Prefabricated slab reinforcing device based on UHPC (Ultra High Performance Concrete) and steel plate

Abstract

The utility model discloses a precast slab reinforcing device based on UHPC and a steel plate, and belongs to the technical field of precast slab reinforcing. The prefabricated slab reinforcing device based on the UHPC and the steel plate comprises the steel plate used for being pasted to the bottom of a prefabricated slab, and further comprises angle steel and a reinforcing plate, the angle steel comprises a horizontal part and a vertical part, the horizontal part is fixedly connected with the edge of the bottom face of the steel plate, and a penetrating hole is formed in the vertical part; the anchoring part penetrates through the through hole and is fixed on the wall body, and the end part of the anchoring part is connected with the vertical part; the anchoring part comprises a screw rod and a through hole penetrating into the wall body, meanwhile, the two side faces of the wall body are each provided with an angle steel, and the end of the screw rod penetrates into a through hole formed in the vertical part. The steel plate is easy to fall off, and the effect of reinforcing the prefabricated slab cannot be achieved.

Description

Technical Field

[0001] This utility model relates to the field of precast slab reinforcement technology, specifically to a precast slab reinforcement device based on UHPC and steel plate. Background Technology

[0002] Precast slabs are floor slabs used in construction. They are typically precast concrete components manufactured and processed in a prefabrication plant and then transported directly to the construction site for installation.

[0003] In the construction industry, precast slab buildings are typically reinforced by bonding carbon fiber cloth or steel plates to the underside of precast floor slabs. This reinforcement process relies on adhesives to provide the load-bearing capacity after reinforcement. Since the adhesive quality needs to be checked every 5-8 years after reinforcement, and if the adhesive fails, reinforcement must be repeated, resulting in significant manpower and time costs. Furthermore, the reinforcement method using carbon fiber cloth or bonded steel plates requires the tensile strength of the bonding surface on the precast slab to reach at least 1.5 MPa to achieve the desired effect. However, most existing precast slabs have low strength, and the tensile strength of the bonding surface does not reach 1.5 MPa. Therefore, the bonded carbon fiber cloth or steel plates cannot fully function after reinforcement. Utility Model Content

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a precast slab reinforcement device based on UHPC and steel plate. This avoids the problems of poor bonding effect, easy detachment of steel plate and failure to achieve reinforcement effect of precast slab caused by simply pasting carbon fiber cloth or steel plate to the bottom of the precast slab.

[0005] This utility model provides a precast slab reinforcement device based on UHPC and steel plate, including a steel plate for bonding to the bottom of the precast slab, and the precast slab reinforcement device further includes:

[0006] Angle steel, comprising a horizontal part and a vertical part, wherein the horizontal part is fixedly connected to the bottom edge of the steel plate, and the vertical part is provided with a through hole;

[0007] An anchor, passing through the perforation and fixed to the wall, the end of the anchor being connected to the vertical part.

[0008] This precast slab reinforcement device uses anchors to firmly fix angle steel to the wall. At the same time, the angle steel is fixedly connected to the end of the steel plate. The angle steel not only supports the steel plate, but also ensures that the steel plate is tightly bonded to the bottom of the precast slab. This avoids the problems of poor bonding effect, easy steel plate detachment, and failure to strengthen the precast slab caused by the existing method of simply pasting carbon fiber cloth or steel plate to the bottom of the precast slab.

[0009] In practical use, the plaster layer on the bottom surface of the precast slab is removed, and then ultra-high performance concrete is initially applied to the bottom surface of the precast slab. The steel plate is then pasted onto the bottom surface of the precast slab with ultra-high performance concrete. Angle steel is then fixed to the wall with anchors so that the angle steel and the steel plate are in contact. The angle steel and the steel plate are then welded together to complete the purpose of fixing the steel plate to the bottom surface of the precast slab. After the above operations are completed, ultra-high performance concrete is applied again to the surface of the angle steel and the steel plate to form a protective layer.

