Contaminated site soil prevention and treatment equipment and prevention and treatment method thereof

Abstract

The application discloses a kind of contaminated site soil prevention and treatment equipment and its prevention and treatment method, it is related to soil treatment and repair equipment technical field, it includes walking mechanism, deep ditching soil loosening component, ditch targeted medicine delivery component, soil rotary tillage medicine mixing component and surface layer strengthening spray component, by the ordered arrangement and collaborative work of walking mechanism, main truss, deep ditching soil loosening component, ditch targeted medicine delivery component, soil rotary tillage medicine mixing component and surface layer strengthening spray component, realize the full depth in-situ repair of contaminated soil, without soil excavation and transport, deep ditching soil loosening component forms continuous unobstructed deep ditch, ditch targeted medicine delivery component will reagent spread smoothly in deep ditch inside, soil rotary tillage medicine mixing component completes soil forced throwing and reagent mixing, surface layer strengthening spray component forms wide-width atomization spray surface by high-pressure spray pipe, finally with deep layer targeted medicine delivery, middle layer rotary tillage medicine mixing, it is jointly constituted that surface layer strengthening is full-dimension repair closed loop of deep layer penetration, middle layer mixing.

Description

Technical Field

[0001] This invention relates to the field of soil remediation equipment technology, and in particular to equipment and methods for the prevention and control of contaminated site soil. Background Technology

[0002] Soil is a core component of the ecosystem and the material foundation for human survival and development. With the acceleration of industrialization and agricultural intensification, various harmful substances such as heavy metals, organic pollutants, and petroleum hydrocarbons continuously intrude into the soil environment, causing problems such as soil structure damage and fertility decline. These pollutants can also accumulate through the food chain or migrate through groundwater, threatening ecological security and human health. Against this backdrop, soil remediation of contaminated sites has become a top priority in ecological and environmental protection.

[0003] Currently, soil remediation technologies are mainly divided into two major directions: in-situ remediation and ex-situ remediation. Ex-situ remediation requires the excavation and transportation of contaminated soil to a dedicated site for centralized treatment. Although it can achieve precise remediation, it has drawbacks such as large engineering workload, high transportation costs, and strong site disturbance, and is also prone to secondary pollution during transportation. In-situ remediation, on the other hand, involves direct treatment operations at the contaminated site. It has advantages such as minimal site disturbance, low overall cost, and preservation of the original ecological structure of the soil, making it more in line with the development trend of green remediation and the mainstream remediation technology route for moderately and lightly contaminated sites.

[0004] Specifically, existing in-situ remediation equipment primarily uses surface spraying and shallow grouting for pesticide application. This relies entirely on gravity-driven natural infiltration for pesticide diffusion, lacking active soil disturbance and forced mixing mechanisms. When dealing with clayey, saline-alkali, or densely granular soils, the narrow pores and poor connectivity between soil particles make it difficult for pesticides to penetrate the surface layer, limiting their effect to the shallow soil and preventing them from reaching deeper contaminated areas. Even with loose soils, the pesticide distribution under natural infiltration is uneven, with a higher concentration at the top and lower concentration at the bottom, preventing deep contaminants from fully reacting with the pesticide. This problem directly leads to two major drawbacks: first, the risk of residual deep contaminants is high, making it difficult for the remediated soil to meet treatment standards and posing a risk of secondary pollution; second, excessive pesticide application is required to achieve better remediation results, leading to pesticide waste and significantly increasing remediation costs. Furthermore, the lack of active mixing mechanisms limits the contact area between the pesticide and soil particles, resulting in a slow reaction rate, prolonged remediation cycles, and an inability to meet the needs of rapid remediation of contaminated sites.

[0005] Therefore, this invention proposes a soil remediation equipment and method for contaminated sites to solve the above problems. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A soil remediation device for contaminated sites, comprising: The traveling mechanism is equipped with a main truss at its forward end; A deep trenching and loosening component is assembled at the front end of the main truss, and the deep trenching and loosening component has multiple trenching and loosening teeth arranged in a linear manner. The channel-targeted drug delivery component is assembled at the rear end of the deep trenching and loosening component of the main truss along the forward direction. The walking mechanism supports the front end of the main truss. The trenching and loosening teeth of the deep trenching and loosening component are inserted into the soil under the action of gravity and inclination to form a rear support point, so that the main truss as a whole is in a forward tilting posture. The channel-targeted drug delivery component has multiple drug diversion and delivery pipes corresponding to the trenching and loosening teeth. The soil rotary tillage and pesticide mixing component is assembled at the rear end of the trench targeted pesticide delivery component of the main truss along the forward direction. The soil rotary tillage and pesticide mixing component has a rotary tillage and soil disturbance unit. The rotary tillage and soil disturbance unit rotates at high speed to turn over and stir the pesticide in the deep trench with the surrounding loose soil, breaking the soil aggregate structure. The surface reinforcement spraying assembly is assembled at the tail end of the main truss. The surface reinforcement spraying assembly is used to spray atomized agents onto the soil surface after rotary tillage and leveling.

[0007] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the deep trenching and loosening soil components are in multiple sets, and the multiple sets of deep trenching and loosening soil components are assembled at the front end of the main truss along the width direction of the main truss. The deep trenching and loosening soil components also include an upper loosening support, a lower loosening support, and a buffer adjustment rod. The upper loosening support is assembled on the main truss, and two sets of vibration generators are symmetrically arranged on the upper loosening support. The two ends of the buffer adjustment rod are bolted to the upper loosening support and the lower loosening support. Each set of deep trenching and loosening components has multiple trenching and loosening teeth arranged linearly on the lower loosening support. The trenching and loosening teeth have a triangular prism rigid structure, with the tooth body gradually narrowing from the root to the top. The tooth tip is designed with an acute angle, and the middle of the tooth body convexes symmetrically to both sides to form an arc-shaped guide surface.

[0008] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the buffer adjustment rod includes a connecting end bolted to the upper and lower soil loosening supports, a spiral cylinder connected to one side of the connecting end, and a spring seat threaded onto the spiral cylinder. A guide rod extends from the connecting end on the other side. The guide rod is inserted into the spiral cylinder and is slidably connected to the spiral cylinder. A telescopic spring is sleeved on the surface of the guide rod. One end of the telescopic spring is connected to the connecting end, and the other end is connected to the surface of the spring seat.

