CN114075855A - Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab - Google Patents
Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab Download PDFInfo
- Publication number
- CN114075855A CN114075855A CN202111604441.9A CN202111604441A CN114075855A CN 114075855 A CN114075855 A CN 114075855A CN 202111604441 A CN202111604441 A CN 202111604441A CN 114075855 A CN114075855 A CN 114075855A
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- Prior art keywords
- floor slab
- transverse
- beams
- composite floor
- extension
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 13
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 8
- 239000004567 concrete Substances 0.000 claims abstract description 26
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000005336 cracking Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920006327 polystyrene foam Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab, wherein the composite light concrete multi-ribbed sandwich composite floor slab consists of a bottom plate, a longitudinal rib beam, a transverse rib beam and light filling blocks, the light filling blocks are clamped in a cavity formed by the bottom plate, the longitudinal rib beam and the transverse rib beam, the upper end of the longitudinal rib beam is provided with an extension beam, transverse reinforcing steel bars are arranged between the extension beams in a hanging manner, grouting through holes for transverse post-tensioned prestressing construction are arranged in the transverse rib beam, a plurality of longitudinally arranged stirrups are arranged on the longitudinal rib beam and the extension beams, connecting reinforcing steel bars are inserted into the grouting through holes, post-cast concrete is used for connecting the superposed floor slabs, the superposed floor slab has light self weight, is convenient to carry, has low manufacturing cost and good heat preservation effect, and the post-cast concrete and the composite floor slab can be stably and bidirectionally combined, so that the floor slab has high structural strength and is not easy to crack.
Description
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab.
Background
With the development of modern industrial technology, the fabricated concrete building gradually replaces the cast-in-place concrete structural system in the prior art with the advantages of high construction speed, resource saving, small restriction of climate conditions, labor saving and the like, but the laminated floor slabs used in the fabricated building are basically solid concrete slabs, have great self weight and limited use span, and are not beneficial to the design of large-space buildings.
Disclosure of Invention
The invention aims to solve the problems of the existing large-span composite floor slab, and provides a large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab.
In order to achieve the purpose, the invention adopts the following technical scheme:
a large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab is composed of bottom plate, longitudinal ribbed beams, transverse ribbed beams and light filler blocks, which are clamped in the cavity formed by bottom plate, longitudinal ribbed beams and transverse ribbed beams.
Furthermore, the upper end of the longitudinal rib beam is provided with an extension beam, two sides of the extension beam extend towards the light filling blocks and are used for limiting the upper parts of the light filling blocks, and a transverse reinforcing steel bar is arranged between the extension beams in a hanging mode and is used for reinforcing the combination of post-cast concrete and a laminated floor slab.
Furthermore, a plurality of stirrups which are longitudinally arranged are arranged on the longitudinal rib beam and the extension beam, and the stirrups are connected with the prestressed steel bars at the bottom through the erection steel bars at the upper part, so that the structural strength of the floor slab can be enhanced, and the cracking of the floor slab is reduced. The upper ends of the stirrups extend out of the upper part of the extension beam and are used for reinforcing the combination of post-cast concrete and the composite floor slab.
Furthermore, a grouting through hole penetrating through the transverse rib beam is formed in the transverse rib beam and used for inserting reinforcing steel bars and grouting during transverse post-tensioning prestress construction.
Preferably, the two sides of the bottom plate are provided with protruding flanges, and when the composite floor slabs are transversely connected, concrete can be poured into the upper spaces of the flanges to strengthen the connection between the composite floor slabs.
Preferably, the bottom plate is made of glass fiber grid reinforced concrete thin plates, so that the structural strength of the floor slab is guaranteed, and the self weight of the floor slab can be greatly reduced.
Preferably, the longitudinal rib beams, the transverse rib beams and the extension beams adopt lightweight aggregate structural concrete with volume weight smaller than the strength of more than 30Mpa, the weight is light, the heat bridge effect of the rib beams is reduced, and the heat preservation effect is good.
