Waterproof structure at house junction and construction method

Abstract

The present invention relates to a waterproof structure at the junction of houses and a construction method, comprising an upper sealing body, a lower sealing body and a protective body; the lower sealing body comprises a lower main body, a lower sealing plate and a holder; a lower sealing plate extending downward is provided on one side of the lower part of the lower main body, and an assembly step is provided on the other side of the upper part of the lower main body; the holder is provided on the upper part of the lower main body; the upper sealing body comprises an upper main body, a card plate and a clamping head; a card plate protruding outward is provided on one side of the upper main body, a clamping head is provided on the lower part of the upper main body, and the clamping head is adapted to the clamping head; the protective body comprises a lower protective plate and a side protective plate, the lower protective plate is connected to the side protective plate, bolts are applied in the mounting holes and through holes, and the upper sealing body, the lower sealing body and the protective body are combined and fixed on the wall. The present invention is configured with an upper sealing body and a lower sealing body structure, and the structural stability is achieved by using the card plate and the inner card slot structure, which has shown significant beneficial effects in improving waterproof performance, stability, adaptability, construction convenience and maintainability.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a waterproof structure at a junction of houses and a construction method thereof. Background Art

[0002] Building junctions are often prone to water seepage due to differences in materials and the presence of construction joints. This occurs primarily due to differences in the physical and chemical properties of different materials, which can lead to stress concentrations and cracks at these junctions, causing water seepage problems.

[0003] Waterproofing is an issue that requires special attention during house construction. Current waterproof structures generally use waterproof membranes for waterproofing, but the current waterproof membranes are generally adhered to the walls, which have poor stability and are prone to gaps, leading to water seepage.

[0004] Especially in the process of roof treatment, waterproofing the expansion joints is quite difficult. The current method is to use a combination of galvanized iron sheets and waterproof membranes. As one of the mainstream materials in the current field of building waterproofing, waterproof membranes have the main advantages of convenient construction, relatively low cost and certain waterproofing effect. However, their limitations are also obvious:

[0005] Insufficient Adhesion: Traditional waterproofing membranes rely on adhesives to bond to the substrate (e.g., walls, roofs, etc.). However, the substrate's material, surface condition, and environmental conditions can affect adhesion, leading to delamination or hollowing between the membrane and the substrate, which in turn creates seepage channels.

[0006] Durability Challenge: Over time, waterproof membranes are susceptible to environmental factors such as ultraviolet radiation, temperature changes, and humidity fluctuations, causing them to age, become brittle, and even break, thereby reducing their waterproof performance.

[0007] Construction difficulty: During the construction of complex structures or special-shaped parts (such as roof expansion joints, wall corners, etc.), the laying and fixing of waterproof membranes are particularly difficult, and wrinkles and loose overlaps are prone to occur, affecting the waterproof effect.

[0008] However, this construction method has the disadvantages that the protective iron sheet is poor in stability, easily falls off, and easily forms gaps, leading to water seepage, and cannot meet people's needs.

[0009] Galvanized iron sheets are often used to treat waterproof joints such as roof expansion joints due to their good corrosion resistance and certain strength. However, in actual applications, their shortcomings have gradually become apparent:

[0010] Poor stability: The fixation of galvanized iron sheets usually relies on mechanical fasteners such as screws and rivets. These fasteners are easily loosened by external forces during long-term use, causing the iron sheets to fall off or deform.

[0011] Gap problem: There are often gaps between the galvanized iron sheet and the waterproof membrane and base layer that are difficult to completely eliminate. These gaps are easily expanded under the influence of rainwater penetration, temperature changes, etc., and become water seepage channels.

[0012] Therefore, the current waterproof structure has the problems of poor stability and insufficient durability, which leads to water seepage at the connection points of building structures. Based on this, it is necessary to study a waterproof structure and construction method for the junction of buildings. Summary of the Invention

[0013] In view of this, the purpose of the present invention is to provide a waterproof structure and construction method for the junction of houses, which effectively solves the problem that the existing waterproof structure has poor stability and insufficient durability, which in turn leads to water seepage at the connection points of house buildings.

