CN111456307A - Prestressed precast reinforced concrete hollow slab connecting structure and construction method thereof - Google Patents
Prestressed precast reinforced concrete hollow slab connecting structure and construction method thereof Download PDFInfo
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- CN111456307A CN111456307A CN202010303768.1A CN202010303768A CN111456307A CN 111456307 A CN111456307 A CN 111456307A CN 202010303768 A CN202010303768 A CN 202010303768A CN 111456307 A CN111456307 A CN 111456307A
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- precast
- reinforced concrete
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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
-
- 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
-
- 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
- E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a prestressed precast reinforced concrete hollow slab connecting structure and a construction method thereof, wherein the connecting structure comprises a prestressed precast reinforced concrete hollow slab, and the prestressed precast reinforced concrete hollow slab comprises precast slab concrete, a plurality of prestressed reinforcements, a plurality of embedded connectors and a plurality of anchoring reinforcements; the prestressed reinforcements penetrate through the bottom of the precast slab concrete at intervals along the extending direction of the precast slab concrete; the embedded connectors are embedded on the top surfaces of two end parts of the precast slab concrete at intervals along the width direction of the precast slab concrete, and the length direction of the embedded connectors is parallel to the extending direction of the precast slab concrete; each pre-buried connector is welded with an anchoring steel bar, and the anchoring steel bar is buried in the precast slab concrete. The prestressed precast reinforced concrete hollow slab connecting structure and the construction method thereof have the advantages of simple structure and convenient construction, and can form effective bolt connection at the end part of the prestressed precast concrete hollow slab to prevent the floor from falling.
Description
Technical Field
The invention relates to the technical field of civil engineering assembly type buildings, in particular to a prestressed precast reinforced concrete hollow slab connecting structure and a construction method thereof.
Background
The prestressed prefabricated reinforced concrete hollow slab has the advantages of simple structure, light weight, convenient and quick construction, high prefabrication degree, low comprehensive cost and the like, and is widely applied to the fields of buildings, municipal works, road engineering and the like. At present, the prestressed precast reinforced concrete hollow slab generally has no rib at the end part, and one reason is that if the rib is formed, a hole needs to be formed on a mould during manufacturing, so that the mould is not easy to clean and recycle; and secondly, the ribs are inconvenient to transport and store. However, if the ends of the prestressed precast reinforced concrete hollow slab are not reliably connected, the earthquake resistance and the overall safety of the structure are seriously adversely affected. At present, in actual engineering, a method of chiseling a plate end, then placing a connecting steel bar and post-pouring concrete is adopted, the construction is complicated, and the integrity of a hollow plate can be damaged. Therefore, a safe and convenient end connection method is needed to ensure the safety and integrity of the prestressed precast reinforced concrete hollow slab under the action of an earthquake.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the prestressed precast reinforced concrete hollow slab connecting structure and the construction method thereof, which have the advantages of simple structure and convenient construction, and can form effective bolt connection at the end part of the prestressed precast concrete hollow slab to prevent the floor from falling.
In order to achieve the above object, the present invention provides a prestressed precast reinforced concrete hollow slab connection structure, comprising a prestressed precast reinforced concrete hollow slab, the prestressed precast reinforced concrete hollow slab comprising a precast slab concrete, a plurality of prestressed reinforcements, a plurality of pre-buried connectors, and a plurality of anchoring reinforcements; the prestressed reinforcements penetrate through the bottom of the precast slab concrete at intervals along the extending direction of the precast slab concrete; the embedded connectors are embedded on the top surfaces of two end parts of the precast slab concrete at intervals along the width direction of the precast slab concrete, and the length direction of the embedded connectors is parallel to the extending direction of the precast slab concrete; each pre-buried connector is welded with one anchoring steel bar, and the anchoring steel bars are buried in the precast slab concrete.
Preferably, the embedded connector is a steel embedded connecting piece, and the embedded connector and the anchoring steel bar are connected by double-sided lap welding.
