Quick repair structure for frost heaving damage of concrete of water retaining building

Abstract

The utility model discloses a water retaining building concrete frost heaving damage rapid repairing structure which comprises a repairing layer arranged on a concrete damage face, a first interface agent layer is arranged between the repairing layer and the concrete damage face, and an anti-freezing protection layer is arranged on the face, away from the concrete damage face, of the repairing layer. A second interface agent layer is arranged between the anti-freezing protection layer and the repairing layer, and an anti-frost-crack reinforcing assembly connected with existing building concrete is further arranged in the repairing layer. The repairing layer is used for filling pits formed by concrete damage so as to achieve concrete repairing, the anti-freezing protection layer can improve the anti-freezing performance of the concrete and the repairing layer, the first interface agent layer is used for bonding the repairing layer to the concrete damage face, and the second interface agent layer is used for bonding the anti-freezing protection layer to the repairing layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete structure repair technical field, concretely relates to a kind of concrete frost heaving damage quick repair structure of water retaining structure. BACKGROUND

[0002] In most water retaining structures of water conservancy projects in severe cold regions such as western and northern China, concrete frost heaving damage often occurs on the water contact surface, such as upstream slope protection, spillway, gate pier, retaining wall, water intake tower and tunnel, and frost damage of hydraulic concrete structure is often the main factor leading to concrete deterioration, which is also one of the common diseases of concrete structure in water conservancy projects in China. Frost heaving leads to loose and even exposed steel bars on the surface of concrete, which seriously affects the safe operation and service life of the project.

[0003] Currently, when concrete of water retaining structure is damaged by frost heaving, the damaged surface is usually repaired with inorganic repair mortar, which has the disadvantages of low interfacial adhesion strength, poor frost resistance and repair layer failure after 2-3 years of repair, resulting in repeated maintenance of the project and waste of a large amount of manpower and material resources. SUMMARY

[0004] The utility model aims at the problems existing in the prior art, and provides a kind of concrete frost heaving damage quick repair structure of water retaining structure.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A kind of concrete frost heaving damage quick repair structure of water retaining structure, including the repair layer being arranged on the concrete damaged surface, first interface agent layer is arranged between the repair layer and the concrete damaged surface, anti-freezing protective layer is arranged on the side of the repair layer away from the concrete damaged surface, second interface agent layer is arranged between the anti-freezing protective layer and the repair layer, and anti-freezing and anti-cracking reinforcing assembly connected with existing building concrete is further arranged in the repair layer.

[0007] In the above technical scheme, the repair layer is used to fill the pit formed by concrete damage, thereby repairing the concrete, the anti-freezing protective layer can increase the frost resistance of concrete and repair layer, the first interface agent layer is used to bond the repair layer on the concrete damaged surface, and the second interface agent layer is used to bond the anti-freezing protective layer on the repair layer.

[0008] Further, the repair layer is an epoxy mortar layer, which can improve the overall repair speed and the strength of the repair structure, and the anti-freezing protective layer is a polyurea layer, which can increase the frost resistance of concrete and repair layer.

[0009] Further, the concrete damage surface is a concave-convex structure, the repairing layer fills the concave-convex structure, and the outer surface of the repairing layer is treated as a flat surface.

[0010] Further, the anti-freezing protection layer has a thickness of 2-4 mm, covers the repairing layer and extends to the outer surface of the existing building concrete.

[0011] Further, the first interface agent layer is an epoxy interface agent layer, the second interface agent layer is a polyurea interface agent layer, and the thickness of the second interface agent layer is not less than the thickness of the first interface agent layer.

[0012] Further, the thickness of the second interface agent layer is 0.2-1 mm and does not exceed 1 / 4 of the thickness of the anti-freezing protection layer.

[0013] Further, the anti-freezing and cracking reinforcing assembly comprises a plurality of reinforcing ribs arranged in the repairing layer, one end of the reinforcing rib extends into the existing building concrete, the other end extends to the concrete repairing surface, and a mesh or a wire is connected to the reinforcing ribs in the repairing layer, so as to enhance the tensile strength of the repairing layer, improve the overall carrying capacity of the structure, and prevent the mortar far from the concrete damage surface from falling off under the action of gravity or vibration force.

[0014] Further, the outer periphery of the reinforcing rib is provided with a plurality of barbs or barbs, and the outer periphery of the reinforcing rib is also provided with a radial connecting rib, the end of the radial connecting rib is provided with a connecting hook, and the radial connecting rib and the connecting hook are used for connecting the mesh or the wire.

