阅读说明：本技术 一种柔性材料等代出筋的叠合板预制底板及其制作方法 (Laminated slab prefabricated bottom plate made of flexible materials and other materials and replacing ribs and manufacturing method of laminated slab prefabricated bottom plate ) 是由 李鹏 李贤� 欧健 汤国芳 李健 李微 申逸峰 孙金标 高麒 李站立 王取 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种柔性材料等代出筋的叠合板预制底板及其制作方法,本预制底板包括内部埋设有钢筋网架的混凝土板,钢筋网架由若干横向钢筋和纵向钢筋交错布置而成,横向钢筋和纵向钢筋的两端均不超出混凝土板的侧边,混凝土板至少有一边伸出若干柔性材料出筋条,柔性材料出筋条的其中一端埋入混凝土板内并且与同侧的横向钢筋或纵向钢筋一一对应,柔性材料出筋条埋入混凝土板部分的长度和其伸出混凝土板侧边的长度均不小于其锚固长度,其能够在不降低叠合板的整体性的基础上,解决了传统预制底板出筋问题。(The invention discloses a laminated slab prefabricated bottom plate with ribs replaced by flexible materials and the like and a manufacturing method thereof.)

1. The utility model provides a prefabricated bottom plate of superimposed sheet of rib is taken place out such as flexible material, concrete slab (4) including inside buried the reinforcing bar rack underground, the reinforcing bar rack is formed by a plurality of horizontal reinforcing bar (1) and vertical reinforcing bar (2) staggered arrangement, the both ends of horizontal reinforcing bar (1) and vertical reinforcing bar (2) do not all exceed concrete slab (4)'s side, a serial communication port, concrete slab (4) have at least one side to stretch out a plurality of flexible material and go out rib (3), flexible material goes out in one of them one end of rib (3) and with horizontal reinforcing bar (1) or vertical reinforcing bar (2) one-to-one of homonymy, flexible material goes out the length that rib (3) buried concrete slab (4) part and its length that stretches out concrete slab (4) side all is not less than its anchor length.

2. The prefabricated floor slab of a laminated slab, which is made of flexible materials and replaces ribs, as claimed in claim 1, wherein the ribs (3) made of flexible materials are selected from one or more of steel wire ropes, non-substrate impregnated carbon fiber bars, non-substrate impregnated glass fiber bars, non-substrate impregnated aramid bars and non-substrate impregnated basalt bars.

3. A prefabricated slab floor using flexible material or the like instead of reinforcement according to claim 1, wherein the height of said flexible material reinforcement (3) in the thickness direction of the concrete slab (4) is not higher than the height of said reinforcement grid.

4. A prefabricated slab floor of a flexible material or the like for a rib as claimed in claim 1, wherein said concrete slab (4) has a slab thickness of not less than 35 mm and a concrete strength grade of not less than C30.

5. A prefabricated floor slab of a flexible material or the like for a laminated slab as claimed in claim 1, wherein said concrete slab (4) is provided with flexible material ribs (3) having a side roughness of not less than 1 mm.

6. A prefabricated floor for superimposed slab of flexible material or the like with ribs as claimed in claim 1, wherein said concrete slab (4) is internally provided with steel trusses.

7. A prefabricated floor for superimposed slab of flexible material or the like, substituted for ribs, according to claim 1, characterized in that said transversal reinforcement (1) and vertical reinforcement (2) are arranged perpendicular to each other.

8. A method for manufacturing a prefabricated floor for a laminated slab made of a flexible material or the like according to claim 1, wherein the method comprises the following steps:

s1, manufacturing a bottom die of the concrete slab (4) and placing transverse steel bars (1) and longitudinal steel bars (2) on the bottom die;

s2, mounting a side template (5) at the edge of the bottom die to ensure that two ends of the transverse steel bar (1) and the longitudinal steel bar (2) do not extend out of the side template (5);

s3, the bottom die upper table positioning plate (6) is used for fixing the flexible material outlet ribs (3), one ends of the flexible material outlet ribs (3) extend into the side die plates (5), and the other ends of the flexible material outlet ribs extend out of the side die plates (5) from the upper sides of the side die plates (5);

s4, pouring concrete in a space surrounded by the bottom die and the side die plate (5), and performing roughening treatment on the surface of the concrete;

s5, curing the concrete, and removing the mold to lay the flexible material ribs (3) flat.

9. The method for manufacturing a prefabricated bottom plate of a laminated slab made of flexible materials and other ribs as claimed in claim 8, wherein the sectional area of the ribs (3), the length of the ribs extending into the side formworks (5) and the length of the ribs extending out of the side formworks (5) of the flexible materials meet the requirement of the designed anti-pulling bearing capacity.

Technical Field

The invention relates to the field of laminated slab bottom plates in constructional engineering, in particular to a laminated slab prefabricated bottom plate made of flexible materials and the like and used for replacing ribs and a manufacturing method thereof.

