Building inner floor toilet plate descending construction formwork device
By using a combination of steel formwork and steel bar supports, the quality and efficiency problems in traditional floor bathroom drop-slab construction have been solved, achieving precise positioning, multiple turnovers, and low-cost construction results.
Patent Information
- Application Number
- CN202520368380.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Traditional methods for constructing bathroom slabs in multi-story buildings suffer from reduced bending strength and rigidity of wooden formwork, poor stability, susceptibility to damage, formwork floating, high labor intensity, high cost, and quality issues, which affect waterproofing performance and construction efficiency.
Steel formwork and steel reinforcement supports are used to assemble rectangular or rectangular shapes. Equipped with lifting rings and angle steel, and with internal steel reinforcement supports, the formwork is transported and disassembled as a whole by tower crane to ensure accurate positioning. The inner wall is coated with release agent to reduce labor and improve concrete density.
It improves the geometric accuracy and appearance quality of the lowered slab area, reduces water leakage rate, reduces material waste, saves costs, allows for quick and damage-free demolding, and enhances construction efficiency and waterproofing effect.
Smart Images

Figure CN223824586U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of building construction, especially to the building floor toilet drop plate construction formwork device. BACKGROUND
[0002] The local drop plate in building engineering is mainly used in rooms with water such as bathrooms, toilets and kitchens. Generally speaking, the drainage pipe of the current floor toilet will be pierced at the top plate of the lower floor, which is not conducive to decoration and is also unsightly. The purpose of the structural drop plate is to provide space for laying the drainage pipe, and the accumulated water at the drop plate position is discharged into the vertical pipe from the accumulated water discharger of the vertical pipe. In this way, the same floor drainage effect and aesthetic effect are achieved.
[0003] In the floor toilet drop plate formwork construction, the traditional construction method mainly relies on the on-site splicing of wooden forms and the use of stirrups or horizontal steel bars welded on the vertical steel bars of the beams (plates) to support the formwork of the drop plate. Although this construction method can meet the construction requirements to some extent, the quality problems it causes cannot be ignored.
[0004] Firstly, the wooden formwork is in contact with concrete for a long time during construction, which absorbs a large amount of water. This not only significantly reduces the bending strength and stiffness of the wooden formwork, but also makes the overall stability of the formwork worse. Since the wooden formwork is easily damaged, its damage becomes more serious after too many cycles. In addition, the bonding phenomenon between the wooden formwork and the concrete is also very common, and after the formwork is removed, quality problems such as pitted surface, holes, grout leakage, missing edges and corners, and excessive size deviation often occur. These problems not only affect the appearance of the cast-in-place structure, but also reduce its overall quality, causing great inconvenience to subsequent construction and use.
[0005] Secondly, the wooden formwork has a small self-weight and lacks reliable fixing measures, which makes it prone to formwork floating during concrete pouring. This not only cannot guarantee the consistency of the depth of the drop plate, but also may cause insufficient depth of the drop plate, thereby affecting the smooth progress of subsequent construction steps. Especially in the toilet area, which has very high waterproof requirements, insufficient depth of the drop plate will directly threaten the construction quality and effect of the waterproof layer, thereby increasing the risk of leakage and affecting the normal use of the toilet.
[0006] Furthermore, the traditional construction method also causes high labor intensity and high cost. Since the formwork needs to be set up and removed layer by layer, the labor intensity of the construction personnel increases significantly. At the same time, the wooden formwork has a limited number of cycles, and frequent replacement and repair also increase the construction cost. This not only reduces the construction efficiency, but also affects the overall economic benefit of the project.
[0007] In summary, the traditional floor toilet drop plate formwork construction method has many shortcomings, and a building floor toilet drop plate construction formwork device needs to be designed to solve the above problems. Utility Model Content
[0008] This utility model provides a formwork device for the construction of lowered slabs in bathrooms on floors within buildings, which solves the aforementioned technical problems.
