SU998650A1 - Apparatus for rupture testing of soil - Google Patents

Description

(54) DEVICE FOR GROUND TESTING OF GROUND

The invention relates to the construction, namely, devices for studying the physicomechanical properties of soils, and can be used in the development of measures to combat wind erosion of peat-bog soils.

There is a device for testing a ground for breaking, containing a movable and stationary cuvette with grippers, a ring mounted between them, as well as a rupture device with a force indicator, the cuvettes being provided with hooks with a grooved surface rigidly fixed on the inner surface of the bases of the cuvette i.

The disadvantage of this device is that when examining materials, the sample is broken only in the vertical direction, in which it is necessary to take into account the inconstant weight of the movable cell with the part of the sample torn off. which complicates the test and reduces the measurement accuracy.

The closest to the invention in technical essence and the achieved effect is a device for testing soil for breaking, including a movable and stationary cuvette with grooved pins, having a bearing unit, a support unit located on the axis, a rupture device and a force indicator C2j.

In the known device through the gap between the axis and the hole in the movable cell during the preparation of the soil sample for testing and

10 is compressed, it is penetrated by soil particles, the bearings are clogged, and they also provide direct resistance when particles in the gap are jagged. When testing a sample, sticking is observed.

15 material per axis in the section of the gap.

This negatively affects the accuracy of the measurements and requires periodic disassembly of the cuvette unit in order to flush the sub-binders and clean the axis.

The aim of the invention is to improve the measurement accuracy by eliminating the ingress of particles of the test material into the bearing unit 25 of the support unit.

Claims (2)

The goal is achieved by the fact that a device for testing a soil for breaking, including a movable and stationary cuvette with corrugated pins, having a bearing unit, a support unit, located on the axis of the rupture device and a force indicator, is provided with a detentor consisting of a forked hub and a sleeve connected between each other is a dummy with knitting needles, with the forked hub mounted on a fixed ditch, the sleeve is mounted on the axis of the support block, and in its case longitudinal grooves are formed, in which the disc spokes are placed, with This one end of the axis of the support block is located at a distance from the body of the movable cell. Figure 1 shows the device, a general view; figure 2 - unit cuvette ;, on fig.Z - view A in figure 2. A ground test device for breaking a gap consists of block 1 of a discontinuity cuvette 2 with a measuring unit (not shown), a raopbfcj 3 square, a calibration unit 4, and a ti 1: adjustment reference points b. The block 1 of the cuvette (Fig. 2) includes the following 7 and the movable 8 cuvette, having uniformly distributed pins 9 with a grooved surface on their bottoms, an axis 10 fixed to f; cinopHOM unit 11 using an axle / .ger-cattel consisting of a sleeve 12 of a disk 13, with hubs 14, grooves 15 and a forked hub 16. A precipitator hub is located between the bearings 17 of the support unit 11, and the detenting wheel 13 with the spokes 14 is placed in the grooves 18 of the housing 19 with the flat surface 20 and with the nut 21 of the support block 11, the fork hub of the guard is secured with the help of locking screws 22 on the fixed cell 7,. which is located intermediate ring 23, the disk 24 and the base 25, is installed in the bracket 26 and fixed by the grip 27. The device operates as follows. Using the adjusting support screws b (Fig. 1), CTpo.ro establishes the horizontal position of the plate vry 3 devices. Then, the cuvette block 1 is removed from the device and the locking screw 22 is screwed in (FIG. 2) until it is removed from the fixed cuvette 7. The fixed cuvette 7 is mounted on a special device in the press (not shown), the intermediate height is imposed on it the ring 23 is used to fill the soil (material under study) to the upper edge of the ring. The loose soil sample is placed on the cuvette 8 assembled with the support block 1 and the de-holder. On the end face 20 of the movable cell 8, a fitting cup (not shown) is mounted, the support rods of which pass through the slots 15 (FIG. 3) of the disc 13 of the holder. Then a press (not shown) is turned on, the metered pressure from which is transmitted to the movable cell and the material being tested, causing it to seal to the required value. After that, the cuvette block 1 is released from the auxiliary devices (the Sne are shown), removed from the press, the stopper is fixed on the fixed cuvette 7 and the block 1 is installed in the device in its original position. Next, the movable cuvette of the unit is connected by means of a 5 with a rupture device 2 (Fig. 1) for testing the sample in a gap with a force recording indicator (not shown). The indicator of the measuring unit captures an electrical signal proportional to the breaking strength of the soil sample. In connection with the exclusion of particles of the test material in the bearing unit of the support unit, the proposed device allows to keep the calibration factor constant. When calculating the strength of the sample, to break, which will increase the accuracy of the readings and the reliability of the device. the ability to measure the tensile strength of a sample with increased accuracy and more effectively carry out studies of the physicomechanical properties of peat-bog soils with the aim of developing egropri Tille to combat wind erosion. Apparatus for testing a tensile test, including a movable and stationary cuvette with grooved pins, having a bearing assembly, an axial support unit, a discontinuous device and a force indicator, characterized in that, in order to improve measurement accuracy by eliminating particles of the material under study in the sub-unit node of the support block, it is equipped with a stopper, consisting of a forked hub and sleeve, interconnected by a disc with spokes, with the forked hub fixed and on a fixed ditch, the sleeve is installed on the axis. the support block, and in its case longitudinal grooves are formed, in which the disc spokes are placed, with one end of the axis of the support block located at a distance from the body of the movable cell. Sources of information taken into account in the examination 1. USSR author's certificate number 739365, cl. G 01 N 3/08, 1978. 2. USSR author's certificate 851181, class E02 D 1/02, 1 979 (prototygl.