CN214696356U

CN214696356U - Improved concrete prefabricated hoisting one-way laminated slab

Info

Publication number: CN214696356U
Application number: CN202120340973.5U
Authority: CN
Inventors: 吴清海
Original assignee: Shanghai Xie Heng Engineering Management Co ltd
Current assignee: Shanghai Xie Heng Engineering Management Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-12
Anticipated expiration: 2031-02-05

Abstract

The improved concrete prefabricated hoisting one-way composite slab is characterized in that distributed reinforcing steel bars (10) are uniformly paved in a slab body (1) vertically and horizontally; one side surface of the plate body (1) is longitudinally and parallelly protruded at intervals, and at least two beam ribs (3) are arranged on the plate body by a support (9); prestressed reinforcements (5) are uniformly arranged in the plate body (1) in the longitudinal direction, the prestressed reinforcements (5) are vertically and horizontally connected with the distributed reinforcements (10), and the outer ends of the prestressed reinforcements (5) respectively extend out of the edge of the plate body (1); reinforcing blocks (7) are uniformly arranged on the same side of the beam rib (3), and lifting point supporting blocks (8) are arranged on the edge of the plate body (1) on the same side. When the strength performance of the laminated slab is ensured, the dead weight is reduced, the large-scale production is facilitated, and the stacking, the transportation and the hoisting are facilitated. The integrity and the bearing capacity of the plate body are improved, the rigidity is high, and the mechanical production is convenient. The cast-in-place floor slab has the advantages of saving templates, having good crack resistance, not needing to support the template, not increasing the consumption of reinforcing steel bars, and being capable of being hoisted simultaneously in the structural construction stage, thereby being capable of being inserted into decoration engineering in advance and shortening the construction period of the whole engineering.

Description

Improved concrete prefabricated hoisting one-way laminated slab

Technical Field

The utility model relates to a building precast concrete superimposed sheet institutional advancement technique, especially one-way superimposed sheet of prefabricated hoist and mount of modified concrete.

Background

The laminated slab is an assembled integral floor slab formed by laminating prefabricated slabs and cast-in-place reinforced concrete layers. The composite floor slab is a better structural form combining prefabrication and cast-in-place concrete. The prefabricated prestressed thin plate with the thickness of 5-8 cm and the upper cast-in-place concrete layer are combined into a whole and work together. The prestressed main reinforcement of the thin plate is the main reinforcement of the laminated floor slab, and the upper concrete cast-in-place layer is only provided with negative moment reinforcement and constructional reinforcement. The prestressed thin plate is used as a bottom die of a cast-in-place concrete layer, and a template does not need to be supported by the cast-in-place layer. The bottom surface of the thin plate is smooth and flat, and after plate seams are processed, the ceiling can not be plastered any more.

One component of the composite floor slab is a cast-in-place concrete layer, the thickness of which varies with the span of the floor slab but is at least equal to the thickness of the prefabricated thin slab. With the increase of span, the cast-in-place concrete layer is often filled with expanded polystyrene boards; the expanded polystyrene board is laid on the prefabricated thin board to reduce the weight of cast-in-place concrete and can be used as a heat-insulating and sound-insulating layer of a laminated floor slab. Because the distribution reinforcing steel bars are arranged in the cast-in-place concrete layer, peak-to-peak fulcrums are formed, and the box-shaped section becomes a continuous structure. And additionally, steel bars and prepared pipelines are laid in the cast-in-situ layer according to the requirements of gaps, fire prevention and the like.

The prestressed concrete thin plate laminated floor slab can be designed into a unidirectional plate and a bidirectional plate. When the unidirectional plate is used, the width of the prefabricated prestressed concrete upper thin plate can be divided into blocks according to rooms or beam grids, generally within 1500mm, and the thickness can be 40-60 mm according to the span of the plate, namely 2.4-6.6 m. The bidirectional plate is commonly used for houses such as high-rise houses, apartments, restaurants and the like, a whole bay is generally adopted to be a prefabricated prestressed concrete thin plate, and the thickness of the prefabricated prestressed concrete thin plate is 40-60 mm according to the size of the plate. The laminated floor slab has three functions of bottom die, floor slab reinforcing bar and flat bottom surface, so that it has the advantages of saving steel die, reducing field reinforcing bar operation and no need of plastering on the ceiling. In addition, the steel wire protective layer of the thin plate is thick, so that the fireproof requirement can be well met.

The processing of the sheet faces is critical to ensure good bonding with the superimposed sheet, so that the failure mode of the superimposed sheet is bending failure, and no shearing failure along the superimposed sheet occurs.

The prior art mainly adopts a method of reserving a combination rib. But for common civil buildings, the floor load is small, and the shearing force of the plate is only 0.2-0.3N/mm²Much less than the shear strength of concrete, only byThe sheet surface roughness is relied upon to enhance adhesion to the laminate. Meanwhile, because the concrete ribs with holes are arranged, the concrete ribs are difficult to machine, and the existing in-line enterprises adopt manual manufacturing, so that the quality and the production efficiency of products are not convenient to improve; the foam core moulds in the holes are large in quantity, serious in white pollution and prone to hole collapse. Moreover, the bonding force between the superposed layer and the bottom plate is small, the self weight of the bottom plate is large, the requirement on hoisting machinery is high, and the installation progress is slow. In the transportation and stacking process, a large number of wood cushion blocks are needed, and the wood cushion blocks are difficult to recover, so that a large amount of wood is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an one-way superimposed sheet of prefabricated hoist and mount of modified concrete when guaranteeing superimposed sheet intensity performance lightens the dead weight, makes things convenient for large-scale production, but also is convenient for put things in good order, transportation and hoist and mount.

