CN218814693U - Truss and laminated slab comprising same - Google Patents

Abstract

The utility model discloses a truss, which comprises at least two truss units which have the same length direction and are spliced and connected, wherein each truss unit comprises an upper chord strip and two lower chord strips, the end parts of the upper chord strip are flush, and the upper chord strip and the two lower chord strips extend along the direction parallel to the distribution direction of the truss units; at least one of the upper chord strip and the two lower chord strips is a hollow tube; the hollow pipes of two adjacent truss units are spliced and matched. The utility model also discloses a superimposed sheet. The truss and the laminated slab comprising the truss are connected in sequence by adopting at least two truss units to form the truss with adjustable length, the length of the truss can be adjusted conveniently according to production needs, the application range is expanded, moreover, at least one of the upper chord and the two lower chord in the truss units is a hollow pipe, the contact area with concrete is increased when the concrete is poured, and the strength of a connecting structure with the concrete is improved.

Description

Truss and laminated slab comprising same

Technical Field

The utility model belongs to the technical field of the building technique and specifically relates to a superimposed sheet of truss and containing truss is related to.

Background

The superimposed sheet is by exempting from to tear open the panel that template and steel bar truss combination formed, has good wholeness and continuity, the wholeness is good and the shock resistance is good, both can save the template, can guarantee the level and smooth of face again, more do benefit to the finish coat and decorate, in addition, the superimposed sheet need not the formwork when the construction, efficient, the manual work has been saved effectively, building material's consumption has also been practiced thrift simultaneously to have fire prevention insulating, dampproofing and waterproofing, anticorrosive mothproof, characteristics such as weatherability fabulous.

In the prior art, the steel bar trusses on the laminated slab mainly use steel bars as upper chords, lower chords and web members and are formed by connecting the steel bars through resistance spot welding, because the lengths of the steel bars are fixed, the lengths of the steel bar trusses are fixed and are only suitable for prefabricating the laminated slab with a specific length, but the lengths of the laminated slabs with different types are inconsistent, when the laminated slabs with different lengths are produced, the steel bar trusses with the same lengths are required to be used, namely the steel bar trusses are difficult to adjust the lengths of the laminated slabs to be consistent with the prefabricated laminated slabs according to the lengths of the prefabricated laminated slabs, and the application range is single and limited; moreover, in the existing steel bar truss, the upper chord steel bar and the lower chord steel bar are both in a solid steel bar shape, and the peripheral outer edge area of the upper chord steel bar and the lower chord steel bar is limited, so that the contact area of the concrete and the steel bar truss is limited when the laminated slab is cast and produced, and the bonding strength of the concrete and the steel bars still has a space for further improving.

Therefore, there is a need for improvements to the prior art trusses.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a convenient sizing adjustment and increase with concrete bonding strength's truss and contain the superimposed sheet of truss.

In order to solve the technical problem, the utility model discloses a truss, including at least two truss units that length direction is unanimous and the concatenation is connected, truss unit includes tip flush and along the last quarter and two lower chords that extend parallel to its distribution direction, last quarter set up in two between the lower chord directly over, and all through web chord fixed connection between last quarter and two the lower chord; at least one of the upper chord and the two lower chord is a hollow pipe; the hollow pipes of two adjacent truss units are spliced and matched.

Preferably, in order to realize the connection of the hollow pipes of the two adjacent truss units, the inner sides of the hollow pipes of the two adjacent truss units are provided with inserting strips which are inserted and matched with the hollow pipes.

Preferably, in order to realize the connection of the hollow pipes of the two adjacent truss units, the hollow pipes of the two adjacent truss units are sleeved with the inserting pipes which are inserted and matched with the hollow pipes.

Preferably, in order to ensure the compactness of the truss structure, two ends of the insertion pipe are respectively abutted against the web chord of two adjacent truss units.

Preferably, in order to reinforce the connection between two adjacent truss units, the upper chord and the two lower chord are both hollow tubes.

Preferably, in order to facilitate the connection between two adjacent truss units, the distance between the upper chord axis and the two lower chord axes is equal.

