CN218945917U - Stirring machine for in-situ remediation of deep soil - Google Patents
Stirring machine for in-situ remediation of deep soil Download PDFInfo
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- CN218945917U CN218945917U CN202222972976.8U CN202222972976U CN218945917U CN 218945917 U CN218945917 U CN 218945917U CN 202222972976 U CN202222972976 U CN 202222972976U CN 218945917 U CN218945917 U CN 218945917U
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Abstract
The application relates to a stirring machine for in-situ remediation of deep soil, which comprises a frame, a drilling tool and a feeding device, wherein the drilling tool comprises a drilling rod and a drill bit connected to the lower end of the drilling rod, the upper end of the drilling rod is arranged on a power device on the frame, and the power device is used for driving the drilling rod to rotate; the drill rod is characterized in that a spiral blade is connected to the outer side wall of the drill rod, a plurality of material conveying channels which are not communicated with each other are formed in the drill rod, a discharge hole which is communicated with the material conveying channels is formed in the bottom of the drill rod, close to the drill bit, along the spiral blade, and the feeding device is used for inputting materials with different components into each material conveying channel. Can solve the problem that the repairing agent can not be mixed in advance before application through structural transformation of stirring machinery aiming at the sticky and heavy polluted soil with higher water content.
Description
Technical Field
The application belongs to the technical field of soil heavy metal pollution in-situ treatment, and relates to a stirring machine for in-situ remediation of deep soil.
Background
Soil restoration methods commonly used in the industry include solidification/stabilization techniques, safe landfill techniques, cement kiln co-treatment techniques, and the like. The adoption of safe landfill requires a large amount of land, and the site selection of the landfill site is difficult and the investment is high; the cement kiln co-treatment process has the requirements on the concentration of the polluted solid waste entering the kiln, the treatment period is longer, and the application of the cement kiln co-treatment of arsenic slag is limited; the curing/stabilizing technology has wide application range, has no strict requirements on components, and only needs to establish a simple curing and stabilizing treatment place, so the method has wider application in engineering.
The solidification/stabilization technology is generally divided into in-situ treatment and ex-situ treatment, the depth of the in-situ treatment is shallow, the amount of excavation stirring engineering required by the ex-situ treatment is large, and if the advantages of the solidification/stabilization in-situ treatment and the ex-situ treatment can be combined, the large-area excavation and the deep depth can be treated, so that the engineering amount is greatly reduced, and the repair cost is reduced.
In the construction industry, cement, quicklime powder and the like are used as curing agents by a special deep stirring machine to forcedly mix with soft clay at the deep part of the foundation, so that the foundation of the reinforced area is hardened into a composite foundation with certain strength. The construction method is applied to projects such as roads, basement foundation pits, soil and water retaining curtains and the like, and has the advantages of no noise, no vibration, no pollution, high work efficiency, low cost and the like.
The construction method of the deep stirring machine is used for adding the repairing agent into the soil to treat the soil or the deep polluted soil of the tailing pond, and has the advantages of economy and feasibility. For example, in the reagent for treating arsenic pollution in soil, quicklime is often used as an alkaline regulator, ferrous sulfate hydrate is used as an auxiliary agent, and the direct mixing and dispensing of quicklime and ferrous sulfate hydrate can react in advance and generate heat, so that a conveying pipe is burst, and therefore, if each component of the reagent can be independently added into soil, and then stirred and mixed, the reaction is more sufficient and better.
Disclosure of Invention
The utility model aims to provide a deep stirring machine and construction method for soil normal position restoration, can be to the higher glutinous heavy contaminated soil of moisture content, through stirring machine's structural transformation solution repair agent can not be before applying the problem of mixing in advance.
In order to achieve the purpose, the application is realized by the following technical scheme.
The technical scheme of the application is to provide a stirring machine for in-situ remediation of deep soil, which comprises a frame, a drilling tool and a feeding device, wherein the drilling tool comprises a drilling rod and a drill bit connected with the lower end of the drilling rod, the upper end of the drilling rod is connected with a power device arranged on the frame, and the power device is used for driving the drilling rod to rotate;
the outer side wall of the drill rod is connected with a helical blade, a plurality of material conveying channels which are not communicated with each other are arranged in the drill rod, a discharging hole which is communicated with the material conveying channels is formed in the bottom of the drill rod, close to the drill bit, along the helical blade, and the feeding device is used for inputting materials with different components into each material conveying channel.
