A monitoring device suitable for karst collapse

Abstract

The present invention relates to the technical field of karst collapse monitoring, and discloses a monitoring device suitable for karst collapse, including a server and a wireless network transmission unit, the input end of the wireless network transmission unit is connected to the output end of several subsystems, the output end of the wireless network transmission unit is connected to the input end of the server, and the subsystem includes a borehole opened between the soil layer and the bedrock, and a casing is arranged inside the borehole, and the top of the casing is fixedly connected with an embedded support seat. The monitoring device suitable for karst collapse is provided with several settlement monitoring parts between the sleeve and the fixed sleeve, so as to monitor the settlement and landslide of the soil layer or bedrock in real time, effectively combine settlement monitoring and landslide monitoring, further improve the comprehensiveness of karst collapse monitoring, and solve the problem that the collapse monitoring equipment in the prior art can usually only monitor the settlement state of the soil layer or bedrock.

Description

Technical Field

[0001] The invention relates to the technical field of karst collapse monitoring, and in particular to a monitoring device suitable for karst collapse. Background Art

[0002] Karst ground collapse is a common dynamic geological phenomenon in karst areas, in which caves, cavities in molten rocks or soil holes in overlying soil layers cause their roofs to become unstable and damaged and collapse due to natural or human factors. The Chinese invention patent with publication number CN115682888B discloses a karst collapse monitoring device, which monitors cave collapse by setting a lifting monitoring device in the lower shell. It can be used for monitoring in some karst caves with harsh environments, and can issue an early warning at the first time of collapse, effectively reducing safety risks; the Chinese invention patent with publication number CN116642455A discloses an automatic monitoring system and method suitable for karst collapse, which greatly saves construction costs and scientific rationality of data by installing groundwater monitoring and soil layer monitoring in the same hole; when groundwater changes exceed a threshold, the monitoring frequency of monitoring parameters such as settlement can be adjusted in an intensified manner, and timely early warning and analysis of correlation factors between parameters can be performed, thereby improving the stability and accuracy of data monitoring, and has good application prospects.

[0003] In the related art, the existing karst collapse monitoring device generally monitors the collapse by collecting data on the settlement of soil layers or bedrock when monitoring the karst collapse area. However, the monitoring method of this type of monitoring equipment has certain defects in the monitoring process. For example, when collapsing, the soil layer is not only easy to sink, but also forms a landslide movement. The above-mentioned monitoring equipment cannot simultaneously monitor the collapse of the landslide state during the settlement monitoring process. The monitoring method is too single, which seriously affects the monitoring effect of karst collapse. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a monitoring device suitable for karst collapse, in which a plurality of settlement monitoring components are arranged between the sleeve and the fixed sleeve, so as to facilitate real-time monitoring of the settlement and landslide conditions of the soil layer or bedrock, effectively combining settlement monitoring and landslide monitoring, further improving the comprehensiveness of karst collapse monitoring, and solving the problem that the collapse monitoring equipment in the prior art can usually only monitor the settlement state of the soil layer or bedrock and the monitoring method is too single.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a monitoring device suitable for karst collapse, comprising a server and a wireless network transmission unit, wherein the input end of the wireless network transmission unit is connected to the output end of a plurality of subsystems, and the output end of the wireless network transmission unit is connected to the input end of the server, wherein the subsystem comprises a borehole opened between the soil layer and the bedrock, and a casing is arranged inside the borehole, and an embedded support seat is fixedly connected to the top of the casing, and a protective cover is fixedly connected to the inside of the support seat, and a cover plate is detachably installed on the top of the protective cover, and an automatic collection and transmission system is arranged inside the protective cover, and concrete filling material is filled between the support seat and the protective cover, and a plurality of collapse monitoring components and water level monitoring components are arranged on the casing;

[0008] The collapse monitoring assembly includes a sleeve detachably mounted on the casing, the interior of the sleeve is fixedly connected to a fixed sleeve via a bracket, a plurality of water inlets are opened on the outer surface of the sleeve, and a water filter membrane is fixedly connected to the interior of the plurality of water inlets, and a plurality of settlement monitoring components are arranged between the sleeve and the fixed sleeve.

[0009] Preferably, the settlement monitoring component includes a spherical groove opened on the outer surface of the sleeve, and the interior of the spherical groove is movably connected to a spherical block, and the interior of the spherical block is fixedly connected to a balance rod, and the outer surface of one end of the balance rod is fixedly connected to four force plates.

