Leakage type crack repairing structure for overflow surface concrete

Abstract

A leakage type crack repairing structure of overflow face concrete comprises a crack and a groove formed in the surface of the concrete, and the groove is communicated with the crack. Flow guide holes and grouting holes are downwards drilled in the two sides of the crack from the surface of the concrete, the flow guide holes and the grouting holes are not communicated, and the groove is filled with a repairing material. According to the repairing structure, the service life of the crack repairing position can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete crack repair, in particular to a leakage type crack repair structure of overflow surface concrete. Background Art

[0002] Over the long term, the mechanical and durability properties of hydraulic structures gradually deteriorate. External forces and environmental factors can lead to cracks, leakage, and erosion. If these defects, especially cracks, are not promptly addressed, they can develop into deep or penetrating cracks, threatening the safety of the concrete structure.

[0003] Common crack treatment methods include spraying, filling, and grouting, with grouting being particularly widely used. Common crack repair methods primarily involve sealing the cracks with patching materials, followed by a coating of impermeable or abrasion-resistant materials to protect the repaired concrete crack surface. However, for leaky cracks in overflow concrete, conventional crack structures and surface repair materials are susceptible to peeling, damage, and erosion under prolonged water flow, limiting the durability and effectiveness of the repair. Utility Model Content

[0004] The utility model provides a leakage type crack repair structure for overflow surface concrete, so as to solve the problem of poor durability of crack repair.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A leak-type crack repair structure for overflow surface concrete, comprising a crack and a groove excavated on the concrete surface, wherein the groove is connected to the crack;

[0007] Diversion holes and grouting holes are drilled downward from the concrete surface on both sides of the crack. The diversion holes and the grouting holes are not connected, and the groove is filled with repairing materials.

[0008] Furthermore, the groove is provided with steel anchor bars and distribution bars arranged therein, the steel anchor bars are driven into the bottom wall of the groove, and the distribution bars are fixed to the steel anchor bars by being tied therein.

[0009] Furthermore, an interface layer is formed between the repair material and the side wall of the groove.

[0010] Furthermore, the repair material is elastic epoxy mortar.

[0011] Furthermore, the surface of the repair material is flush with the surface of the concrete, and the surface of the concrete is coated with a waterproof and wear-resistant layer, which at least covers the surfaces of the grooves, grouting holes and diversion holes.

[0012] Furthermore, the material of the waterproof and wear-resistant layer is hand-scraped polyurea.

[0013] Furthermore, the width of the groove gradually decreases from the depth of the crack toward the concrete surface.

[0014] Furthermore, the insertion depth of the diversion hole is deeper than the insertion depth of the grouting hole, and both the diversion hole and the grouting hole are connected to the crack.

[0015] The utility model can achieve the following beneficial effects:

[0016] 1. Compared with the existing crack repair structure, the utility model provides a comprehensive crack repair structure, which not only uses grouting holes to seal deep cracks, but also, in order to overcome the shortcomings of conventional repair methods in which the concrete on the crack surface is easily eroded and damaged by scouring, grooves are dug on the crack surface and filled with repair materials, thereby improving the anti-wear performance of the overflow surface and enhancing the durability of the overall repair effect.

[0017] 2. Setting steel anchor bars and distribution bars in the groove can enhance the structural strength of the repair material and increase the service life of the repair area.

[0018] 3. Setting a waterproof and wear-resistant layer on the concrete surface can seal the diversion holes and grouting holes, while protecting the repair materials and reducing the erosion and corrosion of the repair materials by water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic cross-sectional view of a leak-type crack repair structure for overflow surface concrete according to the present invention;

[0021] Figure 2 It is a planar schematic diagram of a leakage type crack repair structure of overflow surface concrete according to the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] 1. Cracks; 2. Grooves; 3. Diversion holes; 4. Grouting holes; 5. Repair materials; 6. Steel anchor bars; 7. Distribution bars; 8. Waterproof and wear-resistant layer. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0025] like Figure 1 and Figure 2 As shown, a leakage-type crack repair structure for overflow surface concrete includes a crack 1. After determining the position of the crack 1, the crack 1 is centered as much as possible, and then a groove 2 is formed on the concrete surface along the length direction of the crack 1. The groove 2 is connected to the crack 1, and the width of the groove 2 gradually decreases from the depth of the crack 1 to the concrete surface. The cross-section of the groove 2 can be trapezoidal.

[0026] On the concrete surface, diversion holes 3 and grouting holes 4 are drilled from both sides of the crack 1 into the interior of the concrete structure. The diversion holes 3 and grouting holes 4 are set on both sides of the crack 1. The diversion holes 3 are not connected with the grouting holes 4, and the bottom depth of the diversion hole 3 is deeper than the bottom depth of the grouting hole 4. The diversion holes 3 and the grouting holes 4 are both drilled obliquely into the concrete structure and connected with the crack 1.

