Structure externally wrapped with U-shaped steel for reinforcing floor prefabricated trough plate

Abstract

The utility model relates to the technical field of floor slab reinforcing structures, in particular to a structure for reinforcing a floor prefabricated trough plate by wrapping U-shaped steel, which comprises existing prefabricated trough plates and a U-shaped steel plate, the U-shaped steel plate is wrapped on rib beams adjacent to the two existing prefabricated trough plates, and the U-shaped steel plate is fixedly connected with the rib beams by penetrating chemical anchor bolts; a concrete overlapping layer is poured on the top of the existing prefabricated groove type plate, a reinforcing mesh is pre-embedded in the concrete overlapping layer, and through-wall steel bars penetrating through the original masonry bearing wall are pre-embedded in the connecting end of the concrete overlapping layer and the original masonry bearing wall. The existing prefabricated groove-shaped plates on the two sides separated by the original masonry bearing wall are connected and reinforced into continuous plates capable of transmitting tension and pressure through the through-wall steel bars and the concrete laminated layers. According to the structure, the integrity and the bearing capacity of the existing prefabricated concrete trough plate can be improved, the integrity of connection between the floor cover plate and the vertical wall body is improved by combining the plate surface reinforcing mesh laminated layer of the trough plate, and the existing floor slab and the wall body of a building do not need to be dismantled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of floor reinforcing structure, and specifically relates to a structure of U-shaped steel wrapped floor prefabricated channel-shaped plate. BACKGROUND

[0002] With the development of social economy, the state encourages the protection and renewal utilization of existing buildings in urban and rural areas from the policy, to avoid the disappearance of the original memory of the city caused by large-scale demolition and construction. The houses with brick-bearing wall structure built in different years, which inherit the Chinese Qin brick and Han tile tradition, need to be preserved. Due to the technical conditions at the time of construction, the floor slab of these brick wall houses is mostly prefabricated concrete slab, which has poor integrity and cannot meet the functional requirements of the reconstruction and utilization. Therefore, on the premise of not changing the original architectural style, the internal function of the house needs to be integrated and reconstructed, and the important content is structural reinforcement and seismic reinforcement.

[0003] The prefabricated concrete channel-shaped plate is a commonly used floor slab prefabricated component of existing brick wall houses. The cross section of the channel-shaped plate is usually a downward-opening groove structure, the two sides are rib beams, and the middle of the two ribs is a thin plate. The prefabricated floor slab of the original masonry structure has no connection between the prefabricated plates, low bearing capacity, poor integrity, and needs to improve the bearing capacity, integrity and seismic performance of the prefabricated plates in reinforcement. Therefore, a technology for reinforcing the prefabricated channel-shaped plate floor is needed. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a structure of U-shaped steel wrapped floor prefabricated channel-shaped plate, which can improve the integrity and bearing capacity of the existing prefabricated concrete channel-shaped plate, and improve the integrity of the connection between the floor slab and the vertical wall by combining the steel mesh overlay of the channel-shaped plate surface, without the need to demolish the existing floor slab and wall of the building.

[0005] The utility model is implemented by the following technical solutions:

[0006] The application discloses a structure of a prefabricated channel-shaped plate of a floor reinforced by an outer-wrapped U-shaped steel, which comprises existing prefabricated channel-shaped plates and U-shaped steel plates; when the existing prefabricated channel-shaped plates are paved, the rib beams of every two existing prefabricated channel-shaped plates are adjacent and close to each other; the U-shaped steel plates are wrapped on the adjacent rib beams of the two existing prefabricated channel-shaped plates; the U-shaped steel plates are fixedly connected with the rib beams through chemical anchor bolts; a concrete composite layer is poured on the top of the existing prefabricated channel-shaped plates; a steel mesh is embedded in the concrete composite layer; and a through-wall steel bar that penetrates through the original masonry bearing wall is embedded and arranged at the connecting end of the concrete composite layer and the original masonry bearing wall; the through-wall steel bar is arranged in a through-steel hole arranged on the original masonry bearing wall; and the two existing prefabricated channel-shaped plates separated by the original masonry bearing wall are connected and strengthened into a continuous plate capable of transmitting tensile stress and compressive stress through the through-wall steel bar and the concrete composite layer, so that the separated existing prefabricated channel-shaped plates are connected into an integral floor slab, and the integrity of the floor slab and the vertical wall is improved; before the concrete composite layer is poured, the through-steel hole is first arranged on the original masonry bearing wall at a position close to the surface of the existing prefabricated channel-shaped plate; the through-wall steel bar is connected with the steel mesh by penetrating through the through-steel hole; and finally, the concrete composite layer is poured.

