Reinforced concrete dense rib floor and construction method thereof

Abstract

The application relates to the technical field of building construction, and discloses a reinforced concrete dense-rib floor and a construction method thereof, which comprises a formwork, support assemblies are arranged on the upper part of the formwork and on the front and back sides, two grouting sleeves are used to connect the two support assemblies, a plurality of floor cover assemblies are arranged on the upper part of the formwork and are distributed along the gaps between the two support assemblies, a pouring plate is arranged on the upper parts of the two support assemblies, the pouring plate is formed by pouring concrete, the floor cover assembly comprises a dense-rib floor cover arranged on the upper part of the formwork, a guide plate is arranged at the bottom of the inner cavity of the dense-rib floor cover, sliding holes are arranged in the upper part of the guide plate, a threaded rod is arranged at the central position of the upper part of the guide plate, the lower part of the threaded rod penetrates through the guide plate and is provided with a rocker, a moving sleeve is arranged on the outer surface of the threaded rod, the outer surface of the moving sleeve and the inner cavities of the five sliding holes are jointly provided with unfolding mechanisms, a top plate is arranged on the upper parts of the five unfolding mechanisms, and a limiting plate is arranged on the upper part of the threaded rod.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a reinforced concrete ribbed floor slab and its construction method. Background Technology

[0002] Currently, in the field of building engineering, ribbed floor slabs are widely used in large-span, large-space industrial and civil buildings due to their light weight, excellent load-bearing capacity, and high space utilization, becoming one of the important choices in modern building structural design.

[0003] The traditional construction process of ribbed floor slabs usually follows the process of "formwork erection - formwork cover fixing - rebar binding - concrete pouring - formwork removal - formwork cover removal". That is, the formwork cover is fixed on the erected formwork to form the ribbed groove. After the concrete is poured and cured, the formwork and formwork cover are removed in sequence to finally form the ribbed structure.

[0004] However, the removal of rib covers during the construction of existing ribbed floor slabs is cumbersome and poses serious safety hazards. Traditional formwork covers are mostly integral fixed structures. After the concrete has hardened, workers need to use tools such as pry bars to forcibly pry the formwork covers out of the concrete. This is not only laborious and inefficient, but the formwork covers are also prone to instability and falling during the prying process, which can easily cause injuries to construction workers below. At the same time, violent removal can also cause quality problems such as cracking and chipping at the edges of the concrete grooves, affecting the appearance and structural integrity of the floor slab. In addition, the on-site reinforcement binding and concrete pouring work is extensive and the construction period is long. Pipeline laying requires additional trenching, which can damage the structure and pose a risk of leakage.

[0005] Therefore, there is an urgent need for a new type of ribbed floor structure that combines the advantages of easy demolition, efficient construction, and structural safety. Summary of the Invention

[0006] This application provides a reinforced concrete ribbed floor slab and its construction method. The first problem to be solved is that the removal of the formwork in the existing ribbed floor slab construction is cumbersome and poses a great safety hazard. The second problem is that the removal of the formwork in the existing ribbed floor slab construction is prone to damaging the structure, has a long construction period, and causes damage to the structure when laying pipelines.

[0007] To solve the above-mentioned technical problems, this application provides a reinforced concrete ribbed floor slab, including: a template, with support components on both the front and rear sides of the upper part of the template, two support components connected by two grouting sleeves, and a number of floor slab components distributed along the gap between the two support components on the upper part of the template, and a casting slab on the upper part of the two support components, the casting slab being formed by concrete pouring.

[0008] Furthermore, the support assembly includes a grid-shaped rib beam, with several reinforcing bars inside the rib beam, and a rectangular channel for laying power and low-voltage cables is formed in the middle of the outer surface of the rib beam.

[0009] Furthermore, the inner cavity of the rectangular channel is filled with expanding fireproof mortar.

[0010] Furthermore, the floor slab assembly includes a ribbed floor slab disposed on the upper part of the template. A guide plate is provided at the bottom of the inner cavity of the ribbed floor slab. Sliding holes are provided at the five corners of the upper part of the guide plate. A threaded rod is provided at the center of the upper part of the guide plate. The lower part of the threaded rod passes through the guide plate and is provided with a rocker arm. A movable sleeve is provided on the outer surface of the threaded rod. An unfolding mechanism is provided on the outer surface of the movable sleeve and the inner cavities of the five sliding holes. A top plate is provided on the upper part of the five unfolding mechanisms. A limiting plate is provided on the upper part of the threaded rod.

