Electro-osmosis reinforcing device and method for controlling soil parameter gradient

Abstract

The invention relates to the technical field of environmental protection engineering construction, and discloses an electro-osmosis reinforcement device and method for controlling the soil parameter gradient, the electro-osmosis reinforcement device comprises an electro-osmosis device, a comprehensive sensor and at least one high-pressure injection unit, and a transverse pipe in the high-pressure injection unit is arranged between any two adjacent anodes; the nozzle is used for spraying adjusting liquid in the horizontal direction and the vertical direction. The water content, the conductivity and the pH value of the soil body are monitored in real time through the pre-buried soil comprehensive sensor, liquid injection adjustment is automatically started when the parameter gradient exceeds the threshold value in combination with the limit gradient parameter determined through a pre-test, the soil body parameter gradient is maintained in an ideal interval, control and dynamic adjustment of the reinforcement process are achieved, and the reinforcement effect is improved. The problems of electrode polarization, resistance increase and current decrease caused by overlarge parameter gradient in the electroosmosis process are solved, and the continuity of the electroosmosis efficiency is ensured.

Description

Technical Field

[0001] This invention belongs to the field of environmental engineering construction technology, specifically relating to an electroosmotic reinforcement device and method for controlling soil parameter gradients. Background Technology

[0002] Electroosmosis is a widely used technique for reinforcing soft soil foundations. Under the influence of a direct current electric field, hydrated cations in the soil migrate directionally towards the cathode, driving the flow of pore water and accelerating soil drainage and consolidation. However, as the reinforcement process progresses, the soil parameter gradient reaches its limit, and the anode area becomes excessively dry. This leads to a sharp deterioration in the electrical contact conditions between the anode and the soil, resulting in a significant increase in interfacial contact resistance. According to Ohm's law, under constant voltage, the total current approaches zero due to excessive loop resistance, the driving force for electroosmosis disappears, the drainage process terminates, and electroosmosis fails. Furthermore, the soil in the middle to cathode region cannot adequately drain from the anode to cathode direction.

[0003] Publication No. CN102182174B discloses a method for composite foundations using chemical solution injection electroosmosis combined with crushed stone piles. This method involves inserting metal electrodes into crushed stone piles and injecting chemical solutions such as calcium chloride and sodium silicate. The synergistic effect of electroosmosis and chemical reaction enhances soil strength. However, the injection point is limited to the interior of the crushed stone pile, and the solution cannot actively and precisely regulate soil parameters in different regions between the anode and cathode, making it difficult to address the problem of decreased electroosmosis efficiency caused by excessive parameter gradients. Publication No. CN107587498A discloses a system for reinforcing soft clay using anode pressurization combined with electroosmosis. This method introduces high-pressure gas into the anode tube, causing water to be squeezed out towards the cathode tube. Drainage efficiency can be further improved through electrode switching and flocculant injection. This scheme uses gas pressurization to drive water migration, but it does not involve active regulation of soil moisture content, conductivity, and pH gradients, failing to address the electroosmosis failure caused by excessive drying and increased resistance in the anode area.

[0004] Therefore, there is an urgent need for an electroosmotic reinforcement device that can monitor changes in soil parameters in real time and actively regulate the gradient of soil parameters between the anode and cathode. Summary of the Invention

[0005] The purpose of this invention is to provide an electroosmotic reinforcement device and method for controlling soil parameter gradients to solve the problem that the soil parameter gradient between the positive and negative electrodes prevents the soil from draining and consolidating properly.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows: According to a first aspect of the present invention, an electro-osmotic reinforcement device for controlling soil parameter gradients is provided, comprising: An electroosmosis device includes a DC power supply, an array of anodes and cathodes, which are electrically connected to the positive and negative terminals of the DC power supply, respectively, to generate a DC electric field and cause an electrolytic reaction, which causes hydrated cations in the pore water of the soil to migrate directionally from the anode to the cathode. The integrated sensor includes at least a moisture content measurement module, a conductivity testing module, and a pH testing module. The integrated sensor is set between the anode and the cathode to monitor changes in moisture content, conductivity, and pH parameters in the soil during the electro-osmotic reinforcement process. And at least one high-pressure injection unit, wherein the horizontal tube in the high-pressure injection unit is disposed between any two adjacent anodes for injecting conditioning liquid in both the horizontal and vertical directions.

