CN219060601U

CN219060601U - Superimposed beam and superimposed floor slab

Info

Publication number: CN219060601U
Application number: CN202223280987.6U
Authority: CN
Inventors: 郝坤超; 彭礼; 李国强
Original assignee: Shanghai T&d Architectural Science And Technology Co ltd; Shanghai Wansida Construction Technology Co ltd
Current assignee: Shanghai Concrete Construction Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-23
Anticipated expiration: 2032-12-08

Abstract

The utility model provides a superposed beam and a superposed floor slab, wherein the superposed beam comprises a precast concrete bottom plate 11, a steel pipe web member 13, a precast concrete upper chord member 12 and cast-in-place concrete; wherein the precast concrete deck 11, the steel web members 13 and the precast concrete upper chord members 12 are combined to form a precast portion, which in this embodiment is explained as a composite beam member, and cast-in-place concrete is a cast-in-place portion.

Description

Superimposed beam and superimposed floor slab

Technical Field

The utility model relates to the field of assembled structures, in particular to a superposed beam and a superposed floor slab.

Background

The superposed beam is a beam obtained by casting concrete twice, and is manufactured into a precast beam in a precast field for the first time; the second time is carried out on the construction site, and when the precast beam is hoisted and placed, the concrete at the upper part is poured and smashed to be connected into a whole. The laminated beam can be a one-stage stress laminated beam and a two-stage stress laminated beam according to stress performance. The former means that the construction stage is provided with a reliable support under the precast beam, and the load applied in the construction stage can be guaranteed to be fully transferred to the support, while the latter means that the construction stage is not provided with the support under the simply supported precast beam, and the whole load in the construction stage is fully borne by the precast beam.

The cross section of the laminated beam is generally rectangular or T-shaped, and in the assembled integral frame structure, the precast beam is often made into a T-shaped cross section, and after the precast slab is installed in place, the cast part of concrete is reproduced, so-called laminated beam is formed. The existing precast concrete superposed beam has heavy self weight, high crane requirement and high manufacturing cost, and the superposed slab cannot be reliably placed on the precast superposed beam.

Disclosure of Invention

The utility model aims to solve the problem of heavy self weight of the existing laminated beam, and provides a new fabricated laminated beam method for reducing the content and the self weight of the concrete in the prefabricated part;

another object of the utility model is to reduce the amount of temporary support;

it is a further object of the present utility model to increase the hooping capacity of the rebar and increase the shear capacity of the concrete beam.

In order to achieve any of the above objects, the present utility model provides a laminated beam, comprising: precast concrete bottom plates, wavy steel pipe web members, precast concrete upper chords and cast-in-place concrete; the wave crest of the steel pipe web member is fixed on the precast concrete upper chord member, and the wave trough of the steel pipe web member is fixed on the precast concrete bottom plate; the precast concrete bottom plate, the steel pipe web members and the precast concrete upper chords form a superposed beam member, and cast-in-place concrete is poured on the steel pipe web members and the precast concrete upper chords on the precast concrete bottom plate.

In a preferred embodiment of the utility model, steel bars are arranged in the precast concrete base plate, and the steel bars are arranged higher than the trough of the steel pipe web member.

The preferable embodiment of the utility model further comprises stirrups, wherein the stirrups pass through the inner sides of the wave troughs of the web members and are hooped on the steel bars; the bottom of the stirrup is buried and fixed in the precast concrete bottom plate.

According to the preferred embodiment of the utility model, the precast concrete bottom plate is in an inverted trapezoid shape, two lugs for installing the pouring template are formed at the top of the precast concrete bottom plate, and the two lugs extend out of two sides of the stirrup respectively.

In the preferred embodiment of the utility model, the precast concrete upper chord members in the superposed beam members are flat rods, the steel pipe web members are arranged in two rows, and the two rows of steel pipe web members are arranged in parallel at intervals.