[0015] Compared with the prior art, the quick repairing structure for the water retaining building concrete frost heaving damage has the following advantages: 1. The repairing layer fills the pit formed by the concrete damage, so as to repair the concrete, the anti-freezing protection layer can increase the anti-freezing performance of the concrete and the repairing layer, the first interface agent layer is used for bonding the repairing layer to the concrete damage surface, the second interface agent layer is used for bonding the anti-freezing protection layer to the repairing layer, the whole repairing structure is simple, easy to operate and implement, and has low cost, long service life after repair, and small probability of cracking and frost heaving again within a period of time; 2. The quick repairing structure considers the problem of repairing concrete under low temperature conditions, can be used for timely processing of the frost heaving damage part of the water retaining building concrete in severe cold regions, has an effective operation time of more than 5 years, can save maintenance time and cost, reduce maintenance frequency, ensure the efficient, safe and normal operation of the water conservancy and hydropower project, and save water resources; 3. The anti-freezing and cracking reinforcing assembly can further improve the strength and stability of the repairing layer, make it more reliable to connect with the existing concrete, and reduce the risk of further cracking or frost heaving of the repairing structure in subsequent low temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole schematic view of the quick repairing structure of the concrete frost heaving damage of the water retaining structure of the utility model;

[0017] Figure 2 It is the whole schematic view of the quick repairing structure of the concrete frost heaving damage of the water retaining structure of the utility model; Figure 1 It is the whole schematic view of the quick repairing structure of the concrete frost heaving damage of the water retaining structure of the utility model;

[0018] Figure 3 It is the whole schematic view of the quick repairing structure of the concrete frost heaving damage of the water retaining structure of the utility model;

[0019] Figure 4 It is the whole schematic view of the quick repairing structure of the concrete frost heaving damage of the water retaining structure of the utility model;

[0020] In the figure: 1, concrete damage surface; 2, repair layer; 3, first interface agent layer; 4, anti-freezing protection layer; 5, second interface agent layer; 6, concrete repair surface; 7, reinforcing bar; 8, existing building concrete; 9, burr; 10, radial connecting rib; 11, connecting hook; 12, mesh. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] In the description of the utility model, it should be explained that the directions or position relations indicated by the terms "intermediate", "upper", "lower", "left", "right", "inner", "outer" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Embodiment 1

[0023] As shown in Figure 1 and Figure 2 A kind of quick repairing structure of concrete frost heaving damage of water retaining structure, including the repair layer 2 being set on concrete damage surface 1, first interface agent layer 3 is equipped between the repair layer 2 and the concrete damage surface 1, anti-freezing protection layer 4 is equipped in the repair layer 2 away from the concrete damage surface 1 side, second interface agent layer 5 is equipped between the anti-freezing protection layer 4 and the repair layer 2, and anti-freezing crack reinforcing assembly connected with existing building concrete 8 is also equipped in the repair layer 5.

[0024] The concrete frost damage quick repair structure of the water retaining structure fills the pits formed by the concrete damage with the repair layer 2 to repair the concrete, the anti-frost protection layer 4 can increase the frost resistance of the concrete and the repair layer 2, the first interface agent layer 3 is used to bond the repair layer 2 to the concrete damage surface 1, and the second interface agent layer 5 is used to bond the anti-frost protection layer 4 to the repair layer 2. The whole repair structure is not only simple, easy to operate and implement, but also low in cost, long in service life after repair, and small in probability of cracking and frost damage again in a period of time.

[0025] The quick repair structure considers the problem of repairing concrete under low temperature conditions, can be used to timely treat the concrete frost damage part of the water retaining structure in cold regions, has an effective operation time of more than 5 years, can save repair time and cost, reduce repair frequency, ensure efficient, safe and normal operation of water conservancy and hydropower projects, and save water resources.

[0026] The setting of the anti-frost enhanced assembly can further improve the strength and stability of the repair layer, so that it can not only be more firmly connected with the existing concrete, but also reduce the risk of further frost cracking or frost damage of the repair structure in subsequent low temperature environment.

[0027] Further, the repair layer 2 is an epoxy mortar layer, and the anti-frost protection layer 4 is a polyurea layer.

[0028] In the above scheme, the epoxy repair mortar material has the characteristics of fast curing reaction and high strength, so that the quick curing of the repair layer 2 can be realized, and the overall repair speed and the strength of the repair structure are improved. The polyurea layer is formed by single-component polyurea solidification, and the single-component polyurea material has the characteristics of good toughness, strong frost resistance and excellent weather resistance. By arranging the polyurea layer as a layered structure on the outermost side, the frost resistance of the concrete and the repair layer 2 can be increased.

