Geophysical exploration electrical method device for measuring sliding direction and sliding speed of landslide mass

Abstract

The utility model relates to the technical field of landslide mass electrical prospecting, and discloses a geophysical prospecting electrical prospecting device for measuring the sliding direction and the sliding speed of a landslide mass, which comprises a detection mechanism, and the detection mechanism comprises an electrode N, a cable, a potential measuring instrument, an electrode M, a direct-current power supply, an electrode B, the ground, an electrode A and a drill hole. The electrode A is connected with the cable and extends to the ground from the deep position of the drill hole, the cable enables the direct-current power source to be communicated with the electrode B and the electrode A to form a power supply circuit and supplies power to the landslide mass to form a stable power supply field, the cable enables the potential measuring instrument to be communicated with the electrode N and the electrode M to form a potential measuring instrument, and the peripheral potential is measured with the drill hole as the center. Connecting a power supply device cable, a direct-current power supply, the electrode B and the electrode A to supply power underground to form a stable electric field; under the action of the detection mechanism, data are collected regularly and irregularly, and the data are analyzed to judge the change condition of the landslide, so that the sliding direction and the sliding speed are solved, and meanwhile, the sliding position can be determined. The protection mechanism is matched with the stabilizing mechanism, so that the cable can be prevented from being broken to a certain extent, meanwhile, it is guaranteed that the position of the cable in the drill hole is stable, and then the stability of a detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical prospecting for landslides, in particular to a geophysical prospecting electrical method device for measuring the sliding direction and sliding speed of a landslide body. Background Technique

[0002] Electrical prospecting is an important geophysical prospecting method widely used in the field of engineering investigation, which has the advantages of simple operation, controllable detection depth, and low cost.

[0003] Landslides are a common natural disaster in nature. Their occurrence is often accompanied by huge economic losses and even life-threatening in severe cases. Monitoring the trend of landslides in advance and providing early warnings can effectively avoid or reduce losses.

[0004] The existing detection methods have the following defects:

[0005] It can only be measured when the landslide has obvious manifestations such as ground fissures or even after it has occurred. The slow, uniform, and continuous micro-deformations occurring during its creeping deformation stage or landslide gestation stage cannot be observed in time. Content of the Utility Model

[0006] To solve the technical problem that the conventional detection method can only be measured when the landslide has obvious manifestations such as ground fissures or even after it has occurred, and the slow, uniform, and continuous micro-deformations occurring during its creeping deformation stage or landslide gestation stage cannot be observed in time, the utility model provides a geophysical prospecting electrical method device for measuring the sliding direction and sliding speed of a landslide body.

[0007] The utility model is realized by the following technical scheme: A geophysical prospecting electrical method device for measuring the sliding direction and sliding speed of a landslide body, including a detection mechanism. The detection mechanism includes electrode N, cable, potential measuring instrument, electrode M, DC power supply, electrode B, ground, electrode A, and borehole. Electrode A is connected to the cable and extends from the deep part of the borehole to the ground. The cable connects the DC power supply with electrode B and electrode A to form a power supply circuit, supplying power to the landslide body to form a stable power field. The cable connects the potential measuring instrument with electrode N and electrode M to form a potential measuring instrument, measuring the potential around with the borehole as the center, and connecting the cable of the power supply device, DC power supply, electrode B, and electrode A to supply power to the ground to form a stable electric field.

[0008] Through the above technical scheme, by regularly and irregularly collecting data under the action of the detection mechanism, analyzing the data can judge the change situation of the landslide, thereby calculating the sliding direction and sliding speed, and at the same time, the position where the sliding occurs can also be determined.

[0009] Meanwhile, use a drill to drill the borehole into the deep stable rock formation to enhance the stability of the overall detection.

[0010] As a further improvement of the above solution, a protection mechanism is provided on the ground of the borehole. The protection mechanism includes a mounting frame, a first magnet and a second magnet. The mounting frame is fixed to the ground by screws and covers the borehole. A protective cover is hinged on the mounting frame. The first magnet is fixed on the protective cover, and the second magnet is fixed on the mounting frame, and the first magnet and the second magnet can adsorb each other.

[0011] Through the above technical solution, by providing a protection mechanism on the borehole, and the protective cover is stably installed on the mounting frame through the first magnet and the second magnet. To a certain extent, it can ensure that the materials on the ground will not enter the borehole and affect the detection of electrode A, thereby enhancing the stability of the overall detection.