In the preferred embodiment of the utility model, the superposed beam member is triangular, the steel pipe web members are arranged in two rows, and the two rows of steel pipe web members and the precast concrete upper chord members form the triangular superposed beam member.

In a preferred embodiment of the present utility model, the peaks and valleys of the web members are flat.

In a preferred embodiment of the present utility model, the thickness of the precast concrete deck is less than half the height of the composite girder.

The utility model also provides a composite floor slab which is characterized by comprising a composite bottom plate, a structural layer, a pouring layer and the composite beam; the laminated bottom plate is arranged on the side part of the laminated beam, the structural layer is arranged on the laminated bottom plate and positioned on the side part of the laminated beam member, and the pouring layer is used for pouring the laminated beam member of the laminated beam and is integrated with the structural layer.

The utility model further comprises a pouring template, wherein the pouring template is vertically arranged on the precast concrete base plate and positioned on two sides of the superposed beam member, and the superposed base plate is arranged on the pouring template.

The beneficial effects of the utility model are as follows:

the utility model provides a new method for manufacturing an assembled frame beam, wherein the prefabricated part has low concrete content and light dead weight;

the self-carrying superposed beam member has good vertical rigidity and small temporary supporting dosage;

the bottom edge is provided with a picking lug, so that the prefabricated part of the laminated slab can be conveniently placed;

the middle part of the stirrup is hooked by the flat web members with peaks and troughs, the hoop capacity of the stirrup is increased, and the wave-shaped web members increase the shearing capacity of the concrete beam.

Drawings

Fig. 1 shows a schematic structural view of a laminated beam according to the utility model.

Fig. 2 shows a schematic structural view of a composite floor slab according to the utility model.

Fig. 3 shows another schematic structure of the composite floor slab according to the utility model.

Fig. 4 shows a schematic structural view of a composite beam member according to the present utility model.

Fig. 5 shows another schematic structural view of the composite beam member of the present utility model.

Fig. 6 shows a schematic view of still another structure of the composite beam member according to the present 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.

Example 1:

the present embodiment provides a composite beam comprising prefabricated parts and cast-in-place parts, thereby forming a composite concept, mainly for use in fabricated structures. In the embodiment, the superposed beam comprises a precast concrete base plate 11, a wavy steel pipe web member 13, a precast concrete upper chord member 12 and cast-in-place concrete; wherein the precast concrete deck 11, the steel web members 13 and the precast concrete upper chord members 12 are combined to form a precast portion, which in this embodiment is explained as a composite beam member, and cast-in-place concrete is a cast-in-place portion.

The peaks 131 of the steel pipe web 13 are fixed to the precast concrete upper chord 12, and the valleys 132 of the steel pipe web 13 are fixed to the precast concrete floor panels 11. The cast-in-place concrete is poured on the steel pipe web member 13 and the precast concrete upper chord member 12 on the precast concrete base plate 11 to form a superposed beam.

Referring to fig. 1 and 2, the steel pipe web member 13 in fig. 2 is in a single-row structure, the precast concrete base plate 11 is used as a precast structure, for strengthening strength, steel bars 111 are arranged in the precast concrete base plate 11, trough 132 of the steel pipe web member 13 is buried in the precast concrete base plate 11, and the steel bars 111 in the precast concrete base plate 11 are also arranged at a position higher than the trough 132 of the steel pipe web member 13, so that a height space difference is formed between the two positions.

In the height space difference formed between the precast concrete base plate 11 and the trough 132 of the steel pipe web member 13, the stirrup 14 is hooped to pass through the space difference, the stirrup 14 is used as a connecting piece of the precast part and the cast-in-place part, the bottom of the stirrup 14 is positioned in the height space difference, and the top of the stirrup is hooped with the structural upper layer steel bar 15 in the cast-in-place concrete to form a whole.

The precast concrete deck 11 is prefabricated at a factory, considering on the one hand the formwork support point at the cast-in-place stage and on the other hand the convenience of factory prefabrication. Preferably, the shape of the precast concrete deck 11 is selected to be an inverted trapezoid.

