A strong effect pre-prepared magnetic field layout system and layout method

Abstract

The application provides a strong effect pre-prepared magnetic field laying system and laying method, which comprises a power supply arranged outside a drill hole, a control system, a traction mechanism and a laying probe placed in the drill hole; the laying probe comprises a shell and a conveying device, a rotating device and a telescopic top stretching device fixedly connected in the shell; a laying work window is arranged on the shell; the conveying device comprises a servo motor, a synchronous pulley, a pulley shaft, a pulley bearing, a synchronous belt and a plurality of insulating fixed grooves fixed on the synchronous belt; the synchronous belt is arranged along the height direction of the laying probe; the rotating device comprises a motor, a main shaft and a base fixedly connected to the main shaft, and the main shaft is horizontally arranged; the top stretching device is fixedly connected to the base, and the top stretching device comprises a grabbing groove and an electromagnetic sheet arranged in the grabbing groove. The application can effectively solve the problems of small pre-prepared magnetic field effect, weak monitoring signal and poor detection stability, and can meet the application scene of large displacement of deep deformation of landslide.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of landslide disaster monitoring and early warning, more specifically, it relates to a strong effect prefabricated magnetic field layout system and a layout method. BACKGROUND

[0002] Landslide disaster, as one of the major geological disasters commonly seen in nature, has great harmfulness. Landslide disasters in China are numerous, widespread, and frequent. The direct economic losses caused by landslides each year amount to tens of billions of yuan. Therefore, how to effectively monitor landslides is an extremely important issue in disaster prevention.

[0003] Displacement is an important monitoring object in the process of landslide deformation, and deep displacement monitoring, as one of the important links of displacement monitoring, has good consistency and directness in response to the sliding displacement of the sliding surface, and plays an irreplaceable role in determining the position of the sliding surface, sensing the creeping process of the sliding body, evaluating its stability, and realizing landslide warning. The current commonly used landslide deep deformation monitoring methods have their own advantages and disadvantages: optical fiber sensing technology is widely used in current test applications, but it has some outstanding problems such as poor anti-interference performance and small measurement range. Coaxial cable time domain reflection technology (TDR) is flexible in layout, has a large monitoring range, and can be remotely monitored in real time, but it cannot determine the displacement and moving direction of the slope, and is not suitable for landslide monitoring with no shear effect and large slope displacement. The tensioned wire displacement meter has a wide range of applications due to its large monitoring range and low cost, but the monitoring accuracy is greatly affected by the material of the tensioned wire and it is not resistant to water pressure. Borehole inclinometry is a widely recognized and most widely used landslide deformation monitoring method among existing measurement methods due to its high precision, easy remote measurement, and less interference from external factors, but it has limited measurement range, high cost, and the inclinometer tube is easily cut off when the deep deformation is large, resulting in failure to measure.

[0004] In addition, Three Gorges University has proposed several magnetic positioning underground displacement monitoring methods based on deep monitoring holes, but this method lacks consideration of the impact of the deformed sliding body on the power supply environment of the magnetic detector, and the specific layout method of the magnetic positioning device is not described. Based on this, China University of Geosciences (Wuhan) proposed a prefabricated magnetic field layout system and a matching landslide deformation state response method (CN110736422B), and further proposed an improved scheme of layout machinery optimization and establishment of a rapid layout system; this method has high precision, is convenient to lay out, and can effectively solve the inclinometer-soil coupling deformation problem; but the volume of the permanent magnet laid out in this method is too small, and when the soil deforms greatly, the magnet is too far away from the detector, which affects the effect of sliding body displacement monitoring. SUMMARY

[0005] The application aims to provide a strong effect pre-prepared magnetic field layout system and layout method to solve the technical problems of weak pre-prepared magnetic field, poor monitoring stability and precision caused by small magnet layout in the prior art.

[0006] To achieve the above-mentioned purpose, the first aspect of the application provides a strong effect pre-prepared magnetic field layout system, comprising a power supply arranged outside a drill hole, a control system, a traction mechanism and a layout probe arranged in the drill hole.

[0007] The layout probe comprises a shell and a conveying device, a rotating device and a telescopic top extension device fixedly connected in the shell.

