CN214941494U

CN214941494U - Recycled concrete laminated slab containing prestressed FRP tendon fiber

Info

Publication number: CN214941494U
Application number: CN202120653554.7U
Authority: CN
Inventors: 方圣恩; 晏文承
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-30
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to a contain prestressing force FRP muscle bundle fibre recycled concrete superimposed sheet, plate body under the concrete, this concrete lower plate body inner tower is equipped with violently indulges crisscross framework of steel reinforcement, and framework of steel reinforcement upper end equipartition has a plurality of protruding muscle that are the type of falling V, protruding muscle V mouth links firmly on framework of steel reinforcement down and in the tip, under protruding muscle top protrusion concrete plate body and with pour under the concrete on the concrete plate body of plate body upper end plate body combination, under the concrete in-plate pre-buried have a plurality of pre-buried pipes along horizontal direction parallel arrangement, pre-buried tube hole interpolation is equipped with the FRP muscle bundle, and this concrete superimposed sheet has strengthened the connection between upper and lower concrete plate body, guarantees the harmonious deformation of junction concrete, prevents the not enough adverse effect that brings of wholeness of precast concrete superimposed sheet.

Description

Recycled concrete laminated slab containing prestressed FRP tendon fiber

Technical Field

The utility model relates to a contain prestressing force FRP muscle bundle fibre recycled concrete superimposed sheet.

Background

Concrete slabs are important force transfer members in concrete structures, mainly acting against bending. Due to the factors of service life limit, construction quality, material aging and the like, the bending resistance bearing capacity and rigidity of the concrete slab may be insufficient, and the structural safety is threatened. Meanwhile, special structures or parts (such as floors for placing large-scale instruments or other large heavy objects) have high requirements on the bearing capacity of the reinforced concrete slabs, so certain reinforcing and strengthening measures must be taken for the poured concrete slabs so that the concrete slabs can meet the requirement on the bending resistance bearing capacity.

The concrete slabs adopted in civil engineering at present comprise cast-in-place slabs and precast slabs, the cast-in-place slabs have good integrity, but a large number of building templates are needed, the cost is high, and the construction period is long. And the prefabricated floor slab reduces the use of templates and steel, and has short construction period. Meanwhile, the concrete slab is easy to crack, which not only affects the beauty but also may cause water leakage. In addition, with the advocation of the concept of "green construction", the secondary use of waste concrete materials has also received much attention. Therefore, the precast concrete panel comprising the combination of "high bending stiffness", "high bending bearing capacity", "crack resistance", "green", etc. meets the future demand for high performance concrete panels.

The existing prefabricated laminated slab has the defects of poor cracking resistance, insufficient bending resistance bearing capacity and rigidity, incapability of meeting the bearing capacity requirement of special parts of the structure and the like sometimes; meanwhile, the prefabricated composite slab has a certain dead weight, so that micro cracks may exist at the bottom of the slab before use, and cracks may occur in the transportation and lifting processes, so that the prefabricated composite slab is not attractive and the service life is influenced. In addition, because the problem of processing technology, the anchor between the upper and lower mainboard is not enough for the wholeness of superimposed sheet is not enough, is unfavorable for building structure's whole anti-seismic performance.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of prior art, the utility model aims to solve the technical problem that a contain prestressing force FRP muscle bundle fibre recycled concrete superimposed sheet is provided, not only simple structure is reasonable, has good engineering using value moreover.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a contain prestressing force FRP muscle bundle fibre recycled concrete superimposed sheet, plate body under the concrete, this concrete lower plate body inner tower is equipped with violently indulges crisscross framework of steel reinforcement, and the framework of steel reinforcement upper end equipartition has a plurality of protruding muscle that are the type of falling V, protruding muscle V mouth links firmly on framework of steel reinforcement in the tip down, protruding muscle top protrusion concrete lower plate body and with pour under the concrete on the concrete plate body of plate body upper end combine, under the concrete pre-buried in the plate body have a plurality of pre-buried pipes along horizontal direction parallel arrangement, pre-buried tube hole interpolation is equipped with the FRP muscle bundle.

Furthermore, the steel reinforcement framework comprises transverse steel bars extending transversely and vertical steel bars extending longitudinally below the transverse steel bars, and the convex steel bars are arranged on the surface of the steel reinforcement framework at intervals along the length direction of the transverse steel bars.

Furthermore, the concrete lower plate body and the concrete upper plate body are made of recycled fiber concrete.

Compared with the prior art, the utility model discloses following beneficial effect has: the bending resistance bearing capacity and the rigidity of the precast concrete laminated slab can be greatly improved, the problem that a large amount of waste concrete is difficult to treat is solved, the resource recycling is realized, and the concept of sustainable development is met. In addition, fibers in the lower plate body can effectively inhibit the prefabricated plates from cracking caused by self weight, transportation and lifting. The up end of lower plate body vertically is provided with the protruding muscle of the type of falling V of a plurality of rows, and the effect of the protruding muscle of the type of falling V is the anchor, strengthens the connection between upper and lower concrete plate body, guarantees the coordinated deformation of junction concrete, prevents the not enough adverse effect that brings of wholeness of precast concrete superimposed sheet.

