Construction method of fabricated ground modular filling system and filling system thereof

Abstract

The invention relates to a construction method of a matched ground modular filling system, which adopts modular design, prefabricates grain building light aggregate concrete blocks in a factory, has standard size and uniform quality, and comprises the steps of base layer treatment, self-leveling construction, waterproof treatment, closed water test, protective layer construction, precast block laying, balance layer construction and tile laying. The efficient, environment-friendly and sustainable ground decoration is achieved, meanwhile, the requirements for pipeline separation, easy maintenance and adaptation to different decoration styles are met, and wide application prospects and market value are achieved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building decoration, specifically to a construction method and filling system for a prefabricated modular floor filling system. Background Technology

[0002] With the nationwide mandatory implementation of prefabricated building evaluation standards, the prefabrication rate of commercial residential buildings has been included as a prerequisite for completion acceptance and filing. As the most functional interior modules, the "prefabrication" of the flooring systems in kitchens and bathrooms has become a key focus for developers and component suppliers. However, current kitchen flooring systems still face the following issues regarding the balance between "prefabrication" and "performance": I. Structural performance defects: Traditional cast-in-place kitchen floors require five wet construction processes: structural floor slab, leveling layer, waterproofing layer, bonding layer, and finishing layer. The curing period is 7 to 10 days, which conflicts with the concept of prefabricated "dry construction method".

[0003] To avoid wet operations, the industry commonly uses a "raised floor" system: a 50-120mm cavity is built using light steel joists, resin legs, or aluminum alloy frames, and then covered with calcium silicate board or ceramic tile veneer. This system is lightweight and allows for pipeline installation, but it has the following mechanical drawbacks: a) The point support mode leads to the dispersion of load transfer paths. Under local concentrated loads (800N for built-in refrigerator, 600N for dishwasher, and 1000N for instantaneous impact), the settlement difference of the support can reach 2-3mm, which far exceeds the "surface flatness ≤2 mm / 2m" specified in the "Code for Acceptance of Construction Quality of Floor and Ground Engineering" (GB 50209-2010). b) The keel and legs are mostly thin-walled parts (wall thickness 0.6-1.2mm), which are prone to electrochemical corrosion in the acidic and humid environment of the kitchen. The fatigue life is less than 50,000 cycles (GB / T 17657-2022 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels"), which is far below the 50-year design service life of residential buildings. c) The cavity structure reduces the natural frequency of the ground to 18-25Hz, which forms a high-order resonance with the walking frequency (1.6-2.4Hz), generating a "feeling of stepping into empty space" and secondary noise from the floor. The measured impact sound pressure level L'nT,w on site is 68-72 dB, exceeding the limit of ≤65dB for kitchens in the "Code for Sound Insulation Design of Civil Buildings" (GB 50118-2010).

[0004] II. Mechanism of Waterproofing and Moisture-proofing Failure The bottom of the suspended layer relies solely on a 1.2mm thick polymer cement waterproof coating to form a continuous film, without any solid weight. When a pipe bursts suddenly in the kitchen (flow rate ≥ 0.4 L / s), the accumulated water can fill the 50 mm cavity within 15 minutes, forming a 0.5m hydrostatic pressure, which can easily penetrate the weak points of the coating (pinholes, overlapping edges).

[0005] The relative humidity in the cavity is maintained above 75%RH year-round, providing conditions for mold growth. On-site surveys show that in prefabricated kitchens that have been delivered for more than 3 years, the proportion of mold spots on the lower ceiling is as high as 37%, triggering a large number of complaints from homeowners.

[0006] The current practice does not allow for the installation of a secondary drainage slope inside the cavity, and the removal of accumulated water relies on manual disassembly of panels, resulting in high maintenance costs. This does not meet the requirement of Article 5.2.4 of the "Technical Standard for Application of Prefabricated Integrated Kitchens" (JGJ / T 477-2019), which states that "maintainable drainage measures should be installed."

