CN108678249B - Crack-resistant prestressed double-T plate - Google Patents
Crack-resistant prestressed double-T plate Download PDFInfo
- Publication number
- CN108678249B CN108678249B CN201810824025.1A CN201810824025A CN108678249B CN 108678249 B CN108678249 B CN 108678249B CN 201810824025 A CN201810824025 A CN 201810824025A CN 108678249 B CN108678249 B CN 108678249B
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- Prior art keywords
- horizontal
- top plate
- horizontal top
- reinforcing
- plate
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 43
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 30
- 230000008719 thickening Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 238000010008 shearing Methods 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
The invention discloses an anti-crack prestressed double-T plate, which comprises a horizontal top plate and two T-shaped plates, wherein the T-shaped plates are vertically arranged at the bottom of the horizontal top plate and are longitudinally and longitudinally arranged along the horizontal top plate; the two ends of the horizontal top plate are respectively end thickened sections, at least two groups of reinforcing steel bars are longitudinally arranged in the end thickened sections, and each group of reinforcing steel bars comprises horizontal reinforcing ribs and inclined reinforcing ribs which are positioned in the same vertical plane. The invention has the advantages that: the capacity of preventing the end parts of the double T plates from cracking is achieved by thickening the end parts of the horizontal top plates to improve the shearing resistance and the torsion resistance of the end parts; the shearing resistance and torsion resistance of the end part are further improved through reinforcing steel bars, and the influence of stress in the pouring process is reduced; simple structure, convenient processing and strong applicability.
Description
Technical Field
The invention belongs to the technical field of prefabricated parts, and particularly relates to a crack-resistant pre-stress double-T plate.
Background
Because the needs of prefabricated factory building, office building and bridge structure, the span and the width of current two T boards increase to make the weight of two T boards constantly increase, influence the in-service use. For weight reduction purposes, the top plate of the double-T plate is typically of thin-walled construction. In actual use, cracks are easy to generate on the double T-shaped plate with the thin-wall structure, part of cracks are formed due to temperature stress in the pouring process, and meanwhile, the thin-wall top plate is subjected to uneven torsion force and concentrated force in the hoisting and transporting processes, and penetrating cracks can occur at the end parts of the thin-wall top plate, so that the use safety and durability of the double T-shaped plate are affected.
Therefore, there is a need for an improvement in the structure of the double T-plate to overcome the above problem of easy crack generation.
Disclosure of Invention
According to the defects of the prior art, the invention provides the crack-resistant pre-stress double-T plate which is applied to precast plant floors, large-span office buildings and precast bridge structures, and the double-T plate is provided with reinforcing steel bars by thickening the thickness of the end parts, so that the problem that the thin-wall roof structure is easy to crack is solved while the weight of the double-T plate is not increased.
The invention is realized by the following technical scheme:
The crack-resistant prestress double-T plate is characterized by comprising a horizontal top plate and two T-shaped plates, wherein the T-shaped plates are vertically arranged at the bottom of the horizontal top plate and are longitudinally and longitudinally arranged along the horizontal top plate; the two ends of the horizontal top plate are respectively end thickened sections, at least two groups of reinforcing steel bars are longitudinally arranged in the end thickened sections, and each group of reinforcing steel bars comprises horizontal reinforcing ribs and inclined reinforcing ribs which are positioned in the same vertical plane.
The horizontal top plate and the T-shaped plate are of an integrated structure.
And a horizontal reinforcing steel bar net is longitudinally arranged in the horizontal top plate, and a vertical reinforcing steel bar net is arranged in the T-shaped plate.
The inclined reinforcing ribs are arranged at the connecting corners of the T-shaped plates and the horizontal top plates in an inclined mode, the lower ends of the inclined reinforcing ribs are connected with the vertical reinforcing steel bar meshes, and the upper ends of the inclined reinforcing ribs are connected with the horizontal reinforcing steel bar meshes and the horizontal reinforcing ribs.
The upper ends of the inclined reinforcing ribs point to the central line direction of the horizontal top plate.
The horizontal reinforcement ribs comprise an upper horizontal reinforcement rib and a lower horizontal reinforcement rib, and the upper horizontal reinforcement rib and the lower horizontal reinforcement rib are respectively arranged above and below the horizontal reinforcement mesh.
And a plurality of hoisting embedded parts are symmetrically arranged on the upper surface of the horizontal top plate.
The upper surface of horizontal roof is the horizontality, the thickness of tip thickening section is linear thickening, the tip thickening section is close to the one side of the tip of horizontal roof is the biggest department of thickening.