[0010] Preferably, the other end of the balance rod is fixedly connected to a trigger rod, one end of the trigger rod is fixedly connected to a vertical rope, one end of the rope is fixedly connected to a sliding frame, and the sliding frame is slidably connected to the outer surface of the fixed sleeve, and a trigger member for detecting the upward driven sliding frame is provided at the bottom of the fixed sleeve.

[0011] Preferably, the trigger member includes a control box fixed to the bottom of the fixed sleeve, a lifting plate is slidably connected to one side of the inner wall of the control box, and the top of the lifting plate is respectively fixedly connected to a connecting rod, a reset spring, and a first touch switch, the top of the connecting rod extends to the top of the control box, the top of the connecting rod is fixed to the bottom of the sliding frame, the top of the reset spring is fixed to the top of the inner wall of the control box, and a data generator is installed at the bottom of the inner wall of the control box.

[0012] Preferably, the sleeve includes a plurality of branch pipes, and two adjacent branch pipes are detachably fixed by a collapse monitoring assembly. The top and bottom of the sleeve are provided with annular grooves for inserting the branch pipes, and sealing sleeves are fixedly connected on both sides of the inner walls of the two annular grooves. Two groups of T-shaped pins are slidably connected inside the sleeve, and one ends of the two groups of T-shaped pins extend to the inside of the two annular grooves respectively, and one end of the two adjacent branch pipes is provided with a clamping hole for inserting the T-shaped pins.

[0013] Preferably, the two groups of T-shaped latches are fixedly connected to the fixing sleeve via V-shaped metal spring pieces, and the two groups of T-shaped latches are fixedly connected with L-shaped toggle blocks.

[0014] Preferably, the water level monitoring assembly includes a ring fixed inside the protective cover, a scale rod is arranged inside the ring, the bottom end of the scale rod extends to the inside of the casing, a hollow float is fixedly connected to the bottom end of the scale rod, and the top of the float is arranged in a cone shape, and the top of the scale rod extends to the top of the cover plate.

[0015] Preferably, a camera for photographing the scale lines on the outer surface of the scale bar is fixedly connected to the inside of the protective cover, and a control component is arranged inside the protective cover;

[0016] The control component includes a plurality of control ports opened inside the scale mark rod and a U-shaped frame fixed to the bottom of the inner wall of the protective cover. The interior of the U-shaped frame is rotatably connected to an inclined T-shaped control block via a rotating shaft, and one end of the T-shaped control block is inserted into the interior of one of the control ports. Two torsion springs are provided at the rotating end of the T-shaped control block. The top of the U-shaped frame is fixedly connected to a second touch switch via an L-shaped rod.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a monitoring device suitable for karst collapse, which has the following beneficial effects:

[0019] 1. The present invention can implement the water level conditions of the karst collapse area through the setting of the water level monitoring component, so as to understand the karst collapse data according to the karst collapse water level conditions, and further increase the diversity of its karst collapse monitoring; a plurality of settlement monitoring components are arranged between the sleeve and the fixed sleeve, so as to monitor the settlement and landslide conditions of the soil layer or bedrock in real time, effectively combine the settlement monitoring and landslide monitoring, further improve the comprehensiveness of karst collapse monitoring, and solve the problem that the collapse monitoring equipment in the prior art can usually only monitor the settlement state of the soil layer or bedrock, and the monitoring method is too single.

[0020] 2. The present invention provides two annular grooves for inserting two adjacent branch pipes in the casing, provides two groups of sealing sleeves for improving the sealing performance of the installation, and provides two groups of T-shaped pins for inserting into the clamping holes at corresponding positions, thereby forming a clamping installation of the sleeve and the two casings. The present invention has good assembly and disassembly functions, which is not only convenient for the staff to carry and transport the monitoring equipment by classification and facilitates the staff to dismantle and recycle the collapse monitoring components in the later stage, thereby improving the utilization rate of the collapse monitoring components, but also convenient for the staff to control the collapse monitoring components at different positions and in different quantities according to the actual situation of the karst collapse monitoring area, thereby improving the karst collapse monitoring effect.

