Heavy metal contaminated soil excavation and resource utilization auxiliary device

Abstract

The utility model relates to the technical field of auxiliary device, concretely relates to a heavy metal pollution soil excavation and resource auxiliary device, including positioning rod, angle point block and intermediate block, the angle point block has segmented sleeve and fastener, the intermediate block has fastener, the angle point block passes through the positioning rod and enters the segmented sleeve and carries out plane positioning, the angle point block, the intermediate block between through the fastener horizontal connection, form a continuous enclosure ring, the upper end of angle point block and intermediate block is equipped with wedge mouth, and the lower end is equipped with wedge, through the wedge mouth with the wedge carries out vertical connection, and fixes through fixed bolt. Through positioning rod and segmented sleeve, establish pollution boundary angle point coordinate, fastener horizontal connection, form the closed surface without gap, replace the benching excavation, and the pollution exposure area reduces, and the wedge mouth and the wedge structure, the standardization interface ensures that each layer thickness is uniform, and the angle point block and the intermediate block are freely combined, and adapt to any pollution area shape.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary device technology, specifically to an auxiliary device for excavation and resource recovery of heavy metal contaminated soil. Background Technology

[0002] Urban industrial relocation is an important aspect of urban renewal. The relocation and replacement of old industrial enterprises, especially those involved in smelting and calcination, often results in heavy metal pollution. However, such industrial legacy sites are generally located in city centers, possess significant development value, and are important resources accompanying urban layout adjustments and industrial restructuring, making soil remediation necessary. The existing method of excavating contaminated soil using natural slope excavation has increased the volume of contaminated soil. For adjacent soils of different types, it is impossible to excavate accurately, leading to secondary pollution. Resource products are piled up using natural slopes, resulting in a reduction in the amount of stockpiled or an expansion of the stockpiling area. It is difficult to meet the needs of concentrated backfilling of the same pollutants, which is not conducive to the self-balancing of the contaminated soil site. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an auxiliary device for excavation and resource recovery of heavy metal contaminated soil. This device addresses the problems of secondary pollution caused by the expansion of the contamination range during excavation and the inability to accurately control and balance the stockpiling range of resource recovery products during the excavation process, which are problems that cannot be solved by existing methods.

[0004] One embodiment of this utility model provides an auxiliary device for excavation and resource utilization of heavy metal contaminated soil, which is used to form an enclosing ring when excavating contaminated soil or landfilling resource products, and includes a positioning rod, a corner block and a middle block. The corner block has segmented sleeves and fasteners, and the middle block has fasteners; The corner block is positioned horizontally by the positioning rod passing through the segmented sleeve. The corner block and the middle block are horizontally connected by the fastener to form a continuous enclosing ring. The corner block and the middle block are provided with a wedge at the upper end and a wedge at the lower end. They are vertically connected through the wedge and the wedge and fixed by fixing bolts.

[0005] This utility model discloses an auxiliary device for excavation and resource recovery of heavy metal contaminated soil. It establishes the coordinates of the corner points of the contaminated boundary using positioning rods and segmented sleeves. Horizontal connections with fasteners form a gapless closed surface, replacing slope excavation and reducing the contaminated exposure area. The wedge-shaped structure and standardized interfaces ensure uniform thickness for each layer. Corner blocks and intermediate blocks can be freely combined to adapt to any contaminated area shape. This utility model employs a multi-layer extension design to meet the remediation needs of deep-area contaminated soil. Through positioning, enclosure, and layering, it becomes the core carrier for a closed-loop technology of "precise excavation - in-situ backfilling - on-site balancing," overcoming interference between different contaminated soils and meeting the requirements for self-balancing and precise stacking.

[0006] In one embodiment, the corner block has a segmented sleeve on one side and a fastener on the other side.

[0007] In one embodiment, fasteners are provided on both sides of the intermediate block.

