阅读说明：本技术 带可移除肋的预制底板及叠合板的生产方法 (Prefabricated base plate with removable ribs and production method of laminated slab ) 是由 陈甫亮 阙爱星 施明哲 于 2021-10-29 设计创作，主要内容包括：本发明为一种带可移除肋的预制底板及叠合板的生产方法,预制底板包括混凝土板以及固定在混凝土板上的至少两个可移除肋,可移除肋包括内部灌注有高强砂浆的方钢管、预埋件和固定件,方钢管设置在混凝土板的表面,预埋件锚固在混凝土板中,固定件穿过方钢管并与预埋件连接；混凝土板中预埋有钢筋网片。叠合板包括上述预制底板及现浇层,叠合板的生产方法包括：S1设置边模；S2放置钢筋网片和可移除肋；S3浇筑混凝土；S4运输并定位预制底板；S5拆除。本发明的预制底板设置有可移除肋,能够有效保证混凝土板在脱模、起吊、运输阶段不会因为刚度不够而开裂变形,后期可拆卸并重复利用。叠合板的生产方法步骤简单,施工效率高。(The invention relates to a production method of a prefabricated bottom plate with removable ribs and a composite slab, wherein the prefabricated bottom plate comprises a concrete slab and at least two removable ribs fixed on the concrete slab, each removable rib comprises a square steel pipe, an embedded part and a fixing part, wherein high-strength mortar is poured into the square steel pipe, the embedded part is anchored in the concrete slab, and the fixing part penetrates through the square steel pipe and is connected with the embedded part; the concrete slab is embedded with a steel bar net. The laminated slab comprises the prefabricated bottom plate and the cast-in-place layer, and the production method of the laminated slab comprises the following steps: s1, setting a side die; s2 placing a reinforcing mesh and a removable rib; s3 pouring concrete; s4, transporting and positioning the prefabricated bottom plate; s5, removing. The precast bottom plate is provided with the removable ribs, so that the concrete slab can be effectively prevented from cracking and deforming due to insufficient rigidity in the demolding, hoisting and transporting stages, and can be detached and recycled in the later stage. The production method of the laminated slab has simple steps and high construction efficiency.)

1. The prefabricated bottom plate with the removable ribs is characterized by comprising a concrete slab and at least two removable ribs fixed on the concrete slab, wherein the removable ribs comprise square steel tubes with high-strength mortar poured inside, embedded parts and fixing parts, the square steel tubes are arranged on the surface of the concrete slab, the embedded parts are anchored in the concrete slab, and the fixing parts penetrate through the square steel tubes and are connected with the embedded parts; and a steel bar mesh is embedded in the concrete slab.

2. The prefabricated baseplate with the removable ribs as claimed in claim 1, wherein the embedded part is an embedded nut with internal threads, the fixing part is a screw rod with external threads, and the embedded part and the fixing part are in threaded connection.

3. The prefabricated floor panel with removable ribs of claim 2, wherein said embedment is further provided with reinforcing bars, said reinforcing bars being anchored in said concrete slab.

4. The prefabricated floor panel with removable ribs according to claim 3, wherein the surface of said concrete slab facing away from said square steel tube is provided as a rough surface.

5. The prefabricated floor panel with removable ribs of claim 4, wherein the spacing between two adjacent removable ribs is greater than 600 mm.

6. The prefabricated floor with removable ribs of claim 5, wherein said removable ribs disposed on the sides of said concrete slab are no more than 300mm from the sides of said concrete slab.

7. A method for producing a composite slab, comprising a prefabricated floor as claimed in any one of claims 1 to 6 and a cast-in-place layer, the concrete of which is cast on the surface of the concrete slab facing away from the square steel tubes, comprising the following steps:

s1, setting a side die: placing a side die on the bench die according to a design drawing, and placing bubble paper in an area enclosed by the side die;

s2 placing the rebar mesh and removable ribs: placing a steel bar mesh at a preset position on the bubble paper, and then placing a plurality of removable ribs at a specified position, wherein the thickness of the embedded part is equal to that of the concrete plate, and the embedded part is placed in a gap of the steel bar mesh;

s3 pouring concrete: pouring concrete among the plurality of removable ribs, anchoring the reinforcing mesh and the embedded part in the concrete after the concrete is cured to reach the strength required by the design, and placing the square steel tube on the surface of the concrete;

s4 transporting and positioning the prefabricated floor: hoisting and transporting the prefabricated bottom plate to a construction site, arranging a bottom support, hoisting the prefabricated bottom plate, placing the surface of the prefabricated bottom plate provided with the removable ribs on the bottom support, pouring cast-in-place layer concrete on the surface of the prefabricated bottom plate, which is far away from the square steel tube, and maintaining until the cast-in-place layer concrete reaches the strength;

s5, dismantling: and (4) unscrewing the fixing piece, taking down the square steel pipe and the fixing piece, and removing the bottom support.

