CN114776070A - Reinforcing structure and method for large-span floor slab - Google Patents
Reinforcing structure and method for large-span floor slab Download PDFInfo
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- CN114776070A CN114776070A CN202210439713.2A CN202210439713A CN114776070A CN 114776070 A CN114776070 A CN 114776070A CN 202210439713 A CN202210439713 A CN 202210439713A CN 114776070 A CN114776070 A CN 114776070A
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- steel
- floor slab
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 102
- 239000010959 steel Substances 0.000 claims abstract description 102
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a reinforcing structure and a reinforcing method for a large-span floor slab, belongs to the field of floor slab reinforcement, and solves the problems of insufficient bearing capacity, cracking, overlarge deflection and the like of the large-span floor slab. The reinforcing structure comprises a plurality of steel units, wherein the steel units are arranged among original steel bars of a floor slab in parallel, and two ends of each steel unit are connected with a shear wall or a beam. The reinforcing method comprises the following steps: removing the load of the floor slab, supporting the bottom of the floor slab, and supporting the bottom of the subsidence area of the floor slab in an inverted arch manner; chiseling concrete in a settlement area of the floor slab, and reserving original steel bars of the floor slab; sequentially penetrating the steel sections through original steel bars of the floor slab and supporting the steel sections among the steel bars, connecting adjacent steel sections to form steel units, arranging a plurality of steel units in parallel in a settlement area of the floor slab, and connecting two ends of each steel unit with a shear wall or a beam to form a whole span support; and pouring high-strength concrete grade concrete in the chiseled area. The invention fully utilizes the original structure of the floor slab, has reasonable stress and does not increase the thickness of the original floor slab.
Description
Technical Field
The invention belongs to the field of floor slab reinforcement, and particularly relates to a reinforcing structure and method for a large-span floor slab.
Background
In recent years, with the improvement of economic living standard of people, the space of a living room or a public area in a newly built house is continuously enlarged, a large number of large-span floor slabs are generated, but the large-span floor slabs have the problems of insufficient bearing capacity, cracking, overlarge deflection and the like due to the design, construction quality and the like.
Disclosure of Invention
The invention aims to provide a reinforcing structure of a large-span floor slab, which solves the problems of insufficient bearing capacity, cracking, overlarge deflection and the like of the large-span floor slab.
Another object of the present invention is to provide a method for reinforcing a large-span floor slab.
The technical scheme of the invention is as follows: the utility model provides a reinforced structure of large-span floor, includes a plurality of strength steel units, and strength steel unit parallel arrangement is between the original reinforcing bar of floor, and the both ends of strength steel unit link to each other with shear force wall or roof beam.
As a further improvement of the invention, the steel beam unit is formed by connecting a plurality of steel beam sections in sequence.
As a further improvement of the invention, adjacent steel sections are connected through connecting steel plates, and the connecting steel plates are fixed on the steel sections through connecting bolts.
As a further improvement of the invention, the steel section adopts I-shaped steel.
As a further improvement of the invention, the steel units are connected with the shear walls or beams through end steel plates, the side parts of the end steel plates are welded with buried plates of the shear walls or beams, and the end steel plates are fixed on the steel units through high-strength bolts.
A method for reinforcing a large-span floor slab comprises the following specific steps:
firstly, unloading the load of a floor slab, supporting the bottom of the floor slab, and performing inverted arch support on the bottom of a settlement area of the floor slab;
chiseling concrete in a settlement area of the floor slab, and reserving original steel bars of the floor slab;
thirdly, sequentially penetrating the steel sections through original steel bars of the floor slab and supporting the steel sections among the steel bars, connecting the adjacent steel sections to form steel units, arranging a plurality of steel units in parallel in a settlement area of the floor slab, and connecting two ends of each steel unit with a shear wall or a beam to form a whole span support;
and step four, pouring high-strength concrete grade concrete in the chiseled area.
The beneficial effects of the invention are: the invention carries out reinforcement treatment in the settlement area of the existing building reinforced concrete floor slab, adopts the reinforced structure of the strong steel high-strength concrete, fully utilizes the original structure of the floor slab, has reasonable stress, does not increase the thickness of the original floor slab, and does not influence the original space. The method is simple and convenient to operate, saves materials, and is an environment-friendly reinforcement method.
Drawings
Fig. 1 is a schematic structural view of a reinforcing structure of a long-span floor slab according to the present invention;
FIG. 2 is a view A-A of FIG. 1;
fig. 3 is a top view of the connection relationship between the stiffness steel units and the shear walls or beams according to the present invention;
fig. 4 is a schematic view of the connection of adjacent sections of steel in the present invention.
