CN217231509U - Prestress tensioning top plate device - Google Patents
Prestress tensioning top plate device Download PDFInfo
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- CN217231509U CN217231509U CN202220463708.0U CN202220463708U CN217231509U CN 217231509 U CN217231509 U CN 217231509U CN 202220463708 U CN202220463708 U CN 202220463708U CN 217231509 U CN217231509 U CN 217231509U
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- tensioning
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- top plate
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Abstract
The utility model relates to the technical field of prestress tensioning, in particular to a prestress tensioning top plate device, which comprises a vertical top plate, wherein a transverse supporting plate is connected with the rear side of the vertical top plate; tensioning holes for the screw rods to pass through are formed in the vertical top plates on the two sides of the transverse supporting plate, and sliding parts are arranged at the bottoms of the transverse supporting plate and/or the vertical top plates; the utility model has the beneficial technical effects that: in the tensioning process, when the jack pushes the top plate device to move backwards, the friction force between the top plate device and the concrete surface of the beam body is reduced due to the action of the sliding piece, so that the stress loss is reduced, and the tensioning efficiency is improved; the stretch-draw hole of bar makes things convenient for the screw rod to install on vertical roof, and the cooperation has the preceding roof in bar stretch-draw hole, in case the axis between stretch-draw end and the stiff end appears when squinting, can also adjust the axis, avoids carbon fiber plate to damage and personnel injured's situation to take place.
Description
Technical Field
The utility model relates to a prestressing force stretch-draw technical field specifically is a prestressing force stretch-draw roof device.
Background
The principle of the prestress tension is that a prestress opposite to the load action is applied before the beam bears the load, when the beam bears the load, the load firstly counteracts the prestress, then the beam bears the force, mainly used to eliminate the unfavorable bending moment, make the structure in a better compression stress state, increase the large bearing capacity of the beam, and increase the span of the beam.
In the prior art, the method for reinforcing the beam body by using the prestressed tensioning carbon fiber plate is a common reinforcing technology, wherein a tensioning anchor generally comprises a fixed end and a tensioning end, and in the construction process, the carbon fiber plate and the anchor are accurately positioned and paid off. A fixed end anchoring seat and a stretching end anchoring seat are installed at two ends of the lower portion of a bridge, one end of a carbon fiber plate is connected to the fixed end anchoring seat, a high-strength screw, a gasket, a nut, a front top plate, a jack and a stretching top plate are sequentially installed on the stretching end anchoring seat, the telescopic end of the jack props against the front top plate, the rear end of the jack props against the stretching top plate, the front end of the high-strength screw is connected with the other end of the carbon fiber plate, the rear end of the high-strength screw penetrates through the front top plate and the stretching top plate and is screwed and limited at the outer end of the stretching top plate through a nut, the jack is adjusted to be tight in jacking, and the stress direction of the jack is enabled to be coincident with the central line of the carbon fiber plate. And (4) making protective measures, starting pretensioning, and uniformly coating carbon plate glue on the surface of the carbon fiber plate after pretensioning and unloading. And then, formally tensioning step by step, screwing the nut after tensioning is finished, removing the jack, and cutting off the overlong screw rod.
In the process of tensioning, in order to keep the axial line stable during tensioning and meet the requirement of bridge height limitation, the jack needs to be close to the concrete surface of the beam body as much as possible, so that a tensioning top plate at the rear end of the jack is easy to rub against the concrete of the beam body, the generated resistance causes stress loss, and the tensioning efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prestressing force stretch-draw roof device, it can reduce and the roof beam body between the frictional force, be favorable to improving stretch-draw efficiency.
In order to realize the purpose, the following technical scheme is provided:
a prestressed tensioning top plate device comprises a vertical top plate, wherein a transverse supporting plate is connected to the rear side of the vertical top plate; the vertical top plates on the two sides of the transverse supporting plate are provided with tensioning holes for the screw rods to pass through, and the bottom of the transverse supporting plate and/or the bottom of the vertical top plate are/is provided with sliding parts.
Preferably, one side of the transverse supporting plate is fixedly connected or hinged with the vertical top plate, and an inclined strut is connected between the transverse supporting plate and the vertical top plate.
Preferably, the bracing is the reinforcing plate, and the reinforcing plate is respectively with the top surface of horizontal backup pad and the trailing flank fixed connection of vertical roof.
