Electrical property surveying device for researching underground landfill

Abstract

The utility model discloses an electrical property survey device for studying underground landfill, which belongs to the technical field of electrical property survey, and comprises a detection cable main line, the detection cable main line is composed of a plurality of detection cable branch lines, the detection cable branch lines are provided with electrode probes, the electrode probes extend into the ground through detection holes, and the electrode probes are arranged on the detection cable branch lines. The detection cable branch line is fixed through the fixing frame, the detection cable main line is connected with the industrial personal computer, and the industrial personal computer is connected with the power source. During specific implementation, stable current is supplied to the underground through the electrode probe extending into the underground from the detection hole, and the apparent resistivity is calculated and researched by observing the power supply current intensity and the potential difference between the measuring electrodes in the electrode probe through the industrial personal computer, so that the distribution of underground buried wastes or possibly polluted soil is deduced; when a plurality of detection cable branch lines are arranged, a long section of the detection cable branch lines are exposed on the ground, and the detection cable branch lines can be stored and arranged through the fixing frame to avoid mutual winding of the detection cable branch lines.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical surveying, in particular to an electrical surveying device for studying underground landfills. Background Art

[0002] Guangdong Province, for example, inspected and rectified 505 town-level improvised landfills in 2019, and added 182 in 2020. Numerous existing landfills across the province severely pollute the surrounding environment. Furthermore, since these landfills are largely undesigned and haphazardly filled, their actual size remains unknown, hindering the remediation of these projects.

[0003] In addition to conventional groundwater and surface water surveys and testing, landfill gas testing, and acquisition of geotechnical parameters and topographic data for the waste pile, preliminary investigations for the remediation of existing landfills also include investigations into the existing landfill volume. Currently, the calculation of the volume of existing landfills in China is primarily carried out through on-site excavation tests, drilling, and topographic mapping. Due to economic considerations, the number of boreholes is relatively small, making it impossible to conduct high-density, full-area drilling analysis. This results in a lack of representativeness in the boreholes, and inaccurate estimates of the volume of underground landfill waste. This leads to significant deviations in the calculation of the volume of the waste pile in subsequent stock remediation projects, resulting in extremely prominent budget inaccuracies. Therefore, the use of non-destructive and efficient landfill investigation technology will be beneficial to the implementation of existing municipal solid waste landfill remediation projects.

[0004] The multi-electrodes electrical method (MEM) is a type of electrical survey technique commonly used in shallow geophysical exploration. Its basic principle is to use a set of electrodes to supply a steady current to the ground, based on differences in dielectric resistivity. The intensity of the supplied current and the potential difference between the electrodes are then measured, allowing the calculation and study of the apparent resistivity. Combined with analogical analysis of resistance values of similar apparent resistivity, the distribution of buried waste or potentially contaminated soil can be inferred.

[0005] Therefore, it is necessary to design an electrical survey device for studying underground landfills using the high-density resistivity method. Utility Model Content

[0006] Purpose of the utility model: A device for studying the electrical properties of underground landfills to solve the above-mentioned problems existing in the prior art.

[0007] In order to solve the above technical problems, the utility model provides an electrical survey device for studying underground landfills, including a detection cable main line, the detection cable main line is composed of multiple detection cable branches, the detection cable branches are provided with electrode probes, the electrode probes extend into the ground through detection holes, the detection cable branches are fixed by a fixing frame, the detection cable main line is connected to an industrial computer, and the industrial computer is connected to a power supply.

[0008] As a preferred solution, the fixing frame includes a triangular support frame, on which a reeling rod for reeling in the detection cable branch line is provided. The triangular support frame consists of three support legs, and the length of the support legs can be adjusted by an extension mechanism.

[0009] As a preferred solution, the extension mechanism includes a rotating gear arranged in the support leg and rotatably connected to the support leg, a screw is arranged in the support leg, one end of the screw passes through the center of the rotating gear and is threadedly connected to the rotating gear, a sliding groove is opened on the support leg along its length direction, a sliding member is arranged in the sliding groove, one end of the sliding member is connected to the screw, and an adjustment component for driving the rotating gear to rotate is provided on the support leg.

[0010] As a preferred solution, the adjustment assembly includes a worm meshing with the rotating gear, a protective shell is provided on the outside of the worm, the worm is connected to one end of the rotating shaft, a rotating knob is provided on the outside of the protective shell, and the rotating knob is connected to the other end of the rotating shaft.

[0011] As a preferred solution, a weight block is provided on the triangular support frame.