In the figure: 1-strength steel unit; 2-reinforcing steel bars; 3, a floor slab; 4-strength steel section; 5-shear walls or beams; 6-connecting steel plates; 7-connecting bolts; 8-end steel plate; 9-embedding a plate; 10-high strength bolt.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a reinforcing structure of a large-span floor slab includes a plurality of steel units 1, the steel units 1 are arranged in parallel between original steel bars 2 of a floor slab 3, and both ends of the steel units 1 are connected to a shear wall or a beam 5.
The steel force unit 1 is formed by connecting a plurality of steel force sections 4 in sequence. Adjacent steel sections 4 are connected through connecting steel plates 6, and the connecting steel plates 6 are fixed on the steel sections 4 through connecting bolts 7.
The steel section 4 is made of I-shaped steel.
The steel strength unit 1 is connected with the shear wall or beam 5 through an end steel plate 8, the side part of the end steel plate 8 is welded with a buried plate 9 of the shear wall or beam 5, and the end steel plate 8 is fixed on the steel strength unit 1 through a high-strength bolt 10.
A method for reinforcing a large-span floor slab comprises the following specific steps:
firstly, removing the load of a floor slab 3, reliably supporting the bottom of the floor slab 3, and performing inverted arch support on the bottom of a settlement area of the floor slab 3;
chiseling concrete in a settlement area of the floor slab 3, and keeping the original steel bars 2 of the floor slab 3;
thirdly, sequentially penetrating the steel sections 4 through the original steel bars 2 of the floor slab 3 and supporting the steel sections between the steel bars 2, connecting the adjacent steel sections 4 to form steel units 1, arranging a plurality of steel units 1 in parallel in the settlement area of the floor slab 3, and connecting two ends of each steel unit 1 with a shear wall or beam 5 to form a whole span support;
and step four, pouring high-strength concrete (larger than C45) in the chiseled area, pouring low-strength concrete at the joint of the high-strength concrete and the original floor slab 3, and tamping to prevent the low-strength concrete from flowing into the high-strength concrete pouring part.
According to the invention, on the premise of not increasing the thickness of the original floor slab and not influencing the original space, the settlement area of the existing building reinforced concrete floor slab 3 is reinforced, the original structure of the floor slab 3 is fully utilized, after the concrete in the settlement area of the floor slab 3 is chiseled, a plurality of steel units 1 are supported between the original steel bars 2 of the floor slab 3, then the chiseled area is poured by high-strength concrete with concrete grade, the original appearance of the floor slab 3 is restored, the thickness of the floor slab 3 is not increased, and the space is not occupied. The end part of the steel unit 1 is connected with the shear wall or beam 5, and the bearing of the floor slab 3 is not increased. The steel strength unit 1 is formed by connecting a plurality of steel strength sections 4, and construction is facilitated.
Claims (6)
1. The utility model provides a reinforced structure of large-span floor which characterized in that: the floor slab comprises a plurality of strength steel units (1), wherein the strength steel units (1) are arranged between original steel bars (2) of a floor slab (3) in parallel, and two ends of each strength steel unit (1) are connected with a shear wall or a beam (5).
2. The reinforcing structure of a large-span floor slab as claimed in claim 1, wherein: the steel strength unit (1) is formed by sequentially connecting a plurality of steel strength sections (4).
3. The reinforcing structure of a large-span floor slab as claimed in claim 2, wherein: the adjacent steel sections (4) are connected through connecting steel plates (6), and the connecting steel plates (6) are fixed on the steel sections (4) through connecting bolts (7).
4. The reinforcing structure of a large-span floor slab as claimed in claim 3, wherein: the stiff steel section (4) is made of I-shaped steel.
5. The reinforcing structure of a large-span floor slab as claimed in any one of claims 1 to 4, wherein: the steel unit (1) is connected with the shear wall or beam (5) through the end steel plate (8), the side portion of the end steel plate (8) is welded with the embedded plate (9) of the shear wall or beam (5), and the end steel plate (8) is fixed on the steel unit (1) through the high-strength bolt (10).