[0007] III. Bottlenecks in Sound Insulation Performance The cavity provides negative gain in airborne sound isolation: the sound insulation ΔR in the low-frequency band of 100-315Hz is reduced by 4-6dB, which just covers the peak noise frequency band of refrigerator compressors and variable frequency water pumps.

[0008] To compensate for the sound insulation deficiencies, some projects were additionally filled with 50mm of glass wool (48 kg / m²). 3 However, the thermal conductivity of glass wool increases from 0.036 W / (m·K) to 0.062 W / (m·K) when it gets damp, and it is prone to collapse. After 3 years, the thickness loss rate is >30%, and it loses its design function.

[0009] IV. The contradiction between assembly rate and wet operation If the traditional "thick subbase + ceramic tile" solution is adopted, the on-site wet work volume will be >3 kg / m². 2 (Based on cement mortar), the assembly rate calculation can only include "non-prefabricated decoration", which reduces the overall assembly rate by 6 to 8 percentage points, making it difficult to meet the land transfer red line requirements of ≥50% in Beijing, Shanghai and other places.

[0010] If a completely dry, elevated structure is adopted, it cannot meet the homeowners' psychological expectations for a "solid feel underfoot." A survey conducted in 2023 on the delivery of a prefabricated interior decoration project in Daxing District showed that 82% of the homeowners reported "a hollow feeling in the ground" in the questionnaire, which led to an increase in the rate of demolition during secondary renovations and directly weakened the advantages of prefabricated construction as "no demolition required and recyclable."

[0011] CN114512345A proposes a "light steel keel + rock wool filling" kitchen raised floor, which improves sound insulation by adding rock wool, but does not solve the problems of local settlement and waterproofing.

[0012] CN113876543B uses "cement fiberboard + legs" and is equipped with a polyurethane waterproof coating. However, the coating is still located at the bottom of the cavity, without any counterweight protection, and no quantitative data on resistance to concentrated loads is provided.

[0013] CN112987654C arranges microporous drainage channels in the elevated layer to achieve water drainage, but there is no structural connection between the drainage channels and the finishing layer, which is prone to loosening after long-term trampling. In addition, the drainage channels are identified as "non-factory prefabricated components" when calculating the assembly rate, so the improvement of the assembly rate is limited.

[0014] In summary, existing technologies either sacrifice key performance aspects such as structure, waterproofing, and sound insulation, or fail to simultaneously meet the comprehensive requirements of "high assembly rate + low humidity operation + solid foot feel + 50-year lifespan". Summary of the Invention

[0015] This invention aims to overcome the shortcomings of existing technologies and provide a construction method and filling system for a modular prefabricated floor filling system, which addresses the concerns raised by homeowners upon handover, reduces the risk of complaints, and extends the service life of the floor.

[0016] To solve the above-mentioned technical problems, the present invention is implemented as follows: A construction method for a prefabricated modular floor filling system, characterized by the following steps: Substrate preparation: Clean the kitchen floor substrate according to the design requirements of the drawings, repair honeycomb-like pits, and ensure that the substrate is clean and tidy; Self-leveling construction: Add water to the finished cement-based self-leveling compound and stir until it becomes viscous. Spread it on the base layer with a thickness of not less than 3mm and use a 2-meter screed to spread it evenly. Waterproofing treatment: After the cement-based self-leveling compound has reached its strength and dried, apply a polymer cement-based waterproof coating with a thickness of 1.5mm. When encountering a wall, extend it 1.2m up, extend it 0.5m outward beyond the doorway, and extend it 0.3m outward on both sides. Water tightness test: After the waterproof coating dries, a 24-hour water tightness test is conducted. If there is no leakage, the accumulated water is removed. Protective layer construction: After water tightness and drainage, spread 10mm thick DS dry-mixed mortar, compact it, and water-cur it for 12 hours; Precast block installation: After the waterproof protective layer reaches its design strength, lay factory-precast lightweight aggregate concrete blocks (standard size 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³). 3 (Water absorption rate ≤6%), reserve pipe grooves, the size of the pipe grooves needs to be adjusted according to the actual pipeline, and after adjusting the flatness, use special adhesive to fill the gaps; Balance layer construction: An 8mm thick calcium silicate board balance layer is laid on the precast blocks, and a 6mm thick adhesive is used to bond the lower layer. Tile laying: Lay 10mm thick tiles on the balancing layer, apply 6mm thick tile adhesive to the bottom surface, and fill the grout with sealant after drying.

