Novel gate pier structure based on prestress of carbon fiber cloth

Abstract

The utility model is applicable to the technical field of hydraulic engineering buildings, and provides a novel gate pier structure based on carbon fiber cloth prestress, which comprises a gate pier, a carbon fiber cloth, a carbon fiber cloth and a carbon fiber cloth, the carbon fiber cloth is embedded in the gate pier, and a steering circular steel pipe used for changing the trend of the carbon fiber cloth is arranged in the gate pier; the bracket is provided with an anchorage device, the two ends of the carbon fiber cloth are exposed, extend to the bracket and are fixed to the anchorage device, through the pre-buried tensioning technology of the carbon fiber cloth and the synergistic effect of the steering round steel pipe and the anchorage device, the prestress loss is reduced to 8%-12%, and the construction efficiency is improved by 40%; and the anti-aging coating obviously prolongs the service life of the structure, and is particularly suitable for tensile stress scenes of high-water-pressure gate piers.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering construction technology, specifically a novel gate pier structure based on carbon fiber prestressing. Background Technology

[0002] Traditional prestressed gate piers use steel strand anchor cables, which mostly have the following drawbacks:

[0003] 1. The steering mechanism is complex and requires additional concrete protrusions, which leads to stress concentration;

[0004] 2. The anchoring area is prone to corrosion, and the protective layer has a lifespan of less than 10 years;

[0005] 3. Construction positioning relies on temporary supports, resulting in poor accuracy.

[0006] Existing technologies attempt to replace steel strands with FRP reinforcement, but this does not solve the problem of low efficiency in steering structures. Therefore, there is an urgent need to provide a novel gate pier structure based on carbon fiber prestressing to overcome the shortcomings in current practical applications. Utility Model Content

[0007] The purpose of this invention is to provide a novel gate pier structure based on carbon fiber prestress, aiming to solve the problems mentioned in the background art.

[0008] This utility model is implemented as follows: a novel gate pier structure based on carbon fiber prestressing, comprising:

[0009] Gate pier, the bottom of which is provided with reserved holes for construction positioning;

[0010] Carbon fiber cloth, which is embedded inside the gate pier, and a steering round steel pipe is installed inside the gate pier to change the direction of the carbon fiber cloth.

[0011] And a cow leg, which has an anchor, with both ends of the carbon fiber cloth exposed and extending to the cow leg and fixed to the anchor.

[0012] As a further embodiment of this invention: the surface of the carbon fiber cloth is coated with a primer and an anti-aging coating.

[0013] As a further aspect of this utility model, the primer is an epoxy resin-based material.

[0014] As a further embodiment of this invention, the anti-aging coating is a polyurethane-fluorocarbon composite layer.

[0015] As a further aspect of this utility model, the thickness of the base adhesive is 0.5-1mm.

[0016] As a further embodiment of this utility model, the thickness of the anti-aging coating is 0.2-0.3 mm.

[0017] As a further embodiment of this utility model, the inner diameter of the steering round steel pipe is 1.2-1.5 times the width of the carbon fiber cloth.

[0018] As a further embodiment of this utility model, the bending radius of the steering round steel pipe is ≥500mm.

[0019] As a further embodiment of this invention, the anchor includes a clip-type locking device and a stress monitoring sensor.

[0020] As a further embodiment of this utility model: the diameter of the reserved hole is 50-80mm, and the reserved hole is arranged symmetrically along the axis of the gate pier.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] By using a steering round steel pipe, the bending stress of carbon fiber cloth is reduced by 30%-40%. The UV resistance of the anti-aging coating is improved to 5000 hours without powdering. The construction positioning error is ≤2mm through the reserved hole.

[0023] This invention utilizes a pre-embedded tensioning process with carbon fiber cloth, combined with the synergistic effect of the steering circular steel pipe and anchorage, to reduce prestress loss to 8%-12%, increase construction efficiency by 40%, and significantly extend the structural lifespan with an anti-aging coating. It is particularly suitable for tensile stress scenarios in high water pressure gate piers. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a layout diagram of the present invention.

[0026] Figure 2 This is a cross-sectional view of the present invention.

[0027] Figure 3 This is a schematic diagram of the carbon fiber cloth in this utility model.

[0028] In the attached diagram: 1. Gate pier; 2. Carbon fiber cloth; 3. Steering round steel pipe; 4. Bracket; 5. Anchor; 6. Reserved hole; 7. Primer; 8. Anti-aging coating. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described 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 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.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0033] Please see Figures 1-3 This utility model provides a novel gate pier structure based on carbon fiber prestressing, comprising:

[0034] Gate pier 1, the bottom of which is provided with a reserved hole 6 for construction positioning; the reserved hole 6 has a diameter of 50-80mm and is symmetrically arranged along the axis of gate pier 1, so that the construction positioning error is ≤2mm.

