High-strength prestressed laminated slab

Abstract

The utility model relates to the technical field of prestressed laminated slabs, and discloses a high-strength prestressed laminated slab, which comprises a bottom plate and a truss stiffening beam, the bottom plate comprises prestressed tendons and a bottom concrete layer, a plurality of prestressed tendons are laid in parallel, the bottom concrete layer is poured on the surfaces of the prestressed tendons to form the bottom plate, and the truss stiffening beam is arranged on the bottom plate. The truss reinforcing beam comprises a truss steel pipe and a connecting rib, the connecting rib is pre-buried in the bottom concrete layer, the upper portion of the connecting rib is of an annular structure, the truss steel pipe is inserted into the annular structure of the connecting rib, and the truss steel pipe and the connecting rib are detachably and fixedly connected through a fixing assembly. According to the laminated slab, the truss reinforcing beams are arranged on the upper side of the bottom layer plate, the overall bearing capacity is improved on the premise that the light self weight of the bottom layer plate is guaranteed, hoisting and transporting are convenient, after the bottom layer plate is installed, the truss steel pipes are detachable, longitudinal steel bars are conveniently laid on the upper side of the bottom layer plate, and the work of bar penetrating is omitted; therefore, the effect of conveniently laying the post-pouring layer reinforcing mesh is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed composite plates, in particular to a high-strength prestressed composite plate. Background Art

[0002] The market prospect of prestressed composite slab is broad, and its advantages include short construction period, material saving, reduced formwork usage, etc., and increased bearing capacity of the structure. The prior art announcement number is CN217128675U, which discloses a high-strength prestressed composite slab, including a lower cladding plate and an upper cladding plate, a plurality of longitudinal steel bars are arranged between the lower cladding plate and the upper cladding plate, a plurality of transverse steel bars are arranged on the upper surface of the plurality of longitudinal steel bars, and steel wire ropes are arranged at the positions where the plurality of longitudinal steel bars are connected to the plurality of transverse steel bars respectively, and a plurality of through holes are opened between the lower cladding plate and the upper cladding plate; by pouring a certain amount of cement into the template, and then placing the bound plurality of transverse steel bars and the plurality of longitudinal steel bars and the steel wire ropes on the upper surface of the cement in the template, the solidified cement is the lower cladding plate, and then pouring the cement into the template, and the cement poured again after solidification is the upper cladding plate, by arranging a plurality of transverse steel bars and a plurality of longitudinal steel bars bound by steel wire ropes, it is convenient to effectively increase the strength, and avoid the problem of low strength performance of the prestressed composite slab due to lack of reinforcement structure.

[0003] In actual use, in order to reduce the deadweight of the prestressed composite bottom plate and facilitate lifting and transportation, the existing prestressed composite slabs often reduce the thickness of the bottom formwork and add truss reinforcement beams on the bottom plate to increase the overall bearing capacity. The truss reinforcement beams are of steel pipe structure or concrete casting structure, but the truss reinforcement beams will affect the laying of the cast-in-place layer steel mesh, causing inconvenience to the reinforcement threading, which needs further improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength prestressed composite plate to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength prestressed composite slab, comprising a bottom slab and a truss reinforcement beam, the bottom slab comprising prestressed tendons and a bottom concrete layer, a plurality of prestressed tendons are laid in parallel, the bottom concrete layer is poured on the surface of the prestressed tendons to form the bottom slab, the truss reinforcement beam comprises a truss steel pipe and connecting tendons, the connecting tendons are pre-buried in the bottom concrete layer, the upper part of the connecting tendons is an annular structure, the truss steel pipe is inserted in the annular structure of the connecting tendons, and the truss steel pipe and the connecting tendons are detachably fixedly connected by a fixing assembly, the truss steel pipe is detachable, and the longitudinal steel bars are conveniently laid on the upper side of the bottom slab, eliminating the work of threading the tendons, thereby achieving the effect of facilitating the laying of the post-cast layer steel mesh.

[0006] In some embodiments, two bending portions are provided on the surface of the connecting reinforcement, and the bending portions are in a U-shaped ring structure. Several connecting reinforcements are laid in parallel on the upper side of the prestressed reinforcement, and the connecting reinforcements and the prestressed reinforcements are tied together by wire. The bending portions extend to the upper side of the underlying concrete layer, and the bending portions of the connecting reinforcements can be bent at an angle to facilitate adjustment of the height of the bending portions.