The stirring machine is provided with a plurality of material conveying channels, and can sequentially add medicines carried by the stirring machine to carry out in-situ treatment on the polluted soil, so that on one hand, the space and the excavation and transportation cost can be saved; on the other hand, the defect of the prior art can be overcome, and the repairing efficiency is improved.
As an implementation mode of the technical scheme, the number of the discharging holes is multiple, and at least one discharging hole is correspondingly communicated with each material conveying channel of the drill rod.
As an implementation mode of the technical scheme, a partition plate is arranged in the drill rod, and divides the interior of the drill rod into a plurality of material conveying channels.
Further, all the material conveying channels are arranged in a central symmetry mode by the rotation axis of the drill rod.
As an embodiment of the technical scheme, the feeding device comprises a plurality of storage bins, a conveying power assembly and a conversion control assembly, wherein the storage bins and the conveying power assembly are connected and the conversion control assembly is sequentially connected through a conveying pipe, and the conversion control assembly is connected with a conveying passage of a drill rod through the conveying pipe;
the storage bin is used for storing different component materials of the medicament, the conveying power assembly is used for conveying the component materials in the storage bin into the conveying channel through the conversion control assembly, and the conversion control assembly is used for carrying out consumption record of the component materials and conversion control between different conveying pipes.
As an implementation mode of the technical scheme, an independent feeding channel is adopted between each storage bin and a corresponding feeding channel of the drill rod to carry out component material conveying.
According to another technical scheme, the application provides a construction method for in-situ restoration of deep soil, and the construction method comprises the following steps of:
according to the pollution degree and the restoration depth of the soil, calculating the drilling depth in the restoration area and the dosage of the added restoration agent, and determining construction parameters;
starting a power device to drive the drill rod, and drilling to the repairing depth;
lifting the drill rod and reversely stirring, and simultaneously adding the first component material of the medicament, lifting to a preset height and stopping adding;
repeatedly stirring and sinking to a set restoration depth, lifting the drill rod, reversely stirring, simultaneously adding a second component material of the medicament, lifting to a preset height, and stopping adding;
repeating the previous step, and adding the rest component materials of the medicament;
repeatedly stirring again, sinking to the designed restoration depth, lifting the drill rod and reversely stirring to enable the medicament to be fully mixed with the soil.
The construction method is based on the principle that the soil remediation agent is injected into soft-base polluted soil by pressure and stirred at the same time, so that the soil remediation agent is fully and uniformly mixed, and the soil pollution toxicity is reduced by utilizing the physical and chemical reaction generated between the agent and polluted soft soil. In addition, aiming at the problems that the effect is weakened or lost due to chemical reaction between component materials of the repairing agent and other byproducts are generated, the conversion of different conveying pipes of the stirring machine can be utilized to realize the sequential addition of different component materials of the agent.
Different component materials of the medicament are respectively stored in different storage bins during use, the stirring depth and the addition amount of each medicament per linear meter are calculated on site according to the actual pollution degree, construction parameters such as drilling speed, lifting speed of powder spraying, pipeline pressure during lifting, sinking speed of repeated stirring and the like are determined through site test piles, and the powder spraying amount parameters of each conveying pipeline are converted and input into a conversion control assembly.
Firstly, starting a stirring drilling machine to drill to a restoration depth during stirring, turning over to loosen soil, reversely stirring component materials of a spraying agent during lifting the drilling machine, and controlling the spraying powder flow rate by a conversion control system; and then performing secondary drilling, reversely stirring other component materials of the sprayed medicament during secondary drilling, referring to the steps, performing the whole powder spraying process until the spraying is completed, repeatedly stirring and sinking to the designed restoration depth after the spraying of the medicament designed at the secondary site is completed, reversely stirring the drill to the ground surface, and detecting the restoration effect after the medicament and the polluted soil are fully mixed and maintained.
As an embodiment of the present technical solution, the construction parameters include one or more of a drilling speed of the drill pipe, a lifting speed of the drill pipe, a pipe pressure when the drill pipe is lifted, and a sinking speed when the stirring is repeated.
As an implementation mode of the technical scheme, in the process of starting the power device to drive the drill rod and drilling to the restoration depth, compressed air is input to the material conveying channel while drilling, and the compressed air sprayed from the discharging hole can disturb and loosen soil.
