CN215670416U - Prefabricated bottom plate of superimposed sheet and superimposed sheet concatenation structure - Google Patents

Abstract

The application provides a superimposed sheet prefabricated bottom plate and superimposed sheet concatenation structure relates to prefabricated plate production technical field. The prefabricated bottom plate comprises a bottom plate, prestressed tendons and a reinforcing steel mesh. The top of bottom plate is equipped with the recess along three side or four sides at every side interval, and when the three side at the top of bottom plate was equipped with the recess, remaining one side was equipped with the half-open groove that extends at the length direction of side, and prestressing tendons and reinforcing bar net piece are buried underground in the bottom plate and are not stretched out from the bottom plate. The splicing structure comprises a rear connecting steel bar, a superposed layer and a superposed slab prefabricated bottom plate. The prefabricated bottom plate of superimposed sheet does not have the rib of beard, and mould trompil and die filling form removal difficulty problem when directly avoiding bottom plate production avoid superimposed sheet site operation reinforcing bar collision problem simultaneously. The steel bar truss is removed, the rigidity of the prefabricated bottom plate of the laminated slab is improved through the matching of the prestressed ribs and the steel bar net pieces, and materials are saved. Through the post-arranged connecting steel bars in the grooves and the laminated layer concrete, the reliable connection between the plates is ensured.

Description

Prefabricated bottom plate of superimposed sheet and superimposed sheet concatenation structure

Technical Field

The application relates to the technical field of prefabricated plate manufacturing, in particular to a prefabricated bottom plate of a laminated slab and a splicing structure of the laminated slab.

Background

The existing precast concrete steel bar truss composite slab adopts truss ribs, the truss ribs are used for improving the rigidity of the slab, reducing the risks of demoulding and hoisting of concrete and construction cracking, but the proportion of the truss ribs is up to 40%, the steel consumption is large, and the difficulty of pipe penetrating of a field pipeline (the pipeline needs to penetrate through the steel bar truss) is increased. In addition, a special customized die (the side of the die is provided with a hole) is needed during manufacturing, the repeated utilization rate of the die is low, and the cost of the die is high; the existing laminated plate is inconvenient in actual transportation, increases the transportation difficulty and reduces the transportation amount; the construction difficulty is increased during construction.

Therefore, there is a need to design a new laminated slab for the existing problems to facilitate the production and manufacture and to facilitate the transportation and construction.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a prefabricated bottom plate of superimposed sheet, it can improve current superimposed sheet production and construction difficult problem.

Another object of the present application is to provide a composite slab splicing structure including the above composite slab prefabricated base plate, which has all the characteristics of the composite slab prefabricated base plate.

The embodiment of the application is realized as follows:

an embodiment of the application provides a prefabricated bottom plate of superimposed sheet, includes: the steel bar net comprises a bottom plate, prestressed tendons and a steel bar net piece;

the bottom plate is square, the top of bottom plate is equipped with the recess along three side or four sides at every side interval, works as the three side at the top of bottom plate is equipped with the recess, half open groove that another side border length direction extends, the prestressing tendons with the reinforcing bar net piece bury underground in the bottom plate and do not follow stretch out in the bottom plate.

Through using reinforcing bar net piece cooperation prestressing tendons, can ensure the rigidity of superimposed sheet prefabricated bottom plate under the condition that does not use the truss muscle, reduce with the steel volume, and when the pipeline need be buried underground, also need not follow and alternate between the steel truss, more conveniently lay. Because the prestressed tendons and the reinforcing steel bar net piece do not extend out of the bottom plate, a special die does not need to be customized when the die is designed, the repeated utilization rate of the die is improved, the cost of the die is reduced, and the production efficiency is improved. And moreover, no prestressed tendons and reinforcing mesh extend out, so that the interference of the beard tendons does not need to be considered, and the transportation and the use are facilitated.

In addition, the laminated slab prefabricated base plate provided by the embodiment of the application can also have the following additional technical characteristics:

in an optional embodiment of the present application, the reinforcing bars of the reinforcing bar net sheet and the grooves are arranged in a staggered manner, and the reinforcing bars of the reinforcing bar net sheet are not embedded in the bottom wall of the groove bottom of the grooves.

Because the recess utilizes the mould to form, through avoiding the reinforcing bar of reinforcing bar net piece, can prevent in process of production, the interference between mould and the reinforcing bar net piece.

In an alternative embodiment of the present application, the grooves of each side are spaced apart by a predetermined modulus.