[0009] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the targeted drug delivery component in the trench further includes a drug control box, which is fixedly mounted on the truss platform of the main truss. A drug inlet is provided at the top of the control box. The number and position of the drug diversion and delivery pipes correspond one-to-one with the trenching and loosening teeth of the deep trenching and loosening component. The inner cavity of the pipe is connected to the liquid outlet of the drug control box. The bottom end of the drug diversion and delivery pipe is bent away from the deep trenching and loosening component, and the opening of the bent end is provided with a conical opening groove, so that the opening end of the drug diversion and delivery pipe forms a receiving slope with a drug discharge function. Multiple drug delivery trenches extending along the drug discharge direction are opened on the receiving slope.

[0010] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the soil rotary tillage and pesticide mixing component includes a connector assembled below the main truss, a connecting bracket hinged to the lower end of the connector, and two sets of L-shaped connecting plates symmetrically assembled on both sides of the connecting bracket. The two sets of L-shaped connecting plates are used to install the rotary tillage and soil disturbance unit. The rotary tillage and soil disturbance unit includes a rotary motor fixed to an L-shaped connecting plate, a mounting disk assembled at the output end of the rotary motor, multiple roller mounting plates arranged at equal intervals around the circumference on the mounting disk, and multiple rotary tillage rollers rotatably mounted on the roller mounting plates.

[0011] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the connecting member includes a telescopic rod, a rod spring, and a lifting hinge seat. The upper end of the telescopic rod is rigidly connected to the main truss, and the lower end is rigidly connected to the lifting hinge seat. The upper surface of the connecting bracket is provided with a protrusion that extends into the lifting hinge seat and is rotatably connected to the lifting hinge seat, so that the connecting bracket can deflect left and right at the hinge point of the lifting hinge seat. The boom spring is sleeved on the outside of the telescopic boom, with its two ends abutting against the lower end face of the hoisting hinge and the main truss, respectively.

[0012] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the surface reinforcement spraying assembly includes an assembly base, a connecting main seat, and a high-pressure spray pipe. The assembly base is fixedly installed at the tail of the main truss, with its upper end rigidly connected to the main body of the truss and its lower end tightly assembled with the connecting main seat. The connecting main seat has a flow guiding cavity inside and a liquid collection port at its top. Multiple high-pressure hoses that connect to the high-pressure spray pipe extend from the connecting main seat from the flow guiding cavity.

[0013] As a preferred embodiment of the soil remediation equipment for contaminated sites of the present invention, the surface-enhanced spraying assembly further includes a piping mounting frame, which is fixedly installed at the bottom of the connecting base and extends outward in a radial pattern. Multiple high-pressure spray pipes are evenly installed at the ends of the piping mounting frame, with the liquid outlet of the high-pressure spray pipes facing the soil surface.

[0014] A method for remediating contaminated soil at a site includes the following steps: S1. The walking mechanism supports the front end of the main truss. The ditching and loosening teeth of the deep ditching and loosening component are inserted into the soil under the action of gravity and inclination to form a rear support point, so that the main truss as a whole is in a forward tilting posture, and the ditching and loosening teeth of the deep ditching and loosening component at the front end of the main truss are inserted into the soil to a predetermined depth under the action of gravity and inclination. S2. The walking mechanism moves forward, and the deep trenching and loosening component moves forward synchronously with the main truss. Under the vibration excitation of the vibration generator and the adaptive buffer support of the buffer adjustment rod, the trenching and loosening teeth continuously cut and break the soil, forming a continuous and unobstructed deep trench on the surface of the contaminated site, while guiding and throwing the turned-out soil to both sides of the trench. S3. The main control box of the agent receives and distributes the remediation agent. The agent diversion and delivery pipe delivers the agent in a direction to the deep trench corresponding to the trenching and loosening teeth. The agent is smoothly spread along the guide trench on the inclined surface of the bent end of the agent diversion and delivery pipe to the bottom of the deep trench, so that the agent can fully contact the deep contaminated soil. S4. The soil rotary tillage and pesticide mixing component moves forward with the main truss. The rotary motor drives the mounting disc to rotate the rotary tillage drum at high speed, forcibly turning and stirring the soil and pesticide in the deep trench where targeted pesticide delivery has been completed. The rotary tillage drum fully mixes the pesticide in the deep trench with the surrounding loose soil, breaks up the soil aggregate structure, fills the deep trench, smooths the surface, and forms a soil mixture layer with pesticide evenly distributed. S5. The surface reinforcement spraying assembly sprays the agent in an atomized form onto the soil surface after rotary tillage and leveling through a high-pressure spray pipe, forming an atomized spraying surface that covers the working area and replenishes the agent to the surface soil.

[0015] As a preferred embodiment of the soil remediation method for contaminated sites of the present invention, when the trenching and loosening tooth encounters a soil obstacle, the telescopic spring of the buffer adjustment rod is compressed, the guide rod slides along the spiral cylinder to absorb the impact load, so that the trenching and loosening tooth adaptively bypasses the obstacle, and automatically resets after passing the obstacle by the rebound force of the telescopic spring, maintaining a stable soil penetration depth.

[0016] The beneficial effects of this invention are as follows: Through the orderly arrangement and coordinated operation of the walking mechanism, main truss, deep trenching and loosening component, trench-targeted drug delivery component, soil rotary tillage and drug mixing component, and surface reinforcement spraying component, full-depth in-situ remediation of contaminated soil is achieved without the need for soil excavation and transportation, reducing site disturbance and the risk of secondary pollution; the deep trenching and loosening component, relying on the cooperation of trenching and loosening teeth, vibration generator, and buffer adjustment rod, is suitable for various common soil types, absorbs operational impact and avoids structural damage, while forming continuous and unobstructed deep trenches; the trench-targeted drug delivery component, through drug diversion and delivery pipes corresponding one-to-one with the trenching and loosening teeth, evenly distributes the drug... The equipment is steadily spread within deep trenches, achieving precise and efficient contact between the pesticide and deep soil. The soil rotary tillage and pesticide mixing component forces the soil to turn over and mix with the pesticide, smoothing the surface and ensuring uniform mixing. The surface reinforcement spraying component forms a wide atomized spray surface through high-pressure nozzles to replenish the pesticide on the surface soil after rotary tillage. Ultimately, together with deep targeted pesticide delivery and mid-layer rotary tillage and pesticide mixing, it forms a comprehensive remediation closed loop of deep penetration, mid-layer mixing, and surface reinforcement. The overall equipment operates smoothly, is highly adaptable, and has a high pesticide utilization rate. It can effectively improve the uniformity, integrity, and operational efficiency of contaminated soil remediation, and has excellent structural stability and engineering application value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the equipment and methods for soil remediation at contaminated sites; Figure 2 Structural isometric drawing of equipment and methods for soil remediation of contaminated sites; Figure 3 This is a schematic diagram of the main truss structure in the figure of the present invention; Figure 4 This is a schematic diagram of the soil rotary tillage and pesticide mixing component in this invention; Figure 5 For the present invention Figure 4 Enlarged view of the A-section structure; Figure 6 This is a schematic diagram of the surface reinforcement spray assembly in this invention; Figure 7 This is a schematic diagram of the deep trenching and soil loosening component in this invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure of section B; Figure 9 This is a schematic diagram of the channel-targeted drug delivery component in this invention; Figure 10 For the present invention Figure 9 Enlarged view of the C-section structure.