[0007] Further preferably, a structural adhesive layer is coated between the U-shaped steel plate and the rib beam; after the U-shaped steel plate is wrapped on the rib beam and fixed, the structural adhesive is injected, and the structural adhesive is fully injected on the three contact surfaces between the U-shaped steel plate and the rib beam. Before the U-shaped steel plate is constructed, the U-shaped steel plate is processed after actual measurement, so as to ensure that the U-shaped steel plate is accurately processed; the existing prefabricated channel-shaped plate is on-site inspected, the surface layer of the rib beam is removed to the concrete body, and the U-shaped steel plate is constructed after the defects are repaired by fine stone concrete; the surface of the rib beam is ground by a grinding wheel to remove the plaster layer; the structural adhesive layer is filled between the U-shaped steel plate and the rib beam, the thickness of the structural adhesive layer is adjusted, the connection tightness of the U-shaped steel plate and the rib beam is improved, the connection integrity of the existing prefabricated channel-shaped plate is improved, and the bearing capacity is improved. The thickness and material of the U-shaped steel plate can be calculated and analyzed according to the requirement. The U-shaped steel plate is provided with a connecting bolt hole for mounting the chemical anchor bolt.

[0008] Further preferably, the original masonry bearing wall is provided with a concrete surface layer provided with a steel mesh on one side or two sides, and a through-wall connecting bar hole is arranged on the original masonry bearing wall, and a through-wall connecting bar for connecting the concrete surface layers is arranged in the through-wall connecting bar hole. When the original masonry bearing wall is provided with the concrete surface layers provided with the steel mesh on two sides, the through-wall connecting bar is arranged in the through-wall connecting bar hole arranged on the original masonry bearing wall, the two ends of the through-wall connecting bar are bent downward, and the through-wall connecting bar connects the concrete surface layers on the two sides to form a composite wall of steel mesh concrete+masonry+steel mesh concrete. The concrete surface layer provided with the steel mesh enhances the shearing strength of the original masonry bearing wall.

[0009] Further preferably, a series of channel steels are arranged on the outer side of the original masonry bearing wall, and the channel steels are connected in series with the through-wall steel bars. The through-wall steel bars are fixedly connected with the original masonry bearing wall, and the integrity of the floor slab and the vertical wall is improved.

[0010] The prefabricated channel-shaped plate structure of the outer-wrapped U-shaped steel reinforced floor has the following advantages:

[0011] 1. By wrapping the U-shaped steel plate on the rib beam of the existing prefabricated channel-shaped plate, the integrity and bearing capacity of the existing prefabricated concrete channel-shaped plate are improved, and the reinforcement work does not demolish the existing floor and wall of the building, which is safe and reliable.

[0012] 2. A concrete composite layer is poured on the top of the existing prefabricated channel-shaped plate, a steel mesh is embedded in the concrete composite layer, and a connecting reinforcing bar that connects the two sides of the concrete composite layer through the original masonry bearing wall is embedded in the connecting end of the concrete composite layer and the original masonry bearing wall, thereby enhancing the integrity and seismic performance of the entire floor plate.

