Repairing structure and method for reserved hole of building outer wall

Abstract

The invention relates to the field of outer wall repairing, in particular to a building outer wall reserved hole repairing structure and method.The building outer wall reserved hole repairing method comprises the following steps that S1, the specification of a reserved hole is set; the specification of the reserved hole comprises a section shape and a section size; s2, reserved holes are formed in the base layer heat preservation plate; the specification of the reserved hole is consistent with the specification of the reserved hole determined in the step S1; s2, implementing the step on the ground; s3, the outer wall of the building is covered with a base layer heat preservation plate, and the wall connecting pieces are all arranged in the reserved holes; s4, the wall connecting piece located in the reserved hole is dismantled; s5, the reserved hole is filled with the prefabricated heat preservation plate; the specification of the prefabricated insulation board is consistent with that of the reserved hole; and when the prefabricated heat preservation plate is filled into the reserved hole, the prefabricated heat preservation plate is attached to the hole wall of the reserved hole. The construction method has the effect that a constructor can conveniently repair the reserved hole of the building outer wall heat preservation layer.

Description

Technical Field

[0001] This application relates to the field of exterior wall repair, and particularly to a repair structure and method for reserved holes in a building exterior wall. Background Art

[0002] During the construction of a building, it is often necessary to set up an external scaffolding on the exterior wall of the building to provide sufficient working surfaces for construction workers. To ensure the safety of the external scaffolding, the external scaffolding generally needs to be fixedly installed on the building exterior wall through connecting wall members, and the connecting wall members are fixedly installed on the building exterior wall through expansion bolts.

[0003] In the existing related technologies, before constructing the finishing layer of the building exterior wall, it is often necessary to lay thermal insulation boards on the building exterior wall to facilitate the thermal insulation system of the building under construction. Since the external scaffolding has been fixedly installed on the building exterior wall through connecting wall members, when constructing near the position of the connecting wall member, construction workers need to cut the thermal insulation board to bypass the external scaffolding through the reserved holes formed by cutting, so as to reduce the obstruction of the external scaffolding to the thermal insulation board.

[0004] Subsequently, in the process of removing the external scaffolding, construction workers cut the thermal insulation board according to the size of the reserved hole to repair the reserved hole and ensure the continuity and effectiveness of the exterior wall thermal insulation system.

[0005] In view of the above related technologies, when repairing the reserved hole, construction workers need to measure and construct the hole groove at a high altitude to ensure that the specifications of the thermal insulation board used for filling match the specifications of the reserved hole. However, there are many objective restrictions in high-altitude operations, making it inconvenient for construction workers to repair the reserved hole. Summary of the Invention

[0006] In order to facilitate construction workers to repair the reserved holes in the building exterior wall thermal insulation layer, this application provides a method for repairing reserved holes in a building exterior wall.

[0007] The method for repairing reserved holes in a building exterior wall provided by this application adopts the following technical solutions: A method for repairing reserved holes in a building exterior wall includes the following steps: S1. Set the specifications of the reserved hole; The specifications of the reserved hole include the cross-sectional shape and cross-sectional size; S2. Open a reserved hole in the base thermal insulation board; The specifications of the reserved hole are the same as those of the reserved hole determined in step S1; Step S2 is implemented on the ground; S3. Lay the base thermal insulation board on the building exterior wall, and make sure that all connecting wall members are located inside the reserved hole; S4. Remove the connecting wall members inside the reserved holes; S5. Fill the inside of the reserved holes with prefabricated thermal insulation boards; The specifications of the prefabricated thermal insulation boards are the same as those of the reserved holes; When the prefabricated thermal insulation boards are filled into the inside of the reserved holes, the prefabricated thermal insulation boards are attached to the hole walls of the reserved holes.

[0008] By adopting the above technical solutions, the specifications of the reserved holes are pre-uniformly designed, reducing the occurrence of the situation where construction workers need to measure the reserved holes at high altitudes. Moreover, the prefabricated thermal insulation boards can also be cut on the ground according to the specifications of the pre-designed reserved holes, thereby reducing the amount of high-altitude work of construction workers and facilitating the repair of the reserved holes in the building exterior wall thermal insulation layer by construction workers.

