CN220486865U - Large-span support-free laminated slab - Google Patents

Abstract

The utility model provides a large-span support-free laminated slab, which belongs to the field of assembly type buildings, and is characterized in that a temporary supporting piece is creatively used, on one hand, when the laminated bottom plate is prefabricated and then hoisted, the temporary supporting piece is attached to the plate surface of the laminated bottom plate to form a stress support, bending moment of the laminated bottom plate caused by dead weight and other factors is resisted, the plate surface can be prevented from cracking and damaging during hoisting, hoisting points are distributed on the temporary supporting piece, so that the plate surface is uniformly stressed, and the laminated bottom plate cannot be damaged due to hoisting; on the other hand, during assembly, the temporary support piece is arranged on a main building structure (secondary beam or other equivalent beam-column structures) and used for laminating the long-span bottom support of the bottom plate, so that the full-hall support piece is omitted, the temporary support piece can be reused, and the cost and efficiency can be greatly reduced.

Description

Large-span support-free laminated slab

Technical Field

The utility model belongs to the field of assembled buildings, and particularly relates to a large-span support-free laminated slab.

Background

The composite floor slab is a structural form which is widely applied to buildings by combining precast slabs and cast-in-situ concrete. The prefabricated prestressed thin plate (with the thickness of 3.5-5 cm) and the upper cast-in-situ concrete layer are combined into a laminated whole to work together. The prestressed thin plate is used as a bottom die of the cast-in-situ concrete layer, and a template is not required to be additionally supported for the cast-in-situ layer. And the bottom surface of the prestressed thin plate is smooth and flat, and the ceiling can be free from plastering after the plate seams are treated. Along with popularization of the assembled building, the superimposed sheet also forms a large-span plate for the span suitable for building floor slabs, and the large-span plate can form bending moment due to dead weight and the like during hoisting and installation, so that the plate surface is cracked. There are cracking problems during prefabrication and transportation and the need for a bottom-filled support to support the floor during assembly to prevent damage during cast-in-place. How to prevent cracking during prefabrication and hoisting, and to save the process and cost by avoiding the full-hall support (i.e. support-free) during assembly is a problem to be solved in the utility model.

Thus, the present utility model has been completed.

Disclosure of Invention

The utility model aims to provide a laminated slab which prevents the slab surface from cracking in the process of prefabricating and hoisting assembly and is convenient to assemble and install.

To achieve this object, the present utility model provides a large-span support-free laminated slab, comprising:

the composite bottom plate comprises bottom plate structural steel bars, bottom plate concrete and embedded connecting pieces, wherein the bottoms of the embedded connecting pieces are embedded in the bottom plate concrete, and the tops of the embedded connecting pieces are exposed to form connecting sections;

the temporary support piece is detachably arranged on the connecting section, part or all of the temporary support piece is attached to the plate surface of the laminated bottom plate to form stress support, and a hoisting point is arranged on the temporary support piece.

Preferably, the temporary support comprises a support truss and/or a string support assembly.

Preferably, the support truss comprises an upper chord, a lower chord and a web member; the support trusses are arranged along the length direction of the laminated bottom plate.

Preferably, the upper chord comprises an upper chord pipe, and an adjusting support rod for telescopically adjusting the length of the upper chord is inserted into the upper chord pipe.

Preferably, an upper flange plate is arranged at one side of the upper chord close to the top, and a lower flange plate is arranged at the position close to the bottom; and a formwork installing groove is formed between the upper flange plate and the lower flange plate.

Preferably, the embedded connecting piece is a connecting sleeve, a connecting hole is formed in the temporary supporting piece, and the connecting hole is matched with a connecting bolt to connect the temporary supporting piece with the connecting sleeve.

Preferably, the connecting hole is a slotted hole.

Preferably, the folding device further comprises a barrier strip, wherein the barrier strip is provided with a perforation, the connecting bolt penetrates through the barrier strip and is connected with the connecting sleeve in a threaded mode, and the temporary supporting piece is supported by the barrier strip to form a stress support on the folding bottom plate.

Preferably, the bottom of the connecting sleeve is provided with a support, and the support is positioned below the bottom plate structure steel bars inside the laminated bottom plate and limited and blocked by the bottom plate structure steel bars along the hoisting direction.

Preferably, the hoisting point is a hoisting ring.

The technical effects produced by the technical scheme of the utility model are from one or more of the following combinations:

according to the method, the temporary supporting piece is creatively used, on one hand, when the laminated bottom plate is prefabricated and then hoisted, the temporary supporting piece is attached to the plate surface of the laminated bottom plate to form a stress support, bending moment of the laminated bottom plate caused by dead weight and other factors is resisted, the plate surface can be prevented from cracking and being damaged during hoisting, the hoisting points are distributed on the temporary supporting piece, so that the plate surface can be uniformly stressed, and the laminated bottom plate cannot be damaged due to hoisting; on the other hand, during assembly, the temporary support can be detached and installed on a main building structure (secondary beam or other equivalent beam-column structures) for overlapping the long-span bottom support of the bottom plate, so that the full-hall support is omitted, the temporary support can be reused, and the cost and the efficiency can be greatly reduced.