Preferably, the prefabricated reinforced concrete hollow slab comprises two prestressed prefabricated reinforced concrete hollow slabs, a plurality of bolt connecting pieces, a prefabricated reinforced concrete superposed beam and a post-cast concrete superposed layer; the two prestressed precast reinforced concrete hollow slabs are arranged at intervals along a straight line, and the adjacent ends of the two prestressed precast reinforced concrete hollow slabs are erected on brackets formed by extending the two sides of the precast reinforced concrete superposed beam; the adjacent ends of the two prestressed precast reinforced concrete hollow slabs are respectively provided with the embedded connectors; the bolt connecting piece is connected between the two embedded connectors corresponding to the adjacent ends of the two prestressed precast reinforced concrete hollow slabs; the post-cast concrete superposed layer is poured between the two pre-stressed precast reinforced concrete hollow slabs and on part of the upper surface of the pre-stressed precast reinforced concrete hollow slabs and covers the bolt connecting piece, part of the pre-embedded connector and part of the precast reinforced concrete superposed beam.
Preferably, the bolt connecting piece comprises a steel bar, and both ends of the steel bar are provided with external threads; the bolt connecting piece is connected between the two pre-embedded connectors corresponding to the adjacent ends of the two pre-stressed precast reinforced concrete hollow slabs through the external threads and the bolts.
Preferably, the precast reinforced concrete composite beam comprises precast beam concrete, a plurality of transverse stirrups and four longitudinal steel bars; two sides of the precast beam concrete extend outwards to form the corbels; the transverse stirrups are embedded at intervals along the longitudinal direction of the precast beam concrete and partially expose out of the upper surface of the precast beam concrete; the transverse stirrups are rectangular, and the longitudinal steel bars are respectively penetrated through and connected to the inner sides of four top angles of the transverse stirrups; and the two longitudinal steel bars are arranged at the bottom of the precast beam concrete, and the other two longitudinal steel bars are exposed out of the upper surface of the precast beam concrete.
Preferably, the post-cast concrete laminated layer covers the two longitudinal steel bars exposed out of the upper surface of the concrete of the precast beam, the part of the transverse stirrup exposed out of the upper surface of the concrete of the precast beam and part of the embedded connector.
Preferably, the precast slab concrete end includes a plurality of holes, the hole shutoff has rubber buffer or rigid foam stopper.
Preferably, the post-cast concrete laminated layer is made of micro-expanded fine aggregate concrete or ultra-high performance concrete.
The invention relates to a construction method of a prestressed precast reinforced concrete hollow slab connection structure based on the invention, which comprises the following steps:
s1: connecting the pre-buried connector and the anchoring steel bar by double-sided lap welding, fixing the positions of the pre-buried connector and the anchoring steel bar with the positions of the prestressed steel bars, tensioning the prestressed steel bars, and pouring the precast slab concrete to form the prestressed precast reinforced concrete hollow slab;
s2: placing the end part of the prestressed precast reinforced concrete hollow slab on the bracket of the precast reinforced concrete superposed beam;
s3: the two ends of the bolt connecting piece are threaded to form external threads and are connected between the two embedded connectors corresponding to the adjacent ends of the two prestressed precast reinforced concrete hollow slabs through bolts;
s4: and pouring the post-cast concrete laminated layer.
Preferably, in the S3 step, the bolt coupler is prevented from colliding with the transversal stirrups and the longitudinal bars.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the connector is embedded in the end part of the prestressed precast reinforced concrete hollow slab, and a bolt connecting structure is formed at the end part. The invention has simple structure and convenient construction, does not need to cut and break the end part of the hollow slab, can avoid reserving beard ribs at the end part of the hollow slab, and is convenient for manufacturing, transporting and storing. The invention can form a safe and reliable bolt connection structure at the end part of the hollow slab, can ensure the safety and integrity of the prestressed precast reinforced concrete hollow slab under the action of an earthquake, and has great promotion effect on the healthy and stable development of the fabricated building.
Drawings
FIG. 1 is a schematic structural view of a prestressed prefabricated reinforced concrete hollow slab according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a prestressed precast reinforced concrete hollow slab connection structure according to an embodiment of the present invention;
FIG. 3 is a sectional view of a prestressed prefabricated reinforced concrete hollow slab connection structure according to an embodiment of the present invention;
fig. 4 is a schematic view of a connection structure of the embedded connector, the anchoring bar, and the bolt connector according to the embodiment of the present invention;
FIG. 5 is a schematic view showing an end structure of a prestressed prefabricated reinforced concrete hollow slab according to an embodiment of the present invention;
FIG. 6 is a flow chart of a construction method according to an embodiment of the present invention.