Preferably, the volume weight of the light filling block is less than 10kg/m3The polystyrene foam board has light weight and heat preservation effect.
When the laminated floors are transversely connected, the grouting through holes between the adjacent laminated floors are corresponding in position and the flanges are attached to each other, then prestressed steel bars are inserted into the grouting through holes, after post-cast laminated concrete reaches the tensile strength, prestressed tensioning is carried out, grouting is carried out to form transverse prestressed rib beams, and finally the complete bidirectional prestressed laminated floors are obtained. The connecting steel bars, the transverse steel bars, the stirrups and the prestressed steel bars can form bidirectional combination between the laminated floor slab and the post-cast concrete, the combination degree of the post-cast layer and the laminated layer of the floor slab is improved, and the obtained floor slab is high in structural strength and not prone to cracking.
Compared with the prior art, the invention has the beneficial effects that:
1. the composite floor slab is a bidirectional prestressed ribbed sandwich composite floor slab, and has the advantages of light dead weight, large bearing capacity and large application span.
2. This coincide floor sets up horizontal reinforcing bar between the extension beam, and has worn the prestressed reinforcement in the horizontal through-hole, sets up the stirrup on vertical rib roof beam and the extension beam, and three reinforcing bar can improve the two-way combination degree between post-cast concrete and the coincide floor, and connecting reinforcement combines with post-cast concrete simultaneously, further strengthens the joint strength between the coincide floor.
3. The bottom plate material of the composite floor slab is a glass fiber grid reinforced concrete thin plate, the longitudinal rib beams, the transverse rib beams and the extension beams adopt light aggregate structural concrete, and the light filling blocks are foam plates, so that the floor slab is light in self weight, convenient to carry, low in manufacturing cost and good in heat insulation effect.
Drawings
FIG. 1 is a schematic structural view of the composite floor slab;
FIG. 2 is a schematic view of a longitudinal section of the composite floor slab;
FIG. 3 is a schematic structural view of the stirrup of the composite floor slab;
fig. 4 is a schematic structural view of the transverse connection of the composite floor slab.
In the figure: 1. a base plate; 2. grouting the through hole; 3. a longitudinal rib beam; 4. a transverse rib beam; 5. a lightweight filling block; 6. an extension beam; 7. transverse reinforcing steel bars; 8. a flange; 9. erecting steel bars; 10. hooping; 11. pre-stressing the steel bars; 12. connecting reinforcing steel bars; 13. and post-pouring concrete.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, the large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab consists of a bottom plate 1, longitudinal rib beams 3, transverse rib beams 4 and light filling blocks 5, wherein the light filling blocks 5 are clamped in a cavity formed by the bottom plate 1, the longitudinal rib beams 3 and the transverse rib beams 4.
Further, the upper end of the longitudinal rib beam 3 is provided with an extension beam 6, two sides of the extension beam 6 extend towards the light filling block 5 and are used for limiting the upper part of the light filling block 5, and a transverse reinforcing steel bar 7 is arranged between the extension beams 6 in a suspending manner and is used for reinforcing the connection between the post-cast concrete 13 and the prefabricated composite floor slab.
Furthermore, a plurality of stirrups 10 which are longitudinally arranged are arranged on the longitudinal rib beam 3 and the extension beam 6, and the stirrups 10 are connected with the prestressed reinforcement 11 at the bottom through the erection reinforcement 9 at the upper part, so that the structural strength of the floor slab can be enhanced, and the cracking of the floor slab is reduced. The upper ends of the stirrups 10 extend out of the upper part of the extension beam 6 and are used for reinforcing the combination of post-cast concrete and the prefabricated composite floor slab.
Furthermore, a grouting through hole 2 penetrating through the transverse rib beam 4 is formed in the transverse rib beam 4, and the grouting through hole 2 is used for construction of transverse post-tensioning prestress.
In this embodiment, the two sides of the bottom plate 1 are provided with the protruded flanges 8, and when the composite floor slab is transversely connected, the upper space of the flanges 8 can be poured with concrete to strengthen the connection between the composite floor slabs.
