Modular forming method of prefabricated cavity integrated floor component

Abstract

The modular forming method of the prefabricated cavity integrated floor system component comprises the following steps that S1, longitudinal steel bars and transverse steel bars are laid in a special bottom die, and a steel bar mesh is formed; concrete is poured and vibrated compactly, and the prefabricated ribbed bottom plate with the flat upper surface and the longitudinal and transverse ribs on the lower surface is formed; and S2, a longitudinal expansion module, a longitudinal adjusting module, a transverse expansion module and a transverse adjusting module with the upper surface smaller than the lower surface and the side vertical face provided with a vertical arc-shaped concave part are manufactured through an injection molding or mold pressing or welding method. The method is high in integration level and controllable in quality. The forming procedures of prefabricating the ribbed bottom plate, the longitudinal expansion die, the longitudinal adjusting module, the transverse expansion module, the transverse adjusting module, the steel bar truss and the cast-in-place ribbed beam are integrally completed in a factory, the forming precision and the overall quality of the complex cavity and the special-shaped ribbed beam are guaranteed through module standardization and precise assembly, and the product consistency is good.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, specifically referring to a modular molding method for producing prefabricated integrated cavity floor slab components that are formwork-free and dimensionally adjustable. Background Technology

[0002] Currently, traditional cast-in-place hollow concrete slab production mostly uses fixed molds for integral casting, resulting in fixed dimensions and specifications that cannot flexibly adapt to diverse building column grid requirements. Furthermore, on-site casting of the slab requires the installation of supports and formwork at the bottom. For components with complex cavities or irregularly shaped ribs, the production mold costs are high and the methods are quite complex.

[0003] While existing technologies incorporate the concept of modular assembly, they primarily focus on on-site construction and assembly. This not only demands high levels of technical skill from workers but also requires on-site casting of ribs and panels, resulting in slow construction speeds. Therefore, there is an urgent need for a new production method that can achieve efficient and high-precision prefabrication in factories while enabling finished components to be assembled quickly on-site without formwork and with flexible dimensional adjustments. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a modular molding method for prefabricated cavity integrated floor slab components.

[0005] The objective of this invention is achieved through the following technical solution: a modular molding method for prefabricated cavity integrated floor slab components, comprising the following steps: S1. Lay longitudinal and transverse steel bars in a special bottom mold to form a steel mesh; pour concrete and vibrate it to compact it, forming a precast ribbed bottom slab with a flat upper surface and longitudinal and transverse ribs on the lower surface. S2. A longitudinal expansion mold, a longitudinal adjustment module, a transverse expansion module, and a transverse adjustment module are prepared by injection molding, compression molding, or welding methods, with the upper surface being smaller than the lower surface and the side facade having a vertical arc-shaped recess. S3. Install a set of length adjustment modules at each of the two ends of the precast ribbed base plate, and install at least one set of expandable modules between the two sets of length adjustment modules. Each set of length adjustment modules includes a longitudinal adjustment module and two transverse adjustment modules symmetrically arranged on both sides of it. Each set of expandable modules includes a longitudinal expansion module and two transverse expansion modules symmetrically arranged on both sides of it, and longitudinal and transverse gap channels are formed between the adjacent modules. S4. Hoist the steel truss and place it into all the gaps and channels formed in step S3, and adjust the position of the steel truss to fix it. S5. Pour micro-expansion fine stone concrete or self-compacting concrete into all gaps and channels, and steam-cur or standard moisturizing curing is performed on the entire component after pouring. S6. After curing, demold the components and inspect their appearance, dimensions, and strength.

[0006] Furthermore, in step S1, the concrete is poured and vibrated to ensure compaction. The slump of the concrete is 120mm ± 20mm, and its strength grade is not lower than C30.

[0007] Furthermore, after pouring and compacting the concrete in step S1, it is necessary to immediately cover and cure it, and let it stand until the compressive strength of the concrete reaches more than 70% of the design strength.

[0008] As a preferred embodiment, the longitudinal expansion mold, longitudinal adjustment module, transverse expansion module, and transverse adjustment module are all trapezoidal hollow cavities, with a demolding angle of 3° to 8° and a radius of curvature R of the arc-shaped recess on the side facade of 30mm to 80mm.

[0009] The longitudinal expansion module, longitudinal adjustment module, lateral expansion module, and lateral adjustment module are made of polypropylene, ABS engineering plastic, galvanized steel plate, or aluminum alloy.

