Post-tensioned prestressed reinforced concrete floor structure

Abstract

The utility model relates to a kind of construction field, disclose post-tensioned prestressed concrete floor structure, floor framework structure whole is " well " grid-like, it includes: column cap, column cap is located in the four corners of floor framework, column cap is located in the upper end of structural column being set in four corners;Joint mould, joint mould is distributed in the intersection node position of grid structure;Beam mould, the two ends of beam mould are connected with joint mould, form the " well " frame of floor framework;Board mould, board mould is laid in the well grid in the " well " frame formed by beam mould, joint mould, and edge portion is connected with beam mould support;Steel mesh, steel mesh is laid on joint mould, board mould and beam mould as the framework of post-cast reinforced concrete;Steel strand, steel strand is laid in beam mould and two ends are connected on tensioning pedestal;Steel strand is post-tensioned prestressed steel strand.This kind of scheme has the advantages such as simple construction, low cost, large load bearing etc.

Description

Technical Field

[0001] This utility model relates to the field of construction, and mainly to post-tensioned prestressed reinforced concrete floor slab structures. Background Technology

[0002] Traditional reinforced concrete cast-in-place frame structures are currently the most common structural form in industrial and civil buildings. Due to the properties of reinforced concrete and its stress characteristics, this structural form limits the column grid size and floor load. However, for some industrial plants and civil buildings such as warehouses, cold storage facilities, and supermarkets, the live loads required for their function are often at least 10kN, frequently 50kN, and even approaching 100kN for production functions. Traditional reinforced concrete frame structures can hardly withstand such large live loads. Steel structure technology has been developed to address this, but corrosion and fire prevention remain issues. Prestressed reinforced concrete technology and prefabricated structures, such as the prefabricated floor system disclosed in CN204386002U, have also been developed, but none have yet perfectly solved the problem of multi-story, high-load floor structures. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a post-tensioned prestressed reinforced concrete floor slab structure.

[0004] The post-tensioned prestressed reinforced concrete floor slab structure has an overall grid-like structure, which includes:

[0005] Column capitals are located at the four corners of the floor slab frame, and are situated at the top of the structural columns located at the four corners.

[0006] Node modules are distributed at the intersections of the mesh structure.

[0007] The beam formwork is connected to the node formwork at both ends to form a grid framework for the floor slab skeleton.

[0008] The slab formwork is laid in the grid of the "grid" frame formed by the beam formwork and the node formwork, and its edges are connected and supported to the beam formwork.

[0009] Reinforcing mesh is laid on joint formwork, slab formwork, and beam formwork as a skeleton for post-cast reinforced concrete.

[0010] The steel strands are laid in the beam formwork and connected at both ends to the tensioning platform; the steel strands are post-tensioned prestressed steel strands.

[0011] Preferably, the node molds, beam molds, and slab molds are all precast molds; the node molds include the middle node molds in the middle area and the edge node molds in the edge area, and the beam molds include the middle beam molds laid in the middle area and the edge beam molds in the edge area. The node molds are supported by vertical supports; the edge beam molds are laid between the column caps and edge nodes on the same side, and between edge nodes; the middle beam molds are laid between the middle node molds except for the edge areas. The edge beam molds and the middle beam molds are arranged in the horizontal or vertical direction; the tensioning platform is set on the column caps at the four corners and on the edge node molds. Steel strands are laid in the horizontal and vertical directions where the grid beam molds are located. The two ends of the steel strands are connected to the tensioning platform on the edge node molds at both ends and pass through all the beam molds in the horizontal or vertical direction.

[0012] Preferably, the node formwork is pre-embedded with a first steel bar sleeve. The number and position of the first steel bar sleeve are adapted to the number and position of the steel strands to be connected to the node. The node formwork is provided with an assembly port for cooperating with the beam formwork. The end of the beam formwork is embedded in the node formwork through the assembly port.

