CN209443637U - A kind of precast floor slab - Google Patents

Abstract

The utility model discloses a prefabricated floor slab, which belongs to the field of civil engineering assembled structures. The utility model comprises a prefabricated floor slab body. Wing plates are poured on the left and right sides of the bottom of the prefabricated floor slab body. The prefabricated floor slab body is fixed with a number of horizontal steel bars arranged in parallel near the upper surface. The other side of the main body is provided with a reinforcing bar channel, and the upper surface of the prefabricated floor body is provided with a grouting hole corresponding to the reinforcing bar channel. The lower part of the prefabricated floor slabs is connected by the wing plate, and the upper part is penetrated into the steel bar channel by the transverse steel bar and injected into the grouting material to cement and solidify the connection. The utility model improves the weakening of the rigidity of the floor slab due to the existence of splicing joints, and ensures the in-plane rigidity and integrity of the prefabricated floor slab.

Description

a prefabricated floor

technical field

The utility model relates to a prefabricated floor slab, which belongs to the field of civil engineering assembled structures.

Background technique

The prefabricated structure has the characteristics of green buildings such as industrialized production, standardized production, and ex situ reconstruction. In addition, it has the advantages of short construction period, good seismic performance, and labor saving. It has broad development prospects and application value. However, the prefabricated floor slabs used in the prefabricated structure, due to the existence of splicing joints, make the plane stiffness of the floor slab discontinuous, which affects the overall function of the floor slab.

The utility model improves the stiffness of the floor at the seam by enlarging the cross-sectional size of the local floor at the seam and strengthening the connection at the seam, thereby improving the weakening of the stiffness of the floor due to the existence of the seam and ensuring the integrity of the prefabricated floor. In-plane stiffness and integrity.

Contents of the invention

The utility model provides a prefabricated floor slab to solve the weakening of the rigidity of the floor slab due to the existence of seams.

In order to achieve the above object, the utility model provides the following technical solutions:

A prefabricated floor slab, comprising a prefabricated floor slab body, the left and right sides of the bottom of the prefabricated floor slab body are poured with wing plates 2, the prefabricated floor slab body is fixed with a number of horizontal steel bars 5 arranged in parallel near the upper surface, and one end of the horizontal steel bars 5 protrudes from the prefabricated floor. One side of the floor slab body and the other side of the prefabricated floor slab body are provided with steel bar channels 6 , and the upper surface of the prefabricated floor slab body is provided with grouting holes 7 corresponding to the steel bar channel 6 .

Further, the wing plate 2 and the prefabricated floor body are poured integrally, and the end faces of the two are flush.

Further, the height and width of the wing plate 2 are both 3/5 of the thickness of the prefabricated floor slab body.

Further, a longitudinal steel bar 1 is pre-embedded in the wing plate 2 , and a through hole 8 is opened on the side of the wing plate 2 , and the through hole 8 is located above the longitudinal steel bar 1 .

Further, the length of the transverse reinforcement 5 protruding from the main body of the prefabricated floor slab is 5 times its diameter.

Further, the steel bar channel 6 has a diameter of 10-18 mm and a length of 1 mm, and l satisfies: 5d+ 20≤l≤5d +40, where d is the diameter of the transverse steel bar 5.

Further, the diameter of the grouting hole 7 is 20-28mm.

Beneficial effects of the utility model: the wing plate poured integrally with the prefabricated floor slab increases the cross-sectional size of the local floor slab at the splicing joint; The stiffness of the floor slab ensures that the prefabricated floor slab has sufficient plane stiffness, can transmit horizontal force to each vertical component, and cooperate with the vertical lateral force-resistant component to work together.