[0010] Furthermore, the cross-section of the steel truss mentioned in step S4 is triangular or rectangular, and a lifting point is provided on the steel truss. The web reinforcement bars in the steel truss that are fixedly connected to the lifting point are HPB300.

[0011] The step S4 of adjusting the position of the steel truss for fixing specifically includes adjusting the position of the steel truss so that the height of its bottom from the overlapping surface of the precast ribbed base plate is 15mm±5mm, and binding or welding the lower chord steel bars or bottom connectors of the steel truss to the steel mesh in the precast ribbed base plate for fixing.

[0012] In step S5, "pouring micro-expansion fine aggregate concrete or self-compacting concrete into all gap channels", the slump of the micro-expansion fine aggregate concrete is not less than 220mm, and the spread of the self-compacting concrete is 600mm±50mm.

[0013] The strength grade of the micro-expansion fine aggregate concrete or self-compacting concrete is matched with or one grade higher than the strength grade of the precast ribbed base plate concrete.

[0014] When performing steam curing or standard moisturizing curing as described in step S5, the heating rate shall not exceed 15℃ / h, and the constant temperature shall be 50℃-65℃.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The method of the present invention has a high degree of integration and controllable quality. The present invention integrates the forming processes of prefabricated ribbed base plate, longitudinal expansion mold, longitudinal adjustment module, transverse expansion module, transverse adjustment module, steel truss and cast-in-place rib beam in the factory. Through standardized modules and precise assembly, the forming accuracy and overall quality of complex cavities and irregular rib beams are guaranteed, and the product consistency is good.

[0016] (2) The longitudinal expansion module, longitudinal adjustment module, transverse expansion module and transverse adjustment module of the present invention are themselves permanent inner membranes, which are combined with the precast ribbed base plate and cast-in-place concrete to form an integral whole. This eliminates the process of setting up and dismantling the complex inner membrane in the traditional method, simplifies the production process and improves efficiency.

[0017] (3) This invention, through the combined design of "fixed-modulus expandable module group" and "cuttable length adjustment module group", enables the same production method to produce components covering multiple span specifications. The factory can prefabricate "semi-finished products" according to the maximum transport size, and the final size can be achieved on the construction site by simply cutting and adjusting the modules according to the actual situation, which perfectly solves the contradiction between standardized production and personalized needs, and between large components and transportation limitations.

[0018] (4) The components produced by the present invention have a cast-in-place inverted trapezoidal rib beam that is closely integrated with the precast ribbed base plate, longitudinal expansion mold, longitudinal adjustment module, transverse expansion module and transverse adjustment module. The internal continuous steel truss reinforcement forms a strong and tough load-bearing skeleton, which significantly improves the overall stiffness, bearing capacity and crack resistance of the components.

[0019] (5) The finished component of the present invention is a complete structural unit. It can bear the load after being hoisted into place on site, which greatly reduces the amount of on-site support and wet work, and the construction speed is fast and the level of civilized construction on site is high. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall method flow of the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0022] Example

[0023] like Figure 1 As shown in the figure, the modular forming method of the prefabricated cavity integrated floor slab component described in this embodiment includes six steps S1 to S6.

[0024] Step S1 is the method for forming a precast ribbed base plate, which involves laying longitudinal and transverse steel bars in a special base mold to form a steel mesh; pouring concrete and vibrating it to compact it, forming a precast ribbed base plate with a flat upper surface and longitudinal and transverse ribs on the lower surface.

[0025] The steel mesh is the core load-bearing framework of the precast ribbed base slab and a fundamental node for overall force transmission in the floor slab structure. Its function extends throughout the entire lifecycle of the precast base slab fabrication, transportation, hoisting, and use of the floor slab structure. To achieve better performance, HRB400 grade hot-rolled ribbed steel bars are preferentially selected for both longitudinal and transverse reinforcement in this embodiment. This fully utilizes their high tensile strength and good bond with concrete to meet the overall load-bearing requirements.