[0013] As a preferred embodiment, the beam formwork includes a main trough structure, with horizontally arranged support wing structures along the upper edge of the trough. The formwork is erected on the support wing, and a second steel bar sleeve is provided at the bottom of the trough, through which steel strands pass.

[0014] Preferably, the thickness of the formwork is 40mm~80mm, the formwork is a precast reinforced concrete product, and the surface of the formwork is provided with a stiffening frame.

[0015] As a preferred option, the stiffening frame is a steel bar frame, which is formed by steel pipes filled with cement grout. The stiffening frame protrudes from the surface of the formwork, and a steel mesh is laid on the stiffening frame.

[0016] Preferably, the column cap includes a bottom surface and a cross-shaped cantilever beam extending from the bottom surface to all four sides. The cantilever beam is used to support the beam formwork. Reinforcement is provided on the cantilever beam, and the reinforcement enters the groove of the beam formwork through the installation holes reserved on the bottom plate of the beam formwork. The side beam is a groove structure, and additional reinforcing bars are provided on the surface of the side beam across the column cap, or / and a first reinforcing cage is provided inside the side beam.

[0017] Preferably, the elevation of the support wing of the beam formwork connected to the corner is lower than the elevation of other beam formworks.

[0018] Preferably, it also includes a temporary vertical support, the end of which is detachably fitted with a support cap for matching the installation of the middle node mold and the side node mold; the temporary vertical support is provided with a height adjustment device for adjusting the height of the support cap; or the temporary vertical support is equipped with a stiffening frame, the stiffening frame is connected with a stiffening rope and a rotating tensioner for adjusting the stiffening rope, and the bottom of the temporary vertical support is provided with a steel plate base.

[0019] A construction method for a precast spliced ​​bottom formwork bearing a large load of prestressed bidirectional concrete floor slab, employing the aforementioned post-tensioned prestressed reinforced concrete floor slab structure; including precast edge node formwork, middle node formwork, middle beam formwork, edge beam formwork, steel mesh assembly, middle precast slab formwork, and corner precast slab formwork; also including temporary vertical supports; the construction includes the following steps:

[0020] Step 1: Divide the construction area into a grid using a "well" shape through planning and design, and confirm the intersections of each grid. The grid intersections include the corner points, the intersections of the horizontal and vertical lines on the sides, and the intersections of the horizontal and vertical lines in the middle area.

[0021] Step 2: Lay out the edge node formwork and the middle node formwork. There are cast-in-place reinforced concrete structural columns at the four corners. The upper end of the structural columns is equipped with column caps. All other intersections are equipped with temporary vertical supports. The upper end of the temporary vertical supports is equipped with brackets. Then, install the edge node formwork and the middle node formwork on each bracket.

[0022] Step 3: Lay the side beam formwork. The side beam formwork is laid in both the transverse and longitudinal directions. The side node formwork and column caps support the side beam formwork to form a rectangular frame. Lay the middle beam formwork. The middle beam formwork is laid in both the transverse and longitudinal directions. Its two ends are erected on the middle node formwork and the side node formwork. This forms a beam formwork structure of two-way grid piles.

[0023] Step 4: Lay steel strands. Install tensioning platforms in the edge node formwork area and column cap area, and then lay steel strands. The steel strands extend along the beam formwork grid formed by the laying, that is, they extend horizontally and vertically, and both ends are fixedly installed on the tensioning platforms.

[0024] Step 5: Lay the formwork. Install corner precast slab formwork in the four corner grids, and place the middle precast slab formwork in the remaining positions. The four sides of the middle precast slab formwork and the corner precast slab formwork are supported on the beam formwork that forms the grid area.

[0025] Step 6: Lay the reinforcing mesh. The reinforcing mesh is a pre-set mesh, and the corresponding reinforcing mesh is laid for the slab formwork area, node formwork area and beam formwork area.

[0026] Step 7: Pour the concrete surface layer. The concrete is poured onto the steel mesh and fills the space inside the beam formwork and the space inside the node formwork to form the concrete surface layer.