The temporary support can be prefabricated in batches according to a certain size, the requirements of different span superposed bottom plates can be met through superposition in number, and the temporary support can be reused.

The temporary support piece comprises a support truss or a string support assembly, can be repeatedly used and is convenient to install.

Fixing the temporary supporting piece when the embedded connecting piece on the superposed bottom plate is hoisted; when the assembly and installation are carried out, the temporary supporting piece is detached to be used as the bottom temporary supporting piece, and the connecting piece on the superposed bottom plate is implemented as a bolting piece with cast-in-place concrete, so that the traditional bolting piece is omitted.

Drawings

FIG. 1 shows a schematic structural view of a large-span support-free laminated slab in the utility model.

Figure 2 shows a schematic view of a partial structure of a support truss according to the present utility model.

Fig. 3 shows a structural position diagram of the connecting holes on the support truss according to the present utility model.

Fig. 4 shows a structural view of the pre-buried connector on the laminated base plate according to the present utility model.

Fig. 5 shows a structural position diagram of the bottom plate structural reinforcement and the connecting sleeve in the present utility model.

Fig. 6 shows a schematic structural view of the support truss according to the present utility model.

Fig. 7 shows a schematic installation view of the connecting bolts on the support truss according to the present utility model.

Fig. 8 shows a schematic structural view of the structural reinforcement of the base plate, the connecting sleeve and the connecting bolt in the utility model.

Fig. 9 shows an illustration of the mounting node of the connecting sleeve and the connecting bolt according to the utility model.

Fig. 10 shows a schematic structural view of the connecting bolt and the barrier rib according to the present utility model.

Fig. 11 shows a state in which the laminate flooring of the present utility model is temporarily supported by the temporary support member.

Fig. 12 shows another view of fig. 11.

FIG. 13 shows an installation display of the stay-free system of the large-span laminated slab of the present utility model.

FIG. 14 shows a position diagram of the ends of the stay-free system of the large span composite slab and the main structure of the building in the present utility model.

Fig. 15 shows a state in which the adjusting support bar is erected on the main structure of the building according to the present utility model.

Fig. 16 shows a structural representation of the upper chord of the adjustable brace and the brace truss of the present utility model.

FIG. 17 shows a mold support position diagram of the post-cast strip of the present utility model.

Figure 18 shows another form of structural view of the support truss of the utility model.

Detailed Description

The following description is presented to enable one skilled in the art to make and use the utility model and to incorporate it into the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to persons skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without limitation to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present utility model.

The reader is directed to all documents and documents filed concurrently with this specification and open to public inspection with this specification, and the contents of all such documents and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic set of equivalent or similar features.

Note that where used, the designations left, right, front, back, top, bottom, forward, reverse, clockwise, and counterclockwise are used for convenience only and do not imply any particular orientation of securement. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Note that, where used, further, preferably, further and more preferably, the brief description of another embodiment is made on the basis of the foregoing embodiment, and further, preferably, further or more preferably, the combination of the contents of the rear band with the foregoing embodiment is made as a complete construction of another embodiment. A further embodiment is composed of several further, preferably, still further or preferably arrangements of the strips after the same embodiment, which may be combined arbitrarily.

The utility model is described in detail below with reference to the drawings and the specific embodiments. It is noted that the aspects described below in connection with the drawings and the specific embodiments are merely exemplary and should not be construed as limiting the scope of the utility model in any way.

Referring to fig. 1 to 18, the present embodiment provides a large-span support-free laminated slab, which includes a laminated base plate 1 and a temporary support 2. The temporary support 2 is temporarily mounted on the laminate base 1 after the laminate base 1 is prefabricated in a factory (state of fig. 1), and its main purpose is to provide stress support of one panel surface, preventing the laminate base 1 from being damaged. The temporary support 2 is detached during the field assembly to be used as a bottom support (in the state of fig. 11-13) for pouring the upper layer of cast-in-place concrete of the laminated bottom plate 1, so that full-hall support (i.e. support-free) is avoided.