[0008] The shell is provided with a layout work window.

[0009] The conveying device comprises a servo motor, a synchronous pulley, a pulley shaft, a pulley bearing, a synchronous belt and a plurality of insulating fixing grooves fixed on the synchronous belt, the insulating fixing grooves being used for fixing magnetic spheres; the synchronous belt is arranged along the height direction of the layout probe.

[0010] The rotating device comprises a motor, a main shaft and a base fixedly connected to the main shaft, and the main shaft is arranged horizontally.

[0011] The top extension device is fixedly connected to the base, and the top extension device comprises a grabbing groove and an electromagnetic sheet arranged in the grabbing groove, and the grabbing groove is used for fixing magnetic spheres.

[0012] In the first state, the grooves of the insulating fixing grooves and the grabbing groove are opposite, and the central axes of the insulating fixing grooves and the grabbing groove in the vertical direction are on the same vertical line; in the second state, the groove of the grabbing groove faces the layout work window.

[0013] The power supply is used for powering the whole system, the traction mechanism is connected with the layout probe; the control system is used for controlling the traction mechanism, the servo motor, the motor, the top extension device and the electromagnetic sheet.

[0014] Further, a hydraulic machine is further included, the top extension device further comprises a lifting connecting rod and a hydraulic rod, the hydraulic machine and the hydraulic rod are connected through a hydraulic oil pipe, and the hydraulic rod drives the lifting connecting rod to perform lifting action.

[0015] Further, the hydraulic oil pipe, the power supply cable of the power supply and the control cable of the control system are integrated into a bundled cable, the traction mechanism is connected with the layout probe through the bundled cable, and the shell is provided with a bundled cable opening.

[0016] Further, the shell is arranged in a sandwich manner, and cable holes are formed in the side wall of the shell for the control cable, the power cable and the hydraulic oil pipe to pass through, and the power cable, the control cable and the hydraulic oil pipe are combined into the bundled cable in the sandwich of the shell.

[0017] Further, the shell is further provided with a counterweight.

[0018] Further, the main shaft is provided with a key groove for connecting the base.

[0019] Further, the conveying devices are symmetrically arranged in the shell, and two of the conveying devices are arranged in an up-down manner; the rotating devices are arranged between the two conveying devices; the base of each rotating device is fixedly connected with one top extension device; and the layout work windows are symmetrically arranged in two.

[0020] Further, the two layout work windows are arranged in a staggered manner in the vertical direction.

[0021] Further, the electromagnetic sheet is arranged at the bottom center of the grabbing groove.

[0022] In a second aspect, the application provides a layout method of a strong effect pre-prepared magnetic field layout system, comprising the following steps:

[0023] S1, the control system controls the traction mechanism to lower the layout probe to the sliding belt position at the bottom of the drill hole, and records the lowering depth of the layout probe, which is used to determine the depth of the sliding belt;

[0024] S2, the control system controls two servo motors, and the two servo motors respectively drive two groups of conveying devices to operate, the conveying devices store magnetic spheres, and the two groups of conveying devices respectively convey two magnetic spheres above and below the top extension device; the control system controls the hydraulic machine, the hydraulic machine respectively drives two groups of hydraulic rods, and the two groups of hydraulic rods drive the top extension device to elongate; the control system energizes two electromagnetic sheets at both ends of the top extension device, the electromagnetic sheets attract the two magnetic spheres in a magnetic adsorption manner after being energized, and then the top extension device shortens; the control system controls the motor, the motor drives the rotating device to rotate by 90° in the direction of the layout work window, so that the top extension device and the magnetic spheres are aligned in the horizontal direction of the opening of the layout work window; the control system controls the hydraulic machine, the hydraulic machine respectively drives two groups of the top extension device to completely elongate, and the two magnetic spheres are symmetrically pressed into the drill hole wall to obtain a monitoring point.

