A method and structure for anchoring and repairing dynamic cracks in concrete and mortar

Abstract

The present invention discloses a method and structure for anchoring and repairing dynamic cracks in concrete and mortar, and the method comprises the following steps: step 1: marking cracks; step 2: removing cracks on the surface of concrete or mortar, cutting and widening to form a V-shaped groove; step 3: marking the installation position of the T-shaped anchor in the V-shaped groove; step 4: drilling at the installation position of the T-shaped anchor marked in step 3, and the depth of the drilling is determined according to the length of the nail rod of the T-shaped anchor; step 5: cleaning the V-shaped groove and the drill hole; step 6: filling the drill hole with high viscosity chemical glue; step 7: installing the T-shaped anchor, and inserting the nail rod of the T-shaped anchor into the drill hole until the nail head of the T-shaped anchor contacts the groove wall of the V-shaped groove; step eight: filling the nail head of the T-shaped anchor with high viscosity chemical glue; step nine: filling the V-shaped groove with polymer cement mortar, and then cleaning the surface. The present invention achieves the purpose of repairing cracks in concrete and mortar.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a method and structure for anchoring and repairing dynamic cracks in concrete and mortar. Background Art

[0002] When cracks appear in concrete or mortar, the existing technology is to seal the cracks in concrete and mortar with resin, grout with resin, and fill the cracks with resin in V-shaped grooves. However, the disadvantage of these methods is that they cannot play a substantial restraining role in the control and expansion of cracks. They only seal, heal and fill the cracks in concrete, which requires high cleaning of the cracks, and also requires high interface cleaning and strength. The problem with surface sealing cracks, grouting crack filling, and V-shaped groove filling cracks is that dynamic cracks continue to appear. The interface is a weak node, and it is possible that one crack will turn into two cracks, and the crack problem cannot be completely solved.

[0003] To this end, the applicant submitted an invention patent application for concrete crack treatment technology to the State Intellectual Property Office of China on September 12, 2018, with application number CN201810584742.1. The technology includes the following steps: (1) design, select, and arrange high-strength restraint belts; (2) replicate the position of the high-strength restraint belts on the concrete surface; (3) punch holes and cut the buried position of the high-strength restraint belts; (4) clean the holes and cut the seams; (5) prepare resin and inject resin; (6) install the high-strength restraint belts; (7) close the high-strength restraint belts and the original cracks; wherein the high-strength restraint belts include two anchors and a connecting part connecting the anchors, wherein the material of the connecting part is a composite material of carbon fiber braided belts and resin. However, in actual use, the repair effect of the cracks is not very ideal. Summary of the invention

[0004] One of the technical problems to be solved by the present invention is to provide a method for anchoring and repairing dynamic cracks in concrete and mortar in view of the problems existing in the existing concrete and mortar dynamic crack repair. The method solves the problem of cracks in exterior walls, floors, concrete and mortar, and restrains the repeated expansion and contraction under the influence of temperature difference and changes in the dryness and wetness of the external air environment, causing dynamic changes in the increase and decrease of cracks, thereby achieving the purpose of repairing cracks in concrete and mortar.

[0005] The second technical problem to be solved by the present invention is to provide a structure for anchoring and repairing dynamic cracks in concrete and mortar in response to the problems existing in the existing concrete and mortar dynamic crack repair. It solves the problem of cracks in exterior walls, floors, concrete and mortar, and restrains the repeated expansion and contraction under the influence of temperature difference and changes in the dryness and wetness of the external air environment, causing dynamic changes in the increase and decrease of cracks, thereby achieving the purpose of repairing concrete and mortar cracks.

[0006] As a first aspect of the present invention, a method for anchoring and repairing dynamic cracks in concrete and mortar comprises the following steps:

[0007] Step 1: Identification of cracks;

[0008] Step 2: Remove cracks on the surface of concrete or mortar, cut and widen to form a V-shaped groove;

[0009] Step 3: Mark the T-shaped anchor installation position in the V-shaped groove;

[0010] Step 4: Drill holes at the T-type anchor installation positions marked in step 3. The depth of the holes is determined by the length of the T-type anchor rod.

[0011] Step 5: Clean the V-groove and drill hole;

[0012] Step 6: Filling the drill hole with high-viscosity chemical glue; the drill hole is fully filled with high-viscosity chemical glue;

[0013] Step 7: Install the T-shaped anchor nail, and insert the nail rod of the T-shaped anchor nail into the drilled hole until the nail head of the T-shaped anchor nail contacts the groove wall of the V-shaped groove;

[0014] Step 8: Fill the nail head of the T-shaped anchor with high-viscosity chemical glue;

[0015] Step 9: Fill the V-groove with polymer cement mortar and then clean the surface.

[0016] In a preferred embodiment of the present invention, in step 2, if there is a facing material, the facing material is removed along the crack with a width of about 10 cm.

[0017] In a preferred embodiment of the present invention, in step 2, a disc grinder equipped with a dust collector is used to remove cracks on the surface of the concrete or mortar, and cut and widen a V-shaped groove;

[0018] As a second aspect of the present invention, a structure for anchoring and repairing dynamic cracks in concrete and mortar comprises:

[0019] Remove cracks from the surface of concrete or mortar, cut and widen the V-shaped grooves;

[0020] A hole drilled at the bottom of the V-shaped groove;

[0021] High-viscosity chemical glue filling the holes;

[0022] a T-shaped anchor, wherein the rod of the T-shaped anchor is inserted into the hole, and the head of the T-shaped rivet is located in the V-shaped groove and contacts the groove wall of the V-shaped groove;

[0023] A high-viscosity chemical glue that fills the V-shaped groove and completely covers the nail head of the T-shaped anchor nail;

[0024] The polymer cement mortar is filled in the V-shaped groove and completely covers the high-viscosity chemical glue, and the polymer cement mortar fills the V-shaped groove.

