Concrete crack repairing structure
By setting up carbon fiber bundle reinforcement components on concrete cracks and filling carbon fiber cloth impregnated glue, the problem of cracks prone to cracking under load in the prior art is solved, effectively sealing and suppressing the cracks, improving the reliability of repair structures and Durability.
Patent Information
- Application Number
- CN202420594563.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-22
AI Technical Summary
The existing concrete crack repair technology can easily cause cracks to crack again under long-term loads or dynamic loads, and repair failure, which cannot effectively inhibit the generation and development of cracks.
Using carbon fiber bundle reinforcement components, the strength and stability of the crack area are enhanced by setting crack expansion grooves, reinforcement grooves and drilling holes on concrete cracks and filling them with carbon fiber cloth impregnated glue. The carbon fiber bundle is connected to the fixed anchor bolt.
Effectively prevent the re-generating and development of cracks, improve the reliability and corrosion resistance of concrete crack repair structure, and simple construction operation and low cost.
Smart Images
Figure CN222276264U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of concrete crack repair, and specifically relates to a concrete crack repair structure. Background Art
[0002] In current technology, different crack treatment methods are selected according to the different widths of concrete cracks. When the width of the crack is less than 0.2mm, epoxy repair putty or epoxy repair mortar is generally used for direct sealing. When the width of the crack is greater than 0.2mm, V-shaped grooves or U-shaped grooves are generally cut, and then epoxy grouting materials are used for crack grouting treatment. Low-pressure grouting can be used, or medium-low pressure grouting can be used. However, the effective maintenance time of the concrete crack repair structure using the above crack treatment methods is usually not long, and the cracks will continue to crack. Utility Model Content
[0003] The purpose of the present application is to provide a concrete crack repair structure that can effectively limit the further cracking of the cracks and has good reliability.
[0004] In order to achieve the above-mentioned object, the present application provides a concrete crack repair structure on one hand, which comprises:
[0005] A crack expansion groove is provided on the concrete crack, wherein the length direction of the crack expansion groove is consistent with the length direction of the concrete crack;
[0006] A plurality of reinforcement grooves, wherein the plurality of reinforcement grooves are sequentially arranged at intervals along the length direction of the crack expansion groove, and the reinforcement grooves span the crack expansion groove;
[0007] A plurality of drill holes are distributed on both sides of the crack expansion groove and are arranged at the end of the reinforcement groove;
[0008] a plurality of carbon fiber bundle reinforcement components, the carbon fiber bundle reinforcement components comprising a carbon fiber bundle disposed in the reinforcement groove, and two ends of the carbon fiber bundle being respectively fixed in the drilled holes at both ends of the reinforcement groove; and
[0009] A filling structure is filled in the crack expansion groove, the reinforcement groove and the drill hole.
[0010] In some specific embodiments, the carbon fiber bundle reinforced component may further include a fixing anchor bolt, which is connected to the carbon fiber bundle and inserted into the drilled hole.
[0011] In some specific embodiments, the fixing anchor may include a bolt and a nut member, the nut member is provided with a through hole extending in the radial direction and an axial hole extending in the axial direction, the end of the carbon fiber bundle is passed through the through hole, the axial hole is provided with a thread and is connected to the through hole, the bolt is threadedly connected to the axial hole and the bottom is pressed against the carbon fiber bundle.
[0012] In some specific embodiments, the difference between the length of the bolt and the length of the axial hole may be greater than or equal to 20 mm.
[0013] In some specific embodiments, on the concrete base surface where the crack expansion groove is located, each of the reinforcement grooves has an intersection with the crack expansion groove, and the length direction of the reinforcement groove is perpendicular to the tangent direction of the crack expansion groove at the corresponding intersection point.
[0014] In some specific embodiments, the filling structure may be carbon fiber cloth impregnated with adhesive.
[0015] In some specific embodiments, the drill hole may be perpendicular to the concrete base surface where the crack expansion groove is located.