The purpose of the utility model is realized by the following technical measures: an improved precast concrete hoisting one-way composite slab comprises a slab body, beam reinforcements, prestressed reinforcements, a bracket and distributed reinforcements; uniformly paving distributed reinforcing steel bars in the plate body vertically and horizontally; the surface of one side of the plate body is longitudinally parallel and protrudes at intervals, and at least two beam ribs are arranged on the surface of one side of the plate body by a bracket; prestressed steel bars are longitudinally and uniformly arranged in the plate body, the prestressed steel bars are vertically and horizontally connected with the distributed steel bars, and the outer ends of the prestressed steel bars respectively extend out of the edge of the plate body; reinforcing blocks are uniformly arranged on the same side of the beam rib, and lifting point supporting blocks are arranged on the edges of the plate bodies on the same side.

In particular, the reinforcing ribs are obliquely connected between the lower part of the bracket and the distributed reinforcing steel bars.

In particular, the beam is fixed to the top of a set of brackets.

In particular, diagonal braces are obliquely connected between two sides of the beam and the bottom end of the bracket respectively.

Particularly, longitudinal steel bars are longitudinally and parallelly arranged between two adjacent prestressed steel bars.

Particularly, the surface of the plate body on one side of the beam rib is a rough surface.

In particular, the plate body is provided with a combination hole.

In particular, shear steel bars are laid in parallel on the lower sides of the beam ribs.

In particular, the reinforcing block and the hoisting point support block are reinforced concrete structures, wherein the reinforced concrete structures are connected with the distribution steel bars.

In particular, the stent is in the shape of a wave, a spiral or a triangular section formed by bending a spot welding net sheet.

The utility model discloses an advantage and effect: the integrity and the bearing capacity of the plate body are improved, the rigidity is high, and the mechanical production is convenient. The cast-in-place floor slab has the advantages of saving templates, having good crack resistance, not needing to support the template, not increasing the consumption of reinforcing steel bars, and being capable of being hoisted simultaneously in the structural construction stage, thereby being capable of being inserted into decoration engineering in advance and shortening the construction period of the whole engineering.

Drawings

Fig. 1 is a schematic front view of an embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic top view partially in section of fig. 1.

Fig. 4 is a reinforcement diagram of the embodiment of the present invention.

The utility model discloses embodiment 1 schematic structure.

The reference numerals include:

plate body 1, strengthening rib 2, roof beam muscle 3, diagonal reinforcement 4, prestressing steel 5, vertical reinforcement 6, reinforcing block 7, hoisting point piece 8, support 9, distribution reinforcing bar 10.

Detailed Description

The utility model discloses the principle lies in, through addding reinforcing block 7 and hoisting point brace piece 8 to improve strengthening rib 2, roof beam muscle 3, oblique reinforcement 4 and support 9, combine steel bar truss and prestressing force technique, not only make the product be convenient for mechanized production, but also the width of the prestressing force bottom plate thickness of attenuate superimposed sheet and multiplicable superimposed sheet. After the plate body 1 is thinned, the dead weight can be reduced, the requirement on hoisting machinery is reduced, and the construction progress is accelerated conveniently. The hoisting point supporting block 8 can also be used as a supporting point for the transportation and the stacking of the prestressed bottom plate, and a wood cushion block arranged in the transportation and the stacking in the prior art is not needed any more, so that a large amount of wood can be saved.

The utility model can be widely used in various house construction projects such as hotels, office buildings, schools, houses, hospitals, warehouses, parking lots, multi-storey industrial factory buildings and the like.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in attached figures 1, 2, 3 and 4, an improved precast concrete hoisting one-way composite slab comprises a slab body 1, beam reinforcements 3, prestressed reinforcements 5, a bracket 9 and distribution reinforcements 10; uniformly paving distributed reinforcing steel bars 10 in the plate body 1 in a longitudinal and transverse mode; one side surface of the plate body 1 is longitudinally and parallelly protruded at intervals, and at least two beam ribs 3 are arranged on the plate body by a support 9; prestressed steel bars 5 are longitudinally and uniformly arranged in the plate body 1, the prestressed steel bars 5 are vertically and horizontally connected with the distributed steel bars 10, and the outer ends of the prestressed steel bars 5 respectively extend out of the edge of the plate body 1; reinforcing blocks 7 are uniformly arranged on the same side of the beam rib 3, and a hanging point supporting block 8 is arranged on the edge of the plate body 1 on the same side.

In the foregoing, the reinforcing bars 2 are connected between the lower portion of the bracket 9 and the distribution reinforcing bars 10 in an inclined manner.

