RU2715783C1 - Method and device for feeding binding substances for strengthening soil - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to construction of roads, pavements, sports fields, etc., and in particular to reinforcement of soil. Method of feeding binder for soil reinforcement is characterized in that a device for feeding binding substances is brought into action, ground is ground, binding substances are supplied and mixed with soil, a device for feeding binding substances from soil is removed. Prior to adding binder substances, their parameters and quantity are calculated, during soil grinding, part of soil is removed from under device for supply of binding substances, to consolidate soil, dry loose substances and viscous suspensions are added with addition of drill cuttings from different vessels via pipelines connected to device for supply of binding substances with one main line.EFFECT: technical result consists in reduction of labor intensity while ensuring high efficiency of technical reclamation of various types of soils.11 cl, 3 dwg

Description

The invention relates to the field of construction of roads, pavements, sports fields, etc., and in particular to methods and devices designed to strengthen the soil [E01C 3/04, E01C 21/00, E01C 23/10, E02D 3/12] .

Technical improvement of soils (English soil improvement) - a science that develops the theory and methods of targeted improvement of the composition, physical condition and physico-mechanical properties of soils in accordance with the requests of various types of construction in order to positively change the quality of certain sections (volumes) of the geological environment that have experienced technogenic impact of various profiles.

Soil EQUIPMENT AND STABILIZATION PROCESS FOR SOIL [MD4494 (B1), Published: 06/30/2017], which contains a cylindrical rotor (1) with a housing (2), a baffle plate (3) and a leveling board (4) forming a chamber, are known from the prior art for milling, grinding, introducing a stabilizer based on natural organic compounds into the soil and its homogenization. On the rotor (1), the teeth are fixed with a displacement along a helical line with opposite winding directions. On the housing (2), in the upper rear part of the chamber, nozzles (7, 8) are connected at an angle and are connected to the control system. The process of soil stabilization includes grinding the soil, mixing it and introducing a stabilizer based on natural organic compounds into the soil with their subsequent homogenization using a control system that provides control and optimization of the flow rate, pressure and degree of grinding of the stabilizer based on natural organic compounds.

The disadvantage of the analogue is the low effectiveness of strengthening soil of medium depth and deep occurrence, due to features in the design of equipment and the stabilization process.

A SOIL IMPROVEMENT METHOD is also known [JP 2010168809 (A), Published: 08/05/2010], characterized in that the feeding material is formed by mixing aggregate, such as gravel, crushed stone or the like, with cement milk with a predetermined mixing ratio using a hopper. 7 attached to the top of the casing 4 using a construction soil improvement machine provided with the casing 4, which can be inserted into the ground. Then, the feed material, which is formed by mixing aggregate, such as gravel, crushed stone or the like, with cement milk with a given mixing ratio, is loaded from the hopper 7 into the casing 4, and the casing 4 is inserted into the ground. Then re-drawing / backfilling is repeated when the feed material is unloaded from the inserted casing 4, and the solidification dump is prepared in the ground. Thus, soft soil can be improved to a stable soil using the soil improvement method by preparing the site of solidification piles.

The disadvantage of the analogue is the high complexity, due to the need to lay the casing for the subsequent pouring of a hardening solution into it.

The closest in technical essence is the METHOD FOR CLEANING CONTAMINATED SOIL [JP 2003285044 (A), Publ .: 07.10.2003], in which a mixing device comprising a shaft body 2, supported vertically, blades 4 mounted near the lower part of the shaft body 2, almost vertically penetrates soil contaminated with harmful substances. The blades are driven by the engine 5 around the axis of the soil, the soil 21 is crushed by pumping water under high pressure from the holes in the blades. Then, the soil is mixed and mixed with the treatment fluid coming from the vessel 14 and, thus, the contaminants come into contact with the cleaning agent in the treatment fluid for cleaning. After the cleaning treatment is completed, the suspension containing the fixing agent is injected from the mixing suspension mixing apparatus 15, and the mixing device is removed. The suspension is pre-mixed with a cleaner for harmful substances. Then the suspension is fixed, thereby preventing the re-influx of harmful substances due to circumstances and the supporting strength of the soil is strengthened to improve the soil.

The main technical problem of the prototype is the low efficiency of soil consolidation requiring replacement (mechanical strengthening), due to the inability to supply dry binders with a device that implements the proposed method.

The objective of the invention is to eliminate the disadvantages of the prototype.

The technical result of the invention is to reduce the complexity while providing high efficiency technical reclamation of various types of soils.