As an embodiment of the present technical solution, the method further includes the steps of: after maintaining for a certain time according to the reaction progress of the medicament and the soil, performing spot check on the repair area according to different depths, checking the effect after treatment, and if the related standard is met, finishing in-situ repair; if the result does not meet the relevant standard, repeating the steps.
The concrete construction process for in-situ restoration of deep soil by adopting stirring machinery comprises the following steps:
1. firstly, dividing a repair area according to soil pollution investigation results in the current period, and determining land area range, pollution degree, pollution depth, soil layer physical indexes and other information of different areas to be repaired;
2. in the repair area, setting the pile distance equal to the pile diameter, namely adopting the repair area to continuously distribute piles to ensure that the pesticide application stirring reaction of the polluted soil is fully carried out.
3. Aiming at the pollution degree and the restoration depth, calculating the piling depth of each area and the dosage of the restoration agent added per linear meter, and determining construction parameters such as drilling speed, powder spraying lifting speed, pipeline pressure during lifting, re-stirring sinking speed and the like through an on-site pile test;
4. starting a stirring drilling machine, spraying compressed air during drilling, and drilling to a restoration depth; the main purpose of the step is to disturb and loosen the soil body;
5. lifting a drill rod and reversely stirring, simultaneously starting powder spraying of the component materials A of the medicament, spraying the medicament while stirring, lifting to 50cm above a designed elevation, and stopping powder spraying, wherein the powder spraying means that the component materials A are sprayed out from a discharge hole along with air, and each component material of the medicament is generally fed in a powder shape;
6. repeatedly stirring and sinking to a set restoration depth, reversely lifting the drill bit, starting powder spraying of the component material B and stirring to the ground surface, rotating the drill rod in the forward direction under repeated stirring, and rotating the drill rod in the reverse direction under reverse stirring.
7. Repeating the previous step according to the repairing requirement, repeatedly stirring and sinking to a set repairing depth, reversely stirring and lifting the drill rod, and simultaneously starting the powder spraying and stirring of the component material C to the ground surface;
8. after the chemical designed at the secondary site is sprayed, repeatedly stirring and sinking to the designed restoration depth, and then reversing the lifting drill and stirring to the ground surface, so that the chemical is fully mixed with the polluted soil, and the stabilized powder spraying is finished;
9. according to the reaction progress of the medicament and the soil, after curing for a certain time, carrying out spot check on the treated area according to different depths, checking the effect after treatment, and if the effect meets the relevant standard, ending the stabilizing process; if the sampling inspection result does not meet the relevant standard, recalculating the medicament proportion and the medicament spraying amount, and repeating the steps 4 to 8.
The technical scheme has the advantages that the deep stirring machinery is used for treating the polluted soil, secondary pollution caused by cleaning disturbance in the ectopic treatment is avoided in the underground stirring treatment, and the influence on human bodies and the environment is reduced; secondly, in the effective pile diameter range, according to the quality of each meter of polluted soil, the dosage of the medicine can be accurately added, and compared with the injection medicine adding mode commonly adopted in the industry, the deeper soil can be treated; in addition, different medicament components are uniformly stirred with polluted soil through different conveying pipes, so that the adding sequence of medicaments is controlled, medicament loss is avoided, and a medicament effect is better realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic structural view of a stirring machine according to an embodiment of the present application.
Fig. 2 is a schematic view of a drill rod and a drill bit of the stirring machine according to an embodiment of the present disclosure.
Reference numerals illustrate:
11-walking underframe; 12-a pile driver stand;
20-feeding devices; 21-a storage bin; 22-a conveyor power assembly; a 23-transition control assembly; 24-a material conveying pipe;
30-a power plant;
41-drill pipe; 411-helical blades; 412-a discharge hole; 413-a feed channel; 414-separator; 42-drill bit.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which some embodiments of the present application are shown, and it is apparent that some, but not all embodiments of the present application are described. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes the technical scheme of the present application in detail with reference to the drawings and specific embodiments.
