422096771.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-28
AI Technical Summary
In the prior art, prestressed hollow plate-filled box has insufficient buoyancy resistance under large spans and is prone to cause hidden dangers of upwelling and seepage, and the construction cost is high, affecting the quality of concrete casting.
The rib beam steel bar group is used to connect the upper and lower bidirectional steel bar group, and combine the limit pad and the vertical pad to limit the horizontal and vertical movement of the filling box, and form a stable anchoring system through the anti-floating screw and fixture to avoid the hidden danger of water seepage of wire connection.
Effectively prevent the filling box from floating or displaced during concrete pouring, ensure the quality of concrete, reduce material costs, and improve construction efficiency and structural stability.
Smart Images
Figure CN223189902U_ABST
Abstract
Description
Technical field
[0001] The present application belongs to the field of building construction technology, and specifically relates to a prestressed hollow slab anti-floating device. [Background Technology]
[0002] Cast-in-place concrete hollow-core floor slab technology offers advantages such as reduced deadweight, improved seismic performance, enhanced headroom, flexible functionality, thermal insulation, and reduced construction costs. During hollow-core floor slab construction, after the core formwork and rib beam reinforcement are tied and before concrete is poured, the core formwork must be positioned to prevent it from floating or moving horizontally to ensure high-quality concrete placement. Currently, the anti-floating design for prestressed hollow slab infill boxes typically uses wire threaded through the core formwork's center mold opening to tie the upper layer of the hollow slab's reinforcement to the bottom formwork. However, this method is only applicable to the anti-floating of the filling box of conventional prestressed hollow slabs with a thickness of ≤600mm. For large-span and ultra-thick prestressed hollow slabs, the filling box is thicker and has greater buoyancy, which can easily lead to insufficient anti-buoyancy and cause the filling box to float, resulting in cracks or insufficient flatness on the concrete surface. Secondly, the use of iron wire as an anti-floating tension member, which passes through the upper and lower layers of steel bars of the hollow slab, not only has high material costs, but also causes hidden dangers of water seepage at the connection position of the iron wire, and the iron wire needs to be polished and rust-proofed after demoulding. Thirdly, when the lower layer of steel bar support of the hollow slab is not properly set, it is easy to cause the gap between the filling box and the bottom formwork to be too small, resulting in insufficient vibration of the concrete at the bottom of the filling box and concrete falling off. [Utility Model Content]
[0003] In order to solve the problems in the prior art of anti-floating methods that there is a hidden danger of water seepage and the filling box is prone to displacement, the present application provides a prestressed hollow slab anti-floating device.
[0004] This application is achieved through the following technical solutions:
[0005] A prestressed hollow slab anti-floating device comprises a connecting assembly, a rib beam steel bar group respectively arranged on both sides of a filling box body and connected to an upper bidirectional steel bar group and a lower bidirectional steel bar group through the connecting assembly, a limiting pad arranged between the upper bidirectional steel bar group above the filling box body and the filling box body, and a standing pad arranged between the lower bidirectional steel bar group below the filling box body and the filling box body.
[0006] In the above-mentioned prestressed hollow slab anti-floating device, the rib beam reinforcement group includes rib beam upper longitudinal reinforcement, rib beam lower longitudinal reinforcement, and middle section anti-floating reinforcement sleeved around the rib beam upper longitudinal reinforcement and the rib beam lower longitudinal reinforcement.
[0007] In the above-mentioned prestressed hollow slab anti-floating device, the connection assembly includes a tie member for connecting the upper longitudinal reinforcement of the rib beam and the upper bidirectional reinforcement group or the lower longitudinal reinforcement of the rib beam and the lower bidirectional reinforcement group.
[0008] In the above-mentioned anti-floating device for a prestressed hollow slab, the connection assembly further comprises an anti-floating mechanism for connecting the lower longitudinal reinforcement of the rib beam and the lower bidirectional reinforcement group.
[0009] As described above, a prestressed hollow slab anti-floating device, the anti-floating mechanism includes an anti-floating fixing part provided on the upper surface of the bottom template, an anti-floating base provided on the lower surface of the bottom template, and an anti-floating screw passing through the anti-floating fixing part, the bottom template and the anti-floating base, the anti-floating screw is provided with a fixing nut above the anti-floating fixing part, and a base nut is provided below the anti-floating base.
[0010] In the above-mentioned anti-floating device for a prestressed hollow slab, the anti-floating fixing member is a channel steel with an opening facing right, and is used for the longitudinal reinforcement at the lower portion of the rib beam to be inserted.
[0011] In the above-mentioned prestressed hollow slab anti-floating device, the anchor is a steel wire.
[0012] In the above-mentioned prestressed hollow slab anti-floating device, the middle section anti-floating reinforcement is a rib beam closed stirrup.