[0009] Optionally, in step S3, after laying the base thermal insulation board, lay a reinforced mesh cloth on the surface of the base thermal insulation board; The reinforced mesh cloth is provided with a cutting seam arranged therethrough. The cutting seam is located at the position of the reserved hole. The reinforced mesh cloth forms a folding part and a perforating part through the cutting seam. The folding part is used to open and close the perforating part, and the perforating part is used for the connecting wall members to pass through; The method for repairing the reserved holes in the building exterior wall further includes the following steps: S6. Lay a crack-resistant layer, and then close the perforating part through the folding part; The crack-resistant layer is laid on the prefabricated thermal insulation board, and the crack-resistant layer is formed by applying a crack-resistant mortar.

[0010] By adopting the above technical solutions, the crack-resistant mortar fills the construction gap between the reserved hole and the prefabricated thermal insulation board, which is beneficial to reducing the occurrence of water leakage at the position of the subsequent reserved hole. Moreover, through the reinforced mesh cloth, the cracking degree of the crack-resistant layer can be slowed down, thereby improving the service life of the crack-resistant layer. Furthermore, through the clear specifications of the reserved holes, the setting position of the cutting seam can be more accurately judged, and then the cutting of the reinforced mesh cloth can be transferred to the ground for operation, further reducing the amount of high-altitude work and facilitating the repair of the reserved holes in the building exterior wall thermal insulation layer by construction workers.

[0011] Optionally, the method for repairing the reserved holes in the building exterior wall further includes the following steps: S7. Lay a prefabricated decorative panel on the surface of the crack-resistant layer; The pattern of the prefabricated decorative panel is the same as that of the decorative layer of the building exterior wall, and the specifications of the prefabricated decorative panel are the same as those of the reserved holes.

[0012] By adopting the above technical solution, the pattern of the prefabricated decorative panel is conducive to ensuring the continuity of the pattern of the building exterior wall. In addition, by making the specifications of the reserved holes, the prefabricated insulation board, and the prefabricated decorative panel consistent, the gaps generated during the repair process will be closer to the gaps of the building decorative layer itself, which is further conducive to ensuring the continuity of the pattern of the building exterior wall.

[0013] Optionally, the wall connecting member is installed on the building exterior wall by bolts; In the step S4: after removing the wall connecting member inside the reserved hole, fill the exterior wall bolt hole formed after removing the wall connecting member with expansion slurry and lay a waterproof coating layer; The volume of the expansion slurry will increase after curing.

[0014] By adopting the above technical solution, the exterior wall bolt hole formed after removing the wall connecting member is blocked by the expansion slurry and the waterproof coating, which is conducive to reducing the occurrence of building exterior wall leakage.

[0015] Optionally, the cross-sectional shape of the reserved hole is set in an "I" shape or a "Z" shape.

[0016] By adopting the above technical solution, it is convenient for the prefabricated insulation board and the base insulation board to be mutually clamped, thereby ensuring the bonding degree between the prefabricated insulation board and the base insulation board, and reducing the occurrence of loosening or falling off of the prefabricated insulation board.

[0017] Optionally, the prefabricated decorative panel is connected with a filling bag layer, the material of the filling bag layer is plastic, the filling bag layer is filled with filling slurry, and the filling slurry will solidify after overflowing from the filling bag layer.

[0018] By adopting the above technical solution, when laying and installing the prefabricated decorative panel, the construction worker punctures the filling bag layer, so that the filling slurry in the filling bag layer overflows, thereby filling the gap between the prefabricated decorative panel and the reserved hole, which is conducive to ensuring the installation stability and sealing performance of the prefabricated decorative panel.

[0019] Optionally, the prefabricated decorative panel is installed on the prefabricated insulation board through insulation nails passing through the filling bag layer.

[0020] By adopting the above technical solution, when laying and installing the prefabricated decorative panel, the insulation nails puncture the filling bag layer, so that the filling slurry in the filling bag layer overflows, reducing the situation that the construction worker punctures the filling bag layer separately.

[0021] Optionally, the prefabricated decorative panel is provided with decorative panel convex ribs, and the decorative panel convex ribs surround the filling bag layer.

[0022] By adopting the above technical solution, the convex ribs of the decorative panel hinder the overflowing filling slurry, which is beneficial to reducing the situation that the filling slurry flows to the other side of the prefabricated decorative panel, and further beneficial to ensuring the integrity of the building facade and reducing the dirt formed on the building facade after the filling slurry solidifies.

[0023] Optionally, in the step S7, after laying the prefabricated decorative panel, press the prefabricated decorative panel.

