Prestressed hollow slab
By designing the core module, anti -floating tendons and anti -floating tension grids in the prestressed hollow panel, the problem of difficulties in the fixation and position adjustment of the existing technology of the existing technology, and achieved higher construction quality and practicality.
Patent Information
- Application Number
- CN202420608267.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-27
AI Technical Summary
When casting and using existing prestressed hollow plates, it is difficult to effectively fix the core module, adjust the position and relative distance between the core module at the bottom of the plate and the top of the plate, and cannot effectively protect the core module when prestress is applied. Impacts construction quality and practicality.
Design a prestressed hollow board, including the core module, anti -floating tendon and anti -floating tension grid, and achieve effective fixing of the core module by setting up limited pads, anti -floating tendons and anti -floating tubing racks to achieve the core module Adjust the position and protect the core module when applying prestressing.
Effectively avoids the core module to float and deviate from the position during the pouring process, improve the quality and practicality of construction, and ensure the overall carrying capacity and anti -impact performance of the prestressed board.
Smart Images
Figure CN222413661U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hollow slabs, in particular to a prestressed hollow slab. Background Art
[0002] As we all know, the application of GFM lightweight core module in prestressed hollow slab is characterized by the hollow middle of the cross-sectional shape of the slab. This hollow structure can effectively save concrete usage, reduce structural deadweight, reduce project cost, and reduce earthquake effects. At the same time, the overall bearing capacity of the slab is enhanced through prestressing technology. It is often used in bridges, buildings and tunnel projects. It is a commonly used component in structural engineering with good strength and bearing capacity.
[0003] For example, patent number CN214498021U discloses a multi-purpose prestressed hollow slab, including a prefabricated hollow slab, wherein a circular hollow hole is arranged inside the prefabricated hollow slab, a spacing layer is fixedly arranged on the top of the prefabricated hollow slab, a sound insulation layer is fixedly arranged on the top of the spacing layer, a protective layer is fixedly arranged on the top of the sound insulation layer, a cushion layer is fixedly arranged on the top of the protective layer, a support pipe is movably installed on the inner side of the hollow hole, and a support frame is fixedly installed on the inner side of the support pipe. When the multi-purpose prestressed hollow slab is in use, the setting of the protective layer and the setting of the protective layer can provide a certain impact resistance for the prefabricated hollow slab below, while the cushion layer provides a casting plane for construction, and the support pipe can support the hollow hole to strengthen the structural strength of the hollow slab, and the setting of the support frame can also ensure that the support pipe will not be abnormally deformed. Through the above setting, it has the advantages of adding impact resistance and sound insulation to the original floor slab; however, when the above prestressed hollow slab is cast and used, there are:
[0004] (1) The core molds are arranged in a matrix between the steel mesh at the bottom and the steel mesh at the top of the slab, and support connectors are arranged between the core molds. The core molds are fixed by the support connectors. Although the core molds can be prevented from floating up or moving horizontally during concrete pouring, the arrangement of the support connectors makes it inconvenient to adjust the fixed spacing of the core molds according to the area of the floor slab, thereby affecting the construction quality of the floor slab and resulting in low practicality;
[0005] (2) The core mold is in direct contact with the bottom steel mesh and the top steel mesh of the slab, which makes it impossible to effectively control the relative distance between the core mold and the bottom steel mesh and the top steel mesh of the slab during pouring. As a result, the stressed steel bars are in direct contact with the core mold. When prestressing the stressed steel bars, it is easy to cause the core mold to deform and deviate from its position, affecting the construction quality of the floor slab.
[0006] Therefore, the utility model designs a novel prestressed hollow slab to solve the problems existing in the above-mentioned prior art. Utility Model Content
[0007] In view of the deficiencies in the prior art, the utility model provides a prestressed hollow slab, which has the advantages of good core module fixing effect, convenient adjustment of the position of the core module between the bottom steel mesh and the top steel mesh of the slab and the relative distance between the core modules, and effective protection of the core module when prestress is applied. It solves the problems of the existing prestressed hollow slab that are unable to effectively fix the core module, adjust the position of the core module between the bottom steel mesh and the top steel mesh of the slab and the relative distance between the core modules, and are unable to effectively protect the core module when prestress is applied.