[0008] In one embodiment, the positioning rod is provided with a positioning control line for determining the depth using a wireless level. In one embodiment, the corner block and the middle block are provided with upper control lines and lower control lines.

[0009] In one embodiment, the portion below the lower control line is embedded in the soil to a depth of 0.6 times the excavation or backfill volume, forming a cantilever structure to ensure self-stability.

[0010] In one embodiment, the corner block is connected to the positioning rod by a segmented sleeve fitted onto the positioning rod. In one embodiment, the fastener is a detachable fastener used for horizontal connection between corner blocks and middle blocks.

[0011] In one embodiment, when the wedge and the wedge are vertically connected, the distance between the upper and lower control lines of adjacent blocks is consistent with the thickness of the layered excavation or backfill.

[0012] In one embodiment, the device is vertically extendable and can perform multi-layer filling or excavation on corresponding blocks through a wedge-shaped structure; The corner block and the middle block are provided with fixing screw holes, which are located below the fixing bolts.

[0013] The above technical solution provides an auxiliary device for excavation and resource recovery of heavy metal contaminated soil, which has the following beneficial effects: 1. By horizontally connecting the corner blocks and the middle blocks with fasteners, a rigid and seamless vertical enclosure is formed, strictly confining the target contaminated soil within the closed boundary. This structure completely replaces the traditional natural slope excavation method, fundamentally avoiding contact interference between adjacent different types of contaminated soil or between contaminated soil and clean soil, and eliminating the risk of secondary pollution caused by pollutant migration during excavation.

[0014] 2. By utilizing the vertical joint structure of wedges, the height of each backfill or stacking layer is strictly consistent with the standard layer thickness. Combined with the vertical boundary constraint of the enclosure ring, resource-based products, such as immobilized contaminated soil, can be densely and neatly stacked vertically, significantly improving the stacking efficiency per unit area, while meeting the site self-balancing requirements for centralized backfilling of the same type of pollutant.

[0015] 3. The control lines on the positioning rod, combined with a wireless level, enable millimeter-level precision control of excavation and backfill depth. The modular assembly design of corner blocks and intermediate blocks makes the construction of the enclosure ring resemble assembling standardized components, significantly reducing human error. The entire process, from positioning and excavation to backfilling, is completed within a pre-defined geometric and elevation framework, ensuring a high degree of control over construction quality.

[0016] 4. The device is designed to be embedded in the soil below the lower control line (the embedding depth is in a fixed ratio to the excavation / backfill volume), which allows the corner blocks and middle blocks to naturally form a cantilever effect in the soil. This self-stabilizing mechanism can maintain the rigidity of the enclosure ring without additional support structures, simplifying the construction process and ensuring the safety and stability of excavation and backfilling operations.

[0017] 5. Vertically, the wedge-shaped interfaces extend the blocks, allowing for flexible adaptation to deep-seated excavation or multi-layer backfilling in contaminated soil. Horizontally, fasteners enable quick assembly and disassembly, allowing the same unit to be reused in different work areas. This design significantly expands the application scenarios of the unit while reducing material input costs during long-term construction.

[0018] 6. The device, through its integrated design of precise isolation of contaminated soil and on-site resource-based product backfilling, directly supports a remediation model that simultaneously promotes the remediation and redevelopment of contaminated sites. It not only meets the environmental remediation requirements for preventing the spread of pollutants but also provides treated and stable backfill materials for the site construction phase, achieving a balance between ecological benefits and development efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a partial structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the intermediate block of this utility model; Figure 3 This is a schematic diagram of the corner block of this utility model; Figure 4 This is a planar schematic diagram of the pressed-in corner block; Figure 5 This is a plan view of the enclosing circle; Figure 6 This is a cross-sectional schematic diagram of the corner block pressed into this utility model; Figure 7 This is a schematic cross-sectional view of the layered excavation.