[0013] In the above-mentioned prestressed hollow slab anti-floating device, the length of the erecting pad is greater than the length of the limiting pad.
[0014] In the above-mentioned prestressed hollow slab anti-floating device, the distance from the upper surface of the erection pad to the bottom template is S, and the distance from the lower surface of the limiting pad to the top of the upper bidirectional steel bar group is D.
[0015] Compared with the prior art, this application has the following advantages:
[0016] The present application discloses a prestressed hollow slab anti-floating device, which connects the upper bidirectional steel bar group and the lower bidirectional steel bar group together by means of rib beam steel bar groups arranged on both sides of the filling box, thereby limiting the horizontal movement of the filling box and achieving an anti-floating effect. In conjunction with the limiting pads placed above the filling box and the erecting pads placed below the filling box to clamp the filling box, the vertical movement of the filling box can be limited, further achieving an anti-floating effect and effectively preventing the filling box from floating or shifting during the concrete pouring process. This ensures sufficient vibration of the concrete at the bottom of the filling box, thereby ensuring the pouring quality of the concrete and avoiding problems such as cracking or insufficient flatness of the concrete surface. In addition, this solution also reduces material costs and improves construction efficiency. Since iron wire is no longer used to pass through the upper and lower steel bars of the hollow slab, the hidden danger of water seepage at the wire connection position is avoided.
Brief Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0018] Figure 1 This is an installation diagram in an embodiment of the present application;
[0019] Figure 2 is a side view of the anti-floating mechanism in an embodiment of the present application;
[0020] Figure 3 yes Figure 2 Top view of . [Specific implementation method]
[0021] In order to make the technical problems, technical solutions and beneficial effects solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0022] See also Figures 1 to 3 A prestressed hollow slab anti-floating device includes a connecting assembly 1, a rib beam steel bar group 5 respectively arranged on both sides of a filling box 2 and connecting an upper bidirectional steel bar group 3 and a lower bidirectional steel bar group 4 through the connecting assembly 1, a limiting pad 6 arranged between the upper bidirectional steel bar group 3 and the filling box 2 above the filling box 2, and a standing pad 7 arranged between the lower bidirectional steel bar group 4 and the filling box 2 below the filling box 2.
[0023] The present application discloses a prestressed hollow slab anti-floating device, which connects the upper bidirectional steel bar group and the lower bidirectional steel bar group together by means of rib beam steel bar groups arranged on both sides of the filling box, thereby limiting the horizontal movement of the filling box and achieving an anti-floating effect. In conjunction with the limiting pads placed above the filling box and the erecting pads placed below the filling box to clamp the filling box, the vertical movement of the filling box can be limited, further achieving an anti-floating effect and effectively preventing the filling box from floating or shifting during the concrete pouring process. This ensures sufficient vibration of the concrete at the bottom of the filling box, thereby ensuring the pouring quality of the concrete and avoiding problems such as cracking or insufficient flatness of the concrete surface. In addition, this solution also reduces material costs and improves construction efficiency. Since iron wire is no longer used to pass through the upper and lower steel bars of the hollow slab, the hidden danger of water seepage at the wire connection position is avoided.
[0024] Furthermore, as a preferred implementation mode of the present invention but not limitation, the rib beam reinforcement group 5 includes an upper longitudinal reinforcement 51 of the rib beam, a lower longitudinal reinforcement 52 of the rib beam, and an intermediate section of anti-floating reinforcement 53 which is sleeved around the outer periphery of the upper longitudinal reinforcement 51 of the rib beam and the lower longitudinal reinforcement 52 of the rib beam.
[0025] In this embodiment, a stronger anti-buoyancy force can be provided, effectively preventing the filling box from floating up during the concrete pouring process. At the same time, this design can also increase the stability and integrity of the rib beam and improve the bearing capacity of the structure. The middle section of the anti-floating reinforcement can be in the form of closed stirrups of the rib beam, and the stirrups are arranged around the upper longitudinal reinforcement of the rib beam and the lower longitudinal reinforcement of the rib beam to achieve reliable fixation of the filling box. This design can effectively solve the problem of insufficient anti-buoyancy caused by the large thickness and large buoyancy of the filling box in the large-span and ultra-thick prestressed hollow slab, while avoiding the hidden dangers of water seepage and rust prevention treatment problems at the connection position caused by the use of iron wire through the upper and lower steel bars of the hollow slab in the prior art.
[0026] Furthermore, as a preferred embodiment of the present invention but not a limitation, the connection assembly 1 includes an anchor 11 for connecting the upper longitudinal reinforcement 51 of the rib beam and the upper bidirectional reinforcement group 3 or the lower longitudinal reinforcement 52 of the rib beam and the lower bidirectional reinforcement group 4.
