CN216109005U - Support-free or few-support connection joint of full-prefabricated floor slab and superposed beam - Google Patents
Support-free or few-support connection joint of full-prefabricated floor slab and superposed beam Download PDFInfo
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- CN216109005U CN216109005U CN202121437388.3U CN202121437388U CN216109005U CN 216109005 U CN216109005 U CN 216109005U CN 202121437388 U CN202121437388 U CN 202121437388U CN 216109005 U CN216109005 U CN 216109005U
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Abstract
The utility model discloses a support-free or few-support connecting node of a full precast floor slab and a superposed beam, which comprises the full precast floor slab and the superposed beam, wherein a beam slab node area is formed between the full precast floor slab and the superposed beam, corbels are arranged on one side or two sides of the upper end of the superposed beam, a connecting tongue-and-groove matched with the corbels is arranged at the end part of the full precast floor slab, the corbels are positioned in the connecting tongue-and-groove of the full precast floor slab when the full precast floor slab and the superposed beam are assembled in place, and the connecting node is formed by casting concrete in situ to the beam slab node area. The utility model uses the fully-prefabricated floor slab and the superposed beam with the bracket, so the utility model not only has the advantages of the fully-prefabricated floor slab, but also can support the fully-prefabricated floor slab when the fully-prefabricated floor slab is hoisted to the position assembled with the superposed beam, thereby realizing the purpose of less support or no support. The utility model has the advantages of low cost, convenient construction, reliable stress, low fault tolerance rate of construction and installation and capability of improving the construction stability and safety.
Description
Technical Field
The utility model relates to a beam-slab connection node, in particular to a connection node of a support-free or less-support fully-prefabricated floor slab and a superposed beam.
Background
The ' guidance comments on the rapid development of the fabricated building ' (the ' 2016 ' 71 ' issued by the office of the State department) requires to promote the innovation of the construction mode and the rapid development of the fabricated concrete building, and the ' fabricated evaluation Standard ' (GB/T51129-2017) No. 3.0.3 stipulates that the fabricated building meets the evaluation score of the main structure part of not less than 20 points, wherein the proportion of the components such as the beam, the plate, the stair, the balcony and the air conditioner plate reaches 70-80 percent, the obtainable score is 10-20 points, and the occupation ratio is quite high.
The floor slab is an important structural member, on one hand, the floor slab directly bears the dead weight, the vertical constant load and the live load of a surface layer, a partition wall, furniture, people and the like, and transmits the vertical constant load and the live load to a beam or a column; on the other hand when the structure bears horizontal earthquake effect, regular floor arrangement can regard as the rigidity in self horizontal plane infinitely great, and the floor has only rigid displacement and indeformable under the horizontal load effect to coordinate the anti side force system combined action of major structure and resist horizontal force, simultaneously, can guarantee the effective transmission of space wholeness ability and horizontal force of building. Obviously, the integrity and firmness of the floor-to-beam connection is critical.
The existing prefabricated reinforced concrete prefabricated floor slab can be transported to a construction site for installation after being processed and molded in advance in a factory, so that the construction period of the prefabricated floor slab can be greatly shortened, and the construction cost is reduced. In the traditional cast-in-place structure and most fabricated buildings, a full cast-in-place floor slab or a laminated floor slab is mostly adopted, and the integrity of the floor slab and the connection reliability of the floor slab and a beam column are ensured by utilizing the characteristic of cast-in-place integrated molding. However, under the condition that the application of the fabricated building is more and more extensive, the composite floor slab is the most common prefabricated structural member applied to the current fabricated building, can replace a necessary template of a cast-in-place concrete floor slab, and can greatly reduce the support, which is a favorable factor.