[0024] By adopting the above technical solution, it is beneficial to further expand the holes in the damaged filling bag layer, enabling the filling slurry to overflow more fully, and further ensuring that the filling slurry can fully fill the gaps.

[0025] In addition, the present application also discloses a repair structure for reserved holes in a building exterior wall, which is implemented by the above technical solution.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The specifications of the reserved holes are pre-uniformly designed, reducing the situation where construction workers need to measure the reserved holes at high altitudes. Moreover, the prefabricated insulation board can also be cut on the ground according to the specifications of the pre-designed reserved holes, thereby reducing the amount of high-altitude work of construction workers and facilitating the repair of the reserved holes in the building exterior wall insulation layer by construction workers; 2. The construction gap between the reserved hole and the prefabricated insulation board is filled with anti-cracking mortar, which is beneficial to reducing the occurrence of water leakage at the position of the subsequent reserved hole. Moreover, through the reinforcing mesh cloth, the cracking degree of the anti-cracking layer can be slowed down, thereby improving the service life of the anti-cracking layer. Furthermore, through the clear specifications of the reserved holes, the setting position of the cutting seam can be more accurately judged, so that the cutting of the reinforcing mesh cloth can be transferred to the ground, further reducing the amount of high-altitude work and facilitating the repair of the reserved holes in the building exterior wall insulation layer by construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic cross-sectional view of the connecting member and the building exterior wall in Embodiment 1 of the present application.

[0028] Figure 2 It is a schematic overall construction view of the method for repairing reserved holes in a building exterior wall in Embodiment 1 of the present application.

[0029] Figure 3 It is an exploded view of the prefabricated decorative panel and the prefabricated insulation board in Embodiment 1 of the present application.

[0030] Figure 4 It is a schematic structural view of the method for repairing reserved holes in a building exterior wall in Embodiment 2 of the present application.

[0031] Figure 5It is a schematic diagram of the cooperation between the prefabricated decorative panel and the prefabricated thermal insulation panel in Embodiment 2 of the present application.

[0032] Figure 6 It is a schematic cross-sectional view of the repair structure for the reserved holes in the building exterior wall in Embodiment 3 of the present application.

[0033] Figure 7 It is an overall schematic diagram of the prefabricated decorative panel in Embodiment 4 of the present application.

[0034] Figure 8 It is a schematic construction cross-sectional view of the method for repairing the reserved holes in the building exterior wall in Embodiment 4 of the present application Explanation of reference numerals: 1, building exterior wall; 101, exterior wall bolt hole; 2, base thermal insulation panel; 201, reserved hole; 21, reinforced mesh cloth; 22, waterproof coating layer; 3, prefabricated thermal insulation panel; 31, mortar leveling layer; 32, anti-cracking layer; 4, prefabricated decorative panel; 41, filling bag layer; 42, decorative panel rib. Detailed implementation manners

[0035] The following further elaborates on the present application in conjunction with the attached Figure 1-8 for a more detailed description of the present application.

[0036] Embodiment 1: Embodiment 1 of the present application discloses a method for repairing reserved holes in a building exterior wall.

[0037] Referring to Figure 1 , the method for repairing the reserved holes 201 in the building exterior wall 1 is used for the reserved holes 201 formed in the base thermal insulation panel after the removal of the connecting wall members and the external scaffolding, and for repairing the exterior wall bolt holes 101 formed in the building exterior wall 1. Moreover, the structure of the building exterior wall 1 is reinforced concrete, and the connecting wall members are fixedly installed on the building exterior wall 1 through expansion bolts.

[0038] The method for repairing the reserved holes in the building exterior wall includes the following steps: S1. Set the specifications of the reserved holes 201.

[0039] The specifications of the reserved holes 201 include the cross-sectional shape and cross-sectional dimensions. For example, the cross-sectional shape of the reserved holes 201 can be set as a rectangle, and the length and width of the reserved holes 201 can be set as 220 mm and 200 mm respectively, or the cross-sectional shape of the reserved holes 201 can be set as a circle, and the diameter of the reserved holes 201 can be set as 200 mm.

[0040] Referring to Figure 2 , specifically, in Embodiment 1 of the present application, the cross-sectional shape of the reserved holes 201 is in the shape of "I".

[0041] S2. Open the reserved holes 201 in the base thermal insulation panel 2.

