Repair construction method for bare brick wall

Abstract

The invention relates to the technical field of house repairing, and discloses a bare brick wall repairing construction method which comprises the following steps: determining the surface layer condition of a bare brick wall, and cleaning the base layer of the bare brick wall; the surface damage degree of the bare brick wall is determined, and the surface damage of the bare brick wall is repaired; determining the damage degree of the damaged part of the bare brick wall, and repairing the damaged part of the bare brick wall; and repairing mortar joints of the plain brick wall. The problems that according to an existing bare brick wall repairing method, brick faces are prone to being damaged, really valuable parts of the bare brick wall cannot be reserved, and the repairing effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of house repair, and in particular to a construction method for repairing a plain brick wall. Background Art

[0002] Brick walls are a typical material and craftsmanship for the exterior surface of buildings, and are common in both ancient and modern Chinese architecture. As an important part of protecting the historical appearance of buildings, brick walls are prone to weathering, peeling, cracks, etc. under the influence of the long-term natural environment. These problems not only affect the aesthetics of the building, but more importantly, they may endanger the safety of the structure. Therefore, damaged brick walls need to be repaired.

[0003] In the related art, the repair method of exposed brick walls usually adopts the method of "covering with brick powder and grinding to reveal the base", that is, after the repair is completed, the brick surface is covered with arc-shaped grinding marks of an angle grinder, or the whole is covered with a thicker cement mortar and then repaired by tracing lines, which can easily damage the brick surface and fail to retain the truly valuable part of the exposed brick wall, resulting in a poor repair effect. Summary of the invention

[0004] In view of this, the present invention provides a construction method for repairing exposed brick walls to solve the problems of existing exposed brick wall repair methods, which are easy to damage the brick surface, fail to retain the truly valuable parts of the exposed brick walls, and have poor repair effects.

[0005] The present invention provides a method for repairing a plain brick wall, comprising the following steps:

[0006] Determine the surface condition of the exposed brick wall and clean the base of the exposed brick wall;

[0007] Determine the degree of surface damage of the exposed brick wall and repair the surface damage of the exposed brick wall;

[0008] Determine the degree of damage of the damaged parts of the exposed brick wall and repair the damaged parts of the exposed brick wall;

[0009] Repair the mortar joints of exposed brick walls.

[0010] In an optional implementation manner, the determining the surface condition of the exposed brick wall and cleaning the base of the exposed brick wall specifically includes:

[0011] When the surface condition of the exposed brick wall is a slight color difference caused by natural aging, no treatment is done;

[0012] When the surface of the exposed brick wall is dirty or discolored, it is cleaned and removed.

[0013] In an optional embodiment, when the surface of the exposed brick wall is dirty or discolored, the cleaning and removal treatment specifically includes:

[0014] For the dirt or discolored parts on the exposed brick wall, which are later attachments and coatings, use a water-degradable cleaning agent to remove them;

[0015] For the dirt or discolored parts on the exposed brick wall, they are painted parts, peeled off and the original exposed brick wall base is restored;

[0016] Repair holes, defects, cracks and peeling damage on the surface of the exposed brick wall;

[0017] Analyze the pollution status on the surface of the exposed brick wall, determine the cause of pollution, and determine the cleaning materials and processes after sampling. After the cleaning effect is satisfactory, use pressurized water for comprehensive cleaning.

[0018] In an optional implementation manner, the determining the degree of surface damage of the exposed brick wall and repairing the surface damage of the exposed brick wall specifically include:

[0019] Chisel away the inferior materials and loose parts on the surface of the exposed brick wall, and clean the surface;

[0020] When the wall surface is slightly damaged and the weathering degree is less than 5mm, the surface weathering layer is removed by manual cleaning and sandpaper polishing, and the surface is solidified by spraying intensifier;

[0021] When the wall is damaged and weathered to a degree of 5-20mm, apply the interface agent to the cleaned base. After the base is leveled, leave at least 4mm of brick powder for painting. After the surface is solidified, use special brick powder to repair it.

[0022] When the wall is damaged and the degree of weathering is greater than 20mm, the old wall bricks will be removed and repaired by tile patch or brick replacement technology;

[0023] After the repair is completed, the construction site is maintained. After the preset maintenance time, a penetrating hydrophobic protective agent is sprayed and waterproof and anti-fouling treatment is performed.

