RU2661514C2 - Anchoring device - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: anchoring device consists of reinforcing beams containing twisted wire reinforcing strands and placed, with the exception of the end sections, in lubricant-filled protective shells, and anchors, each of which comprises a base plate, an anchor yoke made with coaxial cylindrical channels and conical recesses, in which wedge clamps are located. The end sections of the reinforcing strands are located in the wedge clamps. Each base plate is made in the form of a disk with cylindrical channels coaxial with the corresponding channels of the anchor yoke, in which the protective shells of the anchor strands are arranged with the possibility of sealing. Sealing is carried out by a lubricant. The end sections of cylindrical channels of the anchor yoke are made with cylindrical bores coaxial with the channels of the base plate, in which the shell ends of the corresponding reinforcing strands are arranged with the possibility to interact with their end part. Each shell end, the ends of the wedge clamps, the cylindrical channel and the end section of the reinforcing strand form an airtight chamber filled with a lubricant. The sections of the reinforcing strands above the wedge clamps are protected with casings and a protective cup.

EFFECT: simplifying and increasing the reliability of corrosion protection, facilitating the repair work of the anchor device, reducing the size and improving the reliability of the base plate.

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Description

The invention relates to the field of construction and is intended for use in the manufacture or construction of prestressed concrete structures and structures with increased cracking requirements, especially those operating in an aggressive environment, as well as with high efforts in prestressing reinforcement of beams, spans of bridges, tunnels, tanks, silos , hulls, protective shells of nuclear plants, in which high-strength enclosed in protective shells are used as prestressing reinforcement s reinforcing beams which are laid along a straight or curved path in the channels, followed by filling them with cement mortar.

It is known an anchor device consisting of reinforcing beams containing twisted wire reinforcing strands, located, with the exception of the end sections, in the protective shells filled with grease, and anchors, each of which contains a base plate, an anchor clip made with coaxial cylindrical channels and conical undercuts, wedge clamps located in the conical undercuts, in which the end sections of the reinforcing strands are located [1].

For reliable retention of the strands in the wedge clamps of the anchor ring, the protective shell is removed in the area of the wedge clamps. After this, special measures must be taken to protect the strands from corrosion in the area of fixation.

Places containing exposed sections of strands are filled with protective material supplied under pressure. In this case, voids may occur in the filled volume, and in case of water ingress, corrosion of the metal strands may begin.

In the known device for protecting the end sections of wire twisted reinforcement strands from corrosion, at least one chamber is made into which a sealing lubricant is introduced under pressure.

The disadvantage of this device is the complexity of the installation design and the inconvenience of extracting lubricant during repair work.

Another disadvantage of this device is the implementation of the base plate in the form of a ring. Due to the fact that in modern anchor devices a large number of strands are simultaneously pulled, large specific loads act on the support ring, and therefore it is necessary to increase the dimensions of this element.

The result, to which this technical solution is directed, is to increase the reliability of the corrosion protection of the device while simplifying the design.

This result is achieved due to the fact that in the anchor device consisting of reinforcing beams containing twisted wire reinforcing strands, located, with the exception of the end sections, in the protective shells filled with grease, and anchors, each of which contains a base plate, an anchor yoke made with coaxial cylindrical channels and conical recesses, wedge clamps located in conical recesses in which end sections of reinforcing strands are placed, each base plate is made in the form of a disk with of cylindrical channels, coaxial with the respective channels of the anchor clamps, which are arranged to seal the membrane anchor strands. The end sections of the cylindrical channels of the anchor ring are made with cylindrical bores coaxial with the channels of the base plate, in which the ends of the shells of the corresponding reinforcing strands are placed with the possibility of interaction with their end part. Each end of the shell, the ends of the wedge clamps, the cylindrical channel and the end section of the reinforcing strand form a sealed chamber filled with grease.

An example of the implementation of the inventive device is illustrated by drawings, where in FIG. 1 shows an anchor device, FIG. 2 - place A.

An anchor device consists of reinforcing beams 1 containing twisted wire reinforcing strands 2 and placed, with the exception of end sections 3, in protective shells 4 filled with grease, and anchors 5, each of which contains a base plate 6, an anchor sleeve 7, made with coaxial cylindrical channels 8 and conical recesses 9, in which the wedge clamps 10 are located.

The end sections 3 of the reinforcing strands 2 are placed in the wedge clamps 10.

Each base plate 6 is made in the form of a disk with cylindrical channels 11, coaxial with the corresponding channels 8 of the anchor cage, in which the protective shells 4 of the anchor strands are placed with the possibility of sealing. Sealing is carried out using grease.

The end sections of the cylindrical channels of the anchor ring are made with cylindrical bores 12, coaxial with the channels 11 of the base plate, in which the ends 13 of the shells of the corresponding reinforcing strands are placed with the possibility of interaction with their end part.

Each end face 13 of the shell, the ends 14 of the wedge clamps 10, the cylindrical channel 8 and the end section 3 of the reinforcing strands form a sealed chamber 15 filled with grease.

The sections of reinforcing strands above the wedge clamps 10 are protected by covers 16 and a protective glass 17.

When the reinforcing beams are tensioned, an excess pressure is created in their shell and a part of the lubricant is squeezed out into the chamber 15, creating an excess pressure in it, due to which the lubricant fills all voids in the wedge clamps, cylindrical and wedge undercuts, sealing them and protecting against corrosion.

Due to the fact that each base plate is made in the form of a disk with cylindrical channels coaxial with the corresponding channels of the anchor ring, lower specific loads act on the base plate, which allows to reduce the dimensions of this element.

Such a constructive implementation of the device will allow:

- simplify and improve the reliability of corrosion protection;

- facilitate the repair work of the anchor device;

- reduce the size and increase the reliability of the base plate.

Information sources

1. RF patent No. 2566882, MKI E04C 5/12, 2011.

Claims (1)

An anchor device consisting of reinforcing beams containing twisted wire reinforcing strands, located, with the exception of the end sections, in the protective shells filled with grease, and anchors, each of which contains a base plate, an anchor clip made with coaxial cylindrical channels and conical recesses located in conical undercuts wedge clamps in which the end sections of the reinforcing strands are located, characterized in that each base plate is made in the form of a disk with cylindrical channels, coax with the corresponding channels of the anchor cage, in which the shells of the anchor strands are sealed with the possibility of sealing, the end sections of the cylindrical channels of the anchor cage are made with cylindrical bores coaxial with the channels of the base plate, in which the ends of the shells of the corresponding reinforcing strands are arranged to interact with their end part, moreover, each end of the shell, the ends of the wedge clamps, the cylindrical channel and the end section of the reinforcing strands form a sealed chamber filled with grease.

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