Compared with the traditional cast-in-place structure, the concrete surface quality of the aluminum alloy template construction can achieve the precision of plastering-free leveling, so the aluminum alloy template has more advantages than the laminated slab, and the laminated slab is increased by about 100 yuan/m according to the calculation of the building area2The manufacturing cost of (2) is also more remarkable in inherent defects:
1) the laminated floor slab is in a form of a precast slab and a cast-in-place slab, and the thickness of the floor slab is usually increased compared with that of the cast-in-place slab, so that concrete materials are wasted; the thickness of the common residential floor laminated slab is 130-150 mm.
2) The prefabricated bottom plate can only solve the problems of the template and the bottom plate steel bars, and the surface steel bars still need to be paved on site and concrete is poured.
3) Because the requirement of shear connection between precast slab and the cast-in-place layer often can set up the truss reinforcing bar in the precast slab, causes the increase of reinforcing bar quantity on the one hand, can cause face reinforcing bar and cast-in-place layer pre-buried pipeline to lay the difficulty on the one hand, extravagant manual work and material, cause the extra increase of engineering cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a connection node of a support-free or less-support full-prefabricated floor slab and a superposed beam, which has the advantages of low cost, convenience in construction, reliability in stress, low fault tolerance rate in construction and installation and capability of improving the construction stability and safety.
The purpose of the utility model is realized by the following technical scheme: a connection node of a full precast floor slab and a superposed beam without or with less support comprises the full precast floor slab and the superposed beam, wherein a beam-slab node area is formed between the full precast floor slab and the superposed beam.
On one hand, the utility model uses the full precast floor slab, the slab width and the slab length of the full precast floor slab can be split according to the transportation limit, large precast components are used as far as possible, the number of the precast components is reduced, the production efficiency is improved, and the hoisting times are reduced. The thickness of the fully-prefabricated floor slab is smaller than that of the superimposed slab and the post-cast concrete superimposed layer, so that the total concrete consumption of the fully-prefabricated floor slab is lower than that of the superimposed slab, and the manufacturing cost is lower; the connection of the prefabricated part of the laminated slab and the cast-in-place laminated layer needs to be provided with truss ribs, the using amount of the steel bars is increased, a large number of wet operation links such as steel bar binding operation, concrete pouring and the like exist, the construction site operation of the full prefabricated floor slab is more environment-friendly, the use of templates and supports can be greatly reduced, and the site operation personnel are reduced; the full precast floor slab is according to the structure atress, according to the in-service use arrangement of reinforcement, and its thick board can be adjusted according to the project with the structure, and at the prefabricated production of mill, transportation to engineering place, it is more convenient than prefabricated superimposed sheet in transportation, hoist and mount in-process, and is difficult to the fracture. On the other hand, the utility model uses the superposed beam with the bracket, and when the full precast floor slab is hoisted to the position assembled with the superposed beam, the bracket can support the full precast floor slab, thereby realizing the purpose of little support or no support. The utility model has the advantages of low cost, convenient construction, reliable stress, low fault tolerance rate of construction and installation and capability of improving the construction stability and safety.
As an embodiment of the present invention, the composite beam includes a prefabricated section and a cast-in-place section, the prefabricated section includes a beam main body and a bracket, the beam main body is a rectangular beam, a top surface of the rectangular beam is a plane, and cast-in-place concrete is cast into a beam slab node area to form the cast-in-place section, or the beam main body is a rectangular beam having a top surface provided with a groove, the groove extends along a length direction of the beam main body and is located in the beam slab node area, and cast-in-place concrete is cast into the beam slab node area to form the cast-in-place section.
Longitudinal beam bottom ribs and beam stirrups are pre-embedded in the prefabricating section, the upper ends of the beam stirrups extend to a beam plate joint area, longitudinal beam ribs are bound on the beam plate joint area in the field, and the beam stirrups clamp the beam ribs and the beam bottom ribs.
The fully-prefabricated floor slab is pre-embedded with floor slab gluten and floor slab bottom ribs, wherein the floor slab gluten and the floor slab bottom ribs are respectively composed of longitudinal ribs and transverse ribs.
