Repairing and reinforcing method and structure for insufficient pasting area of thermal insulation layer

Abstract

The invention relates to the technical field of building repairing, in particular to a repairing and reinforcing method for insufficient pasting area of a thermal insulation layer, which comprises the following steps: calibrating a reinforcing position, cutting and slotting, repairing and reinforcing, and backfilling the thermal insulation layer, and specifically, increasing the pasting area of an outer wall and the thermal insulation layer through slotting and grouting. The negative wind load resistance of the heat preservation layer is enhanced by arranging gridding cloth or heat preservation nails, vertical supporting is provided for the heat preservation layer by arranging angle steel, it is ensured that the heat preservation plate can bear the weight of the heat preservation plate and extra loads such as walking of people, and the reinforcing method provides two grooving modes of a through rectangular through groove and a round groove, and point-line combination is achieved; and the repairing and reinforcing effect is comprehensively enhanced in a covering manner.

Description

Technical Field

[0001] The present invention relates to the technical field of building repair, and in particular to a repair and reinforcement method and structure for an insufficient bonding area of ​​a thermal insulation layer. Background Art

[0002] External wall insulation is an important part of modern building energy-saving design, which aims to improve the thermal performance of buildings, reduce energy consumption, and enhance the comfort of living or working environment. In order to save material costs, external wall insulation is usually pasted by point bonding method (i.e., adhesive is only applied in the four corners and the middle of the back of the insulation board).

[0003] The point-bonding method has relatively low bonding strength and stability due to insufficient bonding area. The insulation layer may become hollow and cracked after long-term use or under negative wind loads, which affects the insulation performance of the building and poses a safety hazard. In the prior art, the repair methods of the exterior wall insulation layer mostly focus on the hollowing of the insulation layer. For the repair and reinforcement of the insulation layer that has not experienced hollowing or shedding problems but has insufficient bonding area and poses a safety hazard, prior art such as CN110656706 "A non-destructive repair method for exterior wall insulation layer and exterior wall insulation structure" and CN110821198 "A method for preventing and controlling the shedding of exterior wall insulation mortar of a high-rise building" both use anchor bolts to strengthen and fix the exterior wall. However, it is worth considering that on the one hand, the anchor has sealing problems that affect the insulation performance, and on the other hand, the anchor is usually visible, especially when metal anchors are used, which affects the appearance of the building, and there are certain limitations.

[0004] Therefore, in order to solve the above problems, a relevant solution that better meets the usage requirements needs to emerge. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a repair and reinforcement method and structure for insufficient adhesion area of ​​the insulation layer to solve the above-mentioned problem.

[0006] Based on the above objectives, the present invention provides two methods for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer.

[0007] The first repair and reinforcement method includes the following steps: S1: Mark the reinforcement position. Mark the reinforcement position in the middle of the exterior wall between adjacent floor slabs, remove the decorative layer and the outer mortar layer at the corresponding reinforcement position, and expose the original insulation board; S2: Cutting and grooving: using a cutting machine to open a rectangular through groove on the exposed original insulation board at the marked position; the insulation material cut from the rectangular through groove is the separated insulation board; the side of the separated insulation board is leveled and placed for standby use; the depth of the rectangular through groove is the thickness of the original insulation board; after the rectangular through groove is opened, the outer wall surface is exposed; the exposed outer wall surface is polished and rinsed; S3: Repair and reinforcement: a layer of bonding mortar is fully applied on the exposed outer wall surface and the top and bottom surfaces of the rectangular through groove to form a first bonding mortar layer. There is a gap between the original insulation board and the outer wall. The bonding mortar flows into the gap and forms a bonding mortar expansion head in the gap. The first mesh cloth is fully spread on the first bonding mortar layer, and the second bonding mortar layer is fully applied on the first mesh cloth. The second bonding mortar layer covers the first mesh cloth. After the bonding mortar layer is cured, angle steels are placed on the inner side of the top of the second bonding mortar layer at intervals. S4: Backfill the insulation layer. Fill the separated insulation board back into the corresponding rectangular groove. Apply the first plaster mortar layer on the surface of the separated insulation board and the original insulation board. Spread the second mesh cloth on the surface of the first plaster mortar layer. Apply the second plaster mortar layer and cover the second mesh cloth and level it. After the plaster mortar layer is cured, the repair and reinforcement work can be completed.

