RU2570695C1 - Method of bored pile production and device for its realisation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method of bored pile production includes drilling of a well, rolling of helical grooves on well walls, explosive and hardening compound supply into a well and strengthening of well walls by pressing of the hardening composition into soil by explosion. Helical grooves are rolled into well walls by reciprocal movement of a toroid and a stem installed in the toroid inside the well. Well filling with hardening compound and formation of helical grooves is carried out simultaneously. Supply of the explosive and supply of the hardening compound is carried out during lifting of the stem and the toroid from the well. Hardening compound is pressed into soil by the stem and the toroid.

EFFECT: increased bearing capacity of a pile against action of vertical and horizontal loads, reduced prime cost of pile manufacturing.

2 cl, 1 dwg

Description

The invention relates to the field of construction and can be used for the manufacture of bored piles.

A known method of compaction of the soil, including drilling a well, laying in the well of explosives and compaction of the well with an explosion. Patent 2346111 C2, E02D 3/10, 2006.01.

The disadvantage of this method is that it is not suitable for the manufacture of bored piles.

A known method of manufacturing a bored pile, which provides for the formation of a well using a casing, installation of a reinforcing cage in the well, a working arrester, filling the well with hardening material and forming a well with broadening by producing high-voltage electric discharges at different levels, Patent 2117726 Е02D 5/34, 20.08. 1998.

The disadvantage of this method is the insufficient bearing capacity of the bored pile.

A known method of manufacturing a bored pile with a widened heel. Patent 2322550 C1, E02D 5/44, 2006.01.

This method of manufacturing a bored pile with a broadened heel is as follows.

Initially form a well for piles of the appropriate diameter.

Depending on the soil in which the well is formed, the well may be formed by drilling or puncture. Then, one or several charges in the form of cartridges with a non-detonating mixture containing fuel and oxidizer are lowered into the well at the electrodes. Solid fuel from the group polyethylene, polypropylene, polystyrene is used as fuel, and sodium or potassium chlorate is used as an oxidizing agent. The composition of the mixture and the design of the charge in the form of a cartridge filled with an oxidizing agent surrounding the hydrocarbon-containing elements in the form of films or tubes provide the course of the combustion reaction of the composition in the deflagration mode and the release of a significant amount of energy and gases. The triggering of cartridges in a closed volume occurs in the complete absence of smoke, odor, as well as powerful shock, seismic and sound waves.

After descent into the well of equipped cartridges with non-detonating mixture, the well is filled with concrete mixture and electrical initiation of ignition of the non-detonating mixture is performed.

A device for implementing this method includes a system for supplying concrete mixture to a well, a mechanism for feeding cartridges into a well that are connected by electrodes to an electric current source.

The disadvantage of this method and device is the insufficient bearing capacity of the bored pile and uneven compaction of the soil in the well.

The known method according to patent 2256029 C1, E02D 5/42.

The method includes drilling a well, filling the well with hardening material.

The known method according to patent 2181410, E02D 5/34.

The method includes drilling a well, introducing reinforcement, filling the well with hardening material, compacting the hardening material and ramming it into the ground, while ramming the hardening material into the soil and compacting it by applying successive strokes to the hardening material, while simultaneously forming a pile by applying successive strikes with a striker . After each impact, the well broadens due to compaction of the surrounding soil.

The disadvantage of this method is the insufficient bearing capacity of the piles, which entails the manufacture of additional piles.

For the manufacture of bored piles, a method of compacting the soil is known, including drilling a well, rolling threads on the wall of the well, and filling the well with concrete. Patent 2254410 C1, ЕСС 19/28, 06.24.2006.

To implement this method, a device is used that includes a screw and a device for rolling threads on the wall of the well and a system for supplying concrete to the well.

The disadvantage of this method and device is the insufficient bearing capacity of the piles.

The objective of the invention is to increase the bearing capacity of piles on the action of vertical and horizontal loads, as well as reducing the cost of manufacturing piles.

The problem is solved by the combined use of a group of inventions.

The expected technical result from the use of the invention is the application of the method, including drilling a well, rolling helical grooves on the well wall, supplying explosive and hardening composition to the well, initiating the explosive and compacting the hardening composition into the ground with an explosion, while rolling grooves on the well walls by reciprocating the torus and the rod installed in the torus in the well, while filling the well with a hardening composition and forming int grooves are produced at the same time, and the supply of explosive and the supply of hardening substance are produced during the lifting of the rod and torus from the well, and the hardening composition is pressed into the ground with a rod and a torus.

The method is carried out by a device for the formation of bored wells, including a traction unit, a fluid agent supply system, an explosive supply system, a rod with a working element for forming helical grooves, a torus mounted on the rod, while the torus shell is twisted and its ends are interconnected.

The presented drawing schematically shows a device for implementing the method.

The device shown in the drawing is made of a torus shell 1, which is filled with a fluid agent, for example a liquid, or gas, or powder.

The torus shell 1 is made of a cylindrical sleeve, the ends of which are rotated relative to each other by several turns and are tightly connected to each other.

