SU817141A1 - Ferroconcrete foundation block - Google Patents

Description

(54) FOUNDATION CONCRETE UNIT

one

The invention relates to the construction, in particular to the construction of the foundations of buildings and structures.

A base reinforced concrete element is known, which is hollow with its hinged tip 11 pivotally attached to its lower end.

Its disadvantage is the presence of moving parts, which complicates the fabrication of the base element and reduces the reliability of its operation.

Closest to the present invention is a foundation reinforced concrete block, made in the shape of a polyhedron with a through longitudinal hole, provided with a vertical and horizontally arranged in height with a closed transverse reinforcement 12.

The disadvantage of this block is the limited scope due to the insufficiently high bearing capacity due to the insignificant volume of compacted soil around the block and the impossibility of increasing its bearing area.

The purpose of the invention is to increase the bearing capacity of the base of the foundation block by increasing the area of the block bearing on the ground and the volume of compacted soil around it.

This goal is achieved by the fact that in a reinforced concrete block, made in the form of a polyhedron with a through longitudinal hole, provided with a longitudinal vertical and horizontally arranged in height, closed transverse reinforcement in its lower part (in the corners of conjugation of faces) in a row of transverse reinforcement W are made with compensatory loops, between the branches of which there are vertical

There are 5 separating plates, and in the block test (at the level of the upper row of transverse reinforcement with compensating loops) horizontal separator plates are placed.

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FIG. 1 shows the proposed foundation block, immersed to the design dimension, longitudinal section; in fig. 2 shows a section A-A in FIG. 1, FIG. 3 - base unit in the working position, longitudinal section r in FIG. 4 - section bb and fng. H; in fig. 5 — node I ng1 of FIG. 2

The proposed foundation block is a reinforced concrete

0 multifaceted truncated pirgshndu with

a through longitudinal screwdriver, reinforced by a vertical 1 and horizontally arranged in rows in a height of closed transverse 2 reinforcement. In the lower part of the foundation block (in the corners of interface of the faces) the transverse reinforcement 2 is made with compensating loops 3, between the branches of which vertical separation plates 4 are installed. In the body of the block (at the level of the upper row of transverse reinforcement with compensatory loops) horizontal separation plates 5 are placed. Plates 4 and 5 can be made of metal, plastic, mass, or other materials.

For the foundation device, the unit is immersed in the ground, for example, by means of vibrators, driving, etc. In this case, the bottom is locked with any known device (not shown) in order to avoid getting the soil inside the element. After the block is submerged to the design mark, aggregate b, for example, crushed stone or concrete, is loaded into the internal cavity of the lower part up to the level of horizontal separation plates 5. When the aggregate is tamped into the base, the spacer horizontal forces will be transmitted to the inner stems of the element. At the same time, the faces of the block will spread in the places of their conjugation; along the separator vertical plates 4, compensating loops 3 straightening and transverse reinforcement 2 will occupy the design position, and at the level of the horizontal separation plates 5 the lower part of the block faces will turn on the vertical reinforcement 1. The foundation block will open. As a result, the area of the lower part of the block will increase and the base under. it is compacted by the filler embedded in it. Further, the internal cavity of the block is filled with concrete, which monoliths transverse reinforcement bared in the corners 2.

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The proposed precast concrete block structure with a bottom opening, unlike the known ones, is simple to manufacture, as it only requires special reinforcement. It allows you to increase the bearing capacity of the foundation due to the compacted base under it and an increase in its footing. Therefore, the precast reinforced concrete foundation element can be shorter than similar structures, and with sufficient dimensions of the internal opening, columns can be installed directly into it after cementing.

Claims (2)

1.Gmoshinsky V.G., Goldin Y.S. Basics of engineering forecasting on the example of pile foundations. M., stroiizdat, 1972, p. 95, fig. 15. 2. Ganichev I.A. Arrangement of artificial foundations and foundations. M., stroiizdat, 1973, p. 22, fig. 1-9. Aa  . Cho. . .З. 7i / (. "