8. The method for producing a laminated board according to claim 7, wherein the step S1 of producing a prefabricated floor further comprises: the step S2 further includes: and placing the hanging nail according to the design drawing, wherein the lifting point of the hanging nail faces to the side where the bubble paper is located.

9. A method for producing a laminated board according to claim 8, wherein in step S2: the spacing between two adjacent removable ribs is greater than 600mm and the distance between the removable ribs arranged on the side of the concrete slab and the side forms is not greater than 300 mm.

Technical Field

The invention belongs to the technical field of assembly type buildings, and particularly relates to a production method of a prefabricated bottom plate with removable ribs and a laminated slab.

Background

The composite floor slab is the most widely used prefabricated component in the fabricated building, and has the advantages of high production efficiency, environmental protection, short construction period and the like. However, the existing common truss steel bar composite floor slab has the problems of high steel bar content, large thickness of the floor slab, more field installation supports, difficult formwork support of post-cast strips of the bidirectional plates and the like, and the comprehensive cost of the floor slab is far higher than that of a cast-in-place floor slab due to the reasons.

The steel content of the composite floor slab is much larger than that of the traditional cast-in-place slab, and the reason is that the rigidity of the prefabricated bottom plate is small, the rigidity is increased by the truss steel bars, cracking during hoisting and transportation is prevented, in addition, the truss steel bars can interfere with the arrangement of the cast-in-place layer steel bars and the pre-burying of water and electricity, and the construction efficiency is greatly influenced, so that the production cost and the labor cost are increased. In view of this, chinese patent CN 209397803U proposes a UHPC ultra-high performance concrete detachable steel bar truss composite floor slab, which adopts fewer detachable and fixed steel bar trusses, and the longitudinal bars are flexibly arranged, thereby greatly saving the steel bar usage, adopting fewer temporary supports during construction, having fast construction speed, and shortening the construction period. There are a number of problems with this approach: still need truss reinforcing bar, can not dismantle, the UHPC ultrahigh performance concrete cost that adopts in addition is high, unfavorable popularization, and the production degree of difficulty is higher.

In summary, there is a need for a corresponding technique to solve the problem, and a method for producing a prefabricated slab and a laminated slab with reasonable overall rigidity, a thinner prefabricated slab and a lower steel consumption is developed to ensure the construction efficiency and quality of the laminated slab.

The invention content is as follows:

the invention aims to provide a prefabricated bottom plate with reasonable integral rigidity, small thickness of the prefabricated bottom plate and low steel consumption and a production method of a laminated slab, so as to ensure the key points of the construction efficiency and quality of the laminated floor slab.

In order to achieve the purpose, the invention adopts the following technical scheme:

a prefabricated bottom plate with removable ribs comprises a concrete slab and at least two removable ribs fixed on the concrete slab, wherein the removable ribs comprise square steel tubes with high-strength mortar poured inside, embedded parts and fixing parts, the square steel tubes are arranged on the surface of the concrete slab, the embedded parts are anchored in the concrete slab, and the fixing parts penetrate through the square steel tubes and are connected with the embedded parts; and a steel bar mesh is embedded in the concrete slab.

On the basis of the scheme, in another improved scheme, the embedded part is an embedded nut with internal threads, the fixed part is a screw rod with external threads, and the embedded part is in threaded connection with the fixed part.

On the basis of the scheme, in another improved scheme, the embedded part is further provided with a reinforcing rib, and the reinforcing rib is anchored in the concrete slab.

On the basis of the above scheme, in another improved scheme, the surface of the concrete slab, which faces away from the square steel pipe, is provided with a rough surface.

On the basis of the above scheme, in another improved scheme, the interval between two adjacent removable ribs is larger than 600 mm.

On the basis of the above solution, in another improved solution, the distance of the removable rib provided at the side of the concrete slab from the side of the concrete slab is not more than 300 mm.