In the foregoing, the beam rib 3 is fixed to the top end of a set of brackets 9.

In the foregoing, the oblique braces 4 are respectively connected between the two sides of the beam rib 3 and the bottom end of the bracket 9 in an inclined manner.

In the foregoing, the longitudinal reinforcements 6 are longitudinally and parallelly installed between two adjacent prestressed reinforcements 5.

In the foregoing, the surface of the plate body 1 on the side of the beam rib 3 is a rough surface.

In the foregoing, the plate body 1 is provided with a combining hole.

In the foregoing, the shear reinforcement is laid in parallel under the beam 3.

In the foregoing, the reinforcing block 7 and the hoisting point support block 8 are of a reinforced concrete structure, wherein the reinforced concrete structure is connected with the distributed steel bars 10.

In the above, the stent 9 is in the shape of a wave, a spiral, or a triangular cross section formed by bending a spot welding mesh sheet. The support 9 is used for stably connecting the beam rib 3 and the plate body 1, and the support 9 and the beam rib 3 form a steel truss together for strengthening the rigidity of the thin plate during construction and reducing the support erected below the thin plate.

The embodiment of the utility model provides an in, C side rough surface is the assembly direction, and the M side is template assembly direction. The concave-convex depth of the C-side rough surface is not less than 4mm, and the C-side rough surface and the hanging point 8 are marked by adopting paint. The strength grade of the precast slabs 11 and the cast-in-place concrete with the rough surface on the C side is C30.

The embodiment of the utility model provides an in, the long 4750mm of plate body 1, wide 2500mm, plate body 1 thickness is 60mm, and wherein the inboard concrete thickness of C side mat surface is 20mm, and the inboard concrete of M side is thick 10mm at least. The distance between two adjacent beam ribs 3 is 400mm, and the distance between the outermost beam rib 3 and the edge is 150 mm. The distance between the distributed reinforcing steel bars 10 is 140 mm and 150 mm.

The embodiment of the utility model provides an in, the long general 4 ~ 6m of plate body 1 span, the biggest span can reach 9 m.

In the embodiment of the utility model provides an in, hoisting point 8 can also regard as the strong point of transportation and pile.

The embodiment of the utility model provides an in, plate body 1 is when using, and light foaming thermal-insulated insulation material of mat formation partially or comprehensively on the mat surface C side exposes strengthening rib 2, roof beam muscle 3, diagonal reinforcement 4 and support 9, adopts prestressing steel 5, longitudinal reinforcement 6 interconnect between two adjacent plate bodies 1, then cast in situ concrete on it again.

Claims

1. The improved precast concrete hoisting one-way composite slab comprises a slab body (1), beam reinforcements (3), prestressed reinforcements (5), a bracket (9) and distribution reinforcements (10); it is characterized in that reinforcing steel bars (10) are uniformly paved in the plate body (1) in a longitudinal and transverse mode; one side surface of the plate body (1) is longitudinally and parallelly protruded at intervals, and at least two beam ribs (3) are arranged on the plate body by a support (9); prestressed reinforcements (5) are uniformly arranged in the plate body (1) in the longitudinal direction, the prestressed reinforcements (5) are vertically and horizontally connected with the distributed reinforcements (10), and the outer ends of the prestressed reinforcements (5) respectively extend out of the edge of the plate body (1); reinforcing blocks (7) are uniformly arranged on the same side of the beam rib (3), and lifting point supporting blocks (8) are arranged on the edge of the plate body (1) on the same side.

2. The improved precast concrete one-way composite hoisting slab as set forth in claim 1, wherein the reinforcing bars (2) are connected between the lower portion of the supporting frame (9) and the distribution reinforcing bars (10) in an inclined manner.

3. The improved precast concrete one-way composite hoisting slab as recited in claim 1, wherein the beam rib (3) is fixed on top of a set of brackets (9).

4. The improved precast concrete one-way composite slab for hoisting as set forth in claim 1, wherein diagonal braces (4) are connected between both sides of the beam rib (3) and the bottom ends of the brackets (9) in an inclined manner, respectively.

5. The improved precast concrete one-way composite hoisting slab as recited in claim 1, wherein the longitudinal reinforcements (6) are installed in parallel longitudinally between the two adjacent prestressed reinforcements (5).

6. The improved precast concrete one-way composite hoisting slab as recited in claim 1, wherein the surface of the slab body (1) on the side of the beam rib (3) is rough.

7. The improved precast concrete one-way composite hoisting slab as recited in claim 1, wherein the slab body (1) is provided with a combination hole.

8. The improved precast concrete one-way composite hoisted slab as set forth in claim 1, wherein shear reinforcements are laid in parallel on the lower sides of the girders (3).

9. The improved precast concrete one-way composite hoisting slab as recited in claim 1, characterized in that the reinforcing blocks (7) and the hoisting point supporting blocks (8) are reinforced concrete structures, wherein the reinforced concrete structures are connected with the distribution steel bars (10).

10. The improved precast concrete hoisting one-way composite slab as recited in claim 1, wherein the support (9) is in the shape of a wave, a spiral, and a spot welded mesh folded into a triangular section.