[0007] In some embodiments, the high-pressure injection unit includes a main pipe, a bend, a horizontal pipe, and a high-pressure pump; The first end of the main pipe is connected to the high-pressure pump, and the second end is connected to the bend. The bend connects the main pipe and the horizontal pipe; The horizontal tubes are arranged in an array in the soil along a direction perpendicular to the soil surface, and a bend is provided between any two adjacent horizontal tubes.

[0008] In some embodiments, the horizontal tube is arranged symmetrically along the line connecting any two adjacent anodes.

[0009] In some embodiments, a spray pipe is provided on the side of the horizontal tube; The jet pipes are arranged in an array along the length of the horizontal pipe and parallel to the soil surface. The axis of the injection pipe is inclined at 30° to 60° to the axis of the horizontal pipe, and the vector directions of the projections of the injection pipes on the horizontal pipe axis on both sides of the line connecting two adjacent anodes are opposite.

[0010] In some embodiments, a valve is provided on the bend in the high-pressure injection unit that is connected to the main pipe, for controlling the on / off state of each injection unit.

[0011] According to a second aspect of the present invention, an electro-osmotic reinforcement method for controlling soil parameter gradients is provided, comprising: S1. Install anodes, cathodes, integrated sensors, and high-pressure jetting units in the soft soil to be reinforced; S2. Obtain the ultimate gradient of soil parameters through preliminary tests and determine the injection pressure of the conditioning fluid; S3. Electroosmotic reinforcement is carried out by energizing, and soil parameters are monitored in real time and the parameter gradient between the anode and cathode is calculated. S4. When the parameter gradient reaches the preset start threshold, start the high-pressure pump and spray the conditioning fluid into the surrounding soil through the jet pipe on the horizontal pipe until the parameter gradient falls back to the preset target range and then stop the injection. S5. Repeat steps 3 and 4 until the soil moisture content near the cathode reaches the predetermined requirement. S6. Recycle after reinforcement is completed.

[0012] In some embodiments, the pre-test in step S2 includes: In some embodiments, a pair of electrodes are inserted into the soil for electroosmotic reinforcement until the cathode drainage rate decreases to a threshold. At this point, the water content, electrical conductivity, and pH value of the soil near the anode and cathode are measured, and the parameter gradient is calculated as the limiting gradient.

[0013] In some embodiments, the preset initiation threshold in step S4 is 2 / 3 of the limit gradient, and the preset target interval is 1 / 3 to 1 / 2 of the limit gradient.

[0014] In some embodiments, the injection of conditioning liquid into the surrounding soil through the injection pipe on the horizontal pipe in step S4 is provided with a gap between the injection streamline formed by the injection conditioning liquid and the anode.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses a pre-embedded soil integrated sensor to monitor the soil's moisture content, electrical conductivity, and pH value in real time. Combined with the limit gradient parameters determined by pre-tests, it automatically initiates liquid injection adjustment when the parameter gradient exceeds the threshold, maintaining the soil parameter gradient within the ideal range. This achieves control and dynamic adjustment of the reinforcement process, solving the problems of electrode polarization, increased resistance, and decreased current caused by excessive parameter gradients during electroosmosis, and ensuring the continuity of electroosmosis efficiency.

[0016] 2. This invention uses multi-layer high-pressure injection pipes to inject conditioning liquid at multiple points and in multiple layers into the soil between the anode and adjacent anodes. This can actively adjust the soil's moisture content, conductivity, and pH value, reduce the parameter gradient between the anode and cathode, improve the uniformity of the reinforcement effect, avoid energy waste caused by excessive resistance, improve energy utilization efficiency, and recycle the electrodes and injection pipes after reinforcement is completed, thus achieving green construction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar structure of the device of the present invention; Figure 2 This is a schematic cross-sectional view of the device of the present invention; Figure 3 This is a schematic diagram of the horizontal tube structure of the present invention.