Preferably, the front end of the transverse supporting plate is hinged with the vertical top plate, the inclined strut is a controllable telescopic piece, and two ends of the inclined strut are respectively connected with the transverse supporting plate and the vertical top plate.
Preferably, the tensioning holes are strip-shaped holes which are arranged transversely or vertically.
Preferably, more than one tensioning hole on each side of the vertical top plate is symmetrically arranged in the transverse direction and/or the vertical direction.
Preferably, the bottom both sides of vertical roof and the rear end of horizontal backup pad all are equipped with the holding tank, and the slider is installed in the holding tank respectively through the pivot.
The utility model discloses theory of operation and theory of use do: in the installation, install stiff end anchor seat and stretch-draw end anchor seat at bridge lower part both ends, install the screw rod that excels in proper order at stretch-draw end anchor seat, the gasket, the nut, preceding roof, the roof device in jack and this scheme, wherein make the slider in the vertical roof hug closely with roof beam body concrete, pass the back end of the screw rod that excels in the stretching hole on preceding roof and the vertical roof and screw up spacingly at the rear side of vertical roof through the nut, place the jack between preceding roof and vertical roof, the flexible end of jack withstands preceding roof, vertical roof is withstood to the back end. In the tensioning process, the flexible end of jack extends forward, under the reaction force, promotes the roof device in this scheme and moves backward, and the high strength screw rod is consequently backward stretch-draw carbon fiber plate.
The utility model has the beneficial technical effects that: 1. in the tensioning process, when the jack pushes the top plate device to move backwards, the friction force between the top plate device and the concrete surface of the beam body is reduced due to the action of the sliding piece, so that the stress loss is reduced, and the tensioning efficiency is improved; 2. a reinforcing plate is fixed between the transverse supporting plate and the vertical top plate, so that the structural strength of the top plate device is improved; 3. when the height of the axis where the tensioning hole is located on the front top plate and the rear vertical top plate is deviated, the height of the tensioning hole on the vertical top plate is adjusted through the telescopic inclined strut; 4. the stretch-draw hole of bar makes things convenient for the screw rod to install on vertical roof, and the cooperation has the preceding roof in bar stretch-draw hole, in case the axis between stretch-draw end and the stiff end appears when squinting, can also adjust the axis, avoids carbon fiber plate to damage and personnel injured's situation to take place.
Drawings
Fig. 1 is a schematic view of the use principle of the prestressed stretch-draw roof device of the present invention.
Figure 2 is a schematic structural view of the prestressed stretch-draw roof device of the present invention.
Figure 3 the utility model discloses two kinds of schematic diagrams of its structure of prestressing force stretch-draw roof device.
Figure 4 is a schematic view of three structures of the prestressed stretch-draw roof device of the present invention.
Figure 5 is a schematic view of four structures of the prestressed stretch-draw roof device of the present invention.
Fig. 6 is a schematic diagram of five structures of the prestressed stretch-draw roof device of the present invention.
In the figure: 1. a vertical top plate; 2. a transverse support plate; 3. stretching the hole; 4. a slider; 5. a reinforcing plate; 6. a controllable telescopic member; 7. accommodating grooves; 8. a beam body; 9. a fixed end anchoring seat; 10. a tension end anchoring seat; 11. a carbon fiber sheet; 12. a jack; 13. a high-strength screw; 14. a front top plate; 15. and a nut.
Detailed Description
The following describes the prestressed stretch-draw roof apparatus according to the present invention with reference to the accompanying drawings and embodiments.
A prestressed tensioning roof device comprises a vertical roof 1, wherein a transverse supporting plate 2 is connected to the rear side of the vertical roof 1; the vertical top plates 1 at two sides of the transverse supporting plate 2 are provided with tensioning holes 3 for the screw rods to pass through, and the bottom of the transverse supporting plate 2 and/or the vertical top plate 1 is provided with a sliding part 4.
