Anti-crack inner wall structure of modular building and construction method

Abstract

The invention relates to the technical field of modular buildings, in particular to an anti-crack inner wall structure of a modular building and a construction method. The interior wall comprises an interior wall body, a putty layer and an isolating layer, the inner wall surface of the inner wall body is provided with an easy-cracking area; the isolation layer is made of a flexible sheet material, the thickness of the isolation layer is smaller than or equal to 0.5 mm, and the isolation layer is only fixedly laid in the easy-to-crack area and covers the easy-to-crack area; and the putty layer is plastered on the inner wall surface and covers the isolating layer. The isolation layer is independently arranged in the easy-to-crack area of the inner wall surface of the inner wall body, the isolation layer is wrapped by the putty layer, and the isolation layer can effectively block a conduction path of micro cracks of the concrete base layer in the easy-to-crack area by utilizing the flexibility characteristic of the isolation layer, so that the cracks of the concrete base layer are prevented from being reflected upwards to the putty layer, and reflection cracks of the putty layer are effectively reduced. The isolation layer is made of a flexible sheet material with the thickness smaller than or equal to 0.5 mm and is only fixedly laid in the easy-to-crack area, the weight of the module box body is reduced, and transportation and construction burdens caused by weight increase are avoided.

Description

Technical Field

[0001] This invention relates to the field of modular building technology, and in particular to a crack-resistant interior wall structure and construction method for modular buildings. Background Technology

[0002] Modular construction refers to the prefabrication of various spatial units of a building into standardized prefabricated modules in a factory. The main structure, pre-installed indoor pipelines, and interior decoration are all completed in the factory. The building then only needs to be transported to the construction site and assembled according to the design plan to complete construction. This construction method can significantly improve construction efficiency and shorten the overall construction period.

[0003] In modular building systems, the putty layer in the interior walls of completed concrete modular boxes is prone to cracking, particularly at the joints of wall panels and around embedded junction boxes. This is primarily because these wall areas are susceptible to micro-cracks. Due to the transmission effect of cracks in the base layer, the surface putty layer will subsequently develop reflective cracks (the cracks in the base layer propagate upwards to the surface decorative layer, causing simultaneous cracking in the decorative layer). Putty layer cracking not only detracts from the aesthetics of the interior decoration but can also lead to putty peeling off, requiring rework and increasing project costs.

[0004] To address the issue of cracking in interior wall putty, a common practice is to apply crack-resistant mortar and lay fiberglass mesh on the interior wall surface to enhance its crack resistance. However, applying crack-resistant mortar and laying fiberglass mesh increases the thickness of the wall structure, leading to an increase in the overall weight of the modular enclosure and adding extra work to the construction. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a crack-resistant interior wall structure and construction method for modular buildings, which solves the technical problems that the use of crack-resistant mortar and fiberglass mesh in the interior wall structure of existing modular buildings easily increases the overall weight of the module box, increases the thickness of the wall structure, and increases the amount of construction work.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] On one hand, the present invention provides a crack-resistant interior wall structure for modular buildings, including an interior wall body, a putty layer, and an isolation layer; the interior wall body has a crack-prone area on its inner wall surface; the isolation layer is a flexible sheet material with a thickness of ≤0.5mm, and the isolation layer is only fixedly laid on the crack-prone area and covers the crack-prone area; the putty layer is applied to the interior wall surface and covers the isolation layer.

[0010] Preferably, the isolation layer is alkali-resistant kraft paper or crack-resistant tape that has been waterproofed and impregnated.

[0011] Preferably, the isolation layer is adhered to the crack-prone area by an adhesive layer; the thickness of the adhesive layer is ≤0.5mm.

[0012] Preferably, the isolation layer is bonded to the putty layer through an interface agent layer.

