Supporting-free plate and long-line production die thereof

Abstract

The support-free plate and long-line production mold comprises a prefabricated plate body, a plurality of trusses are arranged on the upper side of the prefabricated plate body in parallel at intervals, prefabricated plate strips are arranged on the trusses, and the prefabricated plate strips are parallel to the prefabricated plate body; a steel reinforcement framework is arranged in the prefabricated slab body and comprises prestressed steel bars consistent with the extension direction of the truss and constructional steel bars perpendicular to the extension direction of the truss, and the multiple prestressed steel bars and the multiple constructional steel bars are arranged at intervals and arranged in a staggered mode in a grid shape. The truss is arranged to be combined with the prestressed steel bars extending in the same direction, so that the prefabricated slab body has sufficient strength and rigidity to be directly supported between the two building beams, the arrangement and dismantling work of a supporting structure is omitted, and the building efficiency of the prefabricated slab is improved; in addition, through the arrangement of the prefabricated slab, the supporting performance of the truss on the prefabricated slab body is further enhanced, and the applicable span range of the supporting plate is widened.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a support-free plate and its long-line production mold. Background Technology

[0002] Prefabricated buildings refer to buildings where a large amount of on-site work in traditional construction methods is transferred to factories. Building components and accessories, such as floor slabs, wall panels, stairs, and balconies, are prefabricated in factories, transported to the construction site, and assembled on-site using reliable connection methods. This method helps to save resources and energy, reduce construction pollution, and improve labor productivity and quality and safety levels.

[0003] Patent document CN113047494A discloses a precast concrete composite slab, comprising a rectangular slab with a reinforcing groove parallel to the upper end face of the slab. Two end faces of the slab perpendicular to the reinforcing groove have dovetail grooves laterally. The reinforcing groove has an inverted T-shaped cross-section and contains a truss reinforcement assembly. The truss reinforcement assembly includes vertical bars and tie bars. The vertical bars are arranged longitudinally and have a reinforcing bent end at the bottom, extending into the slab. The tie bars are arranged parallel to the slab. The advantages of this invention compared to existing technologies are: clear structure, ease of use; as a floor slab, it eliminates the need for formwork; the design of the truss reinforcement assembly and reinforcing groove ensures a strong bond between the post-cast concrete layer and the precast component layer; lightweight filler makes the overall component lighter; the truss reinforcement assembly can be directly used for hoisting; the hidden beams with added reinforcing bars increase tensile, compressive, and flexural strength; the structure is stable and construction is quick and convenient.

[0004] In existing precast concrete slabs, when the span of the slab reaches a certain size, it is usually necessary to first build supports to support the slab during construction. After the concrete layer is poured and the slab is shaped, the supports need to be removed. Therefore, there is an urgent need for a support-free slab and its long-line production mold to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a support-free plate and its long-line production mold to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A supportless slab includes a precast slab body with multiple trusses arranged parallel to each other on the upper side of the precast slab body. Precast strips are arranged on the trusses, and the precast strips are arranged parallel to the precast slab body. A steel reinforcement skeleton is provided inside the precast slab body. The steel reinforcement skeleton includes prestressed steel bars that are aligned with the extension direction of the trusses and structural steel bars that are perpendicular to the extension direction of the trusses. Multiple prestressed steel bars and structural steel bars are arranged at intervals and are staggered in a grid pattern.

[0008] Preferably, the precast slats are fixedly installed on the top of the truss, and the precast slats are concrete rectangular ribs or rectangular steel pipes, with the rectangular steel pipes filled with high-strength grout.

[0009] Preferably, the precast slats are fixedly installed on the part of the truss close to the precast slab, and the precast slats are concrete rectangular ribs.

[0010] A long-line production mold for producing the aforementioned supportless plate includes a mold platform and further includes: two first side molds symmetrically arranged at parallel intervals on the mold platform; two second side molds symmetrically arranged at parallel intervals on two other opposite sides of the mold platform, forming a grouting area with the two first side molds; support holes formed on the second side molds for passing through and supporting prestressed steel bars; and a sealing plate fitted against the outer wall of the second side molds to cover the support holes and fixed in position by fastening components.

[0011] Preferably, the lower end of the sealing plate is provided with a groove that matches the prestressed steel bars.

[0012] Preferably, the fastening assembly includes a bolt head disposed on the outer wall of the second side mold, a hanging hole that matches the bolt head disposed on the sealing plate, the lower end of the hanging hole extending to the lower end of the sealing plate, and a nut connected to the end of the bolt head.