As shown in fig. 1, in the installation process, a fixed end anchoring seat 9 and a tensioning end anchoring seat 10 are installed at two ends of the lower portion of a beam body 8, a high-strength screw 13, a gasket, a nut 15, a front top plate 14, a jack 12 and a top plate device in the scheme are sequentially installed on the tensioning end anchoring seat 10 according to the installation sequence, one end of a carbon fiber plate 11 is fixed on the fixed end anchoring seat 9 through an anchorage device, and the other end of the carbon fiber plate is fixedly connected with the high-strength screw 13 on the tensioning end anchoring seat 10 through an anchorage device. The top plate device is sleeved at the rear end of the high-strength screw 13 through a tensioning hole, the sliding piece 4 in the vertical top plate 1 is tightly attached to the concrete of the beam body 8, the rear end of the high-strength screw 13 penetrates through the tensioning holes 3 in the front top plate and the vertical top plate 1 and is screwed at the rear side of the vertical top plate 1 through nuts for limiting, the jack 12 is placed between the front top plate and the vertical top plate 1, the telescopic end of the jack 12 props against the front top plate 14, and the rear end props against the vertical top plate 1. In the tensioning process, the telescopic end of the jack 12 extends forwards, the top plate device in the scheme is pushed to move backwards under the reaction force, and the high-strength screw 13 stretches the carbon fiber plate 11 backwards along with the high-strength screw. Due to the action of the sliding piece, the friction force between the sliding piece and the concrete surface of the beam body is reduced, so that the stress loss is reduced, and the tensioning efficiency is improved.
In this embodiment, the vertical top plate 1 and the horizontal support plate 2 form a T-shaped structure, which is beneficial to saving materials and reducing weight. Tensioning hole 3 on vertical roof 1 is located the both sides of horizontal backup pad 2, can not be by horizontal backup pad 2 restriction height, is favorable to reducing the whole height of this scheme tensioning roof device, is favorable to satisfying bridge bottom limit for height designing requirement.
In one embodiment, the sliding member 4 is provided at the bottom of each of the lateral support plate 2 and the vertical top plate 1, and in another embodiment, the sliding member 4 is provided at the bottom of each of the lateral support plate 2 or the vertical top plate 1.
Further, as shown in fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, one side of the transverse support plate 2 is fixedly connected or hinged with the vertical top plate 1, and a diagonal brace is connected between the transverse support plate 2 and the vertical top plate 1 for supporting the transverse support plate 2 and the vertical top plate 1.
Further, as shown in fig. 2, fig. 3, fig. 4, and fig. 5, the inclined strut is a reinforcing plate 5, and the reinforcing plate 5 is fixedly connected to the top surface of the transverse supporting plate 2 and the rear side surface of the vertical top plate 1, respectively. In this embodiment, the reinforcing plate 5 is welded or integrally connected with the top surface of the transverse supporting plate 2 and the rear side surface of the vertical top plate 1 to form a stable support, so that the supporting effect is improved in the tensioning process. In this embodiment, there are two reinforcing plates 5, which are symmetrically fixed on two sides of the top of the lateral support plate 2, and the fixing manner can be welding or integral molding.
Further, the front end of the transverse supporting plate 2 is hinged to the vertical top plate 1, the inclined strut is a controllable telescopic piece 6, and two ends of the inclined strut are respectively connected with the transverse supporting plate 2 and the vertical top plate 1.
Because the aperture of the tensioning hole 3 is slightly larger than the diameter of the high-strength screw 13, in the tensioning process, in order to avoid the high-strength screw 13 from shaking in the tensioning hole 3 on the vertical top plate and the tensioning hole on the front top plate 14, and to cause the small-range deviation of the axes of the fixed end and the tensioning end in the height direction, the height of the tensioning hole 3 on the vertical top plate 1 is fixed or adjusted through the telescopic inclined strut; the damage of the carbon fiber plate 11 caused by the axis deviation and even the possible injury of the personnel can be avoided. The controllable telescopic part 6 can be a hydraulic telescopic rod or an electric telescopic rod. Two ends of the controllable telescopic piece 6 are respectively hinged with the vertical top plate 1 and the transverse supporting plate 2 through high-strength fixing lug structures. In one embodiment, as shown in fig. 6, the controllable telescopic member 6 is a hydraulic telescopic rod, and the supporting force is provided by hydraulic power for connecting the horizontal supporting plate 2 and the vertical top plate 1.
Further, the tensioning holes 3 are strip-shaped holes which are transversely or vertically arranged.
