Floor lowering plate detachable combined standardization device

Abstract

This invention provides a detachable and modular formwork device for lowered floor slabs in kitchens and bathrooms to improve the quality and construction efficiency. The device includes two L-shaped rigid metal components connected at their ends by a detachable structure to form a rectangular frame. The outer wall and bottom surface of the rectangular frame are smooth planes. It also includes a support frame for supporting the rectangular frame, comprising at least three support legs. At least one support leg connects to a bottom template, and the top of each support leg is connected to a horizontal support beam for supporting the rectangular frame and a positioning structure for limiting the horizontal displacement of the rectangular frame. The detachable and modular formwork device for lowered floor slabs provided by this invention is not only reusable and energy-saving, but also allows for convenient assembly and disassembly, and effectively improves the precision of the finished lowered floor slab.

Description

Technical Field

[0001] This utility model relates to the technical field of floor drop slabs, and in particular to a detachable and modularized floor drop slab device. Background Technology

[0002] In recent years, with the rapid development of the construction industry, some traditional construction methods can no longer meet people's requirements for construction quality. The increasingly higher quality of construction products has prompted the improvement of traditional construction techniques, and construction methods have become more and more advanced, simple and practical. For example, wall and column formwork has changed from the original traditional wooden formwork to more refined aluminum formwork. However, there are still many problems in the more complicated formwork support process for some lowered floor areas such as kitchens and bathrooms. Lowering the floor slab refers to reducing the structural elevation of the floor slab or roof slab, which is usually used in rooms with water such as bathrooms and kitchens to prevent water from seeping into other areas.

[0003] The processing and installation of traditional wooden formwork generates formwork waste and sawdust dust. During concrete pouring, the wooden formwork deforms and expands, and debris gets trapped during formwork removal. Controlling the quality of the finished product and subsequent construction and maintenance also contribute to dust pollution, which is detrimental to energy conservation and environmental protection. Furthermore, the processing of traditional wooden formwork is complex, and product quality is easily limited by worker skills, resulting in poor repair outcomes. The non-removable square steel formwork also hinders construction efficiency.

[0004] Therefore, improving the quality of finished kitchen and bathroom recessed slabs and increasing construction efficiency are urgent technical issues that need to be addressed.

[0005] It should be noted that the above technical information is intended only to enhance the understanding of the overall background technology of this utility model, and should not be regarded as an admission or in any form implying that the above technical information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes a detachable and modular prefabricated device for lowering floor slabs. The technical problem to be solved is: how to improve the quality of finished lowered floor slabs in kitchens and bathrooms and increase construction efficiency.

[0007] The technical solution of this utility model is as follows: A detachable and modular floor slab lowering device includes two L-shaped rigid metal components connected to form a rectangular frame via a detachable structure at their ends. The outer wall and bottom surface of the rectangular frame are smooth planar structures. The device also includes a support frame for supporting the rectangular frame. The support frame includes at least three support legs, at least one of which is used to connect to the bottom template. The top of the support leg is connected to a horizontal support beam for supporting the rectangular frame and a positioning structure for limiting the horizontal displacement of the rectangular frame. This technical solution provides a modular formwork device, mainly used for the formwork construction of floor drop slabs. The dimensions of two rigid metal components are selected according to the size of the floor drop slab. These two rigid metal components are then assembled into a rectangular frame using a detachable structure. The outer wall of the rectangular frame serves as the casting template for the floor drop slab step surface. Therefore, the elevation and horizontal positioning of the rectangular frame are crucial. This technical solution also provides a reliable and height-adjustable support frame. The bottom of the support frame is fixedly connected to the bottom template below. The horizontal support beam in the support frame controls the elevation of the rectangular frame, and the positioning structure defines the horizontal position of the rectangular frame. By using support frames of different heights or adjusting the height of the support frame, the elevation and horizontal positioning of the rectangular frame can be achieved.