Referring to fig. 3, the installation form of the pouring formwork 16 is shown in fig. 3, and two lugs 112 for installing the pouring formwork 16 are formed on the top of the inverted trapezoidal precast concrete base plate 11, and the two lugs 112 extend outside two sides of the stirrup 14 respectively. The purpose is to facilitate the support of the pouring template 16 when pouring the stirrup 14 and the floor slab in the cast-in-place stage. Preferably, the pouring templates 16 positioned on two sides of the laminated beam member are fixed in a tie manner through tie bolts 17. In the cast-in-situ stage, the cast-in-situ part of the superposed beam and the floor slab casting layer 23 are integrally cast to form a T shape, and a large amount of layer height space can be saved due to the same elevation of the cast-in-situ part of the superposed beam and the floor slab, so that the cast-in-situ part of the superposed beam accords with the concept of an assembled building.

Further, the laminated beam member has several structural forms in this embodiment, and two specific implementations are provided in this embodiment in combination with the accompanying drawings, as follows:

first, referring to fig. 4, the steel pipe web members 13 and the precast concrete upper chord members 12 in the composite beam member are combined to form a single row member, and the number of the single row members is one.

Secondly, referring to fig. 5, the precast concrete upper chord member 12 is a flat bar, the number of the steel pipe web members 13 is two, the two steel pipe web members 13 are arranged between the precast concrete base plate 11 and the flat bar side by side, at this time, the precast concrete upper chord member 12 is a flat bar, and the crests 131 and the troughs 132 of the two rows of steel pipe web members 13 are flattened and respectively buried and fixed in the flat bar and the precast concrete base plate 11.

Thirdly, referring to fig. 6, the laminated beam member is triangular, two rows of steel pipe web members 13, and the two rows of steel pipe web members 13 and the precast concrete upper chord member 12 form a triangular laminated beam member.

Preferably, no matter the first, the second or the third, the structural ribs 121 are arranged in the precast concrete upper chord member 12, the reinforcing steel bars 111 are arranged in the precast concrete bottom plate 11, and the steel pipe web members 13 and the structural ribs 121 are welded and fixed.

The peaks 131 and valleys 132 of the steel web member 13 are flat. In the actual implementation process, the steel pipe web member 13 can be flattened. On the one hand, the flat processing of the wave crests 131 and the wave troughs 132 can better realize the welding of the steel pipe web members 13 and the structural ribs in the precast concrete upper chords 12 and the precast concrete bottom plates 11, and also strengthen the engagement degree between the precast concrete upper chords 12 and the precast concrete bottom plates 11 and the steel pipe web members 13.

The precast concrete deck 11 of the precast section is precast at a factory, and its top elevation cannot exceed the elevation of the floor slab, and preferably, the thickness of the precast concrete deck 11 is less than half the height of the composite beam.

Example 2:

this embodiment provides a composite floor slab, which comprises the composite floor slab 21 in embodiment 1, and further comprises a structural layer and a pouring layer 23. The laminated bottom plate 21 is arranged on the side part of the laminated beam, the structural layer is arranged on the laminated bottom plate 21 and is positioned on the side part of the laminated beam member, and the pouring layer 23 is used for pouring the laminated beam member and is integrated with the structural layer and the laminated bottom plate 21. The composite floor slab is prefabricated in a factory through prefabricated parts of the composite beam and the composite bottom plate 21, then is installed on site, and is integrally cast with cast-in-place parts of the composite bottom plate 21 and the composite beam when a floor is cast, so that the composite floor slab is formed.

Furthermore, the cast-in-situ part of the laminated beam is also provided with a reinforcing steel bar 15, and the stirrup 14 is hooped on the reinforcing steel bar 15 to strengthen the strength of the cast-in-situ part.