[0016] In some specific embodiments, the depth of the drilled hole may be greater than or equal to 55 mm and less than or equal to 65 mm.
[0017] In some specific embodiments, the cross-section of the crack expansion groove and / or the reinforcement groove may be U-shaped.
[0018] In some specific embodiments, the depth of the reinforcement groove may be greater than or equal to 15 mm and less than or equal to 25 mm.
[0019] In some specific embodiments, the distance between two adjacent reinforcement grooves may be greater than or equal to 200 mm and less than or equal to 300 mm.
[0020] Through the above technical solution, a carbon fiber bundle reinforcement component is arranged in the width direction of the concrete crack to reinforce the concrete slab surface, which can enhance the strength of the concrete crack part, effectively prevent the recurrence of cracks, and inhibit the development of concrete cracks. In addition, the carbon fiber bundle is light in material, has a large tensile strength value, is corrosion-resistant and aging-resistant, and can further improve the reliability of the concrete crack repair structure. In addition, the construction operation of the concrete crack repair structure is simple and convenient, and the construction cost is low.
[0021] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:
[0023] Figure 1 A structural schematic diagram of a concrete crack repair structure according to a specific embodiment of the utility model is shown;
[0024] Figure 2 Shows Figure 1 Schematic diagram of the construction structure of the crack expansion groove;
[0025] Figure 3 Shows Figure 1 Schematic diagram of the construction structure of the reinforcement groove;
[0026] Figure 4 Shows Figure 1 Schematic diagram of the construction structure of the drilling hole of the concrete crack repair structure;
[0027] Figure 5 Shows Figure 1 A schematic diagram of the construction structure of the filling structure of the concrete crack repair structure;
[0028] Figure 6 A schematic structural diagram of a nut member and a carbon fiber bundle according to a specific embodiment of the utility model is shown;
[0029] Figure 7 A structural schematic diagram of a carbon fiber bundle reinforcement component according to a specific embodiment of the utility model is shown.
[0030] Description of Reference Numerals
[0031] 1 Crack expansion slot 2 Reinforcement slot
[0032] 21 Drilling 31 Carbon Fiber Bundle
[0033] 32 bolts 33 nuts
[0034] 331 through hole 332 shaft hole
[0035] 4 Filling structure DETAILED DESCRIPTION
[0036] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.
[0037] After the cracks are repaired using the existing crack treatment methods, the concrete crack repair structure will be repeatedly deformed under the influence of the increase in load or dynamic load for a long time, and the epoxy grouting adhesive of the longitudinal cracks will produce fatigue damage, which will eventually lead to the failure of the crack repair. In other words, the existing crack treatment methods only seal the cracks and cannot inhibit the generation and development of cracks under dynamic loads or structural deformation.
[0038] In view of this, in order to limit the colloid damage of concrete crack repair structure in the later stage, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the present application provides a novel concrete crack repair structure, which includes a crack expansion groove 1, a plurality of reinforcement grooves 2, a plurality of drill holes 21, a plurality of carbon fiber bundle reinforcement components and a filling structure 4. The crack expansion groove 1 is opened on the concrete crack, and the length direction of the crack expansion groove 1 is consistent with the length direction of the concrete crack. That is, the crack expansion groove 1 is formed by removing the concrete structure adjacent to the concrete crack, and the axial length and radial width of the crack expansion groove 1 can be slightly larger than the axial length and radial width of the concrete crack, respectively.
[0039] A plurality of reinforcement grooves 2 are arranged in sequence and in a strip-shaped groove along the length direction of the crack expansion groove 1. The reinforcement grooves 2 span the crack expansion groove 1. A plurality of drill holes 21 are distributed on both sides of the crack expansion groove 1 and are respectively located at the end positions of the reinforcement grooves 2 along the length direction of the reinforcement grooves 2. Figure 4 As shown, each reinforcement groove 2 is provided with a bore hole 21 at both ends along its length direction. The bore hole 21 can be formed at the end groove bottom of the reinforcement groove 2 by drilling downward.