[0008] Based on the above technical solutions, the preferred technical solution for the detachable and modular prefabricated device for floor slab drop is that the rigid metal component is square steel or angle steel. This technical solution provides two preferred rigid metal components: square steel and angle steel. Square steel and angle steel are not only readily available locally, but also possess sufficient rigidity and relatively smooth surfaces, facilitating the forming and demolding of the floor slab drop surface. Using angle steel reduces steel consumption, and the entire modular prefabricated device is lightweight, facilitating transportation, installation, and disassembly. During use, the external angle of the angle steel faces outwards while the internal angle faces inwards, meaning the internal angle of the angle steel is away from the floor slab drop surface. While using square steel requires more steel and is heavier than angle steel, it offers greater rigidity and eliminates the need to select specific structural surfaces; all structural surfaces of the square steel can serve as the contact surface for the floor slab drop surface.

[0009] Based on the above technical solutions, as a preferred technical solution for a detachable and modular prefabricated device for floor slab lowering, the detachable structure includes a connecting hole at one end of a rigid metal component and a connecting column at the other end. This technical solution provides a preferred implementation of the detachable structure, enabling efficient assembly and disassembly of the rectangular frame through a simple structural design. During assembly, the connecting hole at one end of the first rigid metal component mates with the connecting column at one end of the second rigid metal component, and the connecting hole at the other end of the second rigid metal component mates with the connecting column at the other end of the first rigid metal component.

[0010] Based on the above technical solutions, as a preferred technical solution for a detachable and modular modular device for floor slab lowering, the connecting column is a bolt column, and a locking nut is connected to one end of the bolt column that passes through the connecting hole. This technical solution provides a preferred detachable structure, using a bolt column as the connecting column and adding a locking nut. When the bolt column is inserted into the connecting hole, it can be tightened by the locking nut, fully ensuring the connection reliability of the two rigid metal components.

[0011] Based on the above technical solutions, as a preferred technical solution for a detachable and modularized floor slab lowering device, the connecting hole is opened on the extension piece, the extension piece is connected to one end of the rigid metal component and located at the top of the rigid metal component, and the connecting column is located at the top of the other end of the rigid metal component.

[0012] Based on the above technical solutions, as a preferred technical solution for the detachable and modularized floor slab lowering device, the support frame includes three support legs, two of which are formed by bending a steel bar, and the other support leg, horizontal support beam, and positioning structure are formed by bending a steel bar, with the two steel bars welded together.

[0013] Based on the above technical solutions, as a preferred technical solution for a detachable and modularized floor slab lowering device, the two support legs formed by bending a single steel bar are symmetrical to each other.

[0014] Based on the above technical solutions, the preferred technical solution for the detachable and modularized floor slab lowering device is that the support leg, which is formed by bending a steel bar together with the horizontal support beam and the positioning structure, is located in the vertical plane of the other two support legs.

[0015] Based on the above technical solutions, as a preferred technical solution for the detachable and modularized floor slab lowering device, the positioning structure includes a vertical section perpendicular to the horizontal support beam, and the upper end of the vertical section is bent downward to form an anchoring section that is away from the horizontal support beam.

[0016] Based on the above technical solutions, as a preferred technical solution for the detachable and modularized floor slab lowering device, the lower end of each support leg is bent with a horizontal support foot. The horizontal support foot is a flattened sheet structure, and a positioning hole for connecting the bottom template is provided on the horizontal support foot.

[0017] Compared with the prior art, the detachable and modular floor slab lowering device provided by this utility model has the following advantages: 1. Improved the precision of the finished product with the lowered plate. This device can prevent the wooden mold from expanding due to the pressure of concrete, which can cause the lines to bend and deform after dismantling. It can greatly reduce the size error of the finished product and reduce the amount of maintenance work and cost in the later stage. The support frame is height adjustable to accurately control the elevation of the lowered plate.

[0018] 2. Recyclable, energy-saving and environmentally friendly This device uses two-section combined square steel as the drop plate template, and uses screws to connect and install the template. The square steel template can be used far more frequently than the wooden template, which greatly reduces the consumption of wooden templates, reduces the use of template processing tools, reduces on-site construction noise, reduces dust emissions, and reduces the amount of subsequent maintenance work, thus achieving the goal of reducing costs and increasing efficiency for the project.