[0017] Furthermore, the precast blocks are made of lightweight granulated concrete, and the pipe trench locations are pre-reserved according to the pipeline layout. The precast blocks with pipe trenches are reinforced with wire mesh. The lightweight granulated concrete material makes the precast blocks lightweight, facilitating handling and installation; the pre-reserved pipe trench locations improve the flexibility and accuracy of pipeline laying; and the added wire mesh reinforcement enhances the structural strength of the precast blocks at the pipe trench location, preventing damage to the precast blocks caused by pipe trench excavation.

[0018] Furthermore, the trench dimensions are 50×30mm. These defined trench dimensions provide standardized space for pipeline laying, facilitating operations by construction personnel and also promoting the factory production of precast blocks, thus improving production efficiency.

[0019] Based on the above construction method, the present invention also provides a prefabricated modular floor filling system, characterized in that it comprises: Base treatment layer: Composed of a cleaned and leveled kitchen floor base layer, providing a stable foundation for the entire system.

[0020] Self-leveling layer: A cement-based self-leveling compound with a thickness of not less than 3mm is laid on the base layer to ensure the flatness of the ground.

[0021] Waterproof layer: 1.5mm thick polymer cement-based waterproof coating, extending 1.2m up the wall, 0.5m outward from the doorway, and 0.3m outward on both sides, effectively preventing water penetration.

[0022] Protective layer: 10mm thick DS dry-mixed mortar compacted layer, protecting the waterproof layer from damage and enhancing the strength of the ground.

[0023] Precast filler block layer: Precast lightweight aggregate concrete blocks (standard size 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³) 3 It is laid with a water absorption rate of ≤6%, and the blocks are pre-grooved with 50×30mm pipe grooves, which are caulked with a special adhesive. The prefabricated filling block layer is the core part of the system, realizing modular filling of the ground and separation of pipelines.

[0024] Balancing layer: 8mm thick calcium silicate board, bonded to the precast blocks with 6mm thick adhesive to balance the ground load and enhance stability.

[0025] Surface layer: 10mm thick ceramic tile, with a 6mm thick layer of tile adhesive applied to the bottom surface, and the gaps filled with grout. This completes the final step of the floor renovation, providing a beautiful and durable floor surface.

[0026] Furthermore, the precast blocks can be customized in size according to site requirements, and steel wire mesh reinforcement is added inside the precast blocks containing pipe grooves. The precast blocks can be customized according to the size and layout of different kitchens, improving the system's adaptability and flexibility; the steel wire mesh reinforcement inside the precast blocks containing pipe grooves further enhances the structural strength of the precast blocks at the pipe grooves, ensuring the system's stability and safety.

[0027] The beneficial effects of the present invention are as follows: As can be seen from the above technical solution, this application provides a construction method and filling system for a modular prefabricated ground filling system, which eliminates the overhead layer and replaces it with lightweight prefabricated blocks, making it comfortable for people to walk on the ground without the phenomenon of stepping into empty spaces; the bottom is sealed and dense, making it difficult for water to accumulate, preventing the breeding of insects and ants, and has advantages such as strong moisture resistance, sound insulation and load-bearing performance.

