A kind of assembled high-strength prefabricated floor slab and its manufacturing process

Abstract

The present invention relates to the technical field of concrete components, and specifically to an assembled high-strength prefabricated floor slab and a manufacturing process, comprising a lower concrete layer of a prefabricated board, a steel strand is placed on the top of the lower concrete layer of the prefabricated board, an upper concrete layer of the prefabricated board is placed on the top of the steel strand, the upper concrete layer of the prefabricated board comprises a side positioning component and a top positioning component, the top positioning component is fixedly mounted on the top of the upper concrete layer of the prefabricated board, the side positioning component is fixedly mounted on both sides of the upper concrete layer of the prefabricated board, the side positioning component comprises a displacement device and a transmission device, the displacement device is fixedly mounted on both ends of the transmission device, the transmission device comprises a worm gear, a supporting cross plate, a second gear and a positioning base plate, and the positioning base plate is fixedly mounted on the side end of the supporting cross plate. By setting the side positioning component and the top positioning component, the purpose of synchronous auxiliary positioning of the side end and rapid restriction of the top reinforcement of the assembled prefabricated floor slab is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete components, in particular to an assembled high-strength prefabricated floor slab and a manufacturing process thereof. Background Art

[0002] Precast slabs, also known as prefabricated panels, are commonly used floor materials in early 20th century buildings, and are also modules or panels used in engineering. They are prefabricated concrete parts produced and processed in the prefabrication yard and directly transported to the construction site for installation, hence the name precast panels.

[0003] For example, a high-strength prefabricated concrete composite floor slab with Chinese patent publication number CN112878564A includes a base plate, a support device, an arc device and a steel bar device. The support devices are symmetrically arranged on the upper end of the base plate, and the support devices are connected by an arc device. The upper ends of the support devices and the arc device are both installed with steel bar devices; wherein: the support device includes a horizontal concrete plate, a first reinforcement rib, a second reinforcement rib, a locking block, a locking rod, a sliding block and a side guide rib, a horizontal concrete plate is installed on the upper end of the base plate, a first reinforcement rib is symmetrically arranged inside the horizontal concrete plate, a second reinforcement rib is arranged between the first reinforcement rib, the second reinforcement rib is arranged in the middle of the inner side of the horizontal concrete plate, and a locking block is symmetrically installed on the left end of the horizontal concrete plate.

[0004] At present, when installing and using prefabricated floor slabs on the market, multiple steel bars need to be reinforced and tied again, and the tying requires the use of external tools and steel wires, which makes it impossible for the existing prefabricated floor slabs to achieve the purpose of synchronous side end auxiliary positioning and top end rapid restriction of steel bars. Therefore, a device is needed to improve the above problem. Summary of the invention

[0005] In view of the problems in the prior art, the present invention provides an assembled high-strength prefabricated floor slab and a manufacturing process.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an assembled high-strength prefabricated floor slab and its manufacturing process, including a lower concrete layer of the prefabricated slab, a steel strand is placed on the top of the lower concrete layer of the prefabricated slab, and an upper concrete layer of the prefabricated slab is cast on the top of the steel strand.

[0007] Specifically, the upper concrete layer of the precast plate includes a side end positioning component and a top end positioning component, the top end positioning component is fixedly installed at the top end of the upper concrete layer of the precast plate, the side end positioning components are fixedly installed on both sides of the upper concrete layer of the precast plate, the side end positioning components include a displacement device and a transmission device, the displacement device is fixedly installed at both ends of the transmission device, and the transmission device includes a worm gear, a supporting cross plate, a second gear and a positioning base plate, the positioning base plate is fixedly installed at the side end of the supporting cross plate, a worm is rotatably installed inside the positioning base plate, the worm gear is rotatably installed at the side end center of the supporting cross plate, and the worm gear is meshed with the worm gear, the second gear is fixedly installed at the side end center of the worm gear away from the supporting cross plate, the supporting cross plate is rotatably installed with two guide wheels near the top end of the second gear, and the inner top and bottom ends of the supporting cross plate are rotatably installed with winding wheels respectively, and the winding wheel is fixedly installed with a first gear near the side end center of the second gear.

