Roof-out precast beam

Abstract

The utility model discloses an out-of-roof precast beam, and relates to the technical field of building construction. Comprising a steel beam body and an outer covering beam plate, the steel beam body comprises an inner supporting structure and a plurality of steel bars arranged on the outer side of the inner supporting structure in a surrounding mode, and each steel bar is fixedly connected with the inner supporting structure; the multiple outer covering beam plates are arranged on the outer sides of the steel bars in a covering mode. And the steel beam main body is combined with the outer covering beam plate to form a roof beam by fixing at least one end of the steel bar on a building wall body and suspending the steel beam main body towards the outside of a building. According to the out-of-roof prefabricated beam provided by the utility model, the components of the prefabricated beam are manufactured in advance in a prefabricated mode, constructors only need to assemble out the out-of-roof beam of the corresponding size on a construction site and complete installation of the out-of-roof beam in a building, construction on the outer side of the building is not needed, and the operation is simple and safe.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a precast beam protruding from the roof. Background Art

[0002] When constructing a beam protruding from the roof, the prior art is to directly build a construction platform on the outside of the top floor of the building and then cast the beam protruding from the roof on site. The beam protruding from the roof is usually suspended alone outside the roof, making it impossible for construction workers to directly build a construction platform for the beam protruding from the roof as they do on the building facade. Instead, a cantilever form is adopted, that is, first an I-beam cantilever is erected, then a steel pipe load-bearing frame and an outer fireproof frame are erected, and a fixed form of pulling from above and bracing from below is also required. The entire erection process is cumbersome and the construction cost is relatively high. Content of the Utility Model

[0003] The utility model provides a precast beam protruding from the roof. The components of the precast beam are manufactured in advance in a precast manner. Construction workers only need to assemble a precast beam of corresponding size at the construction site and complete the installation of the precast beam protruding from the roof during construction inside the building, without the need for construction outside the building. The operation is simple and safe, so as to solve the above technical problems.

[0004] The technical solution of the utility model to solve the above problems is: to provide a precast beam protruding from the roof, including a steel beam main body and an outer covering beam plate. The steel beam main body includes an inner bracing structure and multiple steel bars arranged around the outside of the inner bracing structure. Each steel bar is fixedly connected to the inner bracing structure; there are multiple outer covering beam plates, and the multiple outer covering beam plates are all covered outside the steel bars; the steel beam main body forms a beam protruding from the roof in combination with the outer covering beam plate by fixing at least one end of the steel bar to the building wall and making itself cantilever outside the building.

[0005] Further, the inner bracing structure includes multiple inner bracing steel plates, and each steel bar is welded to multiple inner bracing steel plates at the same time.

[0006] Further, the inner bracing steel plate is a regular polygon steel plate, and a structural cavity is provided on the inner bracing steel plate.

[0007] Further, one side of the outer covering beam plate is provided with a receiving groove for receiving a part of the steel bar body.

[0008] Further, on the side of the outer covering beam plate provided with a clamping groove, a precast structural steel bar for inserting between multiple steel bars in the steel beam main body is integrally provided.

[0009] Further, adjacent outer covering beam plates are also spliced and connected to each other.

[0010] Further, along the extending direction of the steel bars, a splicing convex body is provided on one side of the outer covering beam slab, and a splicing groove is provided on the other side; along the direction surrounding the main body of the steel beam, adjacent outer covering beam slabs are spliced and connected to each other through the splicing convex body and the splicing groove.

[0011] Further, the splicing convex body is a T-shaped limiting block, and the splicing groove is a T-shaped limiting groove. The splicing convex body and the splicing groove cooperate with each other to limit and connect adjacent outer covering beam slabs.

[0012] Further, the outer covering beam slab is a precast cement board.

[0013] Further, a plurality of air holes are also formed in the outer covering beam slab.

[0014] Advantages of the utility model:

[0015] For a precast beam out of the roof of the utility model, technicians can correspondingly precast steel bars, internal bracing structures and outer covering beam slabs with corresponding lengths according to the design dimensions of the beam out of the roof, and then directly assemble these precast components into a precast beam with corresponding dimensions at the top of the building. And directly weld the steel bars at both ends of the assembled precast beam on the roof to the corresponding steel structures on the building wall and further pour and fix them, then the installation of the precast beam can be completed. The operation is convenient, simple and safe, and the construction cost is relatively low.