[0008] Optionally, the rectangular through groove in step S2 and step S3 has a height of 100 mm to 150 mm and is opened along the width direction of the outer wall.

[0009] Optionally, in step S3, the first mesh cloth forms two turning parts inside the rectangular through groove, and the upper and lower ends of the first mesh cloth both extend beyond the top and bottom of the rectangular through groove. The extending parts of the ends of the first mesh cloth are folded over and temporarily fixed to the outer surface of the original insulation board, and are covered by the first plaster mortar layer in step S4.

[0010] Optionally, the angle steels in step S3 are arranged throughout the rectangular through slot, with an arrangement spacing of 3m to 5m.

[0011] The second repair and reinforcement method includes the following steps: S1: Mark the reinforcement position. Mark the reinforcement position at a certain interval along the height and horizontal direction on the outer surface of the original insulation board, and pay attention to avoid the junction between the floor slab and the outer wall. Remove the decorative layer and outer mortar layer at the corresponding reinforcement position to expose the original insulation board; S2: Cutting and grooving: using an electric drill to open a circular groove on the original insulation board at the marked position. The depth of the circular groove is equal to the thickness of the original insulation board. After the circular groove is opened, the outer wall surface is exposed, and the exposed outer wall surface is polished and rinsed; S3: Repair and reinforcement: fully apply bonding mortar on the exposed outer wall surface and the circumference of the circular groove side to form a bonding mortar layer. The bonding mortar flows into the gap between the original insulation board and the outer wall to form a bonding mortar expansion head. After the bonding mortar layer is cured, insulation nails matching the circular groove are placed in the circular groove; S4: Backfill the insulation layer. Backfill the new insulation material into the circular groove and level the surface. Apply the first plaster mortar layer on the new insulation material and the original insulation board surface. Spread the second mesh cloth on the surface of the first plaster mortar layer. Apply the second plaster mortar layer and cover the second mesh cloth and level it. The repair and reinforcement work can be completed after the plaster mortar layer solidifies.

[0012] Optionally, in step S1, the reinforcement position calibration interval is 1m~1.5m.

[0013] Optionally, the diameter of the circular groove in step S2 and step S3 is 100 mm to 150 mm.

[0014] Optionally, the insulation nail described in step S3 includes a plastic pressure cap that is adapted to the shape of the circular groove. The plastic pressure cap is embedded in the bonding mortar layer and fits the bottom and side circumference of the bonding mortar layer. The plastic pressure cap is folded over and fits the outer surface of the original insulation board when it is exposed from the bonding mortar layer. The fitted part is covered by the first plastering mortar layer in step S4. The bottom center of the plastic pressure cap is fixed in the bonding mortar layer by a nail rod. The end of the nail rod is fixedly connected to a plastic expansion tube. The plastic expansion tube penetrates the plastic pressure cap and the bonding mortar layer and enters the exterior wall to a certain depth.

[0015] Furthermore, the above two repair and reinforcement methods are used in combination to form a repair and reinforcement structure with insufficient insulation layer adhesion area. Beneficial Effects

[0016] 1. In view of the insufficient bonding area of ​​the insulation layer by the point bonding method, the present invention provides a repair and reinforcement method by opening rectangular through grooves. This method increases the bonding area between the exterior wall and the insulation layer by slotting and grouting, increases the negative wind load resistance of the insulation layer by arranging a mesh cloth with a turning portion in the groove, and provides vertical support for the insulation layer by arranging angle steels to ensure that the insulation board can withstand its own weight and additional loads such as people walking, thereby completing the repair and reinforcement of the exterior wall insulation layer with insufficient bonding area.