[0024] In an optional implementation manner, the determining the damage degree of the damaged part of the exposed brick wall and repairing the damaged part of the exposed brick wall specifically include:

[0025] When the facade brick wall is damaged or cracked and the damage depth and area cannot be repaired by locally repairing bricks with existing materials, the damaged bricks shall be replaced for repair;

[0026] Facade brick walls with severe corrosion, hollowing or cracks are repaired by partially demolishing and rebuilding.

[0027] In an optional implementation manner, the repairing by replacing the damaged bricks specifically includes:

[0028] Manual chiseling requires replacing the mortar joints around the bricks, and then removing the bricks with serious damage on the surface;

[0029] Remove dirt and debris from the brick holes and scrub them clean;

[0030] Choose new mortar with the same performance as the original mortar;

[0031] Use a trowel to push the mortar belly back into the wet bricks;

[0032] Fill the joints with traditional mortar caulking technology and grout according to the original brick grouting method;

[0033] Carry out cleaning of construction and maintain the newly replaced bricks and mortar joints.

[0034] In an optional implementation, the repair by partial demolition and reconstruction specifically includes:

[0035] For the bottom walls of multi-storey houses with serious corrosion, the method of "beam erection and digging and laying" is adopted. After steel and wood support, the corroded wall is dismantled and dug in sections. Each section is 1-1.2m long. Joints are left and the joints are dug and laid in sections continuously until all the corroded parts are dug and replaced. The top horizontal seams of the replaced parts are plugged with sheets and filled with mortar.

[0036] For partial replacement of the supporting masonry at the beam end, repairs are carried out by replacing the masonry or replacing the supporting pads under the beam end, depending on the load on the beam, the end pressure and the degree of damage to the masonry.

[0037] In an optional embodiment, the repairing by partial demolition and rebuilding also includes:

[0038] When bricks are being repaired, tape is used to stick around the edges of the bricks being repaired.

[0039] In an optional embodiment, the repairing of the mortar joints of the exposed brick wall specifically includes:

[0040] Chisel out the original deteriorated and loose mortar joints, clean and moisten the contact surface to prevent shrinkage;

[0041] Fill the mortar in layers. For brick walls, leave a gap of at least 2cm deep at the joints. Before filling the next layer, ensure that the previous layer of mortar has a certain hardness. Do it three times, filling 1 / 3 of the depth each time.

[0042] After the filling is completed, the excess mortar is cleaned up and the surface of the brick wall is grouted with concave joints;

[0043] The grouting is done in the order of horizontal first and then vertical;

[0044] After the construction is completed, protective measures should be taken to prevent the construction site from being damaged by rain and frost within the preset time.

[0045] In an optional embodiment, the mortar is M5 mixed mortar, and the mass ratio of cement, yellow sand, lime paste and water in each cubic meter of the M5 mixed mortar is 1:5.8:0.4:1.12.

[0046] The technical solution of the present invention has the following advantages:

[0047] The present invention evaluates and confirms the surface condition of the exposed brick wall, the degree of surface damage and the degree of damage of the diseased parts of the exposed brick wall, selects an appropriate repair method, and retains the valuable surface layer in accordance with the principle of minimum intervention. Excessive repair is not performed, and the original appearance of the exposed brick wall is maintained as much as possible to provide the best repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A flow chart of a method for repairing a plain brick wall according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the surface condition of the exposed brick wall according to an embodiment of the present invention, which is a slight color difference caused by natural aging;

[0051] Figure 3 This is a schematic diagram showing that the surface of the exposed brick wall according to an embodiment of the present invention is stained or discolored. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0053] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0054] According to an embodiment of the present invention, a method for repairing a plain brick wall is provided, comprising the following steps:

[0055] Step 101, determine the surface condition of the exposed brick wall, and clean the base of the exposed brick wall.

[0056] In the embodiment of the present invention, the surface condition of the exposed brick wall is analyzed and confirmed so as to distinguish different surface conditions and select corresponding base cleaning methods, so as to maintain the original appearance of the exposed brick wall as much as possible without excessive cleaning.

[0057] Step 102: determine the degree of surface damage of the exposed brick wall, and repair the surface damage of the exposed brick wall.