[0009] To solve the above-mentioned technical problems, the present invention provides a formwork device for the construction of a drop slab in a bathroom on an interior floor, comprising a steel formwork and steel reinforcement supports. The steel formwork is processed into a combination of rectangular or rectangular shapes. Lifting rings are fixedly installed at the four corners of the top of the steel formwork. Angle steel is fixed at each of the four corners inside the steel formwork, and supporting steel bars are fixedly connected between two opposite angle steels. Multiple steel reinforcement supports are placed inside the steel formwork.
[0010] Preferably, the plurality of steel bar supports can support the concrete steel bar frame placed inside the steel formwork.
[0011] Preferably, the inner wall of the steel template is coated with a release agent layer.
[0012] Preferably, four lifting rings are provided, and the four lifting rings can be connected to steel cables and external cranes.
[0013] Compared with related technologies, the formwork device for lowering the floor slab of bathrooms in buildings provided by this utility model has the following beneficial effects:
[0014] This utility model provides a modular steel formwork that is processed and formed according to the dimensions of the lowered slab drawings. This avoids geometric deviations in the lowered slab area, improves the squareness and appearance quality of the concrete sidewalls in the lowered slab area, and uses a tower crane for hoisting and dismantling in one piece, reducing labor. The steel formwork material has good durability and can be reused multiple times, reducing material waste and saving costs. During the concrete pouring and vibration process in the lowered slab area, the vibrator and the steel formwork can resonate, increasing the density of the concrete and reducing the water leakage rate. A release agent layer is evenly brushed on the inner wall of the modular steel formwork, making the demolding process easy and quick, and less likely to damage the concrete surface. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall formwork device for the construction of the drop slab in the bathroom of an interior building, which is based on the present invention.
[0016] The following are the labels in the diagram: 1. Steel formwork; 11. Release agent layer; 2. Angle steel; 3. Lifting ring; 4. Supporting steel bars; 5. Steel bar supports. Detailed Implementation
[0017] Implementation examples, by Figure 1The following is provided: a formwork device for the construction of a drop slab in a bathroom on an inner floor of a building, including a steel formwork 1 and steel reinforcement supports 5. The steel formwork 1 is processed into a combination of rectangular or rectangular shapes. Lifting rings 3 are fixedly installed at the four corners of the top of the steel formwork 1. Angle steel 2 is fixed at each of the four corners inside the steel formwork 1. Supporting steel bars 4 are fixedly connected between two opposite angle steel bars 2. Multiple steel reinforcement supports 5 are placed inside the steel formwork 1.
[0018] Specifically, steel formwork 1 is fabricated according to the dimensions to form a corresponding size combination steel formwork 1, and angle steel 2 and supporting steel bars 4 are used to reinforce the formwork to ensure that the formwork will not deform or float during concrete pouring. By using the custom-made combination steel formwork 1, geometric deviations in the drop area can be avoided. The combination steel formwork 1 is hoisted to the predetermined position by a tower crane using lifting rings 3. By adjusting the connection between the lifting rings and the external crane, the formwork is ensured to be level and accurately positioned. Inside the steel formwork, a concrete reinforcement frame is erected according to the construction drawings. The reinforcement frame is supported by steel bar supports 5 to ensure that the reinforcement is accurately positioned and evenly spaced. After the reinforcement frame is erected, concrete is poured. During the pouring process, a vibrator can be used to vibrate the concrete. The vibration generated by the vibrator can easily resonate with the steel formwork, increasing the density of the concrete and reducing the leakage rate. After the concrete reaches the design strength, the combination steel formwork 1 can be lifted and dismantled by a tower crane, reducing the amount of manual labor required for formwork removal.
[0019] In this embodiment, multiple steel bar supports 5 can support the concrete steel bar frame placed inside the steel formwork 1. The concrete steel bar frame is erected inside the steel formwork according to the construction drawings. The steel bar supports 5 are used to support the steel bar frame to ensure that the position of the steel bars is accurate and the spacing is uniform.
