Repair structure for concrete leakage position

Abstract

The repairing structure for the concrete leakage position comprises a crack, and a sealing layer, a sealing layer and a temporary water plugging layer which are arranged layer by layer from the interior of the crack to the exterior; the crack comprises an original crack and a straddle groove, the straddle groove is formed in the surface of concrete, the sealing layer is smeared and compacted at the joint of the straddle groove and the original crack, the original crack is filled with the sealing layer, and the straddle groove is filled with the temporary water plugging layer. The service life of underwater structure leakage repairing can be prolonged.

Description

Technical Field

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

[0002] In recent years, with the development of underwater repair materials, the performance of underwater materials has gradually improved, and the corresponding underwater construction equipment has also become simpler. For leaking structural joints that have been underwater for a long time, underwater repair is often required. However, underwater repair is difficult, the process is complicated, and the repair effect is difficult to guarantee. Utility Model Content

[0003] The utility model provides a repair structure for concrete leakage, so as to solve the problem that underwater concrete repair is difficult.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A repair structure for concrete leakage, comprising a crack, and a sealing layer, a sealing layer and a temporary water blocking layer arranged layer by layer from the inside of the crack to the outside;

[0006] The cracks include original cracks and cross-joint grooves. The cross-joint grooves are opened on the concrete surface. The sealing layer is applied and compacted at the junction of the cross-joint grooves and the original cracks. The sealing layer is filled in the original cracks. The temporary water blocking layer is filled in the cross-joint grooves.

[0007] Furthermore, it also includes a flexible protective layer covering the concrete surface, the flexible protective layer is wrapped around the temporary water blocking layer, and anchors for fixing the flexible protective layer and the concrete surface are provided on the circumference of the flexible protective layer.

[0008] Furthermore, an interface layer is applied between the periphery of the flexible protective layer and the concrete structure, and between the temporary water blocking layer and the wall of the seam slot.

[0009] Furthermore, the width of the seam-riding groove gradually increases in a direction away from the original crack.

[0010] Furthermore, the sealing layer is formed by injection molding using a water-soluble polyurethane grouting material.

[0011] Furthermore, the filling material of the temporary water blocking layer is a plastic water-stopping material.

[0012] Furthermore, the coating material of the interface layer is underwater modified epoxy material.

[0013] Furthermore, the sealing layer is grout-filled after the construction of the sealing layer is completed.

[0014] The utility model can achieve the following beneficial effects:

[0015] 1. This application forms a seam groove on the concrete surface and repairs the cracks through a sealing layer and a sealing layer to solve the problem of leakage in the concrete structure; waterproofing of the crack repair site is achieved through a temporary water blocking layer to reduce the damage of the water environment to the crack repair structure. The two-part sealing system can increase the service life of the crack repair structure in the underwater environment.

[0016] 2. Setting up a flexible protective layer can further achieve waterproofing and protection of the cracks, making it difficult for underwater impurities to scour the crack repair structure and thus damage the crack repair structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 The utility model is a planar schematic diagram of a repair structure for concrete leakage.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1. Sealing layer; 2. Sealing layer; 3. Temporary water blocking layer; 4. Cracks; 41. Original cracks; 42. Riding groove; 5. Flexible protective layer; 6. Anchor; 7. Interface layer. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1 As shown, a repair structure for concrete leakage includes a crack 4, and a sealing layer 1, a sealing layer 2, a temporary water blocking layer 3 and a flexible protective layer 5 are arranged layer by layer from the inside of the crack 4 to the outside; the crack 4 includes original cracks 41 and a riding groove 42 that are interconnected. The riding groove 42 is cut on the concrete surface by an underwater hydraulic cutting machine when repairing the crack 4. The width of the riding groove 42 gradually increases in the direction away from the original crack 41. The riding groove 42 can be specifically V-shaped, with a maximum groove width of 80 mm and a groove depth of 60 mm.

[0023] Among them, the sealing layer 1 is filled in the original crack 41 and is formed by grouting water-soluble polyurethane grouting material; the sealing layer 2 is arranged at the junction of the seam groove 42 and the original crack 41 and is filled with underwater rapid sealing material; the temporary water blocking layer 3 is filled in the seam groove 42 and is filled with plastic water-stopping material.

