SU1749406A1 - Multilayer wall - Google Patents

Abstract

Usage: in the construction of monolithic walls of buildings and structures for residential, social and industrial and industrial purposes. Technical essence: a multi-layer monolithic reinforced concrete wall contains an inner layer of insulation and outer concrete layers, connected to each other by ties. One of the concrete layers is carrier. The insulator is made with through holes that are evenly spaced across the entire field and filled with discrete concrete ties with splines rigidly connected to the outer concrete layers. In some of the keys, steel straps between the outer layers are embedded. Grooves filled with concrete of the outer layer are formed on the surface of the insulation, 1 hp f-ly, 3 ill.

Description

The invention relates to the construction and can be used in the construction of the outer monolithic walls of residential, social and industrial buildings and structures.

The known multi-layer monolithic wall containing outer concrete layers, one of which, facing the inside of the building, is made bearing, and the other, outside the building, plays a protective role for insulation between the layers of concrete. The outer concrete layers are connected to each other by means of ties, the ends of which are embedded in these layers, and the link itself is passed through a layer of insulation. In this construction of a wall, a condensate forms at the interface between the layers of concrete and insulation, which leads to corrosion of the bonds. To prevent this, the bond is made of stainless steel or protected with an anti-corrosion coating: the rod is protected before installing it into the wall along its entire length with foam material that prevents corrosion of the rod at the interface between the concrete and the heat-insulating layers.

The disadvantage of this solution is the need for an additional operation to apply the foam material to the rod. In addition, with mutual displacement of the wall layers relative to each other as a result of temperature effects, the integrity of the foam material may be compromised.

Known multi-layered wall with an inner layer of insulation and outer XI J

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ABOUT

monolithic concrete mi connected by core bonds,

However, when concreting the outer layers of the wall, evenly filling the interdeck space on both sides of the heat insulating layer is almost impossible to achieve, and the hydrostatic pressure of a higher level of the concrete mix will cause either a displacement of the heat insulating layer or its destruction.

The purpose of the invention is to improve the performance of the wall and ensure the design position of the insulation during concreting.

This goal is achieved by the fact that in a multi-layer wall containing the inner layer of insulation and the outer layers of monolithic concrete, connected by core bonds, the insulation is made with evenly spaced through holes to form in the latter concrete keys, while the rod & The links are located along the axis of the individual keys.

In addition, grooves are made on the surface of the insulation facing the outer layer, forming concrete reinforcement ribs in the latter.

Figure 1 shows a fragment of a monolithic multilayer wall; figure 2 - the outer side of the wall; FIG. 3 shows a reinforcement tie rod.

In the intervals between formwork 1 and 2, a layer of insulant 3 is placed, made in the form of a slab with through holes 4 placed evenly over the entire field of the slab perpendicular to its surface. Reinforcement rods 5, which play the role of connections between concrete layers 6 and 7, are inserted into a part of the holes. Through the other holes in the heat insulating layer, clamping bolts 8 of the formwork are passed. Insulation surface can have horizontal 9 and 10 vertical grooves, which, after filling them with concrete during the formation of the outer layers of the wall, play the role of edges, thereby increasing the bearing capacity of the concrete layer. The grooves may cross the holes or be between the holes.

Concrete layers are, as a rule, of varying thickness: layer 6, located inside the room, is thick and thicker, it is formed without breaks along the entire height of the building; the layer 7, located outside the room, performs a protective function in relation to the insulation, is molded self-supporting within the floor, for which when forming this layer between the floors, gaps are arranged, filled with gaskets 11 — this solution reduces the load on this layer arising from verticals of the wall from temperature differences inside the outside of the room. Horizontally, vertical rusts 12 are made on the surface of the wall that forms the facade of the building, which relieves stress from horizontal loads of the same origin.

The wall is made as follows.

Formwork 2 is placed in the design position, then plate insulation 3 is installed, reinforcing rods 5 are inserted in part of the openings 4 of which, then formwork 1 is placed. Between formwork 1 and 2, they are fastened with fixing bolts 8. playing the role of connections between concrete layers 6 and 7, can be any known, applicable for this case, for example, in the form of a rod with bent ends 13, on which a plastic ring 14 is put, installed in the hole 4 of insulation. After completion of the installation of the formwork and insulation, concrete is fed into the decking space 15, filling both spaces of the decking space 15 at the same time, located on both sides of the heat insulating layer 3, Some unevenness in filling the concrete with cavities is compensated by the fact that the concrete has the ability to flow from the cavity to the cavity holes 4, because the diameter of these holes at least twice the maximum particle size of the aggregate concrete mixture. The fixing bolts 8 and reinforcement bars 5 are installed only in the part of the holes 4 spaced 400-600 mm from each other. The insulation of the insulation 3 relative to the formwork 1 and 2 is carried out by known methods.

The keys 16 formed during the concreting process perform the following functions:

transferring the load from the outer concrete layer 7 to the inner concrete layer 6;

perceive the load on the concrete layers from temperature differences outside and inside the building;

serve as a corrosion-resistant coating for reinforcing bars - bonds 5;

keep from losing stability due to wind exposure to the outer concrete layer 7;

improves the breathing of the wall, since concrete is more breathable than polystyrene foam used as a heat insulating layer 3,

As the temperature regimes change, the thickness of the insulation varies, but in any case, the cross-sectional size of the discrete communication –pins should not exceed the value corresponding to the temperature of condensation on the wall surface inside the room opposite the location of the discrete communication, i.e. dew point.

Claims (2)

Claim 1. Multi-layer wall containing the inner layer of insulation and the outer layers of monolithic concrete, connected by core bonds, characterized in that, in order to increase the operation the quality of the wall and the provision of the design position of the insulation during concreting, the insulation is made with evenly spaced through holes with the formation of concrete dowels in the latter, while the core connections are located along the axis of the individual dowels. 2. Wall according to claim 1, characterized in that grooves are made on the surface of the insulation facing the outer layer with the formation of concrete stiffeners in the latter. ten four 15 P FIG. 2 Fig.Z