The connecting ribs can be placed in the grooves distributed according to the preset modulus, and when the connecting ribs are connected with the laminated slab prefabricated bottom plate or the wall body and the beam, the connecting ribs or the reinforcing mesh pieces are added with post-cast concrete, so that the reliable connection of the connecting ribs or the reinforcing mesh pieces is realized.

In an alternative embodiment of the present application, the surfaces of the groove wall and the bottom wall of the semi-open groove are rough surfaces.

Due to the rough surface, more contact surfaces can be formed between the concrete and the rough surface during pouring, and the connection reliability is improved.

In alternative embodiments of the present application, the cross-sectional profile of the groove is trapezoidal or arcuate.

In an alternative embodiment of the present application, the length direction of the semi-open groove is parallel to the length direction of the tendon.

In an alternative embodiment of the present application, the length of the groove is not less than 150mm, the depth is not more than two thirds of the thickness of the bottom plate, and the width is 50-100 mm.

Such fluting design can ensure that when forming the superimposed sheet, the splice bar or the net piece of putting into the inslot can be in comparatively middle position, can not be too close to the bottom surface edge of bottom plate. Ensuring that the connecting rib has enough anchoring force.

The embodiment of the application provides a splicing structure of a laminated slab, which comprises a rear connecting steel bar, a splicing layer and any one of the prefabricated bottom plates of the laminated slab, wherein the bottom plate can be spliced with other bottom plates, or the bottom plate can be spliced with a wall body or a beam, and the rear connecting steel bar is arranged in the groove or the semi-open groove communicated with the two adjacent bottom plates;

or the rear connecting steel bars are arranged between the bottom plate and the wall body or the beam, and part of the structure of the rear connecting steel bars is positioned in the grooves;

the superposed layer is poured on the top surface of the bottom plate and covers the rear connecting steel bars.

Through using the prefabricated bottom plate of superimposed sheet, superimposed sheet concatenation structure is under construction more convenient when building, and the structural strength after the shaping also is guaranteed.

In an optional embodiment of the present application, when two of the prefabricated bottom plates of the superimposed sheet are combined, the side walls of the two of the prefabricated bottom plates of the superimposed sheet close to each other are attached to each other.

The side wall is directly attached, so that the use of a die can be omitted, and the construction speed is accelerated.

In an optional embodiment of the application, when the rear connecting steel bars need to be placed in the half-open slots, the rear connecting steel bars are steel bar meshes;

when the rear connecting steel bars need to be placed in the grooves, the rear connecting steel bars are connecting bars.

According to the difference of the grooves, different rear connecting steel bars can be placed respectively, after the concrete composite slab is poured, the slab is more stably connected with the slab, the wall or the beam, and the prefabricated bottom plate of the composite slab and the poured concrete can form the concrete composite slab with bidirectional stress.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of one type of laminated slab prefabricated floor provided by an embodiment of the present application;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the two laminated slab prefabricated base boards of FIG. 1 in combination;

FIG. 4 is a partial view of the middle part of FIG. 3 cut away;

FIG. 5 is a schematic view of the position of the prefabricated floor panels of the composite slab of FIG. 1 engaged with a wall or beam;

FIG. 6 is a schematic view of the positions of the two composite slab prefabricated floors of FIG. 1 engaged with a wall or beam;

FIG. 7 is a schematic view of another type of laminated slab prefabricated floor panel provided by an embodiment of the present application;

FIG. 8 is a partial cross-sectional view of FIG. 7;

FIG. 9 is a schematic view of the two laminated slab prefabricated base panels of FIG. 7 in combination;

FIG. 10 is a partial view of the middle portion of FIG. 9 taken in cross-section;

fig. 11 is a schematic view showing a position where the prefabricated floor panels of the composite slab of fig. 7 are coupled to a wall or a girder.

Icon: 10-a base plate; 20-prestressed tendons; 30-reinforcing mesh; 40-a wall body; 50-beam; 60-connecting ribs; 70-additional steel bars; 80-reinforcing mesh; 90-casting a laminated layer in situ; 101-a groove; 102-semi-open channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1 and 7, an embodiment of the present application provides a laminated slab prefabricated floor, including: bottom plate 10, prestressing tendons 20 and reinforcing bar net piece 30.

The bottom plate 10 is square, the top of the bottom plate 10 is provided with grooves 101 at intervals along three sides (the type shown in fig. 7) or four sides (the type shown in fig. 1), when the three sides of the top of the bottom plate 10 are provided with the grooves 101, the other side is provided with a half-open groove 102 extending along the length direction, and the prestressed tendons 20 and the reinforcing mesh 30 are embedded in the bottom plate 10 and do not extend out of the bottom plate 10.