The working body 2, for example a screw column, has a heel 3.

The working body 2 is connected to the rod 4.

At the wellhead 5, in any known manner, a mechanism is installed having the possibility of reciprocating movement of the rod 4.

The mechanism for reciprocating movement of the rod 4 is made of a truss 6, a pulley 7 mounted on the end of the rod 4. The pulley 7 is covered by a cable 8, the end 9 of which is fixed to the anchor 2, and the end 10 is fixed to the drive reversing drum 11.

The end of the cable 12 is connected to the rod 4 and the drive drum 13.

On farm 6, a hardening composition feed system 14 is installed, which is rammed into the soil 16.

Explosive is fed into the well 5 by system 17.

The torus shell 1 has a valve 18 for supplying a fluid agent.

The cable 12 is connected to the rod 4 through the swivel 19, which protects the cable 12 from twisting.

The device shown in the drawing, operates as follows.

In the well 5 serves a portion of the hardening composition 15.

Then the drum 13 lower the rod 4 with the screw column 2 into the well 5.

By rotating the drum 11, we wind the cable 8, which presses on the pulley 7, the pulley 7 presses on the rod 4, moving it down.

The torus shell 1 rolls along the wall of the well 5 and along the rod 4.

Due to the fact that the ends of the torus shell 1 are rotated relative to each other, the rod 4 begins to rotate and rotates the working body (drives the screw column), which begins to push the hardening composition into the soil.

After the rod 4 has dropped to its full length, the drums 13, 11 are rotated in the opposite direction.

The rod 4 with the working body 2 (screw column) is raised. After the torus shell 1 leaves the well 5, the rotation of the drums 13, 11 is stopped.

System 14 into the well serves a new portion of the hardening composition 15. After that, the rod 4 and the screw column are again lowered down.

After the stem 4 has dropped to its full length, it is raised. The cycles are repeated until the entire calculated volume of the hardening composition 15 is pressed into the soil 16 of the well 5.

After that, the rod 4 is raised and the explosive is lowered into the well 5 by the system 17. Then the well 5 is filled with a hardening composition 15.

The explosive is blown up.

The well is again filled with a hardening composition 15 and left in this state until the hardening composition 15 hardens.

The pressure of the current agent in the torus shell 1 and its length and diameter can achieve tremendous torque forces developed by the working body 2 (screw column).

Such a torque torque cannot be obtained by known methods and devices.

Example.

The method is implemented as follows.

Drill or pierce a well of appropriate diameter. Then, a reinforcing cage is installed in the well, and then the well is filled with hardening material 6, for example concrete.

As the hardening material 6 use a cement-sand mixture of composition, kg / cu. m compacted concrete:

Cement 400 Sand 870 Gravel with fractions of 5-10 mm 392 Gravel with fractions of 10-20 mm 478 Water 200

After this, the hardening material is compacted. The seal is produced by the device depicted in the drawing.

To do this, install the device in the well 5.

The hardening material is sealed by reciprocating rolling of the torus shell 1 with simultaneous reciprocating movement of the rod with the working body 2 (screw column).

As the hardening material is densified, it is added to the well if necessary.

Preliminarily calculate the amount of hardening material and the flow rate of the current agent, such as compressed air. After compaction of the hardening material, explosive is supplied to the well and hardening material is added to the well until the well is completely filled, after which the explosive is blown up.

Instead of this hardening material 6, it is allowed to use dry soil, such as loam.

Wells (bored) are located at certain distances in such a way as to ensure the required physical and mechanical characteristics of the soil in a sealed array.

According to the designer’s handbook (21.4 13.1.1, p. 299), “soil compaction is carried out to a certain degree of density, expressed in terms of compaction coefficient K _som , which is the ratio of a given or actually obtained value of the density of dry soil P _d to its maximum value according to standard compaction P _{d max} , that is, K _som = P _d / P _{d max} "

The recommended technology allows to obtain an average soil density up to P _d ≥ 2.1 t / m ³ and compaction degree K _som = 1.1.

The specified design density in the compacted mass is ensured by the corresponding calculation of soil piles with a known amount of soil that is packed into the wells.

Claims (2)

1. A method of manufacturing a bored pile, including drilling a well, rolling helical grooves on the wall of the well, supplying explosive and hardening composition to the well, and sealing the well walls by blasting the hardening composition into the soil, characterized in that the helical grooves are rolled on the walls of the well by reciprocating movement in the well of the torus and the rod installed in the torus, while filling the well with a hardening composition and the formation of helical grooves at the same time but, the feed supply and explosive hardening composition produced during lifting rod and the torus of the well, wherein the hardenable composition are pressed into the ground rod and the torus. 2. The device of a bored hole, including a working body, a fluid agent supply system, an explosive supply system, a rod with a working body for forming helical grooves, a torus mounted on the rod, while the ends of the torus shell are rotated several turns relative to each other and are hermetically connected between each other, while the cavity formed by the bent portions of the torus shell is filled with a fluid agent, the rod being connected to a mechanism having the possibility of reciprocating movement of the rod.

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