[0025] S3, controlling two hydraulic machines by the control system, the hydraulic machines respectively driving two groups of the top stretching devices to shorten to the initial state; controlling the motor by the control system, the motor driving the rotating device to rotate 90° towards the conveying device, so that the top stretching device is in the vertical direction aligned with the conveying device; at this time, the top stretching device and the rotating device are both restored to the initial state;

[0026] S4, controlling the traction mechanism by the control system, the traction mechanism lifting the layout probe to a preset height, and repeating steps S2 and S3;

[0027] S5, repeating step S4 until all the pre-laid monitoring points are obtained, and the positions of all the magnetic spheres are numbered;

[0028] S6, installing a inclinometer tube in the borehole, backfilling materials similar to the surrounding rock and soil of the borehole around the inclinometer tube, and lowering the sliding magnetic detection probe in the inclinometer tube, the sliding magnetic detection probe being connected to a magnetic detection data processor outside the borehole through a communication cable, the sliding magnetic detection probe detecting the magnetic signal of the magnetic sphere at the monitoring point, and the magnetic detection data processor calculating the spatial position of each magnetic sphere through a magnetic positioning algorithm, thereby determining the current spatial displacement state of the monitoring point represented by the magnetic sphere.

[0029] Compared with the prior art, the application has the following technical effects:

[0030] The strong effect pre-prepared magnetic field layout system can be used to layout a larger volume of magnetic spheres, the volume of the magnetic spheres being about 17 times the volume of the conventional small spheres, which can effectively solve the problems of small pre-prepared magnetic field effect, weak monitoring signal and poor detection stability in the previous landslide pre-prepared magnetic field deformation state response method, and can meet the application scenarios of deep deformation and large displacement of landslides. In addition, the synchronous belt conveying device is used in the layout probe to convey the magnetic spheres in the form of meshing belt transmission, the conveying device has accurate transmission ratio, no sliding, compact structure, good wear resistance and adaptability to harsh working conditions, and can accurately convey the magnetic spheres to the specified position, ensuring the feasibility of the layout system.

[0031] The layout method of the strong effect pre-prepared magnetic field layout system uses the control system outside the borehole for operation throughout the process, and can realize automatic layout after a preset program, saving time and labor, being more accurate and beneficial to popularization. BRIEF DESCRIPTION OF DRAWINGS

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the overall structure of a strong-effect pre-fabricated magnetic field deployment system provided in this application embodiment;

[0034] Figure 2 for Figure 1 A schematic diagram of the internal structure of the probes deployed in the middle;

[0035] Figure 3 for Figure 1 A schematic diagram of the internal structure of the probe deployed in the middle;

[0036] Figure 4 for Figure 2 , Figure 3 A schematic diagram of the conveyor mechanism;

[0037] Figure 5 for Figure 2 , Figure 3 Schematic diagram of the central extension device;

[0038] Figure 6 for Figure 2 , Figure 3 Schematic diagram of the rotating device in the middle;

[0039] Figure 7 A schematic diagram illustrating the principle of monitoring the sliding strip state under a large magnet and a strong pre-fabricated magnetic field, as provided in the embodiments of this application.

[0040] Figure 8 A flowchart illustrating a method for deploying a strong-effect pre-fabricated magnetic field deployment system, as provided in this application embodiment.

[0041] The following are the labeling elements in the figure:

[0042] 1-power supply, 2-towing mechanism, 3-hydraulic machine, 4-control system, 5-power cable, 6-control cable, 7-hydraulic oil pipe, 8-cable, 9-laying probe, 10-counterweight, 11-housing, 12-conveying device, 13-rotating device, 14-overshooting device, 15-synchronous pulley, 16-pulley shaft, 17-synchronous belt, 18-pulley bearing, 19-servo motor, 20-insulating fixing groove, 21-magnetic sphere, 22-grabbing groove, 23-electromagnetic sheet, 24-lifting connecting rod, 25-hydraulic rod, 26-motor, 27-main rotating shaft, 28-base, 29-key groove, 30-laying work window, 31-cable opening, 32-drilling hole, 33-inclinometer, 34-bedrock, 35-slip band, 36-slip body, 37-magnetic detection data processor, 38-communication cable, 39-sliding magnetic detection probe. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second", "third", "fourth", "fifth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0047] Please refer to Figures 1-5 , now a strong effect prefabricated magnetic field laying system provided by the embodiments of the present application will be described.

