CN111561093A - Prestressed hollow floor slab and construction method thereof - Google Patents
Prestressed hollow floor slab and construction method thereof Download PDFInfo
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- CN111561093A CN111561093A CN202010401502.0A CN202010401502A CN111561093A CN 111561093 A CN111561093 A CN 111561093A CN 202010401502 A CN202010401502 A CN 202010401502A CN 111561093 A CN111561093 A CN 111561093A
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- floor slab
- prestressed hollow
- hollow floor
- construction
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims description 6
- 210000002435 tendon Anatomy 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract 1
- 210000003205 muscle Anatomy 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- 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
- E04B5/023—Separate connecting devices for prefabricated floor-slabs
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a prestressed hollow floor slab and a construction method thereof, and relates to the technical field of precast floor slabs, and the prestressed hollow floor slab comprises a slab body, wherein longitudinal ribs and transverse ribs are arranged in the slab body; a construction method of a prestressed hollow floor slab comprises the following steps of firstly, hoisting the floor slab; secondly, arranging the floor slabs to enable the side faces to be spliced; step three, placing a prefabricated reinforcing steel bar frame; step four, connecting the transverse ribs of the transverse rib grooves with the prefabricated steel rib frame; step five, pouring concrete in the V-shaped groove; sixthly, solidifying and molding the concrete; the prestressed hollow floor slab has the advantages that the splicing position of the floor slab is not easy to crack, the crack resistance is high, the integrity is good, the corners are not easy to damage and unfilled corners, the actual production, hoisting and transportation are very convenient, and the technical problem that the cracking and the convenient production and transportation cannot be simultaneously achieved in the conventional prefabricated floor slab construction is solved.
Description
Technical Field
The invention relates to the technical field of precast floor slabs, in particular to a prestressed hollow floor slab and a construction method thereof.
Background
The hollow prefabricated component board of reinforced concrete that now commonly used is rectangular shape, and the centre is opened has the through-hole, and this kind of hollow prefabricated component board has advantages such as the cost is low, convenient construction, preparation are easy, when assembling the floor, shelves hollow prefabricated component board on wall or roof beam earlier, then hangs mould at adjacent prefabricated component board concatenation department and pours the seam with concrete, forms hollow floor, but this kind of hollow prefabricated component board assembles the floor and has not enoughly: the hanging mould at the splicing position of the adjacent prefabricated component plates is grouted by concrete, the splicing position is easy to crack and poor in crack resistance, and the seam position is easy to leak; the connection force between the adjacent prefabricated component plates is weak, the integrity of the assembled floor slab is poor, after long-time exploration and improvement, the bottoms of the two sides of the slab body are provided with lower convex blocks which are tightly leaned to play a role of a template, concrete can be directly poured in the groove-shaped cavity, and a mould is not required to be hung at the splicing position; the design improvement well solves the problems of easy cracking, poor crack resistance, poor integrity and the like at the splicing part. However, the practical production, hoisting and transportation of the structure bring great inconvenience, the damage rate of the corner convex blocks is high, the production cost cannot be effectively controlled, the effective popularization is not achieved, and the splicing problem of the rectangular prefabricated member floor slab at the present stage is still a main technical difficulty.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a prestressed hollow floor slab and a construction method thereof.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the utility model provides a hollow floor of prestressing force, includes the plate body, is equipped with in the plate body and indulges muscle and horizontal muscle, and the plate body still includes horizontal muscle recess, and horizontal muscle penetrates horizontal muscle recess plate body both sides and is equipped with the inclined plane.
On the basis of the technical scheme, the length of the transverse rib does not exceed the inclined plane, and the plate body is provided with at least one longitudinal through hole.
On the basis of the technical scheme, the two ends of the transverse rib penetrate into the transverse rib grooves and are matched with the transverse rib grooves in size.
On the basis of the technical scheme, the transverse rib grooves are distributed on two sides of the plate body in pairs, and one transverse rib corresponds to two transverse rib grooves.