[0012] As a further improvement of the above solution, a clamping unit is provided on the inner wall of the mounting frame. The clamping unit includes a penetration groove, a top plate, a sliding rod, a sliding sleeve block, a first spring and an arc-shaped frame. The penetration groove is opened in the mounting frame for the cable and electrode A to pass through. The top plate is fixed inside and outside the mounting frame above the penetration groove. Both ends of the sliding rod are fixed inside the top plate. The two sliding sleeve blocks slide on the sliding rod. Both ends of the first spring are welded to adjacent ends of the sliding sleeve block, and the middle of the first spring is wound around the sliding rod. One end of the arc-shaped frame is fixed to the sliding sleeve block, and the sliding sleeve block can clamp the cable.

[0013] Through the above technical solution, by opening a penetration groove on the mounting frame for the cable to extend into the borehole without affecting the protection of the borehole by the mounting frame. And under the action of the elastic potential energy of the first spring, the two arc-shaped frames can stably clamp the cable, protecting the bent part where the cable contacts the penetration groove, extending the service life of the cable, and preventing breakage caused by long-term friction.

[0014] At the same time, the sliding sleeve block slides on the sliding rod, which can make the position of the arc-shaped frame stable and can only move horizontally.

[0015] As a further improvement of the above solution, a hose is installed on the inner wall of the mounting frame by bolts, and multiple hoses can be threadedly connected. A stabilizing mechanism is also provided on the hose.

[0016] Through the above technical solution, by threadedly assembling multiple hoses and extending the hoses into the borehole, it can cooperate with the stabilizing mechanism to make the position of the cable in the borehole in a relatively stable vertical state. Then, when using electrode A to release voltage for detection later, the position movement amplitude is small, and thus the detection result is more stable.

[0017] As a further improvement of the above solution, the stabilizing mechanism includes a ring frame, a second spring, and a limiting cylinder. One end of the ring frame is fixed with a long rod, and the other end of the long rod is fixed to the flexible hose. One ends of the four second springs are all welded inside the ring frame, and the other ends of the four second springs are all welded to the mutually remote ends of the limiting cylinder.

[0018] Through the above technical solution, by placing the cable coil inside the ring frame, when the cable is used in cooperation with electrode A for detection, the maximum movement range of the cable is only within the ring frame. This can reduce the situation where the movement of the cable drives electrode A and affects the detection result. At the same time, using multiple second springs to clamp the cable can not only protect the cable but also limit the cable.

[0019] As a further improvement of the above solution, a plurality of balls are rollingly embedded at the adjacent ends of the two limiting cylinders, and the balls can contact the cable or electrode A.

[0020] Through the above technical solution, by providing a plurality of balls, the friction force of the cable when moving inside the ring frame is reduced, thereby enhancing the smoothness and not affecting the stability of the cable at the same time.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] First, under the action of the detection mechanism, by regularly and irregularly collecting data and analyzing the data, the change situation of the landslide can be judged. Based on this, the sliding direction and sliding speed can be obtained, and at the same time, the position where the sliding occurs can also be determined.

[0023] Second, through the cooperation of the protection mechanism and the stabilizing mechanism, the cable can be prevented from breaking to a certain extent, and at the same time, the position of the cable in the drill hole is ensured to be stable, thereby improving the stability of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view sectional structure schematic diagram of a geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body provided in Embodiment 1 of the present utility model;

[0025] Figure 2 It is a three-dimensional structure schematic diagram of the stabilizing mechanism of a geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body;

[0026] Figure 3 It is a side view sectional structure schematic diagram of the clamping mechanism of a geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body;

[0027] Figure 4 It is a geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body Figure 1Schematic diagram of the enlarged structure at A in the [Chinese context].

