Multilayer masonry wall reinforcing joint and reinforcing method

Abstract

A multi-layer masonry wall reinforcing node and a reinforcing method belong to the technical field of wall reinforcing, the multi-layer masonry wall reinforcing node comprises to-be-reinforced walls, the to-be-reinforced walls are located on the upper side and the lower side of a floor slab, the surfaces of the to-be-reinforced walls are fixedly connected with fiber woven meshes through bonding of bonding matrixes, and the fiber woven meshes located on the upper side and the lower side of the floor slab are fixedly connected through fiber boards. The fiberboards vertically penetrate through the floor, and the vertical continuity between the fiber woven meshes on the surfaces of the same sides of the walls of different layers can be guaranteed through the fiberboards, so that the stress continuity of the walls and the out-of-plane rigidity of the interlayer are guaranteed, and the reinforcing effect of the walls is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wall reinforcement, in particular to a multi-layer masonry wall reinforcement node and a reinforcement method. Background Art

[0002] Masonry wall refers to a wall built of bricks or blocks. It is one of the main components of a building and plays a role in enclosure and load-bearing. As the building ages, the wall material may gradually lose its original strength and stability due to weathering, corrosion and other reasons. Masonry walls need to be reinforced. Masonry wall reinforcement is an important measure to improve the stability and safety of buildings.

[0003] At present, the reinforcement methods of masonry walls mainly include reinforced concrete surface layer reinforcement, steel mesh cement mortar surface layer reinforcement, steel wire mesh-polymer mortar surface layer reinforcement and fiber cloth adhesive reinforcement. Among them, reinforced concrete surface layer reinforcement, steel mesh cement mortar surface layer reinforcement and steel wire mesh-polymer mortar surface layer reinforcement all require steel bar processing and binding operations, the construction process is relatively complicated, the dead weight is large, and it is easy to have quality defects such as steel bar corrosion and hollow reinforcement layer.

[0004] The fiber cloth reinforcement method uses organic epoxy resin glue as an adhesive to stick carbon fiber composite materials to the wall surface. It has a high cost and poor synergy with masonry materials. It is mainly used for shear reinforcement of walls and has a poor reinforcement effect. At the same time, for the wall reinforcement of multi-story masonry houses, the vertical continuity of the fiber cloth cannot be guaranteed due to the obstruction of the floor slab, the integrity is poor, the out-of-plane stiffness of the wall between layers is low, and the seismic reinforcement effect of multi-story masonry houses is poor. Summary of the invention

[0005] In order to solve the technical problems in the above-mentioned background technology of wall reinforcement of multi-story masonry houses, the existing fiber cloth bonding reinforcement method has poor integrity and the seismic reinforcement effect of multi-story masonry houses is poor, the present invention provides a multi-story masonry wall reinforcement node.

[0006] The technical solution of the present invention is as follows: The present invention provides a multi-layer masonry wall reinforcement node, comprising: a wall to be reinforced, the wall to be reinforced is located on the upper and lower sides of a floor slab, a fiber woven mesh is bonded and fixedly connected to the surface of the wall to be reinforced through an adhesive matrix, the fiber woven meshes located on the upper and lower sides of the floor slab are fixedly connected by a fiberboard, the fiberboard vertically penetrates the floor slab, and the arrangement of the fiberboard can ensure the vertical continuity between the fiber woven meshes on the same side surface of different layers of walls, so as to ensure the uniformity of the force on the wall and improve the wall reinforcement effect.

[0007] Preferably, an anchoring groove is opened on the wall to be reinforced, the fiberboard vertically passes through the floor slab and the end is fixed in the anchoring groove, so that the end of the fiberboard is embedded in the wall to be reinforced, achieving integrity of the connection with the wall to be reinforced and ensuring the reinforcement effect.

[0008] Preferably, the depth of the anchoring groove transitions from shallow to deep in the direction away from the floor slab, so as to reduce the bending angle of the fiberboard and avoid stress concentration when the fiberboard is loaded.

[0009] Preferably, multiple layers of fiber woven mesh are arranged on the surface of the wall to be reinforced, and adjacent layers of fiber woven mesh are fixedly connected by an adhesive matrix, thereby increasing the overall thickness of the reinforcement layer to meet the compression and seismic reinforcement requirements of multi-layer masonry structure houses.

[0010] Preferably, a reinforcing fiber mesh is fixed on the outer sides of the fiber woven mesh. The reinforcing fiber mesh is fixed by gluing it with an adhesive matrix, which can effectively avoid the problem of premature debonding of the fiber woven mesh, improve the integrity of the reinforcement layer and the original wall, and further improve the bearing capacity of the reinforced wall.

