RU1813845C - Process of construction of foundation - Google Patents

Description

1

(21) 4762618/33

(22) 11.22.89 (46) 07.05.93. Bull. No. 17 (75) V.I. Volosny

(56) Dalmatov B. I. Soil mechanics, foundations and foundations. Stroyizdat. L.O., 1988, p. 325. Fig. 12/13 c. (54) METHOD FOR ESTABLISHING A FOUNDATION

(57) SUMMARY OF THE INVENTION: in a method of building a foundation by the method of a lowering well, when the bottom is made between its ends and the ends of the walls of the shell, nests are formed around the perimeter, into which jacks are placed with an emphasis on the ends of the walls of the shell and the bottom is pressed with the calculated force into the ground to form the ends of the walls of the shell of the gap, which is filled with hardening material, and after a set of material of a given strength, the jacks are dismantled. 3 ill.

The invention relates to the construction, in particular, to the construction of foundations of structures for various purposes by the well method.

The purpose of the invention is to increase the bearing capacity of the foundation for vertical and horizontal loads.

In FIG. 1 shows a cross-section of a foundation under construction at the stage of execution of the bottom; Fig. 2 - the same, at the stage of crushing the bottom; in FIG. 3 - the same, at the stage of monomonitoring the gap.

The drawing shows: a vertical floor sheath 1 with a knife 2 at the lower end of its walls, a curved convex bottom 3, a soil base 4, sockets 5, jacks 6, a concrete monopolizing the gap 7.

The method is carried out as follows.

After lowering the hollow shell 1 to a predetermined depth by known methods, the soil surface of the base 4 is profiled using a template. Then, prefabricated elements of the curved convex bottom 3 are installed with a crane and the gaps between them are monochromatic (not shown). After

Once the concrete has been secured with sufficient strength along the contour of the bottom 3, jacks 6 are installed in advance in the lower part of the walls of the shell 1 and have jacks 6 abutted against the wall of the shell 1 and create design forces in them.

The total design effort of the jacks 6 is determined by the dead weight of the shell 1, taking into account the load (not shown in the drawing) and the soil resistance forces of the base 4 along the side surface of the shell 1. The forces from the jacks 6 are transmitted to the bottom 3 and through it to the ground of the base 4. B as a result of soil compression, the bottom 3 moves down, forming a gap with the knife 2 of the sheath 1. The specified gap is filled with monolithic concrete 7. After the concrete 7 has been set to the required strength, the jacks b are dismantled. After some time, the base 4 relaxes the stresses due to the calculated efforts of the jacks, both directly under the bottom 3, and in the soil layer adjacent to the side surface of the shell 1.

With the bed growth of the vertical load applied to the foundation to a level corresponding to the calculated

00

with

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N

ate

the forces created by the jacks will not practically show the foundation, since the base soil has already been compressed. The bearing capacity of the foundation for horizontal load also increases, since in the described method the resistance to horizontal movement of the base of the foundation is determined by the shear resistance of the compacted soil.

Claims (1)

SUMMARY OF THE INVENTION A method of erecting a foundation by the method of a lowering well, comprising erecting a hollow shell on the surface of the soil, extracting Q through the cavity of the soil shell while lowering 0 5 it to a predetermined depth and the subsequent execution of a curved bottom facing the soil with a convex surface, characterized in that, in order to increase the bearing capacity of the foundation for vertical and horizontal loads, when the bottom is made between its ends and the ends of the walls of the shell around the perimeter they form nests into which they are installed the jacks with an emphasis on the ends of the walls of the shell create calculated forces in the jacks and press the bottom into the ground to form a gap between it and the ends of the walls of the shell that is filled hardened material, and after a set of material of a given strength, the jacks are dismantled.