[0011] Furthermore, the inner cavity of the movable sleeve is provided with an internal thread that matches the threaded rod. When the threaded rod is driven to rotate by the rocker arm, the movable sleeve moves upward, causing the five unfolding mechanisms to unfold and support the ribbed floor slab.

[0012] Furthermore, the ribbed floor slab is a conical column slab, and the diameter of the top plate is the same as the diameter of the upper part of the inner cavity of the ribbed floor slab.

[0013] Furthermore, the unfolding mechanism includes a rectangular plate installed on the outer surface of the movable sleeve. The upper part of the rectangular plate is provided with a connecting rod that connects to the lower part of the top plate. A fixing plate is provided on the side of the rectangular plate away from the axis of the movable sleeve. The fixing plate and the rectangular plate are connected by three arc-shaped rods. A support plate is provided on the side of the fixing plate away from the rectangular plate.

[0014] Furthermore, the three arc-shaped rods located on the same side gradually increase in length from top to bottom.

[0015] Furthermore, the number of the floor slab components is multiple, and they are evenly distributed along the gap between the two support components.

[0016] The present invention also provides a construction method for a reinforced concrete ribbed floor slab according to any one of the preceding claims, comprising the following steps: S1: Erect the formwork, hoist the prefabricated support components to the front and rear sides of the upper part of the formwork, and splice and fix the two support components by grouting sleeves; S2: Rotate the rocker arm to drive the threaded rod to rotate, causing the moving sleeve to move upward, which in turn drives the unfolding mechanism to open up and expand the ribbed floor slab into a conical column state; S3: Place the open floor slab components on the top of the formwork and distribute them evenly along the gap between the two support components; S4: Lay strong and weak current cables in the rectangular channel of the support component; S5: Pour concrete into the cavity formed by the formwork, support components and floor slab components until a cast slab is formed; S6: After the concrete has cured, remove the formwork, rotate the rocker arm in the opposite direction to move the moving sleeve downwards, the unfolding mechanism retracts, and the ribbed floor slab automatically separates from the concrete. S7: Remove the floor slab components one by one to complete the construction of the ribbed floor slab.

[0017] Compared with the prior art, the present invention has the following features and beneficial effects: This invention utilizes a floor slab component design where rotating a rocker arm drives a threaded rod to rotate, causing the movable sleeve to move up and down, controlling the opening and closing of the unfolding mechanism. Before pouring, the unfolding mechanism opens to form a stable cavity; during dismantling, it rotates in the opposite direction to close, automatically separating the ribbed floor slab from the concrete without the need for forceful prying, increasing dismantling efficiency by over 50%, eliminating the safety hazard of falling formwork, protecting the integrity of the concrete groove edges, and using prefabricated support components in the factory, requiring only grouting and sleeve splicing on-site. This significantly reduces on-site rebar tying and concrete pouring work, shortening the construction cycle by over 30% and reducing material waste by 20%. The combination of prefabricated ribs and on-site poured concrete, along with the conical and columnar groove design, ensures smoother stress transmission in the floor slab. It avoids cracking of the floor slab near columns; rectangular channels prevent damage to the structure caused by pipeline laying; expanding fireproof mortar provides reliable fireproof and heat insulation protection for pipelines, reducing the risk of leakage; dedicated pipeline channels meet the needs of laying strong and weak current pipelines without the need for additional trenching; it is suitable for large-span and large-space buildings; and it has the characteristics of light weight and excellent load-bearing capacity. It solves the problems of cumbersome formwork removal and great safety hazards in the construction of existing ribbed floor slabs, as well as the problems of easy damage to the structure, long construction period and pipeline laying damage to the structure in the construction of existing ribbed floor slabs. Its widespread use can produce good results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a plan view of the overall structure explosion effect of an embodiment of the present invention; Figure 3 This is a schematic diagram of the support component structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the floor slab component structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the floor slab assembly without the dense ribs according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the unfolding mechanism structure according to an embodiment of the present invention.

