T-beam composite reinforcing device
By installing reinforcement units, carbon fiber board and polyurethane cement composite reinforcement materials on the T-beam of the old bridge, the problem of insufficient bending bearing capacity of the old bridge is solved, and the stability and bearing capacity of the bridge are significantly improved.
Patent Information
- Application Number
- CN202420514317.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-03-15
AI Technical Summary
There is a common problem of insufficient bending bearing capacity in existing reinforced concrete old bridges, resulting in structural damage and reduced load bearing capacity.
The T-beam composite reinforcement device is adopted, including reinforced T-beam, reinforcement units, carbon fiber board and polyurethane cement composite reinforcement material. The carbon fiber board is fixed by chemical bolts, and reinforcement materials and high-strength prestressed wire ropes are installed on the outside to form a stable structure.
It improves the overall stability and bearing capacity of the T-beam, extends the service life of the bridge, and solves the problem of insufficient bending bearing capacity.
Smart Images
Figure CN222700832U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge reinforcement equipment, and specifically relates to a T-beam composite reinforcement device. Background Art
[0002] During the long-term operation of a bridge, the material properties of the bridge itself continue to decline, coupled with the effects of the external environment and vehicle overload, which will cause various structural damages and reduce the bearing capacity. Currently, the existing old reinforced concrete bridges generally have the problem of insufficient bending bearing capacity. There are two reasons for this problem: first, the original design grade of the old bridge is low and cannot meet the current use requirements; second, the early construction methods and processes are not perfect, which have a certain impact on the bearing capacity of the completed bridge. Utility Model Content
[0003] The utility model aims to provide a T-beam composite reinforcement device, which solves the problem of decreased T-beam bearing capacity in the prior art.
[0004] The technical solution adopted by the utility model is a T-beam composite reinforcement device, comprising a reinforced T-beam, a reinforcement unit connected inside the reinforced T-beam, a carbon fiber plate connected to the horseshoe of the reinforced T-beam through a first chemical bolt, a reinforcement material is arranged on the side of the carbon fiber plate away from the reinforced T-beam, a plurality of connection holes are evenly opened in the reinforcement material along the length direction, and each connection hole is connected to both sides of the reinforced T-beam with a steel wire rope.
[0005] The utility model is also characterized in that:
[0006] The reinforcement unit includes a U-shaped steel plate, and a number of steel bars are evenly connected between the two opposite side walls of the U-shaped steel plate along its width direction. The two ends of the steel bars pass through the two side walls of the U-shaped steel plate respectively, and the closed side of the U-shaped steel plate is connected to the top plate of the reinforced T-beam through a second chemical bolt.
[0007] The carbon fiber plate wraps the horseshoe end of the reinforced T beam, and the reinforcement material wraps the carbon fiber plate.
[0008] The reinforcement materials are symmetrically arranged along the center line of the reinforced T-beam vertical column. The reinforcement materials on both sides of the center line of the reinforced T-beam vertical column are set to 8m, the thickness of the reinforcement material at the bottom of the carbon fiber plate is set to 5cm, and the height of the reinforcement materials on both sides of the carbon fiber plate is set to 15cm.
[0009] The reinforcement material is a polyurethane cement composite material, and the mass ratio of the raw materials is polyisocyanate: modified polyether polyol: cement = 1:1:2.
[0010] The thickness of the carbon fiber plate is 8mm.
[0011] The beneficial effect of the utility model is that the T-beam composite reinforcement device fixes the carbon fiber plate at the horseshoe of the T-beam by chemical bolts, arranges the polyurethane cement composite reinforcement material on the outside of the carbon fiber plate and reserves holes, tensions high-strength prestressed steel wire ropes in the reserved holes and anchors them on both sides of the beam ends to complete the reinforcement of the beam bottom, and strengthens the lateral connection of the bridge by arranging the reinforcement unit on the top of the beam, which can improve the overall stability of the T-beam and improve its bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model T-beam composite reinforcement device;
[0013] Figure 2 It is a structural schematic diagram of a reinforcement unit in the T-beam composite reinforcement device of the utility model.