[0048] In one embodiment of the present application, the strong effect pre-prepared magnetic field laying system of the present application comprises a power supply 1, a traction mechanism 2, a hydraulic machine 3, a control system 4 arranged outside the borehole 32, and a laying probe 9 which can be placed in the borehole 32, the traction mechanism 2 is connected with the laying probe 9 to pull the laying probe 9 to move up and down.

[0049] The power supply 1 is connected with all the power consuming devices through the power cable 5 to supply power to the whole laying system, including the traction mechanism 2, the hydraulic machine 3 and the control system 4 outside the borehole 32, and also including the servo motor 19, the electromagnetic sheet 23 and the motor 26 in the laying probe 9.

[0050] The control system 4 is connected with all the devices which need to be controlled through the control cable 6, including the traction mechanism 2 and the hydraulic machine 3 outside the borehole 32, and also including the servo motor 19, the electromagnetic sheet 23 and the motor 26 in the laying probe 9.

[0051] Please refer to Figure 1 , the hydraulic machine 3 is provided with a hydraulic oil tank, and the control system 4 can control the hydraulic oil pump in the hydraulic machine to pump in or pump out the hydraulic oil pipe 7. The traction mechanism 2 is a winch, and the power cable 5, the control cable 6 and the hydraulic oil pipe 7 are incorporated into the bundled cable 8 which can be regarded as the traction rope of the traction mechanism 2, and the bundled cable 8 is connected with the laying probe 9.

[0052] Please refer to Figure 2 and Figure 3 , the laying probe 9 comprises a shell 11, a conveying device 12 and a rotating device 13 fixedly connected to the inner wall of the shell 11, and the rotating device 13 is connected with the telescopic top extension device 14. The laying probe 9 can also be configured with a counterweight 10 to facilitate the laying probe 9 to be placed at a predetermined depth more conveniently. The conveying device 12 and the top extension device 14 can be symmetrically arranged in two groups, the two groups of conveying devices 12 are arranged in an up-down manner in the shell 11, and the rotating device 13 is arranged between the two groups of conveying devices 12.

[0053] The shell 11 is arranged in a sandwich manner, and the power cable 5, the control cable 6 and the hydraulic oil pipe 7 are arranged in the sandwich. The shell 11 is provided with cable holes for the power cable 5, the control cable 6 and the hydraulic oil pipe 7 to pass through; the power cable 5, the control cable 6 and the hydraulic oil pipe 7 are combined into the bundled cable 8 in the gap of the shell, and the bundled cable 8 extends out through the bundled cable opening 31 at the top of the shell 11. The middle side wall of the shell 11 is provided with two horizontally-positioned symmetrical layout work windows 30, and the two layout work windows 30 can be arranged in a staggered manner in the longitudinal direction, i.e., one is arranged above the middle part and the other is arranged below the middle part, so as to prevent the magnetic spheres 21 from contacting the shell 11 during the layout. Two sets of conveying devices 12 are arranged at the upper and lower ends of the layout work windows 30 respectively, and the rotating device 13 is fixed to the middle part of the layout probe 9. Two sets of top-stretching devices 14 are fixed to the upper and lower ends of the rotating device 13 respectively.

[0054] Please refer to Figure 4 The conveying device 12 is used for conveying the magnetic spheres 21 to the positions where the top-stretching devices 14 can grab. The magnetic spheres 21 are permanent magnets. Each set of conveying device 12 is composed of a servo motor 19, two sets of synchronous pulleys 15, two sets of pulley shafts 16, two sets of pulley bearings 18, a synchronous belt 17 and a plurality of insulating fixing grooves 20. The synchronous belt 17 is arranged along the height direction of the layout probe 9. The servo motor 19 is connected with the power supply 1 and the control system 2 through the bundled cable 8. The servo motor 19 drives the pulley shafts 16 and the pulley bearings 18 to rotate, so as to drive the synchronous pulleys 15 to rotate, and further drive the synchronous belt 17 to rotate. The insulating fixing groove 20 is used for fixing the magnetic spheres 21, and is made of insulating plastic and fixed on the synchronous belt 17 by using rubber glue, so as to avoid the mutual adsorption between the magnetic spheres 21. Meanwhile, the insulating fixing groove 20 is in the shape of a prismatic platform with a quarter-sphere arc concave, and can partially wrap the magnetic spheres 21, so as to prevent the magnetic spheres 21 from separating from the synchronous belt 17.

