Wall reinforcement construction method

Abstract

The invention relates to the technical field of building construction, in particular to a wall reinforcement construction method, which comprises the following steps of: performing nondestructive testing on a wall to be reinforced by using structure detection equipment, determining potential weakness and crack positions in the wall, calibrating a specific area to be reinforced according to a detection result, and pre-marking a plurality of hole positions on the surface of the wall; positioning holes are drilled in the calibrated positions, selected steel bars are inserted into the positioning holes after being subjected to anti-corrosion treatment, the positioning holes are filled with concrete, and after the concrete is solidified, preliminary fixing of the steel bars and the wall is completed; the pre-embedded steel bars are sleeved with the prefabricated modules; the modules and the reinforcing steel bars are connected through the connecting pieces, the modules are spliced to be laid on the wall based on the arrangement mode of the modules on the wall, and the overall stability and anti-seismic performance of the wall are effectively enhanced by adopting the modular design and the fixing mode of reinforcing steel bar pre-burying.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and more particularly to a wall reinforcement construction method. Background Art

[0002] With the acceleration of urbanization, the safety and durability of building structures have received more and more attention. In particular, the stability of building walls, as an important part of the load-bearing structure, is directly related to the safety of the entire building. Therefore, effective reinforcement of building walls has become an important topic in engineering technology.

[0003] At present, the reinforcement methods of building walls mainly include the following: Carbon fiber reinforced polymer (CFRP) reinforcement: Use high-strength carbon fiber materials to enhance the bearing capacity and crack resistance of the wall by gluing or embedding. CFRP reinforcement has the advantages of light weight, high strength, and convenient construction, and is widely used in various building reinforcement projects.

[0004] Steel structure reinforcement: By adding steel plates, steel bars and other steel structure components on the surface or inside the wall, the tensile, compressive and shear resistance of the wall can be improved. The steel structure reinforcement method is suitable for projects that need to significantly increase the bearing capacity of the wall.

[0005] Shotcrete reinforcement: Use spraying technology to spray high-strength concrete onto the wall surface to form a solid protective layer, enhancing the overall strength and durability of the wall. This method has a fast construction speed and is suitable for large-area wall reinforcement.

[0006] Prestressed reinforcement: By applying prestressed tendons inside or on the surface of the wall, tension is applied in advance to offset the impact of external loads on the wall and improve its crack resistance and deformation resistance. Prestressed reinforcement is suitable for the reinforcement needs of high-rise buildings and earthquake-prone areas.

[0007] Although the above reinforcement methods have achieved certain results in practical applications, there are still some problems and limitations: steel structure reinforcement and prestressed reinforcement have complex construction processes and require a long construction period, which increases project costs and the impact on users; high-performance materials such as CFRP are relatively expensive, which limits their promotion and application in large-scale projects; some reinforcement materials may have problems with insufficient durability or poor environmental performance during long-term use, which does not conform to the development trend of modern green buildings. Summary of the invention

[0008] To this end, an object of the present invention is to provide a wall reinforcement construction method for improving the overall safety and economic benefits of the building structure.

[0009] To achieve the above object, the present invention provides the following technical solutions: A wall reinforcement construction method comprises the following steps: Step S1, wall surface detection and positioning: Use structural detection equipment to perform non-destructive testing on the wall to be reinforced to determine the potential weak points and crack locations in the wall. Based on the test results, the specific areas that need to be reinforced are identified, and multiple opening locations are pre-marked on the wall surface; Step S2, hole positioning: drilling positioning holes at the marked positions, with a hole diameter ranging from 30 to 50 mm and a depth of 70% to 80% of the wall thickness; Step S3: Pre-embedding and fixing of steel bars: After anti-corrosion treatment, the selected steel bars are inserted into the positioning holes. Fill the positioning holes with concrete, and after the concrete solidifies, complete the initial fixation of the steel bars and the wall; Step S4, module installation and fixing: the prefabricated module is mounted on the pre-buried steel bars; Use connectors to connect the modules to the steel bars, and based on the arrangement of the modules on the wall, splice the modules together to lay them on the wall; A mold is fixed at a corner of the wall. There is a cavity in the mold for placing the module. When the module is placed in the cavity, concrete is injected into the cavity to fix the module thereto.

[0010] The present invention is further configured as follows: the module is a quadrilateral, and grooves and inserts are respectively provided on two symmetrical side walls thereof, so that when two adjacent modules are spliced, the inserts extend into the grooves to fit and fix therewith.

[0011] The present invention is further configured as follows: the back of the module is in contact with the wall, a plurality of convex strips are provided on the back, a groove is formed between two adjacent convex strips, and the convex strips are T-shaped. The self-leveling glue is injected into the groove of the module to penetrate onto the back of the module and fill the gap between the module and the wall.