[0028] Main symbol explanations:

[0029] 1. Electrode N; 2. Cable; 3. Potential measuring instrument; 4. Electrode M; 5. DC power supply; 6. Electrode B; 7. Ground; 8. Electrode A; 9. Borehole; 10. Installation frame; 11. Insertion groove; 12. Top plate; 13. Slide bar; 14. Sliding sleeve block; 15. Spring 1; 16. Arc-shaped frame; 17. Magnet 1; 18. Magnet 2; 19. Hose; 20. Ring frame; 21. Spring 2; 22. Limiting cylinder; 23. Ball. Specific implementation manners

[0030] Next, in combination with the drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0031] Embodiment 1:

[0032] Please refer to Figures 1-4 , A geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body in this embodiment includes a detection mechanism. The detection mechanism includes electrode N1, cable 2, potential measuring instrument 3, electrode M4, DC power supply 5, electrode B6, ground 7, electrode A8, and borehole 9. Electrode A8 is connected to cable 2 and extends from the deep part of borehole 9 to the ground. Cable 2 connects DC power supply 5 with electrode B6 and electrode A8 to form a power supply circuit, supplying power to the landslide body to form a stable power field. Cable 2 connects potential measuring instrument 3 with electrode N1 and electrode M4 to form potential measuring instrument 3, measuring the potential around with the borehole as the center. Connect the cable 2 of the power supply device, DC power supply 5, electrode B6, and electrode A8 to supply power underground to form a stable electric field.

[0033] There is a protection mechanism on the ground 7 of borehole 9. The protection mechanism includes installation frame 10, magnet 1 17, and magnet 2 18. Installation frame 10 is fixed on the ground 7 by screws and covers borehole 9. A protection cover is hinged on installation frame 10. Magnet 1 17 is fixed on the protection cover, and magnet 2 18 is fixed on installation frame 10, and magnet 1 17 and magnet 2 18 can adsorb to each other.

[0034] The implementation principle of a geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body in an embodiment of this application is as follows: First, use a drill to drill a borehole 9 in the ground 7, then use screws to install installation frame 10 around borehole 9. According to the depth of the borehole, thread-assemble multiple hoses 19 to form a long tube that can be placed into borehole 9 from within installation frame 10, and the end of hose 19 located within installation frame 10 is fixed within installation frame 10 using bolts.

[0035] Then, a plurality of electrodes A8 are arranged on the cable 2 at an equal distance interval of 1 meter. One end of the cable 2 is inserted through the insertion groove 11 and enters the installation frame 10. When the cable 2 passes through the insertion groove 11, the two sliding sleeve blocks 14 slide outside the sliding rod 13, stretching the first spring 15, so that the two arc-shaped frames 16 can clamp the cable 2. The end of the cable 2 located in the installation frame 10 passes through the two limiting cylinders 22 and contacts the balls 23. Gradually, the cable 2 is put into the drilling hole 9. Under the action of gravitational potential energy, the plurality of balls 23 roll along with the cable 2, so that the cable 2 can stably enter the next limiting cylinder 22 and continue to move downward in contact with the balls 23, thereby ensuring that the cable 2 can stably enter the deep part of the drilling hole 9.

[0036] The electrode N1 and the electrode M4 are made of the same material and have a length of 40 cm; the electrode B6 is made of the same material and has a length of 60 cm; the electrode A8 is made of iron material with a circular diameter of 3 cm. It is connected to the cable 2 and extends to the ground. The cable 2 connects the DC power supply 5 with the electrode B6 and the electrode A8 to form a power supply circuit, supplying power to the landslide to form a stable power field. The cable 2 connects the potential measuring instrument 3 with the electrode N1 and the electrode M4 to form the potential measuring instrument 3 to measure the potential around the drilling hole.

[0037] The electrodes A8 are arranged at intervals of 1 m in depth and connected to the ground through the cable 2.

[0038] Connect the cable 2 of the power supply device, the DC power supply 5, the electrode B6 and the electrode A8 to supply power underground to form a stable electric field.

[0039] Connect the potential measuring instrument 3 with the cable 2, the electrode N1 and the electrode M4.

[0040] Replace the electrodes A8 at different depths from shallow to deep to supply power underground respectively, and measure the equipotential lines near the drilling hole 9 at the same time.

[0041] After a certain time t, repeat the above measurement work.

[0042] If the equipotential lines measured each time coincide, the landslide has not occurred. If they do not coincide, it means that the landslide has occurred. Then, the sliding direction and speed v = x / t can be obtained according to the moving direction and distance x of the equipotential lines, and the sliding depth can be determined according to the electrode A8 where the equipotential lines start to move.