[0025] In a preferred embodiment of the present invention, the outer peripheral surface of the nail rod of the T-shaped anchor is in a screw shape, a concave-convex shape, or a bamboo-shaped shape, so that the nail rod of the T-shaped anchor can be tightly combined with the hole wall through a high-viscosity chemical glue.

[0026] Due to the adoption of the above technical solution, the present invention considers the constraints from a three-dimensional perspective and uses a method of burying T-shaped anchors in the cracks to repair dynamic cracks, which is a repair method that constrains the behavior of the cracks.

[0027] The present invention solves the problem of cracks in exterior walls, floors, concrete and mortar by cutting V-shaped seams along the cracks, anchoring T-shaped anchors with chemical glue, and filling the V-shaped seams with polymer cement mortar. The invention restrains the dynamic changes of crack enlargement and reduction caused by repeated expansion and contraction under the influence of temperature differences and changes in the dryness and wetness of the external air environment, thereby achieving the purpose of repairing cracks in concrete and mortar.

[0028] The present invention adopts a method of cutting a V-shaped seam, installing a T-shaped anchor and chemical glue anchoring, and filling the V-shaped seam with polymer cement mortar. A V-shaped seam is made by weakening the crack concrete and mortar, and then T-shaped anchors and chemical glue are buried and installed at regular intervals along the crack to anchor the crack. The cracking behavior is restrained by the buried T-shaped anchors, and the V-shaped cutting position of the T-shaped anchor is filled with polymer cement mortar, and its performance is similar to that of a concrete structure.

[0029] The high viscosity chemical glue of the present invention fills the hole, so that the nail rod of the T-shaped anchor in the hole becomes a rebar-planting state, and the outer peripheral surface of the nail rod of the T-shaped anchor is in a screw shape, a concave-convex shape, or a bamboo-shaped shape. In this way, the nail rod of the T-shaped anchor can be tightly combined with the hole wall through the high viscosity chemical glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure for anchoring and repairing dynamic cracks in concrete and mortar. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] See also Figure 1 A method for anchoring and repairing dynamic cracks in concrete and mortar of the present invention comprises the following steps:

[0033] Step 1: Identification of the crack 10;

[0034] Step 2: Use a disc grinder equipped with a dust collector to remove cracks on the surface of the concrete or mortar, cut and widen a V-shaped groove 20; if there is a finishing material, such as a tile, remove the finishing material along the crack 10 by about 10 cm in width.

[0035] Step 3: Mark the installation position of the T-shaped anchor 30 in the V-shaped groove 20;

[0036] Step 4: Drill a hole 40 at the installation position of the T-shaped anchor 30 marked in step 3. The depth of the hole 40 is determined according to the length of the nail rod of the T-shaped anchor 30.

[0037] Step 5: Clean the V-groove 20 and the drill hole 40;

[0038] Step 6: Fill the drill hole 40 with high-viscosity chemical glue 50; the high-viscosity chemical glue 50 fills the drill hole 40, so that the nail rod 31 of the T-shaped anchor nail 30 in the hole becomes a rebar-embedded state;

[0039] Step 7: Install the T-shaped anchor 30, and insert the nail rod 31 of the T-shaped anchor 30 into the drill hole 40 until the nail head 32 of the T-shaped anchor 30 contacts the groove wall of the V-shaped groove 20; the outer peripheral surface of the nail rod 31 of the T-shaped anchor 30 is screw-shaped or concave-convex or bamboo-shaped. In this way, the nail rod 31 of the T-shaped anchor 30 can be tightly combined with the hole wall of the drill hole 40 through the high-viscosity chemical glue 50;

[0040] Step 8: Fill the nail head 32 of the T-shaped anchor nail 30 with high viscosity chemical glue 60;

[0041] Step nine: Fill the V-shaped groove 20 with polymer cement mortar 70, and then clean the surface to finally form a structure for anchoring and repairing dynamic cracks in concrete and mortar.

Claims

1. A method for anchoring and repairing dynamic cracks in concrete and mortar, characterized in that: The steps include: Step 1: Identification of cracks; Step 2: Remove cracks on the surface of concrete or mortar, cut and widen to form a V-shaped groove; Step 3: Mark the T-shaped anchor installation position in the V-shaped groove; Step 4: Drill holes at the T-type anchor installation positions marked in step 3. The depth of the holes is determined by the length of the T-type anchor rod. Step 5: Clean the V-groove and drill hole; Step 6: Filling the drill hole with high-viscosity chemical glue; the drill hole is fully filled with high-viscosity chemical glue; Step 7: Install the T-shaped anchor and insert the nail rod of the T-shaped anchor into the drilled hole until the nail head of the T-shaped anchor contacts the groove wall of the V-shaped groove; the outer peripheral surface of the nail rod of the T-shaped anchor is in a screw shape or a concave-convex shape or a bamboo-shaped shape; in this way, the nail rod of the T-shaped anchor can be tightly combined with the hole wall through high-viscosity chemical glue; Step 8: Fill the nail head of the T-shaped anchor with high-viscosity chemical glue; Step 9: Fill the V-groove with polymer cement mortar and then clean the surface.

2. A method for anchoring and repairing dynamic cracks in concrete and mortar as claimed in claim 1, characterized in that: In step 2, if there is finishing material, remove 10 cm wide of the finishing material along the crack.

3. A method for anchoring and repairing dynamic cracks in concrete and mortar as claimed in claim 1, characterized in that: In step 2, use a disc grinder equipped with a dust collector to remove cracks in the concrete or mortar surface and cut and widen the V-shaped groove.

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