[0014] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a waterproof structure at the junction of a house, comprising an upper sealing body, a lower sealing body and a protective body; the lower sealing body comprises a lower main body, a lower sealing plate and a holder; a lower sealing plate extending downward is provided on one side of the lower part of the lower main body, and an assembly step is provided on the other side of the upper part of the lower main body; the holder is provided on the upper part of the lower main body and is located on one side of the lower sealing plate; the upper sealing body comprises an upper main body, a card plate and a card head; a card plate protruding outward is provided on one side of the upper main body, a card head is provided at the lower part of the card head, and the card head is adapted to the card seat, and a mounting hole passing through the upper main body and the card plate is provided on the upper main body; the protective body comprises a lower protective plate and a side protective plate, the lower protective plate is connected to the side protective plate, and after the lower sealing body and the upper sealing body are spliced, an installation area adapted to the protective body is formed, and a through hole corresponding to the mounting hole is provided on the side protective plate, and bolts are applied in the mounting hole and the through hole to fix the upper sealing body, the lower sealing body and the protective body combination on the wall.

[0015] Furthermore, it also includes a sealing structure, which includes an inner sealing body and an outer sealing body. The inner sealing body is arranged on the lower sealing plate and extends upward to the card plate; the outer sealing body is arranged between the protective body and the installation area.

[0016] Furthermore, a baffle is provided on the upper part of the upper body, and an upper sealing plate is provided on the upper part of the side protective plate. The upper sealing plate is adapted to be inserted into the upper sealing area formed by the baffle and the upper body, and the upper part of the outer sealing body extends into the upper sealing area.

[0017] Furthermore, a sealing groove and a sealing head are provided between the baffle and the upper sealing plate; the sealing head is adapted to be assembled in the sealing groove.

[0018] Furthermore, a slope is provided on the outer side of the lower body, and the outer sealing body extends outward along the slope.

[0019] Furthermore, the side protection plates and the upper body are respectively provided with corresponding ribs and rib grooves.

[0020] Furthermore, an upwardly inclined supporting plate is provided on the outer side of the side protective plate.

[0021] Furthermore, the side protective plate and the lower protective plate are combined into an L-shaped structure. When the lower sealing body and the upper sealing body are in the spliced ​​state, the outer side of the upper sealing body is flush with the assembly step and forms an L-shaped installation area, so that after the protective plate is compressed by the bolts, it simultaneously applies an inward force to the upper sealing body and the lower sealing body.

[0022] Furthermore, the lower protective plate has a guide surface that gradually slopes from inside to outside and from top to bottom.

[0023] A construction method for a waterproof structure at a junction of houses, applied to the above-mentioned waterproof structure at a junction of houses, comprises the following steps:

[0024] Step 1: construct a horizontal groove downward on the horizontal wall, and then construct a leveling layer in the horizontal groove;

[0025] Step 2: construct a vertical groove inward on the vertical wall, and then construct an inner groove in the vertical groove;

[0026] Step 3: Pre-install the inner sealing body on the lower sealing body, fit the lower sealing body adapter into the expansion joint, and fit the upper part of the inner sealing body onto the vertical wall and into the inner slot;

[0027] Step 4: Fit the upper sealing body and the lower sealing body together so that the card plate is inserted into the inner card slot and the upper end of the inner sealing body is inserted into the inner card slot;

[0028] Step 5: construct an outer sealing body on the outer sides of the upper sealing body and the lower sealing body, and then arrange the protective body outside the outer sealing body;

[0029] Step 6: Use bolts to fix the protective body and the upper sealing body in the slot;

[0030] Step seven: construct the surface layer on the upper part of the leveling layer and construct the decorative layer on the vertical wall.

[0031] The beneficial effects of the above technical solution are: the present invention mainly provides a waterproof structure at the junction of a house and a construction method thereof, wherein the structure is configured with an upper sealing body and a lower sealing body structure, the combination of which performs targeted sealing on the deformation joint, and at the same time utilizes the clamping plate and the inner card groove structure to achieve structural stability, on the basis of ensuring the stability of the sealing body, improving the connection tightness of the combined structure wall, adopting a combined connection structure, and assembling as a whole with the help of bolts, while ensuring tight assembly, ensuring the tight construction of the sealing gasket.