[0017] 2. The present invention provides a repair and reinforcement method by opening a circular groove. The method increases the bonding area between the exterior wall and the insulation layer by grooving and grouting, and fixes the relative position of the insulation layer and the exterior wall by anchoring with insulation nails to prevent the insulation layer from hollowing and cracking under negative wind loads.

[0018] 3. The present invention combines the above two methods to form a repair and reinforcement structure, which combines points and lines and comprehensively covers to enhance the repair and reinforcement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of calibrating the reinforcement position of a rectangular through groove according to the present invention; Figure 2 A schematic diagram of cutting and opening a rectangular through groove according to the present invention; Figure 3 It is a cross-sectional schematic diagram of the rectangular through groove repair and reinforcement of the present invention; Figure 4 This is a schematic diagram of backfilling the thermal insulation layer of a rectangular through groove according to the present invention; Figure 5 A schematic diagram of calibrating the circular groove reinforcement position of the present invention; Figure 6 A schematic diagram of the invention for cutting and opening a circular groove; Figure 7 It is a cross-sectional schematic diagram of the circular groove repair and reinforcement of the present invention.

[0021] Markings in the figure are: 1. exterior wall; 2. floor slab; 3. original insulation board; 4. gap; 5. rectangular through groove; 6. cut insulation board; 7. first mesh cloth; 8. angle steel; 9. second mesh cloth; 10. bonding mortar layer; 101. first bonding mortar layer; 102. second bonding mortar layer; 11. plastering mortar layer; 111. first plastering mortar layer; 112. second plastering mortar layer; 12. plastic expansion tube; 13. circular groove; 14. insulation nail; 15. plastic pressure cap; 16. nail rod. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. Embodiment 1:

[0023] Reference Figure 1~Figure 4 A method for repairing and reinforcing an insufficiently adhered insulation layer includes the following steps: S1. Mark the reinforcement position, such as Figure 1 As shown, the outer side of the exterior wall 1 is pasted with the original insulation board 3 by point-bonding method, and there is a gap 4 between the original insulation board 3 and the exterior wall 1. The middle position of each floor is the reinforcement position. The decorative layer and the outer mortar layer at the corresponding reinforcement position are removed to expose the original insulation board 3; S2, cutting and grooving, such as Figure 2As shown, a rectangular through groove 5 with a height of 100 mm to 150 mm is opened on the original insulation board 3 at the reinforcement position using a cutting machine. The rectangular through groove 5 is opened along the width direction of the outer wall 3. The insulation board 6 is removed from the rectangular through groove 5 and retained. The depth of the rectangular groove 5 is the thickness of the original insulation board 3. After the rectangular groove 5 is opened, the surface of the outer wall 1 is exposed, and the exposed surface of the outer wall 1 is polished and rinsed. S3, repair and reinforcement, such as Figure 3 As shown, a layer of bonding mortar is fully applied on the exposed surface of the outer wall 1 and the top and bottom surfaces of the rectangular through groove 5 to form a first bonding mortar layer 101. The bonding mortar flows into the gap 4 to form a bonding mortar enlarged head. The first mesh cloth 7 is fully spread on the first bonding mortar layer 101, and then the second bonding mortar layer 102 is fully applied to cover the first mesh cloth 7. The first mesh cloth 7 forms two turning parts inside the rectangular through groove 5. The upper and lower ends of the first mesh cloth 7 both exceed the top and bottom of the rectangular through groove 5. The exceeding part of the end of the first mesh cloth 7 is folded and temporarily fixed on the outer surface of the original insulation board 3. After the bonding mortar layer is cured, angle steels 8 are placed every 3m~5m on the inner side of the top of the second bonding mortar layer 102. S4, backfill the insulation layer, such as Figure 4 As shown, the severed insulation board 6 is filled back into the corresponding rectangular groove 5, and the first plaster mortar layer 111 is fully coated on the surface of the severed insulation board 6 and the original insulation board 3. The first plaster mortar layer 111 covers the end of the first mesh cloth 7 folded over to the outer surface of the original insulation board 3 in step S3, and the second mesh cloth 9 is fully spread on the surface of the first plaster mortar layer 111. Then, the second plaster mortar layer 112 is fully coated to cover the second mesh cloth 9 and level it. After the plaster mortar layer is cured, the repair and reinforcement work can be completed.