[0021] The markings in the diagram are explained as follows: 110. Positioning rod; 111. Segmented bushing; 112. Positioning control lines; 210. Corner Block; 220. Intermediate block; 230. Fasteners; 240. Upper control line; 250. Lower control line; 310. Wedge; 320. Wedge; 330. Fixing bolts; 340. Fixing screw hole; 410. Soil within the control area; 420. Soil outside the control area; 430. Excavate the soil. Detailed Implementation

[0022] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the so-called equivalent implementations or modifications of the present utility model should be included in the patent scope of this case.

[0023] Combination Figures 1 to 7 As shown, one embodiment of this utility model provides an auxiliary device for excavation and resource utilization of heavy metal contaminated soil, which is used to form an enclosing ring when excavating contaminated soil or landfilling resource utilization products, including a positioning rod 110, a corner block 210 and a middle block 220. The corner block 210 has a segmented sleeve 111 and a fastener 230, and the middle block 220 has a fastener 230; The corner block 210 is positioned horizontally by the positioning rod 110 passing through the segmented sleeve 111. The corner block 210 and the middle block 220 are horizontally connected by the fastener 230 to form a continuous enclosing ring. The corner block 210 and the middle block 220 are provided with a wedge 310 at the upper end and a wedge 320 at the lower end. They are vertically connected through the wedge 310 and the wedge 320 and fixed by a fixing bolt 330.

[0024] This utility model discloses an auxiliary device for excavation and resource recovery of heavy metal contaminated soil. It establishes the absolute coordinates of the contaminated boundary through a positioning rod 110 and segmented sleeves 111. Fasteners 230 connect horizontally, forming a gapless closed surface, replacing slope excavation and reducing the contaminated exposure area. The wedge structure 310 and wedge 320, with standardized interfaces, ensure uniform thickness for each layer. Corner blocks 210 and intermediate blocks 220 can be freely combined to adapt to any contaminated area shape. This utility model employs a multi-layer extension design to meet the remediation needs of deep-area contaminated soil. Through positioning, enclosure, and layering, it becomes the core carrier for a closed-loop technology of "precise excavation-in-situ backfilling-on-site balancing," overcoming interference between different contaminated soils and meeting the requirements for self-balancing precise stacking.

[0025] In this embodiment, spatial coordinates are established by positioning rod 110, and corner block 210 and middle block 220 are horizontally connected by fastener 230 to form a rigid enclosure ring, which, together with wedge-shaped interface, achieves vertical layer control. This design simultaneously meets the requirements for precise boundary constraints in contaminated soil excavation and the vertical stacking of resource products, fundamentally blocking the spread of pollutants and improving site utilization efficiency.

[0026] In one embodiment, the corner block 210 is provided with a segmented sleeve 111 on one side and a fastener 230 on the other side.

[0027] In this embodiment, one side of the corner block 210 is a segmented sleeve 111 (connecting the positioning rod 110), and the other side is a fastener 230 (connecting the middle block 220). This split-side layout ensures that the device can simultaneously achieve accurate positioning and rapid enclosure expansion, solving the problem of uncontrolled excavation range of contaminated soil caused by corner area positioning errors in traditional processes.

[0028] In one embodiment, fasteners 230 are provided on both sides of the intermediate block 220.

[0029] In this embodiment, fasteners 230 are required on both sides of the intermediate block 220 to support the continuous fastening of multiple intermediate blocks 220 to form an enclosing boundary of arbitrary length. This design greatly improves the adaptability of the device to irregular contaminated areas and avoids construction interruption or joint contamination leakage due to insufficient boundary length.

[0030] In one embodiment, the positioning rod 110 is provided with a positioning control line 112 for determining the depth using a wireless level. In this embodiment, the positioning rod 110 is further equipped with a positioning control line 112, which, combined with a wireless level, enables millimeter-level depth calibration. This feature completely eliminates reliance on manual experience for elevation control during layered excavation / backfilling of contaminated soil, ensuring that each working layer strictly meets the technical thickness requirements for environmental remediation.