[0011] Preferably, the reinforcing fiber mesh is fixedly connected to the wall to be reinforced by anchor bolts, and the anchor bolts and the reinforcing fiber mesh are in contact with each other through gaskets to increase the contact area between the anchor bolts and the reinforcing fiber mesh and improve the anchoring effect.

[0012] Preferably, the middle area of ​​the fiber woven mesh is fixedly connected to the wall to be reinforced by anchor bolts to improve the installation firmness of the fiber woven mesh and the integrity with the wall to be reinforced, thereby ensuring the reinforcement effect.

[0013] Preferably, when the wall to be reinforced is an exterior wall, the reinforcement layer on the outer surface of the wall to be reinforced can be used to bond the insulation layer to the substrate, and a protective layer and an exterior decorative layer can be provided on the outside of the insulation layer. The insulation layer and the exterior decorative layer are a layered structure or an insulation and decorative integrated panel structure, which combines the reinforcement of the structural bearing capacity with the improvement of the insulation performance of the building exterior wall, thereby improving the comprehensive performance of old masonry structure houses.

[0014] The present invention provides a reinforcement method, which is as follows: The surface of the wall to be reinforced is processed to expose the brick surface, and anchor grooves are opened on the wall to be reinforced on the upper and lower sides of the floor slab, and sheet-shaped openings are opened on the floor slab; Apply primer in the anchor groove and the floor opening, pass the fiberboard through the floor opening and fix it, and at the same time, stick and fix the two ends of the fiberboard in the anchor grooves of the walls to be reinforced on the upper and lower sides of the floor; Evenly apply the bonding matrix on the surface of the masonry wall to be reinforced, impregnate the fiber woven mesh with the bonding matrix, and then lay and fix it in the bonding matrix on the surface of the wall to be reinforced; When multiple layers of fiber woven mesh are set up, they are pasted and laid layer by layer. After the outermost layer of fiber woven mesh is pasted, reinforcing fiber mesh is pasted on the outside of the outermost layer of fiber woven mesh, and anchor bolts are implanted.

[0015] Preferably, when the wall to be reinforced is an exterior wall, the outermost bonding matrix is ​​used to bond the thermal insulation layer, and a protective layer and an exterior decorative layer are made outside the thermal insulation layer, or the bonding matrix is ​​used to bond the thermal insulation decorative integrated panel.

[0016] It can be seen from the above technical solutions that the advantages of the present invention are: 1. Using fiber woven mesh instead of steel mesh eliminates the need for steel bar processing at the construction site, improves construction efficiency, and solves the problem of steel bar corrosion during subsequent use. The fiber woven meshes on the upper and lower sides of the floor slab are fixedly connected by fiberboard, which can ensure the vertical continuity between the fiber woven meshes on the same side surface of different layers of walls, so as to ensure the continuity of wall force and the out-of-plane stiffness between layers, and improve the wall reinforcement effect.

[0017] 2. An anchor groove is opened on the wall to be reinforced. The fiberboard passes through the floor vertically and the end is fixed in the anchor groove, which realizes the integrity of the connection with the wall to be reinforced and ensures the reinforcement effect. The depth of the anchor groove transitions from shallow to deep in the direction away from the floor to reduce the bending angle of the fiberboard and avoid premature damage of the fiberboard due to stress concentration when loaded.

[0018] 3. Multiple layers of fiber woven mesh are arranged on the surface of the wall to be reinforced, and adjacent layers of fiber woven mesh are fixedly connected by an adhesive matrix, thereby increasing the overall thickness of the reinforcement layer and meeting the requirements of wall compression and seismic reinforcement at the same time.

[0019] 4. A reinforcing fiber mesh is fixed around the outside of the fiber woven mesh. The reinforcing fiber mesh is fixed by bonding the matrix and anchor bolts, which can effectively avoid the problem of premature debonding of the fiber woven mesh, improve the integrity of the reinforcement layer and the original wall, and thus improve the bearing capacity of the reinforced wall.

[0020] 5. Use the bonding matrix of the reinforcement layer to bond the insulation layer or the insulation decoration integrated board, while improving the bearing capacity and insulation performance of the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of a multi-layer masonry wall reinforcement node according to one or more embodiments of the present invention; Figure 2 for Figure 1 AA cross-section diagram of the structure shown Figure 1 (Interior wall reinforcement); Figure 3 for Figure 1 AA cross-section diagram of the structure shown Figure 2 (External wall reinforcement); Figure 4 for Figure 1 BB cross-sectional structural schematic diagram of the structure shown.