[0040] A plurality of carbon fiber bundle reinforcement components are arranged one by one with a plurality of reinforcement grooves 2, and the carbon fiber bundle reinforcement components include a carbon fiber bundle 31 and a fixing component, and the carbon fiber bundle 31 is arranged in the reinforcement groove 2 along the length direction of the reinforcement groove 2. The two ends of the carbon fiber bundle 31 are fixed in the boreholes 21 at the two ends of the reinforcement groove 2 by fixing components, respectively, and the filling structure 4 is filled in the crack expansion groove 1, the reinforcement groove 2 and the borehole 21, so that the carbon fiber bundle 31 can be fixed in the reinforcement groove 2 and the borehole 21, and the crack expansion groove 1 can be repaired. In this way, the concrete crack repair structure of the present application can not only seal the concrete cracks, but also inhibit the generation and development of cracks under dynamic loads or structural deformation. In addition, the carbon fiber bundle is light in material, has a large tensile strength value, and has good corrosion resistance and aging resistance. The use of the carbon fiber bundle 31 to strengthen the structure of the concrete crack part can further improve the reliability of the concrete crack repair structure. In addition, the construction operation of the concrete crack repair structure is simple and convenient, and the construction cost is low.
[0041] There are various ways to fix the end of the carbon fiber bundle 31 in the drill hole 21, such as by anchoring or by connecting a weight, etc. Correspondingly, the fixing components may be anchors and counterweights, etc., but the present application is not limited thereto.
[0042] The carbon fiber bundle can be a carbon fiber cloth bundle, and the material selection meets the "Technical Specifications for Safety Appraisal of Engineering Structure Reinforcement Materials" GB50728-2011. The relevant design can be based on the "Concrete Structure Reinforcement Design Specifications"
[0043] The standard tensile strength and design values of fibers in GB50367-2013 are as follows:
[0044] Table 4.3.3 Standard values of tensile strength of fiber composite materials
[0045]
[0046] Table 4.3.4-1 Design value of tensile strength of carbon fiber composites (MPa)
[0047]
[0048] Note: The L-shaped plate is adopted according to the design value of high-strength grade II strip plate.
[0049] In some specific embodiments, the carbon fiber bundle reinforced assembly may further include a fixing anchor bolt as a fixing component, the drill hole 21 is an anchor bolt drill hole, and the fixing anchor bolt is connected to the carbon fiber bundle 31 and inserted into the drill hole 21, so that the operation is simple and convenient, and the production cost is low. Among them, the structure of the fixing anchor bolt can be various, such as a concrete screw, a bonding anchor bolt, a concrete nail, etc., and the present application is not limited thereto.
[0050] Alternatively, if Figure 5 and Figure 6 As shown, the fixing anchor bolt may include a bolt 32 and a nut member 33. The nut member 33 is provided with a through hole 331 extending along its radial direction and an axial hole 332 extending along its axial direction. The axial hole 332 is provided with threads and is arranged at the upper part of the nut member 33. The through hole 331 is connected with the axial hole 332. The end of the carbon fiber bundle 31 is penetrated in the through hole 331, the bolt 32 is penetrated in the axial hole 332 and is threadedly connected with the axial hole 332, and the bottom of the bolt 32 is pressed against the carbon fiber bundle 31, thereby fixing the carbon fiber bundle 31 in the drill hole 21.
[0051] Optionally, the difference between the length of the bolt 32 and the length of the shaft hole 332 is greater than or equal to 20 mm, so that the anchoring reliability of the carbon fiber bundle 31 can be guaranteed. The diameter of the fixing anchor bolt can be 5 mm or 10 mm, and the corresponding length is 300 mm or 600 mm.