As shown in fig. 1 and 2, the present embodiment provides a stirring machine for in-situ restoration of deep soil, comprising a frame, a drilling tool and a feeding device 20, wherein the drilling tool comprises a drill rod 41 and a drill bit 42 connected with the lower end of the drill rod 41, the upper end of the drill rod 41 is connected with a power device 30 installed on the frame, and the power device is used for driving the drill rod 41 to rotate;
the outer side wall of the drill rod 41 is connected with a helical blade 411, a plurality of material conveying channels 413 which are not communicated with each other are arranged in the drill rod 41, a discharging hole 412 communicated with the material conveying channels 413 is formed in the bottom of the drill rod 41 along the helical blade 411 and close to the drill bit 42, and the feeding device 20 is used for inputting different component materials into each material conveying channel 413.
The number of the discharging holes 412 is plural, and at least one discharging hole 412 is correspondingly communicated with each material conveying passage 413 of the drill rod 41. It can be appreciated that one material conveying passage 413 may be connected to one material outlet 412, or one material conveying passage 413 may be communicated with two or more material outlet 412, and the position of the material outlet 412 may be selected according to practical situations.
In order to realize a plurality of feed channels 413 of the drill rod 41, a partition 414 is provided inside the drill rod 41, the partition 414 dividing the interior of the drill rod 41 into a plurality of feed channels 413. As such, each feed passage 413 extends along the length of the drill rod 41.
All feed channels 413 are arranged centrally symmetrically with respect to the axis of rotation of the drill rod 41. Since the drill rod 41 needs to be rotated, the symmetrical arrangement of the feed channels 413 ensures that the center of gravity of the drill rod 41 is located on the axis of rotation thereof in order to prevent the drill rod 41 from being eccentric during rotation.
The frame comprises a walking type underframe 11 and a pile driver vertical frame 12, the power device 30 is used for fixing the upper end of the drill rod 41 and driving the drill rod 41 to rotate, the power device 30 can drive the drill rod 41 to rotate in the forward direction and the reverse direction, and the power device 30 adopts conventional components in the field, and the structure of the power device is well known in the field and is not described here.
The feeding device 20 comprises a plurality of storage bins 21, a conveying power assembly 22 and a conversion control assembly 23, wherein the storage bins 21 and the conveying power assembly 22 are connected with the conversion control assembly 23 in sequence through a conveying pipe 24, and the conversion control assembly 23 is connected with a conveying passage 413 of the drill rod 41 through the conveying pipe 24.
The storage bin 21 is used for storing different component materials of the medicament, the quantity of the storage bin 21 can be selected according to the types of the component materials, the conveying power assembly 22 is used for conveying the component materials in the storage bin 21 into the material conveying channel 413 through the conversion control assembly 23, and the conversion control assembly 23 is used for carrying out the consumption record of the component materials and conversion control between different material conveying pipes 24.
Illustratively, the conveying power assembly 22 is used for sucking component materials from the storage bin 21 and outputting the component materials after being mixed with air, the conveying power assembly 22 can adopt a powder spraying machine in the prior art, the conversion control assembly 23 comprises a flowmeter, the flowmeter can be used for recording the consumption of the component materials, and the flowmeter can be connected with a control system of the stirring machine to realize automatic control.
Taking the repair of viscous arsenic-polluted soil with higher water content as an example, the process of in-situ repair of deep soil by adopting the stirring machine is described below.
The main component materials of the stabilizing agent for treating the arsenic-polluted soil comprise iron-based compounds, oxidizing agents and alkaline regulators. The oxidant can oxidize arsenite into arsenate under a wet and anaerobic environment, the arsenate and the iron base form a stable compound to stabilize arsenic, and an alkaline regulator is added to stabilize the pH value of the soil to be neutral.
Sodium persulfate is used as an oxidant, quicklime is used as an alkaline regulator, ferrous sulfate hydrate is used as an iron-based compound, all the components of the medicament are respectively injected into soft-base arsenic polluted soil or arsenic slag by pressure, and the components are stirred, so that the medicament and the polluted soil are fully and uniformly mixed to react by utilizing the physicochemical reaction generated between the powdery medicament and the polluted soft soil, and the arsenic pollution toxicity is reduced.
The high leaching concentration area of the arsenic smelting slag pollution project in a certain place is taken as a test place.
According to project site regulation data, a 20m multiplied by 20m region is selected and determined, the arsenic pollution depth of the selected region is 11.3 meters, the water content of polluted arsenic slag and soil is 17%, the concentration of arsenic leaching solution is 37.53mg/L, and the pH measured value is 3.63.
