RS49634B - PROCEDURE TO INCREASE SOIL BEARING - Google Patents

Abstract

A method of increasing the load-bearing capacity of a soil, characterized in that an adequate number of aluminum anodes (5) are inserted in the compromised soil (2) from the inside of the wall adjacent to the foundation (1) and copper cathodes (6) are inserted from the outside of the wall, electrodes (5, 6) with cables (8) connected to the generator (7) of direct current. The application contains 2 more dependent claims.

Description

a) The technical field to which the invention relates

The invention belongs to the field of construction, mining and military operations and

refers to the apparatus with which the procedure of increasing the bearing capacity of the soil is realized.

b) Technical problem

The invention solves the problem of reduced bearing capacity of the soil, i.e. the soil below

foundations of buildings, which rise due to wetting of the soil or the subsequent raising of floors on buildings, which causes subsidence or even uneven subsidence of the building. The proposed procedure of electrosomotic injection eliminates the mentioned disadvantages by increasing the strength and load capacity of the soil treated in this way.

c) State of the art

The previous solution to the problem of reduced bearing capacity of the soil due to increased humidity or increased weight of buildings by building additional floors, which resulted in uneven settlement or a combination of settlement and sliding of such buildings.

g) Presentation of the essence of the invention

The invention is based on a procedure that uses certain apparatus

the effect of direct current electric current expressed as the effect of electroosmotic soil injection.

The apparatus consists of a source of direct current, which can produce a certain voltage, voltage gradient, that is, a certain current strength and density, which is imposed on the ground through cables and electrodes, which needs to increase its bearing capacity. In this way, by driving the electrodes into the ground and filling the perforated anode with electrolyte, an electric current is released, which transports the electrolyte from the anode to the cathode, and in this way the electroosmotic injection of the soil is carried out, i.e. increasing its strength and thus its load capacity.

d) Brief description of the drawing image

The invention is described in detail in the drawing that represents the foundation of the building

which occurred as a result of overhanging to an increased load, i.e. subsequent subsidence and sinking. On both sides of the foundation, a row of tubular anodes that are filled with electrolyte and a row of cathodes are driven at a depth greater than the depth of the foundation for its width. The electrodes are connected to each other by electrical cables with a built-in ammeter and voltmeter to a direct current source.

f) Detailed description of the invention

The picture shows the apparatus for the procedure of increasing the bearing capacity of the soil, which consists of a source of direct current electricity (7), a certain number of tubular perforated anodes (5) filled with electrolyte (11) driven into the ground, a certain number of cathodes (6) driven from the other side of the wall (3), that is, the foundation (4) into the ground (2). The electrodes (5,6) are interconnected by a cable (8) with a source of direct current (7).

The principle of action of pronalska is based on the occurrence of electroosmosis, that is, electrosomotic injection of the soil on which the foundation of the building is based. When the system is put into operation, a direct electric current of a certain strength and voltage flows through it, under the influence of which it is started from among the hollow and perforated anodes (5) filled with electrolyte (11). That electrolyte (11), which, depending on the type of mineral from which the soil is made, can be potassium chloride (CaCl2), blue... (CuS04), sodium silicate or as it is also called glass water (Na2Si03) and lime (Ca(OH)2) moves under the influence of the current from the anode (5) to the cathode (6) through the soil (2). During the passage of the electrolyte (11) through the soil (2), a cationic change occurs, which leads to an increase in the strength or load capacity of the thus changed soil (2). The arrangement of the electrodes depends on the depth and width of the foundation, the specific resistance of the soil, as well as the geomechanical characteristics of the soil (20. The control of the process is carried out by constant monitoring of the current through the built-in ammeter (9), that is, the voltage through the built-in voltmeter (10). The load capacity is increased after a certain time by taking samples from the soil (2) and laboratory testing. The length of the treatment is until the necessary increase in soil strength is achieved, which is proven by taking samples and laboratory tests. The process takes an average of 48 hours, or 20 days.

Claims (3)

1. The procedure for increasing the bearing capacity of the soil, indicated by the fact that in the threatened soil (2) the appropriate number of aluminum anodes (5) are driven from the inside of the wall next to the foundation (1), and copper cathodes (6) are driven from the outside of the wall, while the electrodes (5,6) are connected to the direct current aggregate (7) by cables (8). 2. The method according to claim 1, characterized in that the anode (5) is a hollow perforated tube. the length of the depth of the foundation into which the electrolyte (11) is poured, the cathode (6) is the same length as the anode. 3. The procedure according to claim 1, indicated by the fact that it lasts 700 hours without interruption, during which samples are taken and geomechanical parameters are controlled, such as strength, that is, cohesion and the angle of internal friction.