[0008] Specifically, the displacement device includes an extension frame, an embedded rod and a hexagonal rod, wherein the embedded rod is symmetrically fixedly installed on one side of the extension frame, and the hexagonal rod is slidably inserted inside the other side of the extension frame, and a positioning card is fixedly installed on the front end of the hexagonal rod, and a rack is fixedly installed on the rear end of the hexagonal rod;

[0009] When the worm rotates, the second gear can be driven to rotate through the worm wheel, so that the two racks can be displaced respectively.

[0010] Specifically, the top positioning component includes a synchronization device and a support device, and the synchronization device is symmetrically slidably inserted on the top of the support device.

[0011] Specifically, the synchronization device includes a displacement frame, a steel wire rope and a special-shaped bracket, the special-shaped bracket is fixedly installed at one end of the steel wire rope, the displacement frame is fixedly installed at the front end top of the special-shaped bracket, the displacement frame is fixedly installed with a first spring at the bottom of the side end close to the steel wire rope, the displacement frame is fixedly installed with a first clamping key at the bottom of the side end close to the steel wire rope, and the first clamping key is located behind the first spring, and an anti-dropping sheet is fixedly installed at one end of the first clamping key away from the displacement frame;

[0012] When the reel is rotating, the steel wire rope can be pulled to drive the displacement frame to move.

[0013] A manufacturing process of an assembled high-strength prefabricated floor slab comprises the following steps:

[0014] S1: Determine the size of precast panels and the grade of steel strands, and the mix ratio of ultra-high performance concrete according to design requirements;

[0015] S2: pouring of the lower concrete layer of the precast slab;

[0016] S3: After the lower concrete layer of the precast slab is poured and compacted, the steel strands are placed horizontally and smoothed with a metal spatula so that about % of the steel fibers are along the direction of the steel strands; keep the surface moist to prevent cold joints between layers;

[0017] S4: Use a tensioning machine to tension the steel strand on a pedestal or steel mold, and when it is tensioned to a controlled stress, temporarily anchor it with a clamp;

[0018] S5: pouring of the upper concrete layer of the precast slab is carried out ten minutes after the pouring of the lower concrete layer of the precast slab is completed;

[0019] S6: After the upper concrete layer of the precast slab is poured, it is compacted by tamping and vibrating, and then smoothed with a metal spatula;

[0020] S7: When the concrete reaches more than % of its design strength, release or cut off the excess steel strands to allow the steel strands to elastically retract.

[0021] Beneficial effects of the present invention:

[0022] First, the present invention arranges a steel strand between the lower concrete layer and the upper concrete layer of the precast slab, so that the strength of the lower concrete layer and the upper concrete layer of the precast slab when they are combined can be improved, and at the same time, by rotating the worm, the worm wheel and the second gear are driven to rotate, so that the rack can drive the alignment clamp to move to the steel bars on the external wall for fastening, so that the two sides of the upper concrete layer of the precast slab can be connected with the external steel bars, and the self-locking property between the worm and the worm wheel can prevent the alignment clamp from sliding again, thereby completing the work of synchronous auxiliary positioning of the side ends of the upper concrete layer of the precast slab.

[0023] Secondly, the present invention can drive the rack to pass through the first gear when the second gear rotates, so that the first gear and the winding wheel can be driven to rotate at the same time, so that the winding wheel can pull the displacement frame closer to the second hoop frame through the wire rope, so that the second hoop frame can be driven to contact the first hoop frame, and the steel bars that need to be added can be limited between the first hoop frame and the second hoop frame, and the displacement frame and the second hoop frame can both perform a linear docking action, thereby improving the docking accuracy of the displacement frame and the second hoop frame, and completing the work of quickly limiting the steel bars at the top of the upper concrete layer of the precast plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a front schematic diagram of the main body in the present invention;

[0026] Figure 2 It is a top view of the main figure in the present invention;

[0027] Figure 3It is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure from the front perspective of the second embodiment of the upper concrete layer of the precast panel in the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the side end positioning component in the present invention from a front perspective;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the displacement device of the present invention from the front perspective;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the transmission device of the present invention from the front perspective;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the top positioning component in the present invention from a front perspective;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the synchronization device in the present invention from the bottom perspective;

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure from the front perspective of the second embodiment of the support device in the present invention.

