RU2820631C9 - Method of connecting reinforcement of reinforced concrete structures and device for its implementation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to methods of connecting reinforcement of reinforced concrete structures using connecting sleeves. Connecting sleeve assembly with process cage is put on ends of fittings. Process cage is filled with water and cooled. Water turns into ice—hydrostatic reduction of the connecting sleeve takes place.

EFFECT: simplified technology of reinforcement connection, high pressure of hydrostatic reduction is provided during conversion of water into ice, P=205 MPa, which allows high-quality crimping of connecting sleeve with filling of reinforcement profile.

4 cl, 4 dwg

Description

The invention relates to the construction industry, namely to methods and devices for their implementation, used for connecting reinforcement of reinforced concrete structures by compressing connecting sleeves.

There is a known method of connecting reinforcement using connecting sleeves, crimped by hand presses with replaceable inserts, see www.enerprom/com/news/36.html. The disadvantage of this method is the need to use high-pressure pumping stations (70 MPa) and manual hydraulic presses weighing up to 50 kg. The connection of the reinforcement is carried out through repeated mechanical compression of the bushings, and the quality of the connections largely depends on the skill of the operator.

There is also a known method for connecting fittings using connecting bushings, compressed by hydrostatic pressure of the working environment using pumping stations, see patent RU 245817. This technology also requires the use of expensive equipment - high-pressure pumping stations. In this case, the pressure of the working medium depends on the type of pumping station and does not exceed 80 - 100 MPa, which limits the possibility of using this method.

The method of connecting fittings using connecting bushings, compressed by hydrostatic pressure of the working medium using pumping stations, see patent RU 245817, is closest to the claimed method.

A method and devices are proposed for connecting reinforcement of reinforced concrete structures using connecting bushings, compressed by hydrostatic water pressure. The device for implementing the method consists of: a technological holder, a screen and a latch. The technological holder has an internal groove.

The fittings are connected as follows:

1. The connecting sleeve is placed in the technological holder and put on the ends of the fittings; 2. Fill the technological casing with water; 3. Cool the cage with a refrigerant, for example, dry ice, the water turns into ice - the connecting sleeve is compressed and the ends of the fittings are connected; 4. Remove the technological holder from the valve.

The essence of the invention is illustrated in Fig. 1, 2, 3 and 4.

In fig. Figure 1 shows an implementation option for the proposed method of connecting reinforcement with a vertical arrangement of reinforcement.

In fig. 2 - option for horizontal and inclined arrangement of reinforcement. Where: 1 and 2 - fittings, 3 - retainer, 4 - connecting sleeve, 5 - technological casing, 5.1 - o-ring/sealing rings, 5.2 - hole for filling the technological casing with water, 5.3 plug, 5.4 - hole for air release, 5.5 - plug, 6 - screen, 7 - water, 8 - dry ice.

With a vertical arrangement of the fittings, the technological casing 5 has 1 annular groove in which the sealing ring 5.1 is located, and a hole 5.2 for filling the technological casing with water with a plug 5.3.

With a horizontal and inclined arrangement of the fittings, the technological casing 5 has 2 annular grooves in which sealing rings 5.1 are installed, a hole 5.2 for filling the technological casing with water with a plug 5.3 and a hole 5.4 for releasing air with a plug 5.5 - they are located on the side surface of the casing.

In fig. Figure 3 shows an embodiment of the proposed method when using a detachable technological holder, consisting of two half-rings 5.6 and 5.7 and connecting inserts 5.8. In the half rings 5.6 and 5.7 there are trapezoidal openings for connecting inserts 5.8, see Fig. 3. The detachable technological casing is assembled before starting work. Sealing of the inner recess of the cage, it is filled with water, is ensured by lubrication of the mating surfaces of the half rings 5.6 and 5.7 of the cage and connecting inserts 5.8. Semi-liquid and grease lubricants can be used as lubricants. The use of a detachable technological clip allows you to remove the clip from the reinforcement directly in the compression zone of the connecting sleeve, removing the connecting inserts 5.8 from the half-rings 5.6 and 5.7.

The sequence of technological operations when assembling the technological casing:

1. The mating surfaces of the half rings 5.6 and 5.7 and connecting inserts 5.8 are lubricated with lubricants.

2. Connect half rings 5.6 and 5.7 and insert connecting inserts 5.8 into them.

Sequence of technological operations when connecting fittings:

1. Install clamp 3 on reinforcement 1.

2. The sealing ring/sealing rings 5.1 are installed in the technological holder 5.

3. Connecting sleeve 4 is installed in technological holder 5.

4. Place 1 technological clip 5 assembled with connecting sleeve 4 onto the reinforcement.

5. Fill with water 7 the cavity formed by the outer surface of the connecting sleeve 4 and the internal recess of the technological holder 5.

6. Screw in the plug/plugs 5.3/5.3 and 5.5.

7. Screen 6 is installed on the technological holder 5.

8. Reinforcement 2 is inserted into connecting sleeve 4.

9. Fill the gap between the technological holder 5 and the screen 6 with dry ice 8.

10. Technological sleeve 5 cools - water 7 turns into ice. Hydrostatic compression of the connecting sleeve 4 occurs.

11. After hydrostatic compression of the connecting sleeve, screen 6 and retainer 3 are removed from the reinforcement.

12. Technological clip 5 is removed from the connecting sleeve 4 and from the fittings 2.

In fig. Figure 4 shows a diagram of the removal of the technological one-piece holder from the reinforcement after crimping the connecting sleeve with a vertical arrangement of the reinforcement. Where: 1 and 2 - lower and upper fittings, connecting sleeve 4, technological holder 5, telescopic rod 9.

After compressing the connecting sleeve 4, the technological clip 5 is removed from it. The technological clip 5 is attached to the telescopic rod 9 and, moving along the upper reinforcement 2, is removed from the fittings, see Fig. 4.

Technical result of using this method of connecting reinforcement:

1. Simplicity of technology for connecting reinforcement.

2. No expensive equipment required.

3. The pressure of hydrostatic compression of the connecting sleeve when turning water into ice, P = 205 MPa, see chipmaker.ru, is more than 2 times higher than the pressure of the working medium when using pumping stations and allows high-quality compression of the connecting sleeve with filling the reinforcement profile.

Claims (8)

1. A method of connecting reinforcement of reinforced concrete structures with a connecting sleeve, compressed by hydrostatic water pressure, including the following technological operations: 1) a connecting sleeve assembled with the technological holder of the device for connecting the reinforcement is put on the ends of the reinforcement; 2) pour water into the recess of the technological casing; 3) cool the cage with a coolant, for example dry ice, to compress the bushing; 4) after compressing the connecting sleeve, the technological holder is removed from the valve. 2. The method according to claim 1, characterized in that the technological holder of the device is made one-piece or detachable, consisting of two half-rings and connecting inserts. 3. The method according to claim 2, characterized in that the technological holder is removed from the reinforcement directly in the compression zone of the connecting sleeve, for which the connecting inserts are removed from the detachable holder, or using a telescopic rod, moving the technological holder along the reinforcement. 4. A device for connecting reinforcement of reinforced concrete structures, including a connecting sleeve placed in a technological casing, a technological casing with an internal recess for filling with water, one-piece or detachable, consisting of two half-rings and connecting inserts, a screen installed on the technological casing with a gap for placing the refrigerant , such as dry ice, and a retainer mounted on the fixture.