CN112647631A - Close piece together unidirectional superimposed sheet of notch cuttype PC prestressing force - Google Patents
Close piece together unidirectional superimposed sheet of notch cuttype PC prestressing force Download PDFInfo
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- CN112647631A CN112647631A CN201910956466.1A CN201910956466A CN112647631A CN 112647631 A CN112647631 A CN 112647631A CN 201910956466 A CN201910956466 A CN 201910956466A CN 112647631 A CN112647631 A CN 112647631A
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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
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
- E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
- E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
Abstract
The invention discloses a close-spliced stepped PC (polycarbonate) prestressed one-way composite slab, which comprises a one-way composite slab main body, wherein the middle of the one-way composite slab main body is high, the periphery of the one-way composite slab main body is low, the middle region adopts a full-prefabricated form, the periphery region adopts a superposed form, the periphery region is a superposed region for arranging and reserving gluten on site, an upper transverse steel bar and an upper longitudinal steel bar are arranged in the middle region, a lower transverse steel bar and a lower longitudinal steel bar are arranged in the periphery region, a pipeline and a plurality of bolt hoisting points are pre-buried in the middle region, a wire box is pre-buried in the periphery region, and the wire box is connected. The middle area of the invention is fully prefabricated, the cast-in-place quantity on site is reduced by 50%, the cast-in-place construction efficiency on site is improved, the middle area of the plate is fully prefabricated, part of upper reinforcing steel bars are embedded and bound, the binding construction efficiency of the reinforcing steel bars on site is improved, meanwhile, 50% of pipelines in the middle area of the plate are embedded in advance, the installation quantity of water and electricity on site is greatly reduced, and the construction efficiency of water and electricity is improved.
Description
Technical Field
The invention relates to the technical field of fabricated concrete buildings, in particular to a close-spliced stepped PC prestressed unidirectional laminated slab.
Background
At present, the conventional PC laminated slab is not strong in bending resistance because the thickness of the prefabricated slab is small and is usually only 7-8 mm, and the components are easy to damage in the transportation and installation processes. In addition, the conventional PC composite slabs have a large amount of steel due to the provision of the internal truss reinforcing bars. And thirdly, the upper part steel bar binding and the water and electricity pre-embedding are required to be carried out on the upper part laminated layer of the PC laminated slab, so that the field installation workload is increased. Thirdly, close splicing is not adopted between the PC boards, a later-stage formwork support is needed, and certain workload is brought to construction.
Disclosure of Invention
The invention aims to provide a close-spliced ladder type PC prestressed unidirectional laminated slab aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a close one-way superimposed sheet of amalgamation notch cuttype PC prestressing force, includes one-way superimposed sheet main part, and its innovation point lies in: high in the middle of the one-way superimposed sheet main part, low all around, and the middle zone adopts full prefabricated form, and the zone adopts the coincide form all around, and the zone is arranged the coincide region of reservation for being used for the gluten scene all around, set up upper portion horizontal reinforcing bar and upper portion longitudinal reinforcement in the middle zone, set up lower part horizontal reinforcing bar and lower part longitudinal reinforcement in the zone all around, pre-buried pipeline and a plurality of bolt hoisting point of setting in the middle zone, pre-buried line box that sets up in the zone all around, line box and pipe connection.
Further, the overlapping region satisfies a length in which the upper transverse reinforcing bars and the upper longitudinal reinforcing bars overlap each other.
Furthermore, the lower transverse steel bar is completely positioned in the concrete laminated layer, and no steel bar is arranged.
Furthermore, the joints between the unidirectional composite slab main bodies, which do not have ribs, are connected in a close splicing mode.
Furthermore, the lower longitudinal steel bars are longitudinally arranged in the unidirectional laminated slab main body in advance by adopting prestressed steel bars in the production stage.
