CN112360031A - Ribbed hollow floor system and box body capable of improving local pressure bearing performance of plate surface and construction method of ribbed hollow floor system and box body - Google Patents
Ribbed hollow floor system and box body capable of improving local pressure bearing performance of plate surface and construction method of ribbed hollow floor system and box body Download PDFInfo
- Publication number
- CN112360031A CN112360031A CN202011378795.1A CN202011378795A CN112360031A CN 112360031 A CN112360031 A CN 112360031A CN 202011378795 A CN202011378795 A CN 202011378795A CN 112360031 A CN112360031 A CN 112360031A
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- Prior art keywords
- floor
- plate
- box body
- hollow
- hollow floor
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- 238000010276 construction Methods 0.000 title claims abstract description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 15
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 3
- 230000003601 intercostal effect Effects 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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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
- E04B5/32—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
-
- 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
- E04B5/326—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/02—Material constitution of slabs, sheets or the like of ceramics, concrete or other stone-like material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/06—Material constitution of slabs, sheets or the like of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a ribbed hollow floor, a box body and a construction method thereof for improving the local pressure bearing performance of a plate surface, wherein the hollow floor comprises a floor upper plate, a floor lower plate and a plurality of box bodies arranged between the floor upper plate and the floor lower plate, and plate surface reinforcing steel bars and plate bottom reinforcing steel bars are respectively arranged in the floor upper plate and the floor lower plate; the box body is a thin-wall hollow square box, a plurality of through concave ribs are distributed on the upper surface of the box body, inter-rib reinforcing steel bars are arranged in the concave ribs, and an upper floor plate, a lower floor plate and adjacent square boxes are molded through concrete pouring, so that a plurality of parallel through plate top ribs are formed on the matched surface of the upper floor plate and the box body after the floor is poured, and the distance between the adjacent concave ribs is preferably smaller than the width of a truck tire. The hollow floor system can greatly improve the bearing capacity of the top plate in the box body area, and can reduce the strength requirement on the mold box.
Description
Technical Field
The invention relates to the field of hollow floors, in particular to a ribbed hollow floor, a box body and a construction method thereof, wherein the ribbed hollow floor and the box body are used for improving the local pressure bearing performance of a plate surface.
Background
With the continuous development of building technology, hollow floor systems are gradually and widely applied on the basis of conventional cast-in-place reinforced concrete ribbed floor systems and flat floor systems. As a novel floor system, the floor system is formed by pouring a certain number of permanent thin-wall box bodies regularly arranged in a cast-in-place concrete floor slab.
Because of the thin-wall box body, the hollow floor system has the advantages of small concrete consumption, light dead weight, shortened construction period, improved sound insulation effect, reduced structural cost and the like, and the economic and technical indexes are obviously improved compared with other types of floor system.
The size of the box body of the existing hollow floor is generally between 400 and 1000mm, and the commonly used box body is a thin-wall square box made of gypsum and plastic products. The hollow floor is safe as a common office floor and a household car parking garage, however, underground garages such as city commercial complexes, underground supermarkets and office buildings often have freight cars to come in and go out, and the existing hollow floor has great potential safety hazards. Underground garage floor load is 4kN/m2And the load of the driving area of the small truck is slightly large, the hollow floor slab is provided with upper and lower layers of steel bars at the bottom and the surface of the slab according to calculation, and the integral bending resistance of the floor slab can meet the use requirement. The common small-sized truck has the weight of 8t and the load of a single tire of 2.5t, and the uniform load of the single tire acting on the single box body area is more than 100kN/m in the parking or advancing process2Far exceeding the design load value, will make each district of hollow floor send outThe destruction was generated, and the destruction pattern was as shown in FIG. 1. The damage area is often not found because the damage area is positioned in the floor. There is a great safety risk that these local cracks continue to develop.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a ribbed hollow floor and a box body thereof, which can improve the local pressure bearing performance of the plate surface.
The purpose of the invention is realized by the following technical scheme:
the box body is a thin-wall hollow square box, and the upper surface of the box body is provided with a plurality of parallel through concave ribs.
Further, the concave ribs are distributed in an array.
