CN216380185U - Large-span column-free girder-free prestressed hollow floor slab structure - Google Patents
Large-span column-free girder-free prestressed hollow floor slab structure Download PDFInfo
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- CN216380185U CN216380185U CN202122343698.5U CN202122343698U CN216380185U CN 216380185 U CN216380185 U CN 216380185U CN 202122343698 U CN202122343698 U CN 202122343698U CN 216380185 U CN216380185 U CN 216380185U
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Abstract
The utility model relates to a large-span column-free girder-free prestressed hollow floor slab structure, which comprises a lower-layer template, a lower-layer reinforcing mesh, an empty stomach box body and an upper-layer reinforcing mesh which are sequentially arranged from bottom to top, wherein rib beam reinforcing steel bars are arranged between the upper-layer reinforcing mesh and the lower-layer reinforcing mesh, slow bonding prestressed reinforcements are arranged in the rib beam reinforcing steel bars, the rib beam reinforcing steel bars are arranged in a criss-cross mode to form a grid array, the empty stomach box body is positioned in each grid, I-shaped reinforcing steel bars are arranged on the empty stomach box body in a penetrating mode, and the upper ends and the lower ends of the I-shaped reinforcing steel bars are respectively fixed on the upper-layer reinforcing mesh and the lower-layer template. The utility model can meet the conditions of high functional requirement, high visual performance requirement, high story height requirement, large span requirement and the like of a multimedia stairway classroom, reduces the self weight of the floor slab, increases the bearing capacity of the floor slab, improves the sound insulation effect, has simple construction process, high engineering quality, short construction period, saves manpower and material resources, reduces the manufacturing cost, saves energy, protects environment, and has good popularization and application prospect and higher popularization value.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a large-span column-free girder-free prestressed hollow floor slab structure.
Background
In recent years, most multimedia classrooms in schools and other places are ladder classrooms, the conventional construction method is that the cross beam is adopted for construction, but the traditional construction method of the cross beam can cause the situation that the height of the ladder classroom layer cannot meet the requirement, and the traditional construction method of the cross beam has the problems of large floor slab self weight, limited bearing capacity, poor sound insulation effect and the like, so that the multimedia ladder classroom engineering with high functional requirement, high visual performance requirement, high layer height and large span cannot well meet the requirement.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a large-span column-free girder-free prestressed hollow floor slab structure.
The utility model is realized by the following technical scheme:
a large-span column-free girder-free prestressed hollow floor slab structure comprises a lower-layer template, wherein an upper layer reinforcing mesh and a lower layer reinforcing mesh are arranged on the lower-layer template, rib beam reinforcing steel bars are arranged between the upper layer reinforcing mesh and the lower layer reinforcing mesh and are arranged in a criss-cross mode to form a grid array, and an empty-web box body is arranged in each grid; the hollow box body is characterized in that an I-shaped steel bar is arranged at the central position of the hollow box body, the I-shaped steel bar comprises a vertical bar, a lower transverse bar is fixed at the bottom end of the vertical bar, an upper transverse bar is fixed at the top end of the vertical bar, the vertical bar penetrates through the lower-layer template, the lower-layer steel bar net piece, the hollow box body and the upper-layer steel bar net piece, the lower transverse bar is clamped below the lower-layer template, and the upper transverse bar is clamped above the upper-layer steel bar net piece.
Furthermore, a slow bonding prestressed tendon is arranged in the rib beam steel bar.
Furthermore, limiting filler strips or cushion blocks are arranged between the upper surface of the hollow box body and the upper layer of reinforcing mesh sheets and between the lower surface of the hollow box body and the lower layer of reinforcing mesh sheets.
Furthermore, the outer surface of the hollow box body is wrapped with a waterproof isolation layer, and the upper surface in the hollow box body is provided with a hard reinforcing layer.
Furthermore, the waterproof isolation layer adopts a plastic adhesive tape, and the hard reinforcing layer adopts any one of a hard plastic sheet, a density board, a ceramic sheet, a metal sheet and cement mortar with a built-in grid.