Description of drawings

Figure 1 is a sectional view of a prefabricated floor;

Fig. 2 is a prefabricated floor plan;

Figure 3 is a schematic diagram of the connection of two prefabricated floor slabs;

Each label in Fig. 1-3: 1-longitudinal reinforcement; .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Embodiment 1: As shown in Figure 1-2, a prefabricated floor slab includes a prefabricated floor slab body, the left and right sides of the bottom of the prefabricated floor slab body are poured with wing plates 2, and the prefabricated floor slab body is fixed near the upper surface with several parallel-arranged Horizontal reinforcement 5, one end of the horizontal reinforcement 5 protrudes from one side of the prefabricated floor body, the other side of the prefabricated floor body is provided with a reinforcement channel 6, and the upper surface of the prefabricated floor body is provided with a grouting hole 7 corresponding to the reinforcement channel 6.

A longitudinal steel bar 1 is pre-embedded in the wing plate 2, and a through hole 8 is opened on the side of the wing plate 2, and the through hole 8 is located above the longitudinal steel bar 1. When splicing the prefabricated floor slabs, as shown in Figure 3, The wing plates 2 between two adjacent prefabricated floors are connected by the steel backing plate 3 and the pull bolts 4, and the upper part of one prefabricated floor slab penetrates into the steel bar channel 6 corresponding to the other prefabricated floor slab through the transverse steel bars 5, and is grouted The grouting material is injected into the hole 7 to cement and solidify the connection, namely to fix the upper part and the lower part of the two prefabricated floor slabs respectively.

Embodiment 2: In this embodiment, the wing plate 2 and the prefabricated floor body are poured integrally, the end surfaces of both are flush, and the height and width of the wing plate 2 are 3/5 of the thickness of the prefabricated floor body.

At the bottom of the prefabricated floor body, there are also several longitudinal reinforcements to strengthen the overall strength, but only the longitudinal reinforcements 1 and transverse reinforcements 5 that require special requirements at the connection are marked in the figure. Among them, the diameter of the longitudinal reinforcement 1 is the same as that of the longitudinal reinforcement at the bottom of the prefabricated floor body; the length of the transverse reinforcement 5 protruding from the prefabricated floor body is 5 times its diameter; the diameter of the reinforcement channel 6 is 10-18 mm, and the length is 1 mm, and l satisfies: 5d +20≤ l ≤5d+40, where d is the diameter of the transverse steel bar 5; the diameter of the tension bolt is 14~18mm; the diameter of the grouting hole 7 is 20~28mm.

Other sizes can also be used in specific implementation, which is not limited by the examples of the present utility model.

The description of the examples in this specification is only used to help understand the core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and application scope.

Claims (7)

1. A prefabricated floor, including a prefabricated floor body, characterized in that: the left and right sides of the bottom of the prefabricated floor body are poured with wing plates (2), and the prefabricated floor body is fixed with a number of horizontal steel bars (5) arranged in parallel near the upper surface , one end of the transverse steel bar (5) protrudes from one side of the prefabricated floor body, the other side of the prefabricated floor body is provided with a reinforcement channel (6), and the upper surface of the prefabricated floor body is provided with a grouting hole (7) corresponding to the reinforcement channel (6) . 2. The prefabricated floor slab according to claim 1, characterized in that: the wing plate (2) and the prefabricated floor slab body are poured integrally, and the end surfaces of both are flush. 3. The prefabricated floor slab according to claim 1 or 2, characterized in that: the height and width of the wing plate (2) are both 3/5 of the thickness of the prefabricated floor slab body. 4. The prefabricated floor slab according to claim 1 or 2, characterized in that: a longitudinal steel bar (1) is pre-embedded in the wing plate (2), and a through hole (8) is opened on the side of the wing plate (2), And the through hole (8) is located above the longitudinal reinforcement (1). 5. The prefabricated floor slab according to claim 1, characterized in that: the length of the transverse reinforcement (5) protruding from the prefabricated floor slab body is 5 times its diameter. 6. The prefabricated floor slab according to claim 1, characterized in that: the steel bar channel (6) has a diameter of 10-18 mm and a length of l , and l satisfies: 5d+ 20≤l≤5d +40, where d is the horizontal direction The diameter of the bar (5). 7. The prefabricated floor slab according to claim 1, characterized in that: the diameter of the grouting hole (7) is 20-28 mm.