[0016] In addition, an internal bracing structure is arranged in the enclosed area of a plurality of steel bars, so that the structural strength of the whole main body of the steel beam is greatly improved, so as to ensure that the main body of the steel beam can bear the weight of a plurality of outer covering beam slabs without deformation, and ensure the construction quality of the beam out of the roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the utility model and, together with the description, are used to explain the principles of the utility model. In these drawings, like reference numerals are used to represent like elements. The drawings in the following description are some embodiments of the utility model, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic diagram of the overall structure of the precast beam out of the roof of this embodiment;

[0019] Figure 2 is a schematic diagram of the structure of the main body of the steel beam of this embodiment;

[0020] Figure 3 is a schematic diagram of the structure of the internal bracing steel plate of this embodiment;

[0021] Figure 4 is a schematic diagram of the structure of the outer covering beam slab of this embodiment;

[0022] 1 - Steel beam main body, 11 - Inner support steel plate, 12 - Steel bar, 13 - Structural cavity, 2 - Outer covering beam and slab, 21 - Accommodating groove, 22 - Prefabricated structural reinforcement, 23 - Splicing convex body, 24 - Splicing groove, 25 - Air hole. Specific implementation manner

[0023] In this specification, the orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structures shown in the respective drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. They are relative concepts and may therefore change accordingly depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0024] Please refer to Figure 1 and Figure 2 As shown in, a precast beam emerging from the roof in a specific embodiment of the present utility model includes a steel beam main body 1 and an outer covering beam and slab 2. The steel beam main body 1 includes an inner support structure and four steel bars 12. The inner support structure includes four inner support steel plates 11, and the four inner support steel plates 11 are arranged at equal intervals in a straight line direction. The four steel bars 12 are respectively arranged around each inner support steel plate 11 from the four directions of up, down, front, and back, and each steel bar 12 is welded and fixed to the four inner support steel plates 11. There are sixteen outer covering beam and slabs 2, and every four outer covering beam and slabs 2 that surround the steel beam main body 1 from the four directions of up, down, front, and back are taken as a group. The four groups of outer covering beam and slabs 2 are sequentially abutted along the extending direction of the steel bars 12 to completely cover the outside of the steel beam main body 1, so as to form a beam emerging from the roof in combination with the steel beam main body 1.

[0025] It should be noted that: in other embodiments, the number of inner support steel plates 11 is not limited to four, the number of steel bars 12 is not limited to four, and the number of outer covering beam and slabs 2 is not limited to sixteen. The specific number of inner support steel plates 11 and / or steel bars 12 and / or outer covering beam and slabs 2 used can be selected by the construction personnel according to the actual situation. Moreover, in other embodiments, the inner support steel plate 11 can also be a triangular plate or a pentagonal plate or other polygonal plate bodies.

[0026] Further, in this embodiment, on each of the upper and lower sides of each outer covering beam plate 2 in the horizontal direction, one side is provided with a T-shaped splicing convex body 23, and the other side is provided with a T-shaped splicing groove 24. Adjacent outer covering beam plates 2 are spliced and connected to each other by means of side-sliding on the opposite sides, and they are also limited to each other to ensure that the four outer covering beam plates 2 can be stably enclosed and arranged outside the steel beam main body 1 without falling off easily. Moreover, the inner support steel plate 11 is a square plate, grooves are provided in the middle of the four sides of the inner support steel plate 11, and arc grooves for accommodating part of the body of the steel bar 12 are also provided in the grooves. A receiving groove 21 for accommodating the steel bar 12 is also provided in the middle of one side of the outer covering beam plate 2. The arc groove and the receiving groove 21 can be combined with each other to form a circular through hole that can exactly accommodate the steel bar 12. So that when the steel bar 12 is welded and installed in the arc groove of the inner support steel plate 11 and then the outer covering beam plate 2 is covered on the steel bar 12, the outer covering beam plate 2 can also abut against the side of the inner support steel plate 11, and the inner support steel plate 11 in turn will support the outer covering beam plate 2 to prevent the outer covering beam plate 2 from shaking, avoiding damage to the splicing structure between the spliced outer covering beam plates 2 due to the shaking of the outer covering beam plate 2.

[0027] It should be noted that, in this embodiment, the outer covering beam plate 2 is a precast cement plate.

[0028] In addition, the specific construction and installation method of the precast beam out of the roof in this embodiment is as follows:

[0029] Step 1: Pre-manufacture the steel bar 12, the inner support steel plate 11 with corresponding dimensions, and the outer covering beam plate 2 with corresponding dimensions according to the design drawings;

[0030] Step 2: Inside the building or on the ground, weld and assemble the steel bar 12 and the inner support steel plate 11 into the steel beam main body 1, and then cover and splice and assemble the outer covering beam plate 2 to the outside of the steel beam main body 1. Regard the outer covering beam plate 2 as a "formwork" and fix it on the outside of the steel beam main body 1 to form a precast beam frame structure;

[0031] Step 3: Inject concrete into the internal cavity of the precast beam skeleton structure to make the concrete fill the entire inner cavity of the precast beam skeleton, and wait for the concrete to solidify and take shape to form a complete precast beam;

[0032] Step 4: Use a tower crane to lift the formed precast beam to the construction position on the top floor of the building, and lap and place the two ends of the precast beam on the corresponding horn positions. Weld and fix the steel bars 12 exposed at the two ends of the precast beam to the steel structure at the horn positions, and further pour and fix the two ends of the precast beam to the building itself with concrete; until the concrete solidifies again to complete the construction and installation of the precast beam.