[0055] In the embodiment, the conveying device 12 conveys the insulating fixing grooves 20 fixed on the synchronous belt 17 in the meshing type belt transmission mode. The transmission ratio of the conveying mode is accurate, there is no sliding, the structure is compact, and the conveying process of the magnetic spheres 21 can be accurately controlled. Ten insulating fixing grooves 20, i.e., ten magnetic spheres 21, can be placed on each set of conveying device 12. When the synchronous pulley 15 rotates by 180°, the moving distance of the synchronous belt is exactly the width of the insulating fixing groove 20, i.e., exactly equal to the distance between the centers of the magnetic spheres 21. Therefore, the conveying mode can ensure that the magnetic spheres 21 can be accurately conveyed to the positions directly above and below the two top-stretching devices 14.

[0056] Please refer to Figure 5Each of the top stretching devices 14 is composed of a grabbing groove 22, an electromagnetic sheet 23, a lifting connecting rod 24 and a hydraulic rod 25. The grabbing groove 22 is located at the end of the top stretching device 14, and is in the shape of a square body with a quarter of a spherical arc concave, made of insulating plastic, and is used for fixing the magnetic sphere 21. The electromagnetic sheet 23 is installed at the bottom center of the grabbing groove 22, and is electrified when the magnetic sphere 21 moves above and below the top stretching device 14, and the electromagnetic sheet 23 will be magnetized and adsorb the magnetic sphere 21 after being electrified. The lifting connecting rod 24 is composed of several rigid thin rods and bolt links, and is connected with the hydraulic rod 25, and can be telescopic in the form of shears. The hydraulic rod 25 is connected with the hydraulic machine 3 through the hydraulic oil pipe 7, and the control system 4 controls the hydraulic oil pump in the hydraulic machine 3 to pump in or pump out, so as to control the extension or shortening of the hydraulic rod 25, so as to drive the lifting connecting rod 24 to realize the telescopic lifting action.

[0057] Please refer to Figure 6 The rotating device 13 is fixed to the side wall of the shell 11 and is located at the middle position of the shell 11. The rotating device 13 is composed of a motor 26, a main shaft 27 and a base 28. The main shaft 27 is horizontally arranged, and the main shaft 27 is provided with a key groove 29 for connecting the base 28. The motor 26 is connected with the power supply 1 through the power cable 5, and is also connected with the control system 4 through the control cable 6. Under the instruction of the control system 4, the motor 26 can drive the main shaft 27 to rotate by 90° around the main shaft 27 along the direction in which the working window 30 is arranged, so as to drive the base 28 and the key groove 29 to rotate in the same way.

[0058] In the embodiment of the application, the two top stretching devices 14 are respectively fixed at the upper and lower ends of the base 28 in the rotating device 13, and are in a semi-retracted state under normal circumstances. After each time of longitudinally grabbing the magnetic sphere 21, the top stretching device 14 will be shortened. After the top stretching device 14 is shortened, the rotating device 13 rotates by 90° towards the direction in which the working window 30 is arranged, so that the top stretching device 14 is in a horizontal direction after rotation. At this time, the magnetic sphere 21 is aligned with the working window 30, and the two top stretching devices 14 are elongated in the horizontal direction, and the two magnetic spheres 21 are symmetrically arranged into the soil body respectively. The top stretching device 14 realizes the telescopic action in the form of hydraulic drive, that is, by arranging the hydraulic machine 3, the lifting connecting rod 24 and the hydraulic rod 25. The hydraulic machine 3 and the hydraulic rod 25 are connected through the hydraulic oil pipe 7, and the hydraulic rod 25 drives the lifting connecting rod 24 to perform the lifting action.

[0059] It should be noted that the top stretching device 14 of the embodiment of the application realizes the telescopic action in the form of hydraulic drive, but is not limited thereto. For example, the top stretching device 14 can also realize the telescopic action through other mechanical driving modes.