[0020] In this embodiment, the inner wall of the steel formwork 1 is coated with a release agent layer 11; the release agent layer 11 is evenly coated on the inner wall of the combined steel formwork 1 before concrete pouring, making the subsequent demolding process easy and quick, and less likely to damage the concrete surface.
[0021] In this embodiment, four lifting rings 3 are provided. The four lifting rings 3 can be connected to steel cables and external cranes. The combined steel formwork 1 is transported and disassembled in one piece by tower crane, reducing the amount of manual labor required.
[0022] Working principle:
[0023] Preparation: Determine the location and dimensions of the lowered slab according to the construction drawings and requirements. Then, fabricate steel formwork 1 according to the dimensions to form a corresponding combination steel formwork 1, and reinforce the formwork with angle steel 2 and supporting steel bars 4 to ensure that the formwork will not deform or float when pouring concrete. By using the custom-made combination steel formwork 1, geometric deviations in the lowered slab area can be avoided.
[0024] Template installation: The combined steel template 1 is lifted and transported to the predetermined position by the tower crane using lifting ring 3. The connection between the lifting ring and the external crane is adjusted to ensure that the template is level and in the correct position.
[0025] Rebar scaffolding erection: Concrete rebar scaffolding is erected inside the steel formwork according to the construction drawings. Rebar supports are used to support the rebar scaffolding, ensuring accurate rebar positioning and uniform spacing.
[0026] Concrete pouring: After the steel reinforcement frame is erected, a release agent layer 11 is evenly brushed onto the inner wall of the combined steel formwork 1 before concrete pouring. During the pouring process, a vibrator can be used to vibrate the concrete. The vibration generated by the vibrator can easily resonate with the steel formwork, increasing the density of the concrete and reducing the leakage rate.
[0027] Formwork Removal: After the concrete reaches the design strength, the combined steel formwork 1 can be lifted and dismantled by a tower crane, reducing the amount of manual labor required for formwork removal. Moreover, since the inner wall of the steel formwork is coated with a release agent layer 11, the formwork removal process is easy and quick, and is less likely to damage the concrete surface.
[0028] Subsequent construction: After the formwork is removed, the waterproofing layer and other follow-up work are carried out in the lowered slab area. The stability and accurate dimensions of the lowered slab structure provide a strong guarantee for subsequent construction.
[0029] In summary, in this application, the combined steel formwork 1 is transported and disassembled entirely by tower crane, reducing the amount of manual labor. The combined steel formwork 1 is processed and formed according to the dimensions of the lowered slab drawings, which can avoid geometric deviations in the lowered slab area, improve the squareness and appearance quality of the concrete sidewalls in the lowered slab area, and the steel formwork 1 has good material durability and can be reused multiple times, reducing material waste and saving costs. During the concrete pouring and vibration process in the lowered slab area, the vibrator and the steel formwork can resonate, increasing the density of the concrete and reducing the water leakage rate. The release agent layer 11 is evenly brushed on the inner wall of the combined steel formwork 1, making the demolding process easy and quick, and less likely to damage the concrete surface.
Claims
1. A formwork device for the construction of a drop slab in a bathroom on an interior floor of a building, comprising a steel formwork (1) and steel reinforcement supports (5), characterized in that: The steel template (1) is processed into a combination of rectangles or rectangular shapes. The top four corners of the steel template (1) are fixed with lifting rings (3). Angle steel (2) is fixed at each of the four corners of the steel template (1). Supporting steel bars (4) are fixedly connected between the two opposite angle steels (2). Multiple steel bar stools (5) are placed inside the steel template (1).
2. The formwork device for lowering the floor slab of a bathroom in a building according to claim 1, characterized in that, The multiple steel bar supports (5) can support the concrete steel bar frame placed inside the steel formwork (1).
3. The formwork device for lowering the floor slab of a bathroom in a building according to claim 1, characterized in that, The inner wall of the steel template (1) is coated with a release agent layer (11).
4. The formwork device for lowering the floor slab of a bathroom in a building according to claim 1, characterized in that, The lifting ring (3) is provided in four parts, and the four lifting rings (3) can be connected to the steel cable and the external crane.