[0014] In the figure, 1. connection hole, 2. reinforcement material, 3. first chemical bolt, 4. carbon fiber plate, 5. reinforcement unit, 51. second chemical bolt, 52. U-shaped steel plate, 53. steel bar, 6. asphalt pavement layer, 7. reinforced T-beam, 8. concrete pavement layer, 9. guardrail. DETAILED DESCRIPTION
[0015] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.
[0016] The utility model T beam composite reinforcement device, such as Figure 1 As shown, it includes a reinforced T-beam 7, a reinforcement unit 5 is connected inside the reinforced T-beam 7, a carbon fiber plate 4 is connected to the horseshoe of the reinforced T-beam 7 through a first chemical bolt 3, a reinforcing material 2 is arranged on the side of the carbon fiber plate 4 away from the reinforced T-beam 7, and the reinforcing material 2 is evenly provided with a number of connection holes 1 along its length direction, and each connection hole 1 is connected to both sides of the reinforced T-beam 7 by a steel wire rope. Guardrails 9 are installed at both ends of the reinforced T-beam 7, and a concrete pavement layer 8 and an asphalt pavement layer 6 are paved on the top plate of the reinforced T-beam 7 from bottom to top in sequence. The bottom of the horseshoe of the reinforced T-beam 7 is reinforced with a polyurethane cement composite reinforcement material 2 and a high-strength prestressed steel wire rope is tensioned to improve the bearing capacity and durability of the T-beam. The top of the beam is provided with a reinforcement unit 5 to strengthen the lateral connection of the bridge, which can improve the overall stability of the T-beam and its bearing capacity.
[0017] Example 1
[0018] The T-beam composite reinforcement device comprises a reinforced T-beam 7, a reinforcement unit 5 is connected inside the reinforced T-beam 7, a carbon fiber plate 4 is connected to the horseshoe of the reinforced T-beam 7 through a first chemical bolt 3, a reinforcing material 2 is arranged on the side of the carbon fiber plate 4 away from the reinforced T-beam 7, and the reinforcing material 2 is evenly provided with a plurality of connecting holes 1 along its length direction, and each connecting hole 1 is connected to both sides of the reinforced T-beam 7 by a steel wire rope.
[0019] like Figure 2 As shown, the reinforcement unit 5 includes a U-shaped steel plate 52, and a plurality of steel bars 53 are evenly connected between the two opposite side walls of the U-shaped steel plate 52 along the width direction thereof. The two ends of the steel bars 53 pass through the two side walls of the U-shaped steel plate 52 respectively, and the closed side of the U-shaped steel plate 52 is connected to the top plate of the reinforced T-beam 7 through the second chemical bolt 51. The steel bars 53 are HPB300 steel bars, and the number of the steel bars 53 is set to 4. The reinforcement unit 5 is set at an interval of 5m. When installing the reinforcement unit 5, firstly, the original concrete pavement layer 8 is chiseled off, and the sundries and dust are cleaned with a hair dryer. A layer of epoxy resin is brushed on the closed side of the U-shaped steel plate 52, and it is pasted on the top plate connection of the reinforced T-beam 7, and the second chemical bolt 51 is driven in. The two ends of the steel bars 53 are buried in the concrete pavement layer 8 to strengthen the lateral connection of the reinforced T-beam 7 and improve the overall stability of the beam.
[0020] The carbon fiber plate 4 wraps the horseshoe end of the reinforced T beam 7, and the reinforcing material 2 wraps the carbon fiber plate 4. The carbon fiber plate 4 is close to the horseshoe of the reinforced T beam 7, and then a mold is erected outside the carbon fiber plate 4 and a release agent is applied, and then the reinforcing material 2 is prepared and poured in the mold for reinforcement.