[0060] When the magnetic balls 21 on the two sets of conveying devices 12 move to the top and below the top extension device 14 respectively, that is, in the first state, the openings of the insulation fixing groove 20 and the grabbing groove 22 are opposite, and the vertical center axes of the insulation fixing groove 20 and the grabbing groove 22 are on the same vertical line. At this time, the electromagnetic sheet 23 is powered on, and under the action of magnetic attraction, the magnetic ball 21 located directly above the top extension device 14 will be attracted into the grabbing groove 22 by overcoming the restraint of the insulation fixing groove 20 under the joint action of its own gravity and magnetic attraction; at the same time, the magnetic ball 21 located directly below the top extension device 14 will also be attracted into the grabbing groove 22 by overcoming the restraint of the insulation fixing groove 20 under the action of magnetic attraction and its own gravity.

[0061] After the magnetic ball 21 is attracted into the grabbing groove 22, the rotating device 13 is controlled to rotate 90°, so that the opening of the grabbing groove 22 faces the layout working window 30, that is, in the second state, in preparation for laying the magnetic ball 21 through the layout working window 30 into the soil around the drill hole 32.

[0062] After the magnetic ball 21 extends into the soil around the drill hole 32 through the layout working window 30, the electromagnetic sheet 23 is powered off, and the magnetic ball 21 will automatically fall into the soil around the drill hole 32 by overcoming the restraint of the grabbing groove 22 under the action of its own gravity.

[0063] The strong effect pre-prepared magnetic field layout system of the embodiment can be used to lay a larger volume of magnetic balls 21, the volume of which is about 17 times that of a traditional small ball, which can effectively solve the problems of smaller pre-prepared magnetic field effect, weaker monitoring signal and poorer detection stability in the previous landslide pre-prepared magnetic field deformation state response method, and can meet the application scenarios of large displacement of deep landslide deformation. In addition, the synchronous belt conveying device 12 is used in the layout probe 9 of the embodiment to convey the magnetic balls 21 in a meshing type belt drive manner. The conveying device 12 has accurate transmission ratio, no sliding, compact structure, good wear resistance and adaptability to harsh working conditions, and can accurately convey the magnetic balls 21 to the designated position, thereby ensuring the feasibility of the layout system.

[0064] In addition, the embodiment also provides a layout method of the strong effect pre-prepared magnetic field layout system, please refer to Figure 7 and Figure 8 , which uses the strong effect pre-prepared magnetic field layout system described above, and includes the following specific steps:

[0065] S1, for the landslide section to be detected, drill from the ground to the stable bottom layer (bedrock 34), control the power supply 1 through the power supply and control system 4, use the traction mechanism 2 to lower the layout probe 9 to the sliding surface position at the bottom of the drill hole 32, and record the lowering depth of the layout probe 9 at this time to determine the position of the sliding surface.

[0066] S2, control the two servo motors 19 by the control system 4, the servo motors 19 drive two sets of conveying devices 12 to operate respectively, two sets of conveying devices 12 respectively convey two magnetic spheres 21 to the top of the top extension device 14 and the bottom of the top extension device 14; control the hydraulic machine 3 by the control system 4, the hydraulic machine 3 drives two sets of hydraulic rods 25 respectively, two sets of hydraulic rods 25 drive the top extension device 14 to slightly extend; control the two electromagnetic sheets 23 at both ends of the top extension device 14 to be powered on by the control system 4 and the power supply 1, the electromagnetic sheets 23 are attracted to the two conveyed magnetic spheres 21 after being powered on, and then the top extension device 14 is completely shortened; control the motor 26 by the control system 4, the motor 26 drives the rotating device 13 to rotate 90° towards the layout work window 30 direction, so that the top extension device 14 and the magnetic sphere 21 are aligned in the horizontal direction of the layout work window 30; control the hydraulic machine 3 by the control system 4, the hydraulic machine 3 drives two sets of top extension devices 14 to completely extend, and two magnetic spheres 21 are symmetrically pressed into the soil around the drill hole 32 to obtain a monitoring point.