[0018] Figure label: Electroosmosis device 100, integrated sensor 200, high-pressure jetting unit 300, main pipe 310, bend pipe 320, valve 321, horizontal pipe 330, jetting pipe 331, high-pressure pump 340, jetting flow line 400, soil 500. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0020] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” means two or more. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The words “above” and / or “below” and similar terms are for ease of description only and are not limited to a location or spatial orientation. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0021] The technical concept of this invention includes: Under the influence of a DC electric field, an electrolytic reaction occurs on the electrode surface. An acidic environment is generated at the anode (H₂O → 4H₂O). + +O2+4e The cathode generates an alkaline environment (2H₂O + 2e⁻). →2OH (+H2). Excess hydrated cations in the soil pore water migrate directionally towards the cathode, generating electroosmotic flow. As the reinforcement process continues, the soil's moisture content, conductivity, and pH value create a "self-reinforcing" gradient expansion effect between the anode and cathode, causing the anode area to tend towards a "dry, acidic, high-resistance" state, while the cathode area tends towards a "wet, alkaline, low-conductivity" state. This leads to technical problems such as a sharp increase in contact resistance, current approaching zero, electroosmotic failure, uneven reinforcement, and increased energy consumption.

[0022] To this end, this invention proposes an active control technology concept based on real-time monitoring and dynamic regulation: by deploying comprehensive soil sensors in the soil between the anode and cathode, the moisture content, conductivity, and pH parameters are acquired in real time, and a parameter gradient feedback control mechanism is established in combination with the limit gradient threshold determined by pre-experiment. At the same time, multiple layers of high-pressure injection pipes are set in the soil between the anode and the adjacent anode, and the regulating liquid is injected into the soil at multiple points and in multiple layers through injection holes on the horizontal pipe using a high-pressure pump, so as to actively adjust the moisture content, conductivity, and pH value of the local area, so that the parameter gradient between the anode and cathode is always maintained in the ideal range.

[0023] Based on the above concept, this invention can effectively maintain the electroosmotic driving force during the reinforcement process, achieve uniform consolidation of the soil as a whole, improve the efficiency of power utilization, and recycle all injection fluid and electrode materials after construction, thus having good economic and environmental benefits.

[0024] This application provides an electroosmotic reinforcement device for controlling the gradient of soil parameters. The electroosmotic device 100 includes a DC power supply 110, an array of anodes 120 and cathodes 130. The anodes 120 and cathodes 130 are respectively electrically connected to the positive and negative terminals of the DC power supply 110 to generate a DC electric field and cause an electrolytic reaction, so that hydrated cations in the 500 pore water of the soil migrate directionally from the anodes 120 to the cathodes 130. The integrated sensor 200 includes at least a moisture content measurement module, a conductivity testing module, and a pH testing module. The integrated sensor 200 is located between the anode 120 and the cathode 130 and is used to monitor the changes in moisture content, conductivity, and pH parameters in the soil 500 during the electro-osmosis reinforcement process. And at least one high-pressure injection unit 300, wherein the horizontal tube 330 of the high-pressure injection unit 300 is disposed between any two adjacent anodes 120 for spraying conditioning liquid in the horizontal and vertical directions.

[0025] This invention uses a pre-embedded soil integrated sensor to monitor the moisture content, conductivity, and pH value of soil 500 in real time. Combined with the limit gradient parameters determined by pre-experiments, it automatically initiates liquid injection adjustment when the parameter gradient exceeds the threshold, maintaining the parameter gradient of soil 500 within the ideal range. This achieves control and dynamic adjustment of the reinforcement process, solving the problems of electrode polarization, increased resistance, and decreased current caused by excessive parameter gradient during electroosmosis, and ensuring the continuity of electroosmosis efficiency. By injecting adjustment liquid at multiple points and in multiple layers through multi-layer high-pressure jet pipes into the soil 500 between the anode and adjacent anodes, the moisture content, conductivity, and pH value of soil 500 can be actively adjusted, reducing the parameter gradient between the anode and cathode, improving the uniformity of the reinforcement effect, avoiding energy waste caused by excessive resistance, improving energy utilization efficiency, and allowing the electrodes and jet pipes to be recycled after reinforcement, achieving green construction.

[0026] The electro-osmotic reinforcement method for controlling soil parameter gradients described in this application includes the following steps: S1. Install anode 120, cathode 130, integrated sensor 200 and high-pressure injection unit 300 in the soft soil to be reinforced; S2. Obtain the 500-parameter limit gradient of the soil through preliminary tests and determine the injection pressure of the conditioning fluid; S3. Electroosmotic reinforcement is carried out by energizing, and the soil parameters are monitored in real time and the parameter gradient between the anode and cathode is calculated. S4. When the parameter gradient reaches the preset start threshold, start the high-pressure pump 340 and spray the conditioning liquid into the surrounding soil 500 through the jet pipe 331 on the horizontal pipe 330 until the parameter gradient falls back to the preset target range and then stop the injection. S5. Repeat steps 3 and 4 until the soil near the cathode reaches the predetermined moisture content at 500°C. S6. Recycle after reinforcement is completed.