[0043] Embodiment 2:

[0044] Combined with Figures 1-4, on the basis of Embodiment 1, the further improvement of this embodiment lies in that: a clamping unit is provided on the inner wall of the installation frame 10. The clamping unit includes an insertion groove 11, a top plate 12, a sliding rod 13, a sliding sleeve block 14, a first spring 15 and an arc-shaped frame 16. The insertion groove 11 is opened in the installation frame 10 for the cable 2 and the electrode A8 to pass through. The top plate 12 is fixed inside and outside the installation frame 10 above the insertion groove 11. Both ends of the sliding rod 13 are fixed inside the top plate 12. Two sliding sleeve blocks 14 slide on the sliding rod 13. Both ends of the first spring 15 are welded to the adjacent ends of the sliding sleeve blocks 14, and the middle of the first spring 15 is wound around the sliding rod 13. One end of the arc-shaped frame 16 is fixed to the sliding sleeve block 14, and the sliding sleeve block 14 can clamp the cable 2.

[0045] A hose 19 is installed on the inner wall of the installation frame 10 by bolts, and a plurality of hoses 19 can be threadedly connected. A stabilizing mechanism is also provided on the hose 19.

[0046] The stabilizing mechanism includes a ring frame 20, a second spring 21 and a limiting cylinder 22. One end of the ring frame 20 is fixed with a long rod, and the other end of the long rod is fixed to the hose 19. One ends of four second springs 21 are all welded inside the ring frame 20, and the other ends of the four second springs 21 are all welded to the mutually remote ends of the limiting cylinder 22.

[0047] A plurality of balls 23 are rollingly embedded at the adjacent ends of the two limiting cylinders 22, and the balls 23 can contact the cable 2 or the electrode A8.

[0048] The above-mentioned implementation manners are only the preferred implementation manners of the present utility model, and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present utility model all belong to the protection scope required by the present utility model.

Claims

1. A geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body, characterized in that Including: A detection mechanism, the detection mechanism includes electrode N, a cable, a potential measuring instrument, electrode M, a DC power supply, electrode B, the ground, electrode A and a drill hole. Electrode A is connected to the cable and extends from the deep part of the drill hole to the ground. The cable connects the DC power supply with electrode B and electrode A to form a power supply circuit, supplying power to the landslide to form a stable power field. The cable connects the potential measuring instrument with electrode N and electrode M to form a potential measuring instrument, measuring the potential around with the drill hole as the center. Connect the cable of the power supply device, the DC power supply, electrode B and electrode A to supply power underground to form a stable electric field.

2. The geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body according to claim 1, characterized in that, A protection mechanism is provided on the ground of the drill hole. The protection mechanism includes a mounting frame, magnet one and magnet two. The mounting frame is fixed on the ground by screws and covers the drill hole. A protective cover is hinged on the mounting frame. Magnet one is fixed on the protective cover. Magnet two is fixed on the mounting frame, and magnet one and magnet two can adsorb each other.

3. The geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body according to claim 2, characterized in that, A clamping unit is provided on the inner wall of the mounting frame. The clamping unit includes a penetration groove, a top plate, a sliding rod, a sliding sleeve block, spring one and an arc-shaped frame. The penetration groove is opened in the mounting frame for the cable and electrode A to pass through. The top plate is fixed inside and outside the mounting frame above the penetration groove. Both ends of the sliding rod are fixed inside the top plate. The two sliding sleeve blocks slide on the sliding rod. Both ends of spring one are welded to an adjacent end of the sliding sleeve block, and the middle part of spring one is wound around the sliding rod. One end of the arc-shaped frame is fixed on the sliding sleeve block, and the sliding sleeve block can clamp the cable.

4. The geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body according to claim 3, wherein, A hose is installed on the inner wall of the mounting frame by bolts, and multiple hoses can be threadedly connected. A stabilizing mechanism is also provided on the hose.

5. A geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body, characterized in that, The stabilizing mechanism includes a ring frame, spring two and a limiting cylinder. One end of the ring frame is fixed with a long rod, and the other end of the long rod is fixed to the hose. One ends of the four spring twos are welded inside the ring frame, and the other ends of the four spring twos are welded to the mutually remote ends of the limiting cylinder.

6. The geophysical exploration electrical method device for measuring the sliding direction and sliding speed of a landslide body according to claim 5, characterized in that, A plurality of balls are rollingly embedded in the adjacent ends of the two limiting cylinders, and the balls can contact the cable or electrode A.

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