[0027] During the use of hydraulic structures, a large amount of water will leak into the crack 1. This water is first drained through the diversion hole 3 to reduce the water pressure. After the water is completely drained, grouting material is then injected into the crack 1 through the grouting hole 4 to seal the crack 1. The grouting material can be epoxy resin or water-soluble polyurethane. When draining the water through the diversion hole 3, a diversion pipe is first inserted into the diversion hole 3. Through the diversion pipe, a small drainage device is used to drain the water from the crack 1. When drilling the grouting hole 4, the inclination angle is 45° to 60°, the hole diameter is set to 16 mm, and the grouting hole 4 penetrates the crack surface to a depth of no less than 5 cm. Along the length of the crack 1, the grouting holes 4 are spaced 0.6 to 1.0 m apart. The holes are arranged crosswise on both sides of the groove 2, and the grouting holes 4 are arranged inside the diversion hole 3.

[0028] Since there is water leakage in crack 1, which is a relatively humid environment, the main consideration is to use grouting materials such as water-soluble polyurethane or epoxy resin. These materials have better adhesion in a humid environment, thereby achieving a better sealing effect.

[0029] The bottom wall of groove 2 is also drilled with anchor holes spaced evenly apart, into which steel anchor bars 6 are vertically inserted. In one embodiment, the anchor holes have a diameter of 18 mm, a pitch of 30 cm, and a depth of 20 cm. The holes are cleaned promptly after drilling. Before inserting the steel anchor bars 6 into the anchor holes, a layer of interface agent is first applied to the groove wall of groove 2 to form an interface layer. Anchoring agent is then applied to the steel anchor bars 6 before they are inserted into the anchor holes, thereby improving the bond between the steel anchor bars 6 and the concrete. Distribution bars 7 are horizontally tied to the steel anchors and laid along the length of the crack 1.

[0030] After the steel anchor bars 6 and distribution bars 7 are installed within the groove 2, the repair material 5 is poured into the groove 2. After filling, the surface of the repair material 5 is flush with the concrete surface. In the preferred embodiment, elastic epoxy mortar is used for the repair material 5. Due to its strong adhesion, good deformation tolerance, and wear resistance, elastic epoxy mortar can better consolidate with the surrounding old concrete to form a single piece. After the repair material 5 is filled into the groove 2, it is used to simultaneously seal the diversion hole 3 and the grouting hole 4.

[0031] The concrete surface of hydraulic structures is often impacted by water flow and is easily eroded. In particular, the newly poured shallow surface concrete is very easy to peel and break under the action of erosion. The method of planting steel bars combined with pouring elastic epoxy mortar can repair cracks 1 while avoiding erosion and damage of the grouting material in cracks 1.

[0032] After the poured repair material 5 solidifies, a layer of hand-scraped polyurea is applied on the concrete surface to form a waterproof and wear-resistant layer 8. The waterproof and wear-resistant layer 8 extends a certain distance along both sides of the groove 2 until the waterproof and wear-resistant layer 8 completely covers the grouting holes 4 and the diversion holes 3.

[0033] By applying anti-abrasion materials such as polyurea, the anti-abrasion properties of the concrete surface can be enhanced, especially at the junction of new and old concrete and at the drilling locations, to provide anti-abrasion protection.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A leak-type crack repair structure for overflow surface concrete, characterized by: It comprises a crack (1) and a groove (2) cut on the concrete surface, wherein the groove (2) is connected to the crack (1); A diversion hole (3) and a grouting hole (4) are drilled downward from the concrete surface on both sides of the crack (1); the diversion hole (3) and the grouting hole (4) are not connected; and the groove (2) is filled with a repair material (5).

2. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: The groove (2) is provided with steel anchor bars (6) and distribution bars (7) arranged therein, the steel anchor bars (6) are driven into the bottom wall of the groove (2), and the distribution bars (7) are fixedly tied to the steel anchor bars (6).

3. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: An interface layer is formed between the repair material (5) and the side wall of the groove (2).

4. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: The repair material (5) is elastic epoxy mortar.

5. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: The surface of the repair material (5) is flush with the surface of the concrete, and the surface of the concrete is coated with a waterproof and wear-resistant layer (8), and the waterproof and wear-resistant layer (8) at least covers the surfaces of the groove (2), the grouting hole (4) and the diversion hole (3).

6. The leak-type crack repair structure for overflow surface concrete according to claim 5, characterized in that: The material of the waterproof and wear-resistant layer (8) is hand-scraped polyurea.

7. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: The width of the groove (2) gradually decreases along the direction from the depth of the crack (1) to the concrete surface.

8. The leak-type crack repair structure for overflow surface concrete according to claim 1, characterized in that: The insertion depth of the diversion hole (3) is deeper than the insertion depth of the grouting hole (4), and both the diversion hole (3) and the grouting hole (4) are connected to the crack (1).

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