SU1567743A1 - Column foundation - Google Patents

Abstract

The invention relates to the field of construction and concerns the construction of foundations for columns. The purpose of the invention is to improve the static operation of a rectangular foundation in terms of the surface by making the surfaces of the lateral sides of adjacent peripheral blocks 3 oblique. The angle of inclination of the surface of the lateral sides of the peripheral blocks 3 is inversely proportional to their width. The angle of the lower surfaces of the consoles 2 is inversely proportional to their length. Internal links are located between the peripheral blocks 3 at the points of their inner sides, and external links are located at the points of the outer sides of the peripheral blocks 3. 4 Il.

Description

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(L

Thebes;

The invention relates to the construction and construction of foundations for columns.

The aim of the invention is to improve the static operation of the rectangular in terms of the foundation.

FIG. 1 shows the foundation, cross-section; in fig. 2 - the same plan view; in fig. 3 - interconnection of peripheral blocks by external connections, general view; in fig. 4 - interconnection of peripheral blocks by internal connections, general view.

The foundation consists of a central unit 1 with consoles 2 and peripheral units 3. The peripheral units 3 are made in pairs identical in two directions of the foundation. The bottom surface of the console 2 is inclined to the axis of the basement. Peripheral units

3 are trapezoidal in plan, and the sides of the adjacent peripheral blocks are inclined. In this case, the angle of inclination of the surface of the lateral sides of the peripheral blocks 3 is inversely proportional to

their width, and the angle of inclination of the lower surfaces of the consoles 2 is inversely proportional to their length.

In the places of joining the inner sides of the peripheral blocks 3 internal communications 4 are located, and in the places of joining the outer sides there are external connections 5.

The central unit 1 can be made either as a single element or consisting of two elements: the knee 6 and the plate 7 with the knee cup.

Plate 7 may have a different number of steps. Internal communications

4 made in the form of short reinforcing bars, and external connections 5 in the form of metal plates of angular section.

The foundation works as follows.

In the first stage, the load from the column is transmitted by the base of the central unit 1 to the base soil. As the load increases in external connections x 5, which fix the position of the peripheral blocks 3 relative to the center of the foundation, and internal links x 4, which keep the peripheral blocks 3 from turning, tensile forces arise, and in the latter they

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growth is more intense. Reactive pressure is distributed according to some non-linear law, and its value under the center of the central unit 1 is higher than under the most loaded edge. At the second stage, after the internal connections of the internal connections fail 4, the foundation changes its shape: the central unit 1 settles, the peripheral units 3, settling, turn, tilt toward the center. The sole t gets the shape of an inverted slab with a low slab plate. The ground under the foundation is compacted most intensively under the central unit 1. The load from the column is transmitted by the sole of the central unit 1 of the base soil and the inclined surfaces of the cantilevers 2 with an inclined peripheral block 3. The latter, pressing each other in inclined sections lateral surfaces, form a single closed peripheral part of the basement.

The reactive pressure is distributed non-linearly, with the pressure value under the center of the central unit 1 exceeding the pressure under the most loaded edge. At all stages of the foundation operation, the concrete in the central most loaded part of the central block remains compressed, which makes it impossible to reinforce it.

Claims (1)

Invention Formula The foundation for the column, comprising a central unit with consoles, the bottom surface of which is made inclined to the baseline axis, peripheral blocks and external and internal connections, characterized in that, in order to improve the static operation of a rectangular baseline, the sides of adjacent peripheral blocks are made inclined, and external connections are made in the form of metal plates of angular section, with the angle of inclination of the surface of the lateral sides of the peripheral blocks inversely proportional to their width, and the angle The bottom of the bottom surfaces of the consoles is inversely proportional to their length, while the internal connections are located between the peripheral blocks at the points of their inner sides, and the external links are located at the points of the points of the outer sides of the peripheral blocks. R Fig.Z one FIG. 2 FIG. four