Background

In order to enhance the integrity of the reinforced concrete composite slab, the prefabricated bottom plate of the existing composite slab adopts a reinforcement-extending connection mode of a reinforced concrete prefabricated bottom plate. However, the reinforced concrete prefabricated floor has the following problems: 1) the production is complex and the manufacturing cost is high; the reinforced concrete prefabricated base plate with the ribs needs to be grooved on the surrounding templates in the production process of a factory so as to facilitate the ribs to be formed, and the rib forming positions of the prefabricated base plates in different projects are different, so that the universality of the templates is poor, and the template waste is serious; 2) the steel bar outlet of the reinforced concrete prefabricated bottom plate influences the transportation of the reinforced concrete prefabricated bottom plate; 3) the steel bar of the prefabricated bottom plate of reinforced concrete is easy to be erected when the prefabricated bottom plate is installed, and the field installation efficiency is influenced. Therefore, a need exists for a solution to the problem of ribbing in conventional prefabricated floor panels without compromising the integrity of the composite panel.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a laminated slab prefabricated bottom plate made of flexible materials and the like and used for replacing ribs and a manufacturing method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a laminated slab prefabricated bottom plate with ribs replaced by flexible materials and the like, which comprises a concrete slab with a reinforcing steel bar net rack embedded inside, wherein the reinforcing steel bar net rack is formed by staggered arrangement of a plurality of transverse reinforcing steel bars and longitudinal reinforcing steel bars, both ends of the transverse reinforcing steel bars and the longitudinal reinforcing steel bars do not exceed the side edges of the concrete slab, at least one side of the concrete slab extends out of a plurality of flexible material rib discharging strips, one ends of the flexible material rib discharging strips are embedded into the concrete slab and correspond to the transverse reinforcing steel bars or the longitudinal reinforcing steel bars on the same side one by one, and the length of the part of the flexible material rib discharging strips embedded into the concrete slab and the length of the part of the flexible material rib discharging strips extending out of the side edges of the concrete slab are not less than the anchoring length of the flexible material rib discharging strips.

Preferably, the flexible material rib is one or more of a steel wire rope, a non-substrate impregnated carbon fiber strip, a non-substrate impregnated glass fiber strip, a non-substrate impregnated aramid fiber strip and a non-substrate impregnated basalt strip.

Preferably, the height of the flexible material reinforcing bars in the thickness direction of the concrete slab is not higher than that of the reinforcing steel bar net rack;

preferably, the plate thickness of the concrete plate is not less than 35 mm, and the concrete strength grade is not lower than C30.

Preferably, the concrete slab is provided with flexible material ribs with the side roughness not less than 1 mm.

Preferably, the concrete slab is internally provided with a steel bar truss.

Preferably, the transverse reinforcing bars and the vertical reinforcing bars are arranged perpendicular to each other.

The invention also provides a manufacturing method of the laminated slab prefabricated bottom plate made of flexible materials and the like instead of ribs, which specifically comprises the following steps:

s1, manufacturing a bottom die of the concrete slab, and placing transverse steel bars and longitudinal steel bars on the bottom die;

s2, mounting side formworks at the edge of the bottom die to ensure that two ends of the transverse steel bars and the longitudinal steel bars do not extend out of the side formworks;

s3, the bottom die upper table positioning plate is used for fixing flexible material outlet ribs, one ends of the flexible material outlet ribs extend into the side die plates, and the other ends of the flexible material outlet ribs extend out of the side die plates from the upper sides of the side die plates;

s4, pouring concrete in a space enclosed by the bottom die and the side die plate, and performing roughening treatment on the surface of the concrete;

and S5, curing the concrete, and removing the mold to lay the ribs of the flexible material flat.

Preferably, the cross-sectional area of the ribs, the length of the ribs extending into the sideforms and the length of the ribs extending out of the sideforms meet the designed uplift bearing capacity requirement.

The invention has the beneficial effects that:

1) the rib strips are made of the flexible materials with low bending rigidity, ribs can be formed from the upper side of the side template when the bottom plate is poured, the side template can be conveniently leveled after being disassembled, the problem that the side template needs to be grooved to enable the ribs in the template to form ribs in the traditional reinforced concrete composite slab prefabricated bottom plate production process is solved, the universality of the side template is improved, the cost of the side template is greatly reduced, the production efficiency of the prefabricated bottom plate is improved, and the economic benefit is remarkable.

2) When the concrete slab is manufactured, the flexible material is formed into ribs, the ribs are demoulded and then are leveled, so that the pulling force between the post-pouring slab joints can be effectively transmitted to the steel bars in the slab, and the reinforced concrete composite slab adopting the prefabricated bottom plate has the integrity equivalent to that of the traditional composite slab.