[0019] In the diagram, 1. Template; 2. Support assembly; 3. Floor slab assembly; 4. Cast-in-place slab; 5. Grouting sleeve; 21. Rib beam; 22. Rectangular channel; 23. Reinforcing bar; 31. Ribbed floor slab; 32. Top slab; 33. Deployment mechanism; 34. Guide plate; 35. Moving sleeve; 36. Sliding hole; 37. Threaded rod; 38. Rocker arm; 39. Limiting plate; 331. Rectangular plate; 332. Connecting rod; 333. Arc rod; 334. Fixing plate; 335. Support plate. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1 As shown, in the first embodiment of this application, the first structural implementation of the floor slab component is as follows: This embodiment provides a reinforced concrete ribbed floor slab, the overall structure of which is as follows: Figure 1 , Figure 2 As shown, it includes a template (1), a support assembly (2), a floor slab assembly (3), a cast-in-place slab (4), and a grouting sleeve (5).

[0025] The template (1) uses conventional steel or wooden templates to support the load during the construction of the entire floor slab. Support components (2) are symmetrically set on the front and rear sides of the upper part of the template (1), and the two support components (2) are fixedly connected by two grouting sleeves (5). Multiple floor slab components (3) are evenly distributed on the upper part of the template (1) along the gap between the two support components (2), and a cast slab (4) formed by concrete pouring is set on the upper part of the two support components (2).

[0026] The support component (2) is a prefabricated grid-shaped rib beam (21), such as... Figure 3 As shown. Several steel bars (23) are pre-embedded inside the rib beam (21) to ensure structural strength. A rectangular channel (22) is opened in the middle of the outer surface of the rib beam (21) for laying power and low voltage pipelines. The inner cavity of the rectangular channel (22) is filled with expanding fireproof mortar, which can expand and seal the gap between the pipeline and the channel in the event of a fire, prevent the spread of flames, and provide reliable fireproof and heat insulation protection for the pipeline.

[0027] The floor slab assembly (3) is the core component of this invention. For example... Figure 4 , Figure 5 As shown, the floor slab assembly (3) includes a ribbed floor slab (31), a top plate (32), an unfolding mechanism (33), a guide plate (34), a movable sleeve (35), a threaded rod (37), a rocker arm (38), and a limiting plate (39).

[0028] The ribbed floor slab (31) is made of deformable high-strength composite material or thin steel plate, and is in the shape of a conical column cap with a smaller top and a larger bottom. A guide plate (34) is fixedly installed at the bottom of its inner cavity. The guide plate (34) is a circular plate with five sliding holes (36) evenly opened at the five corners of its upper part, and a threaded rod (37) is installed through the center. The lower end of the threaded rod (37) passes through the guide plate (34) and is fixedly connected to the rocker arm (38), and the upper end is provided with a limiting plate (39). A movable sleeve (35) is fitted on the outer surface of the threaded rod (37), and the inner cavity of the movable sleeve (35) is provided with an internal thread that matches the threaded rod (37).

[0029] The outer surface of the movable sleeve (35) is connected to the inner cavity of the five sliding holes (36) via the deployment mechanism (33). The upper part of the five deployment mechanisms (33) is connected to the top plate (32), the diameter of which is the same as the upper diameter of the inner cavity of the ribbed floor slab (31), and is used to support the top of the ribbed floor slab (31) from the inside.

[0030] like Figure 6As shown, the unfolding mechanism (33) includes a rectangular plate (331), a connecting rod (332), an arc-shaped rod (333), a fixing plate (334), and a support plate (335). The rectangular plate (331) is fixedly installed on the outer surface of the movable sleeve (35), and its upper part is connected to the lower part of the top plate (32) through the connecting rod (332). A fixing plate (334) is provided on the side of the rectangular plate (331) away from the axis of the movable sleeve (35), and the fixing plate (334) is connected to the rectangular plate (331) through three arc-shaped rods (333). The length of the three arc-shaped rods (333) gradually increases from top to bottom, so that when the movable sleeve (35) moves upward, the arc-shaped rods (333) gradually rotate from an inclined state to a near-horizontal state, thereby pushing the fixing plate (334) to slide outward along the sliding hole (36). A support plate (335) is fixedly installed on the side of the fixed plate (334) away from the rectangular plate (331), and the support plate (335) is fixedly connected to the inner wall of the ribbed floor slab (31).

