CN219011515U - Node structure of precast beam and precast slab - Google Patents
Node structure of precast beam and precast slab Download PDFInfo
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- CN219011515U CN219011515U CN202223549159.8U CN202223549159U CN219011515U CN 219011515 U CN219011515 U CN 219011515U CN 202223549159 U CN202223549159 U CN 202223549159U CN 219011515 U CN219011515 U CN 219011515U
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Abstract
The utility model belongs to the technical field of constructional engineering, and relates to a node structure of a precast beam and a precast slab, which comprises the following components: the utility model widens the lap joint width of the top part of the narrower precast beam, ensures the structural strength between the precast beam and the precast slab, and has high structural strength, safety and reliability at the beam slab node.
Description
Technical Field
The utility model belongs to the technical field of constructional engineering, and relates to a node structure of a precast beam and a precast slab.
Background
At present, two construction modes exist for reinforced concrete beams and plates: traditional cast-in-place and prefabricated assembly. The traditional cast-in-situ construction method has the defects of long construction period, poor construction quality, high environmental pollution degree and the like. Along with the great promotion of building industrialization in China, the prefabricated assembly is more and more important. The assembled frame structure can greatly improve the construction capacity and the construction speed, saves a great deal of labor force and ensures the construction quality. Therefore, the construction mode of prefabrication and assembly is increasingly widely applied to construction operations of reinforced concrete beams and plates.
However, when the width of the concrete precast beam designed and built is narrow, the portion where the bearing parts at the two ends of the precast slab overlap the concrete precast beam is correspondingly reduced, and a certain structural risk is brought to the node structure of the precast beam and the precast slab, so that a safer and more reliable node structure of the precast beam and the precast slab is required to solve the above problems.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: a node construction of a precast beam and a precast slab, comprising: the end part of the precast beam is pressed on the top surface of the precast beam, side flanges protruding laterally are symmetrically arranged on two sides of the precast beam along the length direction, an upward concave step-shaped groove is formed in the bottom surface of the end part of the precast slab, and the thickness of the groove is equal to that of the side flanges; a beam main rib along the vertical direction is arranged in the precast beam, and the end part of the beam main rib extends out of the upper surface of the precast beam; a plate main rib extending out of the side surface of the end part of the precast slab is arranged in the precast slab, the extending end of the beam main rib and the extending end of the plate main rib are mutually anchored, and concrete filler is filled in the anchoring part of the beam main rib and the plate main rib; during assembly, the end parts of the precast slabs are borne on the precast beams through the matching between the grooves and the side flanges, so that the weight of the precast slabs is transferred to the upper surface of the side flanges through the bottom surfaces of the grooves and then transferred to the precast beams to achieve the purpose of bearing, at the moment, the bottoms of the precast slabs are flush with the bottoms of the side flanges of the precast beams, then the precast slabs on two sides and the precast beam steel bars are anchored into a whole through the beam main bars and the slab main bars, and finally concrete fillers are poured in the groove formed by the end parts of the two precast slabs and the tops of the precast beams, so that the precast beams and the precast slabs are assembled, and the enough lap joint width can be provided for the precast slabs even if the precast beams are narrower in width, and the node strength requirements of the precast beams and the precast slabs are met.
Preferably, the extending ends of the beam main ribs and the extending ends of the plate main ribs are annular closed steel bar rings, and the extending ends of the beam main ribs and the extending ends of the plate main ribs are welded and anchored by adopting lapping ribs; the welding lap joint anchoring mode is more reliable and better in strength than the steel wire bundling lap joint or the bolt fastener lap joint.
Preferably, an expansion joint is reserved between the outer side wall of the side flanging and the inner side wall of the groove, and can prevent the internal stress influence on the joint caused by heat and cold contraction of the poured concrete filler in the groove formed by the end parts of the two precast slabs and the top of the precast beam.