[0024] Reinforcement principle: The bonding mortar layer and the enlarged head of the bonding mortar layer formed by flowing into the gap 4 increase the bonding area between the exterior wall 1 and the original insulation board 3. The first mesh cloth 7 is used to prevent the original insulation board 3 from hollowing and cracking under negative wind load. The angle steel 8 is used to provide vertical support for the insulation board to ensure that the insulation board can withstand its own weight and possible additional loads, such as the covering layer or the movement of people. Embodiment 2:

[0025] Reference Figure 5~Figure 7 A method for repairing and reinforcing an insufficiently adhered insulation layer includes the following steps: S1. Mark the reinforcement position, such as Figure 5 As shown, the outer side of the exterior wall 1 is pasted with the original insulation board 3 by the point-adhesion method, and there is a gap 4 between the original insulation board 3 and the exterior wall 1. The reinforcement position is marked every 1m to 1.5m in the height and horizontal direction on the outer surface of the original insulation board 3, avoiding the junction between the floor slab 2 and the exterior wall 1, and the decorative layer and the outer mortar layer at the corresponding reinforcement position are removed to expose the original insulation board 3; S2, cutting and grooving, such as Figure 6 As shown, a circular groove 13 with a diameter of 100 mm to 150 mm is opened on the original insulation board 3 with an electric drill taking the calibration position as the center. The depth of the circular groove 13 is the thickness of the original insulation board 3. After the circular groove 13 is opened, the surface of the outer wall 1 is exposed, and the exposed surface of the outer wall 1 is polished and rinsed; S3, repair and reinforcement, such as Figure 7 As shown, the exposed surface of the outer wall 1 and the circumference of the side of the circular groove 13 are fully coated with bonding mortar to form a bonding mortar layer 10. The bonding mortar flows into the gap 4 between the original insulation board 3 and the outer wall 1 to form an enlarged bonding mortar head. After the bonding mortar layer 10 is cured, an insulation nail 14 is placed in the circular groove 13. The insulation nail 14 is composed of a plastic pressure cap 15 that matches the shape of the circular groove 13, a nail rod 16 that penetrates the center of the plastic pressure cap 15 and the bonding mortar layer 10 and enters the outer wall 1 to a certain depth, and a plastic expansion tube 12 at its end. The plastic pressure cap 15 is partially folded over when the bonding mortar layer 10 is exposed and fits the outer surface of the original insulation board 3. S4, backfill the insulation layer, backfill the new insulation material into the circular groove 13, and fully apply the first plaster mortar layer 111 on the new insulation material and the surface of the original insulation board 3. The first plaster mortar layer 111 covers the plastic pressure cap 15 folded in step S3 and attached to the outer surface of the original insulation board 3, and the second mesh cloth 9 is fully spread on the first plaster mortar layer 111. Then, the second plaster mortar layer 112 is fully applied to cover the second mesh cloth 9 and level it. After the plaster mortar layer is cured, the repair and reinforcement work can be completed.

[0026] Reinforcement principle: The bonding mortar layer and the enlarged head of the bonding mortar layer formed by flowing into the gap 4 increase the bonding area between the exterior wall 1 and the original insulation board 3. The insulation nails 14 are used to further fix the position of the original insulation board 3 on the one hand, and prevent the insulation layer from hollowing and cracking under negative wind load on the other hand.