[0023] The components represented by the reference numerals in the figure are: 1. Wall to be reinforced; 2. Floor slab; 3. Fiber woven mesh; 4. Reinforced fiber mesh; 5. Fiberboard; 6. Anchor groove; 7. Anchor bolt; 8. Gasket; 9. Bonding matrix; 10. Insulation layer; 11. Protective layer and exterior decorative layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0025] Example 1 In a typical embodiment of the present invention, a multi-layer masonry wall reinforcement node is proposed, comprising: a wall 1 to be reinforced, a floor slab 2, a fiber woven mesh 3 and a fiberboard 5, such as Figure 1 , Figure 2 As shown, the wall 1 to be reinforced is located on the upper and lower sides of the floor slab 2. A fiber woven mesh 3 is bonded and fixedly connected to the surface of the wall 1 to be reinforced on the upper side of the floor slab 2 through an adhesive matrix 9. A fiber woven mesh 3 is also bonded and fixedly connected to the surface of the wall 1 to be reinforced on the lower side of the floor slab 2 through an adhesive matrix 9. The fiber woven meshes 3 on the upper and lower sides of the floor slab 2 are fixedly connected by fiber boards 5. Several fiber boards 5 are arranged at intervals. The fiber boards 5 vertically penetrate the floor slab 2 to ensure the vertical continuity between the fiber woven meshes 3 on the same side surface of different layers of walls, so as to ensure the continuity of the wall force and the out-of-plane stiffness between layers, thereby improving the wall reinforcement effect.

[0026] It is understandable that the fiber woven mesh 3 can be set on a single side surface of the wall 1 to be reinforced, or on both side surfaces of the wall 1 to be reinforced. The specific setting method can be determined according to the actual reinforcement performance design requirements, and no excessive restrictions are made here.

[0027] Specific as Figure 2 As shown, an anchoring groove 6 is opened on the wall 1 to be reinforced, and the fiberboard 5 vertically passes through the floor 2 and the end is placed in the anchoring groove 6, so that the end of the fiberboard 5 is embedded in the interior of the wall 1 to be reinforced, the groove width of the anchoring groove 6 is greater than the width of the fiberboard 5, and is not less than three times the thickness of the fiberboard 5, the groove depth is not less than 1.5 times the width of the fiberboard 5, and the depth of the anchoring groove 6 transitions from shallow to deep in the direction away from the floor 2 to reduce the bending angle of the fiberboard 5 and avoid stress concentration on the fiberboard 5, and the slope of the transition section is not greater than 1:10.

[0028] In this embodiment, the fiberboard 5 is a carbon fiber, glass fiber, aramid fiber or basalt fiber strip board, the thickness of the fiber strip board is 1~12mm, and the width is 12~30mm; the fiber woven mesh 3 is made of carbon fiber, glass fiber, aramid fiber, basalt fiber or a mixture of the above fibers, and the mesh size is 20~80mm; the bonding matrix 9 adopts cement mortar, polymer mortar or fine-grained concrete, among which the mortar compressive strength is 15~45MPa, and the concrete compressive strength is 20~45MPa.

[0029] In order to simultaneously improve the shear and compressive bearing capacity of the wall 1 to be reinforced, multiple layers of fiber woven mesh 3 are arranged on the surface of the wall 1 to be reinforced, and adjacent layers of fiber woven mesh 3 are fixedly connected by a bonding matrix 9, thereby increasing the overall thickness of the reinforcement layer (i.e., the fiber woven mesh 3 and the bonding matrix 9) to meet the compression and seismic reinforcement needs of multi-layer masonry structure houses.

[0030] A reinforcing fiber mesh 4 is fixedly arranged on the outer sides of the fiber woven mesh 3. The reinforcing fiber mesh 4 is made of carbon fiber, glass fiber, aramid fiber, basalt fiber or a mixture of the above fibers. The mesh size is 5-20 mm, and the width of the reinforcing fiber mesh 4 is 40-120 mm.

[0031] It should be noted that when a single layer of the fiber woven mesh 3 is provided, a reinforcing fiber mesh 4 is fixedly provided on the outer sides of the single layer of the fiber woven mesh 3; when multiple layers of the fiber woven mesh 3 are provided, a reinforcing fiber mesh 4 is fixedly provided on the outer sides of the outermost layer of the fiber woven mesh 3, and the reinforcing fiber mesh 4 is fixed by gluing with an adhesive matrix 9.