[0031] In one embodiment, the corner block 210 and the middle block 220 are provided with an upper control line 240 and a lower control line 250.

[0032] In this embodiment, upper control lines 240 and lower control lines 250 are set on corner block 210 and middle block 220 to clearly define the working thickness range of a single excavation or backfilling operation. This design provides intuitive guidance for construction personnel and prevents pollution control failure or uneven density of resource-based products caused by over-excavation or under-excavation.

[0033] In one embodiment, the portion below the lower control line 250 is embedded in the soil to a depth of 0.6 times the excavation or backfill volume, forming a cantilever structure to ensure self-stability.

[0034] In this embodiment, a fixed ratio is defined for the embedment depth of the soil below the lower control line (250mm) to the excavation / backfill volume, forming a mechanically self-stabilizing cantilever structure. This feature eliminates the need for traditional support measures, significantly simplifying the process while ensuring construction safety, and is particularly suitable for operations in contaminated soil in soft strata.

[0035] In one embodiment, the corner block 210 is connected to the positioning rod 110 by a segmented sleeve 111 fitted onto the positioning rod 110. In this embodiment, the corner block 210 is connected to the positioning rod 110 by directly fitting the segmented sleeve 111 into it. This mechanical interlocking design eliminates positioning deviations caused by construction vibrations, ensures the absolute accuracy of the boundary coordinates of the contaminated soil, and implements the technical goal of "precision excavation" from a hardware perspective.

[0036] In one embodiment, the fastener 230 is a detachable fastener 230 used for horizontal connection between corner block 210 and middle block 220.

[0037] In this embodiment, the fastener 230 adopts a detachable design, enabling instantaneous engagement and non-destructive separation of the corner block 210 and the middle block 220. This feature directly supports the rapid turnover of the device, meeting the timeliness requirements of continuous multi-area operations in large-scale contaminated site remediation.

[0038] In one embodiment, when the wedge 310 and the wedge 320 are vertically connected, the distance between the upper control line 240 and the lower control line 250 of adjacent blocks is consistent with the thickness of the layered excavation or backfill.

[0039] In this embodiment, when the wedge 310 and the wedge 320 are connected, the spacing between the upper and lower control lines 250 of adjacent blocks is strictly consistent with the standard layer thickness. This interface design forces uniformity in the thickness parameters of all working layers, ensuring the density uniformity of resource-based product stockpiling or contaminated soil backfilling.

[0040] In one embodiment, the device is vertically extendable and can perform multi-layer filling or excavation on corresponding blocks through a wedge-shaped structure; The corner block 210 and the middle block 220 are provided with fixing screw holes 340, which are located below the fixing bolts 330.

[0041] In this embodiment, the device achieves vertical extension through a wedge-shaped structure, allowing for the stacking of work units on a single-layer enclosure. This feature overcomes the physical limitations of excavation depth or backfill height, providing technical feasibility for the remediation of deeply buried contaminated soil and the stacking of high-rise resource-based products.

[0042] It should be noted that the fixing bolt 330 is a metal bolt used to vertically penetrate and lock the upper and lower components (such as the corner block and the middle block 220); the fixing screw hole 340 is a pre-drilled hole with internal threads on the component for the bolt to be screwed in and engaged.

[0043] Furthermore, such as Figure 7 As shown, the soil 410 within the control area is the vertical working area of ​​the corner block / middle block 220, which is the precise operating range for layered excavation of contaminated soil or backfilling with resource-based products. The soil outside the control area, 420, is soil that is not directly constrained by the device; Excavated soil 430 refers to the soil that needs to be removed during the installation of the device.