[0013] Preferably, the crack-prone area includes the joint area of ​​the interior wall and the area around the junction box; for the joint area, the isolation layer is fixedly laid in the joint area and extends along the length of the joint to cover the joint; for the area around the junction box, the isolation layer has reserved through holes for the junction box and is fixedly laid around the junction box.

[0014] On the other hand, the present invention provides a construction method for forming a crack-resistant interior wall structure for a modular building as described above, comprising the following steps:

[0015] S1: Determine the crack-prone area of ​​the inner wall surface, and accordingly determine the size and area of ​​the isolation layer to be laid in the crack-prone area;

[0016] S2: Apply adhesive to the crack-prone area;

[0017] S3: Fix the determined isolation layer onto the crack-prone area coated with the adhesive;

[0018] S4: Apply the putty layer to the inner wall surface and cover the isolation layer (3).

[0019] Preferably, before step S2, a step S0 is included to perform a waterproof impregnation treatment on the isolation layer.

[0020] Preferably, step S0 is: immersing the isolation layer in a silane impregnating agent for 0.5 hours to 1 hour, and then removing the isolation layer and drying it after impregnation.

[0021] Preferably, before step S4, step S31 is included, specifically step S31 is to apply an interface agent to the surface of the isolation layer away from the inner wall.

[0022] Preferably, before step S31, there is also step S30, which specifically involves laying the isolation layer on the inner wall surface, using a plastic scraper to smooth the isolation layer, and expelling the air between the isolation layer and the inner wall surface.

[0023] (III) Beneficial Effects

[0024] The beneficial effects of this invention are:

[0025] This invention discloses a crack-resistant interior wall structure and construction method for modular buildings. By separately setting an isolation layer in the crack-prone areas of the interior wall, and covering the isolation layer with a putty layer, the isolation layer, being a flexible sheet material, effectively blocks the transmission path of micro-cracks in the concrete substrate in the crack-prone areas, preventing cracks in the concrete substrate from reflecting upwards to the putty layer. This avoids the impact of interior wall cracking on the putty layer and effectively reduces the occurrence of reflective cracks in the putty layer. Furthermore, the isolation layer uses a flexible sheet material with a thickness of ≤0.5mm, and it is only fixedly laid in the crack-prone areas, rather than being laid on the entire interior wall surface. Compared to the prior art of applying crack-resistant mortar and laying fiberglass mesh on the entire interior wall surface, the crack-resistant interior wall structure in this embodiment can significantly reduce the structural thickness and lighten the weight of the modular box, thereby avoiding the burden of transportation and construction due to increased weight. Meanwhile, since the crack-resistant interior wall structure of this embodiment only lays an isolation layer in the crack-prone areas, it can reduce the amount of construction work, improve construction efficiency, and significantly reduce the amount of construction materials used, thereby further reducing construction costs. This ensures that the putty layer prevents reflective cracks from appearing on itself due to the effective blocking of crack transmission from the concrete base layer of the interior wall surface by the isolation layer, so as to further ensure the flatness and decorative consistency of the interior wall surface. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the joint area in an embodiment of a crack-resistant interior wall structure and construction method for a modular building according to the present invention.

[0027] Figure 2 This is a top sectional view of the joint area in an embodiment of a crack-resistant interior wall structure and construction method for a modular building according to the present invention.

[0028] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 4 This is a schematic diagram of the overall three-dimensional disassembly structure of the area surrounding the junction box in Embodiment 1 of a modular building crack-resistant interior wall structure and construction method of the present invention.

[0030] Figure 5 This is a top sectional view of the area surrounding the junction box, which is an embodiment of the crack-resistant interior wall structure and construction method of a modular building according to the present invention.

[0031] Figure 6 This is a schematic diagram illustrating the steps of a modular building's crack-resistant interior wall structure and construction method according to the present invention.