[0021] 3. The present invention uses a camera in the water level monitoring component to take real-time photos of the scale pole, and uses a control component to drive the camera according to the floating water level. The camera does not need to work in real time. When the water level does not change, the camera can be in standby mode, which solves the problem in the prior art that the camera for water level monitoring is kept in an on state for a long time, which not only consumes a large amount of electricity, but also collects a large amount of unnecessary data, greatly occupying the memory for data storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the principle of the present invention;

[0023] Figure 2 It is a schematic diagram of the installation of the subsystem of the present invention;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the neutron system;

[0025] Figure 4 For the present invention Figure 3 Structural cross-sectional view of

[0026] Figure 5 For the present invention Figure 1 A combined cross-sectional view of the middle casing and the collapse monitoring assembly;

[0027] Figure 6 For the present invention Figure 5 Structural cross-sectional view of

[0028] Figure 7 For the present invention Figure 5 A schematic cross-sectional view of a subsidence monitoring assembly;

[0029] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the medium settlement monitoring component;

[0030] Fig. 9 For the present invention Figure 3A top view of the structure of the middle protective cover;

[0031] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure of the control component.

[0032] In the figure: 1. casing; 2. support base; 3. protective cover; 4. cover plate; 5. automatic collection and transmission system; 6. concrete filling material;

[0033] 7. collapse monitoring assembly; 71. sleeve; 72. fixing sleeve; 73. water filter membrane; 74. annular groove; 75. T-shaped latch; 76. V-shaped metal spring; 77. clamping hole;

[0034] 78. Settlement monitoring component; 781. Ball block; 782. Balance bar; 783. Force plate; 784. Trigger bar; 785. Rope; 786. Sliding frame; 787. Control box; 788. Lifting plate; 789. Connecting rod; 7810. Return spring; 7811. First touch switch;

[0035] 8. Water level monitoring component; 81. Ring; 82. Scale rod; 83. Float; 84. Camera;

[0036] 85. Control component; 851. Control port; 852. U-shaped frame; 853. T-shaped control block; 854. Torsion spring; 855. Second touch switch. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] See attached Figure 1-10 A monitoring device suitable for karst collapse includes a server and a wireless network transmission unit, the input end of the wireless network transmission unit is connected to the output end of several subsystems, the output end of the wireless network transmission unit is connected to the input end of the server, the subsystem includes a borehole opened between the soil layer and the bedrock, and a casing 1 is arranged inside the borehole, the top of the casing 1 is fixedly connected to an embedded support seat 2, the inside of the support seat 2 is fixedly connected to a protective cover 3, the top of the protective cover 3 is detachably installed with a cover plate 4, the inside of the protective cover 3 is arranged with an automatic collection and transmission system 5, and the space between the support seat 2 and the protective cover 3 is filled with concrete filling material 6, and the casing 1 is provided with several collapse monitoring components 7 and water level monitoring components 8;

[0040] The automatic acquisition and transmission system 5 comprises a sealed case, in which a wireless transmission module, an automatic acquisition module and a battery are installed. Through the setting of the water level monitoring component 8, the water level of the karst collapse area can be implemented, so as to understand the data of the karst collapse according to the karst collapse water level, and further increase the diversity of karst collapse monitoring;

[0041] By setting up several collapse monitoring components 7, the collapse conditions at different levels can be monitored in real time, and the spacing between several collapse monitoring components 7 can be set according to the actual soil layer conditions. After the casing 1 is installed, the drilled hole can be backfilled with fine sand. The bottom of the casing 1 is fixedly connected with a connecting plate, which is used to be poured into the hole opened in the bedrock through concrete;

[0042] The collapse monitoring assembly 7 comprises a sleeve 71 detachably mounted on the casing 1, a fixed sleeve 72 is fixedly connected to the inside of the sleeve 71 through a bracket, a plurality of water inlets are provided on the outer surface of the sleeve 71, and a water filter membrane 73 is fixedly connected to the inside of the plurality of water inlets, and a plurality of settlement monitoring components 78 are arranged between the sleeve 71 and the fixed sleeve 72;

[0043] By opening a plurality of water inlets, groundwater in the soil layer can enter the casing 1. The water level in the soil layer can be detected by the water level monitoring component 8, so that the staff can understand the collapse of the area according to the water level. The water filter membrane 73 is set to isolate the soil and prevent the soil from entering the interior of the casing 1, so as to form subsequent monitoring work.

[0044] A plurality of settlement monitoring components 78 are arranged between the sleeve 71 and the fixed sleeve 72 to facilitate real-time monitoring of the settlement and landslide conditions of the soil layer or bedrock, effectively combining settlement monitoring and landslide monitoring, further improving the comprehensiveness of karst collapse monitoring, and solving the problem that the collapse monitoring equipment in the prior art can usually only monitor the settlement status of the soil layer or bedrock.