[0008] In order to achieve the above-mentioned purpose of effectively fixing the core module, conveniently adjusting the position of the core module between the steel mesh at the bottom of the slab and the steel mesh at the top of the slab and the relative distance between the core modules, and effectively protecting the core module when applying prestress, the utility model provides the following technical solutions:
[0009] A prestressed hollow slab comprises a core module, anti-floating through bars and an anti-floating tension bar grid; the core module is fixedly arranged between an upper steel mesh and a lower steel mesh, and a limited spacer is arranged between the core module and the lower steel mesh, connected to the core module and the lower steel mesh respectively, so as to fix the position of the core module, so as to avoid the position of the core module changing when the stressed steel bars of the lower steel mesh are subjected to prestress, thereby ensuring the casting quality of the prestressed slab; the anti-floating through bars are arranged on the upper side of the core module, between the upper steel mesh and the core module, and connected to the lower steel mesh through anti-floating tension pieces, so as to avoid the core module floating up due to the buoyancy of concrete during casting; the anti-floating tension bar grid is arranged between adjacent core modules, and connected to the upper steel mesh and the lower steel mesh respectively, so as to avoid the upper steel mesh floating up during casting, thereby ensuring the construction quality.
[0010] Preferably, the anti-floating reinforcement is arranged in the same direction as the transverse reinforcement arrangement direction of the upper and lower steel meshes, and a plurality of anti-floating tie nodes are arranged on the anti-floating reinforcement for use in conjunction with the anti-floating tie rod grid. To ensure good tie force, the plurality of anti-floating tie nodes are arranged in a plum blossom shape on the anti-floating reinforcement.
[0011] Preferably, the anti-floating tensioning grid is located between adjacent core modules and connected to the outer transverse steel bars of the upper steel mesh and the lower steel mesh, and is used to control the relative position of the upper steel mesh and the lower steel mesh in the floor height direction to prevent the upper steel mesh from floating up during the pouring process, and at the same time plays a role in horizontally positioning the core module to prevent the core module from changing position during pouring.
[0012] Preferably, the anti-floating member is located between adjacent core modules, and the upper end of the anti-floating member is connected to the anti-floating reinforcement, and the lower end is connected to the outer transverse reinforcement of the lower reinforcement mesh. At the same time, after pouring, a connecting column is formed between the upper and lower plates of the hollow floor slab to ensure the quality and strength of the floor slab.
[0013] Preferably, the limiting pad is a steel stirrup welded and fixed on the lower steel mesh, and the upper side of the steel stirrup is fixedly connected to the core module, so as to control the distance and position of the inner core module as needed during use.
[0014] Preferably, the anti-floating tension member includes a middle tension rod and end fasteners matched therewith, the end fasteners are screwed on both ends of the middle tension rod, and the ends of the end fasteners are flat semicircular tension plates matched with the upper steel mesh and the lower steel mesh; when in use, by adjusting the connection relationship between the end fasteners and the middle tension rod, it can be suitable for use with prestressed hollow slabs of different plate thicknesses, and at the same time, setting the semicircular tension plate to a flat shape can effectively prevent it from extending out of the protective layer, thereby ensuring the aesthetics of the prestressed hollow slab after casting.
[0015] Preferably, in order to reduce the weight of the prestressed hollow slab, the core module is designed to be an ADS lightweight solid inner mold to form a lightweight inner mold concrete hollow floor slab.
[0016] Compared with the prior art, the utility model provides a prestressed hollow slab, which has the following beneficial effects:
[0017] The utility model designs a prestressed hollow slab, including a core module, anti-floating through bars and an anti-floating tension bar grid. The core module is fixedly arranged between an upper steel mesh and a lower steel mesh. The anti-floating through bars are arranged on the upper side of the core module and connected to the lower steel mesh through an anti-floating tension piece. The anti-floating tension bar grid is arranged between adjacent core modules and respectively connected to the upper steel mesh and the lower steel mesh. When in use:
[0018] 1. By setting up anti-floating reinforcement and anti-floating tension parts, the core module can be fully prevented from floating up due to the buoyancy of concrete during pouring, thus ensuring the pouring effect of the hollow slab;
[0019] 2. By setting up an anti-floating reinforcement grid, the upper steel mesh and the lower steel mesh are formed into a whole, which can effectively prevent the upper steel mesh from floating during the pouring process;
[0020] 3. By setting the limiting pads, the position of the core module between the bottom steel mesh and the top steel mesh of the slab and the relative distance between the core modules can be adjusted as needed during use. At the same time, the core module can be effectively protected when prestressing is applied, avoiding the change of the position of the core module when the stress steel bars of the lower steel mesh are applied, thereby ensuring the casting quality of the prestressed slab;
[0021] 4. By setting anti-floating wire, the lower steel mesh is connected to the template to form an anti-floating structure, which can effectively prevent the lower steel mesh from floating up; the purpose of effectively fixing the core module, facilitating the adjustment of the position of the core module between the bottom steel mesh and the top steel mesh of the slab and the relative distance between the core modules, and effectively protecting the core module when prestressing is applied is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a top view of the prestressed hollow slab of the utility model;
[0023] Figure 2 This is a cross-sectional view of the prestressed hollow slab of the utility model when the AA position is not poured;
[0024] Figure 3 This is a cross-sectional view of the prestressed hollow slab of the utility model after pouring at AA;
[0025] Figure 4 This is an exploded view of the anti-floating pull member of the utility model;
[0026] Figure 5 It is a structural schematic diagram of the limiting pad strip of the utility model.