[0032] Figure 7 This is a test specimen table for Embodiment 4 of the present invention, which describes a crack-resistant interior wall structure and construction method for a modular building.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1: Interior wall; 11: Area prone to cracking; 2: Putty layer; 3: Isolation layer; 4: Adhesive layer; 5: Interface agent layer. Detailed Implementation

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0036] Example 1

[0037] This embodiment of a modular building crack-resistant interior wall structure includes an interior wall 1, a putty layer 2, and an isolation layer 3.

[0038] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the inner wall surface of the inner wall 1 has a crack-prone area 11. The isolation layer 3 is a flexible sheet material with a thickness of ≤0.5mm, and the isolation layer 3 is only fixedly laid on the crack-prone area 11 and covers the crack-prone area 11. The putty layer 2 is applied to the inner wall surface and covers the isolation layer 3. By setting the isolation layer 3 separately in the crack-prone area 11 of the inner wall surface of the inner wall 1, and the putty layer 2 covering the isolation layer 3, and the isolation layer 3 being a flexible sheet material, its flexible properties can effectively block the transmission path of micro-cracks in the concrete base layer of the crack-prone area 11, preventing cracks in the concrete base layer from reflecting upwards to the putty layer 2, thereby avoiding the impact of cracks in the inner wall surface on the putty layer 2 and effectively reducing the occurrence of reflective cracks in the putty layer 2. Furthermore, the isolation layer 3 is made of a flexible sheet material with a thickness of ≤0.5mm, and it is only fixedly laid in the crack-prone area 11, rather than being laid on the entire interior wall surface. Compared with the existing technology of applying anti-crack mortar and laying fiberglass mesh on the entire interior wall surface, the anti-crack interior wall structure in this embodiment can significantly reduce the structural thickness and lighten the weight of the module box, thereby avoiding the burden of transportation and construction due to increased weight. At the same time, since the anti-crack interior wall structure in this embodiment only lays the isolation layer 3 in the crack-prone area 11, it can reduce the amount of construction work, improve construction efficiency, and significantly reduce the amount of construction materials used, further reducing construction costs. This ensures that the putty layer 2 is prevented from developing reflective cracks due to the effective blocking of crack transmission from the concrete base layer of the interior wall by the isolation layer 3, thereby further ensuring the flatness and decorative consistency of the interior wall surface.

[0039] Furthermore, the isolation layer 3 is made of alkali-resistant kraft paper or crack-resistant adhesive that has undergone waterproof impregnation treatment. It has good toughness, is not easily deformed or broken, and possesses excellent flexibility and tensile strength, thereby further enhancing the blocking effect against crack propagation. Moreover, the waterproof impregnation treatment of the isolation layer 3 enables it to form a waterproof barrier in the crack-prone area 11, effectively preventing moisture in the air from penetrating into the concrete base layer or putty layer 2. This improves the impermeability and durability of the isolation layer 3, thus preventing damage to the interior wall structure and softening and peeling of the putty layer 2 caused by moisture, further enhancing the stability and durability of the interior wall structure. The isolation layer 3 is preferably made of alkali-resistant kraft paper, which is cheaper than crack-resistant adhesive, resulting in lower construction costs. Furthermore, the alkali resistance of the alkali-resistant kraft paper is more adaptable to the environment of the interior wall 1, preventing performance degradation due to environmental factors during long-term use and extending the service life of the isolation layer 3.

[0040] It should be noted that when waterproofing the isolation layer 3 material, it is necessary to immerse the isolation layer 3 in the waterproofing agent for natural penetration, allowing the waterproofing agent to seep into the micropores or crevices of the isolation layer 3, thus giving the isolation layer 3 its waterproof function. The waterproofing agent can be a silane impregnating liquid; of course, other impregnating liquids can also be used, which will not be elaborated here. Simultaneously, the isolation layer 3 should be immersed in the waterproofing agent for 0.5 hours to 1 hour to ensure that the waterproofing agent fully penetrates into the micropores or crevices of the isolation layer 3.

