CN211229110U

CN211229110U - Support-free precast concrete laminated slab

Info

Publication number: CN211229110U
Application number: CN201921674112.XU
Authority: CN
Inventors: 边福冬
Original assignee: Inner Mongolia Zhongduo Yuanda Construction Industry Co ltd
Current assignee: Inner Mongolia Zhongduo Yuanda Construction Industry Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-08-11
Anticipated expiration: 2029-10-09

Abstract

The support-free precast concrete composite slab comprises a precast floor slab, a reinforcing mesh embedded in the precast floor slab and N skeleton beams which are arranged in parallel at equal intervals, wherein N is an integer larger than 1, and the lower parts of the skeleton beams are embedded in the precast floor slab and fixedly connected with the reinforcing mesh; two ends of the framework beam extend out of the prefabricated floor slab, and steel base plates are arranged at the bottoms of the two ends of the framework beam. The utility model discloses in, the lower part of skeleton roof beam is embedded to be set up in prefabricated floor for whole loads in the work progress are undertaken by the skeleton roof beam, and the steel backing plate at skeleton roof beam both ends can be taken prefabricated floor and establish on the wall body, realizes need not to support the support body and can place prefabricated floor.

Description

Support-free precast concrete laminated slab

Technical Field

The utility model belongs to building structure, concretely relates to exempt from to support precast concrete superimposed sheet.

Background

At present, in the construction process of a prefabricated composite floor slab which is used in large quantity in the field of domestic constructional engineering and in a certain curing time after concrete pouring of a cast-in-place layer above the prefabricated composite floor slab, a support frame body is required to be arranged below the prefabricated composite floor slab so as to ensure that a prefabricated part and the cast-in-place composite part form a reliable whole.

Because the existence of the support frame body leads the removal of the support frame to wait for the maintenance period, the removal time of the project adopting the prefabricated composite floor slab is the same as that of the support frame body of the project adopting the cast-in-place floor slab, the aim of shortening the project construction period can not be realized even if the prefabricated composite floor slab is adopted, and meanwhile, the construction cost of adopting the prefabricated composite floor slab is higher than that of the cast-in-place floor slab.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects are overcome, and the precast concrete composite slab is free of a support frame body and low in cost.

The utility model discloses the technical scheme who adopts is: the support-free precast concrete composite slab comprises a precast floor slab, a reinforcing mesh embedded in the precast floor slab and N skeleton beams which are arranged in parallel at equal intervals, wherein N is an integer larger than 1, and the lower parts of the skeleton beams are embedded in the precast floor slab and fixedly connected with the reinforcing mesh; two ends of the framework beam extend out of the prefabricated floor slab, and steel base plates are arranged at the bottoms of the two ends of the framework beam.

According to the technical scheme, the lower parts of the framework beams are embedded in the prefabricated floor slabs, so that all loads in the construction process are borne by the framework beams, the prefabricated floor slabs can be erected on a wall body through the steel base plates at the two ends of the framework beams, and the prefabricated floor slabs can be placed without supporting a frame body.

Preferably, the bottom surface of the steel backing plate and the bottom surface of the precast floor slab are on the same horizontal plane.

Preferably, the reinforcing mesh comprises longitudinal reinforcing steel bars located at a lower layer and transverse reinforcing steel bars located at an upper layer, which are mutually connected, and the framework beams and the longitudinal reinforcing steel bars at the lower layer are arranged in the same direction and at the same layer.

Preferably, the framework beams are lattice steel beams, the web plates of the lattice steel beams comprise solid web plates and hollow web plates which are alternately arranged, and the transverse steel bars vertically penetrate through the hollow web plates.

Preferably, the framework beam is a stirrup type reinforcement beam, the stirrup type reinforcement beam comprises a triangular beam main reinforcement and triangular stirrups arranged on the triangular beam main reinforcement, and the transverse reinforcement vertically penetrates through a gap between the triangular stirrups.

Preferably, both ends of the framework beam extend to the center of the wall body respectively.

The utility model has the advantages that: 1. the arrangement of the lattice type steel beams or the stirrup type steel beam can enhance the combination performance with the prefabricated floor slab, and the support-free can be realized through the steel base plates arranged at the two ends; 2. the steel beam can be used as a hoisting ring in the hoisting process; 3. the construction efficiency can be improved, a large amount of manpower and material resources are saved, and the construction cost is saved.