As shown in fig. 3 and 4, in order to adjust the axis in the horizontal direction between the stretching end and the fixed end, the vertical top plate 1 with the strip-shaped stretching hole 3 in the scheme is matched with the front top plate 14 with the strip-shaped stretching hole, so that the axis can be adjusted in the horizontal or vertical direction, and the situation that the carbon fiber plate 11 is damaged and personnel are injured when the axis between the stretching end and the fixed end deviates in the stretching process is avoided.
Furthermore, more than one tensioning hole 3 on each side of the vertical top plate 1 is arranged in the horizontal direction and/or the vertical direction symmetrically. Vertical roof 1 cooperation that has bar tensioning hole 3 in this scheme has preceding roof 14 of more than one tensioning hole 3, can fix high-strength screw 13 in different tensioning holes 3 according to the size model of carbon fiber plate 11 to adapt to more use scenes. As shown in fig. 5, two screw through holes are arranged on each side of the vertical top plate 1 in the horizontal direction.
Further, the bottom both sides of vertical roof 1 and the rear end of horizontal backup pad 2 all are equipped with holding tank 7, and slider 4 is installed in holding tank 7 respectively through the pivot.
As shown in fig. 2, 3, 4, 5, and 6, the sliding member 4 is installed in a slot manner, which facilitates processing, installation, and removal, and in this embodiment, the sliding member 4 is a roller or a rolling bearing.
Claims (9)
1. A prestressed tensioning roof plate device comprises a vertical roof plate (1), and is characterized in that a transverse support plate (2) is connected to the rear side of the vertical roof plate (1); the vertical top plates (1) on the two sides of the transverse supporting plate (2) are provided with tensioning holes (3) for the screw rods to pass through, and the bottom of the transverse supporting plate (2) and/or the vertical top plate (1) is provided with a sliding part (4).
2. The prestressed tensioning roof panel device according to claim 1, characterized in that one side of the transverse supporting plate (2) is fixedly connected or hinged with the vertical roof panel (1), and a diagonal brace is connected between the transverse supporting plate (2) and the vertical roof panel (1).
3. The prestressed tensioning roof panel device according to claim 2, characterized in that the bracing is a reinforcing plate (5), and the reinforcing plate (5) is fixedly connected to the top surface of the transverse supporting plate (2) and the rear side surface of the vertical roof panel (1), respectively.
4. The prestressed tensioning roof panel device according to claim 2, characterized in that the front end of the transverse supporting plate (2) is hinged to the vertical roof panel (1), the diagonal brace is a controllable telescopic member (6), and the two ends of the diagonal brace are respectively connected to the transverse supporting plate (2) and the vertical roof panel (1).
5. The prestressed tensioning roof slab device according to any one of claims 1 to 4, characterized in that the tensioning holes (3) are bar-shaped holes arranged transversely or vertically.
6. The prestressed tensioning roof panel installation according to any one of claims 1 to 4, characterized in that more than one tensioning opening (3) is provided on each side of the vertical roof panel (1) symmetrically in the transverse and/or vertical direction.
7. The prestressed tensioning roof panel apparatus as claimed in any one of claims 1 to 4, wherein both sides of the bottom of the vertical roof panel (1) and the rear end of the transverse supporting panel (2) are provided with receiving grooves (7), and the sliding members (4) are respectively mounted in the receiving grooves (7) through rotating shafts.
8. The prestressed tensioning roof plate device as claimed in claim 5, characterized in that both sides of the bottom of the vertical roof plate (1) and the rear end of the transverse supporting plate (2) are provided with receiving grooves (7), and the sliding members (4) are respectively mounted in the receiving grooves (7) through rotating shafts.
9. The prestressed tensioning roof plate device as claimed in claim 6, characterized in that both sides of the bottom of the vertical roof plate (1) and the rear end of the transverse supporting plate (2) are provided with receiving grooves (7), and the sliding members (4) are respectively mounted in the receiving grooves (7) through rotating shafts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220463708.0U CN217231509U (en) | 2022-03-03 | 2022-03-03 | Prestress tensioning top plate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220463708.0U CN217231509U (en) | 2022-03-03 | 2022-03-03 | Prestress tensioning top plate device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217231509U true CN217231509U (en) | 2022-08-19 |
Family
ID=82841480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220463708.0U Active CN217231509U (en) | 2022-03-03 | 2022-03-03 | Prestress tensioning top plate device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217231509U (en) |
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2022
- 2022-03-03 CN CN202220463708.0U patent/CN217231509U/en active Active
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