On the basis of the technical scheme, the cross section of the plate body is in an isosceles trapezoid shape.
On the basis of the technical scheme, the inclined planes on the two sides of the plate body are symmetrical to each other.
On the basis of the technical scheme, the construction method of the prestressed hollow floor slab comprises the following steps:
firstly, hoisting a prestressed hollow floor slab;
orderly arranging the prestressed hollow floor slabs in sequence to enable the inclined planes to be spliced into a V-shaped groove;
step three, placing a prefabricated reinforcing steel bar frame;
welding or hinging or bolt connecting or tenon-and-mortise connecting the transverse bars of the transverse bar grooves and the corresponding positions of the prefabricated reinforcing steel bar frames;
step five, pouring concrete in the V-shaped groove;
and step six, completing the construction operation of the floor slab after the concrete is solidified and formed.
On the basis of the technical scheme, the prefabricated reinforcing steel bar frame is in a hollow triangular prism shape.
On the basis of the technical scheme, any one of three edge included angles of the prefabricated reinforcing steel bar frame is matched with an open space enclosed by inclined planes at the splicing part of two adjacent prestressed hollow floor slabs.
On the basis of the technical scheme, the production method of the prestressed hollow floor slab is characterized by comprising the following steps of:
preparing a construction site, placing construction equipment, and determining a positioning reference;
secondly, tensioning the prestressed tendons, and performing forming extrusion construction;
checking the integral strength of the floor slab, and entering the next construction when the floor slab reaches the preset strength;
step four, performing superposition production, namely inverting the forming die to enable the bottom of the floor slab to be upward and the top of the floor slab to be attached to the finished top of the floor slab, and erecting a side supporting template;
tensioning the prestressed tendons, performing forming extrusion construction,
step six, checking the integral strength of the floor slab, and removing the side supporting template when the floor slab reaches the preset strength;
and step seven, repeating the step two to the step six in sequence until all production is finished.
Compared with the prior art, the invention has the advantages that:
(1) compared with the prior art, the prestressed hollow floor slab has the advantages that the splicing position of the floor slab is not easy to crack, the crack resistance is strong, the integrity is good, the corners are not easy to damage and lack corners, the actual production, hoisting and transportation are very convenient, and the technical problem that the cracking and the convenient production and transportation cannot be simultaneously achieved in the existing prefabricated floor slab construction is solved.
(2) The prestressed hollow floor slab has high hollow rate, the transverse rib grooves improve the integral hollow rate on the basis of ensuring the structural strength, the self weight is reduced, and the transportation cost is reduced.
(3) The construction process of the prestressed hollow floor slab disclosed by the invention utilizes an inclined plane and a prefabricated steel bar frame cast-in-place treatment technology, wherein the prefabricated steel bar frame can increase the cast-in-place strength between the slabs and is also connected with the transverse bars into a whole through welding or other rigid connections, so that the construction floor slab has better integrity.
(4) The prefabricated reinforcing steel bar frame in the construction of the prestressed hollow floor slab can be used as a pipeline preformed hole, and the pipeline can be conveniently arranged on the floor slab by utilizing the characteristics of a construction structure.
(5) The prestressed hollow floor slab can realize superimposed production, obviously reduces the requirement of production field, saves a large amount of land cost, has quick production period, can continue to use the traditional floor slab production process, and is mature and reliable.
Drawings
FIG. 1 is a schematic structural view of a prestressed hollow floor slab according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a prestressed hollow floor slab according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a section of prestressed hollow floor slab installation construction in an embodiment of the present invention.