3) The rib can be conveniently bent by adopting a flexible material, so that the difficult problem of steel bar interference during construction is avoided, and the on-site assembly efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of transverse reinforcing bars, longitudinal reinforcing bars and flexible material outlet ribs in a bottom plate of a composite slab in example 1;

FIG. 2 is a graph showing the position distribution of transverse reinforcing bars, longitudinal reinforcing bars and flexible material outlet bars in example 1;

FIG. 3 is a schematic view of a concrete slab structure in example 1;

FIG. 4 is a schematic structural view of transverse reinforcing bars, longitudinal reinforcing bars and flexible material outlet ribs in a bottom plate of a composite slab in embodiment 2;

fig. 5 is a distribution diagram of the positions of transverse reinforcing bars, longitudinal reinforcing bars and flexible material outlet bars in example 2.

FIG. 6 is a schematic view of a concrete slab structure in example 2;

FIG. 7 is a schematic structural view of transverse reinforcing bars, longitudinal reinforcing bars, truss reinforcing bars, and flexible material outlet ribs in a bottom plate of a composite slab in example 3;

FIG. 8 is a graph showing the position distribution of transverse reinforcement, longitudinal reinforcement, truss reinforcement, and flexible material outlet ribs in example 3;

FIG. 9 is a schematic view of a concrete slab structure in example 3;

fig. 10 is a schematic structural view of the bottom mold and the alignment plate in embodiment 1.

1. Transverse reinforcing steel bars; 2. longitudinal reinforcing steel bars; 3. rib forming of the flexible material; 4. a concrete slab; 5. a sideform; 6. positioning a plate; 7. and (5) truss reinforcing steel bars.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1, as shown in fig. 1 to 3, a prefabricated slab of a composite slab using flexible material or the like instead of ribs includes a concrete slab 4 having transverse ribs 1, longitudinal ribs 2, and flexible material ribs 3, wherein the flexible material ribs 3 are made of steel cables having a small bending rigidity, the thickness of the concrete slab 4 is 60 mm, and the concrete strength rating is C35. Both ends of the transverse steel bar 1 and the longitudinal steel bar 2 do not exceed the side surface of the concrete slab 4;

the steel wire ropes extend out of two opposite side surfaces of the concrete slab 4, and the length of the steel wire ropes embedded into the concrete slab 4, the length of the steel wire ropes extending out of the side surfaces of the concrete slab 4 and the sectional area of the steel wire ropes are ensured to meet the requirement that the pulling resistance bearing capacity of the bottom plate concrete and the concrete for installing the cast-in-place slab joint is not lower than the sum of the tensile strength of the transverse steel bars or the longitudinal steel bars in the same direction within the same side width range;

the height of the steel wire ropes in the thickness direction of the concrete plate 4 is equal to the height of the transverse steel bars or the longitudinal steel bars in the extending direction, the distance between the steel wire ropes is not larger than the distance between the adjacent transverse steel bars or the longitudinal steel bars, and the roughness of the concrete plate 4 on the extending side face of the steel wire ropes is not smaller than 1 mm.

Referring to fig. 10, this embodiment further provides a method for manufacturing a laminated slab prefabricated bottom plate made of flexible materials and other materials instead of ribs, which includes the following specific steps:

1) manufacturing a bottom die of a concrete slab 4, positioning a transverse steel bar 1 and a longitudinal steel bar 2 on the bottom die, and installing a side template 5, wherein two ends of the transverse steel bar 1 and two ends of the longitudinal steel bar 2 do not extend out of the side template 5;

2) a positioning plate 6 is adopted to fix a steel wire rope, one end of the steel wire rope extends into the side template 5, the other end of the steel wire rope extends out of the side template 5 from the upper part of the side template 5, and the sectional area, the length extending into the side template 5 and the length extending out of the side template 5 of the steel wire rope meet the requirement of the design of the anti-pulling bearing capacity;

3) and (3) pouring concrete in a space enclosed by the bottom die and the side die plates 5, roughening the surface of the concrete, curing the concrete, removing the die and flattening the steel wire rope.

This patent adopts the little flexible material of bending stiffness to go out the rib, can go out the muscle from the side form board top when pouring the bottom plate, and can conveniently flatten after demolising the side form board, and it has avoided in the prefabricated bottom plate production process of traditional reinforced concrete superimposed sheet the side form board need slot and supply the difficult problem that the inboard reinforcing bar goes out the muscle, has improved the commonality of side form board, greatly reduced the side form board cost, improved the production efficiency of prefabricated bottom plate, its economic benefits is showing.

When the concrete slab is manufactured, the flexible material is formed into ribs, the ribs are demoulded and then are leveled, so that the pulling force between the post-pouring slab joints can be effectively transmitted to the steel bars in the slab, and the reinforced concrete composite slab adopting the prefabricated bottom plate has the integrity equivalent to that of the traditional composite slab.

Example 2, see fig. 4-6, the flexible material reinforcing bars 3 are carbon fiber impregnated strips without a base material, the thickness of the concrete slab 4 is 60 mm, and the concrete strength grade is C40, which is otherwise the same as example 1.

Example 3 referring to fig. 7 to 9, a steel bar truss is further provided in a concrete slab 4, the thickness of the concrete slab 4 is 70 mm, and the strength grade of the concrete is C40, which is otherwise the same as in example 2.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.