After adopting the structure, the invention has the beneficial effects that:
1. the middle area of the plate is fully prefabricated, the on-site cast-in-place quantity is reduced by 50%, the on-site cast-in-place construction efficiency is improved, the middle area of the plate is fully prefabricated, part of upper reinforcing steel bars are embedded and bound, the on-site reinforcing steel bar binding construction efficiency is improved, meanwhile, 50% of pipelines in the middle area of the plate are embedded in advance, the on-site hydropower installation quantity is greatly reduced, and the hydropower construction efficiency is improved; the middle area of the concrete is fully prefabricated, and after the concrete is accurately hoisted, the elevation of the fully prefabricated part provides a reference basis for the elevation of subsequent post-cast concrete, so that the leveling precision of floor pouring construction is improved;
2. the invention cancels truss structure ribs, and can greatly reduce steel bar materials;
3. the middle of the invention is fully prefabricated, and the bending resistance and the stress resistance can be enhanced in the transportation stage, so that the invention is not easy to be damaged by vibration in the transportation process and the quality is easy to control; the bending resistance and the stress can be enhanced in the construction stage, so that less support can be arranged at the bottom of the plate in the construction stage, the construction speed is improved, and the construction measure cost is reduced;
4. the lower longitudinal steel bars are arranged by adopting the prestressed steel bars, so that the anti-cracking performance of the member is improved, the flexural deflection of the member is reduced, and the large-span arrangement of the laminated slab is facilitated; meanwhile, the lower transverse steel bars can not be connected in a close splicing mode, a post-pouring area is removed, bottom support and formwork support in the post-pouring area are removed, construction efficiency is obviously improved, formwork support and formwork removal are facilitated in a production stage, and formwork utilization rate and production efficiency are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of A in FIG. 1;
FIG. 3 is a cross-sectional view of B of FIG. 1;
FIG. 4 is a cross-sectional view of C of FIG. 1;
FIG. 5 is a close-coupled node construction diagram according to the present invention;
FIG. 6 is a structural diagram of a support node without ribs;
fig. 7 is a design and construction diagram for a building.
Description of reference numerals:
1 middle area, 2 peripheral areas, 3 upper transverse steel bars, 4 upper longitudinal steel bars, 5 lower transverse steel bars, 6 lower longitudinal steel bars, 7 pipelines, 8 bolt hoisting points, 9 wire boxes, 10 post-pouring areas, 11 binding steel bars and 12 common construction steel bars.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1-4, a close amalgamation notch cuttype PC prestressing force one-way superimposed sheet, including one-way superimposed sheet main part, one-way superimposed sheet main part middle height, low all around, and middle zone 1 adopts full prefabricated form, and regional 2 all around adopts the coincide form, and regional 2 all around is for being used for the coincide region that the gluten field arrangement was reserved, sets up upper portion horizontal reinforcing bar 3 and upper portion longitudinal reinforcement 4 in middle zone 1, sets up lower part horizontal reinforcing bar 5 and lower part longitudinal reinforcement 6 in regional 2 all around, pre-buried pipeline 7 and a plurality of bolt hoisting point 8 that set up in middle zone 1, pre-buried line box 9 that sets up in regional 2 all around, line box 9 is connected with pipeline 7.
In this embodiment, the overlapping area satisfies the length of the overlap joint between the upper transverse reinforcing bars 3 and the upper longitudinal reinforcing bars 4.
In this embodiment, the lower transverse reinforcement 5 is completely located within the concrete composite layer, and no reinforcement is formed.
In this embodiment, the joints between the unidirectional composite boards without ribs are connected by close splicing.
In this embodiment, the lower longitudinal reinforcement 6 is longitudinally arranged in the unidirectional laminated slab body in advance by using a prestressed reinforcement in the production stage.
In summary, 1, the south side, the east side and the west side of the unidirectional laminated slab are all supported at the support of the shear wall, and the reinforcing steel bars at the lower parts of the north side and the south side of the unidirectional laminated slab do not form ribs. Under the condition that the laminated slab is not supported by a support, the laminated slab can be considered to be connected with the laminated slabs of the same type in a close splicing mode, the structure of a connecting joint is shown in detail in figure 5, and a close splicing position post-pouring area 10 between two pieces of unidirectional laminated slabs adopts on-site binding reinforcing steel bars 11 and additional common construction reinforcing steel bars 12. The node connection should meet the structural requirement of connecting the upper longitudinal steel bars 4 at the bottom of the JGJ1-2014 No. 6.6.5 slab and meet the overlapping length requirement of the upper transverse steel bars 3 at the dense splicing nodes. 2. No rib is arranged on the south side of the one-way laminated slab, the mode of 'adding common construction steel bars + connecting longitudinal ribs with the bottom plate' can be considered to be adopted for connecting with the support, and the structure of the connecting node is shown in detail in figure 6. The node connection should meet the structural requirement of connecting the upper longitudinal steel bars 4 at the bottom of the JGJ1-2014 No. 6.6.4 slab and meet the overlapping length requirement of the upper transverse steel bars 3 at the dense splicing nodes.
Referring to fig. 7, a shaded area in fig. 7 is a design construction diagram for a building of the present invention.