[0019] Explanation of reference numerals in the attached drawings: 100, Walking mechanism; 110, Trolley frame; 120, Vertical bearing seat; 130, Wheel axle; 140, Wheel hub; 150, Handrail; 200, Main truss; 210, Front truss; 220, Rear truss; 230, Truss platform; 240, Front crossbeam; 250, Horizontal crossbeam; 300, Surface reinforcement spraying assembly; 310, Assembly base; 320, Connecting main seat; 321, Liquid collection port; 330, Piping mounting bracket; 340, High-pressure spray pipe; 400, Soil rotary tillage and pesticide mixing assembly; 410, Connector; 411, Telescopic boom; 412, Boom spring; 413, Lifting hinge; 420, Connection. Support frame; 430, L-shaped connecting plate; 440, rotary motor; 450, mounting disc; 460, roller mounting plate; 470, rotary tillage roller; 500, trench targeted drug delivery assembly; 510, main control box for pesticides; 511, pesticide inlet; 520, pesticide diversion and delivery pipe; 521, conical opening groove; 522, pesticide delivery trench; 600, deep trenching and loosening assembly; 610, upper loosening support; 620, lower loosening support; 630, vibration generator; 640, buffer adjustment rod; 641, connecting end; 642, spiral rod cylinder; 643, spring seat; 644, telescopic spring; 645, guide rod; 650, trenching and loosening teeth. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] Reference Figures 1-10 As shown, this embodiment provides equipment for the remediation of contaminated site soil, including: The traveling mechanism 100 is equipped with a main truss 200 at its forward end. The deep trenching and loosening component 600 is assembled at the front end of the main truss 200. The deep trenching and loosening component 600 has multiple trenching and loosening teeth 650 arranged in a linear manner. The trench-targeted drug delivery component 500 is assembled at the rear end of the deep trenching and loosening component 600 of the main truss 200 along the forward direction. The walking mechanism 100 supports the front end of the main truss 200. The trenching and loosening teeth 650 of the deep trenching and loosening component 600 are inserted into the soil under the action of gravity and inclination to form a rear support point, so that the main truss 200 is in a forward tilting posture. The deep trenching and loosening component 600 and the walking mechanism 100 move forward together to form a continuous deep trench on the soil surface. The trench-targeted drug delivery component 500 has multiple drug diversion and guiding pipes 520 corresponding to the trenching and loosening teeth 650. The drug diversion and guiding pipes 520 deliver the drug in a directional manner into the deep trench to achieve precise contact between the drug and the deep soil. The soil rotary tillage and pesticide mixing component 400 is assembled at the rear end of the trench targeted pesticide delivery component 500 of the main truss 200 along the forward direction. The soil rotary tillage and pesticide mixing component 400 has a rotary tillage and soil disturbance unit. The rotary tillage and soil disturbance unit rotates at high speed to forcibly turn over and mix the pesticide in the deep trench with the surrounding loose soil, break the soil aggregate structure, eliminate the distribution difference of pesticide concentration at the top and concentration at the bottom, and at the same time smooth out the uneven surface after trenching to form a uniform soil mixing layer. The surface reinforcement spraying component 300 is assembled at the tail end of the main truss 200. The surface reinforcement spraying component 300 is used to spray atomized agents onto the soil surface after rotary tillage and leveling, replenishing the agent content in the surface soil, forming a multi-dimensional remediation system of deep penetration, middle layer mixing and surface reinforcement, and improving the overall soil remediation effect.

[0024] Reference Figure 1 and Figure 2 As shown, the walking mechanism 100 includes a trolley frame 110, wheel axles 130, wheel hubs 140, and handrails 150. The trolley frame 110 has a horizontal rectangular frame structure, and its front end is rigidly connected to the main truss 200. Two sets of vertical bearing seats 120 are symmetrically fixed at the bottom of the trolley frame 110. The two ends of the wheel axles 130 are rotatably assembled in the vertical bearing seats 120 through bearings, and the parts of the wheel axles 130 that extend out of the vertical bearing seats 120 are interference-fitted with the wheel hubs 140. One end of the handrail 150 is welded to the end of the trolley frame 110 away from the main truss 200, and the surface of the handrail 150 is covered with an anti-slip rubber sleeve.

[0025] Reference Figure 1 , Figure 2 as well as Figure 3As shown, the main truss 200 includes a front truss 210, a rear truss 220, a truss platform 230, a front crossbeam 240, and a horizontal crossbeam 250. A soil rotary tillage and pesticide mixing component 400 is sandwiched between the front truss 210 and the rear truss 220 and is rigidly connected to the soil rotary tillage and pesticide mixing component 400. The top of the front truss 210 is welded and fixed to the truss platform 230 to form a support platform for supporting the pesticide storage and distribution supply device.

[0026] There are multiple sets of front crossbeams 240, which are arranged linearly at the front end of the front truss 210. Each front crossbeam 240 corresponds to a set of deep trenching and loosening soil components 600. Horizontal crossbeams 250 are arranged perpendicular to the length of the front truss 210 to serve as supports for assembling the soil rotary tillage and pesticide mixing components 400.