[0029] Further, the concrete damage surface 1 is a concave-convex structure, the first interface agent layer 3 is brushed along the concave-convex structure, and the repair layer 2 fills the concave-convex structure; the outer surface of the repair layer 2 is treated as a flat surface, so as to further coat the second interface agent layer 5 and the anti-frost protection layer 4.

[0030] Further, the thickness of the anti-frost protection layer 4 is 2-4 mm, and the anti-frost protection layer 4 and the second interface agent layer 5 cover the repair layer 2 and extend to the outer surface of the existing building concrete 8 around to improve the frost resistance of the joint between the repair structure and the existing concrete structure.

[0031] In this embodiment, the side of the repair layer 2 away from the damaged concrete surface 1 is flush with the concrete repair surface 6 (parallel to the outer surface of the existing building concrete), thereby ensuring the aesthetics of the concrete repair surface 6. The coverage of the antifreeze protective layer 4 and the second interface agent layer 5 extends to the periphery of the concrete repair surface 6 and extends outward by at least 10cm, thereby increasing the bonding strength between the antifreeze protective layer 4 and the concrete and preventing the repair layer 2 and the antifreeze protective layer 4 from falling off the concrete.

[0032] Furthermore, the first interface agent layer 3 is an epoxy interface agent layer, the second interface agent layer 5 is a polyurea interface agent layer, and the thickness of the second interface agent layer 5 is not less than the thickness of the first interface agent layer 3.

[0033] In this embodiment, the epoxy interface agent layer is used to enhance the bond strength between the damaged concrete surface 1 and the epoxy mortar layer. The epoxy interface agent layer is made of epoxy interface agent material, which is an interface agent with added epoxy resin. It mainly consists of epoxy resin, reactive diluent, fillers, etc., and has characteristics such as high adhesion, corrosion resistance, and chemical corrosion resistance. The polyurea interface agent layer is used to increase the bond strength between the polyurea layer and the epoxy mortar layer. The polyurea interface agent layer can be made of epoxy-polyurethane material. Epoxy-polyurethane material is a high-performance material that combines epoxy resin and polyurethane, possessing excellent adhesion and the ability to firmly bond with various substrates, providing reliable structural connection and layer protection.

[0034] Furthermore, the thickness of the second interface agent layer 5 is 0.2 to 1 mm, preferably about 0.3 mm, and does not exceed 1 / 4 of the thickness of the antifreeze protective layer 4. An interface agent layer of appropriate thickness can improve the bonding performance at the interface and reduce material costs.

[0035] Furthermore, in combination Figure 3 and Figure 4 As shown, the anti-freeze cracking reinforcement component includes multiple reinforcing ribs 7 disposed within the repair layer 2. One end of each reinforcing rib 7 is a pointed tip, allowing it to extend into the existing building concrete 8 (with adhesive placed inside the holes), while the other end extends towards the concrete repair surface. Several of the reinforcing ribs 7 are also connected to mesh 12 or wires within the repair layer 2. In some embodiments, the axial direction of the reinforcing ribs coincides with the normal direction of the lowest point of the concave surface of the damaged concrete.

[0036] The reinforcing rib 7 can penetrate into the concrete 8 of the existing building, can enhance the tensile strength of the repair layer 2, improve the overall carrying capacity of the structure, and avoid the mortar of the repair layer 2 far from the concrete damage surface 1 from falling off under the action of its own gravity or vibration force. The arrangement of the mesh 12 or the wire can also reinforce and enhance the concrete structure, improve the seismic resistance, carrying capacity and service life of the building, and reduce the probability of cracking of the repaired structure again due to low temperature expansion.

[0037] Further, the outer periphery of the reinforcing rib 7 is provided with a plurality of barbs 9 or barbs, and the outer periphery of the reinforcing rib 7 is also provided with a radial connecting rib 10, and the end of the radial connecting rib 10 is provided with a connecting hook 11, and the radial connecting rib 10 and the connecting hook 11 are used to connect the mesh 12 or the wire.

[0038] The arrangement of the barb 9 and the barb structure can improve the bonding capacity of the reinforcing rib and the epoxy mortar; the radial connecting rib 10 can support the mesh 12 passing through the reinforcing rib 7, and the connecting hook 11 can be connected with the mesh 12, which is convenient for binding and fixing. Embodiment 2

[0039] The embodiment provides a construction method of the water retaining building concrete frost heaving damage rapid repair structure in embodiment 1, and the construction method comprises the following steps:

[0040] Step 1: Drilling and implanting reinforcing rib

[0041] At the lowest point of the concave surface of the concrete damage surface 1, the concrete base 8 is drilled, the distance from each lowest point of the concave surface on the damage surface to the corresponding point on the repair surface is measured, the appropriate length of the reinforcing rib 7 is selected according to the measurement result, the length of the reinforcing rib 7 is ensured to be 5 to 10 cm longer than the measured distance, the reinforcing rib 7 is inserted into the drill hole, and the gap between the reinforcing rib 7 and the drill hole is filled with epoxy repair mortar. After the epoxy repair mortar is dried and solidified, the reinforcing rib 7 will be fixed in the concrete base.