[0027] In the figure: 1. core module, 2. anti-floating reinforcement, 21. anti-floating tension node, 3. anti-floating tension reinforcement grid, 4. anti-floating tension member, 41. middle tension rod, 42. end fastener, 5. upper steel mesh, 6. lower steel mesh, 7. limit pad, 8. anti-floating wire. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] See also Figure 1-5 The utility model provides a technical solution: a prestressed hollow slab, comprising a core module 1, anti-floating reinforcement 2 and an anti-floating reinforcement grid 3;
[0030] The core module 1 is fixedly arranged between the upper steel mesh 5 and the lower steel mesh 6, and a limited spacer strip 7 is arranged between the core module 1 and the lower steel mesh 6, and is connected to the core module 1 and the lower steel mesh 6 respectively, so as to fix the position of the core module 1, so as to avoid the position of the core module 1 changing when the stress steel bars of the lower steel mesh 6 are prestressed, so as to ensure the casting quality of the prestressed slab;
[0031] The anti-floating reinforcement 2 is arranged on the upper side of the core module 1, between the upper steel mesh 5 and the core module 1, and connected to the lower steel mesh 6 through the anti-floating tension member 4 to prevent the core module 1 from floating up due to the buoyancy of concrete during pouring;
[0032] The anti-floating reinforcement grid 3 is arranged between adjacent core modules 1 and connected to the upper reinforcement mesh 5 and the lower reinforcement mesh 6 respectively to prevent the upper reinforcement mesh 5 from floating during the pouring process and ensure the construction quality.
[0033] As a preferred embodiment, Figure 1 , Figure 2 and Figure 3 As shown, in order to reduce the weight of the prestressed hollow slab, the core module 1 is designed to be an ADS lightweight solid inner mold to form a lightweight inner mold concrete hollow floor slab. The specification of the ADS lightweight solid inner mold is 600×600×400mm.
[0034] As a preferred embodiment, Figure 1 As shown, in order to prevent the core module 1 from floating, the anti-floating reinforcement 2 is arranged in the same direction as the transverse reinforcement arrangement direction of the upper steel mesh 5 and the lower steel mesh 6. Two parallel anti-floating reinforcements 2 are arranged on a core module 1, and a plurality of anti-floating tie nodes 21 are arranged on the anti-floating reinforcement 2 for use in conjunction with the anti-floating tie grid 3. In order to ensure good tie force, the plurality of anti-floating tie nodes 21 are arranged in a plum blossom shape on the anti-floating reinforcement 2.
[0035] As a preferred embodiment, Figure 2 and Figure 3 As shown, in order to prevent the upper steel mesh 5 from floating up during the pouring process, the anti-floating tensioning grid 3 is designed to be located between adjacent core modules 1 and connected to the outer transverse steel bars of the upper steel mesh 5 and the lower steel mesh 6, so as to control the relative position of the upper steel mesh 5 and the lower steel mesh 6 in the floor height direction to prevent the upper steel mesh 5 from floating up during the pouring process, and at the same time play the role of horizontally positioning the core module 1 to prevent the position of the core module 1 from changing during pouring.
[0036] As a preferred embodiment, Figure 2 and Figure 3 As shown, in order to prevent the core module 1 from floating during use and to facilitate construction, an anti-floating tension member 4 is arranged in the anti-floating tensioning grid 3, and the upper end of the anti-floating tension member 4 is connected to the anti-floating through reinforcement 2, and the lower end is connected to the outer transverse reinforcement of the lower reinforcement mesh 6. At the same time, after pouring, a connecting column is formed between the upper and lower plates of the hollow floor slab to ensure the quality and strength of the floor slab.
[0037] As a preferred embodiment, Figure 4As shown, in order to facilitate the connection between the upper steel mesh 5 and the lower steel mesh 6 and prevent the upper steel mesh 5 from floating up during pouring, the anti-floating tension member 4 is designed to include a middle pull rod 41 and end fasteners 42 used in conjunction with it, the end fasteners 42 are screwed and installed at both ends of the middle pull rod 41, and the ends of the end fasteners 42 are provided as flat semicircular pull plates used in conjunction with the upper steel mesh 5 and the lower steel mesh 6; when in use, by adjusting the connection relationship between the end fasteners 42 and the middle pull rod 41, it can be suitable for use with prestressed hollow slabs of different plate thicknesses, and at the same time, setting the semicircular pull plate to a flat shape can effectively prevent it from extending out of the protective layer, thereby ensuring the aesthetics of the prestressed hollow slab after pouring.