[0028] This invention combines modular design with factory production, significantly improving construction efficiency and quality stability. Factory-prefabricated lightweight aggregate concrete blocks are standardized in size and quality, avoiding quality problems caused by manual variations during on-site construction, such as dimensional deviations and uneven strength. Simultaneously, the modular design makes on-site construction as simple as "building blocks," requiring only assembly and adjustment according to predetermined steps, greatly shortening the construction cycle. Taking kitchen floor renovation as an example, traditional wet construction methods may take several days or even weeks to complete, while this technology can complete all work from base treatment to surface layer laying in just a few days, with more guaranteed quality, reducing uncertainties caused by long construction cycles, such as the impact of weather changes on construction quality.

[0029] This technical solution actively responds to the concepts of green building and environmentally friendly construction, achieving a construction environment free of wet work and dust pollution. Traditional wet work processes in floor decoration, such as cement mortar leveling and self-leveling, generate large amounts of dust and waste, causing serious pollution to the construction site and surrounding environment. This technical solution, by adopting a dry construction method, avoids this pollution at its source, providing a healthier and safer working environment for construction workers and reducing disturbance to nearby residents. Furthermore, the factory production of prefabricated blocks enables precise material proportioning and efficient utilization, reducing material waste, improving resource utilization, and meeting the requirements of sustainable development.

[0030] The pre-cast block design with pre-reserved pipe grooves greatly facilitates pipeline laying. In traditional floor renovations, pipeline pre-embedding often requires cutting grooves and burying pipes in the floor base. This not only damages the floor structure and increases construction difficulty, but also necessitates disrupting the overall renovation structure for pipeline repair or replacement during subsequent maintenance and renovations, resulting in high costs and time-consuming labor. In this application, however, pipelines can be directly laid within the pre-reserved pipe grooves in the precast blocks, achieving separation between the pipelines and the floor slab. This design not only avoids the positional offset problems caused by wet pre-embedding, improving the accuracy and flexibility of pipeline laying, but also allows for pipeline operations during subsequent maintenance and renovations simply by disassembling the corresponding precast blocks, without damaging the overall renovation structure. This significantly reduces maintenance costs and construction difficulty, and improves the sustainability of the renovation.

[0031] The base treatment layer ensures the flatness and stability of the ground foundation; the self-leveling layer further improves the flatness of the ground, providing a good base surface for subsequent construction; the waterproof layer effectively prevents water penetration and protects the building structure; the protective layer enhances the overall strength of the ground and prevents the waterproof layer from being damaged during subsequent construction; the precast infill block layer, as the core component, uses lightweight granular concrete, which has high compressive strength and low density, ensuring the load-bearing capacity of the ground while reducing the ground load; the balancing layer can balance the ground load and prevent ground deformation or damage caused by excessive local load; the surface layer provides an aesthetically pleasing and durable ground surface. These layers work together synergistically to form a stable and reliable ground structure system that can meet the long-term use requirements of scenarios such as kitchens.

[0032] Precast blocks can be customized to size to meet specific site requirements, allowing flooring solutions to better adapt to different kitchen sizes and layouts. Furthermore, the choice of surface materials is diverse; users can select tiles of different materials, colors, and textures to match their preferences and decorating styles, such as marble-look tiles and wood-look tiles, creating diverse decorative effects. In addition, the use of grout not only fills the tile gaps and prevents moisture penetration but also serves a decorative purpose, enhancing the overall aesthetics of the floor. Through these design features, this technical solution provides users with a more personalized and aesthetically pleasing flooring solution, improving their quality of life. Attached Figure Description

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the construction method.

[0034] Figure 2 This is a pipeline layout plan.

[0035] Figure 3 This is a node diagram of prefabricated modular blocks. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application. Example 1 like Figure 1-3 The following is a construction method for a prefabricated modular floor filling system, comprising the following steps: Step 1: First, clean the kitchen floor base according to the design requirements of the drawings, and repair and smooth out any honeycomb or pitted surfaces to make the base clean and tidy. Step 2: Add water to the finished cement-based self-leveling compound according to the product instructions and stir until it becomes viscous. Then pour it onto the cleaned kitchen floor and use a 2-meter screed to spread the cement self-leveling compound evenly. The thickness of the cement self-leveling compound should not be less than 3mm.