[0035] In the figure: 1-precast plate lower concrete layer, 2-precast plate upper concrete layer, 3-steel strand, 4-side end positioning component, 5-top positioning component, 6-displacement device, 7-transmission device, 8-rack, 9-hexagonal rod, 10-alignment card plate, 11-embedded rod, 12-extension frame, 13-winding wheel, 14-first gear, 15-second gear, 16-worm gear, 17-wire wheel, 18-support cross plate, 19-worm, 20-positioning base plate, 21-synchronizing device, 22-supporting device, 23-wire rope, 24-anti-slip sheet, 25-first card key, 26-special-shaped bracket, 27-first spring, 28-displacement frame, 29-first hoop frame, 30-second card key, 31-second spring, 32-lower edge plate, 33-top steel bar, 34-second hoop frame, 35-synchronizing rod. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] The present invention is further described below in conjunction with the accompanying drawings.

[0038] Example 1

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, an assembled high-strength prefabricated floor slab and its manufacturing process of the present invention include a lower concrete layer 1 of the prefabricated slab, a steel strand 3 is placed on the top of the lower concrete layer 1 of the prefabricated slab, and an upper concrete layer 2 of the prefabricated slab is cast on the top of the steel strand 3.

[0040] A manufacturing process of an assembled high-strength prefabricated floor slab comprises the following steps:

[0041] S1: Determine the size of the precast panel and the grade of the steel strand 3 and the mix ratio of the ultra-high performance concrete according to the design requirements;

[0042] S2: pouring of the lower concrete layer 1 of the precast slab;

[0043] S3: After the lower concrete layer 1 of the precast slab is poured and compacted, the steel strand 3 is placed horizontally and smoothed with a metal spatula so that about 90% of the steel fibers are along the direction of the steel strand 3; the surface is kept moist to prevent cold joints between layers;

[0044] S4: tensioning the steel strand 3 on a pedestal or steel mold using a tensioning machine, and temporarily anchoring it with a clamp after tensioning to a controlled stress;

[0045] S5: Ten minutes after the lower concrete layer 1 of the precast slab is poured, the upper concrete layer 2 of the precast slab is poured;

[0046] S6: After the upper concrete layer 2 of the precast slab is poured, the concrete is compacted by tamping and vibrating, and then smoothed with a metal spatula;

[0047] S7: When the concrete is cured to reach more than 75% of its design strength, the excess steel strands 3 are released or cut off to allow the steel strands 3 to elastically retract.

[0048] The working principle of Example 1 is as follows: when in use, ultra-high performance concrete is first poured inside an external mold to form a lower concrete layer 1 of the precast board. Subsequently, a vibrating device is used to compact and level the concrete at the bottom of the mold, and then the steel strands 3 are laid on the top surface of the lower concrete layer 1 of the precast board in a grid shape. Subsequently, the steel strands 3 are connected to an external tensioning machine so that the steel strands 3 can be located inside the mold in a taut state. Subsequently, ultra-high performance concrete is poured on the upper layer of the lower concrete layer 1 of the precast board to form an upper concrete layer 2 of the precast board. Subsequently, a vibrating device is used to compact and level it so that the upper concrete layer 2 of the precast board and the lower concrete layer 1 of the precast board can wrap the steel strands 3. After the lower concrete layer 1 of the precast board and the upper concrete layer 2 of the precast board are completely formed, the tensioning machine can be closed, and the excess steel strands 3 can be cut off to complete the work.

[0049] Example 2

[0050] On the basis of Example 1, Figure 4 , Figure 5 and Figure 7 As shown, the upper concrete layer 2 of the precast plate includes a side positioning component 4 and a top positioning component 5, the top positioning component 5 is fixedly installed on the top of the upper concrete layer 2 of the precast plate, the side positioning component 4 is fixedly installed on both sides of the upper concrete layer 2 of the precast plate, the side positioning component 4 includes a displacement device 6 and a transmission device 7, the displacement device 6 is fixedly installed at both ends of the transmission device 7, the transmission device 7 includes a worm gear 16, a supporting cross plate 18, a second gear 15 and a positioning base plate 20, the positioning base plate 20 is fixedly installed on the supporting cross plate 18 At the side end, a worm 19 is rotatably installed inside the positioning base plate 20, and a worm wheel 16 is rotatably installed at the side end center of the supporting cross plate 18, and the worm wheel 16 is meshed with the worm 19. The second gear 15 is fixedly installed at the side end center of the worm wheel 16 away from the supporting cross plate 18, and the supporting cross plate 18 is rotatably installed with two wire wheels 17 near the top of the second gear 15, and the inner top and bottom ends of the supporting cross plate 18 are rotatably installed with a winding wheel 13, and the winding wheel 13 is fixedly installed with a first gear 14 near the side end center of the second gear 15.