[0013] Preferably, a height limiting block is provided at the upper end of the second side mold, and the upper end of the sealing plate is wedge-shaped with the height limiting block. As the sealing plate gets closer to the second side mold, the sealing plate is pressed downward by the height limiting block.

[0014] Preferably, the height limiting block is rotatably connected to the second side mold, and the second side mold is provided with a limiting component for holding the height limiting block in the position of pressing the sealing plate.

[0015] Preferably, the limiting component includes a stop block that is movably and vertically arranged on the second side mold, and a push rod that slides through the lower end of the second side mold is fixedly provided at the lower end of the stop block.

[0016] Preferably, the lower end of the sealing plate is elastically hinged to a pressure plate, and the sealing plate is provided with a triggering component for linking the free end of the pressure plate to swing down to compress the prestressed steel bars. The triggering component is triggered when the sealing plate is in close contact with the second side mold.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This supportless slab, by setting up a truss combined with prestressed steel bars extending in the same direction, enables the precast slab to have sufficient strength and rigidity to be directly supported between two building beams. This eliminates the need for setting up and dismantling the support structure, thus improving the construction efficiency of the precast slab. In addition, the setting of precast slab strips further strengthens the support of the truss for the precast slab and expands the applicable span range of the support slab.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the supportless plate of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a second embodiment of the supportless plate of the present invention;

[0024] Figure 3 This is a structural schematic diagram of a third embodiment of the support-free plate of the present invention;

[0025] Figure 4 This is a schematic diagram of the mold structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0027] Figure 6 This is a partial side cross-sectional view of the support hole of the mold of the present invention.

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0029] Figure 8 This is a partial side cross-sectional view of the hanging hole of the mold of the present invention.

[0030] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C;

[0031] Figure 10 This is a partial side cross-sectional view of the trigger element of the mold of the present invention.

[0032] Figure 11 For the present invention Figure 10 A magnified structural diagram at point D.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Precast slab; 2. Truss; 3. Precast strips; 4. Prestressed steel bars; 5. Mold table; 6. First side mold; 7. Second side mold; 8. Support hole; 9. Sealing plate; 10. Groove; 11. Bolt head; 12. Hanging hole; 13. Nut; 14. Height limit block; 15. Abutment block; 16. Top rod; 17. Pressure plate; 18. Trigger; 19. Linkage component. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0036] Please see Figure 1-11 The present invention provides a supportless slab, comprising a precast slab body 1, wherein a plurality of trusses 2 are arranged parallel to each other on the upper side of the precast slab body 1, and precast strips 3 are arranged on the trusses 2, the precast strips 3 being arranged parallel to the precast slab body 1; a steel reinforcement skeleton is provided inside the precast slab body 1, the steel reinforcement skeleton including prestressed steel bars 4 consistent with the extension direction of the trusses 2 and structural steel bars perpendicular to the extension direction of the trusses 2, wherein a plurality of prestressed steel bars 4 and structural steel bars are arranged at intervals and are arranged in a grid pattern.

[0037] Specifically, the precast slab 1 is made of concrete and is rectangular; the precast strips 3 are long rectangular strips; the lower end of the truss 2 is anchored within the precast slab 1; the reinforcing steel skeleton is anchored within the concrete solid of the precast slab 1; the prestressed steel bars 4 extend from both ends beyond the end faces of the precast slab 1 and are raised upwards in the middle; multiple prestressed steel bars 4 are evenly arranged within the precast slab 1 along the vertical direction of the truss 2; multiple structural steel bars are evenly arranged within the precast slab 1 along the extension direction of the truss 2; furthermore, the structural steel bars have a higher density near the edge of the precast slab 1. In practical use, this technical solution, through the truss 2 combined with the prestressed steel bars 4 extending in the same direction, enables the precast slab 1 to have sufficient strength and rigidity to be directly supported between two building beams, thereby eliminating the need for setting up and dismantling the supporting structure and improving the construction efficiency of the precast slab; in addition, the setting of the precast strips 3 further strengthens the support of the truss 2 for the precast slab 1, increasing the applicable span range of the supporting slab.