More preferably, the expansion joint is filled with a foaming agent; the foaming agent can be used for blocking the expansion joint while buffering the prestress, so that the later-stage interior decoration is facilitated.
The beneficial effects of the utility model are as follows:
according to the utility model, the side flanging is arranged at the top of the precast beam so as to widen the lap joint width of the top of the narrower precast beam, so that the precast slab can have enough lap joint amount, meanwhile, the slab main ribs at the end parts of the precast slabs at the two sides are welded and lap-jointed with the beam main ribs of the precast beam, and concrete filler is filled at the lap joint part, so that the structural strength between the precast beam and the precast slab is ensured.
Drawings
FIG. 1 is a perspective cross-sectional elevation view of a node construction of a precast beam and a precast slab;
FIG. 2 is an exploded view of an assembly;
fig. 3 is an assembly-completed front view.
In the figure: 1. prefabricating a beam; 2. a prefabricated plate; 3. side flanging; 4. a groove; 5. a beam main rib; 6. a plate main rib; 7. a concrete filler; 8. an expansion joint; 9. and (3) a foaming agent.
Detailed Description
The following description of the related art will be made apparent to, and is not intended to limit the scope of, the embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, a node structure of a precast beam and a precast slab, includes: the precast beam 1 and precast slab 2, the tip of precast slab 2 bears on the top surface of precast beam 1, precast beam 1 along the both sides symmetry of length direction are equipped with the side flanging 3 of side projection, be equipped with concave stepped recess 4 on the tip bottom surface of precast slab 2, the thickness of recess 4 equals with the thickness of side flanging 3; a beam main rib 5 along the vertical direction is arranged in the precast beam 1, and the end part of the beam main rib 5 extends out of the upper surface of the precast beam 1; a main plate rib 6 along the horizontal direction is arranged in the precast slab 2, the main plate rib 6 extends out of the side surface of the end part of the precast slab 2, the extending end of the main beam rib 5 and the extending end of the main plate rib 6 are mutually anchored, and the anchoring part of the main beam rib 5 and the main plate rib 6 is filled with concrete filler 7; during assembly, the end parts of the precast slabs 2 are borne on the precast beams 1 through the matching between the grooves 4 and the side flanges 3, so that the weight of the precast slabs 2 is transferred to the upper surface of the side flanges 3 through the bottom surfaces of the grooves 4 and then transferred to the precast beams 1 to achieve the purpose of bearing, at the moment, the bottoms of the precast slabs 2 and the bottoms of the side flanges 3 of the precast beams 1 are flush, then the beam main ribs 5 and the slab main ribs 6 are anchored through the lapping ribs to enable the precast slabs 2 on two sides and the precast beams 1 to be anchored into a whole, and finally, concrete fillers 7 are poured into the groove formed by the end parts of the precast slabs 2 and the tops of the precast beams 1 to finish the assembly of the precast beams 1 and the precast slabs 2, so that the precast beams 1 and the precast beams 2 can still be provided with enough lapping widths even if the precast beams 1 are narrower in width, and the node strength requirements of the precast beams 1 and the precast slabs 2 are met.
Furthermore, the extending ends of the beam main ribs 5 and the extending ends of the plate main ribs 6 are annular closed steel bar rings, and the extending ends of the beam main ribs 5 and the extending ends of the plate main ribs 6 are welded and anchored by adopting lap bars; the welding lap joint anchoring mode is more reliable and better in strength than the steel wire bundling lap joint or the bolt fastener lap joint.
Further, an expansion joint 8 is reserved between the outer side wall of the side flanging 3 and the inner side wall of the groove 4, and can prevent the internal stress influence caused by heat and cold contraction of the pouring concrete filler 7 in the groove formed by the end parts of the two precast slabs 2 and the top of the precast beam 1.
Further, the expansion joint 8 is filled with a foaming agent 9; the foaming agent 9 can be used for blocking the expansion joint while buffering the prestress, so that the later-stage interior decoration is facilitated.