[0032] The specific beneficial effects are as follows:

[0033] Enhanced waterproof performance:

[0034] The structural design forms a multi-layer waterproof barrier through the combination of the upper sealing body, the lower sealing body and the protective body. In particular, the configuration of the inner and outer sealing bodies further enhances the waterproof effect and effectively prevents water penetration.

[0035] The coordinated use of the sealing groove and the sealing head enhances the sealing between the panels and reduces the risk of water seepage.

[0036] Improve stability:

[0037] The design of the base and the clamping head, as well as the tightening effect of the bolts, enable the upper sealing body, the lower sealing body and the protective body to be firmly fixed on the wall, thereby enhancing the stability of the overall structure.

[0038] The protective body is designed as an L-shaped structure, which fits tightly with the installation area formed by the upper and lower sealing bodies. When the bolts are tightened, the protective plate will exert an inward force on the upper and lower sealing bodies, further enhancing the stability of the structure.

[0039] Strong adaptability:

[0040] The slope design enables the outer sealing body to extend outward along the slope, thereby enhancing the adaptability of the waterproof structure. In particular, when the wall surface is uneven or has slight deformations, it can still maintain a good waterproof effect.

[0041] The coordinated use of ribs and rib grooves improves the matching accuracy and stability between structures and enhances the waterproof performance.

[0042] Convenient construction:

[0043] The construction steps are clear and easy for construction workers to operate. In particular, after the pre-processing steps such as horizontal grooves, vertical grooves, leveling layers, and internal card grooves are completed, the subsequent waterproof structure installation work can proceed more smoothly.

[0044] The protective body is designed as an L-shaped structure, which closely matches the installation area formed by the upper sealing body and the lower sealing body, reducing the workload of on-site adjustments and improving construction efficiency.

[0045] Aesthetics and functionality:

[0046] The design of the shield not only takes waterproofing into account, but also aesthetics. In particular, the arrangement of the support plate and the diversion surface ensures that the shield not only has waterproofing functions, but also serves a certain decorative and diversion function, facilitating the construction of the vertical wall decoration layer.

[0047] The upper sealing plate is adapted to be inserted into the upper sealing area formed by the baffle and the upper body, making the entire waterproof structure more neat and beautiful in appearance.

[0048] Durability and maintainability:

[0049] The waterproof structure adopts a multi-layer design, and the materials of each layer are closely matched to enhance the durability of the structure. Even if some materials become aged or damaged during long-term use, they can be easily replaced or repaired.

[0050] In summary, this waterproof structure at the junction of houses and its construction method have shown significant beneficial effects in improving waterproof performance, stability, adaptability, construction convenience, balance between aesthetics and functionality, as well as durability and maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Schematic diagram of the implementation structure of the present invention;

[0052] Figure 2 Schematic diagram of the combined structure of the upper sealing body and the lower sealing body;

[0053] Figure 3 It is a schematic diagram of the outer front view of the upper sealing body and the lower sealing body;

[0054] Figure 4 It is a schematic side view of the structure of the upper sealing body and the lower sealing body in the combined state;

[0055] Figure 5 Schematic diagram of the three-dimensional structure of the lower sealing body;

[0056] Figure 6 This is a structural schematic diagram of the lower sealing body from another perspective;

[0057] Figure 7 Schematic diagram of the front structure of the lower sealing body;

[0058] Figure 8 Schematic diagram of the implementation structure of the upper sealing body;

[0059] Figure 9 It is a schematic diagram of the front structure of the upper sealing body.

[0060] Figure markings: 1-vertical wall, 2-horizontal wall, 3-deformation joint, 4-insulation layer, 5-leveling layer, 6-lower sealing body, 61-lower main body, 62-lower sealing plate, 63-base, 64-assembly step, 7-upper sealing body, 71-upper main body, 72-clamping plate, 73-clamping head, 74-mounting hole, 8-protective body, 81-guide surface, 82-support plate, 9-inner sealing body, 10-outer sealing body, 11-bolt, 12-stop, 13-sealing groove, 14-sealing head, 15-decorative surface layer, 16-surface layer. DETAILED DESCRIPTION

[0061] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0062] Example 1. This example aims to provide a waterproof structure and construction method for the junction of houses, which is mainly used to waterproof and seal the structure at the junction of houses. The current waterproof structure here generally adopts a combination structure of galvanized iron sheets and waterproof membranes, uses waterproof membranes to establish waterproof properties, and uses galvanized iron sheets for external protection. However, this structure has poor stability and insufficient durability, which leads to the problem of water seepage at the connection points of house buildings. Based on this, this example provides a waterproof structure for the junction of houses based on the structural characteristics of this structure.