The beam stirrup is an open stirrup or a closed stirrup, the beam stirrup is positioned below the floor slab gluten, and the beam gluten is positioned between the floor slab gluten and the floor slab bottom rib.
The upper surface of the cast-in-place section of the composite beam is flush with the upper surface of the full precast floor slab.
A grout layer is additionally arranged between the top surface of the bracket and the top surface of the connecting tongue and groove.
In one embodiment of the present invention, the composite beam is a side beam, one side of the composite beam having the bracket is a connection side, the fully precast floor slab is located at the connection side of the composite beam, the transverse rib of the floor slab gluten extends into the beam slab joint area for anchoring, and the floor slab bottom rib does not extend out of the connection tongue and groove.
As another embodiment of the utility model, a composite beam with brackets on two sides is used as a center sill, the fully precast floor slabs are positioned on two sides of the composite beam, transverse ribs of floor slab gluten of the fully precast floor slabs on two sides respectively extend into a beam slab joint area to be mutually lapped and anchored, and floor slab bottom ribs do not extend out of the connecting tongue-and-groove.
The transverse ribs of the floor slab gluten extend into the beam slab joint area from the edge of the beam slab joint area on the same side of the transverse ribs, and the end parts of the transverse ribs of the floor slab gluten extend into the beam slab joint area and are close to the edge of the beam slab joint area on the opposite side and are bent and anchored.
Compared with the prior art, the utility model has the following remarkable effects:
(1) the utility model uses the fully prefabricated floor slab, the slab width and the slab length of the fully prefabricated floor slab can be split according to transportation limitation, large prefabricated components are used as far as possible, the number of the prefabricated components is reduced, the production efficiency is improved, and the hoisting times are reduced. The thickness of the fully-prefabricated floor slab is smaller than that of the superimposed slab and the post-cast concrete superimposed layer, so that the total concrete consumption of the fully-prefabricated floor slab is lower than that of the superimposed slab, and the manufacturing cost is lower; the connection of the prefabricated part of the laminated slab and the cast-in-place laminated layer needs to be provided with truss ribs, the using amount of the steel bars is increased, a large number of wet operation links such as steel bar binding operation, concrete pouring and the like exist, the construction site operation of the full prefabricated floor slab is more environment-friendly, the use of templates and supports can be greatly reduced, and the site operation personnel are reduced; the full precast floor slab is according to the structure atress, according to the in-service use arrangement of reinforcement, and its thick board can be adjusted according to the project with the structure, and at the prefabricated production of mill, transportation to engineering place, it is more convenient than prefabricated superimposed sheet in transportation, hoist and mount in-process, and is difficult to the fracture.
(2) The utility model uses the superposed beam with the bracket, and when the fully-prefabricated floor slab is hoisted to the position assembled with the superposed beam, the bracket can support the fully-prefabricated floor slab, thereby realizing the purpose of less support or no support.
(3) The fully-prefabricated floor slab forms a stable lap joint through the connecting nodes, has low cost and low fault tolerance rate of construction and installation, improves the stability and the safety of construction, reduces on-site wet operation, is convenient to construct, ensures that a construction site is cleaner and more environment-friendly, and increases the construction efficiency.
(4) The full precast floor slab can be integrally cast and precast, the stress integrity of the full precast floor slab can be ensured, the full precast floor slab is safe and reliable by directly overlapping the extending reinforcing steel bars or overlapping the extending reinforcing steel bars by adding gluten, and the construction method of the full precast floor slab is simple, safe and reliable, and has positive influence on the improvement of the construction efficiency。
(5) The utility model is suitable for the construction of the bottom layer, the middle layer and the top layer of various building structures, namely at least one of the bottom layer, the middle layer and the top layer uses the connecting node of the fully prefabricated building and the superposed beam, when one or two layers use the utility model, the other layers can use a cast-in-place structural system or an assembly type structural system, therefore, the utility model can be combined with the cast-in-place structural system and the assembly type structural system for use.