The invention has the advantages that: the capacity of preventing the end parts of the double T plates from cracking is achieved by thickening the end parts of the horizontal top plates to improve the shearing resistance and the torsion resistance of the end parts; the shearing resistance and torsion resistance of the end part are further improved through reinforcing steel bars, and the influence of stress in the pouring process is reduced; simple structure, convenient processing and strong applicability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a crack-resistant pre-stressed double-T panel according to an embodiment of the invention;
FIG. 2 is a side view of a crack-resistant pre-stressed dual T-plate according to an embodiment of the invention;
FIG. 3 is a partial cross-sectional view of an end portion of a crack-resistant pre-stressed double-T panel in accordance with an embodiment of the invention;
fig. 4 is a partial perspective view of an end portion of a crack-resistant pre-stressed double-T-plate in accordance with an embodiment of the invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings, to facilitate understanding by those skilled in the art:
As shown in fig. 1-4, reference numerals 1-10 are respectively: double T board 1, horizontal roof 2, T template 3, tip thickening 4, horizontal reinforcement 5, vertical reinforcing bar net 6, oblique reinforcement 7, horizontal reinforcing bar net 8, prestressing tendons 9, hoist and mount built-in fitting 10.
Examples: as shown in fig. 1-4, the present embodiment relates to an anti-crack prestressed double-T-plate 1, which thickens the end and sets reinforcing steel bars, and solves the problem that the thin-wall top plate structure is easy to crack while the weight of the double-T-plate 1 is not increased.
As shown in fig. 1-4, an anti-crack type prestress double-T plate 1 comprises a horizontal top plate 2 and two T-shaped plates 3, wherein the T-shaped plates 3 are vertically and symmetrically arranged at the bottom of the horizontal top plate 2, and the T-shaped plates 3 are longitudinally and uniformly arranged along the horizontal top plate to form a pi-shaped structure. The two ends of the horizontal top plate 2 are provided with thickened end thickened sections 4, and reinforcing steel bars are arranged in the end thickened sections 4 and the T-shaped plates 3. The upper surface of the horizontal top plate 2 is horizontal, the thickness of the end thickened section 4 is linearly thickened, one side of the end thickened section 4, which is close to the end of the horizontal top plate 2, is the thickest part, and the area of the horizontal top plate 2 outside the end thickened section 4 can adopt a thin-wall structure. The length of the two T-shaped plates 3 is the same as that of the horizontal top plate 2, and the setting direction is parallel to the side edges of the T-shaped plates 3. The horizontal top plate 2 and the T-shaped plate 3 form an integrated structure through concrete pouring. The upper surface of the horizontal top plate 2 is symmetrically provided with a plurality of hoisting embedded parts 10, and mechanical equipment realizes the transportation and moving operation of the double-T plate 1 by connecting the hoisting embedded parts 10. The thickness of the end thickened section 4 is determined by the length of the double T-plate 1. The end thickening section 4 is thickened gradually from the inner side of the horizontal top plate 2 to the thickest edge in a linear thickening mode, so that the weight of a part of the end thickening section can be reduced while the stress resistance of the end part is realized, and meanwhile, the crack can be prevented by the mechanical structure with smaller variation amplitude. The horizontal top plate 2 is provided with the end thickening sections 4 at the two ends, so that the thickness of the two ends is increased, and the influence of temperature stress can be effectively overcome in the pouring process.
As shown in fig. 1 to 4, a horizontal reinforcing mesh 8,T is disposed in the horizontal top plate 2 along the longitudinal direction thereof, and a vertical reinforcing mesh 6 is disposed in the form 3. Two groups of reinforcing steel bars are longitudinally arranged in each end thickened section 4, and each group of reinforcing steel bars comprises a horizontal reinforcing steel bar 5 and an inclined reinforcing steel bar 7 which are positioned in the same vertical plane.
The inclined reinforcing ribs 7 are arranged at the connecting corners of the T-shaped plates 3 and the horizontal top plate 2 in an inclined mode, the lower ends of the inclined reinforcing ribs 7 are connected with the vertical reinforcing steel bar meshes 6, and the upper ends of the inclined reinforcing ribs 7 are connected with the horizontal reinforcing steel bar meshes 8 and the horizontal reinforcing ribs 5. The upper ends of the inclined reinforcing ribs 7 are directed in the direction of the central line of the horizontal top plate 2. The horizontal reinforcing ribs 5 comprise an upper horizontal reinforcing rib 5 and a lower horizontal reinforcing rib 5, and the upper horizontal reinforcing rib 5 and the lower horizontal reinforcing rib 5 are respectively arranged above and below the horizontal reinforcing mesh 8. The horizontal reinforcing bars 5 are not limited to two, and should be increased according to the thickness of the actual double-T plate 1.
