SU122275A1 - Device for the formation of channels in concrete and reinforced concrete structures - Google Patents

Description

The invention relates to devices for forming channels in concrete and reinforced concrete structures, mainly for laying reinforcement in them and then tensioning it, consisting of a flexible tube and a rigid core, laid into a form or formwork before beaming and subsequently removed from the structure after curing. concrete.

Such devices in the form of a rubber tube and a rigid core inserted into it, extracted successively after the concrete has been drilled, require the use of a large force on the extraction of the tube and low turnover due to its rapid wear.

In the proposed device, these drawbacks are eliminated.

This is achieved by performing a flexible tube woven from thin wire.

Ma FIG. 1 shows an exemplary arrangement for flexible tubing in a concrete product to form channels; in fig. 2-part flexible tube with a core; in fig. 3 is a schematic of a device for extracting a core from a product after the concrete has hardened.

A device for forming channels in concrete and reinforced concrete structures consists of a flexible tube / woven from thin wire and a rigid core inserted into it, one tube 2, placed in a form or formwork in places of future arrangements of reinforcing beams and fixed by known methods in project position. Due to the fact that a tube woven from a thin wire, when a slight longitudinal force is applied to it, dramatically reduces its diameter, it is easily removed from the products after the concrete has cured. Owing to its great strength, it has multiple turnarounds and wears little.