CN115637806A - Steel-concrete composite beam-slab integrated unit for high-performance grain storage and its installation method - Google Patents

Abstract

The invention relates to a steel-concrete combined beam-slab integrated unit for a high-performance grain depot and an installation method thereof, wherein the combined beam-slab integrated unit comprises a concrete precast slab, a section steel beam and connecting steel bars; connecting reinforcing steel bars are connected between the section steel beams and the concrete precast slabs so that the section steel beams, the section steel beams and the concrete precast slabs are connected to form a combined beam-slab integrated unit with a groove-shaped cross section; both ends of the section steel beam are provided with extension parts. The installation method comprises the following steps: s1, arranging steel corbels on a roof girder or a truss; s2, hoisting the combined beam-slab integrated unit; placing the extension part on a steel bracket and fixing; s3: installing and hoisting the other combined beam-slab integrated units according to the S2 mode, and fixedly connecting the adjacent combined beam-slab integrated units; s4: and pouring surface layer concrete on the concrete precast slab. The invention has the beneficial effects that: the combined beam-slab integrated unit realizes the support-free and mould-free construction of the roof concrete structure on site, can obviously accelerate the construction speed and reduce the site construction cost.

Description

Steel-concrete composite beam-slab integrated unit and its installation for high-performance grain storage method

technical field

The invention relates to the technical field of construction, in particular to a steel-concrete composite beam-slab integrated unit for a high-performance grain depot and an installation method thereof.

Background technique

Food security is an important part of national security and an important foundation for economic development, social stability and national security. The construction of high-standard granaries puts forward higher requirements on the thermal insulation performance and airtight performance of grain factories.

At present, the span of grain bungalows is generally required to be greater than 18m, and the cornice height of houses is generally required to be greater than 10m. In order to improve the thermal insulation performance of the roof, a naturally ventilated roof with double-layer roof panels is currently a common form. In order to ensure the airtightness of the roof, the lower roof panel usually adopts the cast-in-place concrete process. In this way, it is necessary to set up tall supports and lay formwork on site. The support system is complicated, expensive and dangerous. The bottom surface of the lower roof is flat, which is beneficial to the daily maintenance of the grain depot. Therefore, the main and secondary beams of the floor need to be turned up, which brings difficulties to the formwork of the concrete components.

Contents of the invention

The object of the present invention is to provide a steel-concrete composite beam-slab integrated unit for a high-performance grain depot and an installation method thereof, which can improve construction speed and quality and reduce construction cost.

The present invention is realized through the following technical solutions: a steel-concrete composite beam-slab integrated unit for a high-performance grain depot, which includes

Concrete prefabricated slab 2 is a reinforced concrete slab with built-in two-way steel mesh sheet 2-2;

Shaped steel beams 1 are respectively set on the shaped steel above the front side and the rear side of the top of the prefabricated concrete slab 2, and extend left and right;

A plurality of connecting steel bars 3 are annular and distributed on the bottom surface of the shaped steel beam 1 at intervals along the extending direction of the shaped steel beam 1;

Wherein, the connecting steel bar 3 is connected between the shaped steel beam 1 and the precast concrete slab 2, so that the connecting steel bar 3, the shaped steel beam 1 and the concrete precast slab 2 are connected to form a combined beam-slab integrated unit 6 with a groove-shaped cross section;

Both ends of the shaped steel beam 1 are provided with extensions.

A method for installing a steel-concrete composite beam-slab integrated unit for a high-performance grain depot, which includes the following steps:

S1: Steel corbels 5 are arranged on the lower side of the roof girder or truss 4;

S2: hoisting the combined beam-slab integrated unit 6; placing the extension on the top surface of the steel corbel 5 and fixing it by welding;

S3: install and hoist the remaining composite beam-slab integrated units 6 according to the method in step 2, and weld the trim plate 7 between adjacent composite beam-slab integrated units 6 for fixing;

S4: Pouring surface concrete on the prefabricated concrete slab.