In this embodiment, the material of bottom plate 1 is glass fiber net reinforcing concrete sheet, guarantees the structural strength of floor, and can reduce the dead weight of floor greatly.
In the embodiment, the longitudinal rib beams 3, the transverse rib beams 4 and the extension beams 6 are made of lightweight aggregate structural concrete with the strength greater than 30Mpa, so that the weight is light, the heat bridge effect of the rib beams is reduced, and the heat insulation effect is good.
In this embodiment, the lightweight filling block 5 has a volume weight of less than 10kg/m3The polystyrene foam board has light weight and heat preservation effect.
Referring to fig. 3, when the composite light concrete multi-ribbed sandwich composite floor slab is transversely connected, the grouting through holes 2 between adjacent composite floor slabs are corresponding in position and the flanges 8 are attached to each other, prestressed steel bars are inserted into the grouting through holes, after the post-cast composite layer concrete reaches the tensile strength, prestressed tensioning and grouting are performed to form transverse prestressed rib beams, and finally, the complete bidirectional prestressed composite floor slab is obtained. The connecting steel bars 12, the transverse steel bars 7, the stirrups 10 and the prestressed steel bars 9 can form bidirectional combination between the laminated floor slab and the post-cast concrete 13, the combination degree of the post-cast layer and the laminated layer of the floor slab is improved, and the obtained floor slab is high in structural strength and not prone to cracking.
The composite floor slab in the embodiment has the advantages of light self weight, convenience in carrying, low manufacturing cost, good heat insulation effect and stable two-way combination between the post-cast concrete and the composite floor slab.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab is characterized by comprising a bottom plate (1), longitudinal rib beams (3), transverse rib beams (4) and light filling blocks (5), wherein the light filling blocks (5) are clamped in a cavity formed by the bottom plate (1), the longitudinal rib beams (3) and the transverse rib beams (4); the upper end of the longitudinal rib beam (3) is provided with an extension beam (6), two sides of the extension beam (6) extend towards the light filling block (5), transverse reinforcing steel bars (7) are arranged between the extension beams (6) in a hanging mode, a plurality of longitudinally-arranged stirrups (10) are arranged on the longitudinal rib beam (3) and the extension beam (6), the stirrups (10) are connected with prestressed reinforcing steel bars (11) at the bottom through erection reinforcing steel bars (9) at the upper part, and the upper ends of the stirrups (10) extend out of the upper part of the extension beam (6);
and a grouting through hole (2) which penetrates through the transverse rib beam (4) and is used for transverse post-tensioned prestressing construction is arranged in the transverse rib beam (4).
2. A laminated floor slab, according to claim 1, characterised in that the floor slab (1) is provided with projecting flanges (8) on both sides.
3. Composite floor slab according to claim 2, characterised in that the material of the bottom slab (1) is a glass fibre mesh reinforced concrete sheet.
4. The composite floor slab as claimed in claim 2, characterised in that the longitudinal rib beams (3), the transverse rib beams (4) and the extension beams (6) are of lightweight aggregate structural concrete with strength greater than 30 Mpa.
5. Composite floor slab according to claim 2, characterised in that said lightweight filling blocks (5) have a bulk density of less than 10kg/m3Polystyrene foam board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111604441.9A CN114075855A (en) | 2021-12-25 | 2021-12-25 | Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111604441.9A CN114075855A (en) | 2021-12-25 | 2021-12-25 | Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114075855A true CN114075855A (en) | 2022-02-22 |
Family
ID=80284358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111604441.9A Withdrawn CN114075855A (en) | 2021-12-25 | 2021-12-25 | Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114075855A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095066A (en) * | 2022-06-25 | 2022-09-23 | 长沙巨星轻质建材股份有限公司 | Assembled self-bearing prestress rib-shaped member |
-
2021
- 2021-12-25 CN CN202111604441.9A patent/CN114075855A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095066A (en) * | 2022-06-25 | 2022-09-23 | 长沙巨星轻质建材股份有限公司 | Assembled self-bearing prestress rib-shaped member |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220222 |