[0019] 3. Easy assembly and disassembly This device uses a combination of two-section square steel and screw connection to adapt to different sizes of formwork. It can be flexibly installed according to the size of the lowered slab in the kitchen and bathroom. After the concrete is poured, the formwork can be dismantled in sections, which is not easy to damage the lowered slab and significantly improves the quality of the finished lowered slab. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a top view of the rectangular frame structure. Figure 2 for Figure 1 A schematic diagram of the structure at one end of a medium-rigidity metal component; Figure 3 for Figure 1 Schematic diagram of the other end of the medium-rigidity metal component; Figure 4 This is a schematic diagram of the support frame.

[0022] Explanation of icon numbers: Rigid metal component 1; Rectangle 2; Support frame 3, support leg 31, horizontal support beam 32, positioning structure 33; Horizontal support foot 311, positioning hole 312; Vertical section 331, anchorage section 332; Detachable structure 4, extension piece 40, connecting hole 41, connecting post 42, locking nut 43. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0025] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0027] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0028] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] A detachable and modular modular device for lowering floor slabs is available, suitable for the main construction of kitchen and bathroom floors in various civil and public buildings where lowered floor slabs are used. Figures 1 to 4 As shown, it includes two L-shaped rigid metal components 1, which are connected to form a rectangular frame 2 by a detachable structure 4 between their ends. The outer wall and bottom surface of the rectangular frame are smooth planar structures.

[0031] The device also includes a support frame 3 for supporting the rectangular frame 2. The support frame 3 includes at least three support legs 31, at least one of which is used to connect to the bottom formwork. The top of the support leg 31 is connected to a horizontal support beam 32 for supporting the rectangular frame 2 and a positioning structure 33 for limiting the horizontal displacement of the rectangular frame 2. Before pouring concrete, the support frame 3 is first fixed to the bottom formwork, which is the pouring base plate for the entire floor. It is a wooden formwork structure and can be fixed to the wooden formwork with steel nails to position the support frame 3. Then, the rectangular frame 2 is placed above the horizontal support beams 3 of each support frame 3, wherein the positioning structure is in contact with the outer wall of the rectangular frame 2. Then, concrete is poured, and the support frame 3 is embedded in the concrete. The outer wall of the rectangular frame 2 is the contact surface of the floor slab drop step.

[0032] This embodiment provides a modular shaping device, mainly used for the shaping construction of floor drop slabs. The dimensions of two rigid metal components 1 are selected according to the size of the floor drop slab. The two rigid metal components 1 are then assembled into a rectangular frame 2 via a detachable structure. The outer wall of the rectangular frame 2 serves as the casting template for the floor drop slab step surface. Therefore, the elevation and horizontal positioning of the rectangular frame 2 are crucial. This embodiment also provides a reliable and height-adjustable support frame 3. The bottom of the support frame 3 is fixedly connected to the bottom template below. The horizontal support beam 32 in the support frame 3 controls the elevation of the rectangular frame 2, and the positioning structure 33 defines the horizontal position of the rectangular frame 2. By using support frames 3 of different heights or adjusting the height of the support frame 3, the elevation and horizontal positioning of the rectangular frame 2 can be achieved.

[0033] Furthermore, this embodiment provides a detachable and modular prefabricated device, which facilitates transportation, hoisting, reinforcement, and disassembly, and eliminates the inconvenience of overall hoisting and installation, as well as the risk of damage to sharp edges during disassembly. The main material used for the prefabricated mold, square steel, has excellent rigidity, strength, and recyclability. The square steel is cut according to the design dimensions and then welded according to the design drawings of the connection parts to form a drop plate mold. During construction, it is installed and fixed on-site, and the elevation is controlled by prefabricated triangular steel reinforcement supports at the four corners of the mold.

[0034] Design and fabrication of standardized mold devices. Based on the construction design drawings, determine the type, length, and other dimensional parameters of the drop slabs in the kitchens and bathrooms of each building in advance. Design standardized devices based on these parameters, generate processing drawings, and arrange personnel for fabrication.

[0035] The construction process using this device is as follows: Key points of construction operation: 1. Review the drawings and record the shape and dimensional parameters of the lowered plate. Examine the shape of the drop plate on the architectural design drawings, record the dimensional and elevation parameters, and design a standardized device based on the parameters.