[0027] Step 8: Then, tension the steel strands to apply prestress and complete the construction of the floor slab;

[0028] Step 9: Repeat the above steps as needed to carry out multi-layer construction;

[0029] Or it can be constructed using the following technical methods,

[0030] Temporary vertical supports are set up along the structural column grid axis to form the formwork for casting the edge beams and column caps of the structural columns. The edge beams are equipped with ordinary reinforcement to bear the loads during the construction stage and post-tensioned prestressed steel strands to bear the loads of the floor slab structure in the future. The two ends of the steel strands are connected to the steel pedestals on the side of the structural columns. Then, precast intermediate node formwork is laid along the intersection of the divided longitudinal and transverse grids using temporary vertical supports. The intermediate beam formwork is laid longitudinally and transversely on the node formwork, with the end closest to the edge beam directly resting on the edge beam to form the bottom formwork of the transverse beam. Then, edge formwork is set along the edge of the edge beam. Then, steps four to eight above are repeated.

[0031] Compared with existing technologies, this solution offers the following advantages: This novel reinforced concrete floor slab structure system utilizes precast reinforced concrete beam and slab formwork to create a two-way grid structure, lays standardized steel mesh, and employs post-tensioned high-strength steel strands, resulting in simple and rapid construction, safe bearing of large floor loads, low cost, and compliance with current initiatives promoting low-carbon, energy-saving, and industrialized construction techniques. This novel floor slab structure can also be used to construct elevated ground floors. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the device.

[0033] Figure 2 for Figure 1 A schematic diagram of the structure after removing the mold plate.

[0034] Figure 3 This is a schematic diagram of the temporary support structure.

[0035] Figure 4 This is a schematic diagram of the node module structure.

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of the beam mold.

[0037] Figure 6 This is a schematic diagram of the plate mold structure.

[0038] Figure 7 This is a structural diagram of a steel mesh.

[0039] Figure 8 This is a schematic diagram of the column cap structure.

[0040] Figure 9 This is a schematic diagram of the cross section of the column cap.

[0041] Figure 10 It is a top view showing the assembly of components such as beam formwork units, node formwork units, and steel strands.

[0042] Figure 11 yes Figure 10 A sectional view.

[0043] Figure 12 This is a schematic diagram of the tensioning platform.

[0044] Figure 13 This is a structural schematic diagram of the steel reinforcement cage.

[0045] Figure 14 This is a schematic diagram of the installation of the steel strand crossing structure.

[0046] Figure 15 yes Figure 14 A sectional view.

[0047] Figure 16 This is a structural schematic diagram of the construction method in Example 5.

[0048] Figure 17 This is a structural schematic diagram of the precast side beam mold.

[0049] The technical names of the reference numerals in the figure are as follows: 15—vertical support, 1—column cap, 2—node formwork, 2a—middle node formwork, 2b—side node formwork, 2c—assembly opening, 4—beam formwork, 4a—middle beam formwork, 4b—side beam formwork, 4c—support wing, 8—tensioning platform, 10—slab formwork, 11—corner precast slab formwork, 12—reinforcing mesh, 6—steel strand, 16—support cap, 17—height adjustment device, 18—stiffening frame, 19—stiffening rope, 20—tensioner, 21—steel plate platform, 22—reinforcing bar clasp, 24—stiffening frame, 25—reinforcing cage, 26—cantilever beam, 27—reinforcement, 28—additional reinforcement, 28—side beam, 30—composite beam, 33—upper reinforcement, 34—stirrups. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0051] Example 1

[0052] The post-tensioned prestressed reinforced concrete floor slab structure has an overall grid-like structure, which includes:

[0053] Column cap 1 is located at the four corners of the floor slab frame and at the top of the structural columns at the four corners; the column cap 1 is located on the cast-in-place structural columns and serves as a stable support.