[0042] The material of the base insulation board 2 can be: EPS board (molded polystyrene board), XPS board (extruded polystyrene board), PU board (polyurethane insulation board), rock wool board, glass wool board and / or phenolic foam board, etc. Specifically, in this application, the material of the base insulation board 2 is XPS extruded board.

[0043] The construction workers cut the base insulation board on the ground according to the specifications determined in step S1 to make the specifications of the reserved hole 201 consistent with those determined in step S1, thereby reducing the situation of cutting the insulation board at high altitude and reducing the influence of high-altitude shaking on cutting, which is beneficial to improving the convenience and accuracy of cutting.

[0044] In addition, in this application, the ground refers to a permanent or semi-permanent working surface, such as a floor slab, a floor or a placement table, etc., and is different from temporary working surfaces such as hanging baskets, hanging ropes, crossbeams, and scaffolding.

[0045] S3. Lay the base insulation board 2 on the exterior wall 1 of the building, and make the connecting wall members all located inside the reserved hole 201, and then lay the reinforced mesh cloth 21 on the surface of the base insulation board 2 through the anti-cracking mortar.

[0046] The reserved hole 201 can be formed by any number of base insulation boards 2. For example, it can be directly formed by a single base insulation board 2, or a complete reserved hole 201 can be formed by splicing multiple base insulation boards 2 to facilitate adaptation to different working conditions. In addition, when there is a connecting wall member inside the reserved hole 201, the distance between the surface of the connecting wall member and the hole wall of the reserved hole 201 is more than 30 mm to facilitate the construction of the construction workers inside the reserved hole 201.

[0047] The reinforced mesh cloth 21 needs to be laid on the whole of the exterior wall 1 of the building, and the reinforced mesh cloth 21 is provided with a cutting seam (not shown in the figure) penetrating through it, and the cutting seam is located at the position of the reserved hole 201. The cutting seam is cut by the construction workers on the ground according to the specifications of the reserved hole determined in step S1. The reinforced mesh cloth 21 forms a folding part (not shown in the figure) and a perforated part (not shown in the figure) through the cutting seam. The folding part is used to open and close the perforated part, and the perforated part is used for the connecting wall member to pass through.

[0048] When the connecting wall member in the reserved hole 201 has not been removed, the perforated part is opened by lifting the folding part, so that the connecting wall member passes through the perforated part. In addition, in Embodiment 1 of this application, the type of the anti-cracking mortar is mortar.

[0049] S4. Remove the connecting wall member located inside the reserved hole 201, then fill the exterior wall bolt hole 101 formed after removing the connecting wall member with expansion slurry, and then lay a waterproof coating layer 22 on the surface of the solidified and dense expansion glue.

[0050] The volume of the expansive mortar increases after curing. In Example 1 of this application, the type of the expansive mortar is slightly expansive waterproof concrete, and the type of the waterproof coating is polyurethane waterproof material.

[0051] S5. Lay a mortar leveling layer 31 on the surface of the waterproof coating layer 22 in the reserved hole 201, and then fill the precast insulation board 3 into the reserved hole 201.

[0052] The precast insulation board 3 is adhesively fitted to the mortar leveling layer 31. The specifications of the precast insulation board 3 are consistent with those of the reserved hole 201. When the precast insulation board 3 is filled into the reserved hole 201, the precast insulation board 3 fits against the hole wall of the reserved hole 201.

[0053] S6. Set a crack-resistant layer 32.

[0054] The crack-resistant layer 32 is laid on the precast insulation board 3 and is formed by applying a crack-resistant mortar.

[0055] Step S6 includes the following steps: S61. Apply the crack-resistant mortar on the surface of the precast insulation board 3 for the first time; S62. Press the folded part of the reinforcing mesh cloth 21 into the internally applied crack-resistant mortar for the first time, and seal the perforated part of the reinforcing mesh cloth 21; Pressing the folded part into the crack-resistant mortar is beneficial to connecting the repaired part to other areas of the building exterior wall 1, so that the crack-resistant layer 32 inside the reserved hole 201 is not easily detached. Moreover, it is also beneficial to reduce the situation where construction workers lay the reinforcing mesh cloth 21 in the reserved hole 201, and is beneficial to ensuring the integrity between the reinforcing mesh cloth 21 at the reserved hole 201 and the reinforcing mesh cloth 21 in other areas.