[0036] 2. Design of the standardization device and support frame Based on the location, shape, and dimensions of the kitchen and bathroom in the building's structural drawings, the drop plate mold is designed, and a support frame suitable for the mold is designed.

[0037] The standardization device is assembled from two sections of L-shaped square steel, and the connection is fixed with screws and nuts; the support frame around the device is made of triangular steel bars to ensure the accuracy of the position, elevation, and size of the finished product mold.

[0038] 3. Material Selection When square timber is used as formwork for drop slabs, concrete easily adheres to its surface after pouring, making the drop slabs highly susceptible to damage after formwork removal, thus affecting project quality. Furthermore, square timber readily absorbs water and expands, leading to a decline in its quality and requiring frequent replacement, resulting in significant material waste. Square steel, on the other hand, possesses excellent strength and rigidity, is not easily deformed, and has a very high recycling rate, allowing for recycling after a single processing step. Therefore, square steel is chosen as the material for the standardized formwork.

[0039] 4. Processing and fabrication and dimensional verification The prefabricated kitchen and bathroom lowering panel device is assembled from two L-shaped square steel (angle steel) sections. The prefabricated device is made of 4cm×4cm square steel (angle steel) of a certain standard, which is processed and assembled into an L-shape. The square steel (angle steel) at the L-shaped corners is welded to the inner side at a 45° bevel to form a whole. Inspect the completed prefabricated device, measure the length and length of the long side, and measure the verticality, flatness, and corners of the mold for defects.

[0040] 5. Mold installation and positioning verification During mold installation, the holes in the protruding steel plates at the short end of the first L-shaped mold section are fitted with the bolts welded to the long end of the second mold section, and then the matching nuts are tightened. The square steel sections at the diagonals are treated in the same way, so that the two L-shaped mold sections are combined into a whole. A prefabricated triangular steel reinforcement frame is installed every 800mm at the bottom of the square steel (angle steel), and the square steel (angle steel) is fixed to the surrounding beam reinforcement with tie wire. The elevation of the mold is controlled by adjusting the support frame. Afterwards, the positioning is checked, the flatness of the mold is adjusted, the height is adjusted, and the elevation is determined. The accuracy of the mold installation position is determined by setting up a theodolite, and the elevation of the mold installation is tested by setting up a level to ensure it meets the requirements.

[0041] 6. Concrete pouring Before pouring concrete, apply release agent to the side of the square steel (angle steel) facing the concrete surface. Avoid excessive disturbance during the concrete pouring process and take care to protect the bolts and nuts. After the concrete pouring is completed, ensure that the surface of the plate is flush with the upper surface of the mold.

[0042] 7. Removal of the standardization device After the concrete has hardened, first use a wrench to remove the nuts, then use a pry bar to gently disturb the shaping device, and then disassemble the L-shaped shaping device in sequence; clean the residual mortar on the mold, and apply a release agent to the mold for maintenance, so as to facilitate subsequent use.

[0043] 8. Curing of finished floor slabs After the molding device is removed, the lowered slab is water-cured. Curing is completed when the slab reaches 100% strength. The finished lowered slab has no missing edges or corners, the elevation meets the design requirements, the inside and outside corners are straight and aesthetically pleasing, and there are no quality defects such as mold bulging or slurry leakage.

[0044] 9. Welding quality control (1) Welding materials shall meet the design requirements and relevant standards.

[0045] (2) Welders must pass the examination. Check the welder's certificate of qualification for the corresponding welding conditions and the date of the examination.

[0046] (3) The surface of Class I and II welds shall not have quality defects such as cracks, weld beads, burn-through, arc craters, etc. Class II welds shall not have defects such as surface porosity, slag inclusions, arc craters, cracks, arc scratches, etc., and Class I welds shall not have quality defects such as undercut, incomplete welding, etc.

[0047] (4) Weld appearance: The weld is uniform in shape, the transition between weld beads and between weld beads and base metal is smooth, and the slag and spatter are cleaned.

[0048] (5) When welding parts are aligned, the inner walls should be flush. If there is misalignment, the local misalignment value of single-sided welding should not exceed 10% of the wall thickness and should not be greater than 1mm; the local misalignment value of double-sided welding should not exceed 10% of the thickness of the weldment and should not be greater than 3mm.