[0058] In the embodiment of the present invention, the degree of surface damage of the exposed brick wall is analyzed and confirmed so as to distinguish different degrees of surface damage and select corresponding surface damage repair methods, so as to maintain the original appearance of the exposed brick wall as much as possible, avoid excessive repairs, and retain its original appearance as much as possible.

[0059] Step 103, determine the damage degree of the damaged part of the exposed brick wall, and repair the damaged part of the exposed brick wall.

[0060] In the embodiment of the present invention, the degree of damage of the damaged part of the exposed brick wall is analyzed and confirmed, so as to distinguish the degree of damage of different damaged parts and select the corresponding repair method of the damaged part, so as to restore the original appearance of the exposed brick wall as much as possible, avoid excessive repair, preserve the original wall structure as much as possible, and avoid secondary damage.

[0061] Step 104: Repair the mortar joints of the exposed brick wall.

[0062] Mortar joints refer to the mortar layer between two bricks during wall construction. Their main function is to evenly transfer pressure and adhesion to increase the integrity of the wall. Mortar joints are divided into horizontal mortar joints and vertical mortar joints. The mortar joints between the upper and lower skins of the blocks are called horizontal joints, and the joints between adjacent blocks are called vertical joints.

[0063] It should be noted that when repairing the mortar joints, ensure their waterproof performance and aesthetics.

[0064] In the embodiment of the present invention, after the base of the exposed brick wall is cleaned, the surface damage is repaired, and the damaged parts are repaired, the mortar joints are repaired.

[0065] In the embodiment of the present invention, firstly, the surface condition of the exposed brick wall is analyzed and confirmed, so as to distinguish different surface conditions and select corresponding base cleaning methods for cleaning, so as to keep the original appearance of the exposed brick wall as much as possible without excessive cleaning. Secondly, the degree of surface damage of the exposed brick wall is analyzed and confirmed, so as to distinguish different degrees of surface damage and select corresponding surface damage repair methods, so as to keep the original appearance of the exposed brick wall as much as possible without excessive repair. Then, the degree of damage of the diseased part of the exposed brick wall is analyzed and confirmed, so as to distinguish different degrees of damage of the diseased part and select corresponding surface damage repair methods. The corresponding repair method for the surface defective part should be selected to restore the original appearance of the exposed brick wall as much as possible, without excessive repair, and keep its original wall structure as much as possible. At the same time, avoid secondary damage during the repair process, repair the mortar joints of the exposed brick wall again, and perform surface protection after the repair is completed; the exposed brick wall repair construction method provided in this embodiment follows the principle of minimum intervention and adopts different methods according to different situations to carry out repair construction, keep the original appearance of the exposed brick wall as much as possible, do not carry out excessive repair, so as to provide the best repair effect, and solve the problems of the existing exposed brick wall repair method, which is easy to damage the brick surface, cannot keep the truly valuable parts of the exposed brick wall, and has poor repair effect.

[0066] In one embodiment, step 101 specifically includes the following sub-steps:

[0067] Step S101: when the surface condition of the exposed brick wall is a slight color difference caused by natural aging, no treatment is performed;

[0068] Step S102: When the surface of the exposed brick wall is dirty or discolored, cleaning and removal treatment is performed.

[0069] It should be noted that dirt or discoloration is caused by paint, coatings, water stains, animal feces, fungi, efflorescence, smoke and rust attached to the wall surface of the exposed brick wall.

[0070] In the embodiment of the present invention, Figure 2 As shown in the figure, when the surface condition of the exposed brick wall is a slight color difference caused by natural aging, no treatment is performed to keep its original appearance; Figure 3 As shown, when the surface of the exposed brick wall is dirty or discolored, it affects the aesthetics of the wall and accelerates the weathering and other diseases of the exposed brick wall. Therefore, it is necessary to clean and remove the dirt according to the type of pollution or discoloration to restore the original appearance of the exposed brick wall.

[0071] In one embodiment, step S102 specifically includes the following sub-steps:

[0072] For the dirt or discolored parts on the plain brick wall, which are later attachments and paint, a water-degradable cleaning agent is used to remove them. It should be noted that the cleaning agent can be a graffiti remover, a paint stripper or similar materials to remove later attachments or paint.

[0073] If the dirt or discolored parts on the exposed brick wall are painted parts, peel them off and restore the original exposed brick wall base;

[0074] Repair holes, defects, cracks and peeling damage on the surface of the exposed brick wall;

[0075] Analyze the pollution status on the surface of the exposed brick wall, determine the cause of pollution, and determine the cleaning materials and processes after sampling. After the cleaning effect is satisfactory, use pressurized water for comprehensive cleaning.