Compared with the previous technology, the beneficial effects of the present invention are:

1. The composite beam-slab integrated unit described in the present invention can realize strut-free and formwork-free roof concrete structure on-site construction, can significantly speed up construction, and reduce on-site construction costs.

2. The bottom surface of the composite beam-slab integrated unit is flat, and there are no ribs on the side of the slab, which reduces the mold opening cost of precast concrete components and can significantly reduce the prefabrication cost.

3. After the construction is completed, the bottom surface of the substructure of the grain depot roof is flat, which meets the requirements of process design; it can achieve the same airtight performance as cast-in-place concrete.

Description of drawings

Fig. 1 is the structural representation of the composite beam-slab integrated unit of the present invention;

Fig. 2 is the side view of the composite beam-slab integrated unit of the present invention;

Fig. 3 is the structural representation of shaped steel beam of the present invention;

Fig. 4 is the structural representation of the type concrete prefabricated panel of the present invention;

The first step of Fig. 5 installation steps of the present invention;

The second step of Fig. 6 installation step of the present invention;

The third step of Fig. 7 installation steps of the present invention;

Fig. 8 is the fourth step of the installation steps of the present invention.

Description of labels: 1 type steel beam, 1-1 end plate, 1-2 extended section steel, 2 concrete prefabricated plate, 2-1 truss reinforcement, 2-2 two-way reinforcement mesh, 3 connection reinforcement, 4 truss, 5 steel cow Legs, 6 composite beam-slab integrated units, 7 patch panels.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing description:

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by "front", "rear", "left", "right", "top", "bottom" etc. are based on the orientations or positional relationships shown in the drawings The positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

As shown in Figure 1-4: the steel-concrete composite beam-slab integrated unit for high-performance grain storage, which includes a concrete prefabricated slab 2, which is a reinforced concrete slab with built-in two-way steel mesh 2-2;

Shaped steel beams 1 are respectively set on the shaped steel above the front side and the rear side of the top of the prefabricated concrete slab 2, and extend left and right;

A plurality of connecting steel bars 3 are annular and distributed on the bottom surface of the shaped steel beam 1 at intervals along the extending direction of the shaped steel beam 1;

Wherein, the connecting steel bar 3 is connected between the shaped steel beam 1 and the precast concrete slab 2, so that the connecting steel bar 3, the shaped steel beam 1 and the concrete precast slab 2 are connected to form a combined beam-slab integrated unit 6 with a groove-shaped cross section;

Both ends of the shaped steel beam 1 are provided with extensions.

Here, the long axis direction of the composite beam-slab integrated unit 6 is consistent with the crossing direction; the connecting steel bar 3 is connected between the shaped steel beam 1 and the concrete precast slab 2, which will make the bottom surface of the shaped steel beam 1 higher than the concrete precast slab 2 top surface.

The upper edge of the connecting steel bar 3 is fixedly connected to the bottom surface of the shaped steel beam 1, and the lower side of the connecting steel bar 3 is anchored into the concrete prefabricated slab 2

The top surface of the extension part is flush with the top surface of the shaped steel beam 1 , and the bottom surface of the extended part is higher than the bottom surface of the shaped steel beam 1 .

The extension part includes an end plate 1-1 and an extended steel 1-2, the end plate 1-1 is connected to the end of the steel beam 1, and the extended steel 1-2 is connected to the end plate 1-1;

The top surface of the overhanging shaped steel 1-2 is flush with the top surface of the shaped steel beam 1, and the bottom surface of the overhanging shaped steel is higher than the bottom surface of the shaped steel beam 1.

The top surface of the prefabricated concrete slab 2 is a rough surface.

A plurality of truss reinforcements 2-1 are arranged in an array on the top surface of the prefabricated concrete slab 2, and the truss reinforcements 2-1 are perpendicular to the shaped steel beam 1. The truss reinforcement 2-1 here can be laid out in an array according to the force requirements.