In the embodiment, the construction steps of the invention are as follows:
(1) the method comprises the steps of placing a support position line → (2) installing support → (3) adjusting the support height to a preset elevation → (4) placing a support keel → (5) rechecking a main keel elevation → (6) hoisting the laminated slab, and adopting a special bolt hoisting point hoisting manner in a hoisting mode → (7) adjusting and rechecking a bottom elevation of the laminated slab → (8) on site only binding part of upper steel bars and installation part of water and electricity pipelines → (9) pouring remaining part of surface layer concrete after concealed acceptance → (10) and curing concrete → (11).
Synthesize the close joggle nodal connection mode of above-mentioned one-way superimposed sheet, one-way superimposed sheet inner structure and construction steps, can see that this superimposed sheet technique compares with prior art and has following advantage:
1. the middle area of the plate is fully prefabricated, the on-site cast-in-place quantity is reduced by 50%, the on-site cast-in-place construction efficiency is improved, the middle area of the plate is fully prefabricated, part of upper reinforcing steel bars are embedded and bound, the on-site reinforcing steel bar binding construction efficiency is improved, meanwhile, 50% of pipelines in the middle area of the plate are embedded in advance, the on-site hydropower installation quantity is greatly reduced, and the hydropower construction efficiency is improved; the middle area of the concrete is fully prefabricated, and after the concrete is accurately hoisted, the elevation of the fully prefabricated part provides a reference basis for the elevation of subsequent post-cast concrete, so that the leveling precision of floor pouring construction is improved;
2. the invention cancels truss structure ribs, and can greatly reduce steel bar materials;
3. the middle of the invention is fully prefabricated, and the bending resistance and the stress resistance can be enhanced in the transportation stage, so that the invention is not easy to be damaged by vibration in the transportation process and the quality is easy to control; the bending resistance and the stress can be enhanced in the construction stage, so that less support can be arranged at the bottom of the plate in the construction stage, the construction speed is improved, and the construction measure cost is reduced;
4. the lower longitudinal steel bars are arranged by adopting the prestressed steel bars, so that the anti-cracking performance of the member is improved, the flexural deflection of the member is reduced, and the large-span arrangement of the laminated slab is facilitated; meanwhile, the lower transverse steel bars can not be connected in a close splicing mode, a post-pouring area is removed, bottom support and formwork support in the post-pouring area are removed, construction efficiency is obviously improved, formwork support and formwork removal are facilitated in a production stage, and formwork utilization rate and production efficiency are improved.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a close one-way superimposed sheet of close concatenation notch cuttype PC prestressing force, includes one-way superimposed sheet main part, its characterized in that: high in the middle of the one-way superimposed sheet main part, low all around, and the middle zone adopts full prefabricated form, and the zone adopts the coincide form all around, and the zone is arranged the coincide region of reservation for being used for the gluten scene all around, set up upper portion horizontal reinforcing bar and upper portion longitudinal reinforcement in the middle zone, set up lower part horizontal reinforcing bar and lower part longitudinal reinforcement in the zone all around, pre-buried pipeline and a plurality of bolt hoisting point of setting in the middle zone, pre-buried line box that sets up in the zone all around, line box and pipe connection.
2. The close-spliced ladder type PC prestressed unidirectional laminated slab as claimed in claim 1, wherein: the overlapping region satisfies the length of the lap joint between the upper transverse reinforcing bars and between the upper longitudinal reinforcing bars.
3. The close-spliced ladder type PC prestressed unidirectional laminated slab as claimed in claim 1, wherein: the lower transverse steel bar is completely positioned in the concrete laminated layer, and no steel bar is produced.
4. A close-packed stair type PC pre-stressed unidirectional laminated slab according to claim 1 or 3, wherein: the joints without ribs between the main bodies of the unidirectional superimposed sheets are connected in a close splicing mode.
5. The close-spliced ladder type PC prestressed unidirectional laminated slab as claimed in claim 1, wherein: and the lower longitudinal steel bars are longitudinally arranged in the unidirectional laminated slab main body in advance by adopting prestressed steel bars in the production stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956466.1A CN112647631A (en) | 2019-10-10 | 2019-10-10 | Close piece together unidirectional superimposed sheet of notch cuttype PC prestressing force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956466.1A CN112647631A (en) | 2019-10-10 | 2019-10-10 | Close piece together unidirectional superimposed sheet of notch cuttype PC prestressing force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112647631A true CN112647631A (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910956466.1A Pending CN112647631A (en) | 2019-10-10 | 2019-10-10 | Close piece together unidirectional superimposed sheet of notch cuttype PC prestressing force |
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| Country | Link |
|---|---|
| CN (1) | CN112647631A (en) |
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- 2019-10-10 CN CN201910956466.1A patent/CN112647631A/en active Pending
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