SU1449636A1 - Drilled-in pressiometer - Google Patents

Abstract

The invention relates to devices for studying the physicomechanical properties of soils during engineering and geological surveys. The aim of the invention is to improve the performance of the soil test. The burrowed pressiometer contains a hollow sectional auger column with rock-breaking tips, rigid punches with stops, a mechanism for the extension of punches in the form of an extracting rod with barbs and a wedge bar with a through hole and a groove for barbs. The screw blade flange is partly made with flanging and has straight hollow sections. Hard stamps are flush with flared. The device is equipped with load and measuring devices. 3 il. S (l

Description

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i The invention relates to devices for studying the physicomechanical properties of soils in engineering geological surveys.

The purpose of the invention is to test the performance of the soil.

FIG. 1 shows a pressiometer, a general view; in fig. 2 is a section A — A of HJa of FIG. one; in fig. 3 is a section BB in FIG. 2

The pressuriometer contains a hollow sectional auger column 1 with a rock-breaking pin 2, a blade-flange screw 3 is secondly formed with a flange 4 and has straight hollow sections, rigid dies 5 with stops 6, mounted flush with a brace, 4, a hollow section, a fixed die 5 with lugs 6, mounted flush with a brace, 4, a hollow section, a fixed dies 5 with lugs 6, mounted flush with a brace 4, a hollow section, a fixed punch 5 with lugs 6, mounted flush with a brace, 4, a hollow section, a fixed dies 5 with lugs 6, mounted flush with a brace 4, a hollow section, a fixed punch 5 with lugs 6, mounted flush with a brace, 4, a hollow section, a fixed die 5 with lugs 6, mounted flush with a clamp, and a hollow section, a set of stitches 5 with lugs 6, mounted flush with a clamp, 4 as a draw rod 7 with barbs 8 and wedge grids 9 with a through hole 10 and a groove 11 under the bores 8, each of which interacts with a die stop by means of a guide 12 of the type a tail and is placed along the spine with | ekschsh osevo- columns, with r | of movement. The load device contains a power hydro; f1 13 double-sided action with a c1 through hole in the rod interacting with a pull rod and an oil bench (not shown). The measuring devices contain an indicator of 14 displacements and a pressure gauge (not x). The extracting rod 7 is elongated with the possibility of axial displacement along the through holes of 10 kpin and 9 and interacting with each of them with the small barbs 8. Each abutment 6 is placed in the cavity of the straight section of the blade Rebor Dy with the possibility of rotation.

Flanging 4 on the first round of wines -. the blades follow the rock-cutting tip 2, the leading cutting edge sharpened by the warmer, and the subsequent leading rims sharpened outside.

 The burrowed pressiometer works as follows.

With the help of the rotator of the drilling rig, the screw column 1 is immersed to the full depth of the soil mass under study. At the same time, the leading lipoMxa flanging 4 on the first turn of the screw blade of the screw closes the lateral surface of the earth wall

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well, preparing it for the study with a minimally disturbed structure, and the subsequent flanging serve as a centralizer and protect the walls of the well from breaking down, priir they due to external sharpening of the leading edge.

Then, due to the presence of grooves 11. Under the barbs 8, the rod freely passes through the holes 10 of the wedge g to the level of the lower wedge gland. After that, by turning the extracting rod 7 to 180, the tabs 8 are removed from the groove 11 of the lower link and the load device is mounted, passing the extracting rod through the hole of the rod of the power hydraulic cylinder 13 and fixing it with a nut. The measuring device is installed with the possibility of measuring the movement of the exhaust rod.

By creating load steps on the hydraulic cylinder 13, with the help of the extracting rod 7 with barbs 8, the wedge rod 9 and the stop 6 transfer force to the stamp 5, crushing it into the ground.

The readings of the measuring devices (pressure and deformation) are taken at the moment of stabilization of the state of the soil at each step of the load. At the end of the experiment, the hydraulic cylinder conducts the return of the punch 5 and the wedge rod 9 to the initial position. Thereafter, the rods 8 are inserted into the keyway 11 by turning - the draw rod 7 by 180 °, the rod is pulled to the level of the next wedge rod, the rod is pulled out of the wedge groove by the rod 180 and pressed. ground by the following stamp, etc.

Claims (1)

Thus, the soil is tested at full depth with an interval determined by the location of the dies 5 along the length of the auger column 1. Claims A burr-down pressiometer comprising a hollow sectional column with blades made with flanging, a rock-breaking tip, an extracting rod, rigid dies with stops, a mechanism for moving the dies, a load and measuring device differing in what 144 u with the fact that, in order to increase the productivity of the soil test, the blades of a sectional column have straight linear hollow sections along its length, rigid punches are mounted flush with the blade on the straight sections of the blade, and the stops of the punches in the cavities of linear sections, while S 1449636 The stretching rod is made with barbs, the mechanism for extending each stamp with a through hole and a groove and is placed in the cavity of the column section with the ability to interact with the stamp stop and the barbs of the extracting rod, and the flanging of the blades at each interval is made with an outwardly pointed edge. / V Fiz. one FIG. 2 .J