[0007] In some embodiments, the fixing assembly includes a support plate, a concave groove is provided on the upper surface of the support plate, the support plate is arranged on the lower side of the truss steel pipe, and the truss steel pipe is placed in the concave groove, two clamping bolts are threadedly inserted on the upper surface of the support plate, the bottom ends of the clamping bolts pass through the support plate, so that the bottom ends of the clamping bolts are pressed against the upper surface of the underlying concrete layer, a gasket is provided on the lower side of the support plate, a socket is provided on the upper surface of the gasket, the bottom end of the clamping bolt is inserted into the socket of the gasket, and the support plate is pressed against the truss steel pipe by turning the knob to clamp the bolts.

[0008] In some embodiments, a cast-in-place steel mesh is laid on the upper side of the bottom plate, and the cast-in-place steel mesh includes transverse steel bars and longitudinal steel bars. The longitudinal steel bars are arranged on the lower side of the truss steel pipe. A cast-in-place concrete layer is poured on the upper side of the bottom plate, and the cast-in-place concrete layer covers the surface of the cast-in-place steel mesh and the truss reinforcement beam. After removing the truss steel pipe, the cast-in-place steel mesh is laid, which can save the work of threading the truss reinforcement beam with the longitudinal steel bars, thereby achieving the effect of facilitating the laying of the post-cast steel mesh.

[0009] Beneficial Effects

[0010] The utility model provides a high-strength prestressed composite plate, which has the following beneficial effects:

[0011] 1. The high-strength prestressed composite slab increases the overall bearing capacity and facilitates its lifting and transportation by arranging truss reinforcement beams on the upper side of the bottom slab to ensure that the bottom slab has a small dead weight. After the bottom slab is installed, the truss steel pipe can be disassembled, which is convenient for laying the longitudinal steel bars on the upper side of the bottom slab, eliminating the work of threading the steel bars, thereby achieving the effect of facilitating the laying of the post-casting steel mesh.

[0012] 2. The high-strength prestressed composite plate is provided with connecting ribs, which are embedded in the bottom plate. The connecting ribs are provided with bending parts, and the truss steel pipes are inserted in the bending parts, so that the installation of the truss steel pipes is more convenient. Moreover, the bending parts of the connecting ribs can be bent at an angle, so that the height of the bending parts can be adjusted conveniently, which provides convenience for customizing composite plates of different thicknesses and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the bottom plate of the utility model;

[0014] Figure 2It is a schematic diagram of the overall side section structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the overall front section structure of the utility model;

[0016] Figure 4 This is a schematic diagram of laying the steel mesh for the cast-in-place layer;

[0017] Figure 5 It is a schematic diagram of the front view structure of the support plate.

[0018] In the figure: 1 bottom plate, 2 truss reinforcement beam, 3 prestressed tendons, 4 bottom concrete layer, 5 truss steel pipe, 6 connecting tendons, 7 bending part, 8 support plate, 9 fastening bolts, 10 gaskets, 11 sockets, 12 transverse steel bars, 13 longitudinal steel bars, 14 cast-in-place concrete layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 The utility model provides a technical solution: a high-strength prestressed composite plate, including a bottom plate 1 and a truss reinforcement beam 2, the bottom plate 1 includes prestressed tendons 3 and a bottom concrete layer 4, a plurality of prestressed tendons 3 are laid in parallel, the bottom concrete layer 4 is poured on the surface of the prestressed tendons 3 to form the bottom plate 1, the truss reinforcement beam 2 includes a truss steel pipe 5 and connecting tendons 6, the connecting tendons 6 are pre-buried in the bottom concrete layer 4, the upper part of the connecting tendons 6 is annular, the truss steel pipe 5 is inserted in the annular structure of the connecting tendons 6, and the truss steel pipe 5 and the connecting tendons 6 are detachably fixedly connected through a fixing assembly.

[0021] Specifically, two bending portions 7 are provided on the surface of the connecting reinforcement 6, and the bending portion 7 is a U-shaped ring structure. Several connecting reinforcements 6 are laid in parallel on the upper side of the prestressed reinforcement 3, and the connecting reinforcement 6 and the prestressed reinforcement 3 are tied together by wire. The bending portion 7 extends to the upper side of the underlying concrete layer 4.

[0022] The fixing assembly includes a support plate 8, the upper surface of which is provided with a concave groove. The support plate 8 is arranged on the lower side of the truss steel pipe 5, and the truss steel pipe 5 is placed in the concave groove. Two tightening bolts 9 are threadedly inserted on the upper surface of the support plate 8, and the bottom end of the tightening bolt 9 passes through the support plate 8, so that the bottom end of the tightening bolt 9 is tightened against the upper surface of the underlying concrete layer 4.

[0023] A gasket 10 is provided on the lower side of the support plate 8, and a plug hole 11 is provided on the upper surface of the gasket 10. The bottom end of the tightening bolt 9 is inserted into the plug hole 11 of the gasket 10. When the truss steel pipe 5 is inserted into the bending portion 7, the support plate 8 presses the truss steel pipe 5 upward. Figure 1 shown.