[0038] Compared with the prior art, the supportless slab proposed in this embodiment of the invention, by setting up a truss 2 in combination with prestressed steel bars 4 extending in the same direction, can give the precast slab 1 sufficient strength and rigidity to be directly supported between two building beams, thereby eliminating the need for setting up and dismantling the support structure and improving the construction efficiency of the precast slab; in addition, by setting up the precast slab strips 3, the support of the truss 2 for the precast slab 1 is further strengthened, and the applicable span range of the support slab is improved.

[0039] As a preferred technical solution in this embodiment, the precast strip 3 is fixedly installed on the top of the truss 2. The precast strip 3 is a concrete rectangular rib or a rectangular steel pipe, and the inside of the rectangular steel pipe is filled with high-strength grout. Specifically, the precast strip 3 is a concrete rectangular rib and is anchored to the top of the truss 2, which is the first embodiment of the support-free plate; the precast strip 3 is a rectangular steel pipe filled with high-strength grout and welded to the top of the truss 2, which is the second embodiment of the support-free plate. By setting the precast strip 3 on the top of the truss 2, a standard floor height is formed at the upper end of the truss 2, which makes it convenient to accurately find the floor height when pouring the concrete layer. Moreover, when the precast plates are stacked and transported, the support area of ​​the precast strip 3 is significantly larger than the support area of ​​the conventional truss for the upper precast plates, which better prevents the plates from cracking during transportation.

[0040] As a preferred technical solution in this embodiment, the precast strip 3 is fixedly installed on the part of the truss 2 close to the precast slab 1. The precast strip 3 is a concrete rectangular rib. Specifically, the precast strip 3 is a concrete rectangular rib and is anchored in the position close to the precast slab 1. This is the third embodiment of the support plate-free method. During the precast production process of the precast slab 1, the precast strip 3 and the precast strip 3 are bonded together. By setting the precast strip 3 close to the precast slab 1, the overall support of the truss 2 and the precast strip 3 for the precast slab 1 is further enhanced, and the applicable span range of the support plate is greatly improved.

[0041] A long-line production mold for producing the aforementioned supportless plate includes a mold base 5 and further includes: two first side molds 6, which are symmetrically arranged at parallel intervals on the mold base 5; two second side molds 7, which are symmetrically arranged at parallel intervals on two other opposite sides of the mold base 5, and which together with the two first side molds 6 form a grouting area; support holes 8, which are formed on the second side molds 7 for prestressed steel bars 4 to pass through and support them; and a sealing plate 9, which is fitted against the outer wall of the second side molds 7 to cover the support holes 8 and is fixed in position by fastening components.

[0042] Specifically, the mold platform 5 is horizontally set on the production line and can be moved according to the production line process. The flatness error of the upper surface of the mold platform 5 is less than 2mm. The first side mold 6 corresponds to one side of the precast slab in the direction of parallel truss 2, and its length is consistent with the length of the precast slab 1. The second side mold 7 corresponds to one side of the precast slab in the direction of vertical truss 2, and its length is greater than the width of the precast slab 1. The two first side molds 6 are set against the inside of the two second side molds 7, and the distance between the two first side molds 6 is consistent with the width of the precast slab 1. Before pouring concrete, the mold platform 5, the first side mold 6 and the second side mold 7 are all coated with a release agent. The grouting area is the internal area of ​​the rectangular frame formed by the two first side molds 6 and the two second side molds 7. The height of the grouting area is greater than the thickness of the precast slab 1. The grouting area is used to form the precast slab 1. The support holes 8 are U-shaped and multiple of them are evenly distributed along the lateral extension direction of the second side mold 7. The support holes 8 are matched one by one with the prestressed steel bars 4, and the diameter of the lowest hole matches the cross-sectional diameter of the prestressed steel bar 4. The upper end of the support hole 8 is connected to the upper end of the second side mold 7 to achieve an open structure. The prestressed steel bar 4 can be inserted into the support hole 8 by lowering it and supported by the support hole 8, thereby forming a preset height of the prestressed steel bar 4 relative to the upper surface of the mold table 5. This corresponds to the fact that after the precast slab 1 is formed, there is a concrete layer of sufficient thickness under the prestressed steel bar 4. The sealing plate 9 is set on the upper side of the prestressed steel bar 4. The lower end of the sealing plate 9 is provided with a groove 10 that matches the prestressed steel bar 4. The groove 10 and the support hole 8 limit the prestressed steel bar 4 by clamping it from above and below. When the sealing plate 9 is in contact with the second side mold 7, the groove 10 and the support hole 8 clamp the prestressed steel bar 4 from above and below, so that the support hole 8 can be fully covered by the sealing plate 9, thereby preventing the leakage of concrete slurry at the support hole 8. The fastening component is used to fix the sealing plate 9 tightly against the outer wall of the second side mold 7. In practical use, after the first side mold 6 and the second side mold 7 form a grouting area on the mold platform 5, the first side mold 6 and the second side mold 7 are fixed on the mold platform 5 by multiple magnetic boxes to maintain the stability of the grouting area. Then, the prestressed steel bar 4 is lowered and embedded and supported in the support hole 8. Thus, the prestressed steel bar 4 is suspended in the grouting area. Next, the sealing plate 9 is attached to the outer wall of the second side mold 7, and the groove 10 is kept in correspondence with the prestressed steel bar 4. Then, the sealing plate 9 is tightly fixed on the second side mold 7 by fastening components. Thus, the support hole 8 and the groove 10 cooperate to surround the prestressed steel bar 4, and the sealing plate 9 fully covers the support hole 8 to prevent grout leakage.