[0052] Optionally, the reinforcement groove 2 may span the crack expansion groove 1 along the width direction of the crack expansion groove 1. On the concrete base surface where the crack expansion groove 1 is located, each reinforcement groove 2 has an intersection point with the crack expansion groove 1, and the tangent direction of the crack expansion groove 1 at the intersection point is perpendicular to the length direction of the reinforcement groove 2 corresponding to the intersection point.
[0053] In some specific embodiments, the filling structure 4 can be a carbon fiber cloth impregnated adhesive, which has good bonding strength with the carbon fiber bundle 31 and high structural strength. Among them, the carbon fiber cloth impregnated adhesive can be an impregnated type A modified epoxy resin structural adhesive, which has the advantages of aging resistance, corrosion resistance and high strength, and can be well immersed in concrete and carbon fiber bundle 31, so that the carbon fiber bundle 31 can be bonded with the concrete to bear force together.
[0054] Optionally, the drill hole 21 is perpendicular to the concrete base surface where the crack expansion groove 1 is located, so that the structural strength of the concrete crack repair structure is higher.
[0055] Optionally, the depth of the bore hole 21 may be greater than or equal to 55 mm and less than or equal to 65 mm. Preferably, the depth of the bore hole 21 is 60 mm and the diameter is 14 mm.
[0056] In some specific embodiments, the cross-section of the crack expansion groove 1 and / or the reinforcement groove 2 may be U-shaped, that is, the crack expansion groove 1 and / or the reinforcement groove 2 may be a U-shaped groove, and the depth and width of the U-shaped groove are appropriate, which can make the use of the filling structure 4 more appropriate, which is conducive to reducing maintenance costs.
[0057] Optionally, the width of the reinforcement groove 2 is 3-8 mm, the depth is 15-25 mm, and the length is 250-350 mm. Preferably, the width of the reinforcement groove 2 is 5 mm, the depth is 20 mm, and the length is 300 mm. In this case, the length of the carbon fiber bundle 31 can be 350 mm, the diameter is 3 mm, the specification is 12k, and the density is 1.8 g / cm3.
[0058] Optionally, a plurality of reinforcement grooves 2 are arranged in sequence at equal intervals along the length direction of the crack expansion groove 1, and a distance between two adjacent reinforcement grooves 2 is greater than or equal to 200 mm and less than or equal to 300 mm.
[0059] The following is a brief description of the construction process of the concrete crack repair structure of the present application: cleaning the base surface → digging a crack expansion groove 1 along the longitudinal crack → cutting a reinforcement groove 2 transversely → drilling holes 21 at both ends of the reinforcement groove 2 → installing and fixing anchor bolts and carbon fiber bundles 31 → pouring impregnated structural adhesive → curing.
[0060] Specifically, the construction steps are as follows:
[0061] 1. A crack expansion groove 1 is opened along the length direction of the concrete crack, and the crack expansion groove 1 is a U-shaped groove; a reinforcement groove 2 is chiseled perpendicular to the concrete crack, and the reinforcement groove 2 is a U-shaped groove with a width of 5 mm, a depth of 20 mm, and a length of 300 mm; holes are drilled at both ends of the reinforcement groove 2 to form a drill hole 21, and the depth of the drill hole 21 is 60 mm and the drill hole diameter is 14 mm.
[0062] 2. Clean the dust in the reinforcement groove 2 and the drilled holes 21 at both ends to ensure that there is no contamination such as oil stains.
[0063] 3. After the fixing anchor bolt and the carbon fiber bundle 31 are connected and fixed, the carbon fiber bundle 31 is directly placed into the reinforcement groove 2, and the fixing anchor bolt is placed into the drill hole 21. The carbon fiber bundle 31 and the fixing anchor bolt are arranged perpendicular to the crack expansion groove 1.
[0064] 4. Use carbon fiber cloth impregnated structural adhesive to pour into the crack expansion groove 1, reinforcement groove 2 and drill hole 21 until they are filled with adhesive.
[0065] 5. Avoid disturbance of the fixing anchor bolts and the carbon fiber bundles 31 during the curing process.