[0041] Furthermore, such as Figures 3-5 As shown, the isolation layer 3 is adhered to the crack-prone area 11 by the adhesive layer 4. This ensures a firm bond between the isolation layer 3 and the crack-prone area 11, preventing displacement or lifting of the isolation layer 3 during the application of the putty layer 2. This ensures that the isolation layer 3 accurately covers the crack-prone area 11, guaranteeing the stability of its crack-resistant effect. The adhesive layer 4 can be wallpaper adhesive or rice glue, and its thickness is ≤0.5mm. This significantly reduces the overall thickness of the interior wall 1 and the overall weight of the modular box, making the modular box lighter.

[0042] When the release layer 3 is applied to the crack-prone area 11 of the interior wall using the adhesive layer 4, a scraper must be used to remove all air between the release layer 3 and the interior wall to ensure the release layer 3 is flat. Furthermore, after the release layer 3 is laid flat, masking tape is used to secure its edges to prevent displacement and ensure a smooth finish. Once the adhesive has hardened and the release layer 3 is firmly in place, the masking tape is removed.

[0043] Furthermore, such as Figures 3-5As shown, the isolation layer 3 is bonded to the putty layer 2 via the interface agent layer 5. The interface agent layer 5 effectively improves the interfacial compatibility between the isolation layer 3 and the putty layer 2, enhances their adhesion, and prevents peeling or hollowing between the putty layer 2 and the isolation layer 3, thus ensuring the integrity and stability of the interior wall decoration structure. Furthermore, the interface agent layer 5 ensures that the putty layer 2 firmly covers the isolation layer 3, improving the bonding strength between the putty layer 2 and the isolation layer 3, preventing the putty layer 2 from hollowing and falling off the surface of the isolation layer 3. This ensures that the isolation layer 3 continues to effectively block crack transmission, further enhancing the long-term reliability of the interior wall's crack resistance. The thickness of the interface agent layer 5 is between 0.1mm and 0.3mm.

[0044] The thickness of the putty layer 2 on the entire interior wall 1 is between 2mm and 3mm, and the putty layer 2 is a single flat surface. Therefore, the thickness of the putty layer with the isolation layer 3 needs to be reduced by the thickness of the adhesive layer 4, the isolation layer 3, and the interface agent layer 5.

[0045] Furthermore, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the crack-prone area 11 includes the joint area of ​​the interior wall 1 and the area around the junction box. For example... Figure 1 and Figure 2 As shown, for the joint area, the isolation layer 3 is fixedly laid in the joint area and extends along the length of the joint, covering the joint so that the isolation layer 3 can completely block the transmission of cracks at the joint. Figure 4 and Figure 5 As shown, for the area surrounding the junction box, the isolation layer 3 has pre-drilled holes for the junction box and is fixedly laid around it, so that the isolation layer 3 can completely block the conduction of cracks in the inner wall around the junction box. Moreover, it can also avoid interfering with the normal installation and use of the junction box.

[0046] It should be noted that the construction area of ​​isolation layer 3 is the inner wall surface extending outward from the joint area and the area around the junction box by 0.5m-1m.

[0047] The isolation layer 3 material needs to be cut before use. The cut isolation layer 3 material should be a single, integral piece to ensure its crack resistance and impermeability. It can also be cut into multiple pieces, with adjacent pieces overlapping and securely bonded with adhesive. However, overlapping is not recommended, as it reduces crack resistance and impermeability, affecting the overall crack protection effect. Of course, if overlapping is unavoidable due to the structure of the interior wall 1, the overlap width between adjacent isolation layer 3 pieces should be no less than 20mm to ensure the overall crack protection effect. The area to be overlapped should be pre-planned during cutting.