[0038] As a preferred embodiment, Figure 2 , Figure 3 and Figure 4 As shown, in order to avoid the position change of the core module 1 when the prestress is applied to the stressed steel bars of the lower steel mesh 6, the limiting pad 7 is designed to be a steel stirrup welded and fixed on the lower steel mesh 6, and the upper side of the steel stirrup is fixedly connected to the core module 1. Two steel stirrups are arranged on the lower side of each core module 1, which can be manufactured according to on-site needs to ensure the thickness of the lower plate.
[0039] As a preferred embodiment, Figure 2 , Figure 3 and Figure 4 As shown, in order to facilitate the control of the thickness of the lower steel bar protection layer during pouring and prevent the lower steel mesh 6 from floating up, an anti-floating wire 8 is also installed on the lower steel mesh 6. The upper end of the anti-floating wire 8 is connected to the longitudinal steel bars of the lower steel mesh 6, and the lower end passes through the formwork and is connected to the formwork. The anti-floating point of the lower steel mesh 6 starts from 300mm from the beam edge and has a longitudinal and transverse spacing of 1000mm, arranged in a plum blossom shape.
[0040] The construction process of the prestressed hollow slab of the utility model includes:
[0041] First, before construction, the upper steel mesh 5 and the lower steel mesh 6 are tied on the steel shed, and the lower template of the hollow slab is supported while the steel mesh is tied; then the lower steel mesh 6 is installed after the template is supported, and after the installation of the lower steel mesh 6 is completed, the anti-floating iron wire 8 is tied to connect the lower steel mesh 6 with the lower template to prevent the lower steel mesh 6 from floating; then the core module 1 is installed on the lower steel mesh 6 as needed, and during the installation of the core module 1, the spacing of the core module 1 is controlled, the limiting pad 7 is installed and welded to the lower steel mesh 6, and the core module 1 is positioned using it, and after the installation of the core module 1 is completed, the anti-floating through reinforcement 2 is arranged, and the anti-floating through reinforcement 2 is connected to the lower steel mesh 6 using the anti-floating tension piece 4 to prevent the core module 1 from floating due to the buoyancy of the concrete; finally, the upper steel mesh 5 is installed, and the anti-floating tensioning grid 3 is installed, and the upper steel mesh 5 is connected to the lower steel mesh 6 using the anti-floating tensioning grid 3, and the side form is supported, and pouring is performed after the support.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A prestressed hollow slab, characterized in that: It comprises a core module (1), anti-floating reinforcement (2) and an anti-floating reinforcement grid (3); The core module (1) is fixedly arranged between the upper steel mesh (5) and the lower steel mesh (6), and a plurality of limiting pads (7) are arranged between the core module (1) and the lower steel mesh (6); The anti-floating reinforcement (2) is arranged on the upper side of the core module (1) and is located between the upper steel mesh (5) and the core module (1), and is connected to the lower steel mesh (6) via the anti-floating tension member (4); The anti-floating tensioning steel bar grid (3) is arranged between the upper steel mesh (5) and the lower steel mesh (6), and is respectively connected to the upper steel mesh (5) and the lower steel mesh (6).
2. A prestressed hollow slab according to claim 1, characterized in that: The anti-floating reinforcement (2) is arranged in the same direction as the transverse reinforcement arrangement direction of the upper reinforcement mesh (5) and the lower reinforcement mesh (6), and a plurality of anti-floating tension nodes (21) are arranged on the anti-floating reinforcement (2) to match the anti-floating tension reinforcement grid (3).
3. A prestressed hollow slab according to claim 2, characterized in that: The plurality of anti-floating tension nodes (21) are arranged in a plum blossom shape on the anti-floating reinforcement (2).
4. A prestressed hollow slab according to claim 1, characterized in that: The anti-floating tension reinforcement grid (3) is located between adjacent core modules (1) and is connected to the outer transverse reinforcements of the upper reinforcement mesh (5) and the lower reinforcement mesh (6).
5. The prestressed hollow slab according to claim 1, characterized in that: The anti-floating member (4) is arranged between adjacent core modules (1), and the upper end of the anti-floating member (4) is connected to the anti-floating reinforcement (2), and the lower end is connected to the outer transverse reinforcement of the lower reinforcement mesh (6).
6. A prestressed hollow slab according to claim 1, characterized in that: The limiting pad strip (7) is a steel stirrup welded and fixed on the lower steel mesh (6), and the upper side of the steel stirrup is fixedly connected to the core module (1).
7. The prestressed hollow slab according to claim 1, characterized in that: The anti-floating tension member (4) comprises a middle tension rod (41) and end fasteners (42) adapted thereto, wherein the end fasteners (42) are screwed onto both ends of the middle tension rod (41), and the ends of the end fasteners (42) are flat semicircular tension plates adapted to the upper steel mesh (5) and the lower steel mesh (6).
8. The prestressed hollow slab according to claim 1, characterized in that: The core module (1) is an ADS lightweight solid inner mold.