[0010] Since the steel plate has multiple edges, angle steel and anchors are installed at least on the two opposite bottom edges of the steel plate. The two precast plate reinforcement devices stretch the steel plate on both sides at the same time, making the steel plate taut. This avoids the problem of the steel plate sagging and deforming in the middle due to gravity, which would cause the upper surface of the steel plate to separate from the lower surface of the precast plate, thus increasing the reinforcement effect.

[0011] Preferably, the anchor includes:

[0012] The screw rod is inserted into the through hole in the wall, and an angle iron is installed on both sides of the wall. The end of the screw rod is inserted into the through hole in the vertical part.

[0013] Two nuts are threaded to both ends of the screw rod and are used to fix two angle steels to the wall.

[0014] Each end of the same screw has an angle steel. By tightening the nuts at both ends of the screw, the two angle steels can be fixed to the wall. To increase the stability of the nuts and angle steels, the construction workers can add nuts to the ends of the screw according to the actual site conditions to prevent a single nut from loosening.

[0015] Preferably, the end face of the horizontal part is provided with an I-shaped groove, the I-shaped groove is connected to the upper surface of the horizontal part, an I-shaped slide plate is slidably disposed in the I-shaped groove, the upper surface of the I-shaped slide plate is used to connect with the lower surface of the steel plate, the lower surface of the horizontal part is provided with a first threaded hole, a first screw is threaded into the first threaded hole, and the end of the first screw abuts against the I-shaped slide plate to restrict the I-shaped slide plate within the I-shaped groove.

[0016] Due to the dimensional errors in the building, there is a discrepancy between the cut steel plate and the actual wall size. In order to prevent the steel plate size from being smaller than the bottom size of the precast slab, which would cause the edge of the steel plate to not be able to contact the angle steel, the above structure was designed.

[0017] When using, loosen the first screw, pull out the I-shaped sliding plate so that the I-shaped sliding plate coincides with the lower surface of the steel plate, and then tighten the first screw. The I-shaped sliding plate and the steel plate can be welded together for fixation. When using the first screw, a spring washer is used to prevent the first screw from loosening.

[0018] In fact, there are two first threaded holes on the horizontal part, located on the left and right sides of the horizontal part respectively. The purpose is to make the two first screws and the screw rod on the horizontal part misaligned to prevent interference and facilitate installation.

[0019] Preferably, the lower end face of the vertical part is provided with a first sliding groove, the middle part of the first sliding groove is connected to the two sides of the vertical part, a first sliding plate is slidably disposed in the first sliding groove, and the perforation is provided on the first sliding plate.

[0020] Because the through holes drilled in the wall have vertical displacement errors and tilt angle errors, the screw inside the through hole is not easy to pass through the hole in the vertical part. Passing through the through hole will also cause problems with the angle steel and steel plate not fitting together. Therefore, the above structure was designed.

[0021] After inserting the screw rod through the through hole, first fit the through hole on the first slide plate onto the screw rod, and then move the angle steel up and down so that the horizontal part of the angle steel abuts against the steel plate.

[0022] Preferably, a limiting plate is fixedly provided on the lower end face of the vertical part, the limiting plate is provided with a central screw hole, a second screw is fitted in the central screw hole, and the end of the second screw is rotatably connected to the first sliding plate.

[0023] The limiting plate has through holes on both sides, and the lower end face of the vertical part has side threaded holes on both sides. The third screw 16 passes through the through holes and is threaded into the side threaded holes, so that the limiting plate is fixed to the lower end face of the vertical part.

[0024] The first slide plate has a groove, and a bearing is installed in the groove. The outer ring of the bearing is fixedly connected to the inner wall of the groove, and the inner ring of the bearing is fixedly connected to the end of the second screw. The height position between the angle steel and the screw can be adjusted by rotating the second screw.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] This precast slab reinforcement device uses anchors to firmly fix angle steel to the wall. At the same time, the angle steel is fixedly connected to the end of the steel plate. The angle steel not only supports the steel plate, but also ensures that the steel plate is tightly bonded to the bottom of the precast slab. This avoids the problems of poor bonding effect, easy steel plate detachment, and failure to strengthen the precast slab caused by the existing method of simply pasting carbon fiber cloth or steel plate to the bottom of the precast slab. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the present invention.