6. A method for reinforcing a large-span floor slab is characterized by comprising the following steps: a reinforced structure of large span floor slab using any one of claims 2-5, comprising the following steps:
step one, the load of the floor slab (3) is unloaded, the bottom of the floor slab (3) is used as a support, and the bottom of a settlement area of the floor slab (3) is supported in an inverted arch manner;
chiseling concrete in a settlement area of the floor slab (3) and reserving the original steel bars (2) of the floor slab (3);
thirdly, sequentially penetrating the steel sections (4) through original steel bars (2) of the floor slab (3) and supporting the steel bars between the steel bars (2), connecting the adjacent steel sections (4) to form steel units (1), arranging a plurality of steel units (1) in parallel in a settlement area of the floor slab (3), and connecting two ends of each steel unit (1) with a shear wall or beam (5) to form a whole span support;
and step four, pouring high-strength concrete with a mixed grade in the chiseling-off area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439713.2A CN114776070A (en) | 2022-04-25 | 2022-04-25 | Reinforcing structure and method for large-span floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439713.2A CN114776070A (en) | 2022-04-25 | 2022-04-25 | Reinforcing structure and method for large-span floor slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114776070A true CN114776070A (en) | 2022-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210439713.2A Pending CN114776070A (en) | 2022-04-25 | 2022-04-25 | Reinforcing structure and method for large-span floor slab |
Country Status (1)
| Country | Link |
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| CN (1) | CN114776070A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3520129A1 (en) * | 1985-06-05 | 1986-12-11 | Stahlbau Michael Lavis Söhne, 6050 Offenbach | Composite steel cover |
| JP2002167977A (en) * | 2000-11-29 | 2002-06-11 | Kajima Corp | Lower surface thickness increasing and reinforcing method for reinforced concrete floor slab |
| CN201722945U (en) * | 2010-01-11 | 2011-01-26 | 贵阳铝镁设计研究院 | Reinforcing structure of building surface beam plate |
| JP2017119995A (en) * | 2015-12-28 | 2017-07-06 | スリーエム イノベイティブ プロパティズ カンパニー | Viscous article for concrete structure exfoliation prevention, and construction method therefor |
| CN107269023A (en) * | 2016-03-02 | 2017-10-20 | 叶香雄 | Floor reinforcement means |
| CN207934485U (en) * | 2018-01-19 | 2018-10-02 | 山西大学 | A kind of shear wall structure floor reinforcing connection structure |
| CN113006269A (en) * | 2021-03-05 | 2021-06-22 | 兰州有色冶金设计研究院有限公司 | Construction method of sandwich earth wall house structure system |
| CN113513000A (en) * | 2021-04-30 | 2021-10-19 | 兰州有色冶金设计研究院有限公司 | Reinforced structure and method for flood drainage culvert pipe in tailing pond |
| CN216042045U (en) * | 2021-10-11 | 2022-03-15 | 中国能源建设集团黑龙江省电力设计院有限公司 | Embedded steel reinforced concrete floor |
| CN216239881U (en) * | 2021-10-28 | 2022-04-08 | 中建五局第三建设有限公司 | Be used for concrete beam reinforced structure |
| CN217420637U (en) * | 2022-04-25 | 2022-09-13 | 兰州有色冶金设计研究院有限公司 | Reinforced structure of large-span floor |
-
2022
- 2022-04-25 CN CN202210439713.2A patent/CN114776070A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3520129A1 (en) * | 1985-06-05 | 1986-12-11 | Stahlbau Michael Lavis Söhne, 6050 Offenbach | Composite steel cover |
| JP2002167977A (en) * | 2000-11-29 | 2002-06-11 | Kajima Corp | Lower surface thickness increasing and reinforcing method for reinforced concrete floor slab |
| CN201722945U (en) * | 2010-01-11 | 2011-01-26 | 贵阳铝镁设计研究院 | Reinforcing structure of building surface beam plate |
| JP2017119995A (en) * | 2015-12-28 | 2017-07-06 | スリーエム イノベイティブ プロパティズ カンパニー | Viscous article for concrete structure exfoliation prevention, and construction method therefor |
| CN107269023A (en) * | 2016-03-02 | 2017-10-20 | 叶香雄 | Floor reinforcement means |
| CN207934485U (en) * | 2018-01-19 | 2018-10-02 | 山西大学 | A kind of shear wall structure floor reinforcing connection structure |
| CN113006269A (en) * | 2021-03-05 | 2021-06-22 | 兰州有色冶金设计研究院有限公司 | Construction method of sandwich earth wall house structure system |
| CN113513000A (en) * | 2021-04-30 | 2021-10-19 | 兰州有色冶金设计研究院有限公司 | Reinforced structure and method for flood drainage culvert pipe in tailing pond |
| CN216042045U (en) * | 2021-10-11 | 2022-03-15 | 中国能源建设集团黑龙江省电力设计院有限公司 | Embedded steel reinforced concrete floor |
| CN216239881U (en) * | 2021-10-28 | 2022-04-08 | 中建五局第三建设有限公司 | Be used for concrete beam reinforced structure |
| CN217420637U (en) * | 2022-04-25 | 2022-09-13 | 兰州有色冶金设计研究院有限公司 | Reinforced structure of large-span floor |
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