RU1786225C - Method of erecting pile - Google Patents

Abstract

The invention relates to the field of construction, and in particular to methods for erecting bored piles. The purpose of the invention is to increase the bearing capacity of piles while reducing the complexity of the construction. The method of pile construction includes immersing a tubular guide in the ground, along which an annular stamp is introduced into the ground using a power pipe. After removing the power pipe and the stamp from the soil, a concrete mixture is fed into the formed annular cavity, which is pressed into the outer walls of the cavity with a stamp dipped with the help of the power pipe, then the power pipe, stamp and the tubular guide are removed, and the annular cavity formed entirely of soil and the surface the shells of the concrete mixture pressed into the ground are filled with concrete mixture, after hardening of which the whole can be developed and the bottom concreted. 2 s.p. f-ly, 3 ill.

Description

(/)

WITH

The invention relates to the field of construction, in particular to methods for erecting bored piles.

There is a known method of pile construction, including the formation of a cavity in the soil by immersion in it of a steel pipe with a closed end, supplying concrete mixture into the cavity, pressing the base into the soil and removing the pipe from the soil.

The disadvantage of this method is the high complexity of the construction and underutilization of soil resistance along the side surface of the pile.

Closest to the invention is a method of construction of piles, including the formation of an annular cavity entirely inside by immersion in the soil of the annular stamp using a power pipe mounted thereon having an outer diameter smaller than the outer diameter of the annular stamp, feeding into the annular cavity

concrete mix and power pipe extraction.

The disadvantages of this method are excessive labor costs for compaction of the core, which is practically not involved in the operation of the pile, and under-compaction of the walls of the cavity, which leads to a decrease in the bearing capacity of the pile along its lateral surface.

The aim of the invention is to increase the bearing capacity of piles while reducing the complexity of the construction.

This goal is achieved in that, according to the method of construction of piles, including the formation of an annular cavity with the entire inside, immersion in the soil of the annular stamp using a power pipe mounted on it having an outer diameter smaller than the outer diameter of the annular stamp, feeding concrete into the annular cavity and extraction of the power pipe, in the process of forming an annular

Jvj oo

Pts N)

Yu

SL

cavities in the ground are additionally immersed in the tubular guide for the stamp with an external diameter not exceeding the inner diameter of the latter, after the formation of an annular cavity in the ground, the force pipe is removed from it together with the stamp, and the concrete mixture is pressed into the outer walls after it is fed into the annular cavity of this cavity with a stamp, acting on it with a power pipe, after which the power pipe, stamp and tubular guide are removed, while the annular cavity formed between the entire surface of the shell from the depression the soil of the concrete mixture, filled with concrete, the pillar is developed and the bottom is concreted.

The invention is illustrated by drawings, in which Fig. 1 shows the step of completing the formation of an annular cavity in the soil; Fig. 2 shows the step of completing the pressing of the concrete mixture into the walls of the annular cavity with the punch and power pipe removed; in FIG. 3 is the step of concreting the cavity between the whole and the concrete mixture pressed into the ground.

The pile construction method is carried out as follows.

In a known manner (pressing, driving, vibration dipping), a tubular guide 1 is inserted into the base soil, along which an annular die 3 is immersed into the ground using a power pipe 2, the inner diameter of which is not less than the outer diameter of the tubular guide. By displacing the soil with a stamp around the formed annular cavity 4, a compacted soil zone 5 is formed. After removing the power pipe and the stamp, a concrete mixture is fed into the annular cavity, which is pressed into the cavity walls with a stamp dipped with the help of the power pipe, forming a concrete shell 6 and increasing the area of compacted soil, which increases the resistance of the pile along its lateral surface. Then, a power pipe with a stamp and a tubular guide are removed from the base, and a concrete mixture is fed into the cavity 8 formed between the whole 7 and the shell 6. If necessary, a reinforcing cage can be installed in cavity 8 before concreting it.

In order to increase the load-bearing capacity of the pile by increasing its drag, and with large diameters (meters) and to accommodate equipment in the pile body, the whole bottom 7 of the soil is developed and concreted.

The construction of the pile by the proposed method allows to increase the load-bearing capacity of the pile due to the fact that the use of the tubular core leads to compaction of only the outer walls of the annular cavity 4 in the absence of compaction of the core of the core, which does not actually participate in the operation of the pile, and non-compaction of the core of the core reduces labor costs. Pressing the concrete mixture into the soil with the formation of a shell 6 leads to an additional compaction of the near-pile soil and an increase in the side surface of the pile, which increases the bearing capacity of the pile along its side surface.

Claims (3)

1. A method of constructing a pile, including the formation of an annular cavity with the entire inside by immersion in the soil of the annular stamp using an installed power pipe having an outer diameter smaller than the outer diameter of the annular stamp, feeding concrete into the annular cavity and extracting the power pipe, characterized in that, in order to increase the bearing capacity of the piles while reducing the complexity of the construction, in the process of formation of an annular cavity, a tubular guide for the punch is additionally immersed in the soil with an external diameter not exceeding the internal diameter of the latter, after the formation of an annular strip in the soil, the power pipe is removed from it together with the stamp, and the concrete mixture, after it is fed into the annular cavity, is pressed into the outer walls of this cavity with a stamp, acting on it with a force pipe, after which removing the power tube, stamp and tubular guide, 2. A method according to claim 1, characterized in that the annular cavity formed between the whole and the surface of the shell from the concrete mixture pressed into the ground is filled with concrete. 3 .. The method according to paragraphs. 1 and 2, characterized in that the whole development is carried out and the bottom is concreted. FigT Figs Fig. E