RU2663977C2 - Ground test and of non-disturbed structures sampling device in the well with the reactive power automatic compensation - Google Patents

Abstract

FIELD: building; instrument making.SUBSTANCE: invention relates to the field of engineering surveys, namely to the foundation soil surveys on the construction site and the undisturbed structures specimens sampling that are produced in difficult, hard-to-reach, constrained conditions. device consists of a body in the form of a pipe, divided into two parts by the sealed partition, in the body lower part the screw plug with internal left-handed thread is arranged, into which a screw with the left-handed thread is screwed in, and in the body upper part the plug is screwed in, having an n-edges opening serving to pass the n-edges shaped drive shaft, which is configured to move longitudinally within the body upper part and in the lower part having the threaded portion with a washer, nut and cotter pin to prevent spontaneous dropping out, at the top, the drive shaft has a cylindrical part ending with the thread for installation and fixing of the anchoring device, consisting of a body mounted onto the drive shaft cylindrical part, eyelets for the anchor blades fixation, compression spring located on the drive shaft between having the n-edge opening plug and the anchoring device body.EFFECT: technical result is reduction in weight and the possibility of manual using in the production of engineering geological and geotechnical surveys in hard-to-reach areas and cramped conditions.5 cl, 2 dwg

Description

The present invention relates to the field of engineering surveys, namely to studies of the foundation soil at the construction site and sampling of undisturbed structures produced in difficult, inaccessible, cramped conditions by means of portable and self-propelled small-weight units, when the required pressure on the bottom of the well exceeds the weight of the rig or manual work when the creation of the necessary load is physically impossible.

Known technical solutions for crushing samplers, soil pumps, dies and probes using standard drilling rig methods use the mass of the rig itself to compensate for the reactive force, which eliminates the possibility of sampling the undisturbed structure by the crushing method when working with portable and self-propelled low-weight rigs or when doing work manually.

For the production of static soil tests in wells and crushing of soil pumps by installations with insufficient weight for this, there are technical solutions with devices for anchor devices outside the research point, followed by fixing the unit to the anchor. [one]; [2]

Anchors are screws, screws drilled into the ground. The disadvantages of this scheme are:

1. the impossibility of conducting the test manually;

2. the need to drill at least one soil anchor at a point other than the test point, followed by mounting the rig to it;

3. the need to remove the anchor after the experiment with the rearrangement of the rig for this.

4. liquidation of the hole from the soil anchor, and in the case of work on the built-up area - restoration of the road surface

as a result of the measures according to p. 1.1-1.3, for one test, three mounting and dismounting of the drilling rig are carried out (two above the anchor with significant loss of time) and two holes remain for liquidation.

Closest to the proposed invention, the technical solution is a device for sampling rocks from wells [3]. This device uses a cable block system for anchoring into the walls of the well.

The cable block system is an outdated, very complex and voluminous structure, requiring a well with a significantly larger diameter than the diameter of the soil carrier. Also, this solution assumes the presence of a winch, which is absent in the overwhelming number of small machines. The use of this method and device in manual work is excluded.

The aim of the invention, namely, the Device and method for soil testing and sampling of the undisturbed structure in the well with automatic compensation of reactive force (hereinafter referred to as the Device), is a method for implementing the following tasks:

1. creating the necessary pressure on any regular sampler, soil-carrier, core projectile with the aim of crushing it into the ground for sampling of an undisturbed structure (monolith);

2. creating a test load on the bottom (stamp tests, static sounding) and well walls (pressiometric studies).

3. uniform load on the face and crushing of soil bumps without jerking and warping;

4. Compensation of reactive power in the production of actions according to p. 1-3. without the need for the construction of additional anchor and loading devices.

5. use of standard drilling equipment of uniform diameters;

6. the ability to use in hard-to-reach places and when working manually - low weight and gain in strength.