The invention also provides a production method of the composite slab, the composite slab comprises the prefabricated bottom plate and the cast-in-place layer, and the concrete of the cast-in-place layer is cast on the surface of the concrete slab, which is far away from the square steel pipe, and the production method specifically comprises the following steps:

s1, setting a side die: placing a side die on the bench die according to a design drawing, and placing bubble paper in an area enclosed by the side die;

s2 placing the rebar mesh and removable ribs: placing a steel bar mesh at a preset position on the bubble paper, and then placing a plurality of removable ribs at a specified position, wherein the thickness of the embedded part is equal to that of the concrete plate, and the embedded part is placed in a gap of the steel bar mesh;

s3 pouring concrete: pouring concrete among the plurality of removable ribs, anchoring the reinforcing mesh and the embedded part in the concrete after the concrete is cured to reach the strength required by the design, and placing the square steel tube on the surface of the concrete;

s4 transporting and positioning the prefabricated floor: hoisting and transporting the prefabricated bottom plate to a construction site, arranging a bottom support, hoisting the prefabricated bottom plate, placing the surface of the prefabricated bottom plate provided with the removable ribs on the bottom support, pouring cast-in-place layer concrete on the surface of the prefabricated bottom plate, which is far away from the square steel tube, and maintaining until the cast-in-place layer concrete reaches the strength;

s5, dismantling: and (4) unscrewing the fixing piece, taking down the square steel pipe and the fixing piece, and removing the bottom support.

On the basis of the above solution, in another modified solution, the step S1 of producing the prefabricated base plate further includes: the step S2 further includes: and placing the hanging nail according to the design drawing, wherein the lifting point of the hanging nail faces to the side where the bubble paper is located.

On the basis of the above scheme, in another modified scheme, in the step S2: the spacing between two adjacent removable ribs is greater than 600mm and the distance between the removable ribs arranged on the side of the concrete slab and the side forms is not greater than 300 mm.

The invention has at least the following beneficial effects:

the prefabricated bottom plate with the removable ribs is provided with the removable ribs, so that the using amount of steel bars is small, the cost is low, the prefabricated bottom plate can be detached at the later stage and can be recycled, the cost is reduced, materials are saved, and the more the using times are, the lower the cost is; high-strength mortar is poured into the square steel pipe, so that better rigidity is guaranteed under the condition of small steel consumption, and the stress performance is high, so that the removable rib has good rigidity and integrity; the removable ribs are arranged on the concrete slab, so that the concrete slab can be effectively prevented from cracking and deforming due to insufficient rigidity in the demolding, hoisting and transporting stages; the removable ribs can play a role in the whole processes of production, transportation and construction, the removable ribs are disassembled after the construction of the laminated slab is completed, the removable ribs can replace transportation battens and supporting battens in transportation and field construction, materials are saved, and the cost is reduced.

According to the production method of the laminated slab, the removable ribs arranged at the bottom of the prefabricated bottom plate can well support the prefabricated bottom plate, the number of bottom supports and supporting battens which need to be arranged is reduced, the field manual operation amount is reduced, and the construction efficiency is improved; on the other hand, when pouring cast-in-place layer concrete, the removable rib can also prevent the prefabricated bottom plate from deforming, and after the cast-in-place layer of the composite slab is cured and formed, the removable rib can be recycled after being detached, so that the production cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a prefabricated base panel with removable ribs according to the present invention;

FIG. 2 is a schematic view of the connection of the removable ribs of the present invention;

FIG. 3 is a schematic view of a removable rib of the present invention;

FIG. 4 is a first schematic view of the production of a laminated board according to the present invention;

FIG. 5 is a second schematic view of the production of a laminated board according to the present invention;

FIG. 6 is a third schematic view showing the production of a laminated board according to the present invention;

FIG. 7 is a fourth schematic view showing the production of the laminate of the present invention.

FIG. 8 is a first schematic view of a prefabricated base plate of the present invention provided with vertical supports;

FIG. 9 is a second schematic view of the prefabricated base plate of the present invention with vertical supports;

reference numerals:

1-removable Ribs 2-concrete plates 3-fixing

4-screw rod 5-embedded nut 6-square steel pipe

7-hanging nail 8-reinforcing steel bar net piece 9-bottom support

10-side form 11-magnetic box

Detailed Description

The following preferred embodiments of the present invention are provided to aid in a further understanding of the invention. It should be understood by those skilled in the art that the description of the embodiments of the present invention is by way of example only, and not by way of limitation.