Detailed Description
The following description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings of fig. 1 to 5, and will make the functions and features of the present invention better understood.
Referring to fig. 1, a prestressed precast reinforced concrete hollow slab connection structure according to an embodiment of the present invention includes a prestressed precast reinforced concrete hollow slab 1, where the prestressed precast reinforced concrete hollow slab 1 includes a precast slab concrete 11, a plurality of prestressed reinforcements 12, a plurality of embedded connectors 13, and a plurality of anchoring reinforcements 14; the prestressed reinforcements 12 penetrate through the bottom of the precast slab concrete 11 at intervals along the extending direction of the precast slab concrete 11; the embedded connectors 13 are embedded on the top surfaces of two end parts of the precast slab concrete 11 at intervals along the width direction of the precast slab concrete 11, and the length direction of the embedded connectors 13 is parallel to the extending direction of the precast slab concrete 11; each pre-buried connector 13 is welded with an anchoring steel bar 14, and the anchoring steel bars 14 are buried in the precast slab concrete 11.
In this embodiment, pre-buried connector 13 adopts steel pre-buried connecting piece, and pre-buried connector 13 adopts two-sided overlap welding to be connected with anchor reinforcing bar 14.
Referring to fig. 2 and 3, the prefabricated reinforced concrete hollow slab comprises two prestressed prefabricated reinforced concrete hollow slabs 1, a plurality of bolt connectors 2, a prefabricated reinforced concrete composite beam 3 and a post-cast concrete composite layer 4; the two prestressed precast reinforced concrete hollow slabs 1 are arranged at intervals along a straight line, and the adjacent ends of the two prestressed precast reinforced concrete hollow slabs 1 are erected on brackets formed by extending the two sides of the precast reinforced concrete superposed beam 3; the adjacent ends of the two prestressed precast reinforced concrete hollow slabs 1 are respectively provided with an embedded connector 13; the bolt connecting piece 2 is connected between two pre-embedded connectors 13 corresponding to the adjacent ends of the two pre-stressed precast reinforced concrete hollow slabs 1; the post-cast concrete superposed layer 4 is formed between the two prestressed precast reinforced concrete hollow slabs 1 and on part of the upper surface in a pouring manner, and covers the bolt connecting piece 2, part of the embedded connector 13 and part of the precast reinforced concrete superposed beam 3.
The prestressed precast reinforced concrete hollow slab 1 is manufactured in a factory in advance and is connected with the post-cast concrete laminated layer 4 through the end bolt connecting piece 2 on a construction site to form a prestressed precast reinforced concrete hollow slab connecting structure.
The prefabricated reinforced concrete superposed beam 3 comprises prefabricated beam concrete 31, a plurality of transverse stirrups 32 and four longitudinal reinforcing steel bars 33; two sides of the precast beam concrete 31 extend outwards to form brackets; the transverse stirrups 32 are embedded at intervals along the longitudinal direction of the precast beam concrete 31 and partially exposed out of the upper surface of the precast beam concrete 31; the transverse stirrups 32 are rectangular, and the longitudinal steel bars 33 are respectively penetrated through and connected to the inner sides of four top angles of the transverse stirrups 32; two longitudinal steel bars 33 are disposed at the bottom of the precast beam concrete 31, and the other two longitudinal steel bars 33 are exposed from the upper surface of the precast beam concrete 31.
The post-cast concrete laminated layer 4 covers the two longitudinal steel bars 33 exposed out of the upper surface of the precast beam concrete 31, the part of the transverse stirrups 32 exposed out of the upper surface of the precast beam concrete 31 and the depression of the embedded connector 13.
The anchoring length L of the anchoring bar 14 should be no less than the lap length of the longitudinal tensioned rebar tying lap joint of current concrete structure design codes.
Referring to fig. 4, the bolt connector 2 includes a reinforcing bar, both ends of which are formed with external threads; the bolt connecting piece 2 is connected between the two pre-embedded connectors 13 corresponding to the adjacent ends of the two pre-stressed precast reinforced concrete hollow slabs 1 through external threads and bolts 5.