[0043] As a preferred technical solution in this embodiment, the fastening assembly includes a bolt head 11 disposed on the outer wall of the second side mold 7, and a hanging hole 12 on the sealing plate 9 that matches the bolt head 11. The lower end of the hanging hole 12 extends to the lower end of the sealing plate 9. A nut 13 is connected to the end of the bolt head 11. Specifically, the bolt head 11 is disposed perpendicular to the outer wall of the second side mold 7. The hanging hole 12 is inverted U-shaped. The sealing plate 9 is lowered so that the bolt head 11 is inserted into the hanging hole 12, and the sealing plate 9 is positioned simultaneously to achieve the correspondence between the groove 10 and the prestressed steel bar 4. The nut 13 is used to press the sealing plate 9 onto the outer wall of the second side mold 7.

[0044] In another embodiment of the present invention, a height limiting block 14 is provided at the upper end of the second side mold 7, and the upper end of the sealing plate 9 is wedge-shaped with the height limiting block 14. As the sealing plate 9 gets closer to the second side mold 7, the sealing plate 9 is more compressed downward by the height limiting block 14. Specifically, the fastening assembly only allows the sealing plate 9 to be fixed tightly against the second side mold 7, but cannot ensure that the groove 10 on the sealing plate 9 and the support hole 8 tightly clamp the prestressed steel bar 4 from the top and bottom. This embodiment solves this problem. The height limiting block 14 extends outward from the upper end of the second side mold 7 to cover the upper side of the installation position of the sealing plate 9; the lower surface of the end of the height limiting block 14 that covers the installation position of the sealing plate 9 is preferably inclined, and the height of the inclined surface decreases as it moves inward; the shape of the hanging hole 12 is designed so that the sealing plate 9 has the function of moving up and down relative to the second side mold 7 during the process of being fixed by the fastening assembly. In practical use, after the bolt head 11 is inserted into the hanging hole 12 and the sealing plate 9 is supported on the bolt head 11, the nut 13 is screwed on the end of the bolt head 11. Then, the sealing plate 9 is pushed close to the second side mold 7, so that the sealing plate 9 moves to the lower side of the height limiting block 14. Then, the nut 13 is continuously tightened. While the nut 13 pushes the sealing plate 9 close to the second side mold 7, it causes the sealing plate 9 and the height limiting block 14 to be wedge-shaped, so that the sealing plate 9 drops a small height relative to the second side mold 7. Thus, the groove 10 and the support hole 8 cooperate to clamp the prestressed steel bar 4.

[0045] In another embodiment of the present invention, the height limiting block 14 is rotatably connected to the second side mold 7. The second side mold 7 is provided with a limiting component for holding the height limiting block 14 in the position of pressing the sealing plate 9. Specifically, in actual production, the second side mold 7 is provided through the U-shaped support hole 8. When demolding, after the precast slab is lifted to a certain height, the second side mold 7 can be hammered down to detach the second side mold 7 from the precast slab. The prestressed steel bar 4 can also leave smoothly through the support hole 8. However, after adding the sealing plate 9 and the height limiting block 14, the height limiting block 14 limits the sealing plate 9, and the sealing plate 9 limits the prestressed steel bar 4 to leave the support hole 8 upward, which causes difficulties in subsequent demolding. This embodiment is proposed to solve this problem. The two ends of the rotation range of the height limiting block 14 are respectively positioned so that its free end is blocked above the installation position of the sealing plate 9 or so that its free end is tilted upward to completely move away from the installation position of the sealing plate 9. The limiting component restricts the rotation of the height limiting block 14 to keep the height limiting block 14 in the position where its free end is blocked above the installation position of the sealing plate 9. When the limiting component cancels the limiting, the height limiting block 14 resumes free rotation, and the upward movement of the sealing plate 9 relative to the second side mold 7 can directly push the height limiting block 14 to separate.

