RU2002913C1 - Detachable joint for high strength steel wire bandle - Google Patents

Abstract

-Use: in construction in the manufacture of prestressed concrete. SUMMARY OF THE INVENTION: The detachable joint of high-strength wire bundles includes a support member for the bundle remaining in the concrete of the structure, the joint being provided with a sling element with a hole and a pin, one end of which is fixed in the recess of the support element and the other is placed in the opening of the sling element, provided with a loop - the spherical ends of the wire of the extracted bundle are fixed on both sides by a pin in the girth of the sling element. The sling element can be made of rolled steel with a full coverage of the opera element, or along with the support element, or from a short loop-shaped bundle of high-strength wires. In addition, external longitudinal slots with recesses for the upset heads of the beam wires remaining in the beam can be made on the support element. concrete 4 zp f-ly, 8 ill.

Description

The invention relates to construction, in particular to the production of prestressed concrete.

A joint of bundles of high-strength wire is known, consisting of a cage with a conical hole and a wedge into which a connecting element is screwed with wires of another bundle attached to it.

A disadvantage of the known device is the inseparability after tensioning the beam.

A junction of high-strength wire bundles is known, in which the lethal end of one bundle is anchored with a segment (support element) containing conical holes for wedging the ends of the wires of another bundle.

A disadvantage of the known device is the inefficiency of the joint after tension, which does not allow reuse of the end parts of the bundle, as well as the impossibility of attaching wires with upset heads, which reduces the functionality of the joint,

The aim of the invention is to reuse the ends of the beam and expand the functionality.

This goal is achieved in that the joint of the high-strength wire bundles, including the support element for the beam remaining in the concrete structures, is equipped with a sling element with a hole and a pin, one end of which is fixed in the recess of the support element, and the other is placed in the opening of the sling element, the loop-shaped ends of the wire of the extracted bundle are fixed on both sides by a pin in the girth of the sling element.

In addition, the sling element can be made of rolled steel with full coverage of the support element, either along with the support element, or from a short loop-shaped bundle of high-strength wires.

In addition, external longitudinal slots with recesses for upset heads of bundle wires remaining in the concrete can be made on the support element.

Figure 1 shows a detachable joint with a sling loop of round steel, General view; figure 2 is a section aa in figure 1; in Fig.3 is a General view of the detachable joint with a sling loop, made integral with the supporting element; figure 4 is a section aa in fig.Z; figure 5 is a General view of a detachable joint with a sling loop in the form of a loop-shaped bundle of high-strength wire; Fig.6 is a section aa in Fig.5;

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Fig. 7 is a detachable joint in which the wires of the beam remaining in the concrete have upset heads; Fig.8 is a section bB in Fig.7.

The detachable joint of the high-strength wire bundles contains a support element 1 with end parts m 2, in which looped wire 3 of the bundle, remaining in concrete, divided in two, is located. With the support element 1, a sling loop 4 is connected with an opening 5 for a longitudinally arranged pin b, one end of which is inserted into the recess 7 of the supporting element 1, and the other has an opening for fastening the cable pulling the pin 8. For the pin b, the girth on both sides the loop-shaped wires of the bundle 9 are equally fixed, which is removed after tensioning and hardening of the concrete.

The joint is made with a sling element of rolled steel of a round or other profile with full coverage of the supporting element 1 or at the same time with it. The sling element is also made of a short loop-shaped bundle of high-strength wires (see Fig. 5).

In a junction in which the wires remaining in the beam of concrete have upset heads (see Figs. 7, 8), the support element 1 has slots 10 for wires 3 with upset heads 11 inserted into cylindrical recesses and pressed by covers 12. The removed bundle located in the channel former 13.

The operation of the detachable joint is as follows.

The loop-shaped wires 3 of the bundle are divided in two and the loops are put on the support element 1 with a sling loop 4. The loop-like wires of the removable bundle 9 are divided in two and are inserted into the sling loop on both sides. The pin b is inserted into the opening of the sling loop, passed between the loops of the beam 9 and fixed in the recess 7 on the support element 1. After tensioning the beam, the structure is concreted, and after the concrete has hardened, the end sections of the beam are de-stressed. The cable b is removed by cable 8 and the ends of the bundles 9 are removed for reuse. At the junction in which the wires of the beam remaining in the concrete have upset heads, the ends of the wires are passed into the slots of the support element, the upset heads are placed in cylindrical recesses and pressed by covers 12.

The attachment to the joint of the removable beam is identical to the above.

The use of this joint will make it possible to repeatedly use the end sections of the beams, in addition, the functionality of the joint is expanded.

(56) French Application No. 2347504, cl. E 04 C 5/12, 1977.

UK Application No. 1441796, cl. E 04 C 5/12, F 16 G 11/04, 1976.

Claims (5)

1. REMOVABLE JOINT OF BEAMS OF HIGH-STRENGTH WIRE, including a support element for the beam remaining in the concrete of the structure, characterized in that. in order to reuse the end parts of the beam and expand the functionality, the joint is equipped with a sling element with a hole and a pin, one end of which is fixed in the recess of the support element, and the other is placed in the hole of the sling element, provided with loop-shaped ends of the microwire the extracted beam is secured from two sides for a check in the girth of the sling element. (, ... c. 4 --- L 2 2. The joint of the beams according to claim 1, characterized in that the sling element is made from rolled steel with full coverage of the support element. 3. The joint of the beams according to claim 1, characterized in that the sling element is made integral with the support element. 4. The bundle joint according to claim 1, characterized in that. that the sling element is made of a short loop-shaped bundle of high-strength wires. 5. The joint of the beams according to claims 1 to 4, characterized in that external longitudinal slots with recesses for planted voices are made on the support element beam wires remaining in concrete. L plGG / /. dSfiSx s / vXAiCV / $ Th§ | h H  - 9 FIG. 7 Fig a FIG. 5 -V AJ  I I u, i sjx, j. x i / V  I / l / -, 1 ro oh oh che to  I CO 1 eleven