[0045] See attached Figure 8 The settlement monitoring member 78 includes a spherical groove formed on the outer surface of the sleeve 71, and a spherical block 781 is movably connected to the interior of the spherical groove, and a balancing rod 782 is fixedly connected to the interior of the spherical block 781, and four force-bearing plates 783 are fixedly connected to the outer surface of one end of the balancing rod 782;

[0046] The settlement monitoring member 78 includes a spherical groove formed on the outer surface of the sleeve 71, and a spherical block 781 is movably connected inside the spherical groove, so that the spherical block 781 can roll in different directions inside the spherical groove, so that when the force plates 783 at different positions are squeezed in different directions by the soil layer, the spherical block 781 can be driven to roll inside the spherical groove through the balance bar 782, and the multi-directional monitoring function is realized, which solves the problem that the collapse monitoring equipment in the prior art can usually only monitor the settlement state of the soil layer or bedrock;

[0047] Four force-bearing plates 783 are fixedly connected to the outer surface of the balance rod 782, and multiple groups of collapse monitoring components 7 are arranged on the outer surface of the sleeve 71, so that collapses or landslides in different directions can be monitored, further improving the comprehensiveness of its collapse monitoring.

[0048] See attached Figure 8 The other end of the balance rod 782 is fixedly connected to a trigger rod 784, one end of the trigger rod 784 is fixedly connected to a vertical rope 785, one end of the rope 785 is fixedly connected to a sliding frame 786, and the sliding frame 786 is slidably connected to the outer surface of the fixed sleeve 72, and a trigger member for detecting the upwardly driven sliding frame 786 is provided at the bottom of the fixed sleeve 72;

[0049] When the balance rod 782 encounters the squeezing of the soil layer, the balance rod 782 can move according to the squeezing direction, and then drive the trigger rod 784 to move in the opposite direction with the spherical block 781 as the center, and then drive the vertical downward rope 785 to tilt. Since the rope 785 is of a fixed length, the tilting movement of the rope 785 can drive the sliding frame 786 to move upward, forming the opening of the trigger member, and finally the data transmission of the server is carried out through the automatic collection and transmission system 5.

[0050] See attached Figure 8 The triggering member includes a control box 787 fixed to the bottom of the fixing sleeve 72, a lifting plate 788 is slidably connected to one side of the inner wall of the control box 787, and a connecting rod 789, a return spring 7810, and a first touch switch 7811 are fixedly connected to the top of the lifting plate 788, the top of the connecting rod 789 extends to the top of the control box 787, the top of the connecting rod 789 is fixed to the bottom of the sliding frame 786, the top of the return spring 7810 is fixed to the top of the inner wall of the control box 787, and a data generator is installed at the bottom of the inner wall of the control box 787;

[0051] The sliding frame 786 is connected to the lifting plate 788 by the connecting rod 789, so that when the sliding frame 786 moves upward, the lifting plate 788 can be driven to move upward by the connecting rod 789. When the lifting plate 788 moves upward for a certain distance, its first touch switch 7811 can contact the inner top of the control box 787, forming a trigger for monitoring the settlement of the soil layer or bedrock, and transmitting the collapse data to the automatic collection and transmission system 5 through the data generator, and wireless communication is uniformly performed to the server through the automatic collection and transmission system 5.

[0052] Embodiment 2: Based on embodiment 1, the difference is that;

[0053] See attached Figure 6 and Figure 7 The sleeve 1 includes a plurality of branch pipes, and two adjacent branch pipes are detachably fixed by the collapse monitoring assembly 7. The top and bottom of the sleeve 71 are provided with annular grooves 74 for inserting the branch pipes, and both sides of the inner walls of the two annular grooves 74 are fixedly connected with sealing sleeves. Two groups of T-shaped plugs 75 are slidably connected inside the sleeve 71, and one end of the two groups of T-shaped plugs 75 extends to the inside of the two annular grooves 74 respectively, and one end of the two adjacent branch pipes is provided with a clamping hole 77 for inserting the T-shaped plug 75;

[0054] Two annular grooves 74 are provided for inserting two adjacent branch pipes in the casing 1, two sets of sealing sleeves are provided for improving the sealing of the installation, and two sets of T-shaped pins 75 are provided for inserting into the clamping holes 77 at corresponding positions, so as to form a clamping installation of the sleeve 71 and the two casings 1, and have good disassembly and assembly functions, which is not only convenient for the staff to carry and transport the monitoring equipment by classification and facilitate the staff to dismantle and recycle the collapse monitoring assembly 7 in the later stage, thereby improving the utilization rate of the collapse monitoring assembly 7, but also convenient for the staff to control the collapse monitoring assemblies 7 at different positions and with different numbers according to the actual situation of the karst collapse monitoring area, thereby improving the karst collapse monitoring effect.

