SU1733561A1 - Device for testing ground in a massif - Google Patents

Abstract

Use: determine the deformation properties of dispersed soils in engineering geological surveys. SUMMARY OF THE INVENTION: The device comprises a rod with horizontal handles and a paddle tip and covering its hollow tubular body with a supporting crosspiece. The racks are mounted symmetrically with respect to the body, equipped with brackets with blocks with cables fixed to them. One ends of the cables are connected to horizontal handles fixed to the clamp of the rod, and the other to load devices. An indicator is fixed on one rack to measure the movements of the blade under load. 2 Il.

Description

SP

with

The invention relates to engineering geology and can be used to study the deformation properties of soil in an array.

The purpose of the invention is to expand the functionality by determining the deformation properties of the soil.

FIG. 1 given the proposed device, the general form, section; in fig. 2 - the same, top view.

The device includes a thin blade 1, a disconnecting device 2 consisting of two crown bushings, a rod 3 and a crossbar 4 with cones 5. The hollow tubular body 6 and two posts 7 are fixed on the crossbar. The rod 3 is clamped with screws 8 by a clip in the form of heyx semirings rests on the upper body of the tubular body 6. Two horizontal screws are screwed into the clamp 9 symmetrically about the longitudinal axis

handles 10. On each rack 7 a console 11 is fixed, on which a block 12 with a cable 13 is mounted. One end of the cable 13 is mounted in handle 10, and the other end is clamped by a catch 14, through which hook 15 with a washer 16 and weights 17 are passed. On one of the racks 7 is also mounted holder 18 indicator 19 hour-type. The movable rod 20 of the indicator 19 rests on the handle 10. The gripper 14 and the hook 15 with the washer 16 and the weights 17 together constitute the load device.

At the lower end of the blade 1, as well as on its vertical edges, sharpening 21 and 22 are made in different directions from the longitudinal axis of the blade. When such a blade 1 is immersed, the structure of the soil in the areas of operation of the blade is preserved, and during the experiment, i.e. with axisymmetric horizon VI SA) CO SL O

talc at the intersection of the blade; a test of the soil of natural composition is performed.

Before testing the soil, the device is calibrated according to the deformation depending on the weight of the weights 17 installed on the two washers 16.

The device works as follows.

Using a drilling rig, the blade 1, the disconnecting tool 2 and the rod 3 are pushed together into the soil massif or into the soil below the bottom of the previously drilled well so that the blade 1 is located at the soil test mark. On the rod 3 is mounted above the ground part of the device (Fig. 1 and 2), while the cones 5 must be pressed into the ground,

Blade 1 creates a first pressure stage and records the deformation of the soil at regular intervals until it conditionally stabilizes. To do this, weights 17 are evenly placed on two washers 16, the mass of which corresponds to a given pressure level on the ground. The weight load of the weights 17 is transmitted to the blade 1 through the hooks 15, grippers 14, cables 13, knobs 10, clamp 9, rod 3 and disconnecting device 2. Under the action of this load, the blade 1 turns horizontally in a clockwise direction and deforms the ground on opposite sides of each half of the blade 1. Indicator 19 register the deformation of the soil under the loaded blade 1.

The soil test at this elevation is performed at least at four different pressure stages on the blade 1.

Then determine the amount of friction of the rod 3 on the ground. For this, the weights 17 are removed from the washers 16, the screws 8 are loosened, the rod 3 is moved upwards by 2-3 cm (the disconnecting device 2 is triggered, i.e. the bar 3 is uncoupled with the blade 1) and the bar 3 is clamped resting against the upper end of the tubular body 6. On the washers 16, the weight of the weights 17 of the pores is increased until their mass reaches the value at which the knobs 10 begin to move

clockwise in the horizontal plane.

At the end of the testing of the soil, the above-ground part of the device is dismantled. The blade 1 with the tripping device 2 and the rod 3 is pressed into the ground to the new mark of the test or removed from the array. The test results determine the deformation properties of the soil.

The use of the proposed device in comparison with the known provides the ability to determine the deformation properties of the soil in an array or below the bottom of a pre-drilled well when the blade is pressed into the soil, creating and maintaining time pressure levels, as well as fixing the soil deformation at certain time intervals after creating a constant soil pressure steps and testing unstable soils at several depths.

Claims (1)

Claims An apparatus for testing soil in an array, including a bar with two horizontal handles, connected to a paddle tip using a mechanical disconnecting device, and a measuring device that differs so that, in order to extend the functionality by determining the deformation properties of the soil it is provided with a tubular body enclosing the rod, fixed on a crosspiece, having a cone on the bottom surface and racks mounted on it symmetrically relative to the body, and the rod is provided with a locking clip resting on the upper end of the housing, the racks are equipped with horizontal consoles on which blocks with cables are fixed, one ends of which are connected to horizontal handles fixed on the boom clamp, and others with load devices, and a measuring device in the form of a displacement indicator mounted on one of the racks which rests on an appropriate horizontal handle. 3 2 V / FIG. 2