[0067] S3, control the hydraulic machine 3 by the control system 4, the hydraulic machine 3 drives two sets of top extension devices 14 to shorten to the initial state; control the motor 26 by the control system 4, the motor 26 drives the rotating device 13 to rotate 90° towards the conveying mechanism 12 direction, so that the top extension device 14 is aligned in the vertical direction of the conveying mechanism 12; at this time, the top extension device 14 and the rotating device 13 are restored to the initial state.

[0068] S4, control the traction mechanism 2 by the control system 4, so that the traction mechanism 2 lifts the layout probe 9 to a preset height, and repeats steps S2 and S3;

[0069] S5, repeat step S4 until all the pre-laid monitoring points are obtained, and the positions of all the magnetic spheres 21 are numbered; when the magnetic spheres 21 on the conveying device 12 are used up, record the current lowering depth, lift the layout probe 9, supplement the magnetic spheres 21 on the conveying device 12, and lower the layout probe 9 to the recorded depth.

[0070] S6, install a inclinometer tube 33 in the drill hole 32, backfill materials similar to the surrounding rock and soil around the inclinometer tube 33, lower the sliding magnetic detection probe 39 in the inclinometer tube 33, the sliding magnetic detection probe 39 is connected to the magnetic detection data processor 37 outside the drill hole 32 through the communication cable 38, and the magnetic detection data processor 37 can calculate the spatial position of each magnetic sphere 21 through the magnetic positioning algorithm after the sliding magnetic detection probe 39 detects the magnetic signal of the magnetic sphere 21 at the monitoring point, so as to determine the current spatial state of the monitoring point represented by the magnetic sphere 21.

[0071] The laying method of the embodiment of the application can place a plurality of large-volume permanent magnets (magnetic spheres 21) around the soil in the borehole 32, and the sliding magnetic detection probe 39 can be placed in the inclinometer casing 33, so that the sliding magnetic detection probe 39 can smoothly detect the spatial position of the magnetic spheres 21 moving with the sliding body 36 and the sliding belt 35, so as to monitor the spatial displacement state of the monitoring point corresponding to each magnetic sphere 21.

[0072] Compared with the traditional sliding body preformed magnetic field, the strong effect preformed magnetic field of the embodiment of the application lays a larger-volume permanent magnet (magnetic sphere 21), which has a volume about 17 times that of a traditional small ball, and can effectively solve the problems of small preformed magnetic field effect and poor monitoring stability in the previous sliding body preformed magnetic field deformation state response method; and can also solve the problem that when the sliding body 36 and the sliding belt 35 produce large deformation, the spatial position of the magnetic sphere 21 is too far from the inclinometer casing 33, the monitoring signal is weak and difficult to be detected. In addition, the conveying device 12 of the embodiment of the application conveys the magnetic sphere 21 in a meshing type belt transmission manner, which has the advantages of accurate transmission ratio, no sliding, compact structure, good wear resistance and adaptation to harsh working conditions, and can accurately convey the magnetic sphere 21 to the designated position, ensuring the feasibility of the laying system.

[0073] The laying system and the laying method provided by the embodiment of the application are operated by the control system 4 outside the borehole 32, and can realize automatic laying after a preset program, which is time-saving and labor-saving, has higher precision, and is beneficial to popularization.

