SU802473A1 - Device for anchoring prestrained reinforcement - Google Patents

Description

(54) DEVICE FOR ANTENSIVE STRESSED

FITTINGS

one

The invention relates to the field of construction and can be used for the anchoring of high-voltage reinforcement of reinforced concrete structures that do not adhere to concrete.

A device for anchoring reinforcement, made in the form of anchor sleeves 1.

A disadvantage of the known device is the need for complex pressing equipment.

It is also known a device for anchoring rebar, made in the form of wedge anchors 2.

The disadvantage of this device is its increased metal content.

The closest in technical essence and the achieved result is a device for anchoring stressed reinforcement placed without adhesion to concrete in a channel of a reinforced concrete structure containing a stop element with a temporary clip and a concrete anchor placed in the form of a monolithic channel with a corrugated surface 3 However, anchoring this device is time consuming.

The aim of the invention is to reduce the labor-intensiveness and material intensity of anchoring. The goal is achieved by the fact that the stop element is designed in the form of a U-shaped frame with additional shelves installed parallel to the main one, one of which is located at the base of the frame and is associated with a reinforced concrete structure, and the other is in the middle part of the frame. they have coaxial holes arranged along its axis for the passage of reinforcement, while the channel of the concrete anchor is open at the top, and the corrugations are formed on its vertical walls.

FIG. 1 shows the device in plan; in fig. 2 - the same, section A-A of FIG. 1. The anchoring device consists of a groove with vertical grooved walls f, made in the body of a reinforced concrete structure 2. Strain reinforcement 3, located in channel 4, passes through

Claims (3)

groove 1, thrust element 5 in the form of a U-shaped frame, temporary clamp 6 and tensioning device 7. Groove 1 is made with width 3d and length Kd, where d is the diameter of the reinforcement, K is a coefficient characterizing the class of reinforcement, for core reinforcement K 20 -24, for wire reinforcement of a periodic section K 150-170, and for reinforcing ropes K 100-120. The shelves of the stop element 5 have holes 8 for the passage of reinforcement. The anchoring of the tensioned reinforcement is carried out in the following sequence. At the end of the reinforced concrete structure 2, when it is manufactured, a groove with corrugated walls 1 is made. Strain reinforcement 3 is passed through the holes of the stop element 5, inside which a temporary clamp 6 is located. After tensioning the reinforcement, for example with a hydraulic jack 7, the tension reinforcement 3 is temporarily secured using clamp 6 and releasing the tensioning device (jack). Then the cavity of the groove 1 is concreted. After the necessary strength of the monolithic concrete is set, the spun reinforcement is cut, the thrust element 5 and the clamp 6 are removed. The device can be used to anchor the spherical reinforcement of any type of periodic profile in monolithic and precast concrete structures. Filling the open groove with concrete does not require special equipment, allowing the use of hard concrete mixtures of high marks, while injecting channels with cement mortar is a laborious, low-tech process that requires a special mortar pump installation, and the quality of injection is difficult to control. The thrust element is simple to manufacture and, unlike the prototype, is designed for repeated use, which eliminates the consumption of metal on the anchor device. The invention of the Device for anchoring stressed reinforcement placed without adhesion to concrete in a channel of reinforced concrete structure, containing a stop element with a temporary clip and placed in the end of the structure a concrete anchor, made in the form of a monolithic channel with a corrugated surface, characterized in that, in order to reduce labor intensity and material consumption of anchoring, the thrust element is made in the form of a U-shaped frame with additional shelves installed in parallel to the main one of which is located in The frame is aligned with the reinforced concrete structure, and the other is in the middle part of the frame, the shelves of the U-shaped frame have coaxial holes in its axis for the passage of reinforcement, the channel of the concrete anchor is open at the top, and the corrugations are formed on its vertical walls . Sources of information taken into account in the examination 1. UK patent number 1344375, cl. E 04 C 5/12, published. 1974. 2. The patent of France No. 2183945, cl. E 04 G 21/12, publ. 1974. 3. The patent of Germany No. 1484242, Е 04 С 5/12, published. 1973 (prototype).