[0055] The two groups of T-shaped latches 75 are fixedly connected to the fixing sleeve 72 through V-shaped metal springs 76, and the two groups of T-shaped latches 75 are fixedly connected with L-shaped toggle blocks;

[0056] The V-shaped metal spring piece 76 is provided to elastically squeeze the T-shaped pin 75 so that one end of the T-shaped pin 75 is inserted into the annular groove 74 at the corresponding position, and then can be inserted into the clamping hole 77 at the corresponding position, thereby forming a clamping installation of the sleeve 1 and the collapse monitoring component 7. The L-shaped toggle block is provided to facilitate subsequent staff to dismantle the collapse monitoring component 7 in the monitoring equipment of the collapse area for recycling.

[0057] Embodiment 3: Based on embodiment 1, the difference is that;

[0058] See attached Fig. 9 and Fig.10 The water level monitoring assembly 8 includes a collar 81 fixed inside the protective cover 3, a scale rod 82 is arranged inside the collar 81, the bottom end of the scale rod 82 extends to the inside of the casing 1, a hollow buoy 83 is fixedly connected to the bottom end of the scale rod 82, and the top of the buoy 83 is set in a cone shape, and the top of the scale rod 82 extends to the top of the cover plate 4;

[0059] The float 83 is provided to float on the water level surface inside the casing 1. The water level condition can be understood by observing the scale lines on the outer surface of the scale rod 82. The interior of the float 83 is hollow so that it can better float on the liquid surface. The top of the float 83 is provided as a conical surface so that when the float 83 floats upward, it can better pass through the fixed sleeve 72 to reach different positions of the casing 1, thereby improving the range of its water level monitoring.

[0060] A camera 84 for photographing the scale lines on the outer surface of the scale bar 82 is fixedly connected to the inside of the protective cover 3, and a control member 85 is arranged inside the protective cover 3;

[0061] The camera 84 is used to take real-time video of the scale pole 82, and the automatic acquisition and transmission system 5 is used to remotely transmit data. The control element 85 is used to drive the camera 84 according to the floating water level, so that the camera 84 does not need to work in real time. When the water level does not change, the camera 84 can be in a standby state, thereby avoiding the camera 84 from collecting unnecessary data for a long time, which greatly wastes data storage content and electric energy.

[0062] The control member 85 includes a plurality of control ports 851 opened inside the scale mark rod 82 and a U-shaped frame 852 fixed to the bottom of the inner wall of the protective cover 3. The interior of the U-shaped frame 852 is rotatably connected to an inclined T-shaped control block 853 via a rotating shaft, and one end of the T-shaped control block 853 is inserted into the interior of one of the control ports 851. Two torsion springs 854 are provided at the rotating end of the T-shaped control block 853. The top of the U-shaped frame 852 is fixedly connected to a second touch switch 855 via an L-shaped rod.

[0063] When the scale mark 82 floats upward, the T-shaped control block 853 can move upward in a fan shape. The upward movement of the T-shaped control block 853 can touch and turn on the second touch switch 855, so that the second touch switch 855 starts the camera 84, allowing the camera 84 to collect water level change data in the first time, further improving the water level monitoring effect, and solving the problem that the camera 84 for water level monitoring in the prior art is in an on state for a long time, which not only consumes a lot of electricity, but also collects a lot of unnecessary data, greatly occupying the memory for data storage.

