SU1217982A1 - Apparatus for investigating soils - Google Patents

Description

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The invention relates to the construction, in particular, to devices for studying the physicomechanical properties of soils with a rotational slice.

The purpose of the invention is to expand the functionality, increase the information content and reliability of research.

FIG. 1 shows a soil survey device, a general view; in fig. 2 - the same, top view.

The device contains a polar core 1 and blades 2 fixed on it, made in the form of plates. The ends are bent around the semicircle in the direction of rotation. The blades 2 are fixed on the rod 1 tangentially parallel to each other and are provided with plates 3 of an electric capacitor placed in pairs on the inner sides of the blades symmetrically with respect to the rod 1 and at least one radius from it. The plates 3 of the capacitor are fixed on the blade x 2 through the isodusive layer.

The device works as follows.

After embedding the device in the ground to the plates 3 electric

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the capacitor is supplied with current and the electrical resistance and the dielectric constant of the soil are determined by the electrical capacitance method. Uca

5 these characteristics are further used to calculate the moisture and porosity of the soil. Then, a torque is applied to the rod 1 and the device begins to rotate

10 hour hand. In this case, the shearing forces applied to the blade m 2 are directed normally to their surface. As a consequence, the shearing force is expended only

15 to overcome adhesion forces and internal friction of the studied soil. After measuring the maximum torque value and the set torque, the rotation of the stop is poured. The device is then removed to the next depth interval and the operatives are repeated.

The device can also be used in alternation with drilling, and pressurized it intermittently to the bottom of a well.

The use of the invention allows to increase the information content and reliability of the test results.

30 due to their complexity and production of experience at one point of the cut.

cpus.2

Editor M.Kelemes

Compiled by G. Martynova

Tehred O. Niece Proofreader L. Patay

Order 1091/36. Circulation 642 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035 Moscow, Zh-35, Raushsk, Embankment, 4/5

Branch PSh1 Patent, Uzhgorod, Proektna St., 4

Claims (1)

DEVICE FOR RESEARCH OF SOILS, including a rod and blades fixed on it with rounded ends, characterized in that, in order to expand functionality, increase information content and reliability of studies, the blades are equipped with electric capacitor plates placed pairwise on the inner sides of the blades symmetrically relative to the rod and at a distance from it at least one of its radius, and the blades are mounted on the rod tangentially parallel to each other. > ί