A repairing structure for concrete surface of hydraulic structure after being damaged by washing and grinding

Abstract

The utility model relates to building repair technical field, and its purpose lies in providing a kind of repair structure suitable for the repair of concrete surface of hydraulic structure after scouring and grinding, including the repair area of several insert bars of insert fixing in original concrete matrix, and the interface layer, repair layer and reinforcing maintenance layer are sequentially arranged in repair area from inside to outside, and the tail end of insert bar is located in repair layer.The utility model discloses a three-in-one composite structure of "interface layer+repair layer+reinforcing maintenance layer", which ensures the good combination of repair layer and original concrete matrix, and significantly improves the construction quality and efficiency of repair project.The application of interface agent effectively improves the bonding performance of new and old material layers, and the anti-impact wear-resistant composite material provides main protection function, and reinforcing maintenance material guarantees the full play of the performance of repair material, and the three together constitute a complete repair system.

Description

Technical Field

[0001] This utility model relates to the field of building repair technology, and in particular to a repair structure suitable for the repair of concrete surfaces damaged by erosion in hydraulic structures. Background Technology

[0002] Concrete in the flow passages of hydraulic structures is susceptible to damage from the long-term scouring and abrasion of high-speed water flows containing sand, gravel, ice, and other media, affecting normal operation. In the past decade, the problem of concrete scouring and abrasion damage has become increasingly prominent in newly constructed high-head, large-discharge, and high-velocity hydraulic projects in China. Even more serious is the fact that the structural damage rate of early-built hydraulic spillway structures has exceeded 65% due to long-term scouring and abrasion, creating enormous maintenance pressure and seriously threatening the safe operation of the projects. Against this backdrop, concrete scouring and abrasion resistance repair has become a key technical aspect of hydraulic engineering maintenance. To ensure repair effectiveness and service life, a scientifically effective repair structure must be established. Utility Model Content

[0003] The purpose of this invention is to provide a repair structure suitable for the repair of concrete surfaces damaged by erosion in hydraulic structures, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A repair structure suitable for the surface of concrete in hydraulic structures after erosion damage includes several insert bars fixed to the repair area on the original concrete substrate. The repair area is provided with an interface layer, a repair layer and a reinforcing curing layer from the inside to the outside. The tail end of the insert bar is located in the repair layer.

[0006] The repair area is the area after the surface concrete and impurities have been removed from the abrasion-damaged concrete surface of the hydraulic structure.

[0007] The interface layer is an interface agent applied by brushing.

[0008] The repair layer is an impact-resistant and wear-resistant composite material applied by pressure troweling.

[0009] The reinforced curing layer is a reinforced curing material applied by spraying.

[0010] The insert includes a steel bar, and the tail end of the steel bar is fixedly provided with a nail head through a diameter-changing area.

[0011] The diameter of the nail head is larger than the diameter of the variable diameter zone, and the minimum diameter at the bottom of the variable diameter zone is the same as the diameter of the reinforcing bar.

[0012] Several ribs are evenly arranged on the outer wall of the reinforcing bars and the diameter-changing zone.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] This invention employs a three-in-one composite structure of "interface layer + repair layer + reinforcing curing layer," ensuring a good bond between the repair layer and the original concrete substrate, while significantly improving the construction quality and efficiency of the repair project. Specifically, the application of the interface agent effectively improves the adhesion between the old and new material layers, the impact-resistant and abrasion-resistant composite material provides the main protective function, and the reinforcing curing material ensures that the performance of the repair material is fully realized. Together, these three elements constitute a complete repair system. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the reinforcing bar structure in an embodiment of this utility model.

[0017] The attached diagrams are numbered and named as follows: 1. Original concrete substrate; 2. Interface layer; 3. Repair layer; 4. Reinforcing and curing layer; 5. Inserted bar; 5. Nail head; 501. Rib; 502. Reinforcing bar; 503. Variable diameter zone; 504. Detailed Implementation

[0018] 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 embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the present invention provides a repair structure suitable for the repair of concrete surfaces damaged by erosion in hydraulic structures. It includes several reinforcing bars 5 inserted and fixed to the repair area on the original concrete substrate 1. The repair area is provided with an interface layer 2, a repair layer 3, and a reinforcing and curing layer 4 from the inside to the outside. The tail end of the reinforcing bar 5 is located in the repair layer 3. The repair area is the area after the surface concrete and impurities have been removed from the erosion-damaged area of ​​the concrete surface of the hydraulic structure. The edge of the repair area should be roughened perpendicular to the surface by at least 10mm.