[0035] Carbon fiber cloth 2, the carbon fiber cloth 2 is embedded inside the gate pier 1, and the gate pier 1 is provided with a steering round steel pipe 3 for changing the direction of the carbon fiber cloth 2.

[0036] And a corbel 4, which has an anchor 5, with both ends of the carbon fiber cloth 2 exposed and extending to the corbel 4 and fixed to the anchor 5, eliminating stress concentration of traditional concrete protrusions;

[0037] The carbon fiber cloth 2 is coated with a primer 7 and an anti-aging coating 8. The primer 7 is an epoxy resin-based material with a thickness of 0.5-1mm, and the anti-aging coating 8 is a polyurethane-fluorocarbon composite layer with a thickness of 0.2-0.3mm.

[0038] In this embodiment, after tensioning is completed, the base adhesive 7 and the anti-aging coating 8 are applied in sequence, and the installation position is calibrated through the reserved hole 6. The UV resistance of the anti-aging coating 8 is improved to 5000 hours without powdering.

[0039] The specific construction steps are as follows:

[0040] The carbon fiber cloth 2 (preferably II-3000 type carbon fiber cloth) is pre-embedded, passes through the 60mm inner diameter steering round steel pipe 3, and is fixed at both ends to the clamp-type anchor 5 of the bracket 4; the positioning template is installed through the reserved hole 6, and C50 concrete is poured; after tensioning to 3000MPa, epoxy primer 7 (thickness 0.8mm) and polyurethane-fluorocarbon coating 8 (thickness 0.25mm) are applied; in the area where the thrust at the bend exceeds 1000kN, the carbon fiber cloth 2 is laid in a double layer cross-lay.

[0041] In one embodiment of this utility model, please refer to Figures 1-3 The inner diameter of the steering round steel pipe 3 is 1.2-1.5 times the width of the carbon fiber cloth 2;

[0042] The bending radius of the steering round steel pipe 3 is ≥500mm;

[0043] The anchor 5 includes a clip-type locking device and a stress monitoring sensor.

[0044] In this embodiment, the steering round steel tube 3 reduces the bending stress of the carbon fiber cloth 2 by 30%-40%.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel gate pier structure based on carbon fiber prestressing, comprising a gate pier (1), wherein the bottom of the gate pier (1) is provided with a reserved hole (6) for construction positioning, characterized in that, Also includes: Carbon fiber cloth (2), the carbon fiber cloth (2) is embedded inside the gate pier (1), and the gate pier (1) is provided with a steering round steel pipe (3) for changing the direction of the carbon fiber cloth (2). And a cow leg (4), which has an anchor (5), with both ends of the carbon fiber cloth (2) extending outward to the cow leg (4) and fixed to the anchor (5).

2. The novel gate pier structure based on carbon fiber prestressing according to claim 1, characterized in that, The surface of the carbon fiber cloth (2) is coated with a primer (7) and an anti-aging coating (8).

3. The novel gate pier structure based on carbon fiber prestressing according to claim 2, characterized in that, The primer (7) is an epoxy resin-based material.

4. The novel gate pier structure based on carbon fiber prestressing according to claim 2, characterized in that, The anti-aging coating (8) is a polyurethane-fluorocarbon composite layer.

5. The novel gate pier structure based on carbon fiber prestressing according to claim 3, characterized in that, The thickness of the base adhesive (7) is 0.5-1mm.

6. The novel gate pier structure based on carbon fiber prestressing according to claim 4, characterized in that, The thickness of the anti-aging coating (8) is 0.2-0.3 mm.

7. The novel gate pier structure based on carbon fiber prestressing according to claim 1, characterized in that, The inner diameter of the steering round steel pipe (3) is 1.2-1.5 times the width of the carbon fiber cloth (2).

8. The novel gate pier structure based on carbon fiber cloth prestressing according to claim 1 or 7, characterized in that, The bending radius of the steering round steel pipe (3) is ≥500mm.

9. The novel gate pier structure based on carbon fiber prestressing according to claim 1, characterized in that, The anchor (5) includes a clip-type locking device and a stress monitoring sensor.

10. The novel gate pier structure based on carbon fiber prestressing according to claim 1, characterized in that, The reserved hole (6) has a diameter of 50-80mm and is arranged symmetrically along the axis of the gate pier (1).

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