SU431280A1 - DEVICE FOR FREEZING GROUPS ^ A- WHEN ESTABLISHING UNDERGROUNDAL STRUCTURE - Google Patents

Description

The invention relates to the field of construction of tunnels, subways and other underground structures by special methods, in particular, to devices for artificially freezing soils.

In case of artificial freezing of soils, artificial durable fencing (round, rectangular or other outline) from frozen soil is impeded, preventing the penetration of ground water or water-saturated unstable soils into production during the production of mining or construction and assembly works. This artificial enclosure senses the pressure of the surrounding soil, as well as the hydrostatic pressure of the groundwater.

There are known devices for freezing soil during the erection of an underground structure, including a pipe and a supply pipe located in its cavity, through which coolant is supplied, which, by circulating through the pipe, cools its walls and adjacent soil.

The disadvantages of the known devices for freezing the ground is the need to pre-drill a well, associated with raising and lowering the drill string.

The aim of the invention is to provide

immersing the device in the ground without preliminary drilling.

This is achieved by the fact that at the bottom of the pipe is fixed by means of a transition

coupling bits with an open upper end entering the cavity of the pipe, with the upper end of the bit connected to a stopper mounted on the lower, perforated end of the inlet pipe having water supply tubes in its lower part.

The drawing shows the proposed device in section. Freezing Device

includes the pipe 1 and the inlet pipe 2 located in its cavity. At the lower part of the pipe 1, a bit 4 is installed by means of a transition sleeve 3, having an open upper end 5 which enters the pipe cavity

1 and has a thread 6 for connection with a stopper 7 mounted on the lower end 8 of the inlet nozzle 2. The lower end 8 of the inlet nozzle 2 is perforated.

The installation of the device is carried out as follows.

Pipe 1 is drilled into the ground, while the inlet pipe 2 is not inserted into the cavity of pipe 1. After pipe 1 is drilled to the required depth to seal the hole in

Bit 4, extending into the cavity of the pipe 1, is inserted into its cavity inlet pipe 2, on the lower end of which a plug 7 is mounted.

The plug 7 is screwed through the pipe 2 onto the upper end 5 of the bit 4, thus achieving sealing of the lower part of the pipe 1, but bringing coolant through the inlet pipe 2, which cools the walls through the non-perforated bottom pipe 2. pipe freezing surrounding soil.

Drilling is carried out with flushing the well with a clay mortar, while in order to eliminate the settled sludge and water supply pipe 2, water supply pipes 9 are mounted, along

during the screwing in of the plug 7, water is supplied to the upper end 5 of the bit 4.

Subject invention

A device for freezing soil during the erection of an underground structure, including a pipe and a supply pipe located in its cavity, is characterized in that, in order to ensure the device is immersed in soil without a preliminary borehole, on the lower part of the pipe is fixed by means of a transition bit of an open upper end entering the cavity of the pipe, with the upper end of the bit connected to the stopper mounted on the lower end of the inlet perforated end, which has in its lower part in dopodvod conductive tube.