RU2471931C1 - Method to arrange joint units "column-crossbars-column" - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method to arrange joint units includes installation of lower columns, crossbars, ceiling slabs, upper columns and monolithing of column joints with crossbars and upper areas of crossbars. Lower and upper columns are columns of floor sectioning with holes in upper ends and reinforcement rods in lower ends. A conductor is fixed at the end of each column prior to assembly. The conductor forms between its body plane and the upper end of the column a space for a monolithic node joint and a hole for reinforcement rods in a finished joint. Precast crossbars are installed at the ends of columns, providing for contact of double-sided slopes of their support ends with setting columns of conductors. Monolithing of column joints with crossbars and upper areas of crossbars is carried out prior to removal of conductors from ends of lower columns. Conductors are removed from columns after formation of an initial structure of concrete in a ceiling. Upper columns are installed after concrete gains design strength, connecting them with the lower ones by means of a plug joint.

EFFECT: reduced metal intensity, higher accuracy of performance, liquidation of welding and forming works on a construction site.

5 dwg

Description

The invention relates to the field of construction, namely the construction of reinforced concrete frames of buildings, and can be used in the construction of residential, public and administrative buildings.

Known reinforced concrete frame of a building with precast monolithic crossbars according to the patent RU 2357049. According to the design of the known frame of the building, the following method of execution of the butt assemblies of the column-crossbar-column, adopted for the prototype:

- install columns of the lower floor, equipped in the upper end with threaded reinforcing outlets with quotation nuts;

- in the longitudinal and transverse directions, prefabricated monolithic crossbars are installed on the columns;

- on the crossbars install floor slabs;

- on the quotation nuts of the reinforcing outlets of the lower columns, upper long-length columns are installed, in the ends of which and in the metal embedded sheets attached to the ends, the holes for the reinforcing outlets are made;

- with the help of quotation nuts regulate the location of the columns and their ends, forming a space for a monolithic nodal connection (concrete gaps);

- monolithic with concrete the joints of the columns with the crossbars and the upper zones of the precast monolithic crossbars.

The known method has the following disadvantages:

- increased metal consumption of the connection nodes due to the installation on the lower ends of the upper columns of metal sheets with embedded parts and quotation nuts on the reinforcing outlets of the lower columns;

- insufficient accuracy of installation of precast monolithic crossbars along the axes of the building frame;

- insufficient accuracy of vertical installation of long upper columns, due to the fact that with an increase in their length, the degree of deviation from the vertical at the upper elevations of the columns increases significantly.

The technical result of the invention is aimed at eliminating the disadvantages of the prototype, namely:

- to reduce the metal consumption of the butt nodes;

- to improve the accuracy of the dimensions of the building frame;

- the elimination of welding and formwork at the construction site.

The technical result is achieved by the fact that in the method of making butt joints “Column-crossbars-column”, including installation of lower columns, installation of precast monolithic crossbars on columns, installation of floor slabs on the crossbars, installation of upper columns, monoling of the joints of columns with crossbars and upper zones crossbars according to the invention, floor and bottom columns are used as lower and upper columns with holes in the upper ends and reinforcing outlets in the lower ends, a conductor is attached to the end of each column before installation OR, forming between its housing plane and the upper end of the column a space for a monolithic nodal connection and holes for reinforcing outlets in the finished connection, prefabricated monolithic crossbars are installed on the ends of the columns, providing contact between the double bevels of their supporting ends with the mounting columns of the conductors, monoling the joints of the columns with crossbars and the upper zones of the crossbars are produced before the conductors are removed from the ends of the lower columns, the conductors are removed from the columns after the formation of the initial concrete structure in the ceiling and, the upper columns are installed after the concrete has set design strength, connecting them to the lower ones by means of a plug joint.

The use of floor cuts as the lower and upper columns increases the accuracy of their vertical installation, helping to increase the accuracy of the dimensions of the building frame.

Attaching a conductor mounting piece for the crossbar to the end of each column allows to increase the accuracy of the installation of prefabricated monolithic crossbars along the building axes, create a space for monolithic nodal joints (concrete gaps) and make holes in the joints for reinforcing outlets of the upper columns. This simplifies and cheapens the construction of reinforced concrete frame, and also improves the accuracy of its dimensions.

Installing the upper columns directly on the finished butt joints eliminates the need for quotation nuts and supplying the lower ends of the upper columns with metal sheets with embedded parts, which reduces the metal consumption of the nodal joints. The use of conductors for the installation of butt assemblies does not increase their metal consumption, since conductors are standard removable reusable mounting devices.

The proposed method for performing butt joints eliminates the need for welding and formwork at a construction site.

The invention is illustrated by drawings.

Fig. 1 shows the finished butt joint “Column-crossbars-column”.

Figure 2 shows the column-crossbar connection unit after concreting.

Figure 3 shows the installation of the mounting conductor on the upper end of the lower column.

Figure 4 shows the column-crossbar connection unit before concreting.

Figure 5 shows view A in figure 4.

The method of execution of the butt nodes "Column-crossbars-column" is as follows:

- at the ends of the lower columns 1 floor cuts with holes 2 and embedded threaded bushings 3 are fixed using rods 4 conductors 5, while the columns 6 of conductors 5 are installed in the holes 2 of the columns 1;

- install the lower columns 1 with conductors 5 fixed on them along the axes of the building frame;

- prefabricated monolithic crossbars 7 are installed on the ends of the columns 1, placing their supporting ends in the space formed between the housing planes 8 of the conductors 5 and the upper ends of the lower columns 1, providing contact between the two bevels 9 of the supporting ends of the crossbars 7 with the installation columns 6 of the conductors 5;

- set on the crossbars 7 floor slabs;

- monolith the joints of the lower columns 1 with crossbars 7 and the upper zones of the crossbars;

- after the initial structure of the concrete is formed, conductors 5 are removed, while holes 11 for reinforcing outlets 12 of the upper columns 13 are formed in the connection;

- after the concrete has set design strength, the upper columns 13 are installed on the butt assemblies, connecting them to the lower columns 1 by means of a plug joint.

Claims (1)

The method of implementation of the butt nodes "Column-crossbars-column", including the installation of lower columns, installation on columns of prefabricated monolithic crossbars, installation of floor slabs on the crossbars, installation of upper columns, monoling the joints of columns with crossbars and upper zones of the crossbars, characterized in that floor and bottom columns are used as floor cut columns with holes in the upper ends and reinforcing outlets in the lower ends, before the installation, a conductor is formed on the end of each column, forming between its body plane and with the upper end of the column, space for a monolithic nodal connection and holes for reinforcing outlets in the finished connection, prefabricated monolithic crossbars are installed on the ends of the columns, ensuring the contact of the two-sided bevels of their supporting ends with the mounting columns of conductors, the joints of the columns with the crossbars and the upper zones of the crossbars are monitored to removal of conductors from the ends of the lower columns, conductors are removed from the columns after the formation of the initial structure of concrete in the ceiling, the upper columns are installed after recruitment ETOH design strength, connecting them with the bottom by means of a plug joint.

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