[0048] Example 2

[0049] like Figure 6 As shown, a construction method for forming a crack-resistant interior wall structure of the modular building in Embodiment 1, according to this embodiment, includes the following steps:

[0050] S1: Identify the crack-prone area 11 on the interior wall surface, and based on this, determine the size and area of ​​the isolation layer 3 to be laid in the crack-prone area 11, and cut it according to the determined size of the isolation layer 3. Of course, if there are defects such as honeycomb or pitted surface on the interior wall surface, it is necessary to repair and level it in advance using repair mortar.

[0051] S0: Immerse the cut isolation layer 3 in the silane impregnation agent for waterproof impregnation treatment, and the impregnation time is 0.5 hours to 1 hour. After the impregnation is completed, take out the isolation layer 3 and let it air dry naturally.

[0052] S2: Clean the interior wall surface of the crack-prone area 11 thoroughly, ensuring it is free of debris and dust. After the interior wall surface is dry, apply a waterproof and mildew-resistant adhesive to the crack-prone area 11, and then apply the adhesive to the bonding surface of the isolation layer 3 and the interior wall surface. The adhesive should be fully applied and the thickness should be ≤0.5mm. If the isolation layer 3 material needs to overlap, the adhesive should be applied to the overlap between two adjacent isolation layer 3 materials.

[0053] S3: Fix the determined isolation layer 3 onto the crack-prone area 11 coated with adhesive to ensure that the isolation layer 3 is laid flat.

[0054] S30: After laying the release layer 3 on the interior wall, use a plastic scraper to smooth the release layer 3, removing any air between the release layer 3 and the interior wall. Carefully check to ensure that the release layer 3 is adhered smoothly without any hollow spots. After adhesion, use masking tape to secure the edges of the release layer 3. Remove the masking tape after the adhesive has completely cured.

[0055] S31: Apply an interface agent to the surface of the isolation layer 3 away from the inner wall to increase the bonding strength between the putty layer 2 and the isolation layer 3, and prevent the putty layer 2 from blistering and falling off on the surface of the isolation layer 3.

[0056] S4: After the interface agent layer 5 dries, apply the putty layer 2 to the interior wall surface and cover it with the isolation layer 3. The thickness of the putty layer 2 on the interior wall surface without the isolation layer 3 is 2-3mm. The thickness of the putty layer with the isolation layer 3 needs to be reduced by the thickness of the adhesive layer 4, the thickness of the isolation layer 3, and the thickness of the interface agent layer 5, so that the putty layer 2 on the interior wall surface is flat, thus completing the interior wall putty construction.

[0057] Example 3

[0058] This embodiment is a specific implementation of the construction of the interior wall surface of the assembled concrete modular box-type interior wall 1 according to the construction method of Embodiment 2.

[0059] Inside the assembled concrete modular box-type interior, for the joint areas of the inner wall 1 and the area around the junction boxes, 0.3mm thick alkali-resistant kraft paper is selected as the isolation layer 3 material. The construction steps are as follows:

[0060] S1: The inner wall area extending 0.5m outward from the joint area and the area around the junction box is designated as the construction area for isolation layer 3. Repair mortar is used to repair and level any defects in the wall surface.

[0061] S2: Cut alkali-resistant kraft paper to the corresponding size according to the dimensions of the construction area, immerse it in silane impregnation solution, soak for 0.5 hours, then take it out and let it air dry naturally to complete the waterproofing treatment.

[0062] S3: After the wall repair mortar has hardened, clean the wall surface and allow it to dry completely. Then, use waterproof and mildew-resistant wallpaper paste to adhere the waterproof-treated alkali-resistant kraft paper. Use a trowel to smooth the paste and remove any air bubbles. After pasting, use masking tape to secure the edges of the alkali-resistant kraft paper.

[0063] S4: After the wallpaper adhesive has fully cured in about 24 hours, remove the masking tape to complete the construction of the isolation layer 3.

[0064] S5: Then apply a cement-based two-component interface agent to the surface of the isolation layer 3;

[0065] S6: After the interface agent layer 5 has hardened and dried, apply the putty to complete the interior wall putty construction.