The upper part of the embedded connector 13 is opened and comprises an end plate 131 and an arc surface 132; the end plate 131 is fixed to one end of the arc surface 132, the end plate 131 forms a connection hole 133, and the arc surface 132 is welded to the anchoring bar 14. The bolt connector 2 is inserted into the connection hole 133 and is fixed to the end plate 131 by bolts 5.
The post-cast concrete laminated layer 4 is made of micro-expansion fine stone concrete or ultra-high performance concrete.
Referring to fig. 1, 4 and 5, the end of the precast slab concrete 11 includes a plurality of holes 15, and before the post-cast concrete laminated layer 4 is cast, the holes 15 are sealed with rubber plugs or rigid foam plugs.
Referring to fig. 3 and 6, a construction method of a prestressed precast reinforced concrete hollow slab connection structure according to an embodiment of the present invention includes:
s1: connecting the pre-buried connector 13 and the anchoring steel bar 14 through double-sided lap welding, fixing the positions of the pre-buried connector 13, the anchoring steel bar 14 and the prestressed steel bar 12, tensioning the prestressed steel bar 12, and pouring the precast slab concrete 11 to form the prestressed precast reinforced concrete hollow slab 1;
s2: placing the end part of the prestressed precast reinforced concrete hollow slab 1 on a bracket of a precast reinforced concrete superposed beam 3;
s3: the two ends of the bolt connecting piece 2 are threaded to form external threads and are connected between two corresponding pre-embedded connectors 13 at the adjacent ends of the two prestressed precast reinforced concrete hollow slabs 1 through bolts 5;
collision of the bolt connector 2 with the transverse stirrups 32 and the longitudinal reinforcements 33 is avoided;
s4: and pouring the concrete laminated layer 4 after pouring.
According to the connecting structure and the construction method of the prestressed precast reinforced concrete hollow slab, the embedded connector 13 is arranged at the end part of the prestressed precast reinforced concrete hollow slab 1, and the bolt connecting structure is formed at the end part, so that the structure is simple, the construction is convenient, the end part of the hollow slab is not required to be cut and broken, the beard rib can be prevented from being reserved at the end part of the hollow slab, and the transportation and the storage are convenient. And a safe and reliable bolt connection structure can be formed at the end part of the prestressed precast reinforced concrete hollow slab 1, so that the safety and integrity of the prestressed precast reinforced concrete hollow slab 1 under the action of an earthquake can be ensured, and the healthy and stable development of the fabricated building can be greatly promoted.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The connecting structure of the prestressed precast reinforced concrete hollow slab is characterized by comprising a prestressed precast reinforced concrete hollow slab, wherein the prestressed precast reinforced concrete hollow slab comprises precast slab concrete, a plurality of prestressed reinforcements, a plurality of embedded connectors and a plurality of anchoring reinforcements; the prestressed reinforcements penetrate through the bottom of the precast slab concrete at intervals along the extending direction of the precast slab concrete; the embedded connectors are embedded on the top surfaces of two end parts of the precast slab concrete at intervals along the width direction of the precast slab concrete, and the length direction of the embedded connectors is parallel to the extending direction of the precast slab concrete; each pre-buried connector is welded with one anchoring steel bar, and the anchoring steel bars are buried in the precast slab concrete.
2. The prestressed precast reinforced concrete hollow slab connection structure as claimed in claim 1, wherein said embedded connector is a steel embedded connector, and said embedded connector and said anchoring bar are connected by double-side lap welding.
3. The prestressed precast reinforced concrete hollow slab connection structure according to claim 1, comprising two said prestressed precast reinforced concrete hollow slabs, a plurality of bolt connection members, a precast reinforced concrete superposed beam and a post-cast concrete superposed layer; the two prestressed precast reinforced concrete hollow slabs are arranged at intervals along a straight line, and the adjacent ends of the two prestressed precast reinforced concrete hollow slabs are erected on brackets formed by extending the two sides of the precast reinforced concrete superposed beam; the adjacent ends of the two prestressed precast reinforced concrete hollow slabs are respectively provided with the embedded connectors; the bolt connecting piece is connected between the two embedded connectors corresponding to the adjacent ends of the two prestressed precast reinforced concrete hollow slabs; the post-cast concrete superposed layer is poured between the two pre-stressed precast reinforced concrete hollow slabs and on part of the upper surface of the pre-stressed precast reinforced concrete hollow slabs and covers the bolt connecting piece, part of the pre-embedded connector and part of the precast reinforced concrete superposed beam.