[0076] In the embodiment of the present invention, different cleaning methods can be adopted according to different dirt or discolored parts, and excessive cleaning is not allowed to prevent the surface of the exposed brick wall from losing its original appearance. The cause of pollution is analyzed according to different pollution types, and different cleaning processes are adopted accordingly. For example, when the polluted part is graffiti, a graffiti remover is used for cleaning. Before cleaning, the holes, defects, cracks and peeling damage on the wall are repaired to improve the cleaning effect.

[0077] In one embodiment, step 102 specifically includes the following sub-steps:

[0078] Step S201, chiseling away inferior materials and loose parts on the surface of the exposed brick wall, and cleaning the surface.

[0079] In the embodiment of the present invention, inferior materials and loose parts on the surface of the exposed brick wall are chiseled off and the surface is cleaned, so that subsequent damage repair is facilitated and the repair effect is improved.

[0080] Step S202: When the wall surface is slightly damaged and the weathering degree is less than 5 mm, the surface weathering layer is removed by manual cleaning and sandpaper polishing, and the surface is cured by spraying an intensifier.

[0081] It should be noted that, in principle, parts of the wall that are slightly damaged or weathered less than 5mm will not be repaired on the surface, and the original slightly damaged condition will be retained.

[0082] In the embodiment of the present invention, the part of the wall surface that is slightly damaged and weathered less than 5 mm is only processed by manual cleaning and sandpaper polishing, so as to retain the original slightly damaged state as much as possible to avoid further damage.

[0083] Step S203: When the wall surface is damaged and weathered to a degree of 5-20 mm, apply the interface agent to the cleaned base layer. After the base layer is leveled, leave at least 4 mm of brick powder thickness, and repair it with special brick powder after the surface is solidified.

[0084] It should be noted that the color difference of the powder should be close to the color difference of the original bricks to improve the restoration effect.

[0085] In the embodiment of the present invention, for the damaged wall surface and the weathering degree of 5-20mm, brick powder is used to repair it, without the need for large-scale repair, and more parts of the original bricks are retained to keep the original appearance as much as possible.

[0086] Step S204: When the wall surface is damaged and the degree of weathering is greater than 20 mm, the old wall tile saw blades are removed and repaired by using tile paving or brick replacement technology.

[0087] In the embodiment of the present invention, for the damaged part of the wall surface and the part with weathering degree greater than 20 mm, the old wall brick saw blade is used to repair it to avoid color difference.

[0088] Step S205: After the repair is completed, the construction site is maintained, and after a preset maintenance time, a penetrating hydrophobic protective agent is sprayed, and a waterproof and antifouling treatment is performed.

[0089] In the embodiment of the present invention, the construction site is maintained after the repair is completed. The maintenance time is preferably 7 days to ensure the construction effect. At the same time, a penetrating hydrophobic protective agent is sprayed and waterproof and anti-fouling treatment is performed to increase the service life of the wall.

[0090] In one embodiment, step 103 specifically includes the following sub-steps:

[0091] Step S301: When the facade brick wall is damaged or cracked and the damage depth and area cannot be repaired by locally repairing bricks with existing materials, the damaged bricks are replaced for repair.

[0092] Step S302: The facade brick walls with serious corrosion, hollowing or cracks are repaired by partially demolishing and rebuilding.

[0093] In the embodiment of the present invention, the degree and type of damage to the facade brick wall can be repaired by replacing damaged bricks or partially demolishing and rebuilding, and the specific selection can be made according to the actual situation.

[0094] In one embodiment, step S301 specifically includes the following sub-steps:

[0095] Manual chiseling requires replacing the mortar joints around the bricks, and then removing bricks with severely damaged surfaces.

[0096] Remove dirt and debris from the brick holes and scrub them clean.

[0097] Choose new mortar with the same performance as the original mortar. Make the performance and appearance of the mortar joints repaired with the new mortar the same as those filled with the original mortar, and restore the original appearance to the greatest extent.

[0098] Use a trowel to work the mortar base into the wet bricks.

[0099] Fill the joints with traditional mortar grouting technology and grout according to the original brick material grouting method.

[0100] Carry out cleaning of construction and maintain the newly replaced bricks and mortar joints.

