SU947323A1 - Butt joint of prefabricated ferroconcrete columns - Google Patents

Description

The invention relates to the construction, namely, to the structures of the joints of prefabricated reinforced concrete columns of buildings and structures.

Known butt connection of precast concrete columns using metal ties and a composite centering strip made in the form of two identical round disks of a wedge-shaped

The disadvantage of this connection is the complexity of installation.

The closest to the proposed structural features is the butt connection of prefabricated reinforced concrete * columns, including ends> columns, angular and intermediate outlets interconnected by coupling elements located in the monolithic grooves P].

A disadvantage of the known compound is the uneven transfer of forces from the overlying column to the underlying.

. The purpose of the invention is to ensure uniform transfer of effort from the overlying columns to the underlying and simplified installation.

This goal is achieved in that the butt joint of the prefabricated jelly concrete columns, including the ends of the columns, interconnected angular and προς interlocking outlets, located in the monolithic grooves, is provided with a centering gasket located between the ends of the columns and made in; in the form of a closed cavity eapolnennoy quick-hardening solution.

Figure 1 shows the butt joint ·! · Elongation of precast concrete columns, general view; figure 2 is a section aa in figure 1.

The butt joint of prefabricated jellies 15 reinforced concrete columns 1 And 2 includes the ends 3 of the abutting elements, made with recesses to accommodate the centering gasket 4, and the intermediate + intermediate releases of the reinforcement 5, jointed between them by bath-seam welding B. Four pairs of outlets of the angular reinforcement 7, located on. diametrically opposite sides, have heads 8, on which svF25 tightly worn coupling elements in the form of glass tubes 9 and tightening couplings 10.

The centering gasket 4 is made of non-sheet material, for example?

An example of steel is in the form of a closed strip 3 and is filled with quick-hardening mortar 11, for example, cement, with the addition of a hardening accelerator. The most effective hardening accelerator is Sase ^ calcium chloride, the introduction of which leads to an increase in the strength of the solution, regardless of which cement the solution is prepared on. The solution 11 is fed into the cavity 4 through the pipe 12 with the plug 13.

At the locations of the outlets 10 of the reinforcement 5 and 7, an annular groove 14 is made, facing the broadened side into the body of the connected columns 1 and 2. The groove 14 is filled with mortar 15 on expanding cement. fifteen

Installation of columns is as follows.

A centering gasket 4 filled with quick-hardening mortar 11 is placed on the lower column 2 in the recess. Then, the upper column 1 is mounted on the gasket 4 and, first of all, the outlets, fittings 7 are connected with the help of stopper tubes 9 and tightening couplings 10, screwed - 25 waving them into each other with a wrench. After connecting four pairs of outlets, angular reinforcement 7 to each other and aligning the column 1 along the alignment axes ι of the building, the crane hook of the load-lifting mechanism is released and the column 1 can freely stand without support. After the solution 11 has solidified in the centering gasket 4, the other intermediate releases of the 5 by means of bath-seam welding 6. When welding intermediate releases of reinforcement 5, they are heated to each other, and then when cooling is shortened, as a result of which concrete surfaces to be joined * 0 columns We 1 and 2 tightly compress the centering gasket 4, thereby creating good conditions for uniform transmission of effort.

To protect the releases of the reinforcement 5 and 7 · from corrosion, the annular groove 14 is filled with a solution of 15 on expanding cement. Expanding during hardening, the solution 15 tightly fills the groove 14.

The practical use of the invention allows, in comparison with the known device, to simplify the installation of columns and to ensure uniform transfer of forces from the overlying column to the lower one due to the snug fit of the ends of the columns to the centering pad filled with quick-hardening solution.

Claims (2)

and filled with quick-hardening solution 11, for example, cement, with the addition of a hardening accelerator. The most effective accelerator of hardening is calcium chloride Cacase, which leads to an increase in the strength of the solution regardless of which cement the solution is prepared. The solution 11 is fed into the cavity 4 through the pipe 12 with the stopper 13. There are an annular a groove 14 facing the broadened side into the body of the joined columns 1 and 2. The groove 14 is filled with a solution 15 on the expanding cement. The installation of the columns is as follows. A centering gasket 4 filled with fast-hardening solution 11 is placed on the lower column 2 into the recess. Then the upper column 1 is installed on the gasket 4 and, first of all, the outlets of the reinforcement 7 are fastened to the gasket 4 and the sleeves 10, screwing them into each other with a wrench. After connecting four pairs of outlet angular fittings 7 to each other and alignment of the column 1 along the center axis of the building, the hook of the crane of the load-lifting hanger is released and column 1 can stand without support again. The solution 11 in the centering pad 4 is connected to each other. releases of the reinforcement 5 using bath seam welding 6. When welding the intermediate outlets of the reinforcement 5, they heat up between them, and then during cooling they shorten, as a result of which the joined concrete surfaces of the column 1 and 2 tightly compresses the centering gasket 4, thereby creating good conditions for uniform transfer of forces. In order to protect the valve outlets 5 and 7 from corrosion, the annular groove 14 is filled with a solution 15 on the expanding cement. Expanding upon hardening, the solution 15 fills the groove 14 tightly. The use of the invention in practice allows, in comparison with the known device, to simplify the installation of columns and to ensure uniform transfer of forces from the overlying column to the underlying column due to the close fitting of the column ends to the centering pad filled with quick-hardening solution . Claims of the Invention Joint connection of precast concrete columns, including the ends of the columns, interconnected with STEY5NHYH elements angular and intermediate releases, located in zamonolichivaemyh grooves, characterized by; the purpose of uniform transfer of forces from the overlying column to the underlying one and to simplify installation, the connection is equipped with a centering gasket located between the ends of the columns and made in the form of a closed cavity filled with a quick-hardening solution. Sources of information taken into account in the examination 1. Copyright witness of the USSR 209689, cl. E 04 C 3/30, 1964. 2. USSR author's certificate 771269, cl. E 04 B 1/38, 1977.