UHPC rib prestressed composite slab

Abstract

The utility model discloses a UHPC rib prestressed composite board, it includes: by upper chord, web, connecting piece, prestressed reinforcement constitutes truss, and the web lower part, connecting piece, prestressed reinforcement are buried in its inside prefabricated bottom plate, the upper chord has two and parallelly arranged, is equipped with a plurality of short muscle that will two upper chords fixed between upper chord, and the upper chord is poured into rib by UHPC outside, the web is symmetrically arranged on the both sides of upper chord, and the web is wavy, and the wave crest is fixed with upper chord, and the wave trough is provided with the through hole that passes through up and down, the connecting piece whole body adopts metal material to be made, guarantees the structural strength, and simultaneously can pass through the front plate, the side plate on the perforation of connecting piece and arrange a part of prestressed reinforcement, can reduce the process of bundling reinforcement, the utility model discloses production efficiency is good, and the structural strength is high.

Description

Technical Field

[0001] This utility model relates to the field of composite slabs, and more particularly to a UHPC ribbed prestressed composite slab. Background Technology

[0002] In recent years, precast concrete truss slabs have been widely used in the construction industry. This product can reduce the number of work steps and the amount of formwork and scaffolding used in the construction process, thereby reducing labor consumption, lowering construction difficulty, and improving construction efficiency. Existing precast concrete truss slabs are made by prefabricating a truss composed of top chord bars, web bars, and bottom chord bars. When the concrete base slab is poured, the bottom chord bars and some of the web bars are embedded in the concrete base slab to form the precast concrete truss slab.

[0003] This type of precast concrete truss slab, which combines truss reinforcement with a precast base slab, offers limited improvement in slab stiffness. Cracking is frequent during production, transportation, and construction, and it cannot be applied to large-span structures. During production, the truss reinforcement and the reinforcing mesh within the precast base slab are pre-tied before pouring. Because the bottom of the web reinforcement is not fixed and is raised for support, the binding of the reinforcing mesh is complex and prone to displacement during production, making it difficult to guarantee the quality of the finished product.

[0004] To address these issues, application number CN202320456816.X proposes a UHPC ribbed prestressed composite slab. However, this composite slab has only one top chord, resulting in insufficient strength of the cast ribs. Furthermore, its support blocks are snap-fit, which necessitates the use of elastic materials such as plastic or thin metal, which also affects its structural strength. In addition, this patent still requires a large number of reinforcing bars to be tied during actual processing. Summary of the Invention

[0005] To ensure the strength of the composite slab while providing support at the bottom of the truss and reducing the need for reinforcing bar binding during fabrication, this invention proposes a UHPC ribbed prestressed composite slab. Its structure includes: a truss composed of top chords, web reinforcement, connectors, and prestressing tendons; and a precast base slab in which the lower part of the web reinforcement, connectors, and prestressing tendons are embedded. The top chords consist of two parallel bars, with several short bars between them fixing the two top chords. The top chords are formed into ribs by UHPC casting. The web reinforcement... The upper chord reinforcement is symmetrically arranged on both sides, and the web reinforcement is wavy, with its crests fixed to the upper chord reinforcement and its troughs having through holes running vertically through the top and bottom. The connecting member includes a main body with a groove on the waist of the main body, into which the troughs of the web reinforcement are inserted. The main body has a threaded hole running vertically through the top and bottom, and a screw is screwed into the threaded hole and passes through the through hole to protrude from the upper surface of the main body. The upper part of the main body also has a front plate and a side plate, with through holes on the front plate and the side plate respectively. The prestressing tendon includes several longitudinal and transverse reinforcements, which pass through the through holes on the front plate and the side plate respectively.

[0006] Preferably, the bottom of the screw is provided with several protruding legs, and the connecting member is made entirely of metal.

[0007] Preferably, a limiting rod is provided in the middle of the screw, and the distance from the limiting rod of all connecting parts to the bracket is equal.

[0008] Preferably, the front plate and the side plate are at different heights, and the axis of the perforation on the front plate and the axis of the perforation on the side plate are not in the same plane.

[0009] Preferably, the short ribs are arranged in parallel or intersecting directions.

[0010] This invention designs two upper chord bars, which are fixed by short bars, increasing the maximum width of the ribs formed by casting. It also designs a prefabricated connector that can simultaneously support the truss and arrange the steel mesh. The connector is made entirely of metal, ensuring structural strength. At the same time, some prestressed tendons can be arranged through the perforations on the front and side plates of the connector, which can reduce the process of tying steel bars. This invention has good production efficiency and high structural strength. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a perspective view of the present invention, which only includes the metal structure.

[0013] Figure 2 for Figure 1 The front view.

[0014] Figure 3 for Figure 1 Side view.