[0026] The slump of the poured concrete is 120mm ± 20mm, and its strength grade is not lower than C30. This slump falls within the category of plastic concrete and is the optimal workability index designed for the characteristics of the mold, reinforcement arrangement, forming requirements, and construction methods of the precast ribbed base slab in this embodiment. It ensures the concrete's flowability and filling capacity while avoiding quality problems caused by excessive fluidity. Specifically, it adapts to the ribbed mold and the reinforcing mesh to ensure dense filling of the concrete. The precast base slab uses a special bottom mold with longitudinal and transverse ribs. The mold cavity has concave and convex corners and rib gaps, and is lined with reinforcing mesh. The slump of 120mm ± 20mm gives the concrete moderate fluidity, allowing it to smoothly fill the corners of the mold cavity, rib gaps, and gaps in the reinforcing mesh. Combined with vibration, air bubbles can be completely expelled, avoiding forming defects such as honeycomb, pitting, and voids, and ensuring the density of the ribbed base slab (especially the ribbed area).

[0027] Precast ribbed slabs serve as the foundational load-bearing layer of floor slabs, needing to withstand the pouring and vibration loads during fabrication, the dynamic loads during transportation / hoisting, and the construction loads from the cast-in-place rib beams. C30 concrete's compressive and flexural strengths can meet these full-cycle load requirements, representing the minimum strength threshold for the structural safety of ribbed slabs. Of course, as the span increases, it can be upgraded to C35 or C40 to further enhance its load-bearing capacity.

[0028] In this embodiment, the concrete slump of 120mm±20mm and the strength grade ≥C30 represent a precise match between workability and structural performance. This ensures both the required strength and density of the structure and meets the requirements of the precast ribbed base plate forming method.

[0029] In this step, after pouring the concrete, it is necessary to cover and cure it immediately, and let it stand until the compressive strength of the concrete reaches more than 70% of the design strength.

[0030] S2. A longitudinal expansion mold, a longitudinal adjustment module, a transverse expansion module, and a transverse adjustment module are prepared by injection molding, compression molding, or welding methods, with the upper surface being smaller than the lower surface and the side facade having a vertical arc-shaped recess.

[0031] The aforementioned longitudinal expansion module, longitudinal adjustment module, lateral expansion module, and lateral adjustment module are all permanent internal molds with hollow cavity structures, and are key components for realizing modular assembly and flexible size adjustment of the floor slab. For ease of subsequent description, this embodiment refers to the aforementioned longitudinal expansion module, longitudinal adjustment module, lateral expansion module, and lateral adjustment module collectively as hollow modules. In this embodiment, these hollow modules are preferably made of polypropylene, ABS engineering plastic, galvanized steel plate, or aluminum alloy, forming a trapezoidal hollow cavity with an upper surface smaller than the lower surface. The module wall thickness varies from 2mm to 10mm depending on the material, and the radius of curvature R of the vertical arc-shaped recess on the side facade is 30mm to 80mm.

[0032] When hollow modules are made of polypropylene or ABS engineering plastics, they are manufactured using injection molding or compression molding. Injection molding is a one-time molding method, while compression molding is a pressure molding method; both allow the thermoplastic plastic to be fully shaped within the mold. The resulting plastic modules have uniform wall thickness, are dense internally, and possess advantages such as light weight, corrosion resistance, insulation, and good adhesion to concrete. They can also be precisely molded into irregularly shaped structures such as vertical curved recesses and trapezoidal platforms without seams. When hollow modules are made of galvanized steel sheets or aluminum alloys, welding is used. Welding connects the metal sheets into a hollow trapezoidal platform structure, ensuring the structural rigidity and compressive strength of the metal modules. This is suitable for large-span, high-load floor slab requirements. Furthermore, galvanized steel sheets or aluminum alloys have strong deformation resistance, can withstand the pouring pressure of cast-in-place concrete, and are not easily damaged.

[0033] To facilitate demolding, the hollow modules all have a demolding slope of 3° to 8° to adapt to factory manufacturing and on-site installation. At the same time, the structure of the hollow modules, which are larger at the bottom and smaller at the top, allows the hollow modules to form a more stable "interlocking" with the precast ribbed base plate and the upper cast-in-place concrete, further improving their tightness of bonding.

[0034] S3. Install a set of length adjustment modules at each of the two ends of the precast ribbed base plate, and install at least one set of expandable modules between the two sets of length adjustment modules. Each set of length adjustment modules includes a longitudinal adjustment module and two transverse adjustment modules symmetrically arranged on both sides of it. Each set of expandable modules includes a longitudinal expansion module and two transverse expansion modules symmetrically arranged on both sides of it, and longitudinal and transverse gap channels are formed between the adjacent modules.

[0035] The longitudinal extension module is arranged along the span direction of the floor slab component and is the basis for the formation of longitudinal gap channels. Its size is a standard module, such as a bottom of 820mm×820mm. It can be arranged at equal intervals with a fixed center distance of 600-1200mm. The modular expansion of the floor slab length can be achieved by adding N groups (N≥1).