The reinforcing mesh 30 and the reinforcing mesh 80 are meshes made of reinforcing bars, and mainly in this embodiment, the positions and the sizes of the reinforcing mesh 30 and the reinforcing mesh 80 are different, so that the reinforcing mesh is shown by different reference numerals in the text, and it is not limited that the sizes and the sizes thereof are different or the corresponding performance parameters are different.

Simply speaking, through using reinforcing bar net piece 30 cooperation prestressing tendons 20, can ensure the rigidity of superimposed sheet prefabricated bottom plate under the condition of not using the truss muscle, reduce with the steel volume, and when needs bury the pipeline underground, also need not follow and alternate between the steel truss, more conveniently lay. Because the prestressed tendons 20 and the reinforcing mesh 30 do not extend out of the bottom plate 10, a special die does not need to be customized during die design, the repeated utilization rate of the die is improved, the die cost is reduced, and the production efficiency is improved. And moreover, the prestressed tendons 20 and the reinforcing mesh 30 do not extend out, the interference of the beard tendons (namely, the tendons extend out of the bottom plate, like the beard of the bottom plate) does not need to be considered, and the transportation and the use are convenient.

Referring to fig. 2 or fig. 8, in the embodiment, the reinforcing bars of the reinforcing mesh 30 and the grooves 101 may be arranged in a staggered manner, and the reinforcing bars of the reinforcing mesh 30 are not embedded in the bottom wall of the groove bottom of the groove 101. Since the groove 101 is formed using a mold, interference between the mold and the mesh reinforcement 30 during the production process can be prevented by avoiding the reinforcement of the mesh reinforcement 30.

Further, the grooves 101 on each side of the present embodiment are distributed at intervals according to a predetermined modulus. The specific modulus can be determined according to the size and performance requirements of the laminated slab prefabricated base plate 10 to be manufactured. In addition, when special needs exist, the preset modulus of different sides can be different, the post-cast connecting steel bars can be placed according to the actual grooves 101 distributed according to the preset modulus, and when the post-cast connecting steel bars are connected with other laminated slab prefabricated bottom plates or the wall body 40 and the beam 50, the connecting steel bars 60 (shown in fig. 3) or the steel bar net sheets 80 (shown in fig. 9) are added with post-cast concrete, so that the reliable connection is realized.

In the present embodiment, the cross-sectional profile of the groove 101 is trapezoidal or arcuate. The trapezoidal or arc shape is convenient for demoulding. And the mould can set up the chamfer, further makes things convenient for the drawing of patterns. In addition, the length of the groove 101 is not less than 150mm, the depth is not more than two thirds of the thickness of the bottom plate 10, and the width is 50-100 mm. Due to the adoption of the grooving design, when the laminated slab is formed, the connecting ribs 60 or the reinforcing mesh sheets 80 placed in the grooves can be positioned at a middle position and cannot be too close to the bottom edge of the bottom plate 10. Ensuring that the connecting rib has enough anchoring force.

When one side is the half-open groove 102, the surfaces of the groove wall and the bottom wall of the half-open groove 102 are rough surfaces. Due to the rough surface, more contact surfaces can be formed between the concrete and the rough surface during pouring, and the connection reliability is improved. Further, the length direction of the half-open groove 102 is parallel to the length direction of the tendon 20. Due to the parallel directions, the structural strength of the position of the semi-open groove 102 can be guaranteed, which is also the main stress direction, and due to the consistent directions, the structure cannot be damaged due to the thinner thickness when the main stress is applied.

The embodiment of the application provides a splicing structure of a laminated slab, which comprises a rear connecting steel bar, a splicing layer and a prefabricated bottom plate of the laminated slab, wherein the bottom plate 10 can be spliced with another bottom plate 10, or the bottom plate 10 can be spliced with a wall body 40 or a beam 50, and the rear connecting steel bar is arranged in a groove 101 or a semi-open groove 102 communicated with two adjacent bottom plates 10;

or the rear connecting steel bars are arranged between the bottom plate 10 and the wall 40 or the beam 50, and part of the rear connecting steel bars are positioned in the grooves 101;

the laminated layer is poured on the top surface of the bottom plate 10 and covers the rear connecting steel bars.

Simply speaking, through using the prefabricated bottom plate of superimposed sheet, the construction is more convenient when superimposed sheet concatenation structure builds, and the structural strength after the shaping is also guaranteed.