[0012] The present invention is further configured as follows: the portion of the steel bar extending out of the wall is provided with an external thread, and the module is provided with workstation holes corresponding to the number and position of the steel bars. After the module is sleeved on the steel bar, the module is connected to the steel bar through a connecting piece with internal threads, and the connecting piece squeezes the module.

[0013] The present invention is further configured as follows: the connecting piece is in a square shape, the center of which is provided with an internal threaded hole penetrating through the body, and the center of the connection is provided with a sleeve extending out of the thickness direction of the connecting piece, The module is provided with a docking portion for the sleeve to extend into, the docking portion is provided with an internal thread, and the outer peripheral wall of the sleeve is provided with an external thread, and the sleeve and the docking portion are threadedly connected.

[0014] The present invention is further configured such that: the convex strips are elastic.

[0015] The present invention is further configured as follows: the preparation ratio of the module includes the following main components: Bamboo fiber: 30%-50%, PLA: 20%-30%, recycled pulp: 10%-20%, gypsum: 10%-20%, castor oil: 5%-10%, activated carbon particles: 2%-5%, quartz sand: 5%-10%, gum arabic: 1%-3%, modified enzyme: 1%-2%, activator: 0.5%-1%.

[0016] The present invention is further configured as follows: the preparation steps of the module are as follows: Weigh each pre-treated material accurately according to the ratio requirements. During the mixing process, the bamboo fiber and gypsum are first mixed evenly to ensure that the ingredients are evenly distributed; Then add the liquid ingredients and use a mixing device to mix all the materials evenly until the desired cohesiveness and fluidity are achieved; The mixed material will be evenly injected into the pre-prepared mold to ensure that each mold cavity is filled with the mixture. After the material is injected into the mold, the composite material is heated to a temperature of 180°C-220°C and a pressure of 10-30MPa for 5-15 minutes using a hot pressing process to ensure that the material can be fully cured and form a solid module; After the module is formed, it is cooled. After the module is completely cooled, the mold is opened and the module is taken out of the mold. The demoulding module is inspected and the qualified module is cured, that is, the formed module is placed in a low temperature environment for 24-48 hours.

[0017] The present invention is further configured such that: a layer of nano coating is coated on the outer surface of the module.

[0018] The present invention is further configured as follows: a connecting hole is opened on the bottom of the mold, a pre-buried hole is drilled on the ground near the corner, and a bolt penetrates the connecting hole and the pre-buried hole to connect, so as to fix the mold.

[0019] Compared with the shortcomings of the prior art, the beneficial effects of the present invention are: The modular design and pre-embedded steel bars effectively enhance the overall stability and earthquake resistance of the wall. The modules are tightly combined with the steel bars, and then the wall is reinforced by squeezing the modules against the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a structural schematic diagram of the module of the present invention; Figure 3 It is a schematic diagram of the splicing of the modules of the present invention; Figure 4 This is a schematic diagram of placing the module of the present invention on a wall.

[0021] Wall 1, module 2, workstation hole 20, steel bar 3, groove 21, insert 22, convex strip 4, groove 5, connector 6, mold 7. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4 This embodiment describes in detail a wall reinforcement construction method, including the following steps: Step S1, wall surface detection and positioning: First, use structural detection equipment to perform non-destructive testing on the wall to obtain the actual condition inside the wall. Ultrasonic detectors and geological radar equipment can help identify potential weak points, cracks or voids in the wall and other unstable areas. During the detection process, construction personnel need to accurately record the location of the cracks in the wall, the size of the cracks, the depth and direction of the cracks to ensure the accuracy of subsequent reinforcement construction. The test results will be used to guide the subsequent hole positioning and module layout, mark the areas that need to be reinforced, and pre-mark the location of the holes on the wall surface to ensure the accuracy of the construction.

[0023] Step S2, hole positioning: The purpose of drilling positioning holes is to ensure that the steel bars can be accurately embedded in the wall. The diameter of the positioning holes is usually 30-50mm, and the depth is 70%-80% of the wall thickness. This diameter and depth design allows the steel bars to be effectively embedded in the wall, thereby enhancing the reinforcement effect. During the construction process, the hole position and hole depth need to be strictly controlled to avoid errors that lead to unsatisfactory reinforcement effects.

[0024] Step S3, pre-embedding and fixing of steel bars: Steel bars are important materials for wall reinforcement. The selected steel bars need to be treated for corrosion before entering the wall to prevent moisture or corrosion from affecting their performance in the future. The treated steel bars are inserted into the positioning holes, and the positioning holes are filled with concrete. After the concrete solidifies, the fixation of the steel bars and the wall is initially guaranteed. The proportion of concrete and its construction conditions need to be strictly controlled to ensure that the steel bars can be firmly embedded in the wall to avoid loosening.