The agent for repairing according to the pollution degree comprises three component materials A, B and C, wherein A is 15 parts by mass of sodium persulfate, B is 70 parts by mass of ferrous sulfate heptahydrate, and C is 15 parts by mass of quicklime which are respectively placed in three storage bins 21. The medicine is added in an amount of 5%. The diameter of the stirring pile used for construction is 60cm, the pile distance is 60cm, 1184 stirring piles are driven on 20m multiplied by 20m working face, and the arsenic slag density is 1.8t/m 3 The dosage of the calculated reagent is 5Kg/m of sodium persulfate, 23Kg/m of ferrous sulfate heptahydrate and 5Kg/m of quicklime.
Starting the stirring drilling machine, spraying compressed air during drilling, and drilling to a restoration depth at a drilling speed of about 1.5 m/min;
when lifting, the conversion control component 23 opens the conveying pipe 24 of the A, powder spraying is carried out, stirring and lifting are carried out, the speed is 0.8m/min, lifting is carried out to be 50cm above the designed elevation, and powder spraying is stopped;
repeatedly stirring and sinking to the designed restoration depth, reversely rotating the lifting drill rod 41, simultaneously switching the control assembly 23 to open the material conveying pipe 24 of B, spraying powder and stirring to the ground surface; spraying quicklime on the conveying pipe 24 of the third time, so that the medicament is fully mixed with the polluted soil, and stabilizing and spraying are finished;
sampling and sampling after curing for 7 days, and detecting the content of leached arsenic in the stabilized sample according to the standard of the sulfuric acid and nitric acid method (HJ 299-2007) of the leaching toxicity leaching method of solid waste. The results showed that the leached arsenic content in the stabilized sample was 1.102mg/L and the pH of the stabilized sample was 6.35. The arsenic leaching concentration was reduced by 96.53% compared to before remediation.
The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (6)
1. The stirring machine for in-situ remediation of deep soil is characterized by comprising a frame, a drilling tool and a feeding device, wherein the drilling tool comprises a drilling rod and a drill bit connected to the lower end of the drilling rod, the upper end of the drilling rod is arranged on a power device on the frame, and the power device is used for driving the drilling rod to rotate;
the drill rod is characterized in that a spiral blade is connected to the outer side wall of the drill rod, a plurality of material conveying channels which are not communicated with each other are formed in the drill rod, a discharge hole which is communicated with the material conveying channels is formed in the bottom of the drill rod, close to the drill bit, along the spiral blade, and the feeding device is used for inputting materials with different components into each material conveying channel.
2. The stirring machine for in-situ remediation of deep soil of claim 1, wherein the number of discharge holes is plural, and each feed passage of the drill pipe is correspondingly communicated with at least one discharge hole.
3. The stirring machine for in-situ remediation of deep soil of claim 1 wherein a partition is provided within the drill pipe, the partition dividing the interior of the drill pipe into a plurality of feed channels.
4. A stirring machine for in-situ remediation of deep soil according to claim 3 wherein all of the feed channels are arranged centrally symmetrically about the axis of rotation of the drill pipe.
5. The stirring machine for in-situ remediation of deep soil according to claim 1, wherein the feeding device comprises a plurality of storage bins, a conveying power assembly and a conversion control assembly, the storage bins, the conveying power assembly are connected with a conveying pipe of the conversion control assembly in turn, and the conversion control assembly is connected with a conveying passage of a drill rod through the conveying pipe;
the storage bin is used for storing different component materials of the medicament, the conveying power assembly is used for conveying the component materials in the storage bin into the conveying channel through the conversion control assembly, and the conversion control assembly is used for carrying out consumption record of the component materials and conversion control between different conveying pipes.
6. The stirring machine for in-situ remediation of deep soil of claim 5 wherein each storage bin is transported with a separate feed channel between the feed channel of the corresponding drill pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222972976.8U CN218945917U (en) | 2022-11-08 | 2022-11-08 | Stirring machine for in-situ remediation of deep soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222972976.8U CN218945917U (en) | 2022-11-08 | 2022-11-08 | Stirring machine for in-situ remediation of deep soil |
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| CN218945917U true CN218945917U (en) | 2023-05-02 |
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| CN202222972976.8U Active CN218945917U (en) | 2022-11-08 | 2022-11-08 | Stirring machine for in-situ remediation of deep soil |
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