In the figure: 1-plate body, 2-longitudinal bar, 3-transverse bar, 4-transverse bar groove, 5-inclined plane and 6-prefabricated reinforcing bar frame.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the invention provides a prestressed hollow floor slab, which includes a slab body 1, wherein longitudinal ribs 2 and transverse ribs 3 are arranged in the slab body 1, the slab body 1 further includes transverse rib grooves 4, the transverse ribs 3 penetrate through the transverse rib grooves 4 and are matched with the transverse rib grooves 4, inclined planes 5 are arranged on two sides of the slab body 1, and the length of the transverse ribs 3 does not exceed the inclined planes 5. The length of the transverse bar 3 is very critical, the transverse bar does not exceed the inclined plane 5, the factory construction can be greatly facilitated, particularly, the longitudinal linear production of the floor slab is greatly facilitated in the mechanical construction process, and the automatic production mechanical die with huge transformation cost is not required to be researched and designed again.
The plate body 1 is provided with at least one longitudinal through hole, so that the hollow rate is increased in a place where stress is not concentrated, and the dead weight of the plate body 1 is reduced. In the embodiment, the longitudinal through holes are uniformly arranged in the plate body 1, and relevant specifications are determined according to technical specifications.
The inclined plane 5 and the bottom surface of the plate body 1 form an included angle of not more than 80 degrees. The included angle between the inclined surface 5 and the bottom surface of the plate body 1 is determined by considering stress, transportation and hoisting in practical production and use experience, and the most reasonable design size can be determined according to practical construction requirements. The inclined surface 5 plays a role of a template in the construction process, and the template does not need to be additionally hoisted in the next cast-in-place construction. For the convenience and standardization of production, the cross section of the plate body 1 is isosceles trapezoid, so that the design of a production die is suitable, and the plate body has an attractive appearance. In this embodiment, the inclined plane 5 forms an included angle of 45 degrees with the bottom surface of the plate body 1. The inclined planes 5 on the two sides of the plate body 1 are mutually symmetrical, so that splicing is facilitated, and random combination construction and supplement of products are realized.
A construction method of a prestressed hollow floor slab comprises the following steps:
firstly, hoisting a prestressed hollow floor slab;
step two, orderly arranging the prestressed hollow floor slabs in sequence to enable the inclined planes 5 to be spliced into a V-shaped groove; if a large gap appears in the V-shaped groove, the V-shaped groove is filled in time to prepare for subsequent cast-in-place construction;
placing the prefabricated steel bar frames 6, and reasonably placing the prefabricated steel bar frames 6;
welding or hinging or bolt connecting or mortise and tenon connecting the transverse ribs 3 of the transverse rib grooves 4 and the prefabricated steel bar frames 6 at corresponding positions; the transverse bar 3 and the prefabricated steel bar frame 6 form a rigid whole, so that the structural integrity is improved;
step five, pouring concrete in the V-shaped groove;
and step six, completing the construction operation of the floor slab after the concrete is solidified and formed.
In particular, in order to better enable the reasonable structure and the convenient construction, the outline of the prefabricated reinforcement frame 6 is triangular prism. Any one of three edge included angles of the prefabricated steel bar frame 6 is matched with an open space enclosed by the inclined planes 5 at the splicing positions of the two adjacent prestressed hollow floor slabs. Not only be convenient for like this cast-in-place construction operation, can also effectively utilize prefabricated steel bar frame 6 to get inner space, prefabricated steel bar frame 6 uses as pipeline preformed hole for hollow triangular prism form, needn't trompil separately again, make full use of structure space.
A production method of a prestressed hollow floor slab comprises the following steps:
preparing a construction site, placing construction equipment, and determining a positioning reference;
secondly, tensioning the prestressed tendons, and performing forming extrusion construction;
checking the integral strength of the floor slab, and entering the next construction when the floor slab reaches the preset strength;
step four, performing superposition production, namely inverting the forming die to enable the bottom of the floor slab to be upward and the top of the floor slab to be attached to the finished top of the floor slab, and erecting a side supporting template;
tensioning the prestressed tendons, performing forming extrusion construction,
step six, checking the integral strength of the floor slab, and removing the side supporting template when the floor slab reaches the preset strength;
and step seven, repeating the step two to the step six in sequence until all production is finished.