The specified technical result is achieved due to the fact that the method of supplying a binder to strengthen the soil, characterized in that they drive the feeder of binders, grind the soil, feed binders and mix them with the soil, remove the feeder of binders from the soil, characterized by the fact that before the introduction of binders, their parameters and quantity are calculated, during the grinding of the soil part of the soil is removed from under the binder feeder to strengthen Dry bulk solids and viscous slurries with the addition of drill cuttings from different tanks through pipelines connected to the binder feed device by one line are fed into the soil.

In particular, the parameters and amount of binders are calculated based on the quality of the soil to be strengthened and the required strength.

In particular, partial soil extraction is performed with the possibility of ensuring uniform mixing of binders with the soil.

In particular, when feeding viscous suspensions, pressure is maintained in the line.

In particular, the supply of binders through pipelines and pipelines is controlled by shutoff valves.

In particular, the mixing of soil and binder is carried out at a depth of up to 10 m.

The specified technical result is achieved due to the fact that the device for supplying binders for strengthening the soil, containing a mixing device with blades for loosening and mixing the soil, a feeding device and a container for a binder, characterized in that the mixing device contains conical drums mounted on a lifting rotary device, screw ridges of screws are made on the surface of the drums along the ridges of which blades are mounted for loosening and mixing the soil, between binder feed pipe is mounted by means of drums, connected to a feeding device made in the form of a screw pump unit, inside of which there are lines for sludge and bulk products, connected at the inlet and outlet of the screw pump unit to a common highway and separated from each other and from a common highway shut-off valves, a screw is mounted inside the slurry line, the screw pump unit is connected by pipelines to parallel metering units for bulk solids and drill cuttings, o divided from each other by isolation valves, solids dosing unit connected to a silo for storage of granular substances, the dosing unit drill cuttings is connected to the tank of the drill cuttings.

In particular, the lifting and turning device is made in the form of an excavator boom.

In particular, conical drums are mounted on the shafts of hydraulic motors.

In particular, the blades for loosening and mixing the soil are made L-shaped.

In particular, stop valves are made in the form of valves.

A brief description of the drawings.

In FIG. 1 schematically shows a binder feeder for strengthening soil.

In FIG. 2 schematically shows a screw pump unit.

In FIG. 3 shows a general view of the conical drums on an excavator boom.

The figures indicate: 1 - silo, 2 - injection pump, 3 - unit for dispensing bulk solids, 4 - high pressure pipeline, 5 - screw pump unit, 6 - installation with hydraulic motors, 7 - excavator, 8 - common line, 9 - capacity with drill cuttings, 10 - pump, 11 - drill cuttings dosing unit, 12 - cuttings line, 13 - screw mechanism, 14 - valves, 15 - excavator boom, 16 - conical drums, 17 - blades, 18 - screw, 19 - bulk line.

The implementation of the invention.

The binder feeder for strengthening the soil contains conical drums 16 (see Fig. 3) mounted on the boom of the excavator 15 in its lower part and connected by shafts to the hydraulic motors 6 (see Fig. 1). On the surface of the conical drums 16, screw ridges of the screws are made 18. L-shaped blades 17 are mounted along the screws 18. On the boom of the excavator 15 with hydraulic motors 6, a pipeline is connected between the conical drums 16 and connected to the screw pump unit 5.

The screw pump unit 5 (see Fig. 2) contains a housing (not shown in the figures) inside of which a line for sludge 12 and a line for bulk products 19 are made, interconnected at the inlet and outlet of the screw pump unit 5 into a common line 8, while the highway for sludge 12 and the highway for bulk products 19 are separated from the common highway 8 at the inlet and outlet of the screw pump unit 5 by valves 14. Inside the highway for sludge 12, a screw mechanism 13 is mounted.

The common line 8 at the inlet of the screw pump unit 5 is connected by a high pressure line 4 (see Fig. 1) through a valve 14 to a unit for dispensing bulk solids 3. To the line of high pressure 4 through a line for sludge 12 is connected a block for dosing drill cuttings 11.

The unit for dispensing bulk solids 3 is connected by a pipeline to a silo 1 for storing bulk solids and with an injection pump 2.

The unit for dispensing drill cuttings 11 through the valve 14 is connected by a pipeline to the pump 10, which, in turn, through the valve 14 is connected to the tank with drill cuttings 9.

The supply of binders to strengthen the soil is as follows.

The main pump of the excavator, through an additional section, oil pipelines and gearboxes (not shown in the figures) drive the hydraulic motors with conical drums 16 (see Fig. 3) and lower the boom of the excavator 15 into the ground. L-shaped blades 17 mounted along the screws 18 break and grind the soil, and the screws 18 remove part of the soil from under the conical drums 16 as they are deepened into the soil.

