SU685762A1 - Method of thermal consolidation of soil - Google Patents

Description

This invention relates to the field of construction. The method can be used to strengthen the foundations of buildings and structures in subsiding and wet grounds. There is a method of thermal strengthening of soils, including the formation of a well, sealing its mouth, burning combustible mixtures in it in the field of ultrasonic vibrations and firing the array of soil 1. This method can be effectively used in subsidence soils with low humidity. in the calcined massif on certain radii (40-60 cm), steam accumulates and so-called jackets form from condensed water, which impede the movement of hot gases, and the calcination of the ground mass is reduced. This increases fuel, air and soil firing. The closest in technical essence and the achieved result of the invention is a method of thermally reinforcing soil, including the formation in the reinforced mass of soil of the main and auxiliary wells, their sealing, increasing the gas permeability of the fixed soil mass, supplying the main well under pressure of combustible mixtures and burning them 2. The gas permeability of the fixed soil mass is increased before burning of combustible mixtures by blowing compressed air into auxiliary wells. The disadvantage of this method is the inefficiency of blowing the fixed soil mass, especially with a moisture content of more than 10%, since squeezing free and connected water from them occurs slowly and with a large expenditure of energy. The aim of the invention is to provide the possibility of burning wet soil and reducing energy intensity. into the main well under the pressure of combustible

mixtures and burning them, increasing the gas permeability of the fixed soil mass is carried out by creating a vacuum in the main and auxiliary wells with simultaneous removal of water from the strengthened, soil mass to reach the residual moisture content of it less than 10%, and in the process of burning combustible mixtures the main well vacuum in the auxiliary wells is maintained until steam appears in them. In this case, the burning of combustible mixtures can be carried out in the field of ultrasonic vibrations.

Fig. 1 shows schematically the process of creating a vacuum in the main and auxiliary wells; in fig. 2 shows the process of creating a vacuum in auxiliary wells and oxidizing combustible mixtures in the main well; Fig. 3 shows the process of burning combustible mixtures in the main well.

In the strengthened soil mass 1, the main well 2 and auxiliary wells 3 are formed, the mouth of which is sealed with weights 4. Through the holes 5 and 6 in the weights, a vacuum unit (not shown in the figures) is connected to wells 2 and 3.

The reinforcement of the soil is carried out as follows.

In the main wells 2 and 2 auxiliary wells 3, a vacuum of vapichina is created up to 100 kN / m and air and an ox are sucked out of the reinforced soil mass 1 to a residual moisture content of less than 10%. mixtures under pressure up to 6 MPa depending on the quality of sealing her mouth / m: and more and with the oscillation frequency of 80-1000 kHz. Under the influence of overpressure and ultrasonic vibrations, hot gases — the coolant with a temperature of 200–900 ° C is filtered into the soil mass; the less moisture in the soil mass and the greater its gas permeability, the faster the strengthening occurs. The vacuum in the auxiliary wells 3 support up to those.

Gtor, until in them there is no steam from the array of soil, then remove the vacuum. The firing of the reinforced soil mass is considered complete if, at its boundary, the soil temperature has reached or is more than, and the shutter speed is at least 40 minutes.

The described technology of thermal strengthening of the soil makes it possible to obtain keraghic piles (burned

Q soil pillars) with a diameter of 40-400 cm and a depth of 2-20 m, with this, the quality of the fortified is always guaranteed

array of soil. This method makes it possible to reduce fuel and oxide costs and to reduce the duration of the strengthening of the soil mass, and, consequently, the time needed for the erection of buildings and structures.

The method is recommended to use

, v dp strengthening the foundations of the foundations of buildings and structures in subsiding soils of types I and II.

Claims (2)

Invention Formula 1, Method of thermally strengthening the soil, including the formation of the main and auxiliary wells in the reinforced soil massif, the core of each well, increasing the gas permeability of the soil mass to be fixed, supplying combustible mixtures to the main well under pressure, and m l h In order to enable the rovHTOB wetlands to be burned and to reduce energy intensity, the gas permeability of the fixed soil mass is increased by creating  auxiliary wells of vacuum with simultaneous removal of water from the reinforced soil mass until the residual moisture content in it is less than 10%, and during the combustion process5 or combustible mixtures in the main well, a vacuum is maintained in the auxiliary wells until steam appears in them, 2. A method of thermally strengthening soil 0 according to claim 1, characterized in that the combustion of combustible mixtures is carried out in the field of ultrasonic vibrations. Sources of information taken into consideration during the examination 1, USSR Author's Certificate No. 390229, cl. E 02 D 3/10, 1973. 2, USSR Author's Certificate No. 538094, E 02 D 3/14, 1976. "S Tt tf "/ I , five 1 - (put3