Preferably, in order to facilitate the concrete to enter the inner side of the hollow pipe during the concrete pouring and reinforce the connection strength, through holes communicated with the pipe cavity of the hollow pipe are formed in the circumferential side wall of the hollow pipe.

Preferably, in order to further facilitate the pouring process, the concrete enters the inner side of the hollow pipe to reinforce the connection strength of the concrete formed by curing, and the through holes are distributed at intervals along the axial direction of the hollow pipe.

Preferably, in order to further reinforce the connection strength with the cured concrete, the through holes are densely distributed on the inner wall of the hollow pipe.

For solving the technical problem, the utility model also discloses a superimposed sheet, including the prefabricated layer, be provided with in the above-mentioned arbitrary technical scheme on the prefabricated layer the truss, the last chord of truss set up in directly over the prefabricated layer, the lower chord of truss set up in the prefabricated layer.

To sum up, the utility model discloses truss and superimposed sheet that contains the truss compare with prior art, adopt two at least truss units to connect gradually and form the truss with adjustable length, conveniently adjust truss length according to production needs, enlarge application scope, moreover, have at least one in last chord strip and two lower chord strips in the truss unit to be the hollow tube, increased when concreting with the area of contact of concrete, improved the connection structure intensity with the concrete.

Drawings

FIG. 1 is a schematic structural view of a truss according to example 1;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic structural view of a truss unit of embodiment 1;

FIG. 4 is a schematic structural view of a composite slab including the truss of example 1;

FIG. 5 is a schematic structural view of a truss according to embodiment 2;

FIG. 6 is an exploded schematic view of FIG. 5;

fig. 7 is a schematic structural view of a composite slab including the truss according to the embodiment 2;

FIG. 8 is a schematic view of the structure of the girder of embodiment 3;

FIG. 9 is an exploded schematic view of FIG. 8;

FIG. 10 is a schematic structural view of a truss unit according to embodiment 3;

FIG. 11 is a schematic view of a construction of a composite slab including a truss according to example 3;

in the figure: 100. 200 parts of upper chord strip, 300 parts of lower chord strip, 300 parts of web chord strip, 400 parts of inserting strip, 500 parts of inserting pipe, 600 parts of through hole, 700 parts of prefabricated layer and 800 parts of nut.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

As shown in fig. 1 to 3, the truss of embodiment 1 includes four truss units which are identical in length direction and are connected in a splicing manner, each truss unit includes an upper chord 100 and two lower chords 200 which extend in parallel to the distribution direction of the truss unit, the upper chord 100 is arranged right above the space between the two lower chords 200, the distance between the axial line of the upper chord 100 and the axial line of the two lower chords 200 is equal, and the upper chord 100 and the two lower chords 200 are fixedly connected through a web chord 300 which is in a corrugated shape; the web chord 300 is a bent steel bar, the upper chord 100 and the two lower chord 200 are hollow pipes, two ends of the web chord 300 are flush with two ends of the upper chord 100, two ends of the lower chord 200 are flush, the outer diameters of the upper chord 100 and the two lower chord 200 are larger than the outer diameter of the steel bar, and the upper chord 100 and the lower chord 200 of two adjacent truss units are in splicing fit.

In the truss of the embodiment, the truss units are spliced and connected with each other, the upper chord strips 100 and the lower chord strips 200 of the two adjacent truss units are matched in an inserting manner, so that the detachable connection of the two adjacent truss units is conveniently realized, the number of the truss units forming the truss is adjusted, the overall length of the truss can be adjusted by changing the number of the truss units, the length of the truss and the length of a composite slab keep a corresponding matching relationship, the size of the truss is conveniently adjusted according to the length of the composite slab, the production requirement of the composite slab is met, the outer diameters of the upper chord strips 100 and the lower chord strips 200 are larger than the outer diameter of a steel bar, the contact areas of the upper chord strips 100 and the lower chord strips 200 with poured concrete are increased in the production process, and the connection strength of the truss and a fixed and formed concrete layer is strengthened.