[0028] Figure 2 This is a diagram showing the usage status of angle steel;

[0029] Figure 3 This is a schematic diagram of angle steel;

[0030] Figure 4 This is a schematic diagram of an I-shaped skateboard;

[0031] Figure 5 This is a schematic diagram of the first screw;

[0032] Figure 6 This is a diagram showing the usage status of the first skateboard;

[0033] Figure 7 This is a schematic diagram showing the location of the first chute;

[0034] Figure 8 This is a schematic diagram of the first skateboard structure;

[0035] Figure 9 This is a schematic diagram of the second screw;

[0036] Figure 10 This is a schematic diagram of the model of this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Precast slab, 2. Steel plate, 3. Angle steel, 4. Perforation, 5. Anchor, 6. Wall, 7. Screw, 8. Nut, 9. I-shaped sliding plate, 10. First threaded hole, 11. First screw, 12. First slide groove, 13. First sliding plate, 14. Limiting plate, 15. Second screw, 16. Third screw, 17. Bearing, 18. I-shaped slide groove. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. Words such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “inner,” “outer,” “upper,” “lower,” “far,” “near,” “front,” and “back” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The accompanying drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0042] First embodiment

[0043] This utility model provides a precast slab reinforcement device based on UHPC and steel plate, such as... Figure 1-3 The precast slab reinforcement device includes a steel plate 2 for attaching to the bottom of the precast slab 1, and further includes:

[0044] Angle steel 3 includes a horizontal part and a vertical part. The horizontal part is fixedly connected to the bottom edge of the steel plate 2, and the vertical part is provided with a through hole 4.

[0045] Anchor 5 passes through the perforation 4 and is fixed to the wall 6, with the end of the anchor 5 connected to the vertical part.

[0046] This precast slab reinforcement device uses anchors 5 to firmly fix angle steel 3 to the wall. At the same time, angle steel 3 is fixedly connected to the end of steel plate 2. Angle steel 3 not only supports steel plate 2, but also ensures that steel plate 2 is tightly bonded to the bottom of precast slab 1. This avoids the problems of poor bonding effect, easy detachment of steel plate 2, and failure to achieve reinforcement effect of precast slab 1 caused by simply pasting carbon fiber cloth or steel plate 2 to the bottom of precast slab 1.

[0047] In practical use, the plaster layer on the bottom surface of the precast slab 1 is removed, and then ultra-high performance concrete is initially applied to the bottom surface of the precast slab 1. The steel plate 2 is then attached to the bottom surface of the precast slab 1 with ultra-high performance concrete. Then, the angle steel 3 is fixed to the wall using anchors 5, so that the angle steel 3 is in contact with the steel plate 2. The angle steel 3 and the steel plate 2 are then welded together to complete the purpose of fixing the steel plate 2 to the bottom surface of the precast slab 1. After the above operations are completed, ultra-high performance concrete is applied again to the surface of the angle steel 3 and the steel plate 2 to form a protective layer.

[0048] The steel plate 2 has multiple edges, so at least two opposite bottom edges of the steel plate 2 are provided with angle steel 3 and anchors 5. The two precast plate reinforcement devices stretch the steel plate 2 on both sides at the same time, so that the steel plate 2 is tensioned, avoiding the problem that the middle position of the steel plate 2 will sag and deform due to the gravity of the steel plate 2, causing the upper surface of the steel plate 2 to separate from the lower surface of the precast plate 1, thus increasing the reinforcement effect.