Drawings
The utility model is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic structural view of embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.
Detailed Description
Example 1
As shown in fig. 1, the connection node of a full precast floor slab and a composite beam without support or with less support of the present invention includes a full precast floor slab 1 and a composite beam 2, a beam slab node area 3 is formed between the full precast floor slab 1 and the composite beam 2, corbels 11 are provided at two sides of the upper end of the composite beam 2 of this embodiment as center beams, a connection tongue-and-groove 7 adapted to the corbel 11 is provided at the end of the full precast floor slab 1, the corbel 11 is located in the connection tongue-and-groove 7 of the full precast floor slab 1 when the full precast floor slab 1 and the composite beam 2 are assembled in place, a grout layer 10 is provided between the top surface of the corbel 11 and the top surface of the connection tongue-and-groove 7, and the connection node is formed by casting concrete on site to the beam slab node area 3. In other embodiments, no bedding layer is arranged between the bracket and the connecting tongue-and-groove.
In this embodiment, superposed beam 2 includes prefabricated section and cast-in-place section, and the prefabricated section includes roof beam main part 12 and bracket 11, and roof beam main part 12 is the rectangular beam that the top surface opened the recess, and the recess extends and is located beam slab nodal region 3 along the length direction of roof beam main part, and to beam slab nodal region 3 cast in situ concrete component cast in situ section, the cast in situ section upper surface of superposed beam 2 and the upper surface parallel and level of prefabricated floor 1 entirely.
The prefabricated section is pre-buried to have fore-and-aft beam bottom muscle 5 and beam stirrup 4, and the upper end of beam stirrup 4 extends beam slab nodal area 3, 3 on-the-spot ligatures fore-and-aft beam face muscle 6 in beam slab nodal area, and beam stirrup 4 embraces hoop beam muscle 6 and beam bottom muscle 5. The fully-prefabricated floor slab 1 is pre-embedded with floor slab gluten 8 and floor slab bottom ribs 9, and the floor slab gluten 8 and the floor slab bottom ribs 9 are respectively composed of longitudinal ribs and transverse ribs. Beam stirrup 4 is opening stirrup and is located floor gluten 8's below, and beam surface muscle 6 is located the floor and pours the district, between floor gluten 8 and floor end muscle 9 to be located the within range that beam stirrup 4 encloses the hoop.
The composite beam 2 of this embodiment is used as a center sill, the fully-prefabricated floor slabs 1 are located on two sides of the composite beam 2, the transverse ribs of the floor slab gluten 8 of the fully-prefabricated floor slabs 1 on two sides respectively extend into the beam slab joint area 3 to be mutually lapped, and the floor slab bottom ribs 9 do not extend out of the connecting tongue-and-groove 7. The horizontal muscle of floor gluten 8 stretches into wherein from the 3 edges in the beam slab nodal region rather than the homonymy, and the tip that the horizontal muscle of floor gluten 8 stretches into beam slab nodal region 3 is close to 3 edges in the beam slab nodal region of offside and the anchor of buckling downwards.
The construction process of the utility model is as follows: hoisting a full precast floor slab 1 respectively on the both sides of composite beam 2 and shelving on the bracket of both sides, should set up 20mm thick grout blanket 10 on the bracket top surface before shelving, the horizontal muscle of the floor slab gluten of two full precast floor slabs 1 extends to beam slab nodal area 3 respectively and is located the top of beam stirrup, the horizontal muscle of the floor slab gluten of two full precast floor slabs 1 is straight extension respectively and the overlap joint of each other to 3 border positions of beam slab nodal area buckle anchor, realize the connection of two full precast floor slabs 1 and composite beam 2, the overlap joint length should satisfy relevant standard requirement. At 3 ligature roof beam gluten 4 in beam slab nodal area to fix the roof beam stirrup both sides reinforcing bar upper end at prefabricated section in advance on roof beam gluten 4, roof beam stirrup top reinforcing bar both ends are fixed respectively on roof beam gluten 4. And after the superposed beam 2 and the full precast floor slab 1 are assembled, concrete is cast in situ to the beam slab joint area 3 to form a connecting joint.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the beam stirrup 4 of the laminated beam 2 is a closed stirrup.