As shown in Figure 5-8: a method for installing a steel-concrete composite beam-slab integrated unit for a high-performance grain depot, characterized in that it includes the following steps:

S1: Steel corbels 5 are arranged on the lower side of the roof girder or truss 4;

S2: hoisting the combined beam-slab integrated unit 6; placing the extension on the top surface of the steel corbel 5 and fixing it by welding;

S3: install and hoist the remaining composite beam-slab integrated units 6 according to the method of S2, and weld the trim plate 7 between adjacent composite beam-slab integrated units 6 for fixing;

S4: Pouring surface concrete on the prefabricated concrete slab.

In S3, the panel 7 is welded to the steel beams 1 of two adjacent composite beam-slab integrated units 6 .

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (8)

1. Steel-concrete composite beam-slab integrated unit for high-performance grain storage, which includes The concrete prefabricated slab (2) is a reinforced concrete slab with a built-in two-way steel mesh sheet (2-2); shaped steel beams (1), which are respectively arranged on the shaped steel above the front side and the rear side of the top of the prefabricated concrete slab (2), and extend left and right; A plurality of connecting steel bars (3) are annular and distributed on the bottom surface of the shaped steel beam (1) at intervals along the extending direction of the shaped steel beam (1); Among them, the connecting steel bar (3) is connected between the shaped steel beam (1) and the concrete prefabricated slab (2), so that the connecting steel bar (3), shaped steel beam (1) and concrete precast slab (2) are connected to form a cross section of Grooved composite beam-slab integrated unit (6); Both ends of the shaped steel beam (1) are provided with extensions. 2. The steel-concrete composite beam-slab integrated unit for high-performance grain storage according to claim 1, characterized in that: the upper edge of the connecting steel bar (3) is fixed to the bottom surface of the steel beam (1) To connect, the lower side of the connecting steel bar (3) is anchored in the concrete prefabricated slab (2). 3. The steel-concrete composite beam-slab integrated unit for high-performance grain storage according to claim 1, characterized in that: the top surface of the extension part is flush with the top surface of the profiled steel beam (1), extending The bottom surface of the portion is higher than the bottom surface of the shaped steel beam (1). 4. The steel-concrete composite beam-slab integrated unit for high-performance grain storage according to claim 3, characterized in that: the extension part includes an end plate (1-1) and an overhanging section steel (1-2 ), the end plate (1-1) is connected to the end of the shaped steel beam (1), and the extended shaped steel (1-2) is connected with the end plate (1-1); The top surface of the overhanging shaped steel (1-2) is flush with the top surface of the shaped steel beam (1), and the bottom surface of the overhanging shaped steel is higher than the bottom surface of the shaped steel beam (1). 5. The steel-concrete composite beam-slab integrated unit for high-performance grain storage according to claim 1, characterized in that: the top surface of the prefabricated concrete slab (2) is a rough surface. 6. The steel-concrete composite beam-slab integrated unit for high-performance grain storage according to claim 1, characterized in that: the top surface array of the prefabricated concrete slab (2) is provided with a plurality of truss bars (2-1 ), the truss reinforcement (2-1) is perpendicular to the steel beam (1). 7. A method for installing a steel-concrete composite beam-slab integrated unit for a high-performance grain depot according to any one of claims 1-6, characterized in that: it comprises the following steps: S1: Steel corbels (5) are arranged on the lower side of the roof girder or truss (4); S2: hoisting the composite beam-slab integrated unit (6); placing the extension on the top surface of the steel corbel (5) and fixing it by welding; S3: install and hoist the remaining composite beam-slab integrated units (6) according to the method of S2, and weld the trim plate (7) between adjacent composite beam-slab integrated units (6) for fixing; S4: Pouring surface concrete on the prefabricated concrete slab. 8. The installation method according to claim 7, characterized in that: the panel (7) is welded to the steel beams (1) of two adjacent composite beam-slab integrated units (6).

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