When the two laminated slab prefabricated bottom plates are spliced, the side walls, close to the bottom plate 10, of the two laminated slab prefabricated bottom plates are attached to each other. The side wall is directly attached, so that the use of a die can be omitted, and the construction speed is accelerated.

It should be noted that, the fitting herein does not mean that there is no gap at all, and there may be a gap between two prefabricated bottom plates of the composite slab, but the gap is not large enough to cause the poured concrete to leak below the bottom of the prefabricated bottom plate of the composite slab. In this case, the smaller gap is also understood as the two laminated slab prefabricated base plates are placed in a joint manner.

Please refer to fig. 3 to fig. 6 or fig. 11, when the rear connecting steel bar needs to be placed in the groove 101, the rear connecting steel bar is the connecting bar 60; referring to fig. 9 to 10, when the post-connection reinforcing steel bars are required to be placed in the half-open slots 102, the post-connection reinforcing steel bars are reinforcing mesh sheets 80.

According to the difference of the grooves, different rear connecting steel bars can be respectively placed, after the concrete is poured, the connection between the slab and the slab, the wall or the beam 50 is more stable, and the prefabricated bottom plate of the composite slab and the poured concrete (namely the cast-in-situ composite layer 90 in each figure) can form a concrete composite slab stressed in two directions.

Further, the prefabricated floor of the laminated slab may be reinforced by additional reinforcing bars 70 connected to the wall 40 or the girder 50. So as to further improve the connection stability of the formed laminated slab splicing construction. The cross-sectional dimension of the used additional steel bar 70 is equal to the cross-sectional dimension of the steel mesh 30 of the prefabricated bottom plate of the laminated slab, and after the cast-in-situ laminated layer 90 is formed, the cross-sectional reinforcement ratio of the cast-in-situ laminated layer 90 is equal to the cross-sectional reinforcement ratio of the prefabricated bottom plate of the laminated slab.

The principle of the embodiment is as follows:

in consideration of a plurality of disadvantages caused by the use of truss ribs, the laminated slab prefabricated bottom plate adopts the prestressed ribs 20 to ensure the bearing capacity and the anti-cracking performance, and the whole quantity of reinforcing steel bars is reduced compared with the prior art. And the labor cost is reduced while the material cost is reduced.

In addition, because no reinforcing steel bars extend out from the periphery of the bottom plate 10, the universal die can be designed when the corresponding die is designed, the die corresponding to the side opening of a certain specification plate is not required to be specially customized, and the die is effective in saving die cost and reducing manufacturing difficulty. And during the transportation, also need not to design corresponding safeguard measure for the reinforcing bar of expenditure again, and saved the space of transportation, to same transportation equipment, can transport more superimposed sheet prefabricated bottom plate once only.

Based on this superimposed sheet prefabricated bottom plate, can form a superimposed sheet concatenation structure with the prefabricated bottom plate of other superimposed sheet, also can cooperate with wall 40, cooperate with roof beam 50, form other superimposed sheet concatenation structure.

Specifically, referring to fig. 3 and 4, when two laminated slab prefabricated base plates are combined, the two laminated slab prefabricated base plates are directly combined together without a mold at the combining position, or a narrow joint seam is reserved, so that the grooves 101 corresponding to the two laminated slab prefabricated base plates are connected, and then the connecting ribs 60 are placed in the two connected grooves 101. Then, the additional steel bar 70 is placed, and concrete is poured to form the cast-in-place laminated layer 90. Due to the existence of the connecting ribs 60, the connection between the two laminated slab prefabricated bottom plates is very reliable and is not easy to break in the using process.

So, for the construction, need not be like prior art is general, need pay attention to the reinforcing bar of spending all around, avoid the reinforcing bar collision between board and the board. Therefore, when the laminated slab prefabricated bottom plate is placed, the risk of damage can be avoided more quickly, and the connecting ribs 60 can be placed in the subsequent operation. In addition, the prestressed tendons or the reinforcing steel meshes 30 in the bottom plate 10 do not extend out of the grooves 101 or the half-open grooves 102, so that the problem of inconvenient construction caused by the design of corresponding molds or the influence of reinforcing steel bars in the grooves can be further avoided.

When the prefabricated bottom plate of the laminated slab needs to be connected with the wall 40 or the beam 50, as shown in fig. 5 and 6, the prefabricated bottom plate of the laminated slab is firstly abutted against the wall 40 or the beam 50, and then the connecting ribs 60 are placed, wherein one part of the connecting ribs 60 is positioned in the grooves 101, and the other part of the connecting ribs 60 is positioned above the wall 40 or the beam 50. And then after placing the additional reinforcing steel bars 70, pouring can be carried out to form the cast-in-place laminated layer 90.