[0021] Example 2
[0022] The T-beam composite reinforcement device comprises a reinforced T-beam 7, a reinforcement unit 5 is connected inside the reinforced T-beam 7, a carbon fiber plate 4 is connected to the horseshoe of the reinforced T-beam 7 through a first chemical bolt 3, a reinforcing material 2 is arranged on the side of the carbon fiber plate 4 away from the reinforced T-beam 7, and the reinforcing material 2 is evenly provided with a plurality of connecting holes 1 along its length direction, and each connecting hole 1 is connected to both sides of the reinforced T-beam 7 by a steel wire rope.
[0023] The reinforcement unit 5 includes a U-shaped steel plate 52, and a number of steel bars 53 are evenly connected between the opposite side walls of the U-shaped steel plate 52 along its width direction. The two ends of the steel bars 53 pass through the two side walls of the U-shaped steel plate 52 respectively, and the closed side of the U-shaped steel plate 52 is connected to the top plate of the reinforced T-beam 7 through a second chemical bolt 51.
[0024] The carbon fiber plate 4 wraps the horseshoe end of the reinforced T-beam 7 , and the reinforcing material 2 wraps the carbon fiber plate 4 .
[0025] The reinforcement material 2 is symmetrically arranged along the center line of the vertical column of the reinforced T beam 7, the reinforcement material 2 on both sides of the center line of the vertical column of the reinforced T beam 7 is set to 8m, the thickness of the reinforcement material 2 at the bottom of the carbon fiber plate 4 is set to 5cm, and the height of the reinforcement material 2 on both sides of the carbon fiber plate 4 is set to 15cm. The reinforcement material 2 can generally be made at the bridge reinforcement site.
[0026] Example 3
[0027] The T-beam composite reinforcement device comprises a reinforced T-beam 7, a reinforcement unit 5 is connected inside the reinforced T-beam 7, a carbon fiber plate 4 is connected to the horseshoe of the reinforced T-beam 7 through a first chemical bolt 3, a reinforcing material 2 is arranged on the side of the carbon fiber plate 4 away from the reinforced T-beam 7, and the reinforcing material 2 is evenly provided with a plurality of connecting holes 1 along its length direction, and each connecting hole 1 is connected to both sides of the reinforced T-beam 7 by a steel wire rope.
[0028] The reinforcement unit 5 includes a U-shaped steel plate 52, and a number of steel bars 53 are evenly connected between the opposite side walls of the U-shaped steel plate 52 along its width direction. The two ends of the steel bars 53 pass through the two side walls of the U-shaped steel plate 52 respectively, and the closed side of the U-shaped steel plate 52 is connected to the top plate of the reinforced T-beam 7 through a second chemical bolt 51.
[0029] The carbon fiber plate 4 wraps the horseshoe end of the reinforced T-beam 7 , and the reinforcing material 2 wraps the carbon fiber plate 4 .
[0030] The reinforcing material 2 is symmetrically arranged along the center line of the vertical column of the reinforced T-beam 7. The reinforcing material 2 on both sides of the center line of the vertical column of the reinforced T-beam 7 is set to 8m, the thickness of the reinforcing material 2 at the bottom of the carbon fiber plate 4 is set to 5cm, and the height of the reinforcing material 2 on both sides of the carbon fiber plate 4 is set to 15cm.
[0031] Reinforcement material 2 is a polyurethane cement composite material, and the mass ratio of its raw materials is polyisocyanate: modified polyether polyol: cement = 1:1:2. When preparing reinforcement material 2, pour an appropriate amount of modified polyether polyol, catalyst, and flame retardant into a container and stir, then pour polyisocyanate and cement into the container according to the mix ratio, mix and stir thoroughly, and then pour the evenly mixed material into the mold and naturally cure for 24 hours. When pouring reinforcement material 2, construction is strictly prohibited on rainy days, and in order to completely isolate moisture, the cement must be dried on site.