[0027] The following is in conjunction with the appendix Figures 1 to 3 This application provides a detailed description of an electro-osmotic reinforcement device and method for controlling soil parameter gradients.

[0028] In this embodiment, an electroosmotic reinforcement device for controlling soil parameter gradients is provided, including an electroosmotic device 100, a comprehensive sensor 200, and a high-pressure jetting unit 300.

[0029] Specifically, the electroosmosis device 100 consists of a DC power supply 110 and an array of anodes 120 and cathodes 130. The anodes 120 and cathodes 130 are connected to the positive and negative terminals of the DC power supply 110 via wires, respectively. The anodes 120 and cathodes 130 are inserted into the soil 500, with each anode 120 and cathode 130 arranged in a one-to-one correspondence. When energized, a DC electric field is formed in the soil 500, causing hydrated cations in the pore water of the soil 500 to migrate directionally towards the anodes 120 and cathodes 130, thereby driving the pore water to flow out.

[0030] The integrated sensor 200 integrates a moisture content measurement module, a conductivity testing module, and a pH testing module. Multiple sensors are embedded at representative locations between the anode 120 and the cathode 130, spaced evenly in both horizontal and vertical directions, to monitor changes in the moisture content, conductivity, and pH parameters of the soil 500 during the electro-osmotic reinforcement process in real time. The integrated sensor 200 connects to an external control unit, transmitting the monitoring data to the control system for analysis and processing.

[0031] The high-pressure injection unit 300 includes a main pipe 310, a bend 320, a horizontal pipe 330, and a high-pressure pump 340. The first end of the main pipe 310 is horizontally connected to the output end of the high-pressure pump 340, and the second end is connected to the bend 320. The bend 320 is a flexible pipe used to connect to the horizontally positioned horizontal pipe 330. The horizontal pipe 330 is a rigid pipe, horizontally arranged between different layers of the soil 500, layered along a direction perpendicular to the surface of the soil 500. Any two adjacent horizontal pipes 330 are connected by the bend 320, forming a multi-layered horizontal injection structure. The horizontal pipes 330 are positioned between any two adjacent anodes 120 and symmetrically arranged along the line connecting the two anodes 120 to ensure that the conditioning fluid can be uniformly injected into the soil 500 area near the anodes on both sides.

[0032] Multiple injection pipes 331 are arranged on the side of the horizontal pipe 330. The injection pipes 331 are arranged in an array at equal intervals along the length of the horizontal pipe 330, with a spacing of approximately 30-40 cm between adjacent injection pipes 331. The axis of the injection pipes 331 is inclined at 30°-60° to the axis of the horizontal pipe 330, and the vector directions of the projections of the injection pipes 331 located on both sides of the line connecting two adjacent anodes 120 on the axis of the horizontal pipe 330 are opposite. This results in the injected conditioning liquid forming a cross-shaped network of injection streams 400 in the soil 500, with a wider coverage and more uniform distribution. In addition, a valve 321 is installed on the bend 320 connected to the main pipe 310. This valve 321 is electrically connected to the control system and can automatically adjust its on / off state based on the real-time feedback data of moisture content, conductivity, and pH value from the integrated sensor 200. It can independently control the injection start and stop of each layer of the horizontal pipe 330 according to the actual adjustment needs of the soil at different depths, realizing closed-loop injection in layers and regions.

[0033] In this embodiment, an electro-osmotic reinforcement method for controlling soil parameter gradients is provided, comprising the following steps: S1. Install anode 120, cathode 130, integrated sensor 200 and high-pressure injection unit 300 in the soft soil to be reinforced; S2. Obtain the 500-parameter limit gradient of the soil through preliminary tests and determine the injection pressure of the conditioning fluid; S3. Electroosmotic reinforcement is carried out by energizing, and the soil parameters are monitored in real time and the parameter gradient between the anode and cathode is calculated. S4. When the parameter gradient reaches the preset start threshold, start the high-pressure pump 340 and spray the conditioning liquid into the surrounding soil 500 through the jet pipe 331 on the horizontal pipe 330 until the parameter gradient falls back to the preset target range and then stop the injection. S5. Repeat steps 3 and 4 until the soil near the cathode reaches the predetermined moisture content at 500°C. S6. Recycle after reinforcement is completed.