The essence of the alleged invention is to solve the above problems using the Device by means of normal right-hand rotation with any rotary drilling rig, a hand-operated drill using a drill (such as the “Geologist's drill” set) or a pipe wrench, without the need to create a load on the face and without any or additional measures for anchoring or loading.

Crushing occurs evenly, without pressure surges, with a big gain in strength, due to the use of a screw jack, which allows one to perform useful actions by one or two workers.

In FIG. 1 shows a section of the proposed Device.

In FIG. 2 shows an enlarged Anchor device.

The device consists of the following nodes and components:

A. The body of the device, in the form of a pipe of the required diameter and length, divided into two parts by an airtight Baffle 1 to prevent getting into the Lower part of the A1 housing, filled with grease, soil and fluids from the well and drainage holes 2 in the upper part of A2, above the airtight Baffle 1, to remove particles of soil and fluids inevitably falling into the Upper Part A2. Screw plug 3 is screwed into the lower part of the housing A1 with an internal left-hand thread (supporting, rectangular or trapezoidal). Plug 4 is screwed into the upper part of the housing A2 of the device with the upper part freely rotating on the thrust bearing. In Cork 4 there is an n-faced hole, which serves to pass the Drive Shaft B, transmit rotation and free movement of the Drive Shaft B up and down (in the drawing, a more technologically advanced hexagonal section is used).

B. A screw with a left-hand thread (supporting, rectangular, or trapezoidal) screwed into the screw plug 3. Screw B has a unified right-hand drill thread at the lower end for screwing a standard adapter adapter type Ш - hexagonal adapter, or П - threaded (onto which the necessary screw tool - any regular soil-carrier, sampler, core pipe, stamp, probe), the upper part is made without thread to exclude spontaneous loss of Screw B in case of maximum eversion. Screw B has a through hole along the entire length for the cable to pass, if any electronic recording device is used at the lower end of the device, such as a pressure sensor, pressure sensor, static probe. The hole also serves to pass all kinds of probes and facilitate the device and, if not necessary, can be closed with plugs.

B. The drive shaft of an n-faced profile, similar to the cross section of the hole of the Plug 4, with the possibility of longitudinal movement within the Upper part of the housing of the device A2. The drive shaft in the lower part has a threaded section with the washer 8, nut 9 and cotter pin 10 to prevent spontaneous loss of the device A. The upper part of the drive shaft has a cylindrical part 12 for donning the anchor device G, ending with an external thread for fixing the anchor device G with a lock nut 11 and screwing on a standard conversion adapter of type P (threaded) or W (hex) to connect the Device to the drill string. The drive shaft B has a through hole along the entire length for the cable to pass, if any electronic recording device is used at the lower end of the device, such as a pressure sensor, pressure sensor, static probe. The hole also serves to pass all kinds of probes and facilitate the device and, if not necessary, can be closed with plugs.

D. Anchor device, consisting of Case 13, put on the Cylindrical part 12 of Drive Shaft B and having Lugs 14 for fastening from two to four Anchor vanes 15 with Bolts 16. The anchor device is suspended by a Compression Spring 17 located on Drive Shaft B between Cork 4 and the Housing 13 Anchor device, to prevent spontaneous breeding of Anchor blades 15 under its own weight Anchor device G during tripping operations. Anchor blades 15 have holes 18 for bolting to them, if necessary, broadening linings (in the case of a large diameter of the well, the presence of caverns, soft soils) or mounting recording sensors (pressure sensors, pressure sensors, etc.).

