RU2099488C1 - Method of production of columns - Google Patents

Abstract

FIELD: production of columns for underground railway stations. SUBSTANCE: the column has a metal pipe with a concrete core inside it and a separating layer between them. The metal pipe is installed vertically, a bag of polymeric film is lowered inside the pipe the upper part of the bag is fastened on the upper end of the pipe, the pipe space is filled with concrete mix. EFFECT: enhanced reliability. 2 cl, 2 dwg

Description

 The invention relates to methods for manufacturing structures of building elements, in particular to methods for manufacturing columns that can be used for the construction of subway stations.

 A known method of manufacturing a column, which consists in installing a metal pipe vertically and filling it with concrete mixture (see the proceedings of the All-Union Scientific Research Institute of Transport Construction "Study of concrete and reinforced concrete structures of transport structures" edited by O.Ya. Berg, M. " Transzheldorizdat ", 1960 p. 120-121).

 The technical result of the invention saving metal by increasing the bearing capacity of the column by eliminating friction between the concrete core and the pipe.

 To achieve the specified technical result in the method of manufacturing the column, which consists in installing a metal pipe vertically and filling it with concrete mixture, before filling the pipe with concrete mixture inside, lower the bag from the polymer film, fix the upper part of the bag on the upper end of the pipe, and fill the pipe concrete mixture is produced by feeding it into a bag.

 In addition, the concrete mixture is compacted layer by layer, and before vertical installation of the pipe, the bottom end placed is closed with a plug.

 In FIG. 1 shows a column in longitudinal section. In FIG. 2 same, top view.

 The column contains a metal pipe 1, inside of which there is a concrete core 2. Between the pipe 1 and the core 2 there is a separation layer formed by at least one layer of polymer film 3, which creates the best conditions for reducing friction between the wall of the pipe 1 and the concrete core 2.

 The column is made as follows.

 The metal pipe 1 is installed vertically, a bag of polymer film 3 is lowered inside the pipe 1, the upper part of the bag is fixed at the upper end of the pipe and concrete mixture is fed into the bag, filling the cavity of pipe 1. Instead of the bag, you can use a cylindrical shell made of polymer film, the lower part of which sealed, or has a bottom. The bag or casing may be formed from a single or double layer polymer film. In the process of filling the pipe 1 with concrete mixture, it is possible to layer-by-layer consolidation of this mixture in various ways, depending on the brand of concrete. In addition, placed at the bottom of a vertical installation, the end of the pipe 1 is closed with a metal plug 4, welding it around the perimeter to the pipe.

 The positive effect of the proposed pipe-concrete columns and the method of its manufacture is confirmed experimentally and consists in increasing its bearing capacity by 25-50%, depending on the strength of the concrete core.

Claims (2)

 1. A method of manufacturing a column, which consists in installing a metal pipe vertically and filling it with concrete mixture, characterized in that before the vertical installation of the pipe, its lower end is closed with a plug, and before filling the pipe with concrete mixture, a bag of polymer film is lowered at the upper end of the pipe fix the upper part of the bag, and filling the pipe with concrete mixture is carried out by feeding it into the bag.  2. The method according to claim 1, characterized in that the concrete mixture is compacted layer by layer.

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