Referring to fig. 1 to 10, an embedded connecting piece 12 is disposed on a laminated base plate 1, a portion of the embedded connecting piece 12 is exposed to form a connecting section, a temporary supporting piece 2 is detachably mounted on the connecting section and partially or fully abuts against a plate surface of the laminated base plate 1 to form a stress support, and a lifting point 221 is disposed on the temporary supporting piece 2. Specifically, the laminated bottom plate 1 comprises a bottom plate structural steel bar 11, bottom plate concrete and a pre-buried connecting piece 12, wherein the bottom of the pre-buried connecting piece 12 is buried in the bottom plate concrete, and the top of the pre-buried connecting piece is exposed to form the connecting section.

It should be noted that the temporary support 2 comprises a support truss and/or a string support assembly. It is explained that the temporary support 2 may be a support truss or a string support assembly; alternatively, when the number of temporary supports 2 is two or more, it may be used in combination with the support truss and string support assembly. The present embodiment will be described in detail with reference to the accompanying drawings, in which the temporary support 2 is a support truss.

The assembly of the laminated base plate 1 and the temporary supporting piece 2 is completed in a factory prefabrication stage, the laminated base plate 1 is provided with base plate structural steel bars 11 on a factory pouring die, and pre-buried connecting pieces 12 are bound on the structural steel bars and then poured into shape.

Further, the pre-buried connector 12 is implemented as a connection sleeve for easy installation connection. Preferably, the inner wall of the connecting sleeve is provided with internal threads to facilitate the connection of the subsequent connecting bolts 26, and the outer wall of the connecting sleeve can also be provided with external threads to increase the bond strength with the concrete of the laminated bottom plate 1.

In order to further improve the gripping capacity of the connecting sleeve, the stability of the connecting sleeve in the concrete of the superposed bottom plate 1 is improved, and sufficient bearing capacity is provided for subsequent hoisting of the temporary support 2. In a preferred embodiment of the present embodiment, a support 121 is disposed at the bottom of the connecting sleeve, and the support 121 is located below the bottom plate structural reinforcement 11 inside the laminated bottom plate 1 and is limited and blocked by the bottom plate structural reinforcement 11 along the hoisting direction. Likewise, the connecting sleeve can be bound or welded to the structural reinforcement of the superimposed base plate 1.

Referring to fig. 12-18, the support truss includes an upper chord 21, a lower chord 23, and web members 22 (or webs, here the conventional definition of truss, and not by way of limitation). The support trusses are arranged along the length direction of the laminated bottom plate 1. Preferably, the upper chord 21 and the lower chord 23 are square steel pipes, and extend on two sides to form an upper flange plate 24 and a lower flange plate 25 respectively, and the middle web member 22 adopts a wave-shaped frame combination member.

A formwork mounting groove 241 is formed between the upper flange plate 24 and the lower flange plate 25 of the upper chord 21, and when the laminated base plates 1 are assembled, the post-cast strip pouring formwork between the adjacent laminated base plates 1 is mounted and supported by the post-cast strip formwork support 31, and the post-cast strip formwork support 31 is mounted in the formwork mounting groove 241. At this time, the temporary supports 2 have been detached for use as bottom temporary supports, and thus the post-cast strip formwork support 31 is mounted between the formwork mounting grooves 241 of the two temporary supports 2.

In this step, the temporary support 2 is partially or entirely abutted against the plate surface of the superimposed bottom plate 1 to form a stress support, and the partial abutment is interpreted as that when the side portions of the support truss are abutted against the plate surface of the superimposed bottom plate 1 as described above, the side flanges (upper flange 24 and lower flange 25) of the upper chord 21 and lower chord 23 of the support truss are abutted against the plate surface to form a stress support, and the support truss is arranged in the plate length direction. All abutment is interpreted as when the side surfaces of the upper chord 21, the lower chord 23 and the web members 22 are coplanar, the side surfaces all form a stress support against the deck.

The connecting holes 211 are formed in the support truss, so that the connecting sleeve is conveniently penetrated and connected with the connecting bolts 26 in a threaded manner. Preferably, the connection hole 211 is provided on the upper chord 21 (square steel pipe) at a position between the upper flange plate 24 and the lower flange plate 25, and further, the connection hole 211 is implemented as a oblong hole.

In order to further facilitate the installation of the temporary support 2, this embodiment further includes a blocking strip 27, where the blocking strip 27 is provided with a through hole, and the connecting bolt 26 is threaded through the blocking strip 27 and is connected to the connecting sleeve in a threaded manner, and the blocking strip 27 supports the temporary support 2 to form a stress support on the laminated bottom plate 1.

The hoisting points 221 of the support truss are embodied as hoisting rings, which are provided on the web members 22 of the support truss.

When it is required to be indicated, the number of the hoisting points 221 and the pre-buried connecting pieces 12 is not limited in the embodiment, and even the number of the temporary supporting pieces 2 is not limited, and the number of the temporary supporting pieces 2 on each laminated base plate 1 is two in the embodiment.