The utility model has the following beneficial effects:
1) the utility model can meet the conditions of high functional requirement, high visual performance requirement, high layer height requirement, large span requirement and the like of a multimedia step classroom, lightens the self weight of the floor slab, increases the bearing capacity of the floor slab and improves the sound insulation effect.
2) The construction process is simple, greatly shortens the construction period on the basis of ensuring the engineering quality, saves manpower and material resources, reduces the manufacturing cost, is energy-saving and environment-friendly, and has good popularization and application prospects and higher popularization value.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.
FIG. 1 is a partial top view of the structure of the present invention.
Fig. 2 is a sectional view a-a in fig. 1.
In the figure: 1-lower formwork, 2-lower reinforcing mesh, 3-upper reinforcing mesh, 4-rib beam reinforcing steel, 5-slow bonding prestressed reinforcement, 6-hollow box body, 7-I-shaped reinforcing steel and 8-limiting filler strip or cushion block.
Detailed Description
In order that those skilled in the art will better understand the present invention, a more complete and complete description of the present invention is provided below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
An embodiment of the utility model provides a large-span column-free girder-free prestressed hollow floor slab structure, as shown in fig. 1 and fig. 2, the large-span column-free girder-free prestressed hollow floor slab structure comprises a lower-layer formwork 1, wherein upper and lower-layer reinforcing mesh sheets 3 and 2 are arranged on the lower-layer formwork 1, ribbed beam reinforcing steel bars 4 are arranged between the upper and lower-layer reinforcing mesh sheets 3 and 2, slow-bonding prestressed reinforcing bars 5 are arranged in the ribbed beam reinforcing steel bars 4, the ribbed beam reinforcing steel bars 4 are arranged in a criss-cross manner to form a grid array, and each grid is provided with an empty-web box body 6; in order to better ensure the anti-floating requirement of the hollow box body 6, an I-shaped steel bar 7 penetrates through the center position of the hollow box body 6, the I-shaped steel bar 7 comprises a vertical bar, a lower transverse bar is fixed at the bottom end of the vertical bar, and an upper transverse bar is fixed at the top end of the vertical bar, wherein the vertical bar penetrates through the lower-layer template 1, the lower-layer steel mesh sheet 2, the hollow box body 6 and the upper-layer steel mesh sheet 3, the lower transverse bar is clamped below the lower-layer template 1, and the upper transverse bar is clamped above the upper-layer steel mesh sheet 3; limiting filler strips or cushion blocks 8 are arranged between the upper surface of the hollow box body 6 and the upper layer reinforcing mesh 3 and between the lower surface of the hollow box body 6 and the lower layer reinforcing mesh 2; the outer surface of the hollow box body 6 is wrapped with a waterproof isolating layer, and the upper surface in the hollow box body 6 is provided with a hard reinforcing layer.
In the above embodiment, the slow bonding prestressed tendons 5 are arranged in the rib beam steel bars 4, and the slow bonding prestressed tendons 5 include longitudinal prestressed tendons and transverse prestressed tendons, wherein the longitudinal prestressed tendons mainly apply longitudinal pressure to the concrete at the lower part of the beam body, so as to ensure that the concrete at the lower part of the beam body does not have tensile stress under the vertical load; the transverse prestressed tendons mainly apply transverse pressure to the beam body, and ensure that the transverse shear tensile stress does not occur to the concrete under the condition that the beam body is subjected to the torsional force.
In the above embodiment, each empty stomach box 6 is provided with an i-shaped steel bar 7, the i-shaped steel bar 7 penetrates through the empty stomach box 6 and is arranged between the upper and lower layer reinforcing mesh sheets 3 and 2, the i-shaped steel bar 7 is integrally made of a phi 6 steel bar, the lower transverse bar of the i-shaped steel bar 7 is fixed below the lower layer formwork 1 in advance, the upper transverse bar of the i-shaped steel bar 7 is welded and fixed with the upper layer reinforcing mesh sheet 3, and the empty stomach box 6 achieves a good anti-floating effect due to the arrangement of the i-shaped steel bar 7, and has the advantages of being simple in arrangement and firm in fixation.