[0054] Node mold 2 is distributed at the intersection of the mesh structure; the node mold 2 is a precast mold made of reinforced concrete, and the size and shape of the node mold 2 are designed according to its location and function; its main purpose is to support the beam mold 4, thereby forming a longitudinal and transverse skeleton structure.

[0055] Beam mold 4, with both ends connected to node mold 2, forming a "well" grid frame of the floor slab skeleton; the side of beam mold 4 can be used to erect slab mold 10, wherein beam mold 4a in this embodiment is a straight beam mold 4, the straight beam mold 4 has a channel-shaped structure, and the upper side of beam mold 4 is provided with a flying wing to support slab mold 10.

[0056] The plate formwork 10 is laid in the grid of the "grid" frame formed by the beam formwork 4 and the node formwork 2, and its edges are connected and supported to the beam formwork 4; the plate formwork 10, the beam formwork 4, and the node formwork 2 thus form the bottom structure of the overall skeleton.

[0057] Reinforcing mesh 12 is laid on node formwork 2, slab formwork 10, and beam formwork 4 as the skeleton for post-cast reinforced concrete. The reinforcing mesh 12 is laid using 12 standard reinforcing mesh sheets, which greatly improves the efficiency of laying. Moreover, the standardized design can also save costs. The slab surface can be poured immediately after the reinforcing mesh 12 is laid.

[0058] Steel strand 6 is laid in beam formwork 4 and connected at both ends to tensioning platforms (8, 9); steel strand 6 is post-tensioned prestressed steel strand 6. During construction, temporary vertical supports 15 need to be installed at the intersections of this type of framework. These temporary vertical supports 15 are used to support node formwork 2, and the location of each node is confirmed through a pre-planned grid. The steel strand 6 is initially installed before the steel mesh 12 is laid.

[0059] The node mold 2, beam mold 4, and slab mold 10 are all precast molds, specifically reinforced concrete precast molds. The node mold 2 includes a middle node mold 2a in the middle area and a side node mold 2b in the edge area. The beam mold 4 includes a middle beam mold 4a laid in the middle area and a side beam mold 4b in the edge area. The node mold 2 is supported by vertical supports 15. The side beam mold 4b is laid between the column cap 1 and the side node on the same side, and between the side nodes. The middle beam mold 4a is laid between the middle node molds 2a except for the edge area. The side beam mold 4b and the middle beam mold 4a are both set in the horizontal or vertical direction. The tensioning platform (8, 9) is set on the column cap 1 at the four corners and on the side node mold 2b. Steel strands 6 are laid in the horizontal and vertical directions where the grid beam mold 4 is located. The two ends of the steel strands 6 are connected to the tensioning platform (8, 9) on the two side node molds 2b and pass through all the beam molds 4 in the horizontal or vertical direction. The beam formwork 4a is internally reinforced with thin steel bars to bear the construction load of the precast slab formwork 10 placed on it and the poured concrete floor slab. It is generally made using the pre-tensioned long-line method. The beam formwork 4a has steel bar clips 22 pre-embedded in the bottom of the groove to fasten the passing steel strands 6 and the hooks during the construction stage.

[0060] The node mold 2a has a first steel bar sleeve 22 pre-embedded on it. The number and position of the first steel bar sleeve 22 are adapted to the number and position of the steel strands 6 to be connected to the node. The node mold 2 is provided with an assembly port 2c for cooperating with the beam mold 4. The end of the beam mold 4 is embedded in the node mold 2 through the assembly port 2c.

[0061] The beam formwork 4 includes a main trough structure, with a horizontally arranged support wing 4c structure on the upper edge of the trough. The plate formwork 10 is erected on the support wing 4c, and a second steel bar sleeve 23 is provided at the bottom of the trough. The steel strand 6 passes through the second steel bar sleeve 23.