[0064] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for karst collapse, comprising a server and a wireless network transmission unit, wherein the input end of the wireless network transmission unit is connected to the output ends of several subsystems, and the output end of the wireless network transmission unit is connected to the input end of the server, characterized in that: The subsystem comprises a borehole opened between a soil layer and a bedrock, wherein a casing (1) is arranged inside the borehole, a buried support seat (2) is fixedly connected to the top of the casing (1), a protective cover (3) is fixedly connected to the inside of the support seat (2), a cover plate (4) is detachably mounted on the top of the protective cover (3), an automatic collection and transmission system (5) is arranged inside the protective cover (3), and a concrete filling material (6) is filled between the support seat (2) and the protective cover (3), and a plurality of collapse monitoring components (7) and water level monitoring components (8) are arranged on the casing (1); The collapse monitoring assembly (7) comprises a sleeve (71) detachably mounted on the sleeve (1); the interior of the sleeve (71) is fixedly connected to a fixed sleeve (72) via a bracket; the outer surface of the sleeve (71) is provided with a plurality of water inlets, and the interiors of the plurality of water inlets are fixedly connected to a water filter membrane (73); and a plurality of settlement monitoring components (78) are arranged between the sleeve (71) and the fixed sleeve (72).

2. A monitoring device for karst collapse according to claim 1, characterized in that: The settlement monitoring component (78) comprises a spherical groove formed on the outer surface of the sleeve (71), the interior of the spherical groove is movably connected to a spherical block (781), the interior of the spherical block (781) is fixedly connected to a balance rod (782), and the outer surface of one end of the balance rod (782) is fixedly connected to four force-bearing plates (783).

3. A monitoring device for karst collapse according to claim 2, characterized in that: The other end of the balance rod (782) is fixedly connected to a trigger rod (784), one end of the trigger rod (784) is fixedly connected to a vertical rope (785), one end of the rope (785) is fixedly connected to a sliding frame (786), and the sliding frame (786) is slidably connected to the outer surface of the fixed sleeve (72), and a trigger member for detecting the upwardly driven sliding frame (786) is provided at the bottom of the fixed sleeve (72).

4. A monitoring device for karst collapse according to claim 3, characterized in that: The trigger member comprises a control box (787) fixed to the bottom of the fixed sleeve (72); a lifting plate (788) is slidably connected to one side of the inner wall of the control box (787); and a connecting rod (789), a return spring (7810), and a first touch switch (7811) are fixedly connected to the top of the lifting plate (788); the top of the connecting rod (789) extends to the top of the control box (787); the top of the connecting rod (789) is fixed to the bottom of the sliding frame (786); the top of the return spring (7810) is fixed to the top of the inner wall of the control box (787); and a data generator is installed at the bottom of the inner wall of the control box (787).

5. The monitoring device for karst collapse according to claim 1, characterized in that: The sleeve (1) comprises a plurality of branch pipes, two adjacent branch pipes are detachably fixed by a collapse monitoring assembly (7), the top and bottom of the sleeve (71) are provided with annular grooves (74) for inserting the branch pipes, and both sides of the inner walls of the two annular grooves (74) are fixedly connected with sealing sleeves, the interior of the sleeve (71) is slidably connected with two groups of T-shaped pins (75), one end of the two groups of T-shaped pins (75) respectively extends into the interior of the two annular grooves (74), and one end of the two adjacent branch pipes is provided with a clamping hole (77) for inserting the T-shaped pins (75).

6. A monitoring device for karst collapse according to claim 5, characterized in that: The two groups of T-shaped latch pins (75) are fixedly connected to the fixing sleeve (72) through V-shaped metal spring pieces (76), and the two groups of T-shaped latch pins (75) are fixedly connected with L-shaped toggle blocks.

7. A monitoring device for karst collapse according to claim 1, characterized in that: The water level monitoring assembly (8) comprises a collar (81) fixed inside the protective cover (3), a scale rod (82) is arranged inside the collar (81), the bottom end of the scale rod (82) extends to the inside of the casing (1), a hollow buoy (83) is fixedly connected to the bottom end of the scale rod (82), and the top of the buoy (83) is arranged in a cone shape, and the top end of the scale rod (82) extends to the top of the cover plate (4).

8. A monitoring device for karst collapse according to claim 7, characterized in that: A camera (84) for photographing the scale lines on the outer surface of the scale bar (82) is fixedly connected to the interior of the protective cover (3), and a control component (85) is arranged inside the protective cover (3); The control member (85) comprises a plurality of control ports (851) opened inside the scale mark rod (82) and a U-shaped frame (852) fixed to the bottom of the inner wall of the protective cover (3); the interior of the U-shaped frame (852) is rotatably connected to an inclined T-shaped control block (853) via a rotating shaft, and one end of the T-shaped control block (853) is inserted into the interior of one of the control ports (851); two torsion springs (854) are provided at the rotating end of the T-shaped control block (853); and the top of the U-shaped frame (852) is fixedly connected to a second touch switch (855) via an L-shaped rod.

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