[0024] The flexible protective layer 5 is covered on the surface of the crack 4 with a rubber-like flexible waterproof material, and the flexible protective layer 5 is fixed to the concrete using anchors 6 on the sides. The anchors 6 can specifically be stainless steel strips and stainless steel expansion bolts, etc. The anchor spacing is set to 300mm.

[0025] An interface layer 7 is also applied between the flexible protective layer 5 and the surface of the concrete structure, between the temporary water blocking layer 3 and the wall of the seam groove 42, and around the side of the anchor 6. The coating material of the interface layer 7 adopts underwater modified epoxy material. The interface layer 7 on the concrete surface realizes underwater sealing of the flexible protective layer 5 and the anchor 6, thereby forming a waterproof structure mainly composed of the temporary water blocking layer 3 and the flexible protective layer 5, reducing the impact of underwater environmental factors on the life of the repaired structure of this application.

[0026] The concrete leakage repair structure of the present invention is designed with a two-part closing system. One part effectively handles the leakage problem of concrete cracks 4 through the closing layer 1 and the sealing layer 2; the second part can not only play an anti-seepage role but also effectively protect the sealing layer 2 through the closing of the temporary water blocking layer 3 and the flexible protective layer 5, reducing the impact of the underwater environment on the sealing layer 2 and the closing layer 1. The two-part closing system of the present invention can provide more reliable protection for the underwater repair of cracks 4 in concrete structures.

[0027] When repairing the concrete leakage in this application, the following construction steps are used:

[0028] Step 1: A diver carries an underwater camera to record the crack 4 at the leakage location, marks the specific location, and uses the underwater tracer suction speed to determine the leakage situation at the crack 4.

[0029] Step 2: A diver carries an underwater hydraulic cutting machine and cuts a seam-riding groove 42 along the crack 4 to be treated from bottom to top.

[0030] Step 3: The diver enters the water with a high-pressure water gun to the crack 4 to be repaired and flushes along the crack 4 from top to bottom. At the same time, the concrete base surface is cleaned and polished to a smooth surface. The cleaning, polishing, and leveling area around the crack 4 is 60 cm. The treatment around the crack 4 must ensure that the concrete base surface is clean and smooth when the flexible protective layer 5 is later applied to ensure a good adhesion.

[0031] Step 4: After cleaning is complete, the staff exits the water. After the water has settled, the staff uses a high-pressure water gun to flush the concrete base again, marking the defective holes within the cleaned area. The water must settle for at least three hours. The filling material for the sealing layer 2 is weighed and mixed on shore according to the proportions. It is then rolled into balls or strips depending on the size of the defective holes, introduced into the water, and filled into the bottom of the slot 42 along the direction of the crack 4. The filling must be pressed tightly. After filling is completed, the surface of the sealing layer 2 is leveled.

[0032] The filling sealing layer 2 is filled with underwater rapid sealing material, which is a two-component underwater repair material with an initial setting time in water greater than or equal to 5 minutes, a final setting time less than or equal to 25 minutes, a compressive strength greater than 20 MPa one day after curing, and a bonding strength with concrete greater than or equal to 1.2 MPa.

[0033] Step 5: After the sealing layer 2 is constructed, grouting holes are drilled on the surface of the sealing layer 2 along the extension direction of the crack 4. After the holes are drilled, grouting pipes with a diameter of 8 to 10 mm are inserted. The grouting pipes will be used in subsequent steps to inject water-soluble polyurethane grouting material into the original crack 41 to form the sealing layer 1 within the original crack 41. The grouting holes are drilled at a spacing of 60 cm and a depth of 10 cm.

[0034] Step 6: After the strength of the sealing layer 2 meets the requirements, start the water pressure inspection from the lowest grouting pipe, seal each grouting pipe, observe the leakage at a pressure of 0.3-0.5MPa, and confirm that there is no leakage on the seam surface before proceeding with the subsequent grouting work. If leakage is found, re-seal it and re-test the pressure until all are qualified.