[0012] As a preferred solution, a plurality of reinforcing ribs are provided on the weight block, and one end of the reinforcing rib is connected to the supporting leg.

[0013] As a preferred solution, the bottom end of the screw is configured to be needle-tip shaped.

[0014] As a preferred solution, a wire stop plate is provided at one end of the reeling rod, and a wire clamping groove is provided on the wire stop plate.

[0015] As a preferred solution, the distance between any two adjacent electrode probes is 2 meters.

[0016] Beneficial effects: The utility model relates to an electrical survey device for studying underground landfills. When in use, a stable current is supplied to the underground by extending the electrode probe into the ground from a detection hole. The industrial computer observes the power supply current intensity and the potential difference between the measuring electrodes in the electrode probe to calculate and study the apparent resistivity, so as to infer the distribution of underground buried waste or possible contaminated soil. When installing the electrode probe, a long section of the detection cable branch line will be exposed on the surface. The detection cable branch lines can be stored and sorted by the fixing frame to avoid multiple detection cable branch lines from being entangled with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram showing part of the structure of the present invention.

[0018] Figure 2 It is a schematic diagram showing the overall structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the overall structure of the fixing frame of the present utility model.

[0020] Figure 4 It is a partial structural diagram of the fixing frame of the present utility model.

[0021] Figure 5 It is a partial structural schematic diagram of the fixing frame of the utility model.

[0022] The reference numerals in the figure are: detection cable main line 1, detection cable branch line 2, fixing frame 3, electrode probe 4, industrial computer 5, power supply 6, supporting leg 7, reeling rod 8, screw 9, weight block 10, reinforcing rib 11, wire blocking plate 12, wire clamping groove 13, sliding groove 14, sliding part 15, protective shell 16, rotating knob 17, worm 18, rotating shaft 19, rotating gear 20. DETAILED DESCRIPTION

[0023] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0024] The applicant's research found that in addition to the conventional groundwater and surface water surveys and tests, landfill gas testing, and acquisition of geotechnical parameters and topographic data of the garbage dump, the preliminary investigation for the management of existing landfills also includes an investigation of the backfill volume of the existing landfill. At present, the backfill volume of existing landfills in China is mainly calculated through on-site excavation tests, drilling, and topographic mapping. Due to economic considerations, the number of boreholes is relatively small, and it is impossible to conduct high-density drilling analysis across the entire region. As a result, the boreholes are not representative enough, and the estimation of the volume of underground landfill waste is not accurate. This leads to large deviations in the calculation of the backfill volume of the later stock waste management project, resulting in extremely prominent budget inaccuracies.

[0025] To this end, the present invention provides a device for studying the electrical properties of underground landfills. Figures 1 to 5 The device includes a detection cable main line 1, which is composed of multiple detection cable branches 2. The detection cable branches 2 are provided with electrode probes 4, which are inserted into the ground through a detection hole. The detection cable branches 2 are fixed by a fixing frame 3. The detection cable main line 1 is connected to an industrial computer 5, and the industrial computer 5 is connected to a power supply 6. In specific implementation, a stable current is supplied to the ground by the electrode probes 4 inserted into the ground through the detection hole. The industrial computer 5 observes the supply current intensity and the potential difference between the measuring electrodes in the electrode probes 4 to calculate and study the apparent resistivity, so as to infer the distribution of underground waste or potentially contaminated soil. When the electrode probes 4 are installed, a long section of the detection cable branches 2 will be exposed on the surface. The detection cable branches 2 can be stored and sorted by the fixing frame 3 to avoid multiple detection cable branches 2 from being entangled with each other.

[0026] Preferably, the fixing frame 3 includes a triangular support frame, and the triangular support frame is provided with a reeling rod 8 for reeling in the detection cable branch line 2. In order to make the detection cable branch line 2 more reliably fixed, the triangular support frame is composed of three support legs 7, and the length of the support legs 7 can be adjusted by an extension mechanism; in specific implementation, the detection cable branch line 2 can be stored and sorted by winding the detection cable branch line 2 around the reeling rod 8. When the ground is uneven or the slope difference is large, the support legs 7 can be adjusted to a suitable length by the extension mechanism to make the fixation of the entire fixing frame 3 more stable.

