CN108661225B - But height-adjusting's precast concrete coincide floor - Google Patents

But height-adjusting's precast concrete coincide floor Download PDF

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Publication number
CN108661225B
CN108661225B CN201810499370.2A CN201810499370A CN108661225B CN 108661225 B CN108661225 B CN 108661225B CN 201810499370 A CN201810499370 A CN 201810499370A CN 108661225 B CN108661225 B CN 108661225B
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China
Prior art keywords
height
floor
steel
slab
concrete
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CN201810499370.2A
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Chinese (zh)
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CN108661225A (en
Inventor
刘学春
崔付园
强申
朱涛
王小青
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Beijing University of Technology
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Beijing University of Technology
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17Floor structures partly formed in situ
    • E04B5/23Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17Floor structures partly formed in situ
    • E04B5/23Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17Floor structures partly formed in situ
    • E04B2005/176Floor structures partly formed in situ with peripheral anchors or supports

Abstract

A prefabricated concrete composite floor slab with adjustable height comprises angle steel, a soft material, a steel bar truss, an L-shaped screw rod, concrete and nuts. The concrete and the steel bar truss are cast together in a factory to form a member A1 with holes on two sides, and the slotted angle steel is placed at the bottom of the member A1 in a hole-aligned mode. The vertical rod of the on-site L-shaped screw rod penetrates through the component A1 and the hole in the angle steel and is screwed down through the nut, and the cross rod is hung on the upper surface of the beam during hoisting. After hoisting, the height of the precast slab is adjusted by adjusting the nuts on the L-shaped lead screws, the relative positions of the floor slabs and the beams are adjusted, the surface of each floor slab is ensured to be flush, and the assembly problem caused by uneven surface of the concrete member is solved. The precast slabs and the angle steels serve as bottom moulds, and gaps filled with soft materials are used for placing leaked slurry, so that the post-cast layer can be poured conveniently. The floor plate is invisible, partial beam height is increased, and the net height of a structural layer is increased. The steel bar truss in the precast slab enhances the binding power of the new and old pouring layers and improves the integrity of the laminated floor slab.