Compared with the prior art, the prestressed hollow floor slab has the advantages that the splicing position of the floor slab is not easy to crack, the crack resistance is strong, the integrity is good, the corners are not easy to damage and lack corners, the actual production, hoisting and transportation are very convenient, and the technical problem that the cracking and the convenient production and transportation cannot be simultaneously achieved in the existing prefabricated floor slab construction is solved.
The prestressed hollow floor slab has high hollow rate, the transverse rib grooves improve the integral hollow rate on the basis of ensuring the structural strength, the self weight is reduced, and the transportation cost is reduced.
The construction process of the prestressed hollow floor slab disclosed by the invention utilizes an inclined plane and prefabricated steel bar frame cast-in-place treatment technology, wherein the prefabricated steel bar frame can increase the cast-in-place strength between the slabs and is connected with the transverse bars into a whole through welding or other rigid connections, so that the construction floor slab has better integrity.
The prefabricated reinforcing steel bar frame in the construction of the prestressed hollow floor slab can be used as a pipeline preformed hole, and the pipeline can be conveniently arranged on the floor slab by utilizing the characteristics of a construction structure. The prestressed hollow floor slab can realize superimposed production, obviously reduces the requirement of production field, saves a large amount of land cost, has quick production period, can continue to use the traditional floor slab production process, and is mature and reliable.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A prestressed hollow floor slab, characterized in that: the novel plate comprises a plate body (1), wherein longitudinal ribs (2) and transverse ribs (3) are arranged in the plate body (1), the plate body (1) further comprises transverse rib grooves (4), the transverse ribs (3) penetrate into the transverse rib grooves (4), and inclined planes (5) are arranged on two sides of the plate body (1).
2. A prestressed hollow floor slab as claimed in claim 1, wherein: the length of the transverse rib (3) does not exceed the inclined plane (5), and the plate body (1) is provided with at least one longitudinal through hole.
3. A prestressed hollow floor slab as claimed in claim 1, wherein: the two ends of the transverse bar (3) penetrate into the transverse bar grooves (4) and are matched with the transverse bar grooves (4) in size.
4. A prestressed hollow floor slab as claimed in claim 1, wherein: the transverse rib grooves (4) are arranged on two sides of the plate body (1) in pairs, and one transverse rib (3) corresponds to two transverse rib grooves (4).
5. A prestressed hollow floor slab as claimed in claim 1, wherein: the cross section of the plate body (1) is isosceles trapezoid.
6. A prestressed hollow floor slab as claimed in claim 1, wherein: the inclined planes (5) on the two sides of the plate body (1) are mutually symmetrical.
7. A construction method of a prestressed hollow floor slab is characterized by comprising the following steps:
firstly, hoisting a prestressed hollow floor slab;
orderly arranging the prestressed hollow floor slabs in sequence to enable the inclined planes (5) to be spliced into a V-shaped groove;
step three, placing a prefabricated reinforcing steel bar frame (6);
welding or hinging or bolt connecting or tenon-and-mortise connecting the transverse bars (3) of the transverse bar grooves (4) and the corresponding positions of the prefabricated reinforcing steel bar frames (6);
step five, pouring concrete in the V-shaped groove;
and step six, completing the construction operation of the floor slab after the concrete is solidified and formed.
8. The construction method of a prestressed hollow floor slab as claimed in claim 6, wherein: the prefabricated reinforcing steel bar frame (6) is in a hollow triangular prism shape.
9. The construction method of a prestressed hollow floor slab as claimed in claim 6, wherein: any one of three edge included angles of the prefabricated steel bar frame (6) is matched with an open space enclosed by the inclined planes (5) at the splicing positions of the two adjacent prestressed hollow floor slabs.