[0032] The reinforcing fiber mesh 4 is also fixedly connected to the wall 1 to be reinforced by anchor bolts 7. The anchor bolts 7 pass through the reinforcing fiber mesh 4 and the fiber woven mesh 3 in turn and are connected to the wall 1 to be reinforced. The anchor bolts 7 are steel bolts or fiber bolts with a bolt diameter of 4 to 10 mm. They are anchored into the masonry wall by structural adhesive. The anchor bolts 7 and the reinforcing fiber mesh 4 are in contact through gaskets 8. The gaskets 8 are steel gaskets or fiber gaskets, which are round or square in shape. The diameter or side length of the gaskets 8 is 20 to 50 mm.

[0033] A reinforcing fiber mesh 4 is arranged on the outside of the fiber woven mesh 3 and fixed to the wall 1 to be reinforced by bonding and anchoring, which can effectively avoid the problem of premature debonding of the fiber woven mesh 3, improve the integrity of the reinforcement layer and the original wall, and further improve the bearing capacity and ductility of the reinforced wall.

[0034] In this embodiment, anchor bolts 7 are arranged around the fiber braided mesh 3. Figure 1 , Figure 4 As shown, the middle area of ​​the fiber woven mesh 3 adopts plum blossom-shaped interval arrangement of anchor bolts, and the bolt spacing is 300~1000mm; in other embodiments, when a bonding matrix 9 with good bonding properties such as polymer mortar is used, the middle area of ​​the fiber woven mesh 3 may not be provided with anchor bolts 7.

[0035] This embodiment uses a fiber woven mesh 3 instead of a steel mesh, eliminating the need for steel bar processing at the construction site. The fiber woven mesh 3 is light in weight, which can significantly improve construction efficiency and solve the problem of steel bar corrosion during subsequent use.

[0036] like Figure 3 As shown, when the wall 1 to be reinforced is an exterior wall, the fiber woven mesh 3 and the reinforced fiber mesh 4 on the outer surface of the wall 1 to be reinforced are bonded to the insulation layer 10 using an adhesive matrix 9, and a protective layer and an exterior decorative layer 11 are arranged on the outside of the insulation layer 10, or an insulation and decorative integrated panel is bonded using the adhesive matrix 9, so as to combine the reinforcement of the structural bearing capacity with the improvement of the insulation performance of the building exterior wall, thereby improving the comprehensive performance of the old masonry structure house.

[0037] Example 2 In another typical embodiment of the present invention, a method for reinforcing a multi-layer masonry wall is proposed, using the multi-layer masonry wall reinforcement node mentioned in Example 1, specifically as follows: Before the reinforcement construction, the surface plastering and decoration layer of the wall 1 to be reinforced should be removed to expose the brick surface, and the anchor groove 6 should be opened by static cutting method at the corresponding position of the fiberboard 5 end installation on the surface of the wall 1 to be reinforced on the upper and lower sides of the floor slab 2, and at the same time, a sheet-like hole for the fiberboard 5 to pass vertically should be opened on the floor slab 2; Clean the loose materials and floating dust on the surface of the wall 1 to be reinforced, in the anchor groove 6, and in the opening of the floor slab 2, and sprinkle water to moisten them. Then, apply primer in the anchor groove 6 and the opening of the floor slab 2. After the primer dries, pass the fiberboard 5 through the opening of the floor slab 2 and fix it. At the same time, stick and fix the two ends of the fiberboard 5 in the anchor groove 6 of the wall 1 to be reinforced on the upper and lower sides of the floor slab. The bonding matrix 9 is evenly applied on the surface of the masonry wall 1 to be reinforced. The bonding matrix 9 is made of cement mortar, polymer mortar or fine-grained concrete with a coating thickness of 5 to 7 mm. Then, the cut fiber woven mesh 3 is impregnated with the bonding matrix 9 and laid on the surface of the wall 1 to be reinforced, and pressed into the bonding matrix 9 on the surface of the wall 1 to be reinforced; When multiple layers of fiber woven mesh 3 are provided, the bonding matrix 9 is evenly applied on the inner layer of fiber woven mesh 3 laid on the surface of the wall 1 to be reinforced, and then the cut outer layer of fiber woven mesh 3 is impregnated with the bonding matrix 9 and laid on the surface of the inner layer of fiber woven mesh 3 evenly coated with the bonding matrix 9, and pressed into the bonding matrix 9 on the surface of the inner layer of fiber woven mesh 3, and the above operation process is repeated until all layers of fiber woven mesh 3 are pasted; After the outermost fiber woven mesh 3 is pasted, the reinforcing fiber mesh 4 is pasted on the outer sides of the outermost fiber woven mesh 3, the anchor bolts 7 are implanted on the surface of the outermost fiber woven mesh 3 and the reinforcing fiber mesh 4, and the gasket 8 is arranged on the inner side of the anchor bolt 7. The adhesive matrix 9 is evenly applied on the surface of the outermost fiber woven mesh 3, and the coating thickness is 5~10mm.