[0037] Step 3: After the cement base reaches its strength and dries, apply multiple coats of polymer cement-based waterproof coating to achieve a thickness of 1.5mm. The coating should extend 1.2m up the wall, 0.5m outward from the doorway, and 0.3m outward from both sides of the doorway.

[0038] Step 4: After the polymer cement-based waterproof coating dries, conduct a water tightness test as required. If there is no leakage after 24 hours, drain the water before proceeding to the next step.

[0039] Step 5: After the water is drained, spread a 10mm thick layer of DS dry-mixed mortar on top of the waterproofing and compact it. Wait 12 hours and then spray water for curing to prevent the protective layer from cracking.

[0040] Step Six: After the waterproof protective layer reaches its design strength, install the pre-fabricated lightweight aggregate concrete blocks (standard block size: 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³). 3 Water absorption rate ≤6%, other sizes can also be customized according to site conditions; precast block pipe channels are pre-processed and reserved in the factory, and the precast blocks with pipe channels are reinforced with steel wire mesh and transported to the site; A 50*30mm pipe groove is pre-reserved in the 55mm thick prefabricated module for pipe embedding. (See details) Figure 2 , Figure 3 Then, lightweight aggregate concrete blocks are laid. After installation, the flatness is adjusted, and a special adhesive is used to seal the joints to prevent the surface layer from being affected by unevenness, looseness, and shaking.

[0041] Step 7: After the granulated lightweight aggregate concrete blocks are completed and the special adhesive has cured, lay an 8mm thick calcium silicate board balancing layer on the precast blocks to ensure the overall stability and durability of the kitchen floor (a 6mm thick adhesive is used to bond the precast blocks under the calcium silicate board balancing layer). Step 8: After the calcium silicate board balancing layer is laid, start laying the tiles (10mm thick) on top. Apply a 6mm thick layer of tile adhesive to the bottom of the tiles to make them flat. After the tile adhesive dries, use grout to seal the tile gaps.

[0042] Furthermore, the precast blocks are made of lightweight granulated concrete, and the pipe trench locations are pre-reserved according to the pipeline layout. The precast blocks with pipe trenches are reinforced with wire mesh. The lightweight granulated concrete material makes the precast blocks lightweight, facilitating handling and installation; the pre-reserved pipe trench locations improve the flexibility and accuracy of pipeline laying; and the added wire mesh reinforcement enhances the structural strength of the precast blocks at the pipe trench location, preventing damage to the precast blocks caused by pipe trench excavation.

[0043] Furthermore, the trench dimensions are 50×30mm. These defined trench dimensions provide standardized space for pipeline laying, facilitating operations by construction personnel and also promoting the factory production of precast blocks, thus improving production efficiency.

[0044] Based on the above construction method, the present invention also provides a prefabricated modular floor filling system, characterized in that it comprises: Base treatment layer: Composed of a cleaned and leveled kitchen floor base layer, providing a stable foundation for the entire system.

[0045] Self-leveling layer: A cement-based self-leveling compound with a thickness of not less than 3mm is laid on the base layer to ensure the flatness of the ground.

[0046] Waterproof layer: 1.5mm thick polymer cement-based waterproof coating, extending 1.2m up the wall, 0.5m outward from the doorway, and 0.3m outward on both sides, effectively preventing water penetration.

[0047] Protective layer: 10mm thick DS dry-mixed mortar compacted layer, protecting the waterproof layer from damage and enhancing the strength of the ground.

[0048] Precast filler block layer: Precast lightweight aggregate concrete blocks (standard size 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³) 3 It is laid with a water absorption rate of ≤6%, and the blocks are pre-grooved with 50×30mm pipe grooves, which are caulked with a special adhesive. The prefabricated filling block layer is the core part of the system, realizing modular filling of the ground and separation of pipelines.

[0049] Balancing layer: 8mm thick calcium silicate board, bonded to the precast blocks with 6mm thick adhesive to balance the ground load and enhance stability.