[0013] 3. A reinforced concrete surface layer is provided on one side or both sides of the original masonry bearing wall, a panel wall connecting bar hole is provided on the concrete panel wall, a through-wall hole is provided in the masonry wall, and a panel wall connecting bar for connecting the reinforced concrete surface layers on both sides is provided in the hole, thereby enhancing the strength of the original masonry bearing wall. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic view of the connection structure of the prefabricated channel-shaped plate structure of the outer-wrapped U-shaped steel reinforced floor;

[0015] Figure 2 FIG. 2 is a top view of the structure; Figure 1

[0016] Figure 3 FIG. 3 is a schematic view of the cross-sectional structure of the connection between the U-shaped steel plate and the rib beam;

[0017] Figure 4 FIG. 4 is a schematic view of the cross-sectional structure of the concrete composite layer;

[0018] In the drawings, the component names corresponding to the serial numbers are as follows:

[0019] 1. original masonry bearing wall, 2. concrete surface layer, 3. through-wall connecting bar hole, 4. through-wall connecting bar, 5. U-shaped steel plate, 6. chemical anchor, 7. existing prefabricated channel-shaped plate, 8. concrete composite layer, 9. through-wall steel bar, 10. through-bar hole, 11. steel mesh, 12. structural adhesive layer, 13. rib beam, 14. series channel steel. DETAILED DESCRIPTION

[0020] The technical solutions in the utility model will be described clearly and completely in combination with the drawings and embodiments, and the described embodiments are only a part of the utility model, not all the embodiments.

[0021] Embodiment 1

[0022] As Figures 1-4 ​As shown, a structure of a prefabricated trough plate reinforced with U-shaped steel for floor is provided, comprising an existing prefabricated trough plate 7 and a U-shaped steel plate 5. When the existing prefabricated trough plate 7 is laid, the ribs 13 of each two existing prefabricated trough plates 7 are adjacent to each other; the U-shaped steel plate 5 is wrapped around the adjacent ribs 13 of the two existing prefabricated trough plates 7, and the U-shaped steel plate 5 and the ribs 13 are fixedly connected by passing chemical anchor bolts 6; a concrete superposition layer 8 is poured on the top of the existing prefabricated trough plate 7, and the prefabricated concrete superposition layer 8 is provided. A steel mesh 11 is embedded, and the connection end of the concrete superposition layer 8 and the original masonry load-bearing wall 1 is pre-embedded with through-wall steel bars 9 that pass through the original masonry load-bearing wall 1. The through-wall steel bars 9 are inserted into the through-rebar holes 10 set in the original masonry load-bearing wall 1. The existing prefabricated trough slabs 7 on both sides separated by the original masonry load-bearing wall 1 are connected and reinforced into a continuous slab that can transmit tension and pressure through the through-wall steel bars 9 and the concrete superposition layer 8. The separated existing prefabricated trough slabs 7 are also connected into an integral floor slab, thereby improving the integrity of the floor slab and the vertical wall. Before pouring the concrete superposition layer 8, through-rebar holes 10 are first drilled on the original masonry load-bearing wall 1 at the plate position close to the existing prefabricated trough slabs 7. The through-rebar holes 10 correspond to two 50mm holes drilled on the original masonry load-bearing wall 1 in the middle position of each existing prefabricated trough slab 7, and two 16mm through-rebars 9 with a length of 1.2 meters are inserted accordingly. The through-wall steel bars 9 are passed through the through-rebar holes 10 and connected to the steel mesh 11, and finally the concrete superimposed layer 8 is poured. The two ends of the U-shaped steel plate 5 extend to the side of the original masonry load-bearing wall 1, and a 10mm gap is reserved at the end.