[0025] Step S4, module installation and fixation: The design and manufacture of prefabricated modules need to be customized according to the actual situation of the wall to ensure that the module size, shape and splicing method are completely consistent with the wall. The module is mounted on the steel bar through the pre-embedded part of the steel bar, and the module is fixed to the steel bar with a connector. The module can be accurately connected during the splicing process through the structural design of the plug and groove to ensure the fixity and integrity between the modules.

[0026] A mold is installed at the corner of the wall, a connecting hole is opened on the bottom of the mold, and a pre-buried hole is drilled on the ground near the corner. Bolts are passed through the connecting hole and the pre-buried hole to connect the mold so as to fix the mold. The mold is used to ensure the accurate placement of the module, and the module is firmly fixed to the wall by injecting concrete to form a reinforced structure.

[0027] The steps for preparing the module are as follows: The pretreated materials are accurately weighed according to the ratio requirements. The specific first implementation ratio is: bamboo fiber: 30%, PLA: 20%, recycled pulp: 10%, gypsum: 10%, castor oil: 5%, activated carbon particles: 2%, quartz sand: 5%, gum arabic: 1%, modified enzyme: 1%, and activator: 0.5%.

[0028] The pretreated materials are accurately weighed according to the ratio requirements. The specific second implementation ratio is: bamboo fiber: 50%, PLA: 30%, recycled pulp: 20%, gypsum: 20%, castor oil: 10%, activated carbon particles: 5%, quartz sand: 10%, gum arabic: 3%, modified enzyme: 2%, and activator: 1%.

[0029] The pretreated materials are accurately weighed according to the ratio requirements. The specific third implementation ratio is: bamboo fiber: 40%, PLA: 25%, recycled pulp: 15%, gypsum: 15%, castor oil: 8%, activated carbon particles: 4%, quartz sand: 7%, gum arabic: 2%, modified enzyme: 1.8%, and activator: 0.6%.

[0030] The first implementation ratio, the second implementation ratio and the third implementation ratio are used in the following steps respectively.

[0031] During the mixing process, the bamboo fiber and gypsum are first mixed evenly to ensure that the ingredients are evenly distributed; Then add the liquid ingredients (recycled pulp castor, sesame oil, gum arabic, sex enzyme, active agent) and use a mixing device to mix all the materials evenly until the desired cohesiveness and fluidity are achieved; The mixed material will be evenly injected into the pre-prepared mold to ensure that each mold cavity is filled with the mixture. After the material is injected into the mold, the composite material is heated to a temperature of 180°C-220°C and a pressure of 10-30MPa for 5-15 minutes using a hot pressing process to ensure that the material can be fully cured and form a solid module; After the module is formed, it is cooled. After the module is completely cooled, the mold is opened and the module is taken out of the mold. The demoulding module is inspected and the qualified modules are cured. That is, the formed module is placed in a low temperature environment for 24-48 hours. Finally, a layer of nano coating is coated on the outer surface of the module.

[0032] Table 1 of the test data of the modules made based on the first implementation ratio, the second implementation ratio and the third implementation ratio is as follows:

[0033] The module is a quadrilateral with symmetrical two side walls, and grooves and inserts are respectively provided on the two side walls. The inserts extend into the grooves, and through the cooperation of this structure, adjacent modules can be precisely spliced ​​together. After the inserts extend into the grooves between two adjacent modules, the two are further fixed by riveting. This design not only enhances the fixing effect between modules, but also can effectively reduce the seams on the wall surface and improve the stability of the reinforced structure.

[0034] The back of the module is provided with a plurality of T-shaped convex strips, which are elastic and form grooves between adjacent convex strips for injecting self-leveling glue.

[0035] The T-shaped convex strip design allows the module to be more tightly combined with the wall during installation. Since the wall surface often has slight unevenness, the T-shaped convex strip is in close contact with the wall surface through its upper "cross wing" part. When the module is placed on the wall surface, the convex strip part can produce adaptive deformation with the uneven wall surface through its elasticity. This deformation allows the module to better contact with the wall surface, thereby improving the stability and bonding strength of the overall structure.

[0036] The self-leveling glue flows into the back groove through the channel and penetrates into the gap between the module and the wall. After the glue penetrates into the groove through the channel, it can further strengthen the bonding force between the module and the wall. The fluidity and viscosity of the self-leveling glue can better fill the gap between the wall and the module, and through the curing effect, a stable bonding layer is formed. In this way, when the module and the wall are subjected to external loads for a long time, the structure after the glue is cured will ensure that the wall reinforcement effect is long-lasting and stable.

[0037] The part of the steel bar extending out of the wall is provided with an external thread, and the module is provided with work position holes corresponding to the number and position of the steel bars. After the module is put on the steel bar, it is connected to the steel bar through a connector with an internal thread, and the connector squeezes the module.