[0066] After three months of long-term observation of the treated interior wall surface, no cracking or peeling of putty layer 2 was observed, indicating that the construction method can effectively reduce the occurrence of reflective cracks in putty layer 2.

[0067] Example 4

[0068] Simulation experiments were conducted on Examples 1 to 3. Mechanical performance specimens were prepared for the putty structure of the interior wall surface. The specimens were cuboids with a length of 400 mm, a width of 100 mm, and a thickness of 50 mm. Four-point bending mechanical tests were performed on them. Figure 7 As shown, when the specimen is subjected to a force of 7kN-9kN and the crack width is between 0.5mm-1mm, no corresponding reflective cracks appear in putty layer 2. Therefore, it can be concluded that the internal wall crack-resistant structure of Example 1 and the construction methods of Examples 2 and 3 can effectively prevent reflective cracks from appearing in putty layer 2, and putty layer 2 has good crack resistance.

[0069] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A crack-resistant interior wall structure for modular buildings, characterized in that, Includes interior wall (1), putty layer (2) and isolation layer (3); The inner wall surface of the inner wall (1) is provided with a crack-prone area (11). The isolation layer (3) is a flexible sheet material with a thickness of ≤0.5mm, and the isolation layer (3) is only fixedly laid on the crack-prone area (11) and covers the crack-prone area (11). The putty layer (2) is applied to the inner wall surface and covers the isolation layer (3).

2. The crack-resistant interior wall structure of the modular building as described in claim 1, characterized in that: The isolation layer (3) is alkali-resistant kraft paper or crack-resistant tape that has been waterproofed and impregnated.

3. The crack-resistant interior wall structure of the modular building as described in claim 1, characterized in that: The isolation layer (3) is attached to the crack-prone area (11) by an adhesive layer (4); The thickness of the adhesive layer (4) is ≤0.5mm.

4. The crack-resistant interior wall structure of the modular building as described in claim 1, characterized in that: The isolation layer (3) is bonded to the putty layer (2) through the interface agent layer (5).

5. The crack-resistant interior wall structure of the modular building as described in claim 1, characterized in that: The crack-prone area (11) includes the joint area of ​​the inner wall (1) and the area around the junction box; For the seam area, the isolation layer (3) is fixedly laid in the seam area and extends along the length of the seam to cover the seam; For the area around the junction box, the isolation layer (3) has reserved through holes for the junction box and is fixedly laid around the junction box.

6. A construction method for forming a crack-resistant interior wall structure for a modular building according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Determine the crack-prone area (11) of the inner wall surface, and thereby determine the size and area of ​​the isolation layer (3) applied to the crack-prone area (11); S2: Apply adhesive to the crack-prone area (11); S3: The determined isolation layer (3) is fixedly laid on the crack-prone area (11) coated with the adhesive. S4: Apply the putty layer (2) to the inner wall surface and cover the isolation layer (3).

7. The construction method for forming a crack-resistant interior wall structure as described in claim 6, characterized in that: Before step S2, step S0 is also included, which involves waterproofing the isolation layer (3).

8. The construction method for forming a crack-resistant interior wall structure as described in claim 7, characterized in that: Step S0 is: immerse the isolation layer (3) in silane impregnation agent for 0.5 hours to 1 hour, and after the impregnation is completed, take out the isolation layer (3) and let it dry.

9. The construction method for forming a crack-resistant interior wall structure as described in claim 7, characterized in that: Before step S4, there is also step S31, which specifically involves applying an interface agent to the surface of the isolation layer (3) away from the inner wall.

10. The construction method for forming a crack-resistant interior wall structure as described in claim 9, characterized in that: Before step S31, there is also step S30. Step S30 specifically involves laying the isolation layer (3) on the inner wall surface, then using a plastic scraper to smooth the isolation layer (3) and expel the air between the isolation layer (3) and the inner wall surface.

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