DE612531C - Reinforced concrete column with longitudinal and transverse reinforcement and a high-pressure-resistant core - Google Patents

Description

Reinforced concrete column with longitudinal and transverse reinforcement and a high-pressure-resistant core The invention relates to an iron-reinforced concrete column with a high-pressure core and aims at a better and more economical production of such columns than before was possible.

The high pressure resistant core is generally achieved through use of low-water concrete when assembled according to certain principles and practices Aggregates to cement the mix. This concrete must be under high ramming or Pressing pressure are introduced, while the highly plastic concrete as a result ample Water additive is of a flowable nature. The latter can therefore be converted into a corresponding outer formwork can be poured in, with spreading tamping or poking to prevent the formation of harmful cavities.

The compressive strength of such a product resulted from highly plastic mixtures Concrete is relatively low; the consequence of this are large column cross-sections, so that the reinforced concrete column of such manufacture is not opposite to the egg-skeleton structure was more competitive. In contrast, columns with a high-pressure-resistant concrete core offer because of the approximately twice higher compressive strength of the noble concrete to significantly reduce the column cross-sections and thus to greater usability, if, in addition, an economical production method sought and achieved by the invention is made possible.

Reinforced concrete columns with a core made of high-pressure concrete are nice known. In these column-like structures with a high-pressure-resistant concrete core the mixture is pressed under high pressure into sleeves made of unperforated sheet steel; these Construction excludes the 1 -, instunity of the column; the longitudinal reinforcement of this The column is placed on the outside of the sleeve surrounding the core and in an outer, subsequently Applied shell embedded in concrete or cement: one also has to manufacture from reinforced concrete columns to the column core. Enveloping sheet metal jackets made of perforated sheet metal used, arranged individual longitudinal bars within the sheet metal jacket and into them Reinforcement consisting of a core mantle and inner longitudinal iron rammed into concrete. Also the use of core sheaths made of expanded metal or wire mesh and of openwork, metal, tubular core sheaths with internal spiral lacing is known. In these known reinforced concrete columns, however, the core does not consist of high-pressure concrete. Its share in the transfer of those acting on the pillar Load is only small in accordance with its relatively low compressive strength. A reduction in the cross section of the column due to the compressive strength the core is not accessible.

In contrast, the invention consists in that the core sheath when used a high-pressure concrete core is perforated, z. B. from a dense wire mesh or from expanded metal o. The like. Is formed and between the ring and spiral constriction is arranged. The transverse reinforcement in Shape of a Ring or spiral lacing becomes the openwork The core mantle is reinforced in such a way that the concrete mix poured in is tamped down in layers, in particular earth-moist concrete, unhindered by the vertical iron bars the longitudinal reinforcement within the core jacket under high ramming or pressing pressure can take place.

The drawing shows an embodiment of the invention, and although Fig. z is a view of a reinforcement provided with the invention Reinforced concrete column with longitudinal section of some parts; Fig. 2 is a horizontal section through the pillar.

As is known per se, an outer shell should be around the core a of the column b, which is discussed in more detail below ". The core a contains embedded the vertical bars c of the longitudinal reinforcement; the transverse reinforcement in the form of the wire wrapping d encloses the perforated core sheath e, in turn enveloped by the mass of the outer shell b. The core sheath e is expediently every now and then with the bars c of the longitudinal reinforcement by wire loops or others Lanyard connected.

In the inner cavity of the core shell e, which contains the vertical rods c, the concrete mixture of the type described above is poured in layers and each layer is tamped or pressed as tightly as possible. The bars c passing straight through do not prevent this stamping or pressing in any way; they are tamped around and firmly enclosed by the mixture. After the high-pressure-resistant core a has been completed, the shell b is produced. Since it is mainly the core concrete of the column that has a static effect, it is sufficient that it is made of high-pressure-resistant concrete. The shell b, on the other hand, can also be made from a different mixture, e.g. B. from cast concrete using formwork f, which is removed after completion. If the outer shell b is made of Torkret concrete, no shell f needs to be used.

Claims (1)

PATENT CLAIM: Reinforced concrete column with longitudinal and transverse reinforcement and high-pressure resistant Core made using a tubular that also serves as formwork metallic core jacket is produced, characterized in that the tubular Kernmantel is perforated, consists of dense wire mesh, expanded metal or the like, and arranged between the longitudinal reinforcement and the ring or spiral strapping is.