[0036] The transverse expansion modules are symmetrically arranged on both sides of the longitudinal expansion modules, along the width of the floor slab, to form a transverse gap channel with the longitudinal modules. They also serve to fix the position of the longitudinal modules and optimize the stress distribution in the floor slab cavity. The bottom dimensions are preferably made to be 270mm×820mm.

[0037] The longitudinal and transverse adjustment modules are size adaptation modules for the floor slab components, located at both ends of the precast floor slab. Their core function is to adapt to the actual column grid dimensions on site and solve transportation limitations. In this embodiment, the initial length L0 of the length adjustment module group is designed as the standard transportation unit length, and it uses materials that are easy to cut on site, such as foamed cement composite board, reinforced fiber gypsum board, or specially marked plastic templates, to facilitate transportation and on-site adaptation to the final building dimensions.

[0038] Because the hollow module has a vertical arc-shaped recess on its side facade, when two adjacent hollow modules face each other, they will form a continuous longitudinal gap channel and a transverse gap channel with an inverted trapezoidal cross-section, providing space for the subsequent implantation of steel trusses and the casting of cast-in-place rib beams.

[0039] Meanwhile, at least two parallel annular weakening grooves are provided longitudinally on the outer end faces of the longitudinal and lateral adjustment modules. The depth of the annular weakening grooves is 1 / 3 to 1 / 2 of the wall thickness of the longitudinal or lateral adjustment module. Conspicuous colored safety cutting indicator lines are provided between the annular weakening grooves and between the annular weakening grooves and the edges of the longitudinal or lateral adjustment modules. These colored safety cutting indicator lines are formed by printing or spraying with pigments that have a color difference ΔE ≥ 15 from the module substrate, and are used to guide on-site cutting and adjustment to predetermined dimensions.

[0040] In the vertical arc-shaped recesses on the side facades of the longitudinal and transverse expansion modules, at least two parallel annular ribs are provided vertically. The cross-section of the annular ribs is semi-circular or trapezoidal, and their height is 2mm-5mm. When adjacent modules are spliced, the annular ribs form a circumferential concave-convex texture on the inner wall of the gap channel, forming a circumferential interlocking structure with the poured concrete. At the same time, the groove area between the annular ribs forms an axial limiting fit with the web reinforcement of the steel truss.

[0041] S4. Hoist the steel truss and place it into all the gaps and channels formed in step S3, and adjust the position of the steel truss to fix it.

[0042] The steel truss is the core load-bearing skeleton and structural connection link of the precast hollow integrated floor slab component described in this embodiment. It is not simply reinforced with steel bars, but a key component that connects the precast ribbed base plate, hollow modules and cast-in-place inverted trapezoidal rib beams. Its role runs through the entire life cycle of component production, construction and use, and directly determines the overall stiffness, bearing capacity and crack resistance of the floor slab.

[0043] The cross-sectional dimensions of the steel truss are precisely matched with the inverted trapezoidal gap channels. After installation, it can serve as an internal positioning reference for the cast-in-place rib beams, preventing channel deformation during concrete pouring and ensuring consistent cross-sectional dimensions and straightness of the rib beams, thus meeting the requirements of high-precision factory production of components. In this embodiment, the cross-section of the steel truss is preferably made into a triangle or rectangle, with its upper and lower chords forming a tension / compression skeleton, and the web reinforcement connecting to form a stable truss system. Compared with traditional scattered reinforcement, it can more efficiently transfer and distribute loads, significantly improving the mid-span bearing capacity and overall stiffness of the floor slab, and avoiding excessive deformation under large spans.

[0044] As a preferred embodiment, the steel truss can be fabricated as an inverted trapezoidal variable cross-section steel truss, whose inverted trapezoidal variable cross-section can further perfectly match the inverted trapezoidal gap channel. The so-called inverted trapezoidal variable cross-section steel truss refers to a truss with a narrow bottom width and a wide top width, where the web reinforcement gradually changes in angle with the cross-section, and the angle of inclination is consistent with the demolding slope (3°-8°) of the hollow module. When using this inverted trapezoidal variable cross-section steel truss, it can accurately match the gap channel and stress characteristics, effectively overcoming the shortcomings of traditional steel trusses and the poor fit with the inverted trapezoidal gap channel in this method, which easily leads to concrete filling gaps and cannot adapt to the stress change characteristics of the rib beam from bottom to top. This structure not only allows for seamless fitting between the steel truss and the inverted trapezoidal gap channel and the arc-shaped recess of the hollow module, eliminating filling blind spots after concrete pouring and improving bonding density, but also adapts to the stress distribution of the cast-in-place rib beam. The reinforcement density of the upper and lower chord reinforcement is adjusted according to the gradual change in cross-section, achieving optimal utilization of material mechanical properties and saving steel reinforcement.