[0027] Specifically, along the forward direction of the walking mechanism 100, a deep ditching and loosening soil component 600, a ditch-targeted pesticide delivery component 500, a soil rotary tillage and pesticide mixing component 400, and a surface-enhancing spraying component 300 are sequentially arranged on its main truss 200. The deep ditching and loosening soil component 600, the ditch-targeted pesticide delivery component 500, the soil rotary tillage and pesticide mixing component 400, and the surface-enhancing spraying component 300 work together to first break up the deep soil through the ditching and loosening teeth 650 of the deep ditching and loosening soil component 600. The system features a dense structure that creates interconnected deep channels. The targeted drug delivery component 500 then delivers the drug to these deep channels via its drug diversion and delivery pipe 520, ensuring targeted contact between the drug and deep-seated contaminants. Subsequently, the rotary tillage and mixing component 400 forces the drug to disperse evenly in the middle layer of the soil, breaking down concentration stratification caused by gravity infiltration. Finally, the surface-level enhanced spray component 300 replenishes the surface-level drug through atomized spraying, forming a closed-loop remediation system covering all depths from deep to medium to shallow. The entire system requires no soil excavation or transport, operating entirely in situ, reducing site disturbance and the risk of secondary contamination. Through the synergistic design of mechanical disturbance and drug delivery, it improves drug utilization and remediation efficiency, adapting to the remediation needs of moderately to lightly contaminated sites with varying textures, including sticky and loose soils.

[0028] Reference Figure 7 and Figure 8 As shown, there are multiple sets of deep trenching and loosening soil components 600. These multiple sets of deep trenching and loosening soil components 600 are assembled at the front end of the main truss 200 along the width direction of the main truss 200. The deep trenching and loosening soil components 600 also include an upper loosening support 610, a lower loosening support 620, and a buffer adjustment rod 640. The upper loosening support 610 is assembled on the front truss 210 of the main truss 200. Two sets of vibration generators 630 are also symmetrically arranged on the upper loosening support 610. The two ends of the buffer adjustment rod 640 are bolted to the upper loosening support 610 and the lower loosening support 620. Each set of deep trenching and loosening components 600 has multiple trenching and loosening teeth 650 arranged linearly on the lower loosening support 620. The trenching and loosening teeth 650 have a rigid triangular prism structure. The tooth body gradually narrows from the root to the tip, forming a sharp cutting end. The tooth tip is designed with an acute angle, and the cutting edges on both sides are reinforced to facilitate cutting into dense soil or breaking up clumps of soil. The middle of the tooth body convexes symmetrically to both sides, forming an arc-shaped guide surface, which can smoothly turn the soil to both sides of the trench during the trenching process, avoiding soil backflow and clogging of the deep trench.

[0029] In one embodiment, the upper soil loosening support 610 and the lower soil loosening support 620 are arranged in a U-shaped plate structure. The buffer adjustment rod 640 includes a connecting end 641 bolted to the upper soil loosening support 610 and the lower soil loosening support 620, a spiral cylinder 642 connected to the connecting end 641 on one side, and a spring seat 643 threaded to the spiral cylinder 642. A guide rod 645 extends from the connecting end 641 on the other side. The guide rod 645 is inserted into the spiral cylinder 642 and is slidably connected to the spiral cylinder 642. A telescopic spring 644 is sleeved on the surface of the guide rod 645. One end of the telescopic spring 644 is connected to the connecting end 641, and the other end is connected to the surface of the spring seat 643.

[0030] During operation, the telescopic nature of the buffer adjustment rod 640 provides adaptive buffering and depth adjustment functions for the deep trenching and loosening component 600, adapting to the trenching needs of different soil textures. The buffer adjustment rod 640 achieves relative displacement compensation between the upper and lower loosening supports 620 through the sliding engagement of the guide rod 645 and the spiral cylinder 642. When the trenching and loosening teeth 650 encounter obstacles such as soil protrusions or stones, the guide rod 645 slides along the spiral cylinder 642, and the telescopic spring 644 is compressed and contracts to absorb the impact load, preventing damage to the trenching and loosening teeth 650 or the support due to rigid collisions. The threaded connection design between the spring seat 643 and the spiral cylinder 642 allows the preload of the telescopic spring 644 to be adjusted by rotating the spring seat 643, thereby adapting to the trenching resistance of soils with different hardness and ensuring the stable penetration depth of the trenching and loosening teeth 650. In addition, the deep trenching and loosening component 600, together with the vibration force of the vibration generator 630, through the synergistic effect of elastic buffering and rigid support, ensures that the trenching and loosening teeth 650 maintain effective contact with the soil during the vibration process, thereby improving the soil loosening and breaking effect.

[0031] Reference Figure 9 and Figure 10As shown, the channel-targeted drug delivery assembly 500 also includes a drug control box 510, which is mounted on the main truss 200. The top of the drug control box 510 is provided with a drug inlet 511, which is connected to a drug storage and diversion supply device for receiving the repair drug to be delivered. The number and position of the drug diversion and delivery pipes 520 correspond to the trenching and loosening teeth 650. Their inner cavities are connected to the drug control box 510. The bottom end of the drug diversion and delivery pipe 520 is bent away from the deep trenching and loosening assembly 600, and the curved end of the drug diversion and delivery pipe 520 has a conical opening groove 521 so that the liquid guiding end of the drug diversion and delivery pipe 520 forms a liquid receiving slope. Multiple drug guiding grooves 522 are opened on the receiving slope.

[0032] Reference Figure 9 and Figure 10 As shown, the channel-targeted drug delivery component 500 also includes a drug control box 510, which is fixedly mounted on the truss platform 230 of the main truss 200. A drug inlet 511 is provided on its top. The drug inlet 511 is sealed and connected to the drug storage and diversion supply device to stably receive the repair drug to be delivered. The number and position of the drug diversion and delivery pipes 520 correspond one-to-one with the trenching and loosening teeth 650 of the deep trenching and loosening component 600. Their inner cavities are connected to the liquid outlet of the drug control box 510 to achieve precise drug diversion. The bottom end of the agent diversion and delivery pipe 520 is bent away from the deep trenching and loosening component 600, and the opening of the bent end is provided with a conical opening groove 521, so that the opening end of the agent diversion and delivery pipe 520 forms a receiving slope with the function of discharging the agent; multiple guiding grooves 522 extending along the direction of discharging the agent are opened on the receiving slope, ensuring that the agent flows in a directional manner along the guiding grooves 522 and is introduced into the deep trench, thereby improving the contact efficiency between the agent and the deep soil.