[0063] like Figure 2-9 As shown in the figure, a waterproof structure for the junction of houses includes an upper sealing body 7, a lower sealing body 6 and a protective body 8; the sealing body structure is not involved in this embodiment, and the waterproof combination structure is mainly described; the structure combines the upper sealing body 7 and the lower sealing body 6 to carry out targeted sealing of the deformation joint, and at the same time uses the card plate and the inner card groove structure to achieve structural stability. On the basis of meeting the stability of the sealing body, the connection tightness of the wall of the combined structure is improved, and a combined connection structure is adopted, which is assembled as a whole with the help of bolts. While meeting the tight assembly, the construction tightness of the sealing gasket is ensured.

[0064] In specific implementation, the lower sealing body 6 includes a lower main body 61, a lower sealing plate 62 and a holder 63; a lower sealing plate 62 extending downward is provided on one side of the lower main body 61, and the lower sealing plate 62 is flush with one side of the lower main body 61, and an assembly step 64 is provided on the other side of the upper part of the lower main body 61; the holder 63 is provided on the upper part of the lower main body 61 and is located on one side of the lower sealing plate 62; in implementation, the lower sealing body 6 has three functional bodies; a lower sealing plate 62 extending downward, an outward-facing holder 63 and a horizontal assembly step 64 located below the holder, wherein the lower sealing plate 62 is used to be inserted into the deformation joint 3, and the main body part is tightly attached between the vertical wall 1 and the horizontal wall 2, and the holder structure is used to be connected to the upper sealing body 7 and to achieve its own stability under the pressure of the upper sealing body 7; the assembly step is used to cooperate with the protective body 8 so that the protective body 8 can apply a tightening force from the outside as a whole, so that the lower sealing body 6, the upper sealing body 7 and the protective body 8 are combined together.

[0065] The upper sealing body 7 includes an upper main body 71, a card plate 72 and a card head 73; a card plate 72 protruding outward is provided on one side of the upper main body 71, and a card head 73 is provided at the lower part thereof, and the card head 73 is adapted to the card seat 63, and a mounting hole 74 is provided on the upper main body 71 that passes through the upper main body and the card plate; in this embodiment, the inner part of the lower main body is provided with a card plate protruding outward, and the card plate structure is a square structure, and the lower part has a card head with an inward opening, which is adapted to be mounted in the card seat of the lower sealing body 6.

[0066] The protective body 8 includes a lower protective plate and side protective plates. The lower protective plate is connected to the side protective plates. After the lower sealing body 6 and the upper sealing body 7 are spliced, an installation area adapted to the protective body 8 is formed. Through holes corresponding to the installation holes are provided on the side protective plates. Bolts 11 are applied in the installation holes and the through holes to fix the upper sealing body 7, the lower sealing body 6 and the protective body 8 together on the wall.

[0067] The side protective plate and the lower protective plate are combined into an L-shaped structure. When the lower sealing body 6 and the upper sealing body 7 are in the spliced ​​state, the outer side of the upper sealing body 7 is flush with the assembly step and forms an L-shaped installation area, so that after the protective plate is pressed by the bolts, it simultaneously applies an inward force to the upper sealing body 7 and the lower sealing body 6.

[0068] The outer sides of the side guards are equipped with upward-sloping support plates 82. This structure facilitates the construction of the decorative surface, creating a natural support from the bottom, improving construction efficiency, and forming an outward-expanding diversion body. Simultaneously, the lower guard features a diversion surface 81 that gradually slopes from inside to outside and from top to bottom, preventing rainwater from accumulating in the root area.