In the above embodiment, the waterproof isolation layer is made of a plastic adhesive tape, and the hard reinforcing layer is made of any one of a hard plastic sheet, a density board, a ceramic sheet, a metal sheet and cement mortar with a built-in grid.
In the above embodiment, for the laying of the electric wire pipes, the electric wire pipes should be horizontally and vertically laid in the place where the hollow box 6 is located, the horizontal direction is perpendicular to the hollow box 6, and the solid areas at the two ends should be moved, if the opening of the hollow box 6 cannot be implemented, a channel is left for the electric wire pipes, and then the opening of the hollow box 6 is repaired and reinforced.
When the hollow floor slab structure of the embodiment is subjected to concrete pouring and vibrating, commercial concrete is adopted for pouring, the slump of the concrete is not less than 180mm, the maximum particle size of coarse aggregate in the concrete is less than 25mm, and the concrete is poured by two times. When vibrating, the step pressure should be avoided from colliding the prestressed tendons 5, the end embedded parts and the hollow box body 6, the concrete is poured to about 1/2 of the thickness of the plate when the concrete is poured for the first time, and the vibration should be carefully carried out to ensure the compactness of the concrete, especially the leakage vibration is strictly prohibited around the bearing plate and the anchor plate (not mentioned in the embodiment) and at the bottom of the hollow box body 6, and the concrete does not have honeycombs or holes. And (3) after the concrete is finally set (2-3 days after pouring), removing the end mould in time, wherein the tensioning temperature meets the standard requirement, and cleaning a tensioning end.
The technical solutions in the embodiments of the present invention are clearly and completely described above, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a large-span does not have post no girder prestressed hollow floor structure which characterized in that: the steel bar reinforced concrete hollow slab comprises a lower-layer template, wherein an upper layer steel bar mesh and a lower layer steel bar mesh are arranged on the lower-layer template, rib beam steel bars are arranged between the upper layer steel bar mesh and the lower layer steel bar mesh, the rib beam steel bars are arranged in a criss-cross mode to form a grid array, and an empty-web box body is arranged in each grid; the hollow box body is characterized in that an I-shaped steel bar is arranged at the central position of the hollow box body, the I-shaped steel bar comprises a vertical bar, a lower transverse bar is fixed at the bottom end of the vertical bar, an upper transverse bar is fixed at the top end of the vertical bar, the vertical bar penetrates through the lower-layer template, the lower-layer steel bar net piece, the hollow box body and the upper-layer steel bar net piece, the lower transverse bar is clamped below the lower-layer template, and the upper transverse bar is clamped above the upper-layer steel bar net piece.
2. The large-span column-free girder-free prestressed hollow floor slab structure according to claim 1, wherein: the ribbed beam steel bar is internally provided with a slow bonding prestressed tendon.
3. The large-span column-free girder-free prestressed hollow floor slab structure according to claim 1 or 2, wherein: and limiting filler strips or cushion blocks are arranged between the upper surface of the hollow box body and the upper layer reinforcing mesh sheet and between the lower surface of the hollow box body and the lower layer reinforcing mesh sheet.
4. The large-span column-free beamless prestressed hollow floor slab structure of claim 3, wherein: the outer surface of the hollow box body is wrapped with a waterproof isolating layer, and the upper surface in the hollow box body is provided with a hard reinforcing layer.
5. The large-span column-free beamless prestressed hollow floor slab structure of claim 4, wherein: the waterproof isolation layer adopts a plastic adhesive tape, and the hard reinforcing layer adopts any one of a hard plastic sheet, a density board, a ceramic sheet, a metal sheet and cement mortar with a built-in grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343698.5U CN216380185U (en) | 2021-09-27 | 2021-09-27 | Large-span column-free girder-free prestressed hollow floor slab structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343698.5U CN216380185U (en) | 2021-09-27 | 2021-09-27 | Large-span column-free girder-free prestressed hollow floor slab structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216380185U true CN216380185U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122343698.5U Active CN216380185U (en) | 2021-09-27 | 2021-09-27 | Large-span column-free girder-free prestressed hollow floor slab structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216380185U (en) |
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2021
- 2021-09-27 CN CN202122343698.5U patent/CN216380185U/en active Active
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