[0051] like Figure 6 The displacement device 6 includes an extension frame 12, an embedded rod 11 and a hexagonal rod 9. The embedded rod 11 is symmetrically fixed on one side of the extension frame 12, and the hexagonal rod 9 is slidably inserted inside the other side of the extension frame 12. The front end of the hexagonal rod 9 is fixedly installed with a positioning card plate 10, and the rear end of the hexagonal rod 9 is fixedly installed with a rack 8. The hexagonal rod 9 slides inside the extension frame 12, so that the positioning card plate 10 can be guaranteed to move in a straight line;

[0052] When the worm 19 rotates, it can drive the second gear 15 to rotate through the worm wheel 16, so that the two racks 8 can be displaced respectively.

[0053] like Figure 8 The top positioning component 5 includes a synchronization device 21 and a support device 22. The synchronization device 21 is symmetrically slidably inserted on the top of the support device 22 to support the synchronization device 21 to work.

[0054] like Fig. 9 The synchronization device 21 includes a displacement frame 28, a steel wire rope 23 and a special-shaped bracket 26. The special-shaped bracket 26 is fixedly mounted on one end of the steel wire rope 23. The displacement frame 28 is fixedly mounted on the front end top of the special-shaped bracket 26. A first spring 27 is fixedly mounted on the bottom of the side end of the displacement frame 28 close to the steel wire rope 23. A first clamping key 25 is fixedly mounted on the bottom of the side end of the displacement frame 28 close to the steel wire rope 23, and the first clamping key 25 is located behind the first spring 27. An anti-drop sheet 24 is fixedly mounted on one end of the first clamping key 25 away from the displacement frame 28. The anti-drop sheet 24 can prevent the first clamping key 25 from falling off.

[0055] When the winding wheel 13 rotates, the steel wire rope 23 can be pulled to drive the displacement frame 28 to move.

[0056] like Fig.10 The supporting device 22 includes a top steel bar 33, a first hoop frame 29, a lower edge plate 32 and a second spring 31. The first hoop frame 29 is fixedly installed at the top two ends of the top steel bar 33 at equal distances, and the lower edge plate 32 is fixedly installed at the bottom two ends of the top steel bar 33 at equal distances. The second spring 31 is fixedly installed at the center of one end of the lower edge plate 32 close to the first hoop frame 29. The second spring 31 is fixedly installed with a second clamping key 30 at one end away from the lower edge plate 32, and the second clamping key 30 is slidably inserted in the interior of the top steel bar 33. The top of the second clamping key 30 is fixedly installed with a second hoop frame 34, and a synchronization rod 35 is fixedly installed between the second hoop frames 34. Through the setting of the synchronization rod 35, when one second hoop frame 34 moves, multiple second hoop frames 34 can be driven to move;

[0057] When the first latch key 25 moves at the top end of the top reinforcing bar 33 , it can drive the displacement frame 28 to squeeze the second hoop frame 34 and the first hoop frame 29 closer.

[0058] The embedded rod 11 is embedded in both sides of the upper concrete layer 2 of the precast plate, the supporting cross plate 18 is fixedly installed between the two extension frames 12, the rack 8 is meshed with the second gear 15, and the end of the wire rope 23 away from the special-shaped bracket 26 is connected to the outer ring of the winding wheel 13, the first clamping key 25 is slidably inserted into the top end of the top steel bar 33 close to the first hoop frame 29, and the first clamping key 25 is located above the second spring 31, and the top steel bar 33 is embedded in the top end of the upper concrete layer 2 of the precast plate. The top steel bar 33 is close to the top end of the first hoop frame 29 and is respectively provided with transverse and longitudinal clamping grooves. The side end surface of the second hoop frame 34 is arranged in an arc state away from the first hoop frame 29, and the first hoop frame 29 and the second hoop frame 34 are opposite to each other. An arc groove is provided, and the end of the first spring 27 close to the anti-slip sheet 24 is connected to the top steel bar 33, and the alignment clamping plate 10 is arranged in a T-shape.