[0056] S63. Apply the crack-resistant mortar on the surface of the crack-resistant mortar applied in Step S61 for the second time; S64. Pass the insulation nails through the crack-resistant mortar and the reinforcing mesh cloth 21, and drive the insulation nails into the precast insulation board 3.

[0057] S7. Lay a precast decorative panel 4 on the surface of the crack-resistant layer 32.

[0058] Refer to Figure 3 , the precast decorative panel 4 is installed on the precast insulation board 3 through insulation nails. The material of the insulation nails can be metal or plastic, and the type of the insulation nails can be selected from the types in the existing relevant technologies. The pattern of the precast decorative panel 4 is consistent with that of the decorative layer of the building exterior wall 1, and the specifications of the precast decorative panel 4 are consistent with those of the reserved hole 201, so that the precast decorative panel 4 is continuous with the decorative layer of the building exterior wall 1 after installation.

[0059] The implementation principle of the repair method for the reserved holes in the exterior wall of a building in Embodiment 1 of the present application is as follows: The specifications of the reserved holes 201 and the positions of the cutting seams of the reinforced mesh cloth 21 are pre-uniformly designed on the ground, reducing the need for construction workers to measure the reserved holes 201 at high altitudes. Moreover, the prefabricated thermal insulation board 3 can also be cut on the ground according to the pre-designed specifications of the reserved holes 201, thereby reducing the amount of high-altitude work of the construction workers and facilitating the construction workers to repair the reserved holes 201 in the thermal insulation layer of the exterior wall 1 of the building.

[0060] Embodiment 2: Embodiment 2 of the present application discloses a repair method for the reserved holes in the exterior wall of a building. The difference from Embodiment 1 is as follows: Referring to Figure 4 and Figure 5 , the cross-sectional shape of the reserved hole 201 is a continuously bent "Z" shape, and the patterns of the decorative layers of the exterior wall 1 of the building and the prefabricated panel are brick walls.

[0061] Embodiment 3: Embodiment 3 of the present application discloses a repair structure for the reserved holes 201 in the exterior wall 1 of a building, which is implemented by the technical solutions of Embodiment 1 or Embodiment 2 and includes the following technical features: Referring to Figure 6 , the base thermal insulation board 2 is laid on the exterior wall 1 of the building, and the reserved hole 201 is formed by enclosing the exterior wall through the base thermal insulation board 2. The exterior wall bolt hole 101 formed after removing the connecting wall member is formed on the bottom wall of the reserved hole 201, and the exterior wall bolt hole 101 extends horizontally from the bottom wall of the reserved hole 201 to the opening of the reserved hole 201. The waterproof coating layer 22, the mortar leveling layer 31, the prefabricated thermal insulation board 3, the first applied crack-resistant mortar, the reinforced mesh cloth 21, the second applied crack-resistant mortar, and the prefabricated decorative panel 4 are arranged in sequence, and the insulation nails are sequentially passed through the prefabricated thermal insulation board, the second applied crack-resistant mortar, the reinforced mesh cloth 21, the first applied crack-resistant mortar, and the prefabricated thermal insulation board 3.

[0062] Embodiment 4: Embodiment 4 of the present application discloses a repair method for the reserved holes 201 in the exterior wall 1 of a building. The difference from Embodiment 1 is as follows: Referring to Figure 7 , it further includes the following technical features: On the inner side of the prefabricated facing panel 4, that is, on the side facing the prefabricated thermal insulation panel 3, a filling bag layer 41 is fixedly connected. The material of the filling bag layer 41 is plastic, which is convenient for the transportation of the prefabricated facing panel 4 and is also convenient for damaging the filling tape layer during the process of laying the prefabricated facing panel 4. The inside of the filling bag layer 41 is filled with a filling slurry, and the filling slurry will solidify after overflowing from the filling bag layer 41. Exemplarily, in Embodiment 4 of the present application, the type of the filling slurry is epoxy resin. In addition, the prefabricated facing panel 4 is also integrally connected with a facing rib 42, and the facing rib 42 surrounds the filling bag layer 41, so that the filling slurry is not likely to overflow a large amount outside the facing rib 42.

[0063] In step S7, when laying the prefabricated facing panel 4 on the surface of the crack-resistant layer 32, the thermal insulation nails are passed through the prefabricated facing panel 4 to pierce the filling bag layer 41, and then the prefabricated facing panel 4 is pressed, so that the filling slurry overflows from the inside of the filling bag layer 41 and fully fills into each gap.

