SU1564302A1 - Method of manufacturing reinforcing cage - Google Patents

Abstract

The invention relates to methods for manufacturing reinforcing cages of reinforced concrete products such as contact network supports that are molded by centrifuging and reduces the labor intensity of manufacturing. For the manufacture of the reinforcement cage, a wire helix 1 is prefabricated, part of the turns of which is rigidly fastened with rods 2 arranged along it. Anchoring washers 3 are installed on the assembly stand, in the upper halves of which part of the longitudinal reinforcement 4 is fixed and in the cavity between the reinforcement 4 stack helix 1, pre-compressed its loose coils. Then the remaining part of the reinforcement 4 is secured in the washers 3 and its tension is applied. 1 hp f-ly, 4 ill.

Description

1

3

The invention relates to methods for manufacturing reinforcing cages of reinforced concrete products such as contact network supports that are molded by centrifuging.

The purpose of the invention is to reduce the labor intensity of manufacture.

FIG. 1 shows the reinforcement cage of d / r tension of the longitudinal reinforcement, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a diagram of the framework for the longitudinal reinforcement; in fig. 4 - the same, after its tension.

For the manufacture of the reinforcement cage, a wire helix 1 is prefabricated, part of the turns of which is rigidly fastened with rods 2 arranged along it. On the assembly stand, anchor washers 3 are installed, in the upper halves of which part of the longitudinal reinforcement 4 is fixed. and a wire helix is inserted into the cavity between the armature 4, having previously squeezed its loose coils. Then, the remaining part of the reinforcement 4 is fixed in the washers and its tension is produced by moving one of the washers 3. At the same time, the loose turns of the helix 1 are unclenched until their design pitch is reached, and the reinforcement 4 compresses the helix 1, eliminating its displacement when concreting. To obtain a uniform pitch of the helix in the reinforcement cage after tensioning the longitudinal reinforcement, the length of the section of helix 1 with loose turns is determined from the ratio LL

L where L is the length of the wire section

spirals with loose coils;

and L is the elongation of the longitudinal reinforcement during tension; t is the helix pitch; d - wire diameter.

|

The invention of spats reduces the laboriousness of manufacturing the reinforcement cage by eliminating the need to wind the wire helix onto the longitudinal reinforcement, since the coil can be prefabricated in the reinforcement workshop, and no special equipment is required to install it in the framework.

Claims (2)

1. A method of manufacturing a reinforcement cage, including securing the longitudinal reinforcement in anchor washers, manufacturing a wire helix and stretching the longitudinal reinforcement by moving one of the anchor washers, characterized in that, in order to reduce the labor intensity of manufacture, some of the turns of the wire helix are rigidly attached to rods along it, and part of the longitudinal reinforcement is fixed in the upper halves of the anchor washers, which are then turned 180 ° and wire is placed into the cavity between the longitudinal reinforcement helix, having preliminarily squeezed its loose coils, after which the remaining part of the longitudinal reinforcement is fixed in the anchor washers and is tensioned. 2. Method according to claim, characterized in that the length of the section of the wire helix with loose turns is determined from the ratio. - 4.L t with - d L de L dL t - d is the length of the section of the wire helix with loose turns; elongation of the longitudinal reinforcement under tension; spiral pitch; helix wire diameter. 1564302 Aa V v v v v v vw phage 2 t figs figl