The horizontal reinforcing steel bar net 8 and the vertical reinforcing steel bar net 6 are main body frameworks forming the double-T plate 1, support the whole structure of the double-T plate 1, and further provide additional auxiliary force through the inclined reinforcing ribs 7 and the horizontal reinforcing ribs 5 to overcome the problems of end cracks between the T-shaped plate 3 and the horizontal top plate 2 and cracks in the middle of the horizontal top plate 2 due to uneven stress in the hoisting transportation process and the pouring process. The lower part of the T-shaped plate 3 is provided with a prestressed rib 9, and the structure of the T-shaped plate 3 is prestressed, so that the bearing capacity of the double T-shaped plates 1 is improved. The horizontal reinforcement ribs 5 reinforce the end thickened section 4 of the horizontal top plate 2, improve the shearing resistance and torsion resistance of the end, avoid the influence of stress on the end thickened section 4, and reduce the possibility of cracks generated in the middle of the horizontal top plate 2. The oblique reinforcement ribs 7 are used for sequentially connecting the horizontal reinforcement ribs 5, the vertical reinforcement mesh 6 and the horizontal reinforcement mesh 8, so that the influence of the tearing effect caused by stress in the pouring and transporting processes on the double-T plate 1 is avoided, and the possibility of cracks generated at the end part of the double-T plate 1 is reduced. The inclination angle of the inclined reinforcing ribs 7 is controlled to be between 30 and 50 degrees, and is suitable for adopting an inclination angle of 40 degrees, so that the inclined reinforcing ribs have good stability. The length of the oblique reinforcement ribs 7 is related to the thickness of the end thickened section 4 and also to the angle of inclination of the end thickened section 4 to the horizontal top plate 2. The diameter of each of the reinforcement bars involved is related to the thickness of the end thickened section 4 described above, with the diameter of the bars generally increasing the greater the thickness. The horizontal reinforcing steel bar net 8, the vertical reinforcing steel bar net 6, the inclined reinforcing ribs 7 and the horizontal reinforcing ribs 5 are connected through steel wire binding.
The advantages of this embodiment are: the end part of the horizontal top plate 2 is thickened to improve the shearing resistance and torsion resistance of the end part, so that the end part of the double-T plate 1 is prevented from cracking; the shearing resistance and torsion resistance of the end part are further improved through reinforcing steel bars, and the influence of stress in the pouring process is reduced; simple structure, convenient processing and strong applicability.
Claims (3)
1. The crack-resistant prestress double-T plate is characterized by comprising a horizontal top plate and two T-shaped plates, wherein the T-shaped plates are vertically arranged at the bottom of the horizontal top plate and are longitudinally and longitudinally arranged along the horizontal top plate; the two ends of the horizontal top plate are respectively end thickened sections, at least two groups of reinforcing steel bars are longitudinally arranged in the end thickened sections, and each group of reinforcing steel bars comprises horizontal reinforcing ribs and inclined reinforcing ribs which are positioned in the same vertical plane;
A horizontal reinforcing steel bar net is longitudinally arranged in the horizontal top plate, and a vertical reinforcing steel bar net is arranged in the T-shaped plate;
The inclined reinforcing ribs are arranged at the connecting corners of the T-shaped plates and the horizontal top plate in an inclined mode, the lower ends of the inclined reinforcing ribs are connected with the vertical reinforcing steel bar meshes, and the upper ends of the inclined reinforcing ribs are connected with the horizontal reinforcing steel bar meshes;
the upper ends of the inclined reinforcing ribs point to the central line direction of the horizontal top plate;
The horizontal reinforcing ribs comprise an upper horizontal reinforcing rib and a lower horizontal reinforcing rib, and the upper horizontal reinforcing rib and the lower horizontal reinforcing rib are respectively arranged above and below the horizontal reinforcing mesh;
The upper surface of horizontal roof is the horizontality, the thickness of tip thickening section is linear thickening, the tip thickening section is close to the one side of the tip of horizontal roof is the biggest department of thickening.
2. The crack resistant pre-stressed dual-T-panel of claim 1, wherein said horizontal top panel is integrally formed with said T-panel.