[0023] like Figure 3 As shown, a structural adhesive layer 12 is applied between the U-shaped steel plate 5 and the rib beam 13; after the U-shaped steel plate 5 is wrapped around the rib beam 13 and fixed, structural adhesive is injected, and the three contact surfaces between the U-shaped steel plate 5 and the rib beam 13 are filled with structural adhesive. Before the construction of the U-shaped steel plate 5, the U-shaped steel plate 5 needs to be processed after actual measurement to ensure that the U-shaped steel plate 5 can be accurately processed. The existing prefabricated trough plate 7 needs to be inspected on site, and the surface layer of the rib beam 13 needs to be removed to the concrete body. If there are defects, it is necessary to repair them with C25 fine stone concrete before the U-shaped steel plate 5 is constructed; the surface of the rib beam 13 should be polished with a grinding wheel to remove the plaster layer, and the structural adhesive layer 12 is filled between the U-shaped steel plate 5 and the rib beam 13. The thickness of the structural adhesive layer 12 and the connection tightness of the U-shaped steel plate 5 and the rib beam 13 are adjusted to improve the connection integrity of the existing prefabricated trough plate 7 and its bearing capacity. The thickness and material of the U-shaped steel plate 5 can be adjusted according to the needs. The U-shaped steel plate 5 should be reserved with connection bolt holes for installing the chemical anchor bolts 6.

[0024] like Figure 1 、 Figure 2 and Figure 4As shown, the inner side of the original masonry load-bearing wall 1 is provided with a concrete surface layer 2 with a steel mesh. Through-wall connecting bar holes 3 are provided in the original masonry load-bearing wall 1. Through-wall connecting bar holes 3 are inserted into through-wall connecting bar holes 3 to connect the concrete surface layer 2. When the original masonry load-bearing wall 1 is provided with a concrete surface layer 2 with a steel mesh on both sides, through-wall connecting bar holes 3 are inserted into the through-wall connecting bar holes 3 provided in the original masonry load-bearing wall 1. The through-wall connecting bar 4 is bent downward at both ends. The through-wall connecting bar 4 connects the concrete surface layers 2 on both sides to form a composite wall structure of steel mesh concrete + masonry + steel mesh concrete. The concrete surface layer 2 with steel mesh enhances the shear strength of the original masonry load-bearing wall 1.

[0025] Example 2

[0026] The difference from Example 1 is that: Figure 1 As shown, a series channel steel 14 is provided on the outer side of the original masonry load-bearing wall 1 to connect multiple through-wall steel bars 9 in series.

[0027] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the scope of protection of the present invention.

Claims

1. A structure of prefabricated trough-shaped floor panels reinforced with U-shaped steel, comprising existing prefabricated trough-shaped panels (7), characterized in that: The invention also includes a U-shaped steel plate (5), wherein the U-shaped steel plate (5) is wrapped around the adjacent ribs (13) of two existing prefabricated trough plates (7), and the U-shaped steel plate (5) and the ribs (13) are fixedly connected by passing through chemical anchor bolts (6); a concrete superposition layer (8) is cast on the top of the existing prefabricated trough plates (7), a steel mesh (11) is pre-embedded in the concrete superposition layer (8), and a through-wall steel bar (9) passing through the original masonry load-bearing wall (1) is pre-embedded at the connection end between the concrete superposition layer (8) and the original masonry load-bearing wall (1), and the through-wall steel bar (9) is passed through the through-bar hole (10) provided in the original masonry load-bearing wall (1), and the existing prefabricated trough plates (7) on both sides separated by the original masonry load-bearing wall (1) are connected and reinforced by the through-wall steel bar (9) and the concrete superposition layer (8) to form a continuous plate capable of transmitting tension and pressure.

2. The structure of prefabricated floor trough plates reinforced with U-shaped steel as claimed in claim 1, characterized in that: A structural adhesive layer (12) is applied between the U-shaped steel plate (5) and the rib beam (13).

3. The structure of prefabricated floor trough plates reinforced with U-shaped steel as claimed in claim 1, characterized in that: The original masonry load-bearing wall (1) is provided with a concrete surface layer (2) with a steel mesh on one side or both sides, and a through-wall connecting rib hole (3) is provided on the original masonry load-bearing wall (1), and a through-wall connecting rib (4) for connecting the concrete surface layer (2) is passed through the through-wall connecting rib hole (3).

4. The structure of prefabricated floor trough plates reinforced with U-shaped steel as claimed in claim 1, characterized in that: The outer side of the original masonry load-bearing wall (1) is provided with a series of channel steels (14) connecting a plurality of through-wall steel bars (9) in series.

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