[0045] The lower chord steel bars of the steel truss are provided with multiple spaced protruding anchor points. These protruding anchor points are spatially misaligned with the vertical arc-shaped recesses on the side facade of the hollow module, forming a mechanical interlocking structure after the concrete is poured.

[0046] In this embodiment, if necessary, a cement-based penetrating anti-corrosion and wear-resistant coating can be sprayed onto the lower chord reinforcement and connection nodes of the steel truss. The coating thickness is controlled at 0.5-1mm, the adhesion between the coating and the concrete is ≥1.5MPa, and it does not affect the bond strength between the reinforcement and the concrete. At the same time, a wear-resistant release coating is sprayed onto the part of the web reinforcement near the hollow module to reduce frictional damage to the curved recess of the module when the truss is installed.

[0047] The cement-based penetrating anti-corrosion coating has good compatibility with concrete and can effectively isolate moisture and carbon dioxide, prevent corrosion of the lower chord reinforcement and connection nodes of the steel truss, and improve the durability of the components in harsh environments. The wear-resistant release coating can reduce the friction between the steel truss and the hollow module during the installation of the steel truss, avoid damage to the hollow module and peeling off of the steel truss coating, and ensure the smoothness of factory assembly.

[0048] As the "load-bearing skeleton" for hoisting prefabricated hollow integrated floor slab components, the top of the overall hoisting truss is also equipped with hoisting points. The web reinforcement, which also serves as the hoisting points, is made of HPB300 and is clearly marked. The overall rigidity of the steel truss can withstand the dynamic load during component hoisting, enabling the finished floor slab components to be hoisted into place as a whole without the need for additional hoisting points on site, which greatly improves on-site construction efficiency and reduces on-site wet work.

[0049] After the steel truss is placed into all the gap channels, it is necessary to further adjust the position of the steel truss and fix it. Specifically, this includes adjusting the position of the steel truss so that the height of its bottom from the overlapping surface of the precast ribbed base plate is 15mm±5mm, and binding or welding the bottom chord steel bars or bottom connectors of the steel truss to the steel mesh in the precast ribbed base plate.

[0050] S5. Pour micro-expansion fine stone concrete or self-compacting concrete into all gaps and channels, and steam-cur or standard moisturizing curing is performed on the entire component after pouring.

[0051] This step involves composite casting and curing of the interstitial channel. The slump of the cast micro-expansion fine aggregate concrete is no less than 220 mm, and the spread of the self-compacting concrete is 600 mm ± 50 mm. The strength grade of the micro-expansion fine aggregate concrete or the self-compacting concrete matches or is one grade higher than the strength grade of the precast ribbed base slab concrete.

[0052] During pouring, a small immersion vibrator is used for auxiliary vibration, with a focus on ensuring that the curved recessed area on the side facade of the hollow module is filled densely. After pouring, the entire component is steam-cured or standard moisturizing-cured. The curing regime is as follows: the heating rate is no more than 15℃ / h, the constant temperature is 50℃-65℃, and the constant temperature time is determined according to the concrete mix ratio to ensure that the strength of the poured body reaches the design value. Throughout the curing process, the component should be kept in a horizontal position.

[0053] To improve the effectiveness of pouring and vibration, this embodiment employs a staged vibration process. Specifically: the first stage of vibration uses a low-frequency vibrator at a frequency of 25Hz-35Hz for 15-20 seconds to initially fill the bottom of the gaps in the concrete; after standing for 2-3 minutes, the second stage of vibration is performed using a high-frequency vibrator at a frequency of 45Hz-55Hz for 10-15 seconds. During the second stage of vibration, the insertion point of the vibrator avoids the interface between the web reinforcement of the steel truss and the arc-shaped recess of the hollow module. The distance between the vibrator and the arc-shaped recess is controlled at 30mm-50mm to ensure that the concrete in the arc-shaped recess area is densely filled and free of air bubbles.