Further, the distance between the connected concave ribs is 150-300 mm.
Further, the height h of the concave rib is calculated as follows:
wherein A issArranging the cross section area of the steel bar in the concave rib; h is1The thickness of the upper plate of the floor system; a is the thickness of the concrete protective layer of the steel bar in the concave rib; m is the maximum bending moment caused by the rear wheel in a single hollow floor, G is the weight borne by the rear wheel of the truck, l is the clear distance of the hollow floor, and fyThe design value of the tensile strength of the steel bar is obtained.
A ribbed hollow floor cover for improving the local pressure bearing performance of a plate surface comprises a floor upper plate, a floor lower plate and a plurality of box bodies;
the box body is arranged between the upper floor plate and the lower floor plate, and the upper floor plate and the lower floor plate are respectively provided with plate surface reinforcing steel bars and plate bottom reinforcing steel bars;
the reinforcement structure is characterized in that inter-rib reinforcements are arranged in the concave ribs of the box body, and the floor upper plate, the floor lower plate and the adjacent square boxes are molded by concrete pouring, so that after the floor is poured, a plurality of parallel through plate top ribs are formed on the matched surface of the floor upper plate and the box body, and the distance between the adjacent concave ribs is smaller than the width of a truck tire.
Furthermore, the top ribs of the upper plate of the floor system are distributed in an array.
Furthermore, the plate surface reinforcing steel bars and the plate bottom reinforcing steel bars of the adjacent box bodies are fixedly connected through tie bars.
Further, the distance between adjacent plate top ribs of the upper plate of the floor system is 150-300 mm.
The construction method of the hollow floor comprises the following steps:
(1) firstly, floor slab formwork supporting is carried out;
(2) laying floor slab bottom steel bars;
(3) placing a thin-wall hollow square box with concave ribs;
(4) laying the intercostal steel bars and the plate steel bars of the floor slab;
(5) and (5) pouring concrete.
The invention has the following beneficial effects:
compared with the common hollow floor, the hollow floor can eliminate the potential safety hazard of the existing hollow floor and greatly improve the bearing capacity of the top plate in the box body area. Because the plate ribs are arranged on the upper plate of the floor, the thickness of concrete at the top of the hollow floor plate can be reduced, the cost is even better, and the reinforcing steel bars arranged among the plate ribs can be used as a fixing frame for preventing the hollow mold box from floating upwards in the floor concrete pouring process. The concave ribs on the square box can also improve the rigidity of the box body in the construction and transportation process, and reduce damage.
Drawings
FIG. 1 is a schematic view of a conventional hollow floor slab undergoing a local collapse under a wheel pressure;
FIG. 2 is a schematic structural view of a box body for a hollow floor;
fig. 3 is a top view of the box body for hollow floor, and the concave rib can be unidirectional or bidirectional.
FIG. 4 is a top plan view of a ribbed hollow floor;
fig. 5 is a partial view of AA in fig. 4.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
As shown in fig. 2 and 3, the box body for the hollow floor system is a thin-wall hollow square box, and the upper surface of the box body is provided with a plurality of parallel through concave ribs.
In order to further improve the bearing performance of the upper plate of the floor cover and greatly improve the bearing capacity of the top plate of the box body area, the concave ribs are arranged into a plurality of ribs and distributed in an array.
In order to better bear the weight of the wagon wheels, the distance between the connected concave ribs is smaller than the width of the wagon wheels, and the distance is 150-300 mm.
As shown in FIG. 2, the width of the upper opening of the box body is 7cm, the width of the bottom is 5cm, and the depth is generally 3-5cm according to requirements. The spacing between the concave ribs is 150-300 mm. The box material can be glass fiber + slurry inorganic material, high-injection alloy or PPE.
The height h of the concave ribs is calculated as follows:
wherein A issArranging the cross section area of the steel bar in the concave rib; h is1The thickness of the upper plate of the floor system; a is the thickness of the concrete protective layer of the steel bar in the concave rib; m is the maximum bending moment caused by the rear wheel in a single hollow floor, G is the weight borne by the rear wheel of the truck,l is the clear distance of the hollow floor system, fyThe design value of the tensile strength of the steel bar is obtained.
