RU190212U1 - CONSTRUCTION OF STRENGTHENING NECKLACE MECHANICAL CONCRETE MULTIPLASTIC SLIPPING PLATE - Google Patents

Abstract

The utility model relates to construction, in particular, structures for reinforced precast hollow-core slabs reinforcement. The task of the utility model is to design the reinforced concrete hollow-core slab design that will reduce the consumption of fiber-reinforced concrete. The essence of the utility model is that in the reinforced concrete hollow-core slab design overlap, including a plate, which is located in the lower part of the hollow channel of the slab and is made of fiber-reinforced concrete, at the end and cent The upper and lower keys are made in the bottom sections of the plate, while the lower keys are placed in the holes in the lower shelf of the plate, the upper keys are placed in the hollow channel above the plate, the thickness of the fibrous concrete plate is selected from the condition B <D / 2, where B is the height of the fibrous concrete plate; D is the diameter of the hollow channel of the hollow-core slab, the key height is selected from the condition h≥D / 2-B, where h is the key height, the upper keys are made of fiber-reinforced concrete or lightweight concrete, the lower keys are made of fiber-reinforced concrete, light or heavy concrete.

Description

The utility model relates to the construction, in particular, to the structures of reinforced precast concrete hollow-core slabs.

A known reinforcement reinforced concrete hollow-core slab structure, comprising a groove made in the stretched zone of the slab below the hollow of the slab, additional reinforcement that is located in the stretched zone of the slab in the hollow zone of the slab or the zone below the hollow of the slab, the additional reinforcement is equipped with at least two anchors, which are located at the end sections of the additional reinforcement and installed in the holes made in the locations of the specified anchors, the keys made at the end and central sections of the additional of the reinforcement in the holes, groove and emptiness of the slab, the end sections of the additional reinforcement are embedded in these keys, reinforced concrete plates are connected at the level of the additional reinforcement in the areas between the keys (see RU RU 2626499, IPC E04G 23/00, 28.07 .2017 Bull. No. 22).

This design has a high complexity, since it requires making a groove of considerable length in the bottom shelf of the plate. In cramped conditions, this is often not possible.

The closest analogue is the reinforcement construction of a reinforced concrete hollow-core floor slab, which includes a plate located in the hollow channel of the slab and made of fiber-reinforced concrete, while the thickness of the fiber-reinforced concrete plate is chosen from the condition

В≥D / 2,

where B is the height of the fiber-reinforced plate;

D is the diameter of the hollow channel of the hollow-core slab (see patent RU No. 179879, IPC E04G 23/00, 05/28/2018 Bulletin No. 16).

This design significantly increases the own weight of the plate and has a high consumption of materials, as it requires making a plate of fibrous concrete of greater thickness than is necessary to strengthen the stretched zone of the plate.

The task of the utility model is to design the reinforcement of the precast reinforced concrete hollow-core slab, which will reduce the consumption of fiber-reinforced concrete.

The essence of the utility model is that in the construction of reinforced precast reinforced concrete hollow-core slab, which includes a plate, which is located in the lower part of the hollow channel of the plate and is made of fiber-reinforced concrete, the upper and lower keys are made at the end and central sections, while the lower keys are placed in the holes in the bottom shelf of the slab, the upper keys are placed in the hollow channel above the plate, the thickness of the fiber-reinforced concrete plate is chosen from the condition

B <D / 2,

where B is the height of the fiber-reinforced plate;

D is the diameter of the hollow channel of the hollow core plate;

key height is chosen from the condition

h≥D / 2-B,

where h is the height of the key,

the upper keys are made of fiber-reinforced concrete or lightweight concrete, the lower keys are made of fiber-reinforced concrete, light or heavy concrete.

The technical result is achieved by reducing the height of the plate of fiber-reinforced concrete, thanks to anchoring it with the help of upper and lower keys.

The proposed design of reinforced precast reinforced concrete hollow-core slab provides a reduction of material consumption and the cost of reinforcement, allows to reduce the consumption of fiber-reinforced concrete.

The utility model is illustrated by a drawing, where in FIG. 1 shows the reinforcement construction of a precast reinforced concrete hollow-core slab in longitudinal section, and FIG. 2 is a section along the A-A, in FIG. 3 section on BB.

The design of reinforced precast concrete hollow-core slab 1, including plate 2, which is located in the lower part of the hollow channel 3 of plate 1 and is made of fiber-reinforced concrete, the upper 4 and lower 5 keys are made at the end and central sections of the plate 2, while the lower keys 5 are placed in the holes 6 in the lower shelf of the plate 1, the upper keys 4 are placed in the hollow channel 3 above the plate 2, while the thickness of the plate 2 of fiber-reinforced concrete is selected from the condition

B <D / 2,

where B is the height of plate 2 of fiber-reinforced concrete;

D is the diameter of the hollow channel of the hollow core plate;

the height of the upper key 4 is selected from the condition

h≥D / 2-B,

where h is the height of the upper key 4;

the upper keys 4 are made of fiber-reinforced concrete or lightweight concrete, the lower keys 5 are made of fiber-reinforced concrete, light or heavy concrete.

To perform the reinforcement construction in reinforced concrete hollow-core slab 1, holes 6 are punched through. Through holes 6, fiber-concrete plate 2 is concreted in hollow channel 3, and the upper 4 and lower 5 keys are concreted using a concrete pump or manually. To reduce the consumption of fiber-reinforced concrete, the lower keys 5 are made of light or heavy concrete, the upper keys 4 are made of light concrete to prevent mixing of the fiber-concrete of the plate 2 with the concrete of the upper keys 4.

Claims (8)

1. The design of reinforced precast reinforced concrete floor slab, including a plate, which is located in the lower part of the hollow channel of the plate and is made of fiber-reinforced concrete, characterized in that the end and central sections of the plate have upper and lower keys, while the lower keys are placed in the holes in the bottom shelf of the slab, the upper keys are placed in the hollow channel above the plate, the thickness of the fiber-reinforced concrete plate is selected from the condition B <D / 2, where B is the height of the fiber-reinforced plate; D is the diameter of the hollow channel of the hollow core plate. 2. The design according to claim 1, characterized in that the height of the upper key is selected from the condition h≥D / 2-B, where h is the height of the upper key. 3. The design of paragraphs. 1 and 2, characterized in that the upper keys are made of fiber-reinforced concrete or lightweight concrete, the lower keys are made of fiber-reinforced concrete, light or heavy concrete.

Images