[0035] Step 7: Prepare water-soluble polyurethane chemical grouting on the water-based work platform, using an electric chemical grouting pump. The grouting pump is first connected to the lowest grouting pipe and grouts the water-soluble polyurethane slurry from bottom to top. The grouting pressure is controlled at 0.3-0.5 MPa depending on the water depth. If excessive grouting occurs during the grouting process, measures such as adding a catalyst and intermittent grouting can be used to control the grouting volume.

[0036] The water-soluble polyurethane chemical grouting material has a bonding strength in water greater than 0.7 MPa, a tensile strength greater than 2.1 MPa, and a gel time that can be adjusted from a few minutes to several tens of minutes.

[0037] Step 8: 24 hours after the grouting is completed, remove the grouting pipe and clean the concrete base surface again.

[0038] Step 9: With each operation section being 1 to 2 m, apply underwater adhesive to the wall of the seam groove 42 and the surrounding concrete surface to form an interface layer 7. The application process must be careful and the coating thickness must be uniform without any gaps. Low-lying areas can be repaired and leveled before application.

[0039] The underwater adhesive is applied to the seam and surrounding concrete surface with a width of 60cm. The underwater adhesive is an underwater modified epoxy material, which is mainly epoxy resin and is made by adding a series of additives such as toughening agents, activators, and curing agents. The underwater bonding strength is greater than 2.5MPa.

[0040] Step 10: After the underwater adhesive is dry, divers will fill and level the plastic water-stopping material along the seam groove 42 to form a temporary water-blocking layer 3. The surface of the plastic water-stopping material and the concrete base surface will smoothly transition to ensure that the surface flexible protective layer 5 is well bonded to the concrete base surface.

[0041] Step 11: Paste the flexible protective layer 5 on the underwater seam surface from bottom to top. First, hang the flexible protective layer 5 on the pre-installed expansion bolts, then drive water from the middle to both sides to make the flexible protective layer 5 stick tightly to the concrete base surface, and fix it with stainless steel strips and stainless steel expansion bolts.

[0042] The surface flexible protective layer 5 is made of rubber-like flexible waterproof material, which is pre-processed into a 60 cm wide strip and pasted along the seam from bottom to top. When pasting, the flatness of the concrete on both sides of the seam is taken into consideration.

[0043] Step 12: Use underwater adhesive to seal the edges of the flexible protective layer 5 and the anchoring piece 6, and ensure that the edge sealing is tight.

[0044] 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 repair structure for concrete leakage, characterized in that: It includes a crack (4), and a sealing layer (1), a sealing layer (2) and a temporary water blocking layer (3) arranged layer by layer from the inside of the crack (4) to the outside; The crack (4) comprises an original crack (41) and a seam groove (42), the seam groove (42) being opened on the concrete surface, the sealing layer (2) being applied and compacted at the junction of the seam groove (42) and the original crack (41), the sealing layer (1) being filled in the original crack (41), and the temporary water blocking layer (3) being filled in the seam groove (42).

2. A repair structure for concrete leakage according to claim 1, characterized in that: It also includes a flexible protective layer (5) covering the concrete surface, the flexible protective layer (5) covering the temporary water blocking layer (3), and an anchor (6) for fixing the flexible protective layer (5) and the concrete surface is provided on the circumference of the flexible protective layer (5).

3. The repair structure for concrete leakage according to claim 2, characterized in that: An interface layer (7) is applied between the periphery of the flexible protective layer (5) and the concrete structure, and between the temporary water blocking layer (3) and the wall of the seam-riding groove (42).

4. The repair structure for concrete leakage according to claim 1, characterized in that: The width of the seam-riding groove (42) gradually increases in a direction away from the original crack (41).

5. The repair structure for concrete leakage according to claim 1, characterized in that: The sealing layer (1) is formed by injection molding using a water-soluble polyurethane grouting material.

6. The repair structure for concrete leakage according to claim 3, characterized in that: The filling material of the temporary water blocking layer (3) is a plastic water-stopping material.

7. The repair structure for concrete leakage according to claim 3, characterized in that: The coating material of the interface layer (7) is underwater modified epoxy material.

8. The repair structure for concrete leakage according to claim 1, characterized in that: The sealing layer (1) is grout-filled after the construction of the sealing layer (2) is completed.

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