[0033] The side of the pesticide diversion and delivery pipe 520 facing the soil is designed with a smooth and thin structure to reduce frictional resistance with the soil and prevent soil adhesion and accumulation. The outlet of the pesticide diversion and delivery pipe 520 is hidden inside the pipe and is set away from the direction of travel of the control equipment to avoid direct impact or blockage of the outlet by soil and debris during the movement.

[0034] It should be noted that, under actual working conditions, due to the continuous cutting operation of the trenching and loosening teeth 650, a continuous deep trench with a regular cross section is formed. Under the combined action of capillary guidance and gravity in the drug delivery trench 522, the agent is rapidly spread along the slope of the trench bottom and completes the initial wetting and physical adsorption of the loose soil pores at the bottom of the deep trench within a few seconds. This settling process arrives before the disturbance of the rotary tillage roller 470. At the same time, the rotary tillage roller 470 of the soil rotary tillage mixing component 400 adopts a forward rotary tillage mode that matches the direction of travel. Its cutting rotation direction throws the soil on both sides and bottom of the trench forward and upward, and then forcibly turns it over and backfills it into the deep trench. Its main disturbance area is concentrated on the soil layer on which the agent has been spread. The backfilled soil naturally covers the trench bottom that has been soaked in the agent under the action of gravity, sealing the agent between the middle and lower soil particles, forming a mixed and wrapped structure with the agent at the bottom and the soil overturned on the top.

[0035] Therefore, while meeting the anti-clogging requirements, the opposite outlet effectively avoids splashing and loss of the agent at the bottom of the trench by utilizing the time difference between gravity settling and forward backfilling. This ensures that the agent is not only not lifted up by rotary tillage, but is also kneaded into the soil aggregates from the outside to the inside during the forced mixing process, achieving a smooth transition from deep infiltration to uniform mixing in the middle layer.

[0036] Meanwhile, the tail end of the drug delivery trench 522 of the drug diversion and delivery pipe 520 is designed with an flared opening. Combined with the hidden liquid outlet structure inside the drug diversion and delivery pipe 520 facing away from the direction of travel, the discharged drug can be evenly spread along the opening end, fully covering the bottom of the continuous deep trench, realizing the flat distribution of the drug in the deep trench, and improving the contact range and uniformity between the drug and the deep soil.

[0037] Reference Figure 4 and Figure 5 As shown, the soil rotary tillage and pesticide mixing assembly 400 includes a connector 410 mounted below the horizontal beam 250 of the main truss 200, a connecting bracket 420 hinged to the lower end of the connector 410, and two sets of L-shaped connecting plates 430 symmetrically mounted on both sides of the connecting bracket 420. The two sets of L-shaped connecting plates 430 are used to install the rotary tillage and soil disturbing unit. The rotary tillage and soil-disturbing unit includes a rotary motor 440 fixed on an L-shaped connecting plate 430, a mounting disk 450 mounted on the output end of the rotary motor 440, multiple roller mounting plates 460 arranged circumferentially at equal intervals on the mounting disk 450, and multiple rotary tillage rollers 470 rotatably mounted on the roller mounting plates 460. When the rotary motor 440 drives the mounting disk 450 to rotate the rotary tillage rollers 470 at high speed, the rotary tillage rollers 470 adopt a forward rotary tillage mode that matches the direction of travel. The soil on both sides and bottom of the trench is cut forward and upward and then turned over and backfilled into the deep trench. Multiple sets of rotary tillage rollers 470 can simultaneously rotate, disturb and turn over the soil after trenching and application of pesticides. This not only fully mixes the pesticide in the deep trench with the surrounding soil, but also smooths out the uneven surface through the rolling of the rotary tillage rollers 470. At the same time, the rotary tillage rollers 470 form a wide working surface as the installation disc 450 rotates circumferentially, which greatly improves the efficiency of mixing pesticides and leveling, and ensures the uniformity of the soil and pesticide mixture layer and the flatness of the ground surface.

[0038] Furthermore, the connector 410 includes a telescopic boom 411, a boom spring 412, and a lifting hinge 413. The upper end of the telescopic boom 411 is rigidly connected to the horizontal beam 250 of the main truss 200, and the lower end is rigidly connected to the lifting hinge 413, so that the lifting hinge 413 can move up and down with the telescopic boom 411 under the action of external force. The upper surface of the connecting bracket 420 is provided with a protrusion that extends into the lifting hinge 413 and is rotatably connected to the lifting hinge 413, so that the connecting bracket 420 can deflect left and right at the hinge point of the lifting hinge 413. The boom spring 412 is sleeved on the outside of the telescopic boom 411, with its two ends abutting against the lower end face of the hoisting hinge seat 413 and the horizontal beam 250 of the main truss 200, respectively.

[0039] The connector 410 enables the soil rotary tillage and pesticide mixing assembly 400 to achieve both vertical adaptive floating and lateral deflection adjustment during operation. The telescopic boom 411, in conjunction with the elastic support of the boom spring 412, can compensate for vertical expansion and contraction according to the undulations of the soil surface, ensuring that the rotary tillage and soil disturbance unit always remains in contact with the soil surface, buffering the vibration and impact generated during operation, avoiding structural damage caused by hard contact, and ensuring stable rotary tillage depth and pesticide mixing uniformity. The rotational engagement between the connecting bracket 420 and the lifting hinge 413 allows the rotary tillage and soil disturbance unit to autonomously deflect left and right according to changes in terrain and soil resistance, avoiding lateral stress caused by obstacles such as local hard soil and rocks, improving the equipment's passability and operational smoothness in complex terrain, and ensuring continuous and stable pesticide mixing, leveling, and soil disturbance operations.

[0040] Reference Figure 6As shown, the surface reinforcement spray assembly 300 includes an assembly base 310, a connecting main seat 320, and a high-pressure spray pipe 340. The assembly base 310 is fixedly installed at the tail of the main truss 200, with its upper end rigidly connected to the main body of the truss and its lower end fastened to the connecting main seat 320. The connecting main seat 320 has a flow guide cavity inside and a liquid collection port 321 at its top. The liquid collection port 321 of the connecting main seat 320 is sealed and connected to the agent storage and distribution supply device for receiving and distributing the pressurized repair agent. Multiple high-pressure hoses extend from the connecting main seat 320 into the high-pressure spray pipe 340.