[0059] When implementing this embodiment, first operate the external lifting equipment to lift the upper concrete layer 2 of the precast panel to the roof as a whole. Then, when the alignment card plate 10 is aligned with the steel bars on the beam, the steel bars to be added can be placed between the first hoop frame 29 and the second hoop frame 34, and then the worm 19 is screwed and rotated. The worm 19 is meshed with the worm wheel 16, so that when the worm 19 rotates, it can drive the worm wheel 16 and the second gear 15 to rotate at the same time. The second gear 15 is meshed with the rack 8, so that when the second gear 15 rotates, it can drive the rack 8 to move. Moreover, when the rack 8 moves, it can drive the hexagonal rod 9 to slide inside the extension frame 12, thereby driving the alignment card plate 10 to move until the alignment card plate 10 is fastened to the steel bars on the beam, so that the alignment card plate 10 can be moved. The upper concrete layer 2 of the precast plate contacts the steel bars on the beam to prevent the upper concrete layer 2 of the precast plate from sliding and displacing again. At the same time, when the rack 8 moves, it can also pass through the first gear 14, thereby driving the first gear 14 to rotate. When the first gear 14 rotates, it can drive the winding wheel 13 to wind up and pull the wire rope 23 to drive the displacement frame 28 to move toward one end close to the anti-slip sheet 24, and slide in the groove inside the top of the top steel bar 33 through the first card key 25, so that the displacement frame 28 can be ensured to move in a straight line. The front end side of the displacement frame 28 is inclined at 45 degrees, so that when the displacement frame 28 moves toward one end close to the second hoop frame 34, the second hoop frame 34 can slowly approach the first hoop frame 29, and through the second The side end of the hoop frame 34 away from the first hoop frame 29 is arranged in an arc state, so that the smoothness of the displacement frame 28 passing through the second hoop frame 34 can be improved. When the front end surface of the displacement frame 28 moves to be vertically aligned with the second hoop frame 34, the second hoop frame 34 can be squeezed to move to fit with the first hoop frame 29. The first hoop frame 29 and the second hoop frame 34 are provided with arc holes on the opposite side ends, so that when the second hoop frame 34 and the first hoop frame 29 are fitted, the steel bar can be restricted between the second hoop frame 34 and the first hoop frame 29, and the second clamping key 30 slides in the clamping groove inside the top steel bar 33, so that the second hoop frame 34 can be ensured to move in a straight line, improve the docking accuracy of the second hoop frame 34 and the first hoop frame 29, and complete the work of synchronous positioning of the steel bars. When the device is in use, when the displacement frame 28 maintains a normal state, the elasticity of the first spring 27 will drive the displacement frame 28 to move toward the end away from the top steel bar 33 until the anti-drop sheet 24 is tightly fitted with the top steel bar 33, so that the displacement frame 28 and the second hoop frame 34 can be kept away from each other. At the same time, the elasticity of the second hoop frame 34 will pull the second hoop frame 34 to always move toward the end away from the first hoop frame 29, so that the external steel bars can be placed between the second hoop frame 34 and the first hoop frame 29. When the worm 19 is screwed and rotated, the worm wheel 16 can be driven to rotate, and there is a self-locking property between the worm wheel 16 and the worm 19, so that the rack 8 can be prevented from being loosened or displaced again. The alignment clamp 10 is tightly fitted with the steel bars on the beam.This can prevent the upper concrete layer 2 of the precast slab from sliding again, and the setting of the wire wheel 17 can facilitate the displacement of the displacement frame 28 by pulling the steel wire rope 23 in the horizontal direction. In addition, when the lower concrete layer 1 of the precast slab and the upper concrete layer 2 of the precast slab are poured, the embedded rod 11 can be installed inside the upper concrete layer 2 of the precast slab, so that the embedded rod 11 and the upper concrete layer 2 of the precast slab can be connected as a whole. In addition, the top steel bar 33 is installed on the top of the upper concrete layer 2 of the precast slab in the same way, so that the steel bars installed later can be connected to the top steel bar 33 as a whole. Finally, concrete can be poured again on the beam of the upper concrete layer 2 of the precast slab, so that the device can be connected to the beam as a whole to complete the work.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled high-strength prefabricated floor slab, comprising a prefabricated slab lower concrete layer (1), characterized in that: A steel strand (3) is placed on the top of the lower concrete layer (1) of the precast slab, and an upper concrete layer (2) of the precast slab is poured on the top of the steel strand (3); The upper concrete layer (2) of the precast plate comprises a side end positioning component (4) and a top end positioning component (5), wherein the top end positioning component (5) is fixedly mounted on the top of the upper concrete layer (2) of the precast plate, and the side end positioning component (4) is fixedly mounted on both sides of the upper concrete layer (2) of the precast plate, and the side end positioning component (4) comprises a displacement device (6) and a transmission device (7); The displacement device (6) is fixedly mounted at both ends of the transmission device (7); the transmission device (7) comprises a worm wheel (16), a supporting transverse plate (18), a second gear (15) and a positioning base plate (20); the positioning base plate (20) is fixedly mounted on the side end of the supporting transverse plate (18); a worm (19) is rotatably mounted inside the positioning base plate (20); the worm wheel (16) is rotatably mounted at the center of the side end of the supporting transverse plate (18), and the worm wheel (16) is meshed with the worm (19); The second gear (15) is fixedly mounted on the center of the side end of the worm gear (16) away from the supporting transverse plate (18); two guide wheels (17) are rotatably mounted on the top end of the supporting transverse plate (18) near the second gear (15); a winding wheel (13) is rotatably mounted on the top and bottom ends of the inner part of the supporting transverse plate (18); and a first gear (14) is fixedly mounted on the winding wheel (13) near the center of the side end of the second gear (15).