[0069] The present embodiment includes three main bodies on the structural body, namely, an upper sealing body 7, a lower sealing body 6 and a protective body 8, wherein the lower sealing body 6 is at the lower part and has a lower sealing plate. The upper sealing body 7 and the lower sealing body 6 have a mutual clamping relationship and a clamping plate is formed on their sides. The protective body 8 is used to protect the combined state of the upper sealing body 7 and the lower sealing body 6 from the outside, and bolts are uniformly applied to stabilize the combined structure from the outside. This structure is used to seal a main structure with vertical walls, horizontal walls and deformation joints. The structure is constructed through assembly, and the construction steps are simple. The combined assembly of the structure and the fixed connection with the wall can be achieved by a bolt, and the structures are tightly matched to facilitate disassembly and maintenance.

[0070] Example 2: This example is aimed at the structure in Example 1 and further describes it in detail in combination with the sealing body according to the construction environment.

[0071] This embodiment includes a sealing structure, which includes an inner sealing body 9 and an outer sealing body 10. The inner sealing body 9 and the outer sealing body 10 can be made of waterproof materials during implementation. The inner sealing body 9 is arranged on the lower sealing plate 62 and extends upward to the card plate; the outer sealing body 10 is arranged between the protective body 8 and the installation area. This embodiment adopts double-layer sealing to ensure the sealing effect, and at the same time uses the lower sealing body to extend horizontally in the low water level to ensure the overall waterproof effect.

[0072] In order to further ensure the sealing effect, a baffle 12 is provided on the upper part of the upper main body, and an upper sealing plate is provided on the upper part of the side protective plate. The upper sealing plate is adapted to be inserted into the upper sealing area formed by the baffle and the upper main body, and the upper part of the outer sealing body 10 extends into the upper sealing area; a sealing groove 13 and a sealing head 14 are provided between the baffle and the upper sealing plate; the sealing head 14 is adapted to be assembled in the sealing groove 13.

[0073] To further facilitate the construction of the outer seal 10, a slope is provided on the outer side of the lower body, along which the outer seal 10 extends outward. The side guards and upper body are each provided with corresponding ribs and rib grooves, which form multiple sealing structures between the side guards and the upper body.

[0074] This embodiment forms a multi-layer waterproof barrier by combining the upper sealing body 7, the lower sealing body 6 and the protective body 8. In particular, the arrangement of the inner sealing body 9 and the outer sealing body 10 further enhances the waterproof effect and effectively prevents water penetration.

[0075] Example 3: This example further illustrates the construction method for the structure in Example 2 according to the construction environment.

[0076] The present embodiment provides a construction method for a waterproof structure at a junction of houses, which is applied to the above-mentioned waterproof structure at a junction of houses and includes the following steps:

[0077] Step 1: Construct a horizontal groove downward on the horizontal wall, and then construct a leveling layer in the horizontal groove to provide a flat foundation for the subsequent installation of the waterproof layer;

[0078] Step 2: construct a vertical groove inward on the vertical wall, and then construct an inner groove in the vertical groove;

[0079] Step 3: Pre-install the inner sealing body 9 on the lower sealing body 6, fit the lower sealing body 6 into the expansion joint, and fit the upper part of the inner sealing body 9 onto the vertical wall and into the inner slot;

[0080] Step 4: Fit the upper sealing body 7 and the lower sealing body 6 together so that the card plate is correspondingly inserted into the inner card slot and the upper end of the inner sealing body 9 is built into the inner card slot;

[0081] Step 5: Build an outer seal 10 outside the upper and lower seals 7 and 6, then place the protective body 8 outside of the outer seal 10. This outer protective body 8 is constructed outside the upper and lower seals 7 and 6, forming a second waterproof barrier. Place the protective body 8 outside the outer seal 10 and secure it to the upper seal 7 and the slots with bolts to ensure the stability of the overall structure.

[0082] Step 6: Use bolts to fix the protective body 8 and the upper sealing body 7 in the slot;

[0083] Step 7: Build the surface layer on top of the leveling layer and the decorative layer on the vertical walls. The surface layer is built on top of the leveling layer to restore the wall's smoothness and aesthetics. The decorative layer on the vertical walls harmonizes with the overall architectural style. The construction of the surface and decorative layers further enhances the overall visual effect of the wall and harmonizes with the surrounding environment.