[0034] Specifically, in step S1, during actual construction, the soft soil site to be reinforced is first surveyed. Samples are taken at different depths to test the initial moisture content, electrical conductivity, and pH value of the soil 500, providing basic data for subsequent pre-tests. Before formally carrying out large-area reinforcement, a pair of electrodes are driven in for on-site pre-tests. Electroosmotic reinforcement is carried out continuously with electricity until the drainage rate near the cathode decreases significantly. At this time, the moisture content, electrical conductivity, and pH value of the soil 500 near the anode 120 and cathode 130 are measured, and the parameter limit gradient between the anode and cathode is calculated. At the same time, the output pressure of the high-pressure pump 340 required to spray the conditioning liquid to a predetermined distance through the injection pipe 331 on the horizontal pipe 330 of the multi-layer high-pressure injection pipe in the soil 500 is determined through experiments. This ensures that the injection stream can penetrate the soil 500 to a certain distance, but does not directly reach the anode 120, avoiding excessive electrolytic water generation at the anode, which would lead to oxygen accumulation and cause the anode to detach from the soil 500.

[0035] After the preliminary test, anodes 120 and cathodes 130 were deployed in the area to be reinforced according to the actual engineering requirements. The anodes 120 and cathodes 130 were arranged alternately to form an electroosmotic array. A high-pressure jetting unit 300 was driven into the soil between each row of anodes 120 and the adjacent anodes 120. During the driving process, a special driving device was used to keep the horizontal tubes 330 in the soil 500 horizontally. At the same time, integrated sensors 200 were deployed at equal intervals in the horizontal and vertical directions in the soil 500 between the anodes and cathodes at representative locations to ensure comprehensive monitoring of changes in the soil parameters 500 in the reinforced area.

[0036] After the electroosmotic reinforcement is officially started, the control system receives real-time data on moisture content, conductivity, and pH value from the integrated sensor 200, and processes the data according to the formula. i =( a 1- a 2) / L Calculate the parameter gradient between the anode and cathode i Where a1 and a2 are the monitoring parameters of the soil near the anode 120 and cathode 130, respectively, and L is the distance between the anode and cathode. When the parameter gradient increases to 2 / 3 of the limit gradient obtained in the pre-test, the control system determines that the start-up threshold has been reached, automatically starts the high-pressure pump 340, and injects conditioning fluid into the main pipe 310 according to the pressure determined in the pre-test. The conditioning fluid flows sequentially through the bend pipe 320 and the horizontal pipe 330, and is finally sprayed out under high pressure from the jet pipes 331 on each layer of horizontal pipe 330, entering the surrounding soil. Depending on the control target, different media can be selected for the conditioning fluid: a low-concentration sodium carbonate solution is used when pH needs to be controlled, tap water is used when moisture content needs to be controlled, and a low-concentration sodium chloride solution is used when conductivity needs to be controlled.

[0037] During the injection process, the control system continuously monitors changes in the parameter gradient. When the parameter gradient falls back to 1 / 3 to 1 / 2 of the limit gradient, valve 321 is closed to stop the injection. The entire injection process achieves a shift from "blind reinforcement" to "on-demand adjustment," effectively avoiding overtreatment or undertreatment. Electroosmotic reinforcement continues with power. When the parameter gradient reaches the activation threshold again, the above injection adjustment steps are repeated until the moisture content of the soil near cathode 130 is reduced by at least 30% compared to the moisture content of the soil near the cathode in the pre-test, and the drainage rate tends to stabilize. At this point, electroosmotic reinforcement is stopped.

[0038] After reinforcement is completed, the anode 120, cathode 130 and high-pressure injection unit 300 will be pulled out of the soil and recycled, and stored separately for future use, so as to avoid the environmental pollution caused by metal materials remaining underground or causing obstacles to subsequent projects.