Description

But height-adjusting's precast concrete coincide floor
Technical Field
The invention belongs to the field of building structural members, and is suitable for assembly type steel structure buildings.
Background
Under the condition that the steel yield is greatly surplus every year in China, a series of policy guidelines for promoting the use of steel in building structures are carried out by the country, and the steel structure buildings are vigorously developed. The steel structure is developed rapidly by virtue of the advantages of light dead weight, good plasticity and toughness, good earthquake resistance and the like, and the produced assembled steel structure system has the advantages of high construction speed, less construction pollution, easy quality guarantee and the like, is a green building, is suitable for the development of the building industry in China, and enables the building industry in China to return to industrialization.
The precast concrete composite floor slab is an assembled integral floor slab formed by overlapping a permanent template and an upper cast-in-place layer by adopting a precast concrete thin plate (with the thickness of 5cm-8cm) at the bottom, has the advantages of good integrity, large rigidity, good crack resistance, no increase of reinforcing steel bar consumption, template saving and the like of the cast-in-place floor slab, can be constructed in a precast assembly mode to the maximum extent, represents the development direction of national building industrialization, and has the following defects in the existing precast concrete composite floor slab:
1) the superimposed floor is placed on the beam through the studs or bolts welded on the upper flange of the beam, the whole beam height is exposed outside, the net height of the structural layer is reduced, and the attractiveness is influenced.
2) The laminated floor slab is hoisted in blocks, and the surface of the floor slab is not parallel and level after hoisting is easy to occur.
The invention provides a novel precast concrete composite floor slab form aiming at the defects by combining the existing composite floor slab form. After hoisting, the height position of the precast slab is adjusted before the post-cast layer is poured, and the surface of each floor slab is ensured to be level after hoisting; the suspension effect of the L-shaped screw rod is utilized to 'hide' part of the beam height, so that the net height of the structural layer is increased, the integrity of the floor slab and the beam is enhanced, unnecessary material waste is reduced, and the spatial arrangement of the structure is more flexible and attractive; the angle steel and the precast slab are used as bottom moulds, and the soft material is used for filling the gap between the angle steel and the beam web plate, so that the formwork pouring of the post-cast layer of the laminated floor slab is facilitated; the truss-shaped steel bars in the prefabricated slabs not only enhance the bonding force of the new and old pouring layers of the laminated floor slabs and improve the shearing resistance of the floor slabs, but also facilitate pipeline burying and avoid secondary hole opening.
Disclosure of Invention
The invention provides a height-adjustable precast concrete composite floor slab, which aims to overcome the technical defects of the existing composite floor slab, improve the assembly precision of components and enlarge the application range of the components while ensuring the safety and reliability of the structure.
The technical scheme of the invention is as follows:
1. the utility model provides a but height-adjusting's precast concrete coincide floor which characterized in that: the composite floor slab comprises: the steel angle comprises angle steel 1, soft materials 2, a steel bar truss 3, an L-shaped screw rod 4, concrete 5 and a nut 6;
2. the steel bar trusses 3 are distributed at the bottom of the concrete 5 to serve as stress bars, and holes are reserved on two sides along the beam direction to form a member A1 when the concrete 5 and the steel bar trusses 3 are integrally poured;
3. a long slotted hole is formed in the position, corresponding to the component A1, of the angle steel 1, and the soft material 2 is adhered to one side of the short side of the angle steel to form a component A2;
4. the member a2 is placed on the bottom of the member a1 with the holes aligned and the vertical rod of the L-shaped lead screw 4 is threaded through the holes of the members a1 and a2 and tightened by the nut 6.
5. The member A1 is hoisted together with the member A2, the L-shaped screw rod 4 and the nut 6, and the cross bar of the L-shaped screw rod 4 is hung on the upper surface of the beam.
6. The L-shaped screw rods 4 are distributed on two connecting sides of the beam slab at equal intervals, and the cross rods of the screw rods have enough length to ensure that the floor slab can be stably hung on the two side beams during hoisting.
The soft material can be sponge, rubber and other deformable and adhesive materials.
The slotted hole provides a space for the deformation of the soft material in the vertical direction of the beam, and ensures that the soft material completely fills the gap between the short edge of the angle steel and the beam, so as to ensure that slurry does not leak when the post-cast layer branch mold is poured.
Advantageous effects
The invention discloses a height-adjustable precast concrete composite floor slab, which has the outstanding advantages that:
1) the assembly precision of the floor slabs is improved, the height of the prefabricated floor slabs can be adjusted, the height difference of each floor slab during manufacturing and hoisting is flexibly adjusted, and the lower surfaces of the floor slabs after hoisting are parallel and level.
2) And adjusting the relative position of the cast-in-place layer and the beam by adjusting the height position of the precast floor slab.
3) The L-shaped screw rod can bear the shearing force of the floor slab in the using stage.
4) The composite floor slab is hung on the beam, so that the beam height of a part of the composite floor slab is hidden, the integrity of the beam slab is enhanced, the net height of the structural layer is increased, and the structure is more flexible and attractive in arrangement.
5) The angle steel and the precast slab are used as a bottom die, and the soft material is used for filling a gap between the angle steel and the beam web, so that the pouring of a post-cast layer of the laminated floor slab is facilitated.
6) The arrangement of the steel bars in the truss form increases the bonding force of the superposed surfaces of the floor slabs and improves the overall performance of the floor slabs, particularly the shearing resistance.
Drawings
FIG. 1 is a structural component view of component A1 of the present invention;
FIG. 2 is a schematic view of a steel bar truss of the present invention;
FIG. 3 is a schematic view of the construction of component A2 of the present invention;
FIG. 4 is a schematic view of the connection of the L-shaped lead screw of the present invention to members A1 and A2;
figure 5 is a schematic overview of the composite floor slab to beam connection of the present invention;
in the figure, 1-angle steel; 2-soft material; 3-a steel bar truss; 4-L-shaped lead screw; 5-concrete; 6-nut.
Detailed Description
The following describes a specific embodiment of the height-adjustable precast concrete composite floor slab of the present invention with reference to fig. 1 to 5.
As shown in the attached drawings, the height-adjustable assembly type composite floor slab comprises angle steel 1, soft materials 2, steel bar trusses 3, L-shaped screw rods 4, concrete 5 and nuts 6.
The concrete 5 and the steel bar truss 3 jointly form a member A1, the steel bar truss 3 is arranged at the bottom of the concrete 5 and serves as a stress bar, and holes are reserved in two sides of the member A1 along the beam direction during pouring; a long slotted hole is formed in the position, corresponding to the component A1, of the long side of the angle steel 1, the soft material 2 is adhered to one side of the short side of the angle steel 1 to form a component A2, and the components A1 and A2 are processed and manufactured in a factory; before hoisting on site, the member A2 is placed on the lower part of the member A1 in a hole alignment manner; the vertical rod of the L-shaped screw rod 4 passes through the holes on the components A1 and A2 and is screwed by the nut 6; when in hoisting, the component A1, the component A2, the L-shaped lead screw and the nut are hoisted together, and the cross bar of the L-shaped lead screw 4 is hung on the upper flange of the beam.
In the construction process of the site, according to the stress and force transmission characteristics of the floor slab, the length of the cross rod of the L-shaped screw rod is long enough, the floor slab can be stably hung on the two side beams, and the subsequent formwork erection pouring of a cast-in-place layer is completed. The height position of the precast slab is determined according to the overall thickness of the composite floor slab and the relative position of the floor slab and the beam, so that the upper surface of the composite floor slab is not lower than the upper surface of the beam.
It should be noted that the above is merely illustrative of the present invention and does not limit the scope of the present invention, and the practice of the present invention is not limited thereto.

