SU1749387A1 - Method of pile installation - Google Patents

Abstract

SUMMARY OF THE INVENTION: The pile is erected by driving into the loose ground of the trunk with widening, the trunk consisting of telescopic sections, the first section of the trunk is hammered all the way to its broadening into the bottom of the well, each succeeding hammering the previous section to the stops 6 Il.

Description

The invention relates to the field of construction of foundations for tower type supports, in particular for power transmission lines.

There is a known method of driving piles into weak bases, which consists in filling a previously drilled well into the grinding mixture and driving piles into it.

The disadvantages of this solution are

- insufficient bearing capacity due to the lack of compaction of the near-barrel soil:

- insufficient industrialization due to the need to perform a wet process

The aim of the invention is to increase the bearing capacity of the pile being raised due to the indentation of the bulk material into the surrounding soil.

Figure 1 shows the immersion of the 1st section of the pile (1st stage); figure 2 - immersion of the 1st section (final position); Fig. 3 shows the installation of a subsequent submersible section; figure 4 - immersion of the subsequent section (final position);

Fig 5 - node I in Fig.4; FIG. 6 is a section A-A in FIG. 5.

The method includes installation in the pre-drilled well 1 of the pile 2, consisting of the first section 3, provided in the upper end with anchor bolts 4 and an overlying tubular section 5 with holes b for the anchor bolts. The sections are provided with annular widening 7, there is a sprinkling of bulk material 8 and a soil backfill 9

The construction of the foundation is carried out as follows.

The pre-drilled well 1 is installed with the initial driving into the bottom of the first section 3 in such a way that the ring broadening 7 belonging to it rises above the wellhead 1 not less than 0.5-0.6 m. Then it is filled into the well 1 friable of the material 8. With the help of the pile-driving unit, the section 3 is further immersed, during which the granular material 8 is pressed into the bottom by means of the ring broadening 7 and partially into the walls of the borehole (L

WITH

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1. The immersion is carried out up to the stop of the ring broadening 7 in the bottom of the well 1.

Overburdening overlying section b is suspended on the trunk of the first section 2 so that the ring broadening 7 belonging to it is located at a height of 0.5-0.6 m above the wellhead 1. Then the bulk material 8 is poured into the well cavity - gins 1. Thereafter, the subsequent section 5 is immersed, which slides along the surface of the first section 3 up to the stop with its lower end into the annular broadening 7 belonging to the first section 3. In the process of this immersion, a friable 8. In the process of achieving the design position by section 5, anchor bolts A belonging to section 3 pass into holes 6 located at the end of section 5, where they are fixed by electric welding.

As a result of the implementation of the described method, an array of compacted soil is formed in the near-wellbore space, which ensures the joint operation of pile 2 with the surrounding soil. Well space 1 is between

its mouth is up to annular broadening 7; it is filled with earth filling 9 with compaction. The described technical solution creates the following technical and economic effect:

- increased bearing capacity due to the joint work of the pile with the surrounding soil;

-reduction of deformability due to pre-compression of the walls of the well;

- increased reliability by ensuring the filling of the gap between the pile and the walls of the well with a high degree of compaction.

Claims (1)

Claims The method of raising a pile, including the formation of a well, filling it with loose material and driving through it into the ground with a broadening height, characterized in that, in order to increase the bearing capacity of the pile being erected due to the indentation of the bulk material into the surrounding soil, the composite is used from the telescopic sections, the trunk, the first section of which is hammered all the way to its widening in the bottom of the well, and each subsequent section is hammered all the way to its lower end in the broadening of the previous section V ./ from  WM &and 2