[0101] In one embodiment, step S302 specifically includes the following sub-steps:

[0102] For the walls at the bottom of multi-story houses that are severely corroded, the "beam erection and digging and laying" method is adopted. After taking steel and wood supports, the corroded wall body is dismantled and dug out in sections. Each section is 1-1.2m long. Joints are left and the joints are dug out and laid out in sections continuously until all the corroded parts are dug out and replaced. The top horizontal seams of the replaced parts are plugged with sheet materials and filled with mortar.

[0103] It should be noted that the repaired wall should have firm overlaps, good interlocking and full mortar; the mortar used for repair should be as consistent as possible with the original mortar in composition and performance; steel sheets can be used as sheet materials.

[0104] In the embodiment of the present invention, steel-wood beams are used for support and the wall is repaired in sections, thereby ensuring the stability of the wall during the repair process.

[0105] For partial replacement of the supporting masonry at the beam end, repairs are carried out by replacing the masonry or replacing the supporting pads under the beam end, depending on the load on the beam, the end pressure and the degree of damage to the masonry.

[0106] In the embodiment of the present invention, when the supporting masonry at the beam end is partially replaced, the repair can be carried out by replacing the masonry or replacing the supporting pad under the beam end to ensure stability during the repair process.

[0107] In one embodiment, step S302 further includes:

[0108] When bricks are being repaired, tape is used to stick around the edges of the bricks being repaired.

[0109] In the embodiment of the present invention, the periphery of the patched bricks is adhered with adhesive tape to avoid contamination of adjacent bricks.

[0110] In one embodiment, step 104 specifically includes the following sub-steps:

[0111] Chisel out the original deteriorated and loose mortar joints, clean and moisten the contact surfaces to prevent shrinkage.

[0112] Fill the mortar in layers. For brick walls, leave a gap of at least 2 cm deep at the joints. Before filling the next layer, ensure that the previous layer of mortar has a certain hardness. Do it in three times, filling 1 / 3 of the depth each time.

[0113] After the filling is completed, the excess mortar is cleaned up, and the surface of the brick wall is grouted in the form of concave grouting. It should be noted that grouting is an important process. After the bottom joint is grouted, the repaired brick surface is flattened with a facade flat color agent. The main purpose of flat color is to achieve a jump color treatment and natural color separation with the appearance of the original clear water brick surface. When grouting the surface joints, the color of the grouting agent should be consistent with the original wall brick joints, and the brick joints should be filled evenly, full and densely. The grouting should be done from top to bottom, first the horizontal joints, and then the vertical joints. The wall grouting should be horizontal and vertical, with consistent depth, and the cross joints should be overlapped and flat, compacted and polished, without any omissions.

[0114] The joints should be grouted in the order of horizontal first and then vertical.

[0115] After the construction is completed, protective measures should be taken to prevent the construction site from being damaged by rain and frost within the preset time.

[0116] In the embodiment of the present invention, protective measures are adopted, such as setting up a bracket and covering it with a waterproof cloth, to protect the construction site from being damaged by rain and frost within a preset time, preferably 24 hours, to ensure the repair effect of the construction site.

[0117] In one embodiment, the mortar is M5 mixed mortar, and the mass ratio of cement, yellow sand, lime paste and water in each cubic meter of M5 mixed mortar is 1:5.8:0.4:1.12.

[0118] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for repairing a plain brick wall, characterized in that: The following steps are involved: Determine the surface condition of the exposed brick wall and clean the base of the exposed brick wall; Determine the degree of surface damage of the exposed brick wall and repair the surface damage of the exposed brick wall; Determine the degree of damage of the damaged parts of the exposed brick wall and repair the damaged parts of the exposed brick wall; Repair the mortar joints of exposed brick walls.

2. The method for repairing a plain brick wall according to claim 1, characterized in that: Determining the surface condition of the exposed brick wall and cleaning the base of the exposed brick wall specifically include: When the surface condition of the exposed brick wall is a slight color difference caused by natural aging, no treatment is done; When the surface of the exposed brick wall is dirty or discolored, it is cleaned and removed.