Examples
In the construction site of the building, the precast beam 1 is firstly arranged according to the design requirement, then the precast slab 2 is hoisted on the precast beam 1, and when the precast slab is assembled, the end part of the precast slab 2 is borne on the precast beam 1 through the cooperation between the groove 4 and the side flanging 3, so that the weight of the precast slab 2 is transmitted to the upper surface of the side flanging 3 through the bottom surface of the groove 4 and then transmitted to the precast beam 1 to achieve the purpose of bearing, and the bottom of the precast slab 2 is flush with the bottom of the side flanging 3 of the precast beam 1; then anchor beam main reinforcement 5 and board main reinforcement 6 through the welding of taking the muscle and make prefabricated plate 2 and prefabricated roof beam 1 reinforcing bar anchor of both sides become a whole, finally water concrete packing 7 in the groove that the tip of two prefabricated plates 2 and the top of prefabricated roof beam 1 constitute, accomplish the assembly of prefabricated roof beam 1 and prefabricated roof beam 2, guaranteed that even when prefabricated roof beam 1 width is narrower still can provide sufficient overlap joint width for prefabricated plate 2, satisfy the node strength requirement of prefabricated roof beam 1 and prefabricated plate 2.
In summary, the utility model provides a node structure of a precast beam and a precast slab, which widens the overlap width of the top of a narrower precast beam by arranging side flanges at the top of the precast beam, so that the precast slab can have enough overlap amount, meanwhile, the slab main ribs at the end parts of the precast slab at two sides are welded and overlapped with the beam main ribs of the precast beam, and concrete filler is filled at the overlapped part, thereby ensuring the structural strength between the precast beam and the precast slab.
It is emphasized that: the above embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (4)
1. A node construction of a precast beam and a precast slab, comprising: precast beam (1) and prefabricated board (2), its characterized in that: the end part of the precast slab (2) is pressed on the top surface of the precast beam (1), lateral protruding side flanges (3) are symmetrically arranged on two sides of the precast beam (1) along the length direction, an upward concave step-shaped groove (4) is formed in the bottom surface of the end part of the precast slab (2), and the thickness of the groove (4) is equal to that of the side flanges (3);
a beam main rib (5) along the vertical direction is arranged in the precast beam (1), and the end part of the beam main rib (5) extends out of the upper surface of the precast beam (1); be equipped with in prefabricated plate (2) along horizontal direction's board owner muscle (6), the tip side of prefabricated plate (2) is stretched out to board owner muscle (6), the end that stretches out of roof beam owner muscle (5) anchor each other with the end that stretches out of board owner muscle (6), the anchor department of roof beam owner muscle (5) and board owner muscle (6) is filled with concrete filler (7).
2. The node structure of the precast beam and the precast slab according to claim 1, wherein the extending ends of the beam main ribs (5) and the extending ends of the slab main ribs (6) are annular closed steel bar rings, and the extending ends of the beam main ribs (5) and the extending ends of the slab main ribs (6) are welded and anchored by adopting lap bars.
3. The node structure of a precast beam and a precast slab according to claim 1, wherein an expansion joint (8) is reserved between the outer side wall of the side flange (3) and the inner side wall of the groove (4).
4. A precast beam and precast slab node construction according to claim 3, characterized in that the expansion joint (8) is filled with a foaming agent (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223549159.8U CN219011515U (en) | 2022-12-29 | 2022-12-29 | Node structure of precast beam and precast slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223549159.8U CN219011515U (en) | 2022-12-29 | 2022-12-29 | Node structure of precast beam and precast slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219011515U true CN219011515U (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223549159.8U Active CN219011515U (en) | 2022-12-29 | 2022-12-29 | Node structure of precast beam and precast slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219011515U (en) |
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2022
- 2022-12-29 CN CN202223549159.8U patent/CN219011515U/en active Active
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