[0027] This embodiment provides reliable connection and fixation, ensuring that the filling box does not shift or float during the concrete pouring process. In this embodiment, the anchor can be in the form of steel wire, which is tied or welded between the upper longitudinal reinforcement of the rib beam and the upper bidirectional reinforcement group, or between the lower longitudinal reinforcement of the rib beam and the lower bidirectional reinforcement group, to secure the middle section of the anti-floating reinforcement.
[0028] Furthermore, as a preferred embodiment of the present invention but not limitation, the connection assembly 1 further includes an anti-floating mechanism 12 for connecting the lower longitudinal reinforcement 52 of the rib beam and the lower bidirectional reinforcement group 4 .
[0029] In this embodiment, a firm connection between the lower longitudinal reinforcement 52 of the rib beam and the lower bidirectional steel bar group 4 can be ensured, thereby effectively resisting the floating phenomenon caused by buoyancy during the concrete pouring process. This not only ensures the integrity and uniformity of the concrete structure, avoids structural deformation or damage caused by floating, but also improves the safety and reliability of construction. The anti-floating mechanism is achieved by setting an anti-floating screw through the bottom formwork and fixing nuts at both ends of the screw to achieve stable fixation of the lower longitudinal reinforcement 52 of the rib beam. The anti-floating screw can cooperate with the fixing parts and base on the bottom formwork to form a sturdy anchoring system to ensure that the longitudinal reinforcement 52 will not be displaced during the pouring process. In addition, the design of the anti-floating mechanism 12 can also take into account the convenience of construction. For example, the fixing parts can be designed to be easy to install and adjust so that construction workers can complete the installation work quickly and accurately. Through this design, the anti-floating mechanism 12 not only improves the overall performance of the prestressed hollow slab, but also optimizes the construction process, achieving a win-win situation of structural safety and construction efficiency.
[0030] Furthermore, as a preferred embodiment of the present invention but not a limitation, the anti-floating mechanism 12 includes an anti-floating fixing part 121 provided on the upper surface of the bottom template 8, an anti-floating base 122 provided on the lower surface of the bottom template 8, and an anti-floating screw 123 passing through the anti-floating fixing part 121, the bottom template 8 and the anti-floating base 122; a fixing nut 124 is provided on the anti-floating screw 123 above the anti-floating fixing part 121, and a base nut 125 is provided below the anti-floating base 122.
[0031] Furthermore, as a preferred embodiment of this solution but not a limitation, the anti-floating fixing member 121 is a channel steel with an opening facing right, and is provided for the lower longitudinal reinforcement 52 of the rib beam to be inserted.
[0032] In this embodiment, it can closely cooperate with the lower longitudinal reinforcement 52 of the rib beam to form a stable anchor point, effectively resisting the buoyancy generated during the concrete pouring process, thereby ensuring the stability of the structure during construction and use. Secondly, the opening design of the channel steel is convenient for construction personnel to operate, and the longitudinal reinforcement can be quickly and accurately inserted, which simplifies the construction process and improves construction efficiency. In addition, the high rigidity of the channel steel can provide sufficient resistance to ensure that the longitudinal reinforcement will not be displaced or deformed when subjected to force, thereby enhancing the bearing capacity and durability of the entire structure. The anti-floating fixing member 121 can be customized according to the size and shape of the lower longitudinal reinforcement 52 of the rib beam to ensure optimal fit and fixing effect. During construction, the channel steel is first fixed to the bottom formwork, and then the anti-floating screw is passed through the bottom formwork and the channel steel to insert the lower longitudinal reinforcement 52 of the rib beam into the opening of the channel steel. Finally, a secure connection is achieved by tightening the nuts at both ends of the screw. This connection method not only ensures the stability of the longitudinal reinforcement, but also facilitates construction personnel to adjust and inspect, ensuring construction quality.
[0033] Furthermore, as a preferred embodiment of this solution but not a limitation, the anchor 11 is a steel wire.
[0034] Furthermore, as a preferred embodiment of this solution but not a limitation, the middle section anti-floating reinforcement 53 is a rib beam closed stirrup.
[0035] Furthermore, as a preferred embodiment of this solution but not a limitation, the length of the erection pad 7 is greater than the length of the limiting pad 6 .
[0036] In this embodiment, the length of the erecting pads is greater than that of the limiting pads, ensuring stable support for the filling box during concrete pouring. The limiting pads are located above the filling box, primarily to limit the upward movement of the filling box. A shorter length allows for a larger area of concrete to be filled above the filling box while ensuring the limiting effect, thereby improving the quality of the pouring. This effectively addresses the problem of easy displacement of the filling box in the prior art, improving the construction quality and structural performance of the prestressed hollow slab. Furthermore, this design can reduce adjustments and proofreading during construction, thereby improving construction efficiency.