[0049] In this embodiment, as Figure 1 The anchor 5 includes:

[0050] The screw 7 is inserted into the through hole on the wall 6. At the same time, an angle steel 3 is provided on both sides of the wall 6, and the end of the screw 7 is inserted into the through hole 4 on the vertical part.

[0051] Two nuts 8 are threaded to both ends of the screw rod 7, and are used to fix the two angle steels 3 to the wall 6.

[0052] Each end of the same screw rod 7 has an angle steel 3. By tightening the nuts 8 at both ends of the screw rod 7, the two angle steels 3 can be fixed to the wall. In order to increase the stability of the nuts and angle steels 3, the construction personnel can add nuts 8 at the end of the screw rod 7 according to the actual site conditions to prevent a single nut 8 from loosening.

[0053] In this embodiment, as Figure 1-5 The end face of the horizontal part is provided with an I-shaped groove 18, which is connected to the upper surface of the horizontal part. An I-shaped slide plate 9 is slidably disposed in the I-shaped groove 18. The upper surface of the I-shaped slide plate 9 is used to connect with the lower surface of the steel plate 2. The lower surface of the horizontal part is provided with a first threaded hole 10, and a first screw 11 is threaded into the first threaded hole 10. The end of the first screw 11 abuts against the I-shaped slide plate 9 to restrict the I-shaped slide plate 9 within the I-shaped groove 18.

[0054] Due to the error in the building's dimensions, there is a discrepancy between the cut steel plate 2 and the actual wall dimensions. In order to prevent the steel plate 2 from being smaller than the bottom dimensions of the precast slab 1, which would cause the edge of the steel plate 2 to not be able to contact the angle steel 2, the above structure is designed.

[0055] In use, loosen the first screw 11, pull out the I-shaped slide plate 9 so that the I-shaped slide plate 9 coincides with the lower surface of the steel plate 2, and then tighten the first screw 11. The I-shaped slide plate 9 and the steel plate 2 can be welded together for fixation. When using the first screw 11, the first screw 11 is equipped with a spring washer to prevent the first screw 11 from loosening.

[0056] In fact, there are two first threaded holes 10 on the horizontal part, located on the left and right sides of the horizontal part respectively. The purpose is to make the two first screws 11 and screw 7 on the horizontal part misaligned to prevent interference and facilitate installation.

[0057] In this embodiment, as Figure 6-10 The lower end face of the vertical part is provided with a first sliding groove 12, the middle part of the first sliding groove 12 connects the two sides of the vertical part, a first sliding plate 13 is slidably disposed in the first sliding groove 12, and the perforation 4 is provided on the first sliding plate 13.

[0058] Because the through hole drilled in the wall 6 has vertical displacement error and tilt angle error, the screw 7 in the through hole is not easy to pass through the through hole 4 on the vertical part. Passing through the through hole 4 will also cause problems with the angle steel 3 and the steel plate 2 not being able to fit together. Therefore, the above structure is designed.

[0059] After the screw 7 is inserted into the through hole, the through hole 4 on the first slide plate 13 is first fitted onto the screw 7, and then the angle steel 3 is moved up and down so that the horizontal part of the angle steel 3 abuts against the steel plate 2.

[0060] In this embodiment, as Figure 6 A limiting plate 14 is fixedly provided on the lower end face of the vertical part. A central screw hole is provided on the limiting plate 14. A second screw 15 is fitted in the central screw hole, and the end of the second screw 15 is rotatably connected to the first slide plate 13.

[0061] The limiting plate 14 has through holes on both sides, and the lower end face of the vertical part has side threaded holes on both sides. The third screw 16 passes through the through holes and is threaded into the side threaded holes, so that the limiting plate 14 is fixed to the lower end face of the vertical part.

[0062] The first slide plate 13 has a groove, and a bearing 17 is installed in the groove. The outer ring of the bearing 17 is fixedly connected to the inner wall of the groove, and the inner ring of the bearing 17 is fixedly connected to the end of the second screw 15. The height position between the angle steel 3 and the screw 7 can be adjusted by rotating the second screw 15.