[0024] By setting the connecting rib 6, the connecting rib 6 is pre-buried in the bottom plate 1, and a bending portion 7 is provided on the connecting rib 6, and the truss steel pipe 5 is inserted in the bending portion 7, so that the installation of the truss steel pipe 5 is more convenient, and the bending portion 7 of the connecting rib 6 can be bent at an angle, so that the height of the bending portion 7 is conveniently adjusted, which provides convenience for customizing composite plates of different thicknesses and is more practical.

[0025] Installation process: The lifting rope is tied to the truss steel pipe 5, and the bottom plate 1 is lifted for transportation and installation. When each bottom plate 1 is installed to the predetermined position, the support plate 8 and the truss steel pipe 5 are taken out. A cast-in-place steel mesh is laid on the upper side of the bottom plate 1. The cast-in-place steel mesh includes transverse steel bars 12 and longitudinal steel bars 13. Figure 4 As shown, the truss steel pipe 5 and the support plate 8 are then installed again, so that the longitudinal steel bars 13 are arranged on the lower side of the truss steel pipe 5, and finally a cast-in-place concrete layer 14 is poured on the upper side of the bottom plate 1, and the cast-in-place concrete layer 14 covers the surface of the cast-in-place steel mesh and the truss reinforcement beam 2.

[0026] The high-strength prestressed composite slab increases the overall bearing capacity and facilitates its lifting and transportation by arranging a truss reinforcement beam 2 on the upper side of the bottom slab 1 to ensure that the bottom slab 1 has a relatively small dead weight. After the bottom slab 1 is installed, the truss steel pipe 5 can be disassembled to facilitate laying the longitudinal steel bars 13 on the upper side of the bottom slab 1, eliminating the need for the longitudinal steel bars 13 to penetrate the truss reinforcement beam 2, thereby achieving the effect of facilitating the laying of the post-casting layer steel mesh.

[0027] 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. A high-strength prestressed composite slab, comprising a bottom slab (1) and a truss reinforcement beam (2), characterized in that: The bottom plate (1) comprises prestressed tendons (3) and a bottom concrete layer (4), wherein a plurality of prestressed tendons (3) are laid in parallel, and the bottom concrete layer (4) is poured on the surface of the prestressed tendons (3) to form the bottom plate (1); the truss reinforcement beam (2) comprises a truss steel pipe (5) and connecting tendons (6), wherein the connecting tendons (6) are pre-buried in the bottom concrete layer (4), and the upper part of the connecting tendons (6) is an annular structure, and the truss steel pipe (5) is inserted into the annular structure of the connecting tendons (6), and the truss steel pipe (5) and the connecting tendons (6) are detachably fixedly connected through a fixing assembly.

2. A high-strength prestressed composite plate according to claim 1, characterized in that: Two bending portions (7) are provided on the surface of the connecting rib (6), and the bending portions (7) are in a U-shaped ring structure.

3. The high-strength prestressed composite plate according to claim 2, characterized in that: The plurality of connecting bars (6) are laid in parallel on the upper side of the prestressed bars (3), and the connecting bars (6) and the prestressed bars (3) are tied together by means of binding wires, and the bent portion (7) extends to the upper side of the bottom concrete layer (4).

4. The high-strength prestressed composite plate according to claim 3, characterized in that: The fixing assembly comprises a support plate (8), the upper surface of the support plate (8) is provided with a concave groove, the support plate (8) is arranged on the lower side of the truss steel pipe (5), and the truss steel pipe (5) is placed in the concave groove.

5. The high-strength prestressed composite plate according to claim 4, characterized in that: Two tightening bolts (9) are threadedly inserted into the upper surface of the support plate (8), and the bottom ends of the tightening bolts (9) penetrate the support plate (8) so that the bottom ends of the tightening bolts (9) are pressed against the upper surface of the bottom concrete layer (4).

6. The high-strength prestressed composite plate according to claim 5, characterized in that: A gasket (10) is arranged on the lower side of the support plate (8), an insertion hole (11) is opened on the upper surface of the gasket (10), and the bottom end of the tightening bolt (9) is inserted into the insertion hole (11) of the gasket (10).

7. The high-strength prestressed composite plate according to claim 6, characterized in that: A cast-in-place steel mesh is laid on the upper side of the bottom slab (1), and the cast-in-place steel mesh includes transverse steel bars (12) and longitudinal steel bars (13), and the longitudinal steel bars (13) are arranged on the lower side of the truss steel pipe (5).

8. The high-strength prestressed composite plate according to claim 7, characterized in that: A cast-in-place concrete layer (14) is poured on the upper side of the bottom slab (1), and the cast-in-place concrete layer (14) covers the surface of the cast-in-place steel mesh and the truss reinforcement beam (2).

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