[0049] (6) The welder must have complete tools and equipment. During the welding process, whether it is the weld joint or the weld seam, it must be cleaned layer by layer. If there are defects or sticky welding rods (wires), they must be removed.

[0050] 10. Quality Control Standards for Standardization Equipment (1) Quality inspection of finished products processed by the standardization device 1) The short and long sides of the L-shaped mold of the standardization device are perpendicular to each other to 90°; the short and long sides of the L-shaped square steel are on the same horizontal plane and no angular deviation occurs in the horizontal direction.

[0051] 2) The long and short sides of the L-shaped shaping device are straight and not bent or twisted.

[0052] 3) The diameter of the round hole in the short side of the L-shaped mold should match the diameter of the screw, and the hole position should not be offset.

[0053] (2) Quality inspection of standardized equipment construction 1) The flatness deviation of the standardized installation device during construction should not exceed 5mm. The wire binding should be used to ensure firmness and avoid disturbing the mold, which would lead to a decrease in the quality of the finished product.

[0054] 2) The height of the support frame should be calculated and determined according to the drop plate elevation required by the drawings. During the installation process, the support frame should be kept at the same horizontal height, and the range should be controlled within 5mm.

[0055] 3) The installation position of the standardization device shall be strictly constructed in accordance with the lowering plate position in the drawings.

[0056] 4) When the prefabricated device is tied to the beam and slab reinforcement, it should be tied firmly to avoid disturbing the mold during concrete pouring and affecting the quality of the finished product.

[0057] 11. Quality inspection of the finished product with lowered plates (1) The deviation of the sinking height of the lower plate is less than 5mm.

[0058] (2) The deviation of the long side and short side dimensions of the lower plate is controlled within 1~2mm.

[0059] (3) The side of the lower plate should not be curved, and there should be no missing edges or corners.

[0060] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the rigid metal component 1 is square steel or angle steel.

[0061] This embodiment provides two preferred rigid metal components 1: square steel and angle steel. Square steel and angle steel are not only readily available locally, but also possess sufficient rigidity and relatively smooth surfaces, facilitating the forming and demolding of the floor drop slab step surface. Using angle steel reduces steel consumption, and the entire modular assembly is lightweight, facilitating transport, installation, and disassembly. During use, the external angle of the angle steel faces outwards while the internal angle faces inwards, meaning the internal angle of the angle steel is away from the floor drop slab step surface. While square steel uses more steel and is heavier than angle steel, it offers greater rigidity, and no specific structural surface needs to be selected; all structural surfaces of the square steel can serve as the contact surface for the floor drop slab step surface.

[0062] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the detachable structure 4 includes a connecting hole 41 at one end of a rigid metal component 1 and a connecting column 42 at the other end.

[0063] This embodiment provides a preferred implementation of the detachable structure 4, which achieves efficient assembly and disassembly of the rectangular frame through a simple structural design. During assembly, the connecting hole 41 at one end of the first rigid metal component 1 is adapted to the connecting post 42 at one end of the second rigid metal component 1, and the connecting hole 41 at the other end of the second rigid metal component 1 is adapted to the connecting post 42 at the other end of the first rigid metal component 1.

[0064] Based on the above embodiments, in a preferred embodiment of the detachable and modular floor slab lowering device, the connecting column 42 is a bolt column, and a locking nut 43 is connected to one end of the bolt column that passes through the connecting hole 41. This embodiment provides a preferred detachable structure, using a bolt column as the connecting column 42 and adding a locking nut 43. When the bolt column is inserted into the connecting hole 41, it can be tightened by the locking nut 43, fully ensuring the connection reliability of the two rigid metal components 1.

[0065] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the connecting hole 41 is opened on the extension piece 40, the extension piece 40 is connected to one end of the rigid metal component 1 and located at the top of the rigid metal component 1, and the connecting column 42 is located at the top of the other end of the rigid metal component 1.

[0066] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the support frame 3 includes three support legs 31, two of which are formed by bending a steel bar, and the other support leg 31, the horizontal support beam 32, and the positioning structure 33 are formed by bending a steel bar, with the two steel bars welded together.