In order to facilitate the insertion and matching between the hollow pipes in the adjacent truss units, the truss of the embodiment further includes three insertion strips 400, which are respectively in one-to-one correspondence with the upper chord 100 and the two lower chord 200 of the truss unit and are in insertion and matching, the three insertion strips 400 penetrate through the inner sides of the upper chord 100 and the two lower chord 200 of the four truss units, the circumferential outer edges of the end parts of the three insertion strips 400 are respectively provided with a threaded structure and are in threaded matching with nuts 800, and the hollow pipes of the four truss units are clamped between the nuts 800 at the two ends of the same insertion strip 400.

After the structure is adopted, when the four truss units are connected, the axial leads of the upper chords 100 of the four truss units are coincident, the axial leads of the two lower chords 200 are coincident, then the three insertion strips 400 respectively penetrate through the inner sides of the upper chords 100 and the two lower chords 200, so that after the two ends of the insertion strips 400 are positioned outside the hollow tubes of the four truss units, the nuts 800 are screwed into the two ends of the insertion strips 400, the two nuts 800 are close to each other, and finally the hollow tubes of the four truss units are clamped between the two nuts 800, so that the truss shown in fig. 1 is formed.

The distance between the axis of the upper chord 100 and the axis of the two lower chords 200 is equal. When the two truss units are connected, any two ends of the two truss units can be connected through the inserting strips 400, so that the axial lines of the upper chord 100 in the two truss units are overlapped, and the axial lines of the lower chord 200 in the two truss units are overlapped.

As shown in fig. 4, the composite slab according to this embodiment includes a prefabricated layer 700, two trusses according to this embodiment are disposed on the prefabricated layer 700, and are distributed side by side, an upper chord 100 of each truss is disposed directly above the prefabricated layer 700, and a lower chord 200 of each truss is disposed in the prefabricated layer 700.

In the composite slab, the lower chord 200 is arranged in the prefabricated layer 700, the prefabricated layer 700 is formed by solidifying poured concrete, the solidified concrete is contacted with the circumferential inner wall and the circumferential outer edge of the lower chord 200, the combination area is increased, and the connection structure strength of the truss and the prefabricated layer 700 is further reinforced, furthermore, after the concrete is poured again above the formed prefabricated layer 700, the concrete is contacted with the hollow tubular upper chord 200, the contact area of the formed concrete and the upper chord 200 can be further increased, the binding force is enhanced, and the connection strength of the composite slab and the concrete is further reinforced. It should be noted that the number of trusses may also be adjusted according to the width of the prefabricated layer 700.

Example 2

As shown in fig. 5 and fig. 6, the truss of embodiment 2 is based on embodiment 1, and the difference is that the hollow tube of two adjacent truss units is sleeved with an insertion tube 500 which is inserted and matched with the hollow tube, and both ends of the tea connection tube 500 are respectively abutted with the web chord 300 of two adjacent truss units.

After the truss adopts the structure, the hollow pipes (including the upper chord 100 and the two lower chord 200) of the two adjacent truss units are connected by the inserting pipes 500, so that the rapid inserting connection between the adjacent truss units is realized, the number of the truss units in the truss is convenient to adjust, and the total length of the truss is adjusted according to the actual production requirement of the laminated slab. The two ends of the splicing pipe 500 are respectively abutted to the web chord strips 300 of the two adjacent truss units, so that the splicing pipe 500 is prevented from sliding and deviating along the axial direction of the hollow pipe after splicing.

Compared with the embodiment that the hollow pipes of the four truss units are penetrated through by the inserting strip 400, the length of the inserting pipe 500 in the embodiment is smaller than that of the inserting strip 400, so that the material is saved, and the inserting pipe 500 with shorter length is more convenient to carry and install.

As shown in fig. 7, the composite slab using this embodiment includes a prefabricated layer 700, two trusses of this embodiment are disposed on the prefabricated layer 700 side by side, the upper chord 100 of the truss is disposed right above the prefabricated layer 700, and the lower chord 200 of the truss is disposed in the prefabricated layer 700.