Example 3
As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the superposed beam 2 comprises a prefabricated section and a cast-in-place section, the prefabricated section comprises a beam main body 12 and a bracket 11, the beam main body is a rectangular beam, the top surface of the rectangular beam is a plane, and the cast-in-place section is formed by casting concrete in place to the beam slab node area 3.
Example 4
As shown in fig. 4, the present embodiment is different from embodiment 2 in that: one side of the upper end of the superposed beam 2 is provided with a bracket 11 as a boundary beam, one side with the bracket 11 is a connecting side, the fully-prefabricated floor slab 1 is positioned at the connecting side of the superposed beam 2, a transverse rib of a floor slab gluten 8 extends into the beam slab node area 3, and a floor slab bottom rib 9 does not extend out of the connecting tongue-and-groove 7. The horizontal muscle of floor gluten 8 stretches into wherein from the 3 edges in the beam slab nodal region rather than the homonymy, and the tip that the horizontal muscle of floor gluten 8 stretches into beam slab nodal region 3 is close to 3 edges in the beam slab nodal region of offside and the anchor of buckling downwards.
The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or changed in other various forms without departing from the basic technical idea of the present invention.
Claims (10)
1. The utility model provides a support-free or few connection node of full precast floor slab and coincide roof beam that supports, includes full precast floor slab and coincide roof beam, form beam slab nodal region between full precast floor slab and the coincide roof beam, its characterized in that: and one side or two sides of the upper end of the superposed beam are provided with brackets, the end part of the full precast floor slab is provided with a connecting tongue-and-groove matched with the brackets, when the full precast floor slab and the superposed beam are assembled in place, the brackets are positioned in the connecting tongue-and-groove of the full precast floor slab, and a connecting node is formed by casting concrete in situ to a beam slab node area.
2. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 1, wherein: the composite beam comprises a prefabricated section and a cast-in-place section, the prefabricated section comprises a beam main body and a bracket, the beam main body is a rectangular beam, the top surface of the rectangular beam is a plane, and cast-in-place concrete is cast in a beam-slab node area to form the cast-in-place section, or the beam main body is a rectangular beam with a groove formed in the top surface, the groove extends along the length direction of the beam main body and is located in the beam-slab node area, and the cast-in-place concrete is cast in the beam-slab node area to form the cast-in-place section.
3. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 2, wherein: the prefabricated section is pre-buried to have fore-and-aft beam bottom muscle and beam hoop, the upper end of beam hoop extends beam slab node district, at the on-the-spot banding longitudinal beam gluten of beam slab node district, beam hoop embraces hoop beam gluten and beam bottom muscle.
4. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 3, wherein: the fully-prefabricated floor slab is pre-embedded with floor slab gluten and floor slab bottom ribs, and the floor slab gluten and the floor slab bottom ribs are respectively composed of longitudinal ribs and transverse ribs.
5. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 4, wherein: the beam stirrup is an open stirrup or a closed stirrup, the beam stirrup is located below the floor gluten, the beam gluten is located between the floor gluten and the floor bottom rib.
6. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 5, wherein: and the upper surface of the cast-in-place section of the superposed beam is flush with the upper surface of the full precast floor slab.
7. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 6, wherein: and a grout layer is additionally arranged between the top surface of the bracket and the top surface of the connecting tongue-and-groove.
8. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 7, wherein: the composite beam is used as a boundary beam, one side of the composite beam with the bracket is a connecting side, the full-prefabricated floor slab is positioned at the connecting side of the composite beam, the transverse ribs of the floor slab gluten extend into the beam slab joint area for anchoring, and the floor slab bottom ribs do not extend out of the connecting tongue-and-groove.
9. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 7, wherein: the composite beam with brackets on two sides is used as a middle beam, the fully-prefabricated floor slabs are positioned on two sides of the composite beam, transverse ribs of floor slab gluten of the fully-prefabricated floor slabs on two sides respectively extend into a beam slab joint area to be mutually lapped and anchored, and floor slab bottom ribs do not extend out of connecting tongues and grooves.
10. A connection node of a free-standing or less-standing fully precast floor slab and a superposed beam according to claim 8 or 9, wherein: the horizontal muscle of floor gluten stretches into wherein from the beam slab nodal region edge rather than the homonymy, just the tip that the horizontal muscle of floor gluten stretched into beam slab nodal region is close to the beam slab nodal region edge of offside and buckles the anchor.
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| CN202121437388.3U CN216109005U (en) | 2021-06-25 | 2021-06-25 | Support-free or few-support connection joint of full-prefabricated floor slab and superposed beam |
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| CN202121437388.3U CN216109005U (en) | 2021-06-25 | 2021-06-25 | Support-free or few-support connection joint of full-prefabricated floor slab and superposed beam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114737678A (en) * | 2022-05-10 | 2022-07-12 | 上海市机械施工集团有限公司 | Large-span prefabricated frame structure support-free structure and construction method |
| CN114837340A (en) * | 2022-04-27 | 2022-08-02 | 广东省交通规划设计研究院集团股份有限公司 | Prefabricated floor slab pitched roof structure, construction method and prefabricated floor slab |
| CN114991301A (en) * | 2022-05-17 | 2022-09-02 | 中建科技集团有限公司 | Assembly type reinforced concrete structural system free of mold and support and assembly method thereof |
| CN115573597A (en) * | 2022-11-02 | 2023-01-06 | 中铁建工集团有限公司 | Fully-assembled concrete canopy and construction method thereof |
| CN116677138A (en) * | 2023-07-29 | 2023-09-01 | 福建建工装配式建筑研究院有限公司 | Superposed beam structure based on precast beam plate units and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114837340A (en) * | 2022-04-27 | 2022-08-02 | 广东省交通规划设计研究院集团股份有限公司 | Prefabricated floor slab pitched roof structure, construction method and prefabricated floor slab |
| CN114837340B (en) * | 2022-04-27 | 2023-10-27 | 广东省交通规划设计研究院集团股份有限公司 | Precast floor sloping roof structure, construction method and precast floor |
| CN114737678A (en) * | 2022-05-10 | 2022-07-12 | 上海市机械施工集团有限公司 | Large-span prefabricated frame structure support-free structure and construction method |
| CN114991301A (en) * | 2022-05-17 | 2022-09-02 | 中建科技集团有限公司 | Assembly type reinforced concrete structural system free of mold and support and assembly method thereof |
| CN114991301B (en) * | 2022-05-17 | 2023-11-28 | 中建科技集团有限公司 | Mould-free and support-free assembled reinforced concrete structure system and assembling method thereof |
| CN115573597A (en) * | 2022-11-02 | 2023-01-06 | 中铁建工集团有限公司 | Fully-assembled concrete canopy and construction method thereof |
| CN115573597B (en) * | 2022-11-02 | 2023-08-15 | 中铁建工集团有限公司 | Fully-assembled concrete canopy and construction method thereof |
| CN116677138A (en) * | 2023-07-29 | 2023-09-01 | 福建建工装配式建筑研究院有限公司 | Superposed beam structure based on precast beam plate units and construction method thereof |
| CN116677138B (en) * | 2023-07-29 | 2023-10-31 | 福建建工装配式建筑研究院有限公司 | Superposed beam structure based on precast beam plate units and construction method thereof |
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