[0021] Interface layer 2 is a brush-applied interface agent, which is a commercially available ready-made interface agent. This interface agent enables a reliable bond between repair layer 3 and the original concrete substrate 1. Repair layer 3 is a trowel-applied impact-resistant and abrasion-resistant composite material, which is a commercially available cement-based impact-resistant and abrasion-resistant composite material. This ensures that the material properties match those of the original concrete substrate 1. Through synergistic stress transmission with the reinforcing bars, stress transfer is integrated, allowing repair layer 3 to form a continuous load-bearing structure, effectively guaranteeing the overall performance and repair quality of the composite structure. Reinforcing and curing layer 4 is a spray-applied reinforcing and curing material, which is a commercially available ready-made reinforcing and curing material containing alkali metal silicate active ingredients. Through penetration and crystallization, it can significantly improve the surface density and surface hardness of the cement-based material, simultaneously achieving enhanced impact and abrasion resistance and efficient curing function.

[0022] like Figure 2 As shown, the insert 5 includes a steel bar 503. The tail end of the steel bar 503 is fixed with a nail head 501 via a diameter-changing zone 504. The diameter of the nail head 501 is larger than the diameter of the diameter-changing zone 504. The minimum diameter at the bottom of the diameter-changing zone 504 is the same as the diameter of the steel bar 503. Several ribs 502 are evenly distributed on the outer walls of the steel bar 503 and the diameter-changing zone 504, meaning the steel bar 503 is a ribbed steel bar. By setting the insert 5 as a "large head, small body" irregular structure, a three-dimensional gradually changing mechanical interlocking interface can be formed. The irregular diameter-changing zone 504 retains the characteristics of ribbed steel bars, and the micro-convex ribs 502 on it, together with the impact-resistant and wear-resistant composite material, form a composite structure, significantly enhancing the gripping force between the steel bar 503 and the impact-resistant and wear-resistant repair material. Simultaneously, utilizing the wedge effect of the irregular diameter-changing zone 504 with the nail head, the repair material forms a self-tightening wrap under stress, effectively avoiding the slippage failure problem that occurs with traditional rebar installation.

Claims

1. A repair structure suitable for the abrasion damage to the concrete surface of hydraulic structures, characterized in that: The repair area includes several reinforcing bars (5) that are inserted and fixed on the original concrete substrate (1). The repair area is provided with an interface layer (2), a repair layer (3) and a reinforcing curing layer (4) from the inside to the outside. The tail end of the reinforcing bar (5) is located in the repair layer (3).

2. The repair structure for the concrete surface of hydraulic structures after abrasion damage as described in claim 1, characterized in that: The repair area is the area after the surface concrete and impurities have been removed from the abrasion-damaged concrete surface of the hydraulic structure.

3. The repair structure for the concrete surface of hydraulic structures after abrasion damage according to claim 1, characterized in that: The interface layer (2) is an interface agent applied by brushing.

4. The repair structure for concrete surfaces of hydraulic structures after abrasion damage as described in claim 1, characterized in that: The repair layer (3) is an impact-resistant and wear-resistant composite material applied by pressure troweling.

5. A repair structure for concrete surfaces of hydraulic structures after abrasion damage according to claim 1, characterized in that: The reinforced curing layer (4) is a reinforced curing material applied by spraying.

6. A repair structure for concrete surfaces of hydraulic structures after abrasion damage according to claim 1, characterized in that: The insert (5) includes a steel bar (503), and the tail end of the steel bar (503) is fixedly provided with a nail head (501) through the diameter change area (504).

7. A repair structure for concrete surfaces of hydraulic structures after abrasion damage according to claim 6, characterized in that: The diameter of the nail head (501) is larger than the diameter of the variable diameter area (504), and the minimum diameter at the bottom of the variable diameter area (504) is the same as the diameter of the reinforcing bar (503).

8. A repair structure for concrete surfaces of hydraulic structures after abrasion damage according to claim 7, characterized in that: Several ribs (502) are evenly arranged on the outer wall of the reinforcing bar (503) and the diameter-changing area (504).

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