3. The method for repairing a plain brick wall according to claim 2, characterized in that: When the surface of the exposed brick wall is dirty or discolored, the cleaning and removal treatment specifically includes: For the dirt or discolored parts on the exposed brick wall, which are later attachments and coatings, use a water-degradable cleaning agent to remove them; For the dirt or discolored parts on the exposed brick wall, they are painted parts, peeled off and the original exposed brick wall base is restored; Repair holes, defects, cracks and peeling damage on the surface of exposed brick walls; Analyze the pollution status on the surface of the exposed brick wall, determine the cause of pollution, and determine the cleaning materials and processes after sampling. After the cleaning effect is satisfactory, use pressurized water for comprehensive cleaning.

4. The method for repairing a plain brick wall according to claim 1, characterized in that: Determining the degree of surface damage of the exposed brick wall and repairing the surface damage of the exposed brick wall specifically include: Chisel away the inferior materials and loose parts on the surface of the exposed brick wall, and clean the surface; When the wall surface is slightly damaged and the weathering degree is less than 5mm, the surface weathering layer is removed by manual cleaning and sandpaper polishing, and the surface is cured by spraying intensifier; When the wall is damaged and weathered to a degree of 5-20mm, apply the interface agent to the cleaned base. After the base is leveled, leave at least 4mm of brick powder for painting. After the surface is solidified, use special brick powder to repair it. When the wall is damaged and the degree of weathering is greater than 20mm, the old wall bricks will be removed and repaired by tile patch or brick replacement technology; After the repair is completed, the construction site is maintained. After the preset maintenance time, a penetrating hydrophobic protective agent is sprayed and waterproof and anti-fouling treatment is performed.

5. The method for repairing a plain brick wall according to claim 1, characterized in that: Determining the degree of damage of the damaged part of the exposed brick wall and repairing the damaged part of the exposed brick wall specifically include: When the facade brick wall is damaged or cracked and the damage depth and area cannot be repaired by locally repairing bricks with existing materials, the damaged bricks shall be replaced for repair; Facade brick walls with severe corrosion, hollowing or cracks are repaired by partially demolishing and rebuilding.

6. The method for repairing a plain brick wall according to claim 5, characterized in that: The repair method of replacing damaged bricks specifically includes: Manual chiseling requires replacing the mortar joints around the bricks, and then removing the bricks with serious damage on the surface; Remove dirt and debris from the brick holes and scrub them clean; Choose new mortar with the same performance as the original mortar; Use a trowel to push the mortar belly back into the wet bricks; Fill the joints with traditional mortar caulking technology and grout according to the original brick material grouting method; Carry out cleaning of construction and maintain the newly replaced bricks and mortar joints.

7. The method for repairing a plain brick wall according to claim 5, characterized in that: The repair by partial demolition and reconstruction specifically includes: For the bottom walls of seriously corroded multi-storey houses, the "beam erection and digging and laying" method is adopted. After steel and wood support, the corroded wall is dismantled and dug in sections. Each section is 1-1.2m long. Joints are left and the joints are dug and laid in sections continuously until all the corroded parts are dug and replaced. The top horizontal seams of the replaced parts are plugged with sheets and filled with mortar. For partial replacement of the supporting masonry at the beam end, repairs are carried out by replacing the masonry or replacing the supporting pads under the beam end, depending on the load on the beam, the end pressure and the degree of damage to the masonry.

8. The method for repairing a plain brick wall according to claim 7, characterized in that: The repair by partial demolition and reconstruction also includes: When bricks are being repaired, tape is used to stick around the edges of the bricks being repaired.

9. The method for repairing a plain brick wall according to claim 1, characterized in that: The repair of the mortar joints of the exposed brick wall specifically includes: Chisel out the original deteriorated and loose mortar joints, clean and moisten the contact surface to prevent shrinkage; Fill the mortar in layers. For brick walls, leave a gap of at least 2cm deep at the joints. Before filling the next layer, ensure that the previous layer of mortar has a certain hardness. Do it three times, filling 1 / 3 of the depth each time. After the filling is completed, the excess mortar is cleaned up and the surface of the brick wall is grouted with concave joints; The grouting is done in the order of horizontal first and then vertical; After the construction is completed, protective measures should be taken to prevent the construction site from being damaged by rain and frost within the preset time.

10. The method for repairing a plain brick wall according to claim 9, characterized in that: The mortar is M5 mixed mortar, and the mass ratio of cement, yellow sand, lime paste and water in each cubic meter of the M5 mixed mortar is 1:5.8:0.4:1.12.

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