SU607879A1 - Device for testing frozen soils under conditions of three-axis compression - Google Patents

Description

one

The invention relates to the field of construction and in particular to devices for determining the physicomechanical properties of frozen soils.

Devices are known for testing soils with TpexocHoiro grades, including a housing, a test chamber, a rubber casing, a hydraulic system, and a measuring device i.

The drawback of the device is the inability to carry out tensile tests.

The closest technical solution to the invention is a device for testing frozen soils under the conditions of triaxial; 3: compression, including a housing with covers, a pressure chamber, a load device, a pressure source, and measuring instruments pj. A disadvantage of this device is the lack of the possibility of determining the tensile forces during lateral compression of the sample, as well as its complex structure.

The aim of the invention is the possibility of determining the forces of stretching during lateral

compressing the sample and simplifying the design of the device.

This is achieved by the fact that in a device for testing frozen soils under conditions of three-axis compression, including a housing with covers, a working chamber, a high pressure chamber, a load device, a pressure source and measuring instruments, the load device is made in the form of elastic chambers and associated with them by means of connecting elements of punches, the elastic chambers being mounted inside the body on its covers, and the punches are placed along the vertical axis of the working chamber w 1 of low pressure,

iHa drawing shows the device common d.

Claims (1)

The device consists of a casing / cylinder 1, with a high pressure working chamber 2 placed in it, a load device, a load setting system and measuring: o device. The loading device consists of elastic chambers 3, in contact with the covers 4 and elements 5 connected to the punches. The load crushing system includes cylinders 7 with gearboxes, connected to a tank with 8 microns and pressure gauges 9. The measuring device consists of two 10-hour incicators. The device operates as follows: Pre-sn in the cover 4 of the cylinder 1, element 5 with an elastic chamber 3 ,. Punch 6 and the upper lid of the high-pressure working chamber 2, place the frozen soil sample on the lower punch 6. Then close the lid to the high-pressure working chamber 2 and fasten it with bolts. Antifreeze liquid is poured into the working chamber 2 and a punch 6 is inserted. A pad 5 is installed on it and the cover 4 of the cylinder 1 is fixed, after which hoses with containers 8 filled with antifreeze fluid are connected. The assembled working chamber, with tanks connected to it, is placed in a refrigerator and connected to cylinders located outside the refrigerator. In order to create a vertical load, it is necessary to open the air supply valve in the appropriate container and set the required pressure. To create the necessary lateral pressure in the working chamber, open the valve of the second cylinder. The magnitude of the deformation of the sample is recorded by the watch type 10 indicators. In the event that the lateral pressure is set to be more vertical and sufficient to stretch the sample, the elastic chambers operate as pressure sensors. The readings are taken from the corresponding monometer and indicators. The application of the proposed device allows us to simplify the design and make pro compact and autonomous that. makes it possible to install it in a conventional I-YOU REFRIGERATOR when conducting tests of frozen soils. Claims device for testing frozen soils under three-axis compression conditions, including a housing with covers, a working chamber, a high chamber, pressure, a load device, a pressure source and measuring instruments, so that it is possible to determine the force: lateral compression of the sample and simplify the design of the device, the load device is implemented in the form of elastic chambers and associated with them by means of connecting elements of punches, and elastic chambers can ted within the housing at its lids and punches are arranged on the vertical axis of the high pressure working chamber. Sources of information taken into account in the examination; 1. Lomtadze VD. Methods of laboratory studies of the physico-mechanical properties of rocks., Nedra, L, 1972, p., 63-265. 2, Copyright certificate N 491О8О, Е 0213 1/02, 1973.