SU123884A1 - Method for compacting saturated soils and device for implementing the method - Google Patents

Description

When erecting land hydraulic structures using the method of hydro-mechanization, the requirements imposed by the technical conditions make it necessary in a number of cases to carry out special work on the artificial compaction of unlinked sandy soils, washed into the body of the structure.

The compaction of water-saturated soils is most effectively carried out by the method of deep compaction with the vibrator heads of various designs, the injection of compressed air under constant pressure, etc.

All of these methods have different efficiencies and are often inefficient, and the equipment used is cumbersome.

The proposed method improves the efficiency of soil compaction.

This is achieved by injecting compressed air into the body of an earth structure under variable (pulsating) pressure.

The pulsation of air produces a dynamic effect, disrupts the structure and causes the process of separation of water-soil mixture. Suspended particles of soil, under the action of its own weight, are deposited, forming a more dense embankment.

The drawing shows a device for carrying out the proposed cut-off and its end view.

The device is mounted on a tractor base / unit with a remote control cabin 2 and a counterweight 3, having a pulsator 4 driven by an internal combustion engine, boom 5, on which two pulsation tubes 6 connected by flexible hoses 7 to a compressed air supply source are suspended, and winch 5 dl

No. 123884

lowering and lifting pipes also driven by a tractor. For better immersion into the ground, the pipes are supplied with loads 9.

As a pulsator and a compressed air supply source, a converted two-cylinder compressor can be used, in which each cylinder that creates a pulsation of air is directly connected to its own pipe.

During operation of the device, pulsating air spheres are formed at the lower ends of the pipes, which are the source of dynamic effects in the form of elastic waves propagating in water-saturated ground.

Soil compaction machine is as follows.

The device is fed to the area to be compacted, after which the pipes are shipped to the ground under the action of pulsation and its own weight with preload. Then the pipes are lifted before they leave the ground. When the pipes are lowered, the soil completely dilutes, and when it is raised, it thickens. In this case, excess water is carried to the surface and partially filtered through the soil. These two operations, which last together for 3-4 minutes, end the process of soil compaction.

In one puncture, the soil compresses within a radius of up to 5 m from the pipe axis to the full depth of the needle drop (4-m.

Subject invention

Claims (2)

1. A method of compacting water-saturated soils with compressed air injected in them, characterized in that, in order to increase efficiency, compressed air is injected into the soil with a variable (pulsating) pressure. 2. A device for carrying out the method according to claim 1, consisting of a tractor, immersed in the ground and pipes extracted from it, known devices for immersion and extraction of pipes and a power source with compressed air, characterized in that in order to increase its productivity, equipped with a pulsator that creates alternating pressure of air injected into the ground.