[0062] In this embodiment, the thickness of the formwork 10 is 40mm~80mm. The formwork 10 is a precast reinforced concrete product, and a stiffening frame 24 is provided on the surface of the formwork 10. The stiffening frame 24 is a steel bar structure. The formwork 10 includes a central area formwork 10 and corner precast formwork 11, both of which are precast reinforced concrete products. Besides increasing the rigidity of the formwork 10, the stiffening frame also serves as a support for the reinforcing mesh 12. The stiffening frame 24 is a steel bar structure formed by steel pipes filled with cement grout. The stiffening frame 24 protrudes from the surface of the formwork 10, and the reinforcing mesh 12 is laid on the stiffening frame 24.

[0063] To facilitate understanding, the column cap 1 is further explained as follows: The column cap 1 includes a bottom surface and a cross-shaped cantilever beam 26 extending from the bottom surface to the surrounding area. The cantilever beam 26 is used to support the beam formwork 4. The cantilever beam 26 is provided with reinforcement 27, which enters the groove of the beam formwork 4 through the installation holes reserved on the bottom plate of the beam formwork 4. The side beam 28 is a groove structure, and additional reinforcing bars are provided on the surface of the side beam 28 across the column cap 1, and / or a first reinforcing cage 25 is provided inside the side beam 28.

[0064] In this embodiment, the end of the temporary vertical support 15 is detachably equipped with a cap 16 for matching the installation of the middle node mold 2a and the side node mold 2b; the temporary vertical support 15 is provided with a height adjustment device 17 for adjusting the height of the cap 16; or the temporary vertical support 15 is equipped with a stiffening frame 18, the stiffening frame 18 is connected with a stiffening rope 19 and a rotating tensioner 20 for adjusting the stiffening rope, and the bottom of the temporary vertical support 15 is provided with a steel plate base 21.

[0065] Example 2

[0066] Based on Example 1, to further enhance the punching shear strength of the corner area of ​​the floor slab structure, when the load and column grid size on the floor slab are large, a simple modification is made to the precast beam formwork 4 near the corner grid. One side of the supporting plate formwork 10 is lowered, causing the surface elevation of the corner precast plate formwork 11 to decrease. This results in a localized thickening of the grid floor slab after pouring, thereby enhancing the overall stiffness and punching shear strength of the floor slab structure. Specifically, the elevation of the supporting wing 4c of the corner beam formwork 4 is lower than the elevation of the other beam formwork 4.

[0067] Example 3

[0068] A construction method for a precast spliced ​​bottom formwork bearing a large load of prestressed bidirectional concrete floor slab, employing the aforementioned post-tensioned prestressed reinforced concrete floor slab structure, the framework being the structural framework described in Example 1; including precast edge node formwork 2b, middle node formwork 2a, middle beam formwork 4a, edge beam formwork 4b, 12 sets of steel mesh, middle precast slab formwork 10, and corner precast slab formwork 10; also including temporary vertical supports 15; the construction includes the following steps:

[0069] Step 1: Divide the construction area into a grid using a "well" shape through planning and design, and confirm the intersections of each grid. The grid intersections include the corner points, the intersections of the horizontal and vertical lines on the sides, and the intersections of the horizontal and vertical lines in the middle area.

[0070] Step 2: Lay out the edge node mold 2b and the middle node mold 2a. There are cast-in-place reinforced concrete structural columns at the four corners. The upper end of the structural columns is equipped with column caps 1. All other intersections are equipped with temporary vertical supports 15. The upper end of the temporary vertical supports 15 is equipped with brackets 16. Then, install the edge node mold 2b and the middle node mold 2a on each bracket 16.

[0071] Step 3: Lay the side beam formwork 4b. The side beam formwork 4b is laid in both the transverse and longitudinal directions. The side node formwork 2b and the column cap 1 support the side beam formwork 4b to form a rectangular frame. Lay the middle beam formwork 4a. The middle beam formwork 4a is laid in both the transverse and longitudinal directions. Its two ends are erected on the middle node formwork 2a and the side node formwork 2b. This forms the beam formwork 4 structure of the two-way grid pile.