In particular, the structural layer may also be a truss member that includes structural layer upper chords 24 and structural layer web members 22. The web members 22 are in a continuous wave shape, and the wave crests and wave troughs of the web members 22 are respectively connected with the upper chord 24 of the structural layer and the superposed bottom plate 21.

The composite floor slab further comprises a pouring template 16, wherein the pouring template 16 is vertically arranged on the precast concrete base plate 11 and positioned on two sides of the composite beam member, and the composite base plate 21 is arranged on the pouring template 16. The superimposed base plate 21 is used as a disassembly-free bottom die of the floor slab pouring layer 23, and is required to form an integral template together with the pouring template 16. The pouring templates 16 positioned on the two sides of the superposed beam member are fixed in a tie manner through tie bolts 17.

Of course, the casting form 16 is just one implementation of the present embodiment, and is suitable for the case that a gap exists between the lug 112 of the precast concrete deck 11 and the laminated deck 21, and the laminated deck 21 is a thick plate. According to the actual size construction, if there is no gap between the precast concrete deck 11 and the laminate deck 21, the laminate deck 21 is a thin plate at this time, and the laminate deck 21 may be directly disposed on the lug 112. The laminated bottom plate 21 is a hollow thick plate, and the laminated beam and the hollow thick plate together form a mould-free and support-free semi-prefabricated frame structure system.

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

1. A composite beam, comprising: precast concrete bottom plates, wavy steel pipe web members, precast concrete upper chords and cast-in-place concrete; the wave crest of the steel pipe web member is fixed on the precast concrete upper chord member, and the wave trough of the steel pipe web member is fixed on the precast concrete bottom plate; the precast concrete bottom plate, the steel pipe web members and the precast concrete upper chords form a superposed beam member, and cast-in-place concrete is poured on the steel pipe web members and the precast concrete upper chords on the precast concrete bottom plate.

2. The composite beam of claim 1, wherein: and steel bars are arranged in the precast concrete bottom plate and are arranged higher than the trough of the steel pipe web member.

3. A composite beam as claimed in claim 2, wherein: the steel pipe web member further comprises stirrups, wherein the stirrups are hooped on the superposed beam member, pass through the inner sides of the wave troughs of the steel pipe web members and are hooped on the steel bars; the bottom of the stirrup is buried and fixed in the precast concrete bottom plate.

4. A composite beam as claimed in claim 3, wherein: the precast concrete bottom plate is of an inverted trapezoid shape, two protruding lugs for mounting a pouring template or placing a superposed floor slab are formed at the top of the precast concrete bottom plate, and the two protruding lugs extend out of two sides of the stirrup respectively.

5. The composite beam of claim 1, wherein: the precast concrete upper chord members in the superposed beam members are flat bars, the steel pipe web members are arranged in two rows, and the two rows of steel pipe web members are arranged in parallel at intervals.

6. The composite beam of claim 1, wherein: the superposed beam members are triangular, two rows of steel pipe web members are arranged, and the two rows of steel pipe web members and the precast concrete upper chord members form the triangular superposed beam members.

7. The composite beam of claim 1, wherein: the peaks and the troughs of the steel pipe web members are flat.

8. The composite beam of claim 1, wherein: the thickness of the precast concrete base plate is smaller than half of the height of the superposed beam.

9. A composite floor slab comprising a composite floor slab, a structural layer, a casting layer and a composite beam according to any one of claims 1 to 7; the laminated bottom plate is arranged on the side part of the laminated beam, the structural layer is arranged on the laminated bottom plate and positioned on the side part of the laminated beam member, and the pouring layer is used for pouring the laminated beam member of the laminated beam and is integrated with the structural layer.

10. A composite floor slab as claimed in claim 9, wherein: the composite beam structure comprises a precast concrete base plate, and is characterized by further comprising a pouring template, wherein the pouring template is vertically arranged on the precast concrete base plate and positioned on two sides of the composite beam member, and the composite base plate is arranged on the pouring template.