[0067] Based on the above embodiments, in a preferred embodiment of the detachable and modularized floor slab lowering device, the two support legs 31 formed by bending a steel bar are symmetrical to each other.

[0068] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the support leg 31, which is formed by bending a steel bar together with the horizontal support beam 32 and the positioning structure 33, is located in the vertical plane of the other two support legs 31.

[0069] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the positioning structure 33 includes a vertical section 331 perpendicular to the horizontal support beam 32, and the upper end of the vertical section 331 is bent downward to form an anchoring section 332 that is away from the horizontal support beam 32.

[0070] Based on the above embodiments, as a preferred embodiment of the detachable and modularized floor slab lowering device, the lower end of each support leg 31 is bent with a horizontal support foot 311. The horizontal support foot 311 is a flattened sheet structure. The horizontal support foot 311 is provided with a positioning hole 312 for connecting the bottom template. The horizontal support foot 311 can be connected to the bottom template by steel nails that are compatible with the positioning hole 312.

[0071] This technical solution has good benefits. Social benefits 1. The standardized device adopts a two-stage combination, which is convenient for assembly and disassembly, resulting in a good appearance and quality of the finished product. It improves construction efficiency, reduces maintenance costs, and provides a new way for technological innovation in the construction industry.

[0072] 2. Reduce the processing and use of wooden formwork, lower the cost of chiseling and repairing the lowered boards, reduce dust pollution, and avoid the generation of a large amount of construction waste.

[0073] 3. The successful implementation of this construction method in the project resulted in excellent construction quality, optimized construction process, and unanimous praise from the workers.

[0074] Economic benefits In a certain resettlement housing project, buildings 1-9 in Phase I and buildings 1-8 in Phase II both adopted the construction method of detachable and modular modular devices. The original method used wooden molds for lowering the slabs, resulting in a repair rate of 50%. After using the innovative and improved modular devices, the repair rate can be controlled to 5% or less. The repair rate for lowering the slabs of the 8 buildings in Phase I was 5%, and the repair rate for lowering the slabs of the 7 buildings in Phase II was 3%.

[0075] 1. Phase I 1) The cross-sectional size of the square timber used on site is 45mm×95mm. Each unit requires 0.256m3 of square timber, and each floor requires 0.513m3. There are 8 buildings in the first phase of the site, each with 26 floors. Each building needs to be replaced 9 times. The price of square timber is 1800 yuan / m3. The cost of square timber is 0.513×9×8×1800=66484.8 yuan.

[0076] 2) Cost of using square steel: Square steel is a material that is transferred on site and is not included in the cost calculation.

[0077] 3) Maintenance costs: Manual maintenance costs 2 workers per floor per day, with each repairman costing 400 yuan; the maintenance rate using square timber is calculated at 50%, resulting in a maintenance cost of 2 × 400 × 26 × 50% × 8 = 83,200 yuan; the maintenance cost using standardized equipment is 2 × 400 × 26 × 5% × 8 = 8,320 yuan; the cost savings are 83,200 - 8,320 = 74,880 yuan.

[0078] 4) Cost savings in Phase 1: 66484.8 + 74880 = 141364.8 yuan 2. Phase II 1) The cross-sectional size of the square timber used on site is 45mm×95mm. Each unit requires 0.256m3 of square timber, and each floor requires 0.513m3. There are 7 buildings in the second phase of the site. 2 buildings are 30 stories high, and each building needs to be replaced 10 times. 5 buildings are 33 stories high, and each building needs to be replaced 11 times. The price of square timber is 1800 yuan / m3. The cost of square timber is 0.513×10×2×1800+0.513×11×5×1800=69255 yuan.

[0079] 2) Cost of using square steel: Square steel is a material that is transferred on site and is not included in the cost calculation.

[0080] 3) Maintenance costs: Manual maintenance costs 2 workers per floor per day, with each repairman costing 400 yuan; using square timber, the maintenance rate is calculated at 50%, resulting in a maintenance cost of 2×400×30×50%×2+2×400×33×50%×5=90000 yuan; using standardized equipment, the maintenance cost is 2×400×30×3%×2+2×400×33×3%×5=5400 yuan; the savings are 90000-5400=84600 yuan.