As shown in fig. 4 and 5, the hollow floor with the hidden ribs for improving the local pressure bearing performance of the floor surface comprises an upper floor plate, a lower floor plate and thin-wall hollow square boxes arranged between the upper floor plate and the lower floor plate and shown in fig. 2, wherein the upper floor plate and the lower floor plate are respectively provided with a floor reinforcing steel bar and a floor reinforcing steel bar, and the upper floor plate, the lower floor plate and the adjacent thin-wall hollow square boxes are molded by concrete pouring; the plate surface reinforcing steel bars and the plate bottom reinforcing steel bars between the adjacent thin-wall hollow square boxes are also connected through tie bars.
The upper surface of the thin-wall hollow square box matched with the upper plate of the floor system is provided with a plurality of parallel through concave ribs, and reinforcing steel bars among the ribs are arranged in the concave ribs, so that after the floor system is poured, the lower surface of the upper plate of the floor system is integrally formed with a plurality of parallel through plate top ribs, and the width of the adjacent plate top ribs is smaller than the width of truck tires.
At present, the side length of the hollow floor is mostly 400-1000mm, the height of the box body is more than 150-500 mm, and the thickness of the upper floor plate and the lower floor plate is not less than 40mm and is mostly about 60-80 mm. Because the upper plate and the lower plate are only provided with single-layer steel bars in the middle, the bending resistance is very small, and the floor can only bear the load of a common floor. After the through concave ribs are arranged, the bottom of each concave rib is provided with the steel bar, and the local bearing capacity of the hollow floor can be greatly improved.
The construction method of the hollow floor system specifically comprises the following steps:
(1) firstly, floor slab formwork supporting is carried out;
(2) laying floor slab bottom steel bars;
(3) placing a thin-wall hollow square box with concave ribs;
(4) laying the intercostal steel bars and the plate steel bars of the floor slab;
(5) and (5) pouring concrete.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and although the invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes in the form and details of the embodiments may be made and equivalents may be substituted for elements thereof. All modifications, equivalents and the like which come within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The box body for the hollow floor is characterized in that the box body is a thin-wall hollow square box, and the upper surface of the box body is provided with a plurality of parallel through concave ribs.
2. The tank body for a hollow floor as claimed in claim 1, wherein the concave ribs are arranged in an array.
3. The box body for the hollow floor as claimed in claim 1, wherein the interval between the connected concave ribs is 150 to 300 mm.
4. The tank body for a hollow floor according to claim 1, wherein the height h of said concave rib is calculated as follows:
wherein A issArranging the cross section area of the steel bar in the concave rib; h is1The thickness of the upper plate of the floor system; a is the thickness of the concrete protective layer of the steel bar in the concave rib; m is the maximum bending moment caused by the rear wheel in a single hollow floor, G is the weight borne by the rear wheel of the truck, l is the clear distance of the hollow floor, and fyThe design value of the tensile strength of the steel bar is obtained.
5. A ribbed hollow floor slab for improving the local pressure bearing performance of the slab surface is characterized by comprising a floor slab upper plate, a floor slab lower plate and a plurality of box bodies according to claim 1;
the box body is arranged between the upper floor plate and the lower floor plate, and the upper floor plate and the lower floor plate are respectively internally provided with plate surface reinforcing steel bars and plate bottom reinforcing steel bars.
The reinforcement structure is characterized in that inter-rib reinforcements are arranged in the concave ribs of the box body, and the floor upper plate, the floor lower plate and the adjacent square boxes are molded by concrete pouring, so that after the floor is poured, a plurality of parallel through plate top ribs are formed on the matched surface of the floor upper plate and the box body, and the distance between the adjacent concave ribs is smaller than the width of a truck tire.
6. The hollow floor system with the rib for improving the local pressure bearing performance of the plate surface according to the claim 5, is characterized in that the top ribs of the upper plate of the floor system are distributed in an array.
7. The hollow floor with the rib for improving the local bearing capacity of the plate surface of the claim 5 is characterized in that the plate surface steel bars and the plate bottom steel bars of the adjacent box bodies are fixedly connected through the lacing wires.