[0066] 6. The concrete crack repair structure can be loaded or used only after the impregnated structural adhesive is completely cured.
[0067] In summary, the concrete crack repair structure of the present application adopts the technology of carbon fiber bundles plus two-end anchoring, cuts a U-shaped groove vertically in the crack, punches holes at both ends of the groove, and then uses modified epoxy impregnated structural adhesive to pour glue. After the colloid is completely solidified, the subsequent construction process can be carried out. It is suitable for base surfaces with cracks on the surface of floor slabs, concrete pavements, basement concrete floors, concrete floors, etc., as well as base surfaces with cracks on concrete pavements that have been under heavy objects or dynamic loads for a long time. Using this solution to treat cracks can inhibit the generation of cracks in concrete slabs under the repeated action of structural crack dynamic loads or the deformation of the structure itself, and the carbon fiber bundle combined with the fixed anchor bolts can limit the deformation of the cracks and prevent the increase of crack deformation in the structure during creep.
[0068] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0069] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A concrete crack repair structure, characterized in that: include: A crack expansion groove (1) is formed on the concrete crack, and the length direction of the crack expansion groove (1) is consistent with the length direction of the concrete crack; A plurality of reinforcement grooves (2), wherein the plurality of reinforcement grooves (2) are sequentially arranged at intervals along the length direction of the crack expansion groove (1), and the reinforcement grooves (2) span the crack expansion groove (1); A plurality of drill holes (21) distributed on both sides of the crack expansion groove (1) and arranged on the end of the reinforcement groove (2); A plurality of carbon fiber bundle reinforcement components, the carbon fiber bundle reinforcement components comprising a fixing anchor bolt and a carbon fiber bundle (31) arranged in the reinforcement groove (2), two ends of the carbon fiber bundle (31) being respectively fixed in the drill holes (21) located at both ends of the reinforcement groove (2), and the fixing anchor bolt being connected to the carbon fiber bundle (31) and inserted in the drill hole (21); as well as A filling structure (4) is filled in the crack expansion groove (1), the reinforcement groove (2) and the drill hole (21).
2. The concrete crack repair structure according to claim 1, characterized in that: The fixing anchor bolt comprises a bolt (32) and a nut member (33); the nut member (33) is provided with a through hole (331) extending in the radial direction and an axial hole (332) extending in the axial direction; the end of the carbon fiber bundle (31) is inserted into the through hole (331); the axial hole (332) is provided with a thread and communicates with the through hole (331); the bolt (32) is threadedly connected to the axial hole (332) and its bottom is pressed against the carbon fiber bundle (31).
3. The concrete crack repair structure according to claim 1, characterized in that: The filling structure (4) is carbon fiber cloth impregnated with adhesive.
4. The concrete crack repair structure according to claim 1, characterized in that: The drill hole (21) is perpendicular to the concrete base surface where the crack expansion groove (1) is located.
5. The concrete crack repair structure according to claim 1, characterized in that: The depth of the drill hole (21) is greater than or equal to 55 mm and less than or equal to 65 mm.
6. The concrete crack repair structure according to claim 1, characterized in that: The cross section of the crack expansion groove (1) and / or the reinforcement groove (2) is U-shaped.
7. The concrete crack repair structure according to claim 1, characterized in that: On the concrete base surface where the crack expansion groove (1) is located, each of the reinforcement grooves (2) has an intersection with the crack expansion groove (1), and the length direction of the reinforcement groove (2) is perpendicular to the tangent direction of the crack expansion groove (1) at the corresponding intersection point.
8. The concrete crack repair structure according to claim 1, characterized in that: The depth of the reinforcement groove (2) is greater than or equal to 15 mm and less than or equal to 25 mm.
9. The concrete crack repair structure according to claim 1, characterized in that: The distance between two adjacent reinforcement grooves (2) is greater than or equal to 200 mm and less than or equal to 300 mm.