[0054] S6. After curing, demold the components and inspect their appearance, dimensions, and strength. For the length adjustment module group area reserved in the design for final on-site size adjustment, mark the safety cutting indicator line with a conspicuous color on its outer surface.

[0055] As described above, the present invention can be achieved to a high degree.

Claims

1. A modular molding method for prefabricated integrated hollow floor slab components, characterized in that, Includes the following steps: S1. Lay longitudinal and transverse steel bars in a special bottom mold to form a steel mesh; pour concrete and vibrate it to compact it, forming a precast ribbed bottom slab with a flat upper surface and longitudinal and transverse ribs on the lower surface. S2. A longitudinal expansion mold, a longitudinal adjustment module, a transverse expansion module, and a transverse adjustment module are prepared by injection molding, compression molding, or welding methods, with the upper surface being smaller than the lower surface and the side facade having a vertical arc-shaped recess. S3. Install a set of length adjustment modules at each of the two ends of the precast ribbed base plate, and install at least one set of expandable modules between the two sets of length adjustment modules. Each set of length adjustment modules includes a longitudinal adjustment module and two transverse adjustment modules symmetrically arranged on both sides of it. Each set of expandable modules includes a longitudinal expansion module and two transverse expansion modules symmetrically arranged on both sides of it, and longitudinal and transverse gap channels are formed between the adjacent modules. S4. Hoist the steel truss and place it into all the gaps and channels formed in step S3, and adjust the position of the steel truss to fix it. S5. Pour micro-expansion fine stone concrete or self-compacting concrete into all gaps and channels, and steam-cur or standard moisturizing curing is performed on the entire component after pouring. S6. After curing, demold the components and inspect their appearance, dimensions, and strength.

2. The modular forming method for a prefabricated integrated hollow floor slab component according to claim 1, characterized in that, The concrete poured and vibrated in step S1 has a slump of 120mm ± 20mm and a strength grade of not less than C30.

3. The modular forming method for a prefabricated integrated cavity floor slab component according to claim 2, characterized in that, After pouring and compacting the concrete in step S1, it is necessary to immediately cover and cure it, and let it stand until the compressive strength of the concrete reaches more than 70% of the design strength.

4. The modular forming method for a prefabricated integrated cavity floor slab component according to claim 1, characterized in that, The longitudinal expansion mold, longitudinal adjustment module, transverse expansion module, and transverse adjustment module are all trapezoidal hollow cavities, with a demolding angle of 3° to 8° and a curvature radius R of 30mm to 80mm for the arc-shaped recessed part on the side facade.

5. The modular forming method for a prefabricated integrated hollow floor slab component according to claim 4, characterized in that, The longitudinal expansion module, longitudinal adjustment module, lateral expansion module, and lateral adjustment module are made of polypropylene, ABS engineering plastic, galvanized steel plate, or aluminum alloy.

6. The modular forming method for a prefabricated integrated hollow floor slab component according to claim 1, characterized in that, The cross-section of the steel truss mentioned in step S4 is triangular or rectangular. The steel truss is also provided with a lifting point, and the web reinforcement of the steel truss that is fixedly connected to the lifting point is HPB300.

7. The modular forming method for a prefabricated integrated cavity floor slab component according to claim 6, characterized in that, The step S4 of adjusting the position of the steel truss for fixing specifically includes adjusting the position of the steel truss so that the height of its bottom from the overlapping surface of the precast ribbed base plate is 15mm±5mm, and binding or welding the lower chord steel bars or bottom connectors of the steel truss to the steel mesh in the precast ribbed base plate for fixing.

8. The modular forming method for a prefabricated integrated cavity floor slab component according to claim 1, characterized in that, In step S5, "pouring micro-expansion fine aggregate concrete or self-compacting concrete into all gap channels", the slump of the micro-expansion fine aggregate concrete is not less than 220mm, and the spread of the self-compacting concrete is 600mm±50mm.

9. A modular forming method for a prefabricated integrated cavity floor slab component according to claim 8, characterized in that, The strength grade of the micro-expansion fine aggregate concrete or self-compacting concrete is matched with or one grade higher than the strength grade of the precast ribbed base plate concrete.

10. A modular forming method for a prefabricated integrated cavity floor slab component according to any one of claims 1 to 9, characterized in that, When performing steam curing or standard moisturizing curing as described in step S5, the heating rate shall not exceed 15℃ / h, and the constant temperature shall be 50℃-65℃.

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