Claims (4)

1. The utility model provides a but height-adjusting's precast concrete coincide floor which characterized in that: the laminated floor slab comprises angle steel (1), a soft material (2), a steel bar truss (3), an L-shaped screw rod (4), concrete (5) and nuts (6); the steel bar trusses (3) are distributed at the bottom of the concrete precast slab and serve as stress bars, the stress bars and the concrete precast slab are poured together in a factory to form a member A1, and holes are reserved in two sides of the member A1 along the direction of the section steel beam; a groove is formed in the corresponding position of the long side of the angle steel (1) and a reserved hole of the member A1, and the soft material (2) is adhered to one side of the short side of the angle steel (1) to form a member A2; the member A2 is placed at the bottom of the member A1 in a mode of aligning holes, the vertical rod of the L-shaped screw rod (4) penetrates through the holes in the member A1 and the member A2 and is screwed at the bottom through the nut (6) and then is hoisted, and the upper surface of the beam is hung by the cross rod after hoisting; the component A2 is tightly attached to the web of the section steel beam, the height position of the floor after hoisting is adjusted through the nut on the adjusting screw rod, the flatness of the lower surface of the floor is guaranteed, the relative position of the floor and the beam is adjusted, and the upper surface of the precast slab is lower than the lower surface of the upper flange of the section steel beam.
2. The composite floor slab of claim 1, wherein: one side of the L-shaped screw rods is not less than three and is equidistantly arranged along the length direction of the beam.
3. The composite floor slab of claim 1, wherein: utilize the suspension effect of L shape lead screw, hide partial beam height, the wholeness of reinforcing floor and roof beam increases the net height of structural layer.
4. The composite floor slab of claim 1, wherein: the soft material adopts sponge or rubber.
CN201810499370.2A 2018-05-23 2018-05-23 But height-adjusting's precast concrete coincide floor Active CN108661225B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810499370.2A CN108661225B (en) 2018-05-23 2018-05-23 But height-adjusting's precast concrete coincide floor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810499370.2A CN108661225B (en) 2018-05-23 2018-05-23 But height-adjusting's precast concrete coincide floor

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CN108661225A CN108661225A (en) 2018-10-16
CN108661225B true CN108661225B (en) 2020-05-08

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112031235A (en) * 2020-09-04 2020-12-04 付成龙 Prefabricated cast-in-place concrete floor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4310007B2 (en) * 1999-08-23 2009-08-05 日工株式会社 Floor bundle
CN104088390B (en) * 2014-07-29 2016-08-24 上海圣峰建材科技有限公司 A kind of roof suspended ceiling integrated member
CN204098484U (en) * 2014-09-29 2015-01-14 内蒙古蒙西工程设计有限公司 Adjustable form bracing support body
CN206016001U (en) * 2016-09-12 2017-03-15 正一集团有限公司 A kind of double L-shaped contignation

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