[0084] This embodiment significantly improves the waterproofing performance of the building interface by stacking multiple layers of waterproof structures (inner seal 9, outer seal 10, protective body 8, etc.), effectively preventing water penetration. The upper and lower seals 6 are connected by clamping plates and inner slots, and fastened with bolts, making the overall structure stable and reliable, and not prone to loosening or falling off. The construction steps are clear and well-defined, and each step is closely linked, facilitating rapid mastery and efficient execution by construction personnel.

[0085] The use of prefabricated components (such as the inner seal 9 and the lower seal 6) reduces on-site processing workload and improves construction efficiency. This construction method is applicable to different types of building junctions (such as expansion joints and settlement joints) and has strong versatility and adaptability.

[0086] The design of the protective body 8 not only considers waterproof performance but also aesthetics, resulting in a cleaner and more aesthetically pleasing waterproof structure. The multi-layered waterproof structure enhances the durability of the waterproof system, maintaining excellent waterproofing even during long-term use. The upper and lower sealing bodies 7 and 6 are completely removable, allowing for repairs or replacement of only part of the waterproof material, reducing maintenance costs.

[0087] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to configure an upper sealing body 7 and a lower sealing body 6 structure, which are combined to carry out targeted sealing of the deformation joint, and at the same time, the structure is stabilized by using a card plate and an inner card slot structure. On the basis of ensuring the stability of the sealing body, the connection tightness of the combined structure wall is improved, and a combined connection structure is adopted, which is assembled as a whole with the help of bolts, ensuring the tightness of the construction of the sealing gasket while meeting the tight assembly. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A waterproof structure for the junction of houses, characterized by: The lockhole that is formed on the upper part of the lifting block is formed on the upper part of the lifting block, and the lockhole that is formed on the lower part of the lifting block is formed. It also includes a sealing structure, the sealing structure includes an inner sealing body and an outer sealing body, the inner sealing body is configured on the lower sealing plate and extends upward to the card plate; the outer sealing body is configured between the protective body and the installation area; A baffle is provided on the upper portion of the upper body, an upper sealing plate is provided on the upper portion of the side protection plate, the upper sealing plate is adapted to be inserted into an upper sealing area formed by the baffle and the upper body, and the upper portion of the outer sealing body extends into the upper sealing area; A sealing groove and a sealing head are provided between the baffle and the upper sealing plate; the sealing head is adapted to be assembled in the sealing groove; The side protective plate and the lower protective plate are combined into an L-shaped structure. When the lower sealing body and the upper sealing body are in the spliced ​​state, the outer side of the upper sealing body is flush with the assembly step, and an L-shaped installation area is formed, so that after the protective plate is compressed by the bolts, it simultaneously applies an inward force to the upper sealing body and the lower sealing body.

2. The waterproof structure for house junctions according to claim 1, characterized in that: The outer side of the lower body is provided with a slope, and the outer sealing body extends outward along the slope.

3. The waterproof structure for house junctions according to claim 1, characterized in that: The side protection plates and the upper body are respectively provided with corresponding ribs and rib grooves.

4. The waterproof structure for house junctions according to claim 1, characterized in that: An upwardly inclined supporting plate is provided on the outer side of the side protection plate.

5. The waterproof structure for house junctions according to claim 1, characterized in that: The lower protective plate has a guide surface which is gradually inclined from inside to outside and from top to bottom.

6. A construction method for a waterproof structure at a junction of houses, applied to the waterproof structure at a junction of houses according to any one of claims 1 to 5, characterized in that: The method includes the following steps: Step 1: construct a horizontal groove downward on the horizontal wall, and then construct a leveling layer in the horizontal groove; Step 2: construct a vertical groove inward on the vertical wall, and then construct an inner groove in the vertical groove; Step 3: Pre-install the inner sealing body on the lower sealing body, fit the lower sealing body adapter into the expansion joint, and fit the upper part of the inner sealing body onto the vertical wall and into the inner slot; Step 4: Fit the upper sealing body and the lower sealing body together so that the card plate is inserted into the inner card slot and the upper end of the inner sealing body is inserted into the inner card slot; Step 5: construct an outer sealing body on the outer sides of the upper sealing body and the lower sealing body, and then arrange the protective body outside the outer sealing body; Step 6: Use bolts to fix the protective body and the upper sealing body in the slot; Step seven: construct the surface layer on the upper part of the leveling layer and construct the decorative layer on the vertical wall.

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