[0050] Surface layer: 10mm thick ceramic tile, with a 6mm thick layer of tile adhesive applied to the bottom surface, and the gaps filled with grout. This completes the final step of the floor renovation, providing a beautiful and durable floor surface.

[0051] Furthermore, the precast blocks can be customized in size according to site requirements, and steel wire mesh reinforcement is added inside the precast blocks containing pipe grooves. The precast blocks can be customized according to the size and layout of different kitchens, improving the system's adaptability and flexibility; the steel wire mesh reinforcement inside the precast blocks containing pipe grooves further enhances the structural strength of the precast blocks at the pipe grooves, ensuring the system's stability and safety.

[0052] Example 2 A construction method for a prefabricated modular floor filling system includes the following steps: (1) Grassroots processing: Clean the base layer of the kitchen floor to remove grease, dust, and loose materials; Defects such as honeycomb pitting and cracks are repaired with cement mortar, and the surface flatness error after repair is ≤3mm / 2m. The moisture content of the base layer should be ≤8%, and the pH value should be in the range of 6-9.

[0053] (2) Self-leveling construction: Mix the finished cement-based self-leveling material with water at a mass ratio of 1:0.2-0.25 until it reaches a uniform viscous consistency, and stir for ≥3 minutes. Spread it on the base layer and use a 2-meter screed to smooth it in the same direction, with a thickness of (3-5) mm; The ambient temperature during construction should be controlled between 5 and 35°C, and the relative humidity should be ≤85%. Before the self-leveling compound sets, surface defoaming treatment should be completed, and stepping on it is prohibited within (24±2) hours after final setting.

[0054] (3) Waterproofing treatment: After the cement-based self-leveling compound reaches a strength of 1.5 MPa (tested according to GB / T 17671) and is dry, apply a polymer cement-based waterproof coating. The waterproof coating is applied in two coats, with a total thickness of 1.5mm. Apply the second coat after the first coat has dried (the coating is no longer sticky to the touch). The waterproof layer should extend up to a height of ≥1.2m when it encounters a wall, extend outward by ≥0.5m beyond the doorway, and extend outward by ≥0.3m on both sides; After the waterproof layer is applied, a 24-hour water tightness test is conducted. The water level should be ≥20mm. If there is no leakage, the accumulated water should be removed.

[0055] (4) Construction of protective layer: After the water is drained, spread a 10mm thick layer of DS dry-mixed mortar and compact and smooth it with a wooden trowel. Sprinkle water for 12 hours to maintain moisture on the surface during the maintenance period.

[0056] (5) Precast block laying: After the waterproof protective layer reaches the design strength (≥15MPa), prefabricated lightweight aggregate concrete blocks are laid. The standard dimensions of the precast blocks are (1000±50) mm × (1000±50) mm × (55±3) mm, with a compressive strength ≥3.0 MPa (tested according to GB / T 50081) and a bulk density ≤700 kg / m³. 3 Water absorption rate ≤6%; Pipe trenches are reserved according to the pipeline layout. The dimensions of the pipe trenches are (50±5) mm × (30±3) mm. Steel wire mesh (diameter ≥ 0.5 mm, mesh size ≤ 50 mm × 50 mm) is added inside the precast blocks containing the pipe trenches for reinforcement. The precast blocks are caulked with a special adhesive (bonding strength ≥1.0MPa), and the joint width is ≤5mm; Use a laser level to adjust the flatness during laying, and the height difference between adjacent blocks should be ≤2mm / 2m.

[0057] (6) Construction of the balancing layer: An 8mm thick calcium silicate board balancing layer is laid on the precast blocks, with a calcium silicate board density ≥1200kg / m³. 3 Combustion performance rating: Class A; The lower layer is bonded with 6mm thick tile adhesive (bonding strength ≥1.5MPa), and the adhesive is applied evenly without any omissions; After the balancing layer is applied, let it stand for 24 hours until the adhesive has cured before proceeding to the next step of the application.