[0046] As a preferred technical solution in this embodiment, the limiting component includes a stop block 15 that is movably and vertically mounted on the second side mold 7. A push rod 16 that slides through the lower end of the second side mold 7 is fixedly mounted on the lower end of the stop block 15. Specifically, a retraction groove matching the stop block 15 is provided on the upper end of the second side mold 7, avoiding the support hole 8. When the stop block 15 extends upward into the retraction groove, one end of the rotating shaft of the height limiting block 14 abuts against the side wall of the stop block 15, thereby keeping the height limiting block 14 in a position where its free end is covered above the installation position of the sealing plate 9. When the stop block 15 is completely retracted into the retraction groove, one end of the rotating shaft of the height limiting block 14 is not obstructed, and the height limiting block 14 can rotate and tilt away from the installation position of the sealing plate 9. The push rod 16 is preferably a cylindrical rod with an enlarged lower diameter, thereby limiting its movement on the second side mold 7. When the stop block 15 is completely retracted into the retraction groove, the push rod 16 moves downward. The bottom of the second side mold 7 extends out, and when the lower end of the second side mold 7 is supported on the mold table 5, the lower end of the push rod 16 is also supported on the mold table 5. This causes the abutment block 15 to be lifted up to extend upward into the retraction groove and maintain its height. In other words, when the second side mold 7 is fixed on the mold table 5, the abutment block 15 extends out of the top of the second side mold 7 to limit the rotation of the height limiting block 14, so that the height limiting block 14 is kept in a blocking position that can produce a wedge-shaped fit with the sealing plate 9. During the demolding process of the precast beam, when the second side mold 7 is lifted with the precast beam, the abutment block 15 can be moved down and retracted into the top of the second side mold 7, thereby restoring the upward rotation function of the height limiting block 14. Furthermore, when the second side mold 7 is hammered downward, the relative movement between the sealing plate 9 and the second side mold 7 can directly push the height limiting block 14 away, thereby not affecting the demolding of the second side mold 7. The prestressed steel bar 4 can smoothly leave the support hole 8 while pushing the sealing plate 9. It should also be noted that before demolding, the nut 13 should be tightened in advance to ensure that the sealing plate 9 can move relative to the second side mold 7; after the second side mold 7 leaves the mold table 5, if the abutment block 15 cannot descend under its own weight, the abutment block 15 can be hammered downwards first.

[0047] In another embodiment of the present invention, a pressure plate 17 is elastically hinged to the lower end of the sealing plate 9. A triggering component is provided on the sealing plate 9 for linking the free end of the pressure plate 17 to swing downward to compress the prestressed steel bar 4. The triggering component is triggered when the sealing plate 9 is in close contact with the second side mold 7. Specifically, the pressure plate 17 is elastically hinged to the lower end of the sealing plate 9 so that the pressure plate 17 is automatically kept in an L-shaped state with the sealing plate 9. When the groove 10 is just engaged with the upper side of the prestressed steel bar 4, the bottom surface of the pressure plate 17 is also close to the prestressed steel bar 4. The setting of the triggering component allows the sealing plate 9 to trigger the free end of the pressure plate 17 to swing downward when it is in close contact with the second side mold 7, thereby pressing down on the end of the prestressed steel bar 4. Thus, under the combined action of the pressure plates 17 on both sides of the second side mold 7, both ends of the prestressed steel bar 4 are pressed down, thereby causing the prestressed steel bar 4 to produce deformation and stress with a raised middle section. As a result, after the precast slab is shaped, the prestressed steel bar 4 with a raised middle section can have better support performance. In addition, the pressure plate 17 is provided with a slot that communicates with the hanging hole 12, so that the bolt head 11 can pass through when it moves up and down relative to the sealing plate 9.