[0015] Figure 4 This is a schematic diagram of the connecting component.

[0016] Figure 5 This is a perspective view of the present utility model.

[0017] In the diagram: 1. Top chord; 2. Short rib; 3. Web rib; 4. Longitudinal rib; 5. Transverse rib; 6. Connecting component; 61. Main body; 62. Slot; 63. Screw; 64. Leg; 65. Limiting rod; 66. Front plate; 67. Side plate; 68. Perforation. Detailed Implementation

[0018] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0019] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0022] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0023] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. Example 1

[0024] like Figures 1-5 As shown, the UHPC ribbed prestressed composite slab of this utility model comprises: a truss consisting of upper chord 1, web 3, connectors 6, and prestressing tendons, and a precast base slab in which the lower part of the web 3, connectors 6, and prestressing tendons are embedded; there are two upper chord 1 arranged in parallel, and several short ribs 2 are provided between the two upper chord 1 to fix them; the upper chord 1 is formed into ribs by UHPC casting; the web 3 is symmetrically arranged on both sides of the upper chord 1, and the web 3 is wavy, with its crests fixed to the upper chord 1 and its troughs fixed to the upper chord 1. The connector 6 includes a main body 61, a groove 62 on the waist of the main body 61, the trough of the web reinforcement 3 is inserted into the groove 62, the main body 61 has a threaded hole that runs through the top and bottom, the screw 63 is screwed into the threaded hole and passes through the through hole and extends out onto the upper surface of the main body 61, the upper part of the main body 61 is also provided with a front plate 66 and a side plate 67, and the front plate 66 and the side plate 67 are respectively provided with through holes 68; the prestressing tendon includes a number of longitudinal tendons 4 and transverse tendons 5, the longitudinal tendons 4 and the transverse tendons 5 pass through the through holes 68 on the front plate 66 and the side plate 67 respectively.

[0025] More specifically, the bottom of the screw 63 is provided with several protruding legs 64, and the connecting member 6 is made of metal material to ensure the strength of the overall frame.

[0026] More specifically, a limiting rod 65 is provided in the middle of the screw 63, and the distance from the limiting rod 65 of all connecting parts 6 to the bracket 64 is equal, so as to ensure that when the screw 63 is screwed in to abut the bottom of the main body 61, the bottom of the web rod is in the same plane and will not tilt.

[0027] More specifically, the front plate 66 and the side plate 67 are at different heights, and the axis of the perforation 68 on the front plate 66 and the axis of the perforation 68 on the side plate 67 are not in the same plane, thus allowing the transverse rib 5 and the longitudinal rib 4 to make way.

[0028] More specifically, the short ribs 2 are arranged in parallel.

[0029] This invention designs two upper chord bars, which are fixed by short bars, increasing the maximum width of the ribs formed by casting. It also designs a prefabricated connector that can simultaneously support the truss and arrange the steel mesh. The connector is made entirely of metal, ensuring structural strength. At the same time, some prestressed tendons can be arranged through the perforations on the front and side plates of the connector, which can reduce the process of tying steel bars. This invention has good production efficiency and high structural strength.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A UHPC ribbed prestressed composite slab, characterized in that: include: A truss consisting of top chords, web reinforcements, connectors, and prestressing tendons, and a precast base slab in which the lower part of the web reinforcements, connectors, and prestressing tendons are embedded; the top chords consist of two parallel top chords, with several short bars between them to fix the two top chords, and the top chords are cast into ribs by UHPC; the web reinforcements are symmetrically arranged on both sides of the top chords, and the web reinforcements are wavy, with the crests fixed to the top chords and the troughs having through holes running vertically; the connectors include a main body, with a groove on the waist of the main body into which the troughs of the web reinforcements are engaged, and a threaded hole running vertically through the main body, into which a screw is screwed and through the through hole to protrude from the upper surface of the main body; the upper part of the main body also has a front plate and a side plate, with through holes on the front plate and side plate respectively; the prestressing tendons include several longitudinal and transverse reinforcements, which pass through the through holes on the front plate and side plate respectively.

2. The UHPC ribbed prestressed composite slab according to claim 1, characterized in that: The bottom of the screw is provided with several protruding legs, and the connecting part is made entirely of metal.

3. The UHPC ribbed prestressed composite slab according to claim 2, characterized in that: The screw is provided with a limiting rod in the middle, and the distance from the limiting rod of all connecting parts to the leg is equal.

4. The UHPC ribbed prestressed composite slab according to claim 3, characterized in that: The front plate and side plate are at different heights, and the axis of the perforation on the front plate and the axis of the perforation on the side plate are not in the same plane.

5. The UHPC ribbed prestressed composite slab according to claim 4, characterized in that: The short ribs are arranged in parallel or intersecting directions.

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