[0027] Preferably, the extension mechanism includes a rotating gear 20 arranged in the support leg 7 and rotatably connected to the support leg 7, a screw 9 is arranged in the support leg 7, one end of the screw 9 passes through the center of the rotating gear 20 and is threadedly connected to the rotating gear 20, a sliding groove 14 is opened on the support leg 7 along its length direction, a sliding member 15 is arranged in the sliding groove 14, one end of the sliding member 15 is connected to the screw 9, and an adjustment component for driving the rotating gear 20 to rotate is provided on the support leg 7; in specific implementation, the rotating gear 20 is driven to rotate by the adjusting component, because the screw 9 is threadedly connected to the center of the rotating gear 20, and the screw 9 is restricted by the sliding groove 14 and cannot rotate with the rotating gear 20, so the screw 9 can only be extended and retracted up and down along its length direction, thereby achieving the purpose of adjusting the length of the support leg 7.

[0028] Preferably, the adjustment assembly includes a worm 18 meshing with the rotating gear, a protective shell 16 is provided on the outside of the worm 18, the worm 18 is connected to one end of the rotating shaft 19, a rotating knob 17 is provided on the outside of the protective shell 16, and the rotating knob 17 is connected to the other end of the rotating shaft 19; in specific implementation, the worm 18 is rotated by rotating the rotating knob 17, and the rotation of the worm 18 drives the rotating gear 20 to rotate, and the self-locking property of the worm gear transmission is utilized to prevent the screw 9 from being easily extended and retracted by external force.

[0029] Furthermore, in order to make the fixing of the fixing frame 3 more reliable, a weight block 10 is provided on the triangular support frame.

[0030] Furthermore, a plurality of reinforcing ribs 11 are provided on the weight block 10 , and one end of the reinforcing rib 11 is connected to the supporting leg 7 . The reinforcing rib 11 can improve the ability of the supporting leg 7 to resist external forces.

[0031] Preferably, in order to facilitate the insertion of the screw rod 9 into the mud, the bottom end of the screw rod 9 is configured to be needle-shaped.

[0032] Preferably, a wire stop plate 12 is provided at one end of the reeling rod 8, and a wire clamping groove 13 is opened on the wire stop plate 12. The detection cable branch line 2 wound on the reeling rod 8 is fixed by hanging the detection cable branch line 2 into the wire clamping groove 13.

[0033] Preferably, the distance between any two adjacent electrode probes 4 is 2 meters. Under this distance, the number of drill holes is relatively small and the measurement results are relatively ideal.

[0034] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. An electrical survey device for studying underground landfills, characterized in that: include: Detection cable main line; The detection cable main line is composed of multiple detection cable branches, each of which is provided with an electrode probe, which extends into the ground through a detection hole, and the detection cable branches are fixed by a fixing frame; The main line of the detection cable is connected to an industrial computer, and the industrial computer is connected to a power supply.

2. The electrical survey device for studying underground landfill according to claim 1, characterized in that: The fixing frame comprises: Triangle support frame; A reeling rod, provided on the triangular support frame and used for reeling in the detection cable branch line; The triangular support frame is composed of three support legs, and the length of the support legs can be adjusted by an extension mechanism.

3. The electrical survey device for studying underground landfills according to claim 2, characterized in that: The extension mechanism comprises: a rotating gear, disposed in the support leg and rotatably connected to the support leg; A screw rod is provided in the support leg, one end of which passes through the center of the rotating gear and is threadedly connected to the rotating gear; A sliding groove is provided on the support leg along the length direction of the support leg; a sliding member, disposed in the sliding groove and having one end connected to the screw; An adjusting assembly is provided on the supporting leg and is used for driving the rotating gear to rotate.

4. The electrical survey device for studying underground landfills according to claim 3, characterized in that: The adjustment component includes: a worm gear meshing with the rotating gear; A protective shell is arranged outside the worm; a rotating shaft, one end of which is connected to the worm; The rotating knob is arranged on the outside of the protective shell and is connected to the other end of the rotating shaft.

5. The electrical survey device for studying underground landfills according to claim 2, characterized in that: A weight block is provided on the triangular support frame.

6. The electrical survey device for studying underground landfills according to claim 5, characterized in that: The weight block is provided with a plurality of reinforcing ribs, and one end of the reinforcing rib is connected to the supporting leg.

7. The electrical survey device for studying underground landfills according to claim 3, characterized in that: The bottom end of the screw is configured to be needle-shaped.

8. The electrical survey device for studying underground landfills according to claim 2, characterized in that: A wire blocking plate is provided at one end of the reeling rod, and a wire clamping groove is provided on the wire blocking plate.

9. The electrical survey device for studying underground landfills according to claim 1, characterized in that: The distance between any two adjacent electrode probes is 2 meters.

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