The operating procedure of the alleged invention (Device and method for soil testing and sampling of undisturbed structures in the well with automatic compensation of reactive force):

1. The device is lowered to the bottom of the well on the drill, while the spring 17 is compressed under the weight of the projectile and the anchor blades 15 are spread apart to the maximum, abutting against the walls of the well;

2. the right rotation is applied to the drill by any mechanical method, either manually using the “Geologist's drill” set screwdriver or pipe wrench;

3. the right rotation through the drive shaft B is transmitted to the housing of the device A, as a result of which the screw B begins to extend, having a left-hand thread;

4. Screw B, encountering soil resistance through a screwed-on device (any standard soil-carrier, sampler, core pipe, stamp, probe) feeds up Device A body;

5. The housing of the device A moving upwards wedges the Anchor blades 15, which, when introduced into the walls of the well, create a reaction;

6. at the moment when the counteraction of the Anchor blades 15, which have a known larger area than the tool at the bottom of the well, exceeds the capabilities of the soil resistance at the bottom of the well, Screw B begins to do useful work by crushing the device into the test soil (any regular soil sampler, sampler, core pipe, stamp, probe);

7. upon reaching the required depth of sampling, or the depth of the test, go to step 9;

8. upon reaching the maximum eversion of Screw B, it begins to rotate together with the Case of device A, tearing the selected soil sample from the array;

9. Having completed the useful work of claim 7 or 8, the rotation stops, the drill is lifted, which entails the driving shaft B, freely moving upward in the splines of the plug 4, dragging the Anchor device G through the Case 13, leading the Anchor blades 15 out of the wedging interaction with the housing of device A and eliminating the spacer in the walls of the well;

10. The leading shaft B lifted further rests against the Washer 8 by the Washer 4 and carries the entire device along with the screwed-up device (any standard soil carrier, sampler, core pipe, stamp, probe);

11. after lifting the Device to the surface, Screw B, previously cleaned of soil particles, is wrapped and the Device is ready for a new cycle of operation.

Information sources

1. RU (11) 2446251 (13) C1

http://www.fips.rU/Archive/PAT/2012FULL/2012.03.27/DOC/RUNWC1/000/000/002/446/251/DOCUMENT.PDF;

2. RU (11) 2258113 (13) C1

http://www.fips.ru/Archive/PAT/2005FULL/2005.08.10/DOC/RUNWC1/000/000/002/258/113/DOCUMENT.PDF:

3. USSR copyright certificate No. 3332351, cl. EB21 49/02, 1970.

http://www.findpatent.ru/patent/98/987086.html

Claims (5)

1. A device for soil testing and sampling of an undisturbed structure in a well with automatic reactive force compensation, consisting of a housing in the form of a pipe divided into two parts by a sealed partition, a screw plug with an internal left-hand thread, into which a screw with a left-hand thread is screwed, is installed in the lower part of the body threaded, and in the upper part of the casing a plug having an n-faced hole is screwed in, which serves to pass the drive shaft of an n-faced profile made with the possibility of longitudinal movement within the upper parts of the casing and having a threaded section with a washer, nut and cotter pin in the lower part to prevent spontaneous loss, in the upper part the drive shaft has a cylindrical part ending in thread for mounting and fixing the anchor device, consisting of a housing installed on the cylindrical part of the drive shaft, eyes for mounting anchor blades, a compression spring located on the drive shaft between the tube having an n-hole, and the body of the anchor device. 2. The device according to p. 1, characterized by the presence of an adapter in the lower part of the screw jack in the form of a thread (for standard transfer transitions of type P) or a hexagon (for standard transfer transitions of type Sh) for fastening any sampler, soil pump, stamp, probe, core pipe . 3. The device according to p. 1, characterized by the presence of holes on the anchor blades for attaching broadening nozzles when using the device in wells of large diameters significantly exceeding the diameter of the device, as well as soil pressure sensors, pressure gauges, indenters and other equipment for testing soils composing the walls of the well . 4. The device according to claim 1, characterized by the presence of drainage holes above the sealed partition of the body for discharge, which inevitably fall into the upper part of the body of fluids from the well. 5. The device according to p. 1, characterized by the presence of a through hole (channel) through the entire device for passing the necessary cables and probes to the bottom, if necessary, the hole (channel) can be plugged on both sides.

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