[0041] The surface reinforcement spraying assembly 300 also includes a piping mounting bracket 330, which is fixedly installed at the bottom of the connector 320 and extends outward in a radial pattern. Multiple high-pressure spray pipes 340 are evenly installed at the ends of the piping mounting bracket 330, with the liquid outlet of the high-pressure spray pipes 340 facing the soil surface.

[0042] The high-pressure nozzles 340 are arranged in layers and staggered along the radial direction of the piping mounting frame 330 to form a spray surface covering the entire working width. After the agent is diverted through the main connector 320, it enters each high-pressure nozzle 340 and is sprayed evenly in atomized form onto the soil surface after rotary tillage and leveling, so as to replenish and strengthen the surface soil with the agent.

[0043] During operation, the walking mechanism 100 supports the front end of the main truss 200. The trenching and loosening teeth 650 of the deep trenching and loosening component 600 are inserted into the soil under the action of gravity and inclination, forming a rear support point. This causes the main truss 200 to tilt forward as a whole, allowing the trenching and loosening teeth 650 of the deep trenching and loosening component 600 located at the front end to be inserted into the soil. With the adaptive buffering and telescopic adjustment of the vibration generator 630 and the buffer adjustment rod 640, the dense structure of the soil is broken up and a continuous and regular deep trench is formed. At the same time, the guide rod 645, telescopic spring 644 and spring seat 643 in the buffer adjustment rod 640 work together to absorb the impact of the operation, ensuring that the trenching and loosening teeth 650 are stably inserted into the soil.

[0044] Following closely behind, the targeted drug delivery component 500 receives the repair agent delivered by the drug storage and distribution supply device through the main drug control box 510. The agent is then directed and guided through the drug distribution and delivery pipes 520, which correspond one-to-one with the trenching and loosening teeth 650, and smoothly spread the agent into the deep trench. Subsequently, the soil rotary tillage and drug mixing component 400, driven by the rotary motor 440, drives the mounting disc 450, the roller mounting plate 460, and the rotary tillage roller 470 to rotate at high speed, forcibly turning and mixing the soil after drug delivery, breaking up the soil aggregate structure and eliminating the stratification of the drug distribution. At the same time, the telescopic rod 411, the rod spring 412, and the lifting hinge 413 in the connector 410 cooperate to achieve vertical floating and lateral deflection, so that the rotary tillage roller 470 adapts to the terrain undulations, ensuring uniform drug mixing and smoothing the surface.

[0045] Finally, the surface reinforcement spraying component 300 located at the tail end of the main truss 200 sprays the agent evenly on the surface of the rotary tilled soil in the form of atomization through the high-pressure spray pipe 340, replenishing the agent content on the surface. Together with the deep trenching and drug delivery, and the mid-layer rotary tillage and drug mixing, it forms a full-dimensional in-situ remediation system with deep penetration, mid-layer mixing, and surface reinforcement. The entire process does not require excavation and transportation of soil, which reduces site disturbance and greatly improves the utilization rate of the agent and the overall efficiency and uniformity of soil remediation.

[0046] The following describes in detail the soil remediation method for contaminated sites provided by this invention, taking into account the specific structure of the above-mentioned equipment for soil remediation of contaminated sites: In the specific implementation of remediation operations, step S1 is first executed. The operator pushes the walking mechanism 100 through the handrail 150 or connects the trolley frame 110 through the traction device, so that the walking mechanism 100 drives the main truss 200 to the contaminated site to be remediated. The main truss 200 maintains a forward tilted posture under the joint support of the walking mechanism 100 and the channel targeted drug delivery component 500, so that the trenching and loosening teeth 650 of the deep trenching and loosening component 600 located at the front end of the main truss 200 automatically insert into the soil to a predetermined depth under the combined action of gravity and the tilted posture of the main truss 200. The operator can adjust the connection angle between the walking mechanism 100 and the main truss 200 or replace the trenching and loosening teeth 650 of different sizes according to the contamination depth and soil texture of the site to be remediated, and preset the trenching depth to meet the remediation needs of soil with different contamination depths.

[0047] Subsequently, step S2 is executed, and the traveling mechanism 100 continues to move forward. The deep trenching and loosening component 600 moves synchronously with the main truss 200. During this process, the trenching and loosening teeth 650, under the high-frequency vibration excitation of the vibration generator 630, generate a continuous impact and breaking effect on the soil. At the same time, the buffer adjustment rod 640 provides adaptive buffer support for the trenching and loosening teeth 650. Specifically, when the trenching and loosening teeth 650 encounter obstacles such as stones and hard soil clumps in the soil, the lower loosening support 620 is subjected to... The reverse impact force is transmitted to the guide rod 645 through the connecting end 641. The guide rod 645 slides inward along the spiral cylinder 642, and the telescopic spring 644 is compressed, thereby effectively absorbing the instantaneous impact load and preventing damage to the trenching and loosening teeth 650 or the support structure due to rigid collision. After the trenching and loosening teeth 650 crosses the obstacle, the telescopic spring 644 releases its elastic potential energy, pushing the guide rod 645 to reset, so that the trenching and loosening teeth 650 automatically return to the preset soil penetration depth, ensuring the continuous stability of the trenching depth. Multiple trenching and loosening teeth 650 with triangular prism structures continuously cut and break the soil during the forward movement. The arc-shaped guide surface in the middle of the tooth body smoothly guides and throws the turned-out soil to both sides of the trench, preventing the soil from flowing back into the newly formed deep trench, thereby forming a continuous, unobstructed, and regularly shaped deep trench on the surface of the contaminated site.

[0048] In step S3, the main control box 510 receives the repair agent from the agent storage and distribution supply device through its top agent inlet 511. After being temporarily stored and evenly distributed within the main control box 510, the agent enters each agent distribution pipe 520. Since the number and position of the agent distribution pipes 520 correspond one-to-one with the trenching and loosening teeth 650, the curved end of each agent distribution pipe 520 is accurately aligned with the corresponding deep trench. The agent flows downward along the inner cavity of the agent distribution pipe 520, and after reaching the curved end... Guided by the receiving slope formed by the conical opening groove 521, the agent is evenly and smoothly spread to the bottom of the deep trench through multiple drug-guiding trenches 522 extending along the direction of drug discharge. The flared design at the end of the drug-guiding trenches 522 further promotes the uniform distribution of the agent at the bottom of the deep trench, avoiding the accumulation of the agent in one place. During this process, the outlet of the agent diversion and delivery pipe 520 is hidden inside the pipe and set in the opposite direction of travel, which effectively prevents soil or debris from directly impacting and blocking the outlet during the forward movement, ensuring the continuous and smooth delivery of the agent.