[0027] The above two embodiments can be used in combination, and the points and lines are combined to form a repair and reinforcement structure for insufficient adhesion area of ​​the insulation layer, which can fully cover and enhance the repair and reinforcement effect.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A method for repairing and reinforcing an insufficiently adhered insulation layer, characterized in that: The following steps are involved: S1: Marking the reinforcement position, marking the reinforcement position on the outer surface of the original insulation board 3 in the middle of the outer wall between the adjacent floor slabs (2), removing the decorative layer and the outer mortar layer at the corresponding reinforcement position, and exposing the original insulation board (3); S2: cutting and grooving, using a cutting machine to open a rectangular through groove (5) on the exposed original insulation board (3) at a marked position, the insulation material cut from the rectangular through groove (5) is the separated insulation board (6), the side of the separated insulation board (6) is leveled and placed for standby use, the depth of the rectangular through groove (5) is the thickness of the original insulation board (3), after the rectangular through groove (5) is opened, the surface of the external wall (1) is exposed, and the exposed surface of the external wall (1) is polished and rinsed; S3: Repair and reinforcement, a layer of bonding mortar is fully applied on the exposed surface of the external wall (1) and the top and bottom surfaces of the rectangular through groove (5) to form a first bonding mortar layer (101), a gap (4) is present between the original insulation board (3) and the external wall (1), the bonding mortar flows into the gap (4), and an enlarged bonding mortar head is formed in the gap (4), a first triaxial mesh cloth (7) is fully spread on the first bonding mortar layer (101), and then a second bonding mortar layer (102) is fully applied to cover the first triaxial mesh cloth (7), and after the bonding mortar layer is cured, angle steels (8) are placed at intervals on the inner side of the top of the second bonding mortar layer (102); S4: backfilling the insulation layer, filling the separated insulation board (6) back into the corresponding rectangular through groove (5), applying a first plastering mortar layer (111) on the surface of the separated insulation board (6) and the original insulation board (3), spreading a second triaxial mesh cloth (9) on the surface of the first plastering mortar layer (111), and then applying a second plastering mortar layer (112) to cover the second triaxial mesh cloth (9) and leveling, and completing the repair and reinforcement work after the plastering mortar layer is cured.

2. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 1, characterized in that: The rectangular through groove (5) in step S2 and step S3 has a height of 100 mm to 150 mm and is opened along the width direction of the outer wall (3).

3. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 1, characterized in that: In step S3, the first triaxial mesh cloth (7) forms two turning parts inside the rectangular through groove (5), and the upper and lower ends of the first triaxial mesh cloth (7) both extend beyond the top and bottom of the rectangular through groove (5). The extended parts of the ends of the first triaxial mesh cloth (7) are folded over and temporarily fixed to the outer surface of the original insulation board (3), and are covered by the first plaster mortar layer (111) in step S4.

4. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 1, characterized in that: In step S3, the angle steels are arranged throughout the rectangular through slot (5) at an interval of 3m to 5m.