Referring to the schematic drawings of fig. 1 to 3, in one embodiment of the invention, the prefabricated baseplate with the removable ribs 1 comprises a concrete slab 2 and at least two removable ribs 1 fixed on the concrete slab 2, wherein each removable rib 1 comprises a square steel pipe 6 filled with high-strength mortar, an embedded part and a fixing part 3, the square steel pipe 6 is arranged on the surface of the concrete slab 2, the embedded part is anchored in the concrete slab 2, and the fixing part 3 penetrates through the square steel pipe 6 and is connected with the embedded part; the concrete slab 2 is embedded with a steel bar net piece 8. By arranging the removable ribs 1 on the concrete slab 2, the concrete slab 2 can be effectively prevented from cracking and deforming due to insufficient rigidity in the stages of demoulding, hoisting and transportation; the removable ribs 1 can play a role in the whole processes of production, transportation and construction, the removable ribs 1 are disassembled after the construction of the laminated slab is completed, the removable ribs 1 can replace transportation battens and support battens in transportation and field construction, materials are saved, and the cost is reduced.

Referring to the schematic diagrams of fig. 2 and fig. 3, on the basis of the above embodiment, in another modified embodiment, the embedded part is an embedded nut 5 with internal threads, the fixed part 3 is a screw rod 4 with external threads, and the embedded part and the fixed part 3 are in threaded connection.

In a further improved embodiment, in addition to the above-described embodiment, a reinforcement bar is also provided on the embedment, which reinforcement bar is anchored in the concrete slab 2, see the illustration of fig. 2. This improves the anchorage and resistance to pullout of the embedment in the concrete slab 2.

On the basis of the above-described embodiment, in another modified embodiment, the surface of the concrete slab 2 facing away from the square steel tube 6 is provided as a rough surface. This improves the bonding of the surface of the concrete slab 2 facing away from the square steel tube 6 to the cast-in-place concrete layer during the production of the composite slab.

On the basis of the above embodiment, in a further improved embodiment, the spacing between two adjacent removable ribs 1 is greater than 600 mm.

On the basis of the above described embodiment, in a further improved embodiment, the removable ribs 1 provided at the sides of the concrete slab 2 are at a distance of not more than 300mm from the sides of the concrete slab 2.

Referring to the illustrations of fig. 8 and 9, in the construction site, the surface of the prefabricated floor facing away from the square steel tube 6 is oriented, the surface provided with the removable ribs 1 rests on the bottom supports 9, the removable ribs 1 can replace the support battens, and the tops of the bottom supports 9 are directly clamped on the square steel tube 6. Due to the reinforcing and supporting effect of the removable ribs 1 on the prefabricated floor, the number of the bottom supports 9 can be reduced, and the construction efficiency is improved.

Referring to the schematic drawings of fig. 4 to 7, the method for producing a composite slab according to an embodiment of the present invention includes the steps of:

s1 sets the side mold 10: placing a side die 10 on a bench die according to a design drawing, and placing bubble paper in an area enclosed by the side die 10; in the embodiment, the side die 10 is fixed on the surface of the bench die by the magnetic connection of a plurality of magnetic boxes 11 and the bench die;

s2 placing the rebar mesh 8 and the removable ribs 1: placing a steel bar mesh 8 at a preset position on the bubble paper, then placing a plurality of removable ribs 1 at a specified position, wherein the thickness of an embedded part is equal to that of the concrete slab 2, and the embedded part is placed in a gap of the steel bar mesh 8;

s3 pouring concrete: concrete is poured among the plurality of removable ribs 1, after the concrete is cured to reach the strength required by the design, the reinforcing mesh 8 and the embedded part are both anchored in the concrete, and the square steel tube 6 is arranged on the surface of the concrete;

s4 transporting and positioning the prefabricated floor: hoisting and transporting the prefabricated bottom plate to a construction site, arranging a bottom support 9, hoisting the prefabricated bottom plate, placing the surface of the prefabricated bottom plate provided with the removable ribs 1 on the bottom support 9, pouring cast-in-place layer concrete on the surface of the prefabricated bottom plate, which is far away from the square steel tube 6, and maintaining until the cast-in-place layer concrete reaches the strength;

s5, dismantling: and (3) unscrewing the fixing piece 3, taking down the square steel tube 6 and the fixing piece 3, and removing the bottom support 9.

Referring to the schematic illustration of fig. 4, in another modified embodiment based on the above embodiment, the step S1 of producing the prefabricated base plate further includes: step S2 further includes: the hanging nail 7 is placed according to the design drawing, and the lifting point of the hanging nail 7 faces to the side where the bubble paper is located.

On the basis of the above embodiment, in another modified embodiment, in step S2: the interval between two adjacent removable ribs 1 is more than 600mm, and the distance between the removable ribs 1 arranged on the side of the concrete plate 2 and the side form 10 is not more than 300 mm.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting the protection scope thereof, and although the present application is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: numerous variations, modifications, and equivalents will occur to those skilled in the art upon reading the present application and are within the scope of the claims as issued or as granted.