[0049] In step S4, the soil rotary tillage and pesticide mixing component 400 continues to advance with the main truss 200, located behind the deep trench where targeted pesticide delivery has been completed. The rotary motor 440 starts and drives the mounting disc 450 to rotate at high speed. Multiple roller mounting plates 460 mounted on the mounting disc 450 and rotary tillage rollers 470 mounted on the roller mounting plates 460 rotate synchronously. The high-speed rotating rotary tillage rollers 470 forcibly turn over and vigorously stir the deep trench and the surrounding soil where the pesticide delivery has been completed, fully mixing the pesticide at the bottom of the deep trench with the surrounding loose soil, effectively breaking the soil aggregate structure, and eliminating the concentration gradient difference of the pesticide in the soil profile. At the same time, the rotary tillage rollers 470 gradually fill the trench formed by the trench during the rotation process and smooth the soil surface after turning over, forming a soil mixture layer with uniform pesticide distribution and a flat surface. During this process, the telescopic rod 411 in the connector 410, in conjunction with the elastic support of the rod spring 412, enables the rotary tillage and soil disturbance unit to vertically adapt to the undulations of the soil surface, keeping the rotary tillage roller 470 in constant contact with the soil surface; the rotational engagement between the connecting bracket 420 and the lifting hinge seat 413 allows the rotary tillage and soil disturbance unit to autonomously deflect left and right according to changes in terrain and soil resistance, effectively avoiding lateral stress caused by obstacles such as local hard soil and stones, and ensuring continuous and stable mixing and leveling operations.

[0050] In step S5, after the soil rotary tillage and mixing component 400 completes the mixing and leveling, the surface reinforcement spraying component 300, located at the tail end of the main truss 200, replenishes the treated soil surface with chemicals. Specifically, the pressurized remediation agent enters the guiding chamber through the liquid collection port 321 at the top of the connector 320, and after being diverted, is delivered to each high-pressure nozzle 340 through multiple high-pressure hoses. Since the high-pressure nozzles 340 are evenly installed at the ends of the radially extending piping mounting frame 330, and are arranged in a layered and staggered manner along the radial direction of the piping mounting frame 330, each high-pressure nozzle 340 works in concert to form a wide atomized spray surface covering the entire working width above the rotary tilled and leveled soil surface. The atomized agent is evenly sprayed onto the soil surface, replenishing and penetrating the surface soil to form a surface protection layer.

[0051] Through the close coordination of steps S1 to S5 in time and space, deep trenching and targeted drug delivery are carried out simultaneously to avoid trench collapse. Rotary tillage and drug mixing follow closely to ensure timely mixing of the agents. Surface spraying completes the surface replenishment. The entire method forms a full-depth agent deployment system that achieves targeted penetration into the deep layer, forced mixing into the middle layer, and atomized replenishment into the surface layer. The entire operation does not require soil excavation and transportation. While minimizing site disturbance, it achieves full-depth in-situ remediation of contaminated soil, effectively improving remediation efficiency, agent utilization rate, and consistency of remediation quality.

[0052] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A soil remediation equipment for contaminated sites, characterized in that, include: The traveling mechanism (100) has a main truss (200) mounted at its forward end. A deep trenching and loosening component (600) is assembled at the front end of the main truss (200), the deep trenching and loosening component (600) having a plurality of trenching and loosening teeth (650) arranged in a linear fashion. The channel-targeted drug delivery assembly (500) is assembled at the rear end of the deep trenching and loosening assembly (600) of the main truss (200) along the forward direction. The walking mechanism (100) supports the front end of the main truss (200). The trenching and loosening teeth (650) of the deep trenching and loosening assembly (600) are inserted into the soil under the action of gravity and inclination to form a rear support point, so that the main truss (200) is in a forward tilting posture. The channel-targeted drug delivery assembly (500) has multiple drug diversion and delivery pipes (520) corresponding to the trenching and loosening teeth (650). The soil rotary tillage mixing component (400) is assembled at the rear end of the trench targeted delivery component (500) of the main truss (200) along the forward direction. The soil rotary tillage mixing component (400) has a rotary tillage and soil disturbance unit. The rotary tillage and soil disturbance unit rotates at high speed to turn over and stir the agent in the deep trench with the surrounding loose soil, breaking the soil aggregate structure. A surface reinforcement spraying assembly (300) is assembled at the tail end of the main truss (200) and is used to spray atomized agents onto the soil surface after rotary tillage and leveling.

2. The soil remediation equipment for contaminated sites as described in claim 1, characterized in that: The deep trenching and loosening soil assembly (600) consists of multiple sets. The multiple sets of deep trenching and loosening soil assembly (600) are assembled at the front end of the main truss (200) along the width direction of the main truss (200). The deep trenching and loosening soil assembly (600) also includes an upper loosening support (610), a lower loosening support (620), and a buffer adjustment rod (640). The upper loosening support (610) is assembled on the main truss (200). Two sets of vibration generators (630) are also symmetrically arranged on the upper loosening support (610). The two ends of the buffer adjustment rod (640) are bolted to the upper loosening support (610) and the lower loosening support (620). Each set of deep trenching and loosening components (600) has multiple trenching and loosening teeth (650) arranged linearly on the lower loosening support (620). The trenching and loosening teeth (650) have a triangular prism rigid structure, with the tooth body gradually narrowing from the root to the top, the tooth tip having an acute angle design, and the middle of the tooth body convex symmetrically to both sides to form an arc-shaped guide surface.

3. The soil remediation equipment for contaminated sites as described in claim 2, characterized in that: The buffer adjustment rod (640) includes a connecting end (641) bolted to the upper soil loosening support (610) and the lower soil loosening support (620), a spiral cylinder (642) connected to the connecting end (641) on one side, and a spring seat (643) threaded onto the spiral cylinder (642). A guide rod (645) extends from the connecting end (641) on the other side. The guide rod (645) is inserted into the spiral cylinder (642) and is slidably connected to the spiral cylinder (642). A telescopic spring (644) is sleeved on the surface of the guide rod (645). One end of the telescopic spring (644) is connected to the connecting end (641), and the other end is connected to the surface of the spring seat (643).