In the composite slab, the contact area between the lower chord 200 and the prefabricated layer 700 is increased through the hollow tubular lower chord, so that the connection strength between the prefabricated layer 700 and the truss is reinforced, and after concrete is poured on the upper surface of the prefabricated layer 700, the contact area between the upper chord 100 and the solidified and molded concrete is increased through the hollow tubular upper chord, so that the connection strength is further reinforced.

Example 3

As shown in fig. 8 to 10, the truss of the embodiment 3 is different from the truss of the embodiment 2 in that through holes 600 communicating with the pipe cavity of the hollow pipe (including the upper chord 100 and the two lower chords 200) are densely distributed on the circumferential side wall of the hollow pipe; the circumferential side wall of the insertion tube 500 is provided with a strip-shaped hole communicated with the tube cavity.

In this embodiment, through the through holes 600 formed in the side walls of the upper chord 100 and the two lower chord 200 and the strip-shaped holes formed in the splicing pipe 500, during the process of pouring concrete to form the prefabricated layer 700, the concrete enters and fills the inner sides of the upper chord 100 and the two lower chord 200 through the strip-shaped holes and the through holes 600, so that the cured concrete can be firmly connected with the upper chord 100 and the two lower chord 200, and the connection strength is enhanced.

As shown in fig. 11, the composite slab according to this embodiment includes a prefabricated layer 700, two trusses according to this embodiment are disposed on the prefabricated layer 700, and are distributed side by side, an upper chord 100 of each truss is disposed directly above the prefabricated layer 700, and a lower chord 200 of each truss is disposed in the prefabricated layer 700.

In the prefabricated layer 700 of the composite slab, the lower chord 200 is firmly connected with the concrete forming the prefabricated layer 700, the structural strength of the composite slab is enhanced, and in field construction, after the concrete is poured on the top surface of the prefabricated layer 700, the concrete can conveniently enter and fill the inner cavity of the upper chord 100 through the strip-shaped openings and the through holes 600, so that the contact area with the upper chord 100 is increased, the connection strength with the upper chord 100 is strengthened, and the connection strength between the solidified concrete and the prefabricated layer 700 is strengthened.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and embellishments can be made without departing from the technical principle of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.

Claims (10)

1. A truss characterized by:

the truss structure comprises at least two truss units which are consistent in length direction and spliced, wherein each truss unit comprises an upper chord (100) and two lower chords (200), the ends of the upper chord (100) are flush, and the upper chord (100) extends in a direction parallel to the distribution direction of the upper chord, the two lower chords (200) are arranged right above the upper chord, and the upper chord (100) and the two lower chords (200) are fixedly connected through a web chord (300); at least one of the upper chord (100) and the two lower chord (200) is a hollow tube; the hollow pipes of two adjacent truss units are spliced and matched.

2. The truss of claim 1, wherein: the inner sides of the hollow pipes of two adjacent truss units are provided with inserting strips (400) which are inserted and matched with the hollow pipes.

3. The truss of claim 1, wherein: the hollow pipe of two adjacent truss units is sleeved with a plug pipe (500) which is in plug fit with the hollow pipe.

4. The truss of claim 3 wherein: and two ends of the insertion pipe (500) are respectively abutted with the web chord strips (300) of the two adjacent truss units.

5. The truss of claim 1, wherein: the upper chord (100) and the two lower chord (200) are hollow tubes.

6. The truss of claim 1 wherein: the distance between the axial lead of the upper chord (100) and the axial leads of the two lower chord (200) is equal.

7. The truss of claim 1 wherein: the circumferential side wall of the hollow pipe is provided with a through hole (600) communicated with the pipe cavity of the hollow pipe.

8. The truss of claim 7 wherein: the through holes (600) are distributed at intervals along the axial direction of the hollow pipe.

9. The truss of claim 8 wherein: the through holes (600) are densely distributed on the inner wall of the hollow pipe.

10. A laminated slab, characterized in that: comprising a prefabricated layer (700), a truss according to any one of claims 1-9 being arranged on the prefabricated layer (700), an upper chord (100) of the truss being arranged directly above the prefabricated layer (700), and a lower chord (200) of the truss being arranged within the prefabricated layer (700).

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