4. The prestressed precast reinforced concrete hollow slab connection structure according to claim 3, wherein said bolt connection member comprises a reinforcing bar, both ends of which are formed with external threads; the bolt connecting piece is connected between the two pre-embedded connectors corresponding to the adjacent ends of the two pre-stressed precast reinforced concrete hollow slabs through the external threads and the bolts.
5. The pre-stressed precast reinforced concrete hollow slab connection structure according to claim 3, wherein the precast reinforced concrete composite beam comprises a precast beam concrete, a plurality of transverse stirrups and four longitudinal reinforcements; two sides of the precast beam concrete extend outwards to form the corbels; the transverse stirrups are embedded at intervals along the longitudinal direction of the precast beam concrete and partially expose out of the upper surface of the precast beam concrete; the transverse stirrups are rectangular, and the longitudinal steel bars are respectively penetrated through and connected to the inner sides of four top angles of the transverse stirrups; and the two longitudinal steel bars are arranged at the bottom of the precast beam concrete, and the other two longitudinal steel bars are exposed out of the upper surface of the precast beam concrete.
6. The prestressed precast reinforced concrete hollow slab connection structure according to claim 5, wherein said post-cast concrete laminated layer covers both of said longitudinal reinforcing bars exposed from the concrete upper surface of said precast beam, a portion of said transverse stirrups exposed from the concrete upper surface of said precast beam, and a portion of said embedded connectors.
7. The pre-stressed precast reinforced concrete hollow slab connection structure according to claim 5, wherein the precast slab concrete end comprises a plurality of holes, and the holes are plugged with rubber plugs or rigid foam plastic plugs.
8. The prestressed precast reinforced concrete hollow slab connection structure according to claim 5, wherein the post-cast concrete laminated layer is made of micro-expanded fine stone concrete or ultra-high performance concrete.
9. A construction method of the prestressed precast reinforced concrete hollow slab connection structure based on claim 3, comprising the steps of:
s1: connecting the pre-buried connector and the anchoring steel bar by double-sided lap welding, fixing the positions of the pre-buried connector and the anchoring steel bar with the positions of the prestressed steel bars, tensioning the prestressed steel bars, and pouring the precast slab concrete to form the prestressed precast reinforced concrete hollow slab;
s2: placing the end part of the prestressed precast reinforced concrete hollow slab on the bracket of the precast reinforced concrete superposed beam;
s3: the two ends of the bolt connecting piece are threaded to form external threads and are connected between the two embedded connectors corresponding to the adjacent ends of the two prestressed precast reinforced concrete hollow slabs through bolts;
s4: and pouring the post-cast concrete laminated layer.
10. The construction method according to claim 9, wherein in the step S3, the bolt coupling is prevented from colliding with the transversal stirrups and the longitudinal bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010303768.1A CN111456307A (en) | 2020-04-17 | 2020-04-17 | Prestressed precast reinforced concrete hollow slab connecting structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010303768.1A CN111456307A (en) | 2020-04-17 | 2020-04-17 | Prestressed precast reinforced concrete hollow slab connecting structure and construction method thereof |
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| CN111456307A true CN111456307A (en) | 2020-07-28 |
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| CN202010303768.1A Pending CN111456307A (en) | 2020-04-17 | 2020-04-17 | Prestressed precast reinforced concrete hollow slab connecting structure and construction method thereof |
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Cited By (2)
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| CN112302231A (en) * | 2020-10-12 | 2021-02-02 | 上海市建筑科学研究院有限公司 | Prefabricated double-T-plate end connecting structure and construction method thereof |
| CN114856030A (en) * | 2022-06-08 | 2022-08-05 | 青岛中科坤泰装配建筑科技有限公司 | Prefabricated side wall board and prefabricated plate's connected node |
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| CN114856030A (en) * | 2022-06-08 | 2022-08-05 | 青岛中科坤泰装配建筑科技有限公司 | Prefabricated side wall board and prefabricated plate's connected node |
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Application publication date: 20200728 |
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