[0063] The method of using the precast slab reinforcement device based on UHPC and steel plate according to this utility model is as follows:

[0064] First, remove the plaster layer from the bottom surface of precast slab 1. Then, apply ultra-high performance concrete to the bottom surface of precast slab 1. Finally, attach steel plate 2 to the bottom surface of precast slab 1, which is coated with ultra-high performance concrete.

[0065] Then, a screw 7 is inserted into the through hole, and the two ends of the screw 7 are respectively inserted into the through holes 4 on the first sliding plate 13. The second screw 15 is adjusted so that the horizontal part of the angle steel 3 abuts against the steel plate 2.

[0066] Next, loosen the first screw 11, pull out the I-shaped slide plate 9 so that the surface of the I-shaped slide plate 9 overlaps with the surface of the steel plate 2, and tighten the first screw 11;

[0067] Finally, tighten nut 8, apply ultra-high performance concrete to the surfaces of angle steel 3 and steel plate 2 to form a protective layer, and the process is complete.

[0068] This precast slab reinforcement device uses anchors 5 to firmly fix angle steel 3 to the wall. At the same time, angle steel 3 is fixedly connected to the end of steel plate 2. Angle steel 3 not only supports steel plate 2, but also ensures that steel plate 2 is tightly bonded to the bottom of precast slab 1. This avoids the problems of poor bonding effect, easy detachment of steel plate 2, and failure to achieve reinforcement effect of precast slab 1 caused by simply pasting carbon fiber cloth or steel plate 2 to the bottom of precast slab 1.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precast slab reinforcement device based on UHPC and steel plate, comprising a steel plate (2) for bonding to the bottom of the precast slab (1), characterized in that, The precast slab reinforcement device also includes: Angle steel (3) includes a horizontal part and a vertical part. The horizontal part is fixedly connected to the bottom edge of the steel plate (2), and the vertical part is provided with a through hole (4). An anchor (5) passes through the perforation (4) and is fixed to the wall (6), with the end of the anchor (5) connected to the vertical part; The end face of the horizontal part is provided with an I-shaped groove (18); the precast slab reinforcement device based on UHPC and steel plate also includes an I-shaped sliding plate (9) and a first screw (11). The I-shaped sliding plate (9) is slidably disposed in the I-shaped sliding groove (18), the I-shaped sliding plate (9) is connected to the lower plate surface of the steel plate (2), and the lower surface of the horizontal part is provided with a first threaded hole (10). The first screw (11) is threaded into the first threaded hole (10) to abut and restrain the I-shaped slide plate (9).

2. The precast slab reinforcement device based on UHPC and steel plate as described in claim 1, characterized in that, The anchor (5) includes: The screw (7) is inserted into the through hole on the wall (6), and an angle steel (3) is provided on both sides of the wall (6), and the end of the screw (7) is inserted into the through hole (4) on the vertical part; Two nuts (8) are threaded to the two ends of the screw rod (7) respectively, and are used to fix the two angle steels (3) to the wall (6).

3. The precast slab reinforcement device based on UHPC and steel plate as described in claim 1, characterized in that, The lower end face of the vertical part is provided with a first sliding groove (12), the middle part of the first sliding groove (12) connects the two sides of the vertical part, a first sliding plate (13) is slidably disposed in the first sliding groove (12), and the perforation (4) is provided on the first sliding plate (13).

4. The precast slab reinforcement device based on UHPC and steel plate as described in claim 3, characterized in that, A limiting plate (14) is fixedly provided on the lower end face of the vertical part. A central screw hole is provided on the limiting plate (14). A second screw (15) is fitted in the central screw hole, and the end of the second screw (15) is rotatably connected to the first slide plate (13).

5. The precast slab reinforcement device based on UHPC and steel plate as described in claim 1, characterized in that, There are two first threaded holes (10), located on the left and right sides of the horizontal part respectively, and each first threaded hole (10) is fitted with a first screw (11).

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