[0072] Step 4: Lay steel strand 6. Install tensioning platforms (8, 9) in the edge node formwork 2b area and column cap 1 area, and then lay steel strand 6. The steel strand 6 extends along the beam formwork 4 grid formed by laying, that is, it extends horizontally and vertically, and both ends are fixedly installed on the tensioning platforms (8, 9).

[0073] Step 5: Lay out the slab formwork 10, install the corner precast slab formwork 11 in the grid at the four corners, and place the middle precast slab formwork 10 in the remaining positions. The four sides of the middle precast slab formwork 10 and the corner precast slab formwork 11 are all supported on the four sides of the beam formwork that forms the grid area.

[0074] Step 6: Lay the steel mesh 12. The steel mesh 12 pieces are pre-set steel mesh 12, and the corresponding steel mesh 12 are laid for the slab formwork 10 area, the node formwork 2 area and the beam formwork 4 area.

[0075] Step 7: Pour the concrete surface layer. The concrete is poured on the steel mesh 12 and fills the space inside the beam formwork 4 and the space inside the node formwork 2 to form the concrete surface layer.

[0076] Step 8: Then, tension the steel strands 6 to apply prestress and complete the construction of the floor slab.

[0077] Example 4

[0078] Based on Example 3, when the floor is a multi-story structure, the above steps are repeated as needed for multi-story construction.

[0079] Example 5

[0080] Based on Examples 3 and 4, the following improvements are made: Temporary vertical supports 15 are set along the structural column grid axis to form and cast the side beam 28 and the column cap 1 of the structural column. The side beam 28 is provided with ordinary reinforcement 27 to bear the load during the construction stage and post-tensioned prestressed steel strands 6 to bear the load of the floor slab structure in the future. The two ends of the steel strands 6 are connected to the steel platform on the side of the structural column. Then, the precast intermediate node formwork 2a is laid along the intersection of the divided longitudinal and transverse grids using temporary vertical supports 15. The intermediate beam formwork 4a is laid longitudinally and transversely on the node formwork 2, with the end near the side beam 28 directly resting on the side beam 28 to form the bottom formwork of the transverse beam. Then, the edge formwork is set along the edge of the side beam 28. Then, steps four to eight above are repeated.

[0081] The edge beam 28 along the four sides of the structural column grid is a composite beam cast in two stages. The cross-section and reinforcement 27 of the first casting are designed to withstand the construction load and self-weight transmitted from the middle as a supporting beam. After the floor slab is cast, it forms an upper and lower composite beam, with the pre-embedded steel strands 7 tensioned to bear the load during the service life of the floor slab structure. The steel platform 9 is constructed in the same way as above and can either not pass through the columns or pass through them; the latter is generally recommended. The composite beam 30 is reinforced with steel bars 33 and stirrups 34 on top.

Claims

1. A post-tensioned prestressed reinforced concrete floor structure, characterized in that: The overall floor slab framework structure is in the form of a grid, which includes: Column cap (1), the column cap (1) is located at the four corners of the floor frame, and the column cap (1) is located at the upper end of the structural column set at the four corners; Node module (2) is distributed at the intersection of the mesh structure; Beam mold (4), the two ends of beam mold (4) are connected to node mold (2) to form a "well" grid frame of floor skeleton; The plate formwork (10) is laid in the grid of the "grid" frame formed by the beam formwork (4) and the node formwork (2), and its edge is connected and supported to the beam formwork (4); The steel mesh (12) is laid on the node formwork (2), slab formwork (10) and beam formwork (4) as the skeleton of the post-cast reinforced concrete; Steel strand (6) is laid in the beam formwork (4) and its two ends are connected to the tensioning platform (8, 9); the steel strand (6) is a post-tensioned prestressed steel strand (6). It also includes the concrete surface layer formed by the concrete poured on the column cap (1), node formwork (2), beam formwork (4), slab formwork (10) and steel mesh.

2. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The node mold (2), beam mold (4), and slab mold (10) are all precast molds; the node mold (2) includes the middle node mold (2a) in the middle area and the edge node mold (2b) in the edge area, and the beam mold (4) includes the middle beam mold (4a) laid in the middle area and the edge beam mold (4b) in the edge area. The node mold (2) is supported by vertical supports (15); the edge beam mold (4b) is laid between the column cap (1) on the same side and the edge node, and between the edge nodes, and the middle beam mold (4a) is laid... Between the middle node molds (2a) except for the edge part, the side beam molds (4b) and the middle beam molds (4a) are set in the horizontal or vertical direction; the tensioning platform (8, 9) is set on the column caps (1) at the four corners and on the side node mold (2b). Steel strands (6) are laid in the horizontal and vertical directions where the grid beam mold (4) is located. The two ends of the steel strands (6) are connected to the tensioning platform (8, 9) on the two end side node molds (2b) and pass through all the beam molds (4) in the horizontal or vertical direction.

3. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The node mold (2) is pre-embedded with a first steel bar sleeve (22). The number and position of the first steel bar sleeve (22) are adapted to the number and position of the steel strand (6) to be connected to the node. The node mold (2) is provided with an assembly port (2c) for cooperating with the beam mold (4). The end of the beam mold (4) is embedded in the node mold (2) through the assembly port (2c).

4. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The beam formwork (4) includes the main body of the trough structure. The upper edge of the trough is provided with a horizontally arranged support wing (4c) structure. The plate formwork (10) is erected on the support wing (4c). The bottom of the trough is provided with a second steel bar sleeve (23). The steel strand (6) passes through the second steel bar sleeve (23).

5. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The thickness of the formwork (10) is 40mm~80mm. The formwork (10) is a precast reinforced concrete product. The surface of the formwork (10) is provided with a stiffening frame (24).

6. The post-tensioned prestressed reinforced concrete floor structure according to claim 5, characterized in that: The stiffening frame (24) is a steel bar frame, which is formed by steel pipes filled with cement grout. The stiffening frame (24) protrudes from the surface of the formwork (10), and the steel mesh (12) is laid on the stiffening frame (24).

7. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The column cap (1) includes a bottom surface and a cross-shaped cantilever beam (26) extending outward from the bottom surface. The cantilever beam (26) is used to support the beam formwork (4). The cantilever beam (26) is provided with reinforcement (27). The reinforcement (27) enters the groove of the beam formwork (4) through the installation holes reserved on the bottom plate of the beam formwork (4). The side beam (28) is a groove structure. Additional reinforcement bars are provided on the surface of the side beam (28) across the column cap (1), or / and a first reinforcement cage (25) is provided inside the side beam (28).

8. The post-tensioned prestressed reinforced concrete floor structure according to claim 4, characterized in that: The elevation of the support wing (4c) of the beam formwork (4) connected to the corner is lower than the elevation of the other beam formwork (4).

9. The post-tensioned prestressed reinforced concrete floor structure according to claim 2, characterized in that: It also includes a temporary vertical support (15), the end of which is detachably fitted with a cap (16) for matching the installation of the middle node mold (2a) and the side node mold (2b); the temporary vertical support (15) is provided with a height adjustment device (17) for adjusting the height of the cap (16); or the temporary vertical support (15) is fitted with a stiffening frame (18), the stiffening frame (18) is connected with a stiffening rope (19) and a rotating tensioner (20) for adjusting the stiffening rope, and the bottom of the temporary vertical support (15) is provided with a steel plate base (21).

10. The post-tensioned prestressed reinforced concrete floor structure according to claim 1, characterized in that: The edge beams of the floor slab are replaced by beams formed by construction. The edge beams are either beams formed in one step or composite beams formed by multiple constructions. The upper part of the beams is reinforced with steel bars (33) and stirrups (34).

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