[0031] The working principle of this embodiment is as follows: Before construction, the operator turns the rocker arm (38) to drive the threaded rod (37) to rotate. Due to the threaded engagement between the movable sleeve (35) and the threaded rod (37) and the circumferential restriction of the movable sleeve (35) (through the engagement of the unfolding mechanism (33) and the sliding hole (36), the movable sleeve (35) moves upward along the threaded rod (37). The movable sleeve (35) drives the five rectangular plates (331) to rise synchronously. The rectangular plates (331) push the top plate (32) upward to support the top of the ribbed floor slab (31) through the connecting rod (332). At the same time, the rise of the rectangular plates (331) causes the arc rod (333) to gradually become horizontal from the inclination, pushing the fixed plate (334) to move radially outward along the sliding hole (36). The support plate (335) then expands outward to open the side wall of the ribbed floor slab (31). Finally, the ribbed floor slab (31) is fully expanded into a conical column state, forming a stable concrete molding cavity.

[0032] After the concrete is poured and cured, the operator reverses the rocker arm (38), the moving sleeve (35) moves downward, and the components move in the opposite direction: the top plate (32) moves down and detaches from the top of the ribbed floor slab (31), the arc rod (333) returns to its tilt and pulls the fixing plate (334) inward, and the support plate (335) disengages from the side wall of the ribbed floor slab (31). At this time, the ribbed floor slab (31) automatically detaches from the concrete groove due to its own elastic recovery or the tiny gap with the concrete, and can be easily removed.

[0033] In the second embodiment of this application, a second structural implementation of the floor slab assembly is described. The difference between this embodiment and embodiment 1 lies in the specific structure of the unfolding mechanism (33) and the material and connection method of the ribbed floor slab (31).

[0034] In this embodiment, the ribbed floor slab (31) adopts a split structure, including four separable arc-shaped side plates and an independent top cover plate. The unfolding mechanism (33) is no longer directly fixed to the side plates of the ribbed floor slab (31), but is detachably connected to the side plates by magnetic attraction or snap-fit. Specifically, the outer surface of the support plate (335) is embedded with an electromagnetic chuck or multi-point elastic snap-fit, and the inner wall of the ribbed floor slab (31) is provided with a ferromagnetic suction plate or slot at the corresponding position.

[0035] Before construction, the operator turns the rocker arm (38) to open the unfolding mechanism (33), and then controls the electromagnetic chuck to be energized or pushes the buckle into the slot to temporarily fix the support plate (335) to the side plate of the ribbed floor slab (31). At this time, the moving sleeve (35) continues to rise, the top plate (32) contacts the top cover plate and lifts it upward, and the side plate unfolds outward at the same time to form a complete conical column.

[0036] After the concrete has hardened, the operator reverses the rocker arm (38) to lower the moving sleeve (35) a short distance, causing the top plate (32) to disengage from the top cover plate, while the side plate remains connected to the support plate (335). Then, the operator reverses the rocker arm (38) a short distance again, causing the moving sleeve (35) to continue lowering. The arc-shaped rod (333) retracts inward, and the support plate (335) moves the side plate inward, disengaging it from the side wall of the concrete groove. Finally, the power to the electromagnetic chuck is cut off or the latch is released, separating the support plate (335) from the side plate, allowing the operator to remove the side plate and top cover plate separately.

[0037] The beneficial effects of this embodiment are: the split ribbed floor slab (31) facilitates transportation and replacement of damaged parts; the detachable connection method makes the separation of the formwork cover and the unfolding mechanism (33) more flexible during disassembly, avoiding difficulty in removal due to slight adhesion of concrete; at the same time, the design of electromagnetic chuck or buckle further reduces the labor intensity of operators.

[0038] In the third embodiment of this application, a construction method embodiment is provided. This embodiment provides a construction method for a reinforced concrete ribbed floor slab according to Embodiment 1, including the following specific steps: Step S1: Formwork erection and support component installation First, formwork (1) is erected at the designated location on the floor according to the design requirements, ensuring that the formwork (1) is horizontal and stable. The prefabricated support components (2) are hoisted to the front and rear sides of the upper part of the formwork (1) to align the ends of the two support components (2). Two grouting sleeves (5) are respectively fitted onto the ends of the connecting steel bars of the two support components (2). After adjusting the position, high-strength non-shrink grout is injected into the grouting sleeves (5). After the grout has cured, the splicing and fixing are completed. The grid-shaped ribs (21) of the support components (2) have steel bars (23) pre-embedded inside, and the rectangular channels (22) on the outer surface have been pre-filled with expanding fireproof mortar.