8. The hollow floor with the rib for improving the plate surface local pressure bearing performance as claimed in claim 5, wherein the distance between the adjacent top ribs of the upper plate of the floor is 150-300 mm.
9. A construction method of a hollow floor according to claim 5, characterized in that the method comprises the following steps:
(1) firstly, floor slab formwork supporting is carried out;
(2) laying floor slab bottom steel bars;
(3) placing a thin-wall hollow square box with concave ribs;
(4) laying the intercostal steel bars and the plate steel bars of the floor slab;
(5) and (5) pouring concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378795.1A CN112360031B (en) | 2020-11-30 | 2020-11-30 | Ribbed hollow floor system and box body capable of improving local pressure bearing performance of plate surface and construction method of ribbed hollow floor system and box body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378795.1A CN112360031B (en) | 2020-11-30 | 2020-11-30 | Ribbed hollow floor system and box body capable of improving local pressure bearing performance of plate surface and construction method of ribbed hollow floor system and box body |
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| Publication Number | Publication Date |
|---|---|
| CN112360031A true CN112360031A (en) | 2021-02-12 |
| CN112360031B CN112360031B (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011378795.1A Active CN112360031B (en) | 2020-11-30 | 2020-11-30 | Ribbed hollow floor system and box body capable of improving local pressure bearing performance of plate surface and construction method of ribbed hollow floor system and box body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142605A (en) * | 2022-08-12 | 2022-10-04 | 陕西建工第十六建设有限公司 | Technological method for controlling parameters of core mold and rib plate reinforcing steel bars of cast-in-place concrete hollow floor |
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| KR20040043263A (en) * | 2002-11-18 | 2004-05-24 | 한국건설기술연구원 | Hollow Type I Beam Composite Deck having Transverse Joints and Constructing Method thereof |
| CN1641154A (en) * | 2004-01-06 | 2005-07-20 | 邱则有 | A composite reinforced concrete hollow floor slab |
| CN103469954A (en) * | 2013-10-12 | 2013-12-25 | 青岛豪森格瑞木业工程有限公司 | Hollow floor box, hollow floor plate column and processing method of hollow floor plate column |
| CN103806656A (en) * | 2012-11-06 | 2014-05-21 | 南通卓强建设工程有限公司 | Construction method of cast-in-place concrete flat slab built-in thin-wall hollow box body |
| CN205857487U (en) * | 2016-06-22 | 2017-01-04 | 江苏建筑职业技术学院 | A kind of combined reinforced bar concrete cassette ceiling |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN211341354U (en) * | 2019-08-25 | 2020-08-25 | 庄培煌 | A cast-in-place concrete lightweight brick-filled hollow floor |
-
2020
- 2020-11-30 CN CN202011378795.1A patent/CN112360031B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040043263A (en) * | 2002-11-18 | 2004-05-24 | 한국건설기술연구원 | Hollow Type I Beam Composite Deck having Transverse Joints and Constructing Method thereof |
| CN1641154A (en) * | 2004-01-06 | 2005-07-20 | 邱则有 | A composite reinforced concrete hollow floor slab |
| CN103806656A (en) * | 2012-11-06 | 2014-05-21 | 南通卓强建设工程有限公司 | Construction method of cast-in-place concrete flat slab built-in thin-wall hollow box body |
| CN103469954A (en) * | 2013-10-12 | 2013-12-25 | 青岛豪森格瑞木业工程有限公司 | Hollow floor box, hollow floor plate column and processing method of hollow floor plate column |
| CN205857487U (en) * | 2016-06-22 | 2017-01-04 | 江苏建筑职业技术学院 | A kind of combined reinforced bar concrete cassette ceiling |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN211341354U (en) * | 2019-08-25 | 2020-08-25 | 庄培煌 | A cast-in-place concrete lightweight brick-filled hollow floor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142605A (en) * | 2022-08-12 | 2022-10-04 | 陕西建工第十六建设有限公司 | Technological method for controlling parameters of core mold and rib plate reinforcing steel bars of cast-in-place concrete hollow floor |
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| Publication number | Publication date |
|---|---|
| CN112360031B (en) | 2023-01-13 |
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