[0064] The implementation principle of a method for repairing the reserved hole 201 of a building exterior wall 1 in Embodiment 4 of the present application is as follows: Refer to Figure 8 , by arranging a destructible filling bag layer 41 on the side of the prefabricated facing panel 4 facing the prefabricated thermal insulation panel 3, the filling slurry inside the damaged filling bag layer 41 can quickly fill the gaps, reducing the occurrence of the situation where construction workers manually apply slurry for construction, and facilitating the construction workers to carry out stable and sealing construction.

[0065] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for repairing reserved holes in the exterior wall of a building, characterized in that: It includes the following steps: S1. Set the specifications of the reserved hole (201); The specifications of the reserved hole (201) include the cross-sectional shape and cross-sectional size; S2. Open a reserved hole (201) in the base insulation board (2); The specifications of the reserved hole (201) are consistent with those of the reserved hole (201) determined in step S1; Step S2 is implemented on the ground; S3. Lay the base insulation board (2) on the building exterior wall (1), and make the connecting wall members all located inside the reserved hole (201); S4. Remove the connecting wall members located inside the reserved hole (201); S5. Fill the inside of the reserved hole (201) with the precast insulation board (3); The specifications of the precast insulation board (3) are consistent with those of the reserved hole (201); When the precast insulation board (3) is filled into the inside of the reserved hole (201), the precast insulation board (3) fits against the hole wall of the reserved hole (201).

2. A method for repairing reserved holes in a building exterior wall according to claim 1, characterized in that: In step S3, after laying the base insulation board (2), lay a reinforced mesh cloth (21) on the surface of the base insulation board (2); The reinforced mesh cloth (21) is provided with a cut seam penetrating through it. The cut seam is located at the position of the reserved hole (201). The reinforced mesh cloth (21) forms a folded part and a perforated part through the cut seam. The folded part is used to open and close the perforated part, and the perforated part is used for the connecting wall members to pass through; The method for repairing the reserved hole (201) of the building exterior wall (1) further includes the following steps: S6. Lay a crack-resistant layer (32), and then close the perforated part through the folded part; The crack-resistant layer (32) is laid on the precast insulation board (3), and the crack-resistant layer (32) is formed by applying a crack-resistant mortar.

3. A method for repairing reserved holes in the exterior wall of a building according to claim 2, characterized in that: The method for repairing the reserved hole of the building exterior wall further includes the following steps: S7. Lay a precast decorative panel (4) on the surface of the crack-resistant layer (32); The pattern of the precast decorative panel (4) is consistent with that of the decorative layer of the building exterior wall (1), and the specifications of the precast decorative panel (4) are consistent with those of the reserved hole (201).

4. A method for repairing reserved holes in the exterior wall of a building according to claim 1, characterized in that: The connecting wall members are installed on the building exterior wall by bolts; In step S4: After removing the connecting wall members located inside the reserved hole (201), fill the exterior wall bolt hole (101) formed after removing the connecting wall members with an expansion slurry and lay a waterproof coating layer (22); The volume of the expansion slurry will increase after curing.

5. A method for repairing reserved holes in the exterior wall of a building according to claim 1, characterized in that: The cross-sectional shape of the reserved hole (201) is set in an "I" shape or a "Z" shape.

6. A method for repairing reserved holes in the exterior wall of a building according to claim 3, characterized in that: The precast decorative panel (4) is connected with a filling bag layer (41). The material of the filling bag layer (41) is plastic. The inside of the filling bag layer (41) is filled with a filling slurry, and the filling slurry will solidify after overflowing from the filling bag layer (41).

7. A method for repairing reserved holes in a building exterior wall according to claim 6, characterized in that: The precast decorative panel (4) is installed on the precast insulation board (3) by thermal insulation nails passing through the filling bag layer (41).

8. A method for repairing reserved holes in a building exterior wall according to claim 7, characterized in that: The precast decorative panel (4) is provided with decorative panel rib protrusions (42), and the decorative panel rib protrusions (42) surround the filling bag layer (41).

9. A method for repairing reserved holes in the exterior wall of a building according to claim 6, characterized in that: In the step S7, after laying the prefabricated decorative panel (4), press the prefabricated decorative panel (4).

10. A repair structure for reserved holes in the exterior wall of a building, characterized in that: It is implemented by the method for repairing the reserved hole (201) of the building exterior wall (1) according to any one of claims 1-5.

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