[0058] (7) Tile laying: A 10mm thick ceramic tile is laid on the balancing layer. The water absorption rate of the ceramic tile is ≤0.5%, and the Mohs hardness is ≥6. Apply a 6mm thick layer of tile adhesive to the bottom of the tile and use a notched scraper to create stripes. After the tiles are laid, use a rubber mallet to gently tap and compact them to remove air. The width of the gap between adjacent tiles should be (1.5-3) mm. After the tiles have dried (≥48 hours), fill the gaps with grout (Shore hardness ≥60), with a filling depth ≥3mm.

[0059] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A construction method for a prefabricated modular floor filling system, characterized in that, Includes the following steps: Substrate preparation: Clean the kitchen floor substrate according to the design requirements of the drawings, repair honeycomb-like pits, and ensure that the substrate is clean and tidy; Self-leveling construction: Add water to the finished cement-based self-leveling compound and stir until it becomes viscous. Spread it on the base layer with a thickness of not less than 3mm and use a 2-meter screed to spread it evenly. Waterproofing treatment: After the cement-based self-leveling compound has reached its strength and dried, apply a polymer cement-based waterproof coating with a thickness of 1.5mm. When encountering a wall, extend it 1.2m up, extend it 0.5m outward beyond the doorway, and extend it 0.3m outward on both sides. Water tightness test: After the waterproof coating dries, a 24-hour water tightness test is conducted. If there is no leakage, the accumulated water is removed. Protective layer construction: After water tightness and drainage, spread 10mm thick DS dry-mixed mortar, compact it, and water-cur it for 12 hours; Precast block installation: After the waterproof protective layer reaches its design strength, lay factory-precast lightweight aggregate concrete blocks (standard size 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³). 3 (Water absorption rate ≤6%), reserve pipe grooves, the size of the pipe grooves needs to be adjusted according to the actual pipeline, and after adjusting the flatness, use special adhesive to fill the gaps; Balance layer construction: An 8mm thick calcium silicate board balance layer is laid on the precast blocks, and a 6mm thick adhesive is used to bond the lower layer. Tile laying: Lay 10mm thick tiles on the balancing layer, apply 6mm thick tile adhesive to the bottom surface, and fill the grout with sealant after drying.

2. The construction method of a prefabricated modular ground filling system according to claim 1, characterized in that: The precast blocks are made of lightweight granulated concrete, and the pipe trench positions are reserved according to the pipeline layout. The precast blocks containing pipe trenches are reinforced with wire mesh.

3. The construction method of a prefabricated modular ground filling system according to claim 1, characterized in that: The dimensions of the tube groove are 50×30mm.

4. The modular prefabricated floor filling system according to claim 1, characterized in that, It includes: Base treatment layer: consists of the cleaned and leveled kitchen floor base layer; Self-leveling layer: Cement-based self-leveling compound with a thickness of not less than 3mm, spread on the base layer; Waterproof layer: 1.5mm thick polymer cement-based waterproof coating, extending 1.2m up the wall, 0.5m outward from the doorway, and 0.3m outward on both sides; Protective layer: 10mm thick DS dry-mixed mortar compacted layer; Precast filler block layer: Precast lightweight aggregate concrete blocks (standard size 1000×1000mm×55mm, compressive strength ≥3.0Mpa, density ≤700kg / m³) from the factory. 3 The blocks are laid with a water absorption rate of ≤6%, and 50×30mm pipe grooves are reserved in the blocks and caulking is done with special adhesive. Balancing layer: 8mm thick calcium silicate board, bonded to the precast blocks with 6mm thick adhesive; Top layer: 10mm thick ceramic tile, bottom layer is fully coated with 6mm thick ceramic tile adhesive, and gaps are filled with grout.

5. A modular prefabricated floor filling system according to claim 4, characterized in that: The precast blocks can be customized in size according to site requirements, and steel wire mesh is added inside the precast blocks containing pipe grooves for reinforcement.

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