[0039] Step S2: Floor slab components open Place the floor slab assembly (3) on a temporary workbench. The operator holds the crank (38) and rotates it clockwise, driving the threaded rod (37) to rotate. The moving sleeve (35) moves upward along the threaded rod (37). The moving sleeve (35) drives the unfolding mechanism (33) to move: the rectangular plate (331) rises, pushing the top plate (32) upward through the connecting rod (332); at the same time, the arc-shaped rod (333) gradually changes from an inclined state to a horizontal state, pushing the fixed plate (334) to slide outward along the sliding hole (36), and the support plate (335) moves outward. When the moving sleeve (35) rises to the position of the limit plate (39), it stops rotating. At this time, the ribbed floor slab (31) is fully opened into a conical column state, the top plate (32) is close to the top of the inner cavity of the ribbed floor slab (31), and the support plate (335) is close to the side wall.

[0040] Step S3: Floor Component Arrangement The open floor slab components (3) are hoisted one by one and placed on the top of the formwork (1), evenly distributed along the gap between the two support components (2). The spacing between adjacent floor slab components (3) is determined according to the design drawings, usually 0.6~1.2 meters. After the arrangement is completed, check the stability of all floor slab components (3) to ensure that there is no tilting or loosening.

[0041] Step S4: Pipeline Laying Power and low voltage cables are laid in the rectangular channel (22) of the support component (2). Since the rectangular channel (22) has reserved space and is filled with expanding fireproof mortar, the cables can be fixed by directly nailing pipe clamps into the mortar layer or by tying them to the reinforcing bars (23) of the rib beam (21). After the cables are laid, the channel opening is sealed by smoothing with cement mortar or installing fireproof covers.

[0042] Step S5: Concrete pouring Concrete is poured into the cavity formed by the template (1), support components (2), and floor slab components (3). Commercial concrete of grade C30 or higher is used and poured evenly by pumping. Pouring should be done in layers, each layer not exceeding 500mm in thickness, and thoroughly vibrated with an immersion vibrator to ensure the concrete fills all gaps. After pouring to the design elevation of the top of the support components (2), pouring continues to form the pouring slab (4). The thickness of the pouring slab (4) is determined according to design requirements, typically 80-150mm. After pouring, the surface is smoothed and cured.

[0043] Step S6: Formwork Removal and Floor Slab Assembly Shrinkage After the concrete has cured to the design strength (usually 28 days or until the strength reaches 100% by testing with test blocks under the same conditions), the formwork (1) is removed first. After removing the formwork (1), the operator uses a lifting platform to rise to the floor slab assembly (3). The rocker arm (38) is rotated in the opposite direction (counterclockwise), driving the threaded rod (37) to rotate in the opposite direction, and the moving sleeve (35) moves downward. The unfolding mechanism (33) retracts: the top plate (32) moves down and disengages from the top of the ribbed floor slab (31), the arc rod (333) returns to its tilt and drives the fixed plate (334) to slide inward, and the support plate (335) disengages from the side wall of the ribbed floor slab (31). The ribbed floor slab (31) automatically separates from the concrete groove due to its own elasticity or gravity.

[0044] Step S7: Remove the floor slab assembly The operators removed the floor slab components (3) one by one from the concrete recesses. For the integrated ribbed floor slab (31) of Example 1, it can be removed as a whole; for the split structure of Example 2, the magnetic attraction or buckle must be released first, and the side plates and top cover plates must be removed separately. The floor slab components (3) can be reused after being cleaned.

[0045] At this point, the construction of the ribbed floor slab is complete. The resulting grooves are conical or cylindrical, allowing for smooth stress transfer and effectively preventing cracking of the floor slab around the columns.