[0038] When the wall 1 to be reinforced is an exterior wall, the outermost bonding matrix 9 is used to bond the thermal insulation layer 10, and finally a protective layer and an exterior decoration layer 11 are made outside the thermal insulation layer 10, or the bonding matrix 9 is used to bond the thermal insulation decorative integrated board.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-layer masonry wall reinforcement node, comprising: The wall to be reinforced (1) is characterized in that the wall to be reinforced (1) is located on the upper and lower sides of a floor slab (2), a fiber woven mesh (3) is bonded and fixedly connected to the surface of the wall to be reinforced (1) via an adhesive matrix (9), and the fiber woven meshes (3) located on the upper and lower sides of the floor slab (2) are fixedly connected via a fiberboard (5), and the fiberboard (5) vertically penetrates the floor slab (2).

2. The multi-layer masonry wall reinforcement node according to claim 1, characterized in that: An anchoring groove (6) is provided on the wall (1) to be reinforced, and the fiberboard (5) vertically passes through the floor slab (2) and the end portion is fixedly arranged in the anchoring groove (6).

3. The multi-layer masonry wall reinforcement node according to claim 2, characterized in that: The depth of the anchoring groove (6) transitions from shallow to deep in a direction away from the floor slab (2).

4. The multi-layer masonry wall reinforcement node according to claim 1, characterized in that: The fiber woven mesh (3) on the surface of the wall (1) to be reinforced is provided with multiple layers, and adjacent layers of the fiber woven mesh (3) are fixedly connected by an adhesive matrix (9).

5. The multi-layer masonry wall reinforcement node according to claim 1, characterized in that: A reinforcing fiber mesh (4) is fixedly provided on the outer sides of the fiber woven mesh (3), and the reinforcing fiber mesh (4) is fixed by gluing via an adhesive matrix (9).

6. The multi-layer masonry wall reinforcement node according to claim 5, characterized in that: The reinforcing fiber mesh (4) is fixedly connected to the wall (1) to be reinforced via anchor bolts (7), and the anchor bolts (7) and the reinforcing fiber mesh (4) are in contact via gaskets (8).

7. The multi-layer masonry wall reinforcement node according to claim 1, characterized in that: The middle area of ​​the fiber braided mesh (3) is fixedly connected to the wall (1) to be reinforced via anchor bolts (7).

8. The multi-layer masonry wall reinforcement node according to claim 1, characterized in that: When the wall (1) to be reinforced is an exterior wall, the reinforcement layer on the exterior surface of the wall (1) to be reinforced is bonded to the thermal insulation layer (10) by means of an adhesive matrix (9), and a protective layer and an exterior decoration layer (11) are arranged on the exterior of the thermal insulation layer (10), the thermal insulation layer (10) and the exterior decoration layer (11) being a layered structure or a thermal insulation and decoration integrated board structure.

9. A reinforcement method, characterized in that: A multi-layer masonry wall reinforcement node as described in any one of claims 1 to 8 is used, specifically as follows: The surface of the wall to be reinforced (1) is processed to expose the brick surface, and anchor grooves (6) are opened on the wall to be reinforced (1) at the upper and lower sides of the floor slab (2), and a sheet-shaped opening is opened on the floor slab (2); Apply primer in the anchor groove (6) and in the opening of the floor slab (2), pass the fiberboard (5) through the opening of the floor slab (2) and fix it, and at the same time, glue and fix the two ends of the fiberboard (5) in the anchor grooves (6) of the wall (1) to be reinforced on the upper and lower sides of the floor slab (2); Evenly applying the bonding matrix (9) on the surface of the masonry wall to be reinforced, impregnating the fiber woven mesh (3) with the bonding matrix (9) and then laying and fixing it in the bonding matrix (9) on the surface of the wall (1) to be reinforced; When multiple layers of fiber braided mesh (3) are provided, they are laid layer by layer, and after the outermost layer of fiber braided mesh (3) is pasted, the reinforcing fiber mesh (4) is pasted on the outer sides of the outermost layer of fiber braided mesh (3), and the anchor bolts (7) are implanted.

10. The reinforcement method according to claim 9, characterized in that: When the wall (1) to be reinforced is an exterior wall, the outermost bonding matrix (9) is used to bond the thermal insulation layer (10), and a protective layer and an exterior decoration layer (11) are formed outside the thermal insulation layer (10), or the bonding matrix is ​​used to bond the thermal insulation decorative integrated board.

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