Drawings

Fig. 1 is a front view of a first embodiment of the present invention;

fig. 2 is a front view of a first embodiment of the present invention;

FIG. 3 is a schematic view of a lattice steel beam according to an embodiment of the present invention;

fig. 4 is a front view of a second embodiment of the present invention;

fig. 5 is a schematic view of a stirrup beam according to a second embodiment of the present invention;

Detailed Description

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

Example one

As shown in fig. 1-3, a support-free precast concrete composite slab includes a precast floor slab 1, transverse steel bars 3, longitudinal steel bars 2, and N skeleton beams 4 arranged at equal intervals, wherein N is an integer greater than 1, and the lower portions of the skeleton beams are embedded in the precast floor slab; two ends of the framework beam 4 extend out of the prefabricated floor slab, and steel backing plates 5 are arranged at the bottoms of the two ends.

The lower parts of the framework beams 4 are embedded in the prefabricated floor slab 1, so that all loads in the construction process are borne by the framework beams 4, the prefabricated floor slab can be supported on a wall body through the steel base plates 5 at two ends of the framework beams 4, and the prefabricated floor slab can be placed without a support frame body.

The number of the framework beams 4 can be determined by calculation according to specific engineering use conditions.

Furthermore, the bottom surface of the steel base plate 5 and the bottom surface of the prefabricated floor slab are on the same horizontal plane, so that the steel base plate and the top surface of the wall body can be kept horizontal when being installed conveniently.

Furthermore, two ends of the framework beam respectively extend to the center of the supporting wall.

The framework beam 4 is a lattice type steel beam, a web plate of the lattice type steel beam comprises solid web plates 6 and hollow web plates 7 which are alternately arranged so as to improve the bonding performance of the steel beam and concrete, the transverse steel bars 3 vertically penetrate through the hollow web plates, the longitudinal steel bars 2 and the lattice type steel beam are arranged in the same layer in the same direction, and at the moment, the longitudinal steel bars in the same direction as the steel beam do not need to be arranged at the lower flange of the steel beam.

In this embodiment, longitudinal steel bars 2 and transverse steel bars 3 may extend out of prefabricated floor slab 1, or may be completely disposed inside prefabricated floor slab 1.

The height of the lattice steel beam (between the outer surfaces of the upper and lower flanges) can be designed by subtracting the thickness of the upper and lower protective layers of the lattice steel beam from the thickness of the laminated plate (including the cast-in-situ layer).

Example two

As shown in fig. 4 to 5, the difference from the embodiment is that the frame beam 4 is a stirrup-type beam, the stirrup-type beam includes a triangular beam main rib 8 and a triangular stirrup 9 arranged on the triangular beam main rib, the transverse reinforcement 3 vertically penetrates through a gap between the triangular stirrups, the longitudinal reinforcement 2 and the stirrup-type beam are arranged in the same direction and in the same layer, and the longitudinal reinforcement is not required to be arranged at the bottom of the stirrup-type beam.

Claims

1. The support-free precast concrete composite slab comprises a precast floor slab (1) and a reinforcing mesh embedded in the precast floor slab (1), and is characterized by further comprising N skeleton beams (4) which are arranged in parallel at equal intervals, wherein N is an integer larger than 1, and the lower parts of the skeleton beams (4) are embedded in the precast floor slab (1) and fixedly connected with the reinforcing mesh; two ends of the framework beam extend out of the prefabricated floor slab, and steel base plates (5) are arranged at the bottoms of the two ends of the framework beam.

2. A support-free precast concrete composite slab according to claim 1, wherein the bottom surface of the steel setting plate (5) is on the same level with the bottom surface of the precast floor slab (1).

3. A support-free precast concrete composite slab as claimed in claim 1, wherein the reinforcing mesh comprises longitudinal reinforcing bars (2) at a lower layer and transverse reinforcing bars (3) at an upper layer which are connected with each other, and the frame beams (4) are disposed at the same layer as the longitudinal reinforcing bars (2).

4. A support-free precast concrete composite slab as claimed in claim 3, wherein said skeleton beams (4) are lattice beams, said webs of said lattice beams comprise solid webs (6) and hollow webs (7) alternately arranged, and said transverse reinforcing bars (3) vertically pass through said hollow webs (7).

5. A support-free precast concrete composite slab as claimed in claim 3, wherein said framework beams (4) are stirrup-type reinforcing beams comprising a triangular beam main rib (8) and a triangular stirrup (9) provided on the triangular beam main rib, and said transverse reinforcing bar (3) vertically penetrates through a gap between the triangular stirrups.

6. A support-free precast concrete composite slab according to any one of claims 1 to 5, wherein both ends of the frame beams (4) are extended to the center of the support wall, respectively.