[0032] The thickness of the carbon fiber plate 4 is 8 mm, which ensures that the bearing capacity of the horseshoe of the reinforced T beam 7 can be improved.
[0033] The reinforcement process of the utility model T-beam composite reinforcement device is as follows:
[0034] First, the carbonized concrete at the horseshoe of the reinforced T-beam 7 is chiseled out, and the horseshoe is rinsed with a high-pressure water gun after the chiseling is removed; after the concrete residue is rinsed clean, a carbon fiber plate 4 is tightly attached to the outside of the horseshoe and the first chemical bolt 3 is driven in to fix it; a mold is erected under the horseshoe and a mold release agent is applied; then a polyurethane cement composite reinforcement material 2 is configured, and the horseshoe is cast and reinforced, and then the reinforcement material 2 is subjected to natural curing treatment. After the material has formed strength, the mold is removed and checked to see if it meets the reinforcement requirements; a high-strength prestressed steel wire rope is used to anchor the ends of the reinforced T-beam 7 on both sides in the connecting hole 1; the concrete pavement layer 8 at the joint of the top plate of the reinforced T-beam 7 is chiseled out, and it is rinsed with a high-pressure water gun. After the rinsing is completed, a layer of epoxy resin is brushed on the closed side of the U-shaped steel plate 52, and a second chemical bolt 51 is driven in, and both ends of the steel bar 53 are buried in the concrete pavement layer 8; finally, the concrete pavement layer 8 and the asphalt pavement layer 6 are cast.
[0035] The utility model discloses a T-beam composite reinforcement device, in which a carbon fiber plate is fixed with chemical bolts at the horseshoe of the T-beam, a polyurethane cement composite reinforcement material is arranged on the outer side of the carbon fiber plate and a hole is reserved, a high-strength prestressed steel wire rope is tensioned in the reserved hole and anchored on both sides of the beam end, so as to complete the reinforcement of the beam bottom, and a groove steel is arranged on the beam top to strengthen the transverse connection of the bridge, so as to improve the overall stability of the T-beam and improve its bearing capacity.
Claims
1. T-beam composite reinforcement device, characterized in that: The invention comprises a reinforced T-beam (7), wherein a reinforcement unit (5) is connected inside the reinforced T-beam (7), a carbon fiber plate (4) is connected to the horseshoe of the reinforced T-beam (7) via a first chemical bolt (3), a reinforcing material (2) is provided on a side of the carbon fiber plate (4) away from the reinforced T-beam (7), the reinforcing material (2) is evenly provided with a plurality of connection holes (1) along its length direction, and each of the connection holes (1) is connected to both sides of the reinforced T-beam (7) by a steel wire rope.
2. The T-beam composite reinforcement device according to claim 1, characterized in that: The reinforcement unit (5) comprises a U-shaped steel plate (52), a plurality of steel bars (53) being evenly connected between two opposite side walls of the U-shaped steel plate (52) along its width direction, two ends of the steel bars (53) respectively passing through the two side walls of the U-shaped steel plate (52), and the closed side of the U-shaped steel plate (52) being connected to the top plate of the reinforced T-beam (7) via a second chemical bolt (51).
3. The T-beam composite reinforcement device according to claim 1, characterized in that: The carbon fiber plate (4) wraps the horseshoe end of the reinforced T-beam (7), and the reinforcing material (2) wraps the carbon fiber plate (4).
4. The T-beam composite reinforcement device according to claim 1, characterized in that: The reinforcing material (2) is symmetrically arranged along the center line of the vertical column of the reinforced T-beam (7), the reinforcing material (2) on both sides of the center line of the vertical column of the reinforced T-beam (7) is set to 8m, the thickness of the reinforcing material (2) at the bottom of the carbon fiber plate (4) is set to 5cm, and the height of the reinforcing material (2) on both sides of the carbon fiber plate (4) is set to 15cm.
5. The T-beam composite reinforcement device according to claim 1, characterized in that: The thickness of the carbon fiber plate (4) is 8 mm.