[0048] As a preferred technical solution of this embodiment, the triggering component includes a triggering element 18 that is movably disposed through the sealing plate 9. A linkage element 19 is hinged to one end of the triggering element 18 away from the second side mold 7, and the other end of the linkage element 19 is hinged to the pressure plate 17. Specifically, the triggering element 18 is vertically and movably disposed through the sealing plate 9. Under the condition that the pressure plate 17 is not affected by external force, the pressure plate 17 links the position of the triggering element 18 through the linkage element 19, so that the end of the triggering element 18 near the second side mold 7 extends out of the surface of the sealing plate 9 by a certain length. Then, when the sealing plate 9 is in close contact with the second side mold 7, the end of the triggering element 18 near the second side mold 7 abuts against the outer wall of the second side mold 7, so that it is forced to move away from the second side mold 7 relative to the sealing plate 9. Then, the linkage element 19 pushes the pressure plate 17, so that the free end of the pressure plate 17 generates downward swing and pressure, which is applied to the end of the prestressed steel bar 4. Then, under the synchronous downward pressure of the pressure plates 17 at both ends, the deformation of the prestressed steel bar 4 in the middle is realized, which produces the effect of improving support.

[0049] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A free-supporting slab, comprising a prefabricated slab body (1), a plurality of trusses (2) are arranged in parallel and spaced apart on the upper side of the prefabricated slab body (1), characterized in that, The truss (2) is provided with prefabricated slats (3), which are arranged in parallel with the prefabricated slab (1); the prefabricated slab (1) is provided with a steel reinforcement framework, which comprises prestressed steel bars (4) extending in the same direction as the truss (2) and construction steel bars extending perpendicularly to the truss (2); the prestressed steel bars (4) and the construction steel bars are both arranged in multiple and staggered in a grid pattern.

2. The free standing sheet of claim 1, wherein, The prefabricated slats (3) are fixedly arranged on the top of the truss (2), and the prefabricated slats (3) are concrete rectangular ribs or rectangular steel pipes filled with high-strength slurry.

3. The free standing sheet of claim 1, wherein, The prefabricated slats (3) are fixedly arranged on the part of the truss (2) close to the prefabricated slab (1), and the prefabricated slats (3) are concrete rectangular ribs.

4. A long wire production mold for producing the support-free plate according to any one of claims 1 to 3, comprising a mold table (5), characterized in that, Further comprising: The first side mold (6) is symmetrically arranged in parallel and spaced apart on the mold table (5); The second side mold (7) is symmetrically arranged in parallel and spaced apart on the other two opposite sides of the mold table (5), and forms a grouting area with the two first side molds (6); The support hole (8) is provided on the second side mold (7) for the prestressed steel bar (4) to pass through and support it; The sealing plate (9) is arranged to block the support hole (8) by matching the outer wall of the second side mold (7), and the position is fixed by the fastening assembly.

5. The long line production mold of claim 4, wherein, The lower end of the sealing plate (9) is provided with a groove (10) matched with the prestressed steel bar (4).

6. The long line production mold of claim 4, wherein, The fastening assembly comprises a bolt head (11) provided on the outer wall of the second side mold (7), and a hanging hole (12) matched with the bolt head (11) is provided on the sealing plate (9), the lower end of the hanging hole (12) extends to the lower end of the sealing plate (9), and the end of the bolt head (11) is connected with a nut (13).

7. The long line production mold of claim 4, wherein, The upper end of the second side mold (7) is provided with a height limiting block (14), and the upper end of the sealing plate (9) is wedge-shaped matched with the height limiting block (14), and the closer the sealing plate (9) is to the second side mold (7), the more the sealing plate (9) is pressed downward by the height limiting block (14).

8. The long line production mold of claim 7, wherein, The height limiting block (14) is rotatably connected to the second side mold (7), and the second side mold (7) is provided with a limiting assembly for keeping the height limiting block (14) in the position of pressing the sealing plate (9).

9. The long line production mold of claim 8, wherein, The limiting assembly comprises a resisting block (15) movably arranged on the second side mold (7), and the lower end of the resisting block (15) is fixedly provided with a top rod (16) slidingly penetrating the lower end of the second side mold (7).

10. The long line production mold of claim 7, wherein, The lower end of the sealing plate (9) is elastically hinged with a pressing plate (17), and the sealing plate (9) is provided with a trigger assembly for linkage of the free end of the pressing plate (17) to lower to press the prestressed steel bar (4), and the trigger assembly is triggered when the sealing plate (9) is close to the second side mold (7).

Images