10. A production method of a prestressed hollow floor slab is characterized by comprising the following steps:
preparing a construction site, placing construction equipment, and determining a positioning reference;
secondly, tensioning the prestressed tendons, and performing forming extrusion construction;
checking the integral strength of the floor slab, and entering the next construction when the floor slab reaches the preset strength;
step four, performing superposition production, namely inverting the forming die to enable the bottom of the floor slab to be upward and the top of the floor slab to be attached to the finished top of the floor slab, and erecting a side supporting template;
tensioning the prestressed tendons, performing forming extrusion construction,
step six, checking the integral strength of the floor slab, and removing the side supporting template when the floor slab reaches the preset strength;
and step seven, repeating the step two to the step six in sequence until all production is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010401502.0A CN111561093A (en) | 2020-05-13 | 2020-05-13 | Prestressed hollow floor slab and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010401502.0A CN111561093A (en) | 2020-05-13 | 2020-05-13 | Prestressed hollow floor slab and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111561093A true CN111561093A (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010401502.0A Pending CN111561093A (en) | 2020-05-13 | 2020-05-13 | Prestressed hollow floor slab and construction method thereof |
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| Country | Link |
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| CN (1) | CN111561093A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266467A (en) * | 1997-03-21 | 1998-10-06 | P S Co Ltd | Reinforced spacer |
| JP2012046991A (en) * | 2010-08-27 | 2012-03-08 | Takenaka Komuten Co Ltd | Composite beam, building, and construction method for composite beam |
| CN203531200U (en) * | 2013-11-11 | 2014-04-09 | 内蒙古蒙西工程设计有限公司 | Wholly prefabricated hollow floor |
| CN105275096A (en) * | 2015-09-17 | 2016-01-27 | 中民筑友有限公司 | Prefabricated pieced two-way slab construction method |
| CN205153138U (en) * | 2015-09-17 | 2016-04-13 | 中民筑友有限公司 | Prefabricated building of amalgamation |
| CN205296575U (en) * | 2016-01-14 | 2016-06-08 | 中国建筑设计院有限公司 | A precast floor plank for modularization building |
| CN205917945U (en) * | 2016-07-22 | 2017-02-01 | 中民筑友科技投资有限公司 | Floor connected node |
| CN208604813U (en) * | 2018-06-26 | 2019-03-15 | 中民筑友有限公司 | A kind of assembled floor construction |
| CN212506954U (en) * | 2020-05-13 | 2021-02-09 | 湖北大成空间科技股份有限公司 | A prestressed hollow floor slab |
-
2020
- 2020-05-13 CN CN202010401502.0A patent/CN111561093A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266467A (en) * | 1997-03-21 | 1998-10-06 | P S Co Ltd | Reinforced spacer |
| JP2012046991A (en) * | 2010-08-27 | 2012-03-08 | Takenaka Komuten Co Ltd | Composite beam, building, and construction method for composite beam |
| CN203531200U (en) * | 2013-11-11 | 2014-04-09 | 内蒙古蒙西工程设计有限公司 | Wholly prefabricated hollow floor |
| CN105275096A (en) * | 2015-09-17 | 2016-01-27 | 中民筑友有限公司 | Prefabricated pieced two-way slab construction method |
| CN205153138U (en) * | 2015-09-17 | 2016-04-13 | 中民筑友有限公司 | Prefabricated building of amalgamation |
| CN205296575U (en) * | 2016-01-14 | 2016-06-08 | 中国建筑设计院有限公司 | A precast floor plank for modularization building |
| CN205917945U (en) * | 2016-07-22 | 2017-02-01 | 中民筑友科技投资有限公司 | Floor connected node |
| CN208604813U (en) * | 2018-06-26 | 2019-03-15 | 中民筑友有限公司 | A kind of assembled floor construction |
| CN212506954U (en) * | 2020-05-13 | 2021-02-09 | 湖北大成空间科技股份有限公司 | A prestressed hollow floor slab |
Non-Patent Citations (1)
| Title |
|---|
| 李新, 李锦, 杨晓宏: "P型大跨度预应力混凝土空心板简介", 新型建筑材料, no. 12, 1 December 1996 (1996-12-01), pages 41 - 43 * |
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