At the same time, as they deepen, binders are fed into the zone of intensive mixing between the drums 16 from the hopper by the compressor through the high pressure pipe 4 and mixed uniformly with the soil. The supply of binders is carried out dosed depending on the characteristics of the stabilized soil, while the parameters of the introduction of binders and their amount are calculated before work.

To supply dry bulk solids from silo 1 (see Fig. 1) for storing bulk solids, using an injection pump 2 and a dosing unit 3, substances for soil stabilization are pumped through a high pressure pipeline 4 through a screw pump unit 5 to a unit with hydraulic motors 6. The screw pump unit 5 is idling, i.e. bulk mixtures on a common highway 8, without the participation of a screw mechanism, are fed to the installation with hydraulic motors 6.

To supply viscous suspensions with the addition of drill cuttings from a tank with drill cuttings 9 by a pump 10, through a batching unit of drill cuttings 11, the suspension is fed through a high pressure pipe 4 through a screw pump unit 5 to a unit with hydraulic motors 6. The screw pump unit 5 operates in a loaded mode, those. the suspension through a common line 8, is fed into the line for sludge 12 (see Fig. 2), into the screw mechanism 13 and then to the installation with hydraulic motors 6, while the screw mechanism 13 provides pressure in the high pressure pipe 4 due to more viscous characteristics of the suspension and added drill cuttings.

The supply of binders from the silo 1 and the tank with drill cuttings 9 through the high pressure pipe 4, the lines for the cuttings 12 and in the screw pump unit 5 are controlled by valves 14.

EFFECT: reduced labor intensity while ensuring high efficiency of technical reclamation of various types of soils is achieved by providing the possibility of simultaneous supply of stabilized soils of medium depth and deep bedding, depending on their qualities, dry bulk substances and / or viscous suspensions with the addition of drill cuttings without the use of additional techniques and methods by deepening and uniformly mixing soil with conical drums 16 with screws 18 and L-shaped blades 17 and doses sintering the supply of binders from a silo for storing bulk solids 1 and / or a container with drill cuttings 9 along a common line 8 through a screw pump unit 5, while the dosed supply of binders is provided by the dosing blocks of bulk solids 3 and drill cuttings 11.

Claims (11)

1. The method of supplying a binder to strengthen the soil, characterized in that they drive the feeder of binders, grind the soil, feed binders and mix them with the soil, remove the feeder of binders from the soil, characterized in that before applying the binders their parameters and quantity are calculated, in the process of grinding the soil part of the soil is removed from under the binder supply device, dry bulk substances and viscous suspensions with the addition of drill cuttings from different tanks through pipelines connected to the supply of binders by one line. 2. The method according to claim 1, characterized in that the parameters and amount of binders are calculated based on the quality of the soil to be strengthened and the required strength. 3. The method according to claim 1, characterized in that the partial extraction of the soil is performed with the possibility of ensuring uniform mixing of binders with the soil. 4. The method according to claim 1, characterized in that when applying viscous suspensions, pressure is maintained in the line. 5. The method according to claim 1, characterized in that the supply of binders through pipelines and highways regulate shutoff valves. 6. The method according to claim 1, characterized in that the mixture of soil and a binder is performed at a depth of up to 10 m 7. A device for supplying binders for strengthening the soil, comprising a mixing device with blades for loosening and mixing the soil, a feeding device and a container for a binder, characterized in that the mixing device contains conical drums mounted on a lifting and rotary device, on the surface of the drums screw screw ridges, along the ridges of which blades are mounted for loosening and mixing the soil, a connection feed pipe is mounted between the conical drums substances connected to the feeding device, made in the form of a screw pump unit, inside of which there are lines for sludge and bulk products, connected at the inlet and outlet of the screw pump unit to a common line and separated by shutoff valves from each other and from the general line, inside the line a screw is mounted for sludge, a screw pump unit is connected by pipelines to parallel dispensing units for bulk solids and drill cuttings, separated from each other by shutoff valves, a dosing unit granular substances is connected to a silo for storing granular substances, the unit for metering drill cuttings is connected to a tank with drill cuttings. 8. The device according to claim 7, characterized in that the lifting and turning device is made in the form of an excavator boom. 9. The device according to claim 7, characterized in that the conical drums are mounted on the shafts of the hydraulic motors. 10. The device according to claim 7, characterized in that the blades for loosening and mixing the soil are made L-shaped. 11. The device according to claim 7, characterized in that the shutoff valves are made in the form of valves.

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