[0074] The above embodiments only express several implementation manners of the application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are all within the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A strong-effect pre-fabricated magnetic field deployment system, characterized in that, This includes a power supply, control system, traction mechanism located outside the borehole, and probes placed inside the borehole. The deployment probe includes a housing and a conveying device, a rotating device, and a retractable extension device fixedly connected within the housing. The housing is provided with a working window; The conveying device includes a servo motor, a synchronous pulley, a pulley shaft, a pulley bearing, a synchronous belt, and multiple insulating fixing slots fixed on the synchronous belt. The insulating fixing slots are used to fix the magnetic sphere. The synchronous belt is arranged along the height direction of the deployed probe. The rotating device includes a motor, a main shaft, and a base fixedly connected to the main shaft, wherein the main shaft is horizontally arranged. The top extension device is fixedly connected to the base. The top extension device includes a gripping groove and an electromagnetic plate disposed in the gripping groove. The gripping groove is used to fix the magnetic ball. In the first state, the openings of the insulating fixing groove and the gripping groove are opposite each other, and the central axes of the insulating fixing groove and the gripping groove are on the same vertical line; in the second state, the opening of the gripping groove is directly opposite the deployment working window. The power supply is used to power the entire system, and the traction mechanism is connected to the deployment probe; the control system is used to control the traction mechanism, the servo motor, the motor, the jacking device, and the electromagnetic plate; It also includes a hydraulic press, and the extension device further includes a lifting link and a hydraulic rod. The hydraulic press and the hydraulic rod are connected by a hydraulic oil pipe, and the hydraulic rod drives the lifting link to perform lifting and lowering actions. Two conveying devices are symmetrically arranged inside the housing, with the two conveying devices positioned vertically; a rotating device is located between the two conveying devices; a top extension device is fixedly connected to the base of each rotating device; two working windows are symmetrically arranged. The two deployment windows are staggered in the vertical direction; The electromagnetic plate is located at the bottom center of the gripping slot.

2. The strong-effect pre-fabricated magnetic field deployment system as described in claim 1, characterized in that, The hydraulic oil pipe, the power cable of the power source, and the control cable of the control system are all bundled together into a cluster cable. The traction mechanism is connected to the deployment probe through the cluster cable, and the housing has a cluster cable opening.

3. The strong-effect pre-fabricated magnetic field deployment system as described in claim 2, characterized in that, The housing is sandwiched, and the side wall of the housing has cable holes for the control cable, the power cable and the hydraulic oil pipe to pass through. The power cable, the control cable and the hydraulic oil pipe are combined into a bundled cable in the sandwich of the housing.

4. The strong-effect pre-fabricated magnetic field deployment system as described in claim 1, characterized in that, The shell is also equipped with a counterweight.

5. The strong-effect pre-fabricated magnetic field deployment system as described in claim 1, characterized in that, The main shaft is provided with a keyway for connecting to the base.

6. A method for deploying a strong-effect pre-fabricated magnetic field deployment system as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Control the traction mechanism through the control system to lower the deployment probe to the sliding band position at the bottom of the borehole, and record the lowering depth of the deployment probe to determine the depth of the sliding band; S2. The control system controls two servo motors, which in turn drive two sets of conveying devices. Each conveying device stores magnetic spheres, and the two sets of conveying devices respectively transport two magnetic spheres to the top and bottom of the extension device. The control system also controls a hydraulic press, which drives two sets of hydraulic rods, which in turn extend the extension device. The control system energizes two electromagnetic plates at both ends of the extension device, which, after being energized and magnetized, attract and grasp the two magnetic spheres, causing the extension device to shorten. The control system then controls a motor, which drives a rotating device to rotate 90° towards the working window, aligning the extension device and the magnetic spheres horizontally with the opening of the working window. Finally, the control system controls the hydraulic press, which drives both sets of extension devices to fully extend, symmetrically pressing the two magnetic spheres into the borehole wall to obtain monitoring points. S3. The hydraulic press is controlled by the control system, and the hydraulic press drives the two sets of the extension devices to shorten to their initial state; the motor is controlled by the control system, and the motor drives the rotating device to rotate 90° toward the conveying device, so that the extension device is aligned with the vertical direction of the conveying device; at this time, both the extension device and the rotating device are restored to their initial state. S4. Control the traction mechanism through the control system, and the traction mechanism lifts the deployment probe to a preset height, and repeats steps S2 and S3; S5. Repeat step S4 until all pre-deployed monitoring points are obtained, and the positions of all magnetic spheres are numbered. S6. An inclinometer tube is installed inside the borehole, and a material similar to the surrounding soil and rock is backfilled around the inclinometer tube. A sliding magnetic probe is placed inside the inclinometer tube. The sliding magnetic probe is connected to a magnetic data processor outside the borehole via a communication cable. The sliding magnetic probe detects the magnetic signal of the magnetic sphere at the monitoring point. The magnetic data processor calculates the spatial position of each magnetic sphere using a magnetic positioning algorithm, thereby determining the current spatial displacement state of the monitoring point it represents.

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