[0081] 4) Cost savings in Phase II: 69255 + 84600 = 153855 yuan 3. Summary Based on the above cost calculations, the total cost savings for Phase I and Phase II amounted to 141,364.8 + 153,855 = 295,220 yuan.

[0082] Application Examples This device was implemented in Phase I and Phase II of a resettlement housing project. It involved installing standardized formwork for the kitchen and bathroom lowered slabs, followed by concrete pouring. Phase I has a total construction area of ​​approximately 260,000 m², comprising 8 residential buildings, with the main building having 26 floors above ground. Phase II has a total construction area of ​​approximately 200,000 m², comprising 7 residential buildings, with 2 main buildings having 30 floors above ground and 5 main buildings having 33 floors above ground. All main buildings in both Phase I and Phase II utilized the detachable and modular standardized lowered slab construction method.

[0083] This construction method eliminates the need for frequent mold processing, allowing for the erection of standardized drop-plate templates, reducing the consumption of wooden molds, sawdust and dust generation, and noise. It is energy-saving and environmentally friendly, and easy to assemble and disassemble. Once made, it can be reused, making it highly practical. The support frame structure is simple, allowing for precise control of the drop-plate elevation and convenient construction. Therefore, it has great value for use and promotion.

[0084] Finally, it should be noted that the parts not described in detail in the above embodiments are all common knowledge known to those skilled in the art.

[0085] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular, detachable, and modular device for lowering floor slabs, characterized in that: It includes two L-shaped rigid metal components (1), which are connected to form a rectangular frame (2) by a detachable structure (4) between their ends. The outer wall and bottom surface of the rectangular frame are smooth planar structures. It also includes a support frame (3) for supporting the rectangular frame (2). The support frame (3) includes at least three support legs (31). At least one support leg (31) is used to connect to the bottom template. The top of the support leg (31) is connected to a horizontal support beam (32) for supporting the rectangular frame (2) and a positioning structure (33) for limiting the horizontal displacement of the rectangular frame (2).

2. The floor lowering plate detachable combination sizing device according to claim 1, characterized in that: The rigid metal component (1) is a square steel or an angle steel.

3. The floor lowering plate detachable combination type sizing device according to claim 1 or 2, characterized in that: The detachable structure (4) includes a connecting hole (41) at one end of a rigid metal component (1) and a connecting post (42) at the other end.

4. The floor lowering plate detachable combination sizing device according to claim 3, characterized in that: The connecting post (42) is a bolt post, and a locking nut (43) is connected to one end of the bolt post that passes through the connecting hole (41).

5. The floor lowering plate detachable combination sizing device according to claim 4, characterized in that: The connecting hole (41) is opened on the extension piece (40), the extension piece (40) is connected to one end of the rigid metal member (1) and located at the top of the rigid metal member (1), and the connecting post (42) is located at the top of the other end of the rigid metal member (1).

6. The floor lowering plate detachable combination sizing device according to any one of claims 1 to 5, characterized in that: The support frame (3) includes three support legs (31), two of which are formed by bending a steel bar, and the other support leg (31), horizontal support beam (32), and positioning structure (33) are formed by bending a steel bar. The two steel bars are welded together.

7. The floor lowering plate detachable combination sizing device according to claim 6, characterized in that: The two supporting legs (31) formed by bending a steel bar are symmetrical to each other.

8. The detachable and modular floor slab lowering device according to claim 7, characterized in that: The support leg (31), which is formed by bending a steel bar together with the horizontal support beam (32) and the positioning structure (33), is located in the vertical plane of the other two support legs (31).

9. The floor lowering plate detachable combination type sizing device according to claim 6 or 7, characterized in that: The positioning structure (33) includes a vertical section (331) perpendicular to the horizontal support beam (32), and the upper end of the vertical section (331) is bent downward to form an anchoring section (332) that is away from the horizontal support beam (32).

10. The floor lowering plate detachable combination sizing device according to claim 9, characterized in that: The lower ends of the support legs (31) are all bent with horizontal support feet (311). The horizontal support feet (311) are flattened sheet structures, and positioning holes (312) for connecting the bottom template are opened on the horizontal support feet (311).

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