2. The assembled high-strength prefabricated floor slab according to claim 1, characterized in that: The displacement device (6) comprises an extension frame (12), an embedded rod (11) and a hexagonal rod (9), wherein the embedded rod (11) is symmetrically fixedly mounted on one side of the extension frame (12), and the hexagonal rod (9) is slidably inserted into the other side of the extension frame (12), an alignment clamping plate (10) is fixedly mounted on the front end of the hexagonal rod (9), and a rack (8) is fixedly mounted on the rear end of the hexagonal rod (9).

3. The assembled high-strength prefabricated floor slab according to claim 2 is characterized in that: When the worm (19) rotates, it can drive the second gear (15) to rotate via the worm wheel (16), so that the two racks (8) can be displaced respectively.

4. The assembled high-strength prefabricated floor slab according to claim 3 is characterized in that: The top end positioning component (5) comprises a synchronizing device (21) and a supporting device (22), wherein the synchronizing device (21) is symmetrically slidably plugged onto the top end of the supporting device (22).

5. The assembled high-strength prefabricated floor slab according to claim 4, characterized in that: The synchronization device (21) comprises a displacement frame (28), a steel wire rope (23) and a special-shaped bracket (26), wherein the special-shaped bracket (26) is fixedly mounted on one end of the steel wire rope (23), the displacement frame (28) is fixedly mounted on the front end top of the special-shaped bracket (26), and a first spring (27) is fixedly mounted on the bottom of the side end of the displacement frame (28) close to the steel wire rope (23).

6. The assembled high-strength prefabricated floor slab according to claim 5, characterized in that: A first latch key (25) is fixedly mounted on the bottom of the side end of the displacement frame (28) close to the steel wire rope (23), and the first latch key (25) is located behind the first spring (27). An anti-slip sheet (24) is fixedly mounted on one end of the first latch key (25) away from the displacement frame (28); when the winding wheel (13) rotates, it can pull the steel wire rope (23) to drive the displacement frame (28) to move.

7. A process for manufacturing an assembled high-strength prefabricated floor slab, comprising preparing the assembled high-strength prefabricated floor slab according to claim 1, characterized in that: It includes the following steps: S1: Determine the size of the precast panels and the grade of the steel strands (3) and the mix ratio of the ultra-high performance concrete according to the design requirements; S2: pouring the lower concrete layer (1) of the precast slab; S3: After pouring, the lower concrete layer (1) of the precast slab is vibrated and compacted, the steel strands (3) are placed horizontally, and smoothed with a metal spatula so that about 90% of the steel fibers are along the direction of the steel strands (3); the surface is kept moist to prevent cold joints between layers; S4: tensioning the steel strand (3) on a pedestal or steel form with a tensioning machine until the strand is tensioned to a controlled stress and then temporarily anchored with a clamp; S5: pouring of the upper concrete layer (2) of the precast slab is carried out ten minutes after the lower concrete layer (1) of the precast slab is poured; S6: After the upper concrete layer (2) of the precast slab is poured, it is compacted by tamping and vibrating, and then smoothed with a metal spatula; S7: When the concrete reaches 75% or more of its design strength, the excess steel strands (3) are released or cut off to allow the steel strands (3) to elastically retract.

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