[0046] In summary, this invention relates to the field of building construction technology and discloses a reinforced concrete ribbed floor slab and its construction method, comprising: a formwork; support components are provided on both the front and rear sides of the upper part of the formwork, and two support components are connected by two grouting sleeves; the upper part of the formwork is also provided with a plurality of floor slab components distributed along the gap between the two support components; the upper part of the two support components is provided with a casting slab, which is formed by concrete pouring; the floor slab component includes a ribbed floor slab provided on the upper part of the formwork; a guide plate is provided at the bottom of the inner cavity of the ribbed floor slab; sliding holes are provided at the five corners of the upper part of the guide plate; a threaded rod is provided at the center of the upper part of the guide plate; the lower part of the threaded rod passes through the guide plate and is provided with a rocker arm; a movable sleeve is provided on the outer surface of the threaded rod; an unfolding mechanism is provided on the outer surface of the movable sleeve and the inner cavity of the five sliding holes; a top plate is provided on the upper part of the five unfolding mechanisms; and a limiting plate is provided on the upper part of the threaded rod.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A reinforced concrete ribbed floor slab, comprising: Template (1); characterized in that, the upper front and rear sides of the template (1) are provided with support components (2), and the two support components (2) are connected by two grouting sleeves (5). The upper part of the template (1) is also provided with a number of floor slab components (3) distributed along the gap between the two support components (2). The upper part of the two support components (2) is provided with a casting slab (4), which is formed by concrete casting. The floor slab component (3) includes a ribbed floor slab (31) set on the upper part of the template (1). The bottom of the inner cavity of the ribbed floor slab (31) is provided with A guide plate (34) is provided with sliding holes (36) at each of the five corners of the upper part of the guide plate (34). A threaded rod (37) is provided at the center of the upper part of the guide plate (34). The lower part of the threaded rod (37) passes through the guide plate (34) and is provided with a rocker arm (38). A movable sleeve (35) is provided on the outer surface of the threaded rod (37). An unfolding mechanism (33) is provided on the outer surface of the movable sleeve (35) and the inner cavity of the five sliding holes (36). A top plate (32) is provided on the upper part of the five unfolding mechanisms (33). A limiting plate (39) is provided on the upper part of the threaded rod (37).

2. The reinforced concrete ribbed floor slab according to claim 1, characterized in that, The support component (2) includes a grid-shaped rib beam (21), which contains several steel bars (23). A rectangular channel (22) for laying power and low voltage pipelines is opened in the middle of the outer surface of the rib beam (21).

3. A reinforced concrete ribbed floor slab according to claim 2, characterized in that, The inner cavity of the rectangular channel (22) is filled with expanding fireproof mortar.

4. A reinforced concrete ribbed floor slab according to claim 2, characterized in that, The inner cavity of the movable sleeve (35) is provided with an internal thread that matches the threaded rod (37). When the threaded rod (37) is driven to rotate by the rocker arm (38), the movable sleeve (35) moves upward, causing the five unfolding mechanisms (33) to unfold and support the ribbed floor slab (31).

5. A reinforced concrete ribbed floor slab according to claim 4, characterized in that, The ribbed floor slab (31) is a conical column slab, and the diameter of the top plate (32) is the same as the diameter of the upper part of the inner cavity of the ribbed floor slab (31).

6. A reinforced concrete ribbed floor slab according to claim 4, characterized in that, The unfolding mechanism (33) includes a rectangular plate (331) installed on the outer surface of the movable sleeve (35). The upper part of the rectangular plate (331) is provided with a connecting rod (332) connected to the lower part of the top plate (32). A fixing plate (334) is provided on the side of the rectangular plate (331) away from the axis of the movable sleeve (35). The fixing plate (334) and the rectangular plate (331) are connected by three arc-shaped rods (333). A support plate (335) is provided on the side of the fixing plate (334) away from the rectangular plate (331).

7. A reinforced concrete ribbed floor slab according to claim 4, characterized in that, The three arc-shaped rods (333) located on the same side gradually increase in length from top to bottom.

8. A reinforced concrete ribbed floor slab according to claim 7, characterized in that, The number of floor slab components (3) is multiple, and they are evenly distributed along the gap between the two support components (2).

9. A construction method for a reinforced concrete ribbed floor slab according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: Erect the template (1), hoist the prefabricated support components (2) to the front and rear sides of the upper part of the template (1), and fix the two support components (2) by grouting sleeve (5); S2: Rotate the rocker arm (38) to drive the threaded rod (37) to rotate, causing the moving sleeve (35) to move upward, driving the unfolding mechanism (33) to open, and expanding the ribbed floor slab (31) into a conical column state; S3: Place the floor slab assembly (3) in the open state on the top of the template (1) and distribute it evenly along the gap between the two support assemblies (2); S4: Lay strong and weak electrical lines in the rectangular channel (22) of the support component (2); S5: Pour concrete into the cavity formed by the template (1), support components (2) and floor components (3) until the cast slab (4) is formed. S6: After the concrete has cured, remove the formwork (1), turn the rocker arm (38) in the opposite direction to make the moving sleeve (35) move downward, the unfolding mechanism (33) retracts, and the ribbed floor slab (31) automatically separates from the concrete; S7: Remove the floor slab components one by one (3) to complete the construction of the ribbed floor slab.

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