[0044] The working principle of this utility model: Excavation of a specified type of contaminated soil includes the following steps: The first step is to locate the corner points according to the range and drive the positioning rods 110 into the corner points. Using the positioning control line 112 on the positioning rods 110 and a wireless level, determine the depth of the positioning rods 110. The second step is to install corner block 210 according to the range and positioning rod 110, so that the top of corner block 210 is at the same height as positioning control line 112; The third step involves sequentially inserting intermediate blocks 220 according to the defined area and corner blocks 210, ensuring that the tops of corner blocks 210 and intermediate blocks 220 are at the same height, forming an enclosed ring. The contaminated soil within this ring is then excavated to the lower control line 250. Based on the requirements for layered excavation of the contaminated soil, this is generally done in 500mm layers. After excavation, the recovery device is installed.

[0045] The procedures for landfilling or stockpiling specified types of contaminated soil similarly include the following steps: The first step is to locate the corner points according to the range and drive the positioning rods 110 into the corner points. Using the positioning control line 112 on the positioning rods 110 and a wireless level, determine the depth of the positioning rods 110.

[0046] The second step is to install corner blocks 210 according to the range and positioning rod 110, so that the top of corner blocks 210 is at the same height as positioning control line 112.

[0047] The third step is to drive in the middle block 220 in sequence according to the range and corner block 210, so that the top of the corner block 210 and the middle block 220 are at the same height to form an enclosing ring. According to the backfilling requirements of the treated soil layers (generally 500mm / layer), backfill to the upper control line 240. After completion, backfill the outer soil to the upper control line 240.

[0048] If there are multiple layers in the fourth step, backfill the corresponding blocks using a wedge structure, following the third step, backfilling to the control line 250 below the second layer block, and backfill the outer soil to the control line 250 below the second layer block.

[0049] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made using the paper parts and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. An auxiliary device for excavation and resource recovery of heavy metal contaminated soil, used to form an enclosing ring during the excavation of contaminated soil or the landfilling and stockpiling of resource recovery products, characterized in that... It includes a positioning rod (110), a corner block (210), and a middle block (220). The corner block (210) has a segmented sleeve (111) and a fastener (230), and the middle block (220) has a fastener (230). The corner block (210) is positioned horizontally by the positioning rod (110) passing through the segmented sleeve (111). The corner block (210) and the middle block (220) are horizontally connected by the fastener (230) to form a continuous enclosing ring. The corner block (210) and the middle block (220) are provided with a wedge (310) at the upper end and a wedge (320) at the lower end. They are vertically connected through the wedge (310) and the wedge (320) and fixed by a fixing bolt (330).

2. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The corner block (210) has a segmented sleeve (111) on one side and a fastener (230) on the other side.

3. An auxiliary device for excavation and resource recovery of heavy metal contaminated soil according to claim 1 or 2, characterized in that, Fasteners (230) are provided on both sides of the intermediate block (220).

4. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The positioning rod (110) is provided with a positioning control line (112) for determining the depth with the help of a wireless level.

5. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The corner block (210) and the middle block (220) are provided with an upper control line (240) and a lower control line (250).

6. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 5, characterized in that, The portion below the lower control line (250) is embedded in the soil, with an embedding depth of 0.6 times the excavation or backfill volume, forming a cantilever structure to ensure self-stability.

7. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The corner block (210) and the positioning rod (110) are connected by a segmented sleeve (111) inserted into the positioning rod (110).

8. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The fastener (230) is a detachable fastener (230) used for the horizontal connection between the corner block (210) and the middle block (220).

9. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, When the wedge (310) and the wedge (320) are vertically connected, the distance between the upper control line (240) and the lower control line (250) of the adjacent blocks is consistent with the thickness of the layered excavation or backfill.

10. The auxiliary device for excavation and resource utilization of heavy metal contaminated soil according to claim 1, characterized in that, The device can be extended vertically and uses a wedge-shaped structure to perform multi-layer filling or excavation on the corresponding blocks; The corner block (210) and the middle block (220) are provided with fixing screw holes (340), which are located below the fixing bolt (330).

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