SU111866A1 - The method of determining the physicomechanical properties of soils in field conditions and the device for implementing the method - Google Patents

Description

Known methods for accelerated field testing of the physicomechanical properties of soils are usually based on the elimination of moisture by drying the soil samples, followed by testing in air.

The described method makes it possible to speed up and simplify the field testing process by the fact that all testing operations are carried out in the same environment. To eliminate the effect of moisture on the performance of certain soil properties, a soil sample is diluted in water. The air in the pores of the soil escapes in the form of bubbles, and the water in the pores of the soil combines with the aqueous medium. If it is necessary to determine the degree of soil moisture, the sample is weighed without access of the aqueous medium, after which it is diluted in water, the weight of the solid phase of the soil is determined, and the degree of its moisture is determined from the data obtained.

To implement the proposed method, a device is used, made in the form of a field laboratory assembled in a portable case from an anticorrosive material with a set of required instruments and instruments, and the case serves as packaging for their transportation and as a vessel for testing.

FIG. 1 shows a disassembled device; in fig. 2 - lever with sleepers.

The case p /, divided by a partition into two parts, is attractive for packaging the device during transportation and as a vessel for testing. The lid of the case is at the same time an auxiliary vessel for testing.

Tank 3 is used to fill with an aqueous medium when weighing a test soil sample and determining the angle of repose.

A soil sample is put into vessel 4 for weighing in air and water.

The device has a lever with four weights: 6 weights for wet soils (VL, 7 weights

for the solid phase (skeleton) of clay, humus and sandy soils (SC), weight 8 for grain size distribution (GH) and calibration weight 9. The lever has a number of scales for determining the individual indicators of the physical properties of soils.

For sifting sand in water, a set of sieves 10, 11, 12, 13: 14 and 15 is used.

In determining the volumetric weight of prob, a regime 16 is used (two copies). A cylinder 17 with a sharp edge, a retractable lid 18 and a plexiglass tube 19 with a scale of 20 c paned on it; it is suitable for determining 1 and filtration coefficient at different water temperatures.

The drummer, consisting of the weight 21, the precast rod 22, 23 l / ilotne load the test sample with a broken structure.

The third round is 25 Irimsp. CTC in a slurry agitator.

Bracket 26 with a cone holds the sieve together and serves to determine the top of the plasticity limit.

The height of the capillary lift is determined by the help of a rubber tube 28 with a funnel 29, p) of the rim 30 and a clip 31.

The device also used clamping screw 32.

The clamp 33 serves to install the cylinder 17 in determining the height of the capillary lift.

A sample is loaded into the rectangle 34 when determining the angle of repose of the sands.

With the help of a trellised glass 35, a sample of sand loaded into the device is moistened.

The device also has an auxiliary vessel 36, a knife 37, a tray for the cutting cylinder 38 and a thermometer (not shown in the figures).

All idle parts of the device are packed in case 1, which is closed by a cover 2 and placed in a bag of tarpaulin, kojemite or other material.

Subject invention

1. A method for determining the physicomechanical properties of soils under field conditions, distinguishing (1c with the fact that, in order to accelerate the field testing process and simplify them, all operations for testing the studied soils are carried out in an aqueous medium, for which some of the properties of the soil, the soil sample is diluted in water, the air in the pores of the ground goes out in the form of bubbles, and the water in the soil pores is combined with one medium; and, if necessary, determine the degree of ti soil sample of soil is weighed without access aqueous medium, after which the sample is diluted in water, determined by weight of the solid phase primer and the data obtained exhibit an extent of its humidity.

2. Device d.: 1 implementation of the method according to c. 1, made in the form of a field laboratory assembled in a portable case of anticorrosive material with a laboratory required for testing devices and tools, characterized in that in a box serving as packaging during transportation and as a vessel for testing, a set of devices and tools This unit is made from: a reservoir for obtaining an aqueous medium during soil extraction and determination of the angle of repose; soil container when weighed in air and water; levers with scales and weights for determining wet soils, solids, granometric composition and calibration; a sieve kit for sifting sand samples in an aqueous medium; cutting cylinders for sampling; a cytindra with a lattice lid and a transparent tube with scales for determining the filtration coefficient; drummer to seal sand samples; staples with a cone for bonding screens and determining the upper plasticity limit; thermometer and a number of auxiliary parts required for testing.

FIG. 2

- to.

, Hrsh