In the case of a prefabricated floor slab of a composite slab having a semi-open channel 102, the edge provided with the groove 101 is mainly used for connecting with the wall 40 or the beam 50, as shown in fig. 11, and the operation process is the same as that described above with reference to fig. 5 and 6.

Referring to fig. 9 and 10, when the two prefabricated bottom plates of the composite slab are fitted, the semi-open slots 102 of the two prefabricated bottom plates are connected, then the reinforcing mesh 80 can be placed in the semi-open slots 102, and then the cast-in-place composite layer 90 can be formed by pouring. By placing the reinforcing mesh 80, the stress between the two laminated slab prefabricated bottom plates can be continuous, and the fracture of the joint in use due to discontinuous stress is avoided. And the length direction of the semi-open groove 102 is arranged along the direction of the prestressed tendon 20, so that the prestressed tendon 20 can assist in improving the structural strength, and the structural stability when stressed is further ensured.

Whether the groove 101 or the half-open groove 102 is formed, the rear connecting steel bars are placed after the prefabricated bottom plates of the laminated slab are placed, so that the condition that the steel bars are collided to damage the connection reliability between the slab and the slab or between the slab and the wall 40/the beam 50 in the prior art can be avoided during construction. Because the connecting rib 60 or the reinforcing mesh 30 can not be damaged in the construction process, the tensile performance can be fully exerted, and compared with the prior art, the formed laminated slab splicing structure is more reliable.

To sum up, the prefabricated bottom plate of superimposed sheet of this application does not have the reinforcing bar to stretch out from all around, directly has avoided a great deal of because there is the reinforcing bar to influence and the problem that produces, both the production of being convenient for, the transportation and the construction of being convenient for again, still through prestressing tendons 20 and reinforcing bar net piece 30's cooperation simultaneously, has improved intensity, has removed the use of truss muscle from, has practiced thrift the material, after cooperation rearmounted connecting reinforcement, superimposed sheet form superimposed sheet concatenation structure, can ensure the reliability of connecting.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A laminated slab prefabricated floor, comprising: the steel bar net comprises a bottom plate, prestressed tendons and a steel bar net piece;

the bottom plate is square, the top of bottom plate is equipped with the recess along three side or four sides at every side interval, works as the three side at the top of bottom plate is equipped with the recess, half open groove that another side border length direction extends, the prestressing tendons with the reinforcing bar net piece bury underground in the bottom plate and do not follow stretch out in the bottom plate.

2. The prefabricated slab of laminated slab according to claim 1, wherein the reinforcing bars of the mesh reinforcement are arranged in a staggered manner from the grooves, and the reinforcing bars of the mesh reinforcement are not embedded in the bottom walls of the bottoms of the grooves.

3. A laminated panel prefabricated base plate according to claim 1, wherein said grooves of each side are spaced apart by a predetermined modulus.

4. A laminated slab prefabricated floor according to claim 1, wherein surfaces of both the groove wall and the bottom wall of said semi-open groove are roughened.

5. A laminated slab prefabricated floor according to claim 1, wherein a cross-sectional profile of said groove is trapezoidal or curved.

6. A laminated slab prefabricated floor according to claim 1, wherein a longitudinal direction of said half-open groove is parallel to a longitudinal direction of said tendon.

7. A laminated slab prefabricated floor according to claim 1, wherein said grooves have a length of not less than 150mm, a depth of not more than two thirds of a thickness of said floor, and a width of 50 to 100 mm.

8. A splicing construction of a laminated slab, which comprises a rear connecting steel bar, a splicing layer and a prefabricated bottom plate of the laminated slab, wherein the bottom plate can be spliced with another bottom plate or a wall body or a beam, and the rear connecting steel bar is arranged in the communicated groove or the semi-open groove of two adjacent bottom plates;

or the rear connecting steel bars are arranged between the bottom plate and the wall body or the beam, and part of the structure of the rear connecting steel bars is positioned in the grooves;

the superposed layer is poured on the top surface of the bottom plate and covers the rear connecting steel bars.

9. A composite slab splicing construction according to claim 8, wherein when two composite slab prefabricated base boards are spliced, side walls of the two composite slab prefabricated base boards adjacent to each other are attached to each other.

10. A laminated slab splicing construction according to claim 8, wherein when the rear connecting reinforcement is required to be placed in the half-open groove, the rear connecting reinforcement is a reinforcement mesh;

when the rear connecting steel bars need to be placed in the grooves, the rear connecting steel bars are connecting bars.

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