[0033] It should be noted that: in the installation method of this device, after the entire precast beam out of the roof is assembled, the construction workers can further inject concrete into the beam inner cavity formed by enclosing multiple outer covering beam plates 2 to further improve the structural strength of the entire precast beam; in this regard, to improve the adhesion performance of the outer covering beam plates 2 and prevent the outer covering beam plates 2 from detaching from the main steel beam 1, two precast structural reinforcements 22 are integrally arranged perpendicular to the beam plates on one side of the outer covering beam plates 2 provided with clamping grooves, and the precast structural reinforcements 22 can be inserted into the later injected concrete; after the concrete solidifies, the outer covering beam plates 2 can be further fixed to the outside of the steel beam structure through the precast structural reinforcements 22.

[0034] Moreover, a plurality of air holes 25 are formed in the outer covering beam plates 2 to facilitate the rapid discharge of the gas in the beam inner cavity formed by enclosing multiple outer covering beam plates 2 when injecting concrete, and to accelerate the concrete injection speed; in addition, if the diameter of the air holes 25 is increased, the construction workers can also inject concrete into the precast beam through some of the air holes 25 to further accelerate the concrete injection speed; furthermore, the construction workers can also judge whether the inner cavity of the precast beam is filled with concrete by observing whether there is concrete emerging from the air holes above.

[0035] In addition, a plurality of structural cavities 13 are formed in the inner support steel plate 11. The structural cavities 13 can be used to further reduce the weight of the inner support steel plate 11 on the premise of ensuring the structural strength of the inner support steel plate 11, and then reduce the weight of the entire precast beam; moreover, when injecting concrete into the precast beam, the concrete can also flow through the structural cavities 13 to fill the entire precast beam.

[0036] For the parts not mentioned above, the prior art is applicable.

[0037] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated roof beam, characterized in that: The invention comprises a steel beam body (1) and an outer sheathing beam plate (2), wherein the steel beam body (1) comprises an inner support structure and a plurality of steel bars (12) arranged to surround the outer side of the inner support structure, and each steel bar (12) is fixedly connected to the inner support structure; a plurality of outer sheathing beam plates (2) are provided, and the plurality of outer sheathing beam plates (2) are all arranged to cover the outer side of the steel bars (12); the steel beam body (1) is formed into a roof beam by fixing at least one end of the steel bars (12) to a building wall and suspending the steel beam body to the outside of the building, thereby combining with the outer sheathing beam plate (2).

2. The prefabricated roof beam according to claim 1, characterized in that: The internal support structure comprises a plurality of internal support steel plates (11), and each steel bar (12) is simultaneously welded to the plurality of internal support steel plates (11).

3. The prefabricated roof beam according to claim 2, characterized in that: The inner supporting steel plate (11) is a regular polygonal steel plate, and a structural cavity (13) is provided on the inner supporting steel plate (11).

4. The prefabricated roof beam according to claim 1, characterized in that: A receiving groove (21) for receiving part of the main body of the steel bar (12) is provided on one side of the outer cladding beam plate (2).

5. The prefabricated roof beam according to claim 4, characterized in that: One side of the outer cladding beam plate (2) provided with the clamping groove is also integrally provided with prefabricated structural bars (22) for being inserted between a plurality of steel bars (12) in the steel beam body (1).

6. The prefabricated roof beam according to claim 1, characterized in that: Adjacent outer cladding beams (2) are also spliced ​​and connected to each other.

7. The prefabricated roof beam according to claim 6, characterized in that: Along the extension direction of the steel bars (12), one side of the outer cladding beam plate (2) is provided with a splicing protrusion (23), and the other side is provided with a splicing groove (24); along the direction surrounding the steel beam body (1), adjacent outer cladding beam plates (2) are spliced ​​and connected to each other via the splicing protrusions (23) and the splicing grooves (24).

8. The prefabricated roof beam according to claim 7, characterized in that: The splicing protrusion (23) is a T-shaped limiting block, and the splicing groove (24) is a T-shaped limiting groove. The splicing protrusion (23) and the splicing groove (24) cooperate with each other to limit and connect adjacent outer cladding beam plates (2).

9. The prefabricated roof beam according to claim 1, characterized in that: The outer cladding beam slab (2) is a prefabricated cement slab.

10. The prefabricated roof beam according to claim 1, characterized in that: The outer cladding beam plate (2) is also provided with a plurality of air holes (25).

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