3. The crack-resistant pre-stressed double-T panel of claim 1, wherein a plurality of lifting embedments are symmetrically disposed on the upper surface of the horizontal top panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824025.1A CN108678249B (en) | 2018-07-25 | 2018-07-25 | Crack-resistant prestressed double-T plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824025.1A CN108678249B (en) | 2018-07-25 | 2018-07-25 | Crack-resistant prestressed double-T plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678249A CN108678249A (en) | 2018-10-19 |
| CN108678249B true CN108678249B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810824025.1A Active CN108678249B (en) | 2018-07-25 | 2018-07-25 | Crack-resistant prestressed double-T plate |
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| Country | Link |
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| CN (1) | CN108678249B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914663A (en) * | 2019-02-22 | 2019-06-21 | 深汕特别合作区盛腾科技工业园有限公司 | A kind of precast prestressed T plate of flooring |
| CN109723184A (en) * | 2019-02-25 | 2019-05-07 | 上海城建建设实业(集团)有限公司 | Fragment integrated form T plate structure |
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| JPH07331783A (en) * | 1994-06-07 | 1995-12-19 | Sumitomo Constr Co Ltd | Prestressed concrete slab for composite floor board |
| JPH1072905A (en) * | 1996-08-29 | 1998-03-17 | Runesu Kenkyusho:Kk | Joint part reinforcing structure between beam and floor slab regarding reversed beam double floor structure |
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| CN101220620A (en) * | 2006-12-08 | 2008-07-16 | 邱则有 | Reiteration plate |
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| CN105888135A (en) * | 2016-06-02 | 2016-08-24 | 贵州大学 | Novel steel-concrete combined open web girder and manufacturing method thereof |
| CN106245512A (en) * | 2016-08-04 | 2016-12-21 | 浙江工业大学 | Steel rubber concrete fastener type combined box beam |
| CN106639138A (en) * | 2016-12-29 | 2017-05-10 | 湖南诚友绿色建材科技有限公司 | Self-insulation prestressed concrete double-T laminated slab |
| CN206428808U (en) * | 2017-02-04 | 2017-08-22 | 嘉兴华泰特种混凝土制品有限公司 | A kind of strong concrete T plate |
| CN206428821U (en) * | 2017-02-04 | 2017-08-22 | 嘉兴华泰特种混凝土制品有限公司 | A kind of strong antidetonation large span prestressed concrete T plate |
| CN208685884U (en) * | 2018-07-25 | 2019-04-02 | 上海城建市政工程（集团）有限公司 | A kind of anti-slit formation prestressing force T plate |
-
2018
- 2018-07-25 CN CN201810824025.1A patent/CN108678249B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07331783A (en) * | 1994-06-07 | 1995-12-19 | Sumitomo Constr Co Ltd | Prestressed concrete slab for composite floor board |
| JPH1072905A (en) * | 1996-08-29 | 1998-03-17 | Runesu Kenkyusho:Kk | Joint part reinforcing structure between beam and floor slab regarding reversed beam double floor structure |
| CN2386106Y (en) * | 1999-09-29 | 2000-07-05 | 王安明 | Large precase slab |
| KR200341053Y1 (en) * | 2003-04-02 | 2004-02-11 | 주식회사 스틸코리아 | Prestressed composite double-T girder bridge |
| CN101220620A (en) * | 2006-12-08 | 2008-07-16 | 邱则有 | Reiteration plate |
| CN202831383U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | U-shaped prestressing force precast beam and machining mould |
| KR20140070267A (en) * | 2012-11-30 | 2014-06-10 | 한국건설기술연구원 | Precast concrete slab having horizontal shear connecting member of solid body type, and method for the same |
| CN204126053U (en) * | 2014-07-16 | 2015-01-28 | 宁夏大诚新型建筑材料有限公司 | Large span prestressed concrete T plate |
| CN104404864A (en) * | 2014-11-23 | 2015-03-11 | 天津玉祥成建筑构件有限公司 | Steel bar inner core double T-shaped plate |
| CN204530997U (en) * | 2015-01-30 | 2015-08-05 | 柳忠东 | A kind of concrete frame structure system |
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| CN105839858A (en) * | 2016-06-08 | 2016-08-10 | 南通鑫华混凝土制品有限公司 | Dry spliced auto-waterproof dual-T plate |
| CN106245512A (en) * | 2016-08-04 | 2016-12-21 | 浙江工业大学 | Steel rubber concrete fastener type combined box beam |
| CN106639138A (en) * | 2016-12-29 | 2017-05-10 | 湖南诚友绿色建材科技有限公司 | Self-insulation prestressed concrete double-T laminated slab |
| CN206428808U (en) * | 2017-02-04 | 2017-08-22 | 嘉兴华泰特种混凝土制品有限公司 | A kind of strong concrete T plate |
| CN206428821U (en) * | 2017-02-04 | 2017-08-22 | 嘉兴华泰特种混凝土制品有限公司 | A kind of strong antidetonation large span prestressed concrete T plate |
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