[0037] Furthermore, as a preferred embodiment of this solution but not limiting, the distance between the upper surface of the erection pad 7 and the bottom formwork 8 is S, and the distance between the lower surface of the limiting pad 6 and the upper portion of the upper bidirectional reinforcement group 3 is D. In this embodiment, the distance S is 100 mm, and the distance D is 150 mm.
[0038] The working principle of this embodiment is as follows:
[0039] The present application discloses a prestressed hollow slab anti-floating device, which connects the upper bidirectional steel bar group and the lower bidirectional steel bar group together by means of rib beam steel bar groups arranged on both sides of the filling box, thereby limiting the horizontal movement of the filling box and achieving an anti-floating effect. In conjunction with the limiting pads placed above the filling box and the erecting pads placed below the filling box to clamp the filling box, the vertical movement of the filling box can be limited, further achieving an anti-floating effect and effectively preventing the filling box from floating or shifting during the concrete pouring process. This ensures sufficient vibration of the concrete at the bottom of the filling box, thereby ensuring the pouring quality of the concrete and avoiding problems such as cracking or insufficient flatness of the concrete surface. In addition, this solution also reduces material costs and improves construction efficiency. Since iron wire is no longer used to pass through the upper and lower steel bars of the hollow slab, the hidden danger of water seepage at the wire connection position is avoided.
[0040] The above are implementation methods provided in conjunction with specific content, and the specific implementation of this application is not limited to these descriptions. Any method structure that is similar to the method structure of this application, or any technical deduction or replacement based on the concept of this application, should be considered as the scope of protection of this application.
Claims
1. A prestressed hollow slab anti-floating device, characterized in that: The invention comprises a connection assembly (1), a rib beam steel bar group (5) respectively arranged on both sides of a filling box (2) and connected to an upper bidirectional steel bar group (3) and a lower bidirectional steel bar group (4) through the connection assembly (1), a limiting pad (6) arranged between the upper bidirectional steel bar group (3) above the filling box (2) and the filling box (2), and a stand pad (7) arranged between the lower bidirectional steel bar group (4) below the filling box (2) and the filling box (2).
2. The prestressed hollow slab anti-floating device according to claim 1, characterized in that: The rib beam reinforcement group (5) comprises rib beam upper longitudinal reinforcement (51), rib beam lower longitudinal reinforcement (52), and middle section anti-floating reinforcement (53) sleeved around the rib beam upper longitudinal reinforcement (51) and the rib beam lower longitudinal reinforcement (52).
3. The prestressed hollow slab anti-floating device according to claim 2, characterized in that: The connection assembly (1) comprises an anchor (11) for connecting the upper longitudinal reinforcement (51) of the rib beam and the upper bidirectional reinforcement group (3) or the lower longitudinal reinforcement (52) of the rib beam and the lower bidirectional reinforcement group (4).
4. The prestressed hollow slab anti-floating device according to claim 3, characterized in that: The connection assembly (1) further comprises an anti-floating mechanism (12) for connecting the lower longitudinal reinforcement (52) of the rib beam and the lower bidirectional reinforcement group (4).
5. The prestressed hollow slab anti-floating device according to claim 4, characterized in that: The anti-floating mechanism (12) comprises an anti-floating fixing member (121) provided on the upper surface of the bottom template (8), an anti-floating base (122) provided on the lower surface of the bottom template (8), and an anti-floating screw (123) passing through the anti-floating fixing member (121), the bottom template (8) and the anti-floating base (122); a fixing nut (124) is provided on the anti-floating screw (123) above the anti-floating fixing member (121), and a base nut (125) is provided below the anti-floating base (122).
6. The prestressed hollow slab anti-floating device according to claim 5, characterized in that: The anti-floating fixing member (121) is a channel steel with an opening facing right, and is used for the longitudinal reinforcement (52) at the lower portion of the rib beam to be clamped in.
7. The prestressed hollow slab anti-floating device according to claim 3, characterized in that: The anchoring member (11) is a steel wire.
8. The prestressed hollow slab anti-floating device according to claim 2, characterized in that: The middle section anti-floating reinforcement (53) is a rib beam closed stirrup.
9. The prestressed hollow slab anti-floating device according to claim 1, characterized in that: The length of the erecting pad (7) is greater than the length of the limiting pad (6).
10. The prestressed hollow slab anti-floating device according to claim 5, characterized in that: The distance between the upper surface of the erection pad (7) and the bottom template (8) is S, and the distance between the lower surface of the limiting pad (6) and the upper portion of the upper bidirectional steel bar group (3) is D.