4. The soil remediation equipment for contaminated sites as described in claim 3, characterized in that: The channel-targeted drug delivery assembly (500) also includes a drug control box (510), which is fixedly mounted on the truss platform (230) of the main truss (200). A drug inlet (511) is provided on its top. The number and position of the drug diversion and delivery pipes (520) correspond one-to-one with the trenching and loosening teeth (650) of the deep trenching and loosening assembly (600). The inner cavity of the pipes is connected to the liquid outlet of the drug control box (510). The bottom end of the drug diversion and delivery pipe (520) is bent away from the deep trenching and loosening assembly (600), and the opening of the bent end is provided with a conical opening groove (521), so that the opening end of the drug diversion and delivery pipe (520) forms a receiving slope with drug liquid discharge function. Multiple drug delivery grooves (522) extending along the drug liquid discharge direction are provided on the receiving slope.

5. The soil remediation equipment for contaminated sites as described in claim 4, characterized in that: The soil rotary tillage and pesticide mixing assembly (400) includes a connector (410) assembled below the main truss (200), a connecting bracket (420) hinged to the lower end of the connector (410), and two sets of L-shaped connecting plates (430) symmetrically assembled on both sides of the connecting bracket (420). The two sets of L-shaped connecting plates (430) are used to install the rotary tillage and soil disturbance unit. The rotary tillage and soil disturbance unit includes a rotary motor (440) fixed on an L-shaped connecting plate (430), an installation disc (450) mounted on the output end of the rotary motor (440), multiple roller mounting plates (460) arranged at equal intervals around the circumference on the installation disc (450), and multiple rotary tillage rollers (470) rotatably mounted on the roller mounting plates (460).

6. The soil remediation equipment for contaminated sites as described in claim 5, characterized in that: The connector (410) includes a telescopic boom (411), a boom spring (412), and a lifting hinge (413). The upper end of the telescopic boom (411) is rigidly connected to the main truss (200), and the lower end is rigidly connected to the lifting hinge (413). The upper surface of the connecting bracket (420) is provided with a protrusion that extends into the lifting hinge (413) and is rotatably connected to the lifting hinge (413) so that the connecting bracket (420) can deflect left and right at the hinge point of the lifting hinge (413). The boom spring (412) is sleeved on the outside of the telescopic boom (411), with its two ends abutting against the lower end face of the hoisting hinge (413) and the main truss (200), respectively.

7. The soil remediation equipment for contaminated sites as claimed in claim 6, characterized in that: The surface-enhanced spray assembly (300) includes an assembly base (310), a connecting main seat (320), and a high-pressure spray pipe (340). The assembly base (310) is fixedly installed at the tail of the main truss (200), with its upper end rigidly connected to the main body of the truss and its lower end tightly assembled with the connecting main seat (320). The connecting main seat (320) has a flow guide cavity inside and a liquid collection port (321) at its top. Multiple high-pressure hoses that connect to the high-pressure spray pipe (340) extend from the connecting main seat (320) into the flow guide cavity.

8. The soil remediation equipment for contaminated sites as claimed in claim 7, characterized in that: The surface reinforcement spray assembly (300) also includes a piping mounting bracket (330), which is fixedly installed at the bottom of the connection base (320) and extends outward in a radial pattern. Multiple high-pressure spray pipes (340) are evenly installed at the ends of the piping mounting bracket (330), with the liquid outlet of the high-pressure spray pipes (340) facing the soil surface.

9. A method for remediating soil contaminated sites, based on the soil remediation equipment for remediating soil contaminated sites as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. The walking mechanism (100) supports the front end of the main truss (200). The ditching and loosening teeth (650) of the deep ditching and loosening component (600) are inserted into the soil under the action of gravity and inclination to form a rear support point, so that the main truss (200) is in a forward tilting posture, and the ditching and loosening teeth (650) of the deep ditching and loosening component (600) at the front end of the main truss (200) are inserted into the soil to a predetermined depth under the action of gravity and inclination. S2. The walking mechanism (100) moves forward, and the deep trenching and loosening component (600) moves forward synchronously with the main truss (200). Under the vibration excitation of the vibration generator (630) and the adaptive buffer support of the buffer adjustment rod (640), the trenching and loosening teeth (650) continuously cut and break the soil, forming a continuous and unobstructed deep trench on the surface of the contaminated site, while guiding and throwing the turned-out soil to both sides of the trench. S3. The main control box (510) receives and distributes the remediation agent. The agent diversion and delivery pipe (520) delivers the agent in a directional manner to the deep trench corresponding to the trenching and loosening teeth (650). The agent is smoothly spread to the bottom of the deep trench along the inclined guide trench (522) at the curved end of the agent diversion and delivery pipe (520), so that the agent can fully contact the deep contaminated soil. S4. The soil rotary tillage and pesticide mixing component (400) moves forward with the main truss (200). The rotary motor (440) drives the mounting disc (450) to drive the rotary tillage drum (470) to rotate at high speed, forcibly turning and stirring the soil and pesticide in the deep trench where targeted pesticide delivery has been completed. The rotary tillage drum (470) fully mixes the pesticide in the deep trench with the surrounding loose soil, breaks up the soil aggregate structure, fills the deep trench and smooths the surface, forming a soil mixture layer with pesticide evenly distributed. S5. The surface reinforcement spraying component (300) sprays the agent in an atomized form onto the soil surface after rotary tillage and leveling through the high-pressure spray pipe (340), forming an atomized spraying surface covering the working width, and replenishing the agent to the surface soil.

10. A method for soil remediation at contaminated sites as described in claim 9, characterized in that: When the trenching and loosening tooth (650) encounters a soil obstacle, the telescopic spring (644) of the buffer adjustment rod (640) is compressed, and the guide rod (645) slides along the spiral cylinder (642) to absorb the impact load, so that the trenching and loosening tooth (650) adaptively bypasses the obstacle, and automatically resets after passing the obstacle by the rebound force of the telescopic spring (644) to maintain a stable soil penetration depth.

Images