The utility model is suitable for a building structure's special parts (if place large-scale instrument or other great heavy object floor department). In addition, because the lower main board is added with the fibers, the composite board can be widely used for basements and board members with higher requirements on crack resistance and permeability resistance, can be subjected to large-scale prefabrication production in factories, and has good engineering application value.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of a concrete lower plate body in an embodiment of the present invention.

In the figure: 1-concrete lower plate body, 2-steel bar skeleton, 3-convex rib, 4-concrete upper plate body, 5-embedded pipe, 6-FRP rib bundle, 7-transverse steel bar and 8-erection rib.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1-2, a recycled concrete laminated slab containing prestressed FRP tendon fibers comprises a concrete lower slab body 1, wherein a reinforcement framework 2 which is transversely and longitudinally staggered is erected in the concrete lower slab body, a plurality of inverted-V-shaped convex ribs 3 are uniformly distributed at the upper end of the reinforcement framework, a V-shaped opening of each convex rib is downwards fixedly connected to the reinforcement framework at the end part, the top end of each convex rib protrudes out of the concrete lower slab body and is combined with a concrete upper slab body 4 which is poured at the upper end of the concrete lower slab body, a plurality of embedded pipes 5 which are arranged in parallel along the horizontal direction are embedded in the concrete lower slab body, and an FRP tendon 6 is inserted into each embedded pipe hole.

The embodiment of the utility model provides an in, the framework of steel reinforcement includes horizontal reinforcing bar 7 of horizontal extension and is located the set up muscle 8 of horizontal reinforcing bar below longitudinal extension, protruding muscle all sets up on its surface along horizontal reinforcing bar length direction interval.

In the embodiment of the utility model provides an in, the plate body all chooses recycled fiber concrete for use with the concrete upper plate body under the concrete.

The utility model discloses pour forming method: firstly, binding a steel bar framework, and binding a transverse steel bar and a vertical bar with the diameter of 6mm according to the set space requirement. Fixing the transverse steel bars and the vertical steel bars by using small binding wires in the binding process; later with protruding muscle wind-up connection on horizontal reinforcing bar, then will tie up and protruding muscle framework up place on the template that props up in advance to fill up the framework of steel reinforcement with the cushion, install the embedded pipe afterwards, carry out the pouring of concrete lower plate body after that, slowly pour the board body under the concrete with the good regeneration fiber concrete of stirring, when regeneration fiber concrete covers the framework of steel reinforcement completely and exposes the protruding muscle of type of falling V, stop pouring promptly, and vibrate evenly. Then rolling and leveling the surface of the poured concrete lower plate body by using a roller; and pouring the upper concrete plate body on the basis of the poured lower concrete plate body, pouring recycled concrete, vibrating and tamping, smoothing the surface, improving the compactness of the concrete and enhancing the occlusion effect between the fibers and the aggregates.

And (4) removing the mold after the maintenance of the laminated slab is finished, and finally applying prestress, wherein the prestress of the FRP rib bundle is applied by a post-tensioning method. Firstly, the pre-buried pipe is drawn out, then FRP tendon is inserted into the reserved hole and is tensioned, and the process comprises the steps of pipe drawing → maintenance of the prestressed tendon → tensioning → anchoring and anchor head treatment. And after the tensioning prestress is finished, filling epoxy resin glue in the hole. Finally, the prestressed FRP tendon, the transverse steel bar, the inverted V-shaped convex rib and the lower plate body of the fiber recycled concrete are tightly combined to form a steel bar mesh and an anchoring system.

The present invention is not limited to the above preferred embodiments, and any person can obtain the recycled concrete composite slab containing prestressed FRP tendon fiber in various forms. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a contain prestressing force FRP muscle bundle fibre recycled concrete superimposed sheet which characterized in that: including the concrete lower plate body, this concrete lower plate body inner frame is equipped with violently indulges crisscross framework of steel reinforcement, and the framework of steel reinforcement upper end equipartition has a plurality of protruding muscle that are the V type, protruding muscle V mouth links firmly on framework of steel reinforcement downwards and in the tip, protruding muscle top protrusion concrete lower plate body and with pour concrete upper plate body combination of plate body upper end under the concrete, pre-buried a plurality of pre-buried pipes along horizontal direction parallel arrangement in the concrete lower plate body, the interpolation of pre-buried tube hole is equipped with the FRP muscle bundle.

2. The recycled concrete composite slab containing prestressed FRP tendon fibers as claimed in claim 1, wherein: the steel bar framework comprises transverse steel bars extending transversely and erection bars located below the transverse steel bars and extending longitudinally, and the convex bars are arranged on the surface of the steel bar framework at intervals along the length direction of the transverse steel bars.

3. The recycled concrete composite slab containing prestressed FRP tendon fibers as claimed in claim 1, wherein: the concrete lower plate body and the concrete upper plate body are made of recycled fiber concrete.