[0039] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0040] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An electro-osmotic reinforcement device for controlling soil parameter gradients, characterized in that, include The electroosmosis device (100) includes a DC power supply (110), an array of anodes (120) and cathodes (130), the anodes (120) and cathodes (130) being connected to the positive and negative terminals of the DC power supply (110) respectively, to generate a DC electric field and to cause an electrolytic reaction, so that hydrated cations in the pore water of the soil (500) migrate directionally from the anodes (120) to the cathodes (130); The integrated sensor (200) includes at least a moisture content measurement module, a conductivity testing module and a pH testing module. The integrated sensor (200) is set between the anode (120) and the cathode (130) to monitor the changes in moisture content, conductivity and pH parameters in the soil (500) during the electro-osmotic reinforcement process. And at least one high-pressure injection unit (300), wherein a horizontal tube (330) in the high-pressure injection unit (300) is disposed between any two adjacent anodes (120) for spraying conditioning liquid in the horizontal and vertical directions.

2. The electro-osmotic reinforcement device for controlling soil parameter gradients according to claim 1, characterized in that, The high-pressure injection unit (300) includes a main pipe (310), a bend pipe (320), a horizontal pipe (330), and a high-pressure pump (340); The first end of the main pipe (310) is connected to the high-pressure pump (340), and the second end is connected to the bend pipe (320); The bend (320) connects the main pipe (310) and the horizontal pipe (330); The horizontal tubes (330) are arranged in an array in the soil (500) in a direction perpendicular to the surface of the soil (500), and a bend (320) is provided between any two adjacent horizontal tubes (330).

3. The electro-osmotic reinforcement device for controlling soil parameter gradients according to claim 2, characterized in that, The horizontal tube (330) is arranged symmetrically along the line connecting any two adjacent anodes (120).

4. The electro-osmotic reinforcement device for controlling soil parameter gradients according to claim 2, characterized in that, A jet pipe (331) is provided on the side of the horizontal pipe (330); The jet pipes (331) are arranged in an array along the length of the horizontal pipe (330) and parallel to the surface of the soil (500); The axis of the injection pipe (331) is inclined at 30° to 60° to the axis of the horizontal pipe (330), and the vector directions of the projections of the injection pipes (331) on the axis of the horizontal pipe (330) on both sides of the line connecting two adjacent anodes (120) are opposite.

5. The electro-osmotic reinforcement device for controlling soil parameter gradients according to claim 2, characterized in that... The high-pressure injection unit (300) is equipped with a valve (321) on the bend (320) connected to the main pipe (310) for controlling the on / off state of each injection unit.

6. A method for controlling soil parameter gradients using the device described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Install an anode (120), a cathode (130), a comprehensive sensor (200), and a high-pressure injection unit (300) in the soft soil to be reinforced; S2. Obtain the limiting gradient of soil (500) parameters through preliminary tests and determine the injection pressure of the conditioning fluid; S3. Electroosmotic reinforcement is carried out by energizing, and the soil (500) parameters are monitored in real time and the parameter gradient between the anode and cathode is calculated. S4. When the parameter gradient reaches the preset start threshold, start the high pressure pump (340) and spray the regulating liquid into the surrounding soil (500) through the jet pipe (331) on the horizontal pipe (330) until the parameter gradient falls back to the preset target range and then stop the injection. S5. Repeat steps 3 and 4 until the moisture content of the soil (500) near the cathode reaches the predetermined requirement. S6. Recycle after reinforcement is completed.

7. The electroosmotic reinforcement method according to claim 6, characterized in that, The preliminary test mentioned in step S2 includes: A pair of electrodes were inserted into the soil (500) for electroosmotic reinforcement until the cathode drainage rate decreased to the threshold. The water content, electrical conductivity and pH value of the soil (500) near the anode (120) and cathode (130) were measured at this time, and the parameter gradient was calculated as the limiting gradient.

8. The electroosmotic reinforcement method according to claim 6, characterized in that, The preset start threshold in step S4 is 2 / 3 of the limit gradient, and the preset target range is 1 / 3 to 1 / 2 of the limit gradient.

9. The electroosmotic reinforcement method according to claim 6, characterized in that, In step S4, the conditioning liquid is sprayed into the surrounding soil (500) through the spray pipe (331) on the horizontal pipe (330), and there is a gap between the spray flow line (400) formed by the spray conditioning liquid and the anode (120).

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