Referring to fig. 15 and 16 in combination with fig. 18, in order to meet the supporting requirement of the large-span laminated base plate 1, the temporary supporting member 2 may be a telescopic structure. Specifically, when the upper chord 21 of the support truss is an upper chord pipe, an adjusting support rod 28 for adjusting the length of the upper chord 21 in a telescopic manner is inserted into the upper chord pipe, so that the temporary support 2 is convenient to detach and adjust the span support when the bottom of the laminated bottom plate 1 is temporarily supported.

The beneficial effects of this embodiment are:

when the laminated bottom plate 1 is hoisted after prefabrication, the temporary supporting piece 2 is attached to the plate surface of the laminated bottom plate 1 to form a stress support, bending moment of the laminated bottom plate 1 caused by dead weight and other factors is resisted, the plate surface can be prevented from cracking and damaging during hoisting, the hoisting points 221 are distributed on the temporary support, so that the plate surface is uniformly stressed, and the laminated bottom plate 1 cannot be damaged due to hoisting; during assembly, the temporary support 2 is detached and installed on the building main body structure 4 (secondary beam or other equivalent beam-column structures) for overlapping the long-span bottom support of the bottom plate 1, so that the full-hall support is omitted, the temporary support can be reused, and the cost and efficiency can be greatly reduced.

The temporary supports 2 can be prefabricated in batches according to a certain size, the requirements of the different span overlapping base plates 1 can be realized by overlapping in number, and the temporary supports 2 can be reused.

For traditional superimposed sheet installation, post-cast strip 3 between the adjacent superimposed sheet bottom plates 1 needs to fill the hall support to support post-cast strip and pour the template, thereby this application sets up post-cast strip and pour the template through setting up post-cast strip template support piece 31 between temporary support piece 2 to remove from filling the hall support, saved the space for the lower floor.

The temporary support 2 comprises a support truss or a string support assembly, can be repeatedly used and is convenient to install.

The temporary support 2 is fixed when the embedded connecting piece 12 on the superposed bottom plate 1 is hoisted; during assembly and installation, the temporary support 2 is detached to be used as a bottom temporary support, and the connecting piece on the superposed bottom plate 1 is implemented as a bolting piece with cast-in-place concrete, so that the traditional bolting piece is omitted. When the pre-buried coupler is implemented as a connecting sleeve, it also has a bolting effect superior to that of conventional studs and bars in cooperation with the stop bars 27.

Further, while the utility model has been described in detail with reference to the embodiments thereof, those skilled in the art will appreciate that various modifications can be made to the utility model in light of the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the utility model, which is defined by the appended claims.

Claims (10)

1. Large-span exempts from to prop superimposed sheet, its characterized in that includes:

the composite bottom plate comprises bottom plate structural steel bars, bottom plate concrete and embedded connecting pieces, wherein the bottoms of the embedded connecting pieces are embedded in the bottom plate concrete, and the tops of the embedded connecting pieces are exposed to form connecting sections;

the temporary support piece is detachably arranged on the connecting section, part or all of the temporary support piece is attached to the plate surface of the laminated bottom plate to form stress support, and a hoisting point is arranged on the temporary support piece.

2. The large span stay free composite panel of claim 1, wherein: the temporary support includes a support truss and/or a string support assembly.

3. The large span stay free composite panel of claim 2, wherein: the support truss comprises an upper chord, a lower chord and a web member; the support trusses are arranged along the length direction of the laminated bottom plate.

4. A large span stay free composite panel according to claim 3, wherein: the upper chord comprises an upper chord pipe, and an adjusting support rod for telescopically adjusting the length of the upper chord is inserted into the upper chord pipe.

5. A large span stay free composite panel according to claim 3, wherein: an upper flange plate is arranged at one side of the upper chord close to the top, and a lower flange plate is arranged at the position close to the bottom; and a formwork installing groove is formed between the upper flange plate and the lower flange plate.

6. The large span stay free composite panel of claim 1, wherein: the embedded connecting piece is a connecting sleeve, a connecting hole is formed in the temporary supporting piece, and the connecting hole is matched with a connecting bolt to connect the temporary supporting piece to the connecting sleeve.

7. The large span stay free composite panel of claim 6, wherein: the connecting hole is a slotted hole.

8. The large span stay free composite panel of claim 6, wherein: the connecting bolt is arranged on the connecting sleeve in a penetrating mode, the temporary supporting piece is supported by the blocking strip, and stress support is formed on the superposed bottom plate.

9. The large span stay free composite panel of claim 6, wherein: the bottom of the connecting sleeve is provided with a support, and the support is positioned below the bottom plate structure steel bars inside the superposed bottom plate and limited and blocked by the bottom plate structure steel bars along the hoisting direction.

10. The large span stay free composite panel of claim 1, wherein: the hoisting point is a hoisting ring.