5. A method for repairing and reinforcing an insufficiently adhered insulation layer, characterized in that: The following steps are involved: S1: Marking the reinforcement position, marking the reinforcement position at a certain interval along the height and horizontal direction on the outer surface of the original insulation board (3), paying attention to avoiding the junction between the floor slab (2) and the outer wall (1), removing the decorative layer and the outer mortar layer at the corresponding reinforcement position, and exposing the original insulation board (3); S2: cutting and grooving, using an electric drill to open a circular groove (13) on the original insulation board (3) at a marked position, the depth of the circular groove (13) being equal to the thickness of the original insulation board (3), after the circular groove (13) is opened, the surface of the outer wall (1) is exposed, and the exposed surface of the outer wall (1) is polished and rinsed; S3: Repair and reinforcement, the exposed surface of the outer wall (1) and the circumference of the side of the circular groove (13) are fully coated with bonding mortar to form a bonding mortar layer (10), the bonding mortar flows into the gap (4) between the original insulation board (3) and the outer wall (1) to form a bonding mortar enlarged head, and after the bonding mortar layer (10) is cured, a thermal insulation nail (14) that matches the circular groove (13) is placed in the circular groove (13); S4: Backfilling the insulation layer, backfilling the new insulation material into the circular groove (13) and leveling the surface, fully coating the first plaster mortar layer (111) on the surface of the new insulation material and the original insulation board (3), fully spreading the second triaxial mesh cloth (9) on the surface of the first plaster mortar layer (111), and then fully coating the second plaster mortar layer (112) to cover the second triaxial mesh cloth (9) and leveling, and the repair and reinforcement work can be completed after the plaster mortar layer is cured.

6. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 5, characterized in that: In step S1, the reinforcement position calibration interval is 1m~1.5m.

7. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 5, characterized in that: The diameter of the circular groove (13) in step S2 and step S3 is 100 mm to 150 mm.

8. The method for repairing and reinforcing the insufficient adhesion area of ​​the thermal insulation layer according to claim 5, characterized in that: The insulation nail (14) in step S3 comprises a plastic pressure cap (15) whose shape matches that of the circular groove (13); the plastic pressure cap (15) is embedded in the bonding mortar layer (10) and fits the bottom surface and the side circumference of the bonding mortar layer (10); the plastic pressure cap (15) is folded over and fits the outer surface of the original insulation board (3) with the portion exposed from the bonding mortar layer (10); the fit portion is covered by the first plastering mortar layer (111) in step S4; the bottom center of the plastic pressure cap (15) is fixed in the bonding mortar layer (10) by a nail rod (16); the end of the nail rod (16) is fixedly connected to a plastic expansion tube (12); the nail rod (16) and the plastic expansion tube (12) penetrate the plastic pressure cap (15) and the bonding mortar layer (10) and enter the outer wall (1) to a certain depth.

9. A repair and reinforcement structure with insufficient insulation layer adhesion area, comprising an original insulation board (3), characterized in that: The original insulation board (3) is provided with a rectangular through groove (5) in the middle of each outer wall (1) of the building, and circular grooves (13) are provided on the outer surface of the original insulation board (3) at a certain interval along the height and horizontal directions. The repair and reinforcement method for insufficient adhesion area of ​​the insulation layer as described in claims 1 to 4 is adopted. After the rectangular through groove is opened, the surface of the outer wall (1) is exposed, and the exposed surface of the outer wall (1) and the top and bottom surfaces of the rectangular through groove (5) are fully coated with a bonding mortar layer (10), and a first triaxial mesh cloth (7) is embedded in the bonding mortar layer (10). An angle steel (8) is usually arranged on the top of the rectangular through groove (5), and the interior of the rectangular through groove (5) is filled with a cut-away insulation board (6) removed from the rectangular through groove (5) when the rectangular through groove (5) is opened. The surfaces of the thermal insulation board (6) and the original thermal insulation board (3) are fully coated with a plaster mortar layer (11), and a second triaxial mesh cloth (9) is embedded inside the plaster mortar layer (11). The repair and reinforcement method for the insufficient bonding area of ​​the thermal insulation layer as described in claims 5 to 8 is adopted, a circular groove (13) is opened to expose the surface of the outer wall (1), and the exposed surface of the outer wall (1) and the side circumference of the circular groove (13) are fully coated with a bonding mortar layer (10), and the outside of the bonding mortar layer (10) is fixed with thermal insulation nails (14), and the circular groove (13) is backfilled with new thermal insulation material, and the new thermal insulation material and the surface of the original thermal insulation board (3) are fully coated with a plaster mortar layer (11), and a second triaxial mesh cloth (9) is embedded inside the plaster mortar layer (11).

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