[0042] Step 2: Surface treatment

[0043] The concrete damage surface 1 is thoroughly cleaned to remove all loose concrete fragments, dust and debris, and the concrete damage surface 1 is polished using an angle grinder or similar tool to remove any uneven or protruding parts, ensuring a smooth surface. Use a high-pressure water gun or compressed air to remove dust generated during polishing to ensure a clean surface. Check the concrete damage surface 1 to ensure that there is no residual grease, paint or other substances that may affect adhesion. If necessary, use appropriate chemical cleaners to further clean the surface.

[0044] Before construction, make sure that the concrete damaged surface 1 is completely dry, because moisture may affect the bonding strength and the curing of the repair material.

[0045] Step 3: brushing epoxy interface agent

[0046] After the cleaning work is completed, the epoxy interface agent is brushed on the concrete damaged surface 1, and the epoxy interface agent is waited to solidify to form the first interface agent layer 3.

[0047] Step 4: repairing the damaged part

[0048] The epoxy repair mortar is brushed on the surface of the first interface agent layer 3, the thickness of each layer is controlled to be 3-5 centimeters, if the repair thickness is larger, the next layer of repair needs to be carried out after the previous layer of epoxy repair mortar is solidified, and the repair is continued until the damaged part is completely repaired, and it is ensured that the reinforcing rib 7 is fixed in the epoxy mortar, the surface of the epoxy repair mortar is scraped to be flush with the concrete repair surface 6, and the epoxy repair mortar is solidified to form the repair layer 2. The mesh can be arranged between the reinforcing ribs as needed (depending on the area and depth of the damaged part) during step 4 or before step 4.

[0049] Step 5: brushing polyurea interface agent

[0050] The polyurea interface agent is brushed on the repair layer 2, and the coverage should be extended to 10 centimeters around the concrete repair surface 6, and the polyurea interface agent is solidified to form the second interface agent layer 5.

[0051] Step 6: coating one-component polyurea

[0052] The one-component polyurea is coated on the second interface agent layer 5, it is ensured that the coverage matches the second interface agent layer 5, the one-component polyurea is scraped repeatedly for 2-3 times, it is ensured that the surface of the one-component polyurea is flat, and the one-component polyurea is completely cured to form the anti-freezing protective layer 4.

[0053] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for rapid repair of concrete frost damage of a water retaining structure, characterized in that, The patch layer is an epoxy mortar layer, and the anti-freezing protection layer is a polyurea layer.

2. The rapid repair structure for frost damage of a water retaining structure concrete according to claim 1, characterized by, The concrete damaged surface is a concave-convex structure, the patch layer fills the concave-convex structure, and the outer surface of the patch layer is treated as a flat surface.

3. The rapid repair structure for frost damage of the water retaining structure concrete according to claim 1, characterized by, The thickness of the anti-freezing protection layer is 2-4 mm, the anti-freezing protection layer covers the patch layer and extends to the outer surface of the existing building concrete around.

4. The rapid repair structure for frost damage of the water retaining structure concrete according to claim 1, characterized by, The first interface agent layer is an epoxy interface agent layer, and the second interface agent layer is a polyurea interface agent layer.

5. The rapid repair structure for frost damage of the water retaining structure concrete according to claim 1, wherein The thickness of the second interface agent layer is 0.2-1 mm and does not exceed 1 / 4 of the thickness of the anti-freezing protection layer.

6. The rapid repair structure for frost damage of the water retaining structure concrete according to claim 1, wherein The anti-freezing crack reinforcing assembly comprises a plurality of reinforcing ribs arranged in the patch layer, one end of the reinforcing rib extends into the existing building concrete, the other end extends to the concrete patch surface, and a plurality of reinforcing ribs are further connected with a mesh or a wire in the patch layer.

7. The rapid repair structure for frost damage of the water retaining structure concrete according to claim 1, characterized by, The outer periphery of the reinforcing rib is provided with a plurality of barbs or barbed hooks, and the outer periphery of the reinforcing rib is further provided with a radial connecting rib, the end of the radial connecting rib is provided with a connecting hook, and the radial connecting rib and the connecting hook are used to connect the mesh or the wire.

8. The rapid repair structure for frost damage of a water retaining structure concrete according to claim 7, characterized by, ​

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