[0038] The connecting piece is square in shape, with an internal threaded hole in the center passing through the main body, a sleeve extending out of the thickness direction of the connecting piece at the center of the connection, a docking portion for the sleeve to extend into is provided on the module, an internal thread is provided on the docking portion, and an external thread is provided on the outer peripheral wall of the sleeve, and the sleeve and the docking portion are threadedly connected.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A wall reinforcement construction method, characterized in that: The steps include: Step S1, wall surface detection and positioning: Use structural detection equipment to perform non-destructive testing on the wall to be reinforced to determine the potential weak points and crack locations in the wall. Based on the test results, the specific areas that need to be reinforced are identified, and multiple opening locations are pre-marked on the wall surface; Step S2, hole positioning: drilling positioning holes at the marked positions, with a hole diameter ranging from 30 to 50 mm and a depth of 70% to 80% of the wall thickness; Step S3: Pre-embedding and fixing of steel bars: After anti-corrosion treatment, the selected steel bars are inserted into the positioning holes. Fill the positioning holes with concrete, and after the concrete solidifies, complete the initial fixation of the steel bars and the wall; Step S4, module installation and fixing: the prefabricated module is mounted on the pre-buried steel bars; Use connectors to connect the modules to the steel bars, and based on the arrangement of the modules on the wall, splice the modules together to lay them on the wall; A mold is fixed at a corner of the wall. There is a cavity in the mold for placing the module. When the module is placed in the cavity, concrete is injected into the cavity to fix the module thereto.

2. A wall reinforcement construction method according to claim 1, characterized in that: The module is a quadrilateral, and grooves and inserting parts are respectively arranged on two symmetrical side walls, so that when two adjacent modules are spliced, the inserting parts extend into the grooves to fit and fix therewith.

3. A wall reinforcement construction method according to claim 2, characterized in that: The back of the module is in contact with the wall, and a plurality of convex strips are arranged on the back, and a groove is formed between two adjacent convex strips, and the convex strips are T-shaped. The self-leveling glue is injected into the groove of the module to penetrate onto the back of the module and fill the gap between the module and the wall.

4. A wall reinforcement construction method according to claim 2, characterized in that: The portion of the steel bar extending out of the wall is provided with an external thread, and the module is provided with workstation holes corresponding to the number and position of the steel bars. After the module is sleeved on the steel bar, the module is connected to the steel bar through a connecting piece with internal threads, and the connecting piece squeezes the module.

5. A wall reinforcement construction method according to claim 2, characterized in that: The connecting piece is in a square shape, with an internal threaded hole at its center penetrating the body, and a sleeve extending out of the thickness direction of the connecting piece at the center of the connection. The module is provided with a docking portion for the sleeve to extend into, the docking portion is provided with an internal thread, and the outer peripheral wall of the sleeve is provided with an external thread, and the sleeve and the docking portion are threadedly connected.

6. A wall reinforcement construction method according to claim 2, characterized in that: The convex strips are elastic.

7. A wall reinforcement construction method according to claim 1, characterized in that: The preparation ratio of the module includes the following main components: Bamboo fiber: 30%-50%, PLA: 20%-30%, recycled pulp: 10%-20%, gypsum: 10%-20%, castor oil: 5%-10%, activated carbon particles: 2%-5%, quartz sand: 5%-10%, gum arabic: 1%-3%, modified enzyme: 1%-2%, activator: 0.5%-1%.

8. A wall reinforcement construction method according to claim 7, characterized in that: The preparation steps of the module are as follows: Weigh each pre-treated material accurately according to the ratio requirements. During the mixing process, the bamboo fiber and gypsum are first mixed evenly to ensure that the ingredients are evenly distributed; Then add the liquid ingredients and use a mixing device to mix all the materials evenly until the desired cohesiveness and fluidity are achieved; The mixed material will be evenly injected into the pre-prepared mold to ensure that each mold cavity is filled with the mixture. After the material is injected into the mold, the composite material is heated to a temperature of 180°C-220°C and a pressure of 10-30MPa for 5-15 minutes using a hot pressing process to ensure that the material can be fully cured and form a solid module; After the module is formed, it is cooled. After the module is completely cooled, the mold is opened and the module is taken out of the mold. The demoulding module is inspected and the qualified module is cured, that is, the formed module is placed in a low temperature environment for 24-48 hours.

9. A wall reinforcement construction method according to claim 8, characterized in that: A layer of nano coating is coated on the outer surface of the module.

10. A wall reinforcement construction method according to claim 2, characterized in that: A connecting hole is provided on the bottom of the mold, and a pre-buried hole is drilled on the ground near the corner of the wall. Bolts are passed through the connecting hole and the pre-buried hole to connect the mold so as to fix it.

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