RU2442867C1 - Device for reinforcing bearing frame - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: the invention relates to construction, in particular, to device for reinforcing bearing frame. The device for reinforcing bearing frame comprises a metal holder installed on the bearing frame. The holder is clasped axially by holding gear and fixed to support elements. The holder is clasped by at least two hydraulic jacks. The jacks rest through distribution devices on lower support elements installed in bedding course. The jacks interact by their upper part with a mountable arch attached to the holder. The arch is made from two symmetrically positioned support channels. The channels are connected with each other by screws with the possibility to thrust against cross-bars of the holder and to stand on jacks installed under the support channels.

EFFECT: reduced materials consumption, reduced labour intensity.

3 cl, 5 dwg

Description

The invention relates to the field of construction and can be used to strengthen the supporting structures of columns, piers and brick pillars.

A device for reinforcing a reinforced concrete column is known, including a prestressed metal cage with a tensioning device connected to plate blocks framing the cantilever part of the column, the tensioning device is made in the form of an upper movable and lower fixed frame of the column connected to the upper part of the metal cage, interconnected by a spacer while the stationary frame is pivotally connected to the block pads by means of struts, and the movable frame the link is pivotally connected to the struts by means of rods (USSR Author's Certificate No. 1399435, priority date 10/15/1985, publication date 05/30/1988, authors I.F. Bush and B.A. Garagash, RU).

A disadvantage of the known device is the limited scope, which is due to its use to strengthen columns with a capital or with console parts, and high material consumption.

A device is also known for reinforcing compressed reinforced concrete elements, mainly columns of operating buildings, containing a spatial reinforcing cage with pre-stressed compressed reinforcing elements, while the reinforcing cage is formed by U-shaped half-frames, the compressed reinforcing elements of which are made of flexible rods, and the pressing fixture made in the form of pivotally connected removable shields with guides for fixing reinforcing bars (Authors certificate of the USSR №1189975, priority date 03.02.1984, publication date 07.11.1985, the authors V.F.Zaharov etc.).

The disadvantages of the known device are the limited scope, mainly for columns, and increased labor costs when reinforcing columns associated with the use of pivotally connected removable shields to press the reinforcing elements of the spatial frame to the column, as well as fixing reinforcing half frames using welding.

As a prototype, the device used in the known method of reinforcing columns containing a metal clip mounted on a column of vertical corner elements connected by transverse bars, compressed in the longitudinal direction by a spacer device and rigidly connected to the structures supported on the column, is used as a spacer device as a prototype. a tension screw with a nut mounted on a table welded to the holder and interacting during compression with a stop element fixed in the upper part and clips (USSR Author's Certificate No. 607932, priority date 02/07/1977, publication date 05/25/1978, author V.V. Guselnikov, prototype).

The disadvantages of the prototype are, firstly, the limited area of use, due to the use only for columns, which have in the upper part a horizontal bearing surface for the thrust elements of the cage, and secondly, the high complexity associated with fastening and dismantling the spacer device, as well as high material consumption due to the fact that after creating prestress in the structure of the clip, a welded-on table of the spacer device remains.

The objective of the invention is to expand the field of use of a device for strengthening load-bearing structures, including walls, brick columns, columns having consoles with inclined faces in the upper part that serve as stops for clips, as well as reducing material consumption and laboriousness when used due to a more rational spacer design devices.

To solve the problem in a device for reinforcing load-bearing structures, including a metal clip mounted on a load-bearing structure, compressed in the longitudinal direction by a spacer device and rigidly connected to thrust elements, according to the invention, the metal clip is compressed by at least two hydraulic jacks supported through switchgears on the lower stop elements installed on the mortar layer and the interacting upper part with the assembly tr an obverse made of two symmetrically located supporting channels, interconnected by bolted connections with the possibility of abutment against the transverse strips of the cage and resting on the said jacks installed under the channels of the beam.

According to the invention, the transverse planks of the metal cage adjacent to the planks, which are the stop for the channel beams, are elongated with the ends protruding beyond the edges of the cage, which are additional stops for the said channels.

According to the invention, the upper part of the metal cage can be branched.

Figure 1 schematically shows a device for reinforcing bearing structures with a horizontal supporting surface of the thrust elements, General view; figure 2 is a section aa in figure 1; figure 3 - node I in figure 1; figure 4 - node II in figure 2; figure 5 schematically shows a device for strengthening load-bearing structures with an inclined bearing surface of the cage, General view.

The device for reinforcing the load-bearing structures comprises a metal cage 2 installed on the column 1, made of vertical elements of the corner profile 3, interconnected by transverse bars 4. To create a prestress in the metal cage, two hydraulic jacks 5 are installed at the bottom of the device and mounted on a metal clip, a pre-assembled traverse 6 made of two symmetrically located supporting channels 7, interconnected by bolted joints 8 with zhnosti way into the cross-bars cage 4 and bearing on the hydraulic jacks 5, equipped with clamps efforts. In this case, the jacks 5 are installed under the reinforced ribs of the supporting channels 7, with their support through the switchgear 9 on the lower thrust elements 10, which are installed before compression on a layer of cement-sand mortar. The transverse laths 11 of the metal cage 2 adjacent to the laths 4, which are the stop for the channels of the beam 6, are made, if necessary, elongated with ends protruding beyond the edges of the holder or thickened to provide the beam with the required stop area. In this case, the transverse planks of the metal cage 4 and 11 in contact with the assembly traverse are fixed to the cage by welding without lower welds to ensure better contact with the traverse. In the case of reinforcing a column having cantilevers with inclined faces, the vertical elements of the corner profile 3 in the framing zone of the cantilever are performed with a bent part 12, as shown in Fig. 5.

After completing the installation of the device, the metal cage 2 is compressed by hydraulic jacks 5 connected to one pump station and providing the same force impact of the thrust transmitted through the yoke 6 to the metal cage. Upon reaching the calculated efforts, the metal cage 2 is rigidly connected by welding with the thrust elements 10, after which the spacer device is dismantled for reuse, and the metal cage is included in the work.

The advantage of the proposed device is to expand the scope of use of the device for strengthening various load-bearing structures, in particular columns that have inclined or horizontal supporting surfaces for the cage in the upper part, to reduce material consumption and labor intensity when used due to a more rational design of the spacer device, which is due to the use of hydraulic jacks, based on the lower support elements and transmitting the spacer force to the pre-assembled crosshead, is hung th to the metal clip.

Claims (3)

1. Device for reinforcing load-bearing structures, including a metal clip mounted on a load-bearing structure, compressed in the longitudinal direction by a spacer and rigidly connected to thrust elements, characterized in that the metal clip is compressed by at least two hydraulic jacks supported through switchgears on the lower stop elements installed on the mortar layer and the interacting upper part with a combined traverse mounted on a metal holder made of two sim etrichno supporting channel bars located interconnected by bolts to abut a transverse strap holder and bearing on said jacks mounted beneath beam channels traverse. 2. The device for reinforcing the supporting structures according to claim 1, characterized in that the transverse strips of the metal cage adjacent to the planks that are the focus for the channel beams, are made elongated with the ends protruding beyond the edges of the cage, which are additional stops for the mentioned channels. 3. The device for strengthening the supporting structures according to claim 1, characterized in that the upper part of the metal casing is branched.

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