SU1792532A3 - Device for determination of water tightness of frozen soils - Google Patents

Description

The invention relates to soil hydrophysics and can be used in agriculture and forestry for hydrological and land reclamation studies.

Known device for determining the permeability of soils, including an external and internal frame. To determine the permeability of frozen soil, the outer frame is made in the form of a hollow double-walled guide, the wall gap of which is filled with a viscous non-freezing substance, and the upper part of the guide is equipped with a cover.

The device is inconvenient "in operation, since the guide must be installed at the research site in the fall; the research results are distorted, because part of the test plot is covered with a waterproof substance. In addition, the device cannot be used for surveying on steep slopes.

The prototype of the proposed technical solution is a device for determining the water permeability of soils, which includes enclosing elements in the form of two split cylinders, between which there is a ring with a diaphragm stretched over it from an elastic waterproof material.

The disadvantage of the device is that it cannot be used on steep slopes, as well as in winter to determine the permeability of frozen soils.

The aim of the invention is to expand the functionality of the device through its use in winter and on steep slopes.

The goal is achieved by those. that the device containing the enclosing element having a cylindrical wall is equipped with a heating element installed in the lower part of the wall of the enclosing element, and vertical partitions placed around the inner cavity of the enclosing element.

1792532 AZ

Figure 1 shows the proposed device, section; figure 2 is the same, top view.

The proposed device contains a cylindrical pipe 1 with a sharpened bottom end. The inner cavity of the pipe is divided by partitions 2 into sectors 3. A heating element 4 is mounted in the lower part of the outer wall of the pipe 1, for example, an electric spiral, which is connected by a wire 5 to a power source (not shown in the drawing),

The device works as follows.

Using wire 5, the device is connected to an electricity source (for example, to a battery of batteries) and heated to a temperature at which it will freely enter the frozen soil (approximately 200-300 ° C). The cylindrical pipe is immersed in the soil strictly vertically, regardless of the surface relief, and left to cool completely. After settling down, each sector is filled with water and its consumption for filtration into the soil is monitored. At the end of the measurements, the devices are reheated and removed from the soil.

The device provides measurement accuracy regardless of the time of year and surface topography. the measuring volume is divided into small sectors, and the whole device is immersed in the heated soil.

Claims (1)

Claim A device for determining the permeability of frozen soils, containing a fencing element having a cylindrical wall, characterized in that, in order to expand its functionality due to its use in winter and on steep slopes, it is equipped with a heating element installed in the lower part of the wall of the enclosing element, and vertical partitions located in the inner cavity of the enclosing element. Fig. 1 FIG. 2