Reservoir dam settlement observation device

Abstract

The invention relates to the technical field of dam safety monitoring, and discloses a reservoir dam settlement observation device which comprises a base, a leveling mechanism is arranged at the top of the base, a supporting table top is arranged at the top of the leveling mechanism, an observation instrument is arranged at one end of the supporting table top, and the leveling mechanism comprises a support. The bottom of the support is fixedly connected to the top of the base, a universal joint is arranged at the top of the support, a top node of the universal joint is connected with the bottom of the supporting table top, a partition plate is fixedly connected to the outer side of the support, a buffering piece is arranged on the inner wall of the partition plate, and a locking piece is fixedly connected to the top of the partition plate. The outer side of the transmission rod is slidably connected to the inner wall of the partition plate. According to the invention, the stability in the leveling process and the use process is realized, so that a stable horizontal supporting table foundation is provided for the observation device on the premise of mounting surfaces with different gradients and flatness, and the observation precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dam safety monitoring, and in particular to a reservoir dam settlement observation device. Background Art

[0002] As a vital water conservancy facility, the structural stability of a dam is directly linked to the safety of the surrounding area. To monitor dam settlement in real time, it is often necessary to deploy observation devices on or around the dam surface, collecting data using high-precision sensors.

[0003] In the safety monitoring system of reservoir dams, settlement observation is a key link in ensuring the safe operation of the dam. Accurate settlement data is of great significance for evaluating the stability of the dam and guiding maintenance decisions. At present, the settlement observation devices for reservoir dams on the market have obvious shortcomings in leveling and stability control. Most existing devices use a basic bracket with a simple leveling component. When facing the inclined installation position on the dam surface, the leveling operation lacks a buffer mechanism, the impact and vibration are large, and it is difficult to ensure accuracy. Moreover, after leveling, the support surface is easily tilted by external factors such as wind and human touch. The existing structure cannot effectively cope with it, resulting in a significant decrease in observation accuracy.

[0004] Therefore, in view of the above problems, a reservoir dam settlement observation device is proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides a reservoir dam settlement observation device, which aims to improve the shortcomings of some devices in the existing technology in leveling and stability control.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A reservoir dam settlement observation device comprises a base, a leveling mechanism is provided on the top of the base, a support table is provided on the top of the leveling mechanism, and an observation instrument is provided at one end of the support table; The leveling mechanism includes a bracket, the bottom of the bracket is fixedly connected to the top of the base, the top of the bracket is provided with a universal joint, the top node of the universal joint is connected to the bottom of the support table, the outer side of the bracket is fixedly connected to a partition, the inner wall of the partition is provided with a buffer, and the top of the partition is fixedly connected to a locking member; The buffer member includes a plurality of transmission rods, the outer sides of the transmission rods are slidably connected to the inner wall of the partition, the bottoms of the transmission rods are fixedly connected to anti-slip blocks, a second spring is fixedly connected between the bottom of the partition and the anti-slip blocks, and the second spring is sleeved on the outer sides of the transmission rods; As a further description of the above technical solution: The buffer member also includes a slide rod, the two ends of the slide rod are fixedly connected to the bottom of the support table, the outer side of the slide rod is provided with two springs, the outer sides of the two slide rods are slidably connected to a slide column, the outer wall of the slide column is connected to the plurality of springs, and the outer wall of the slide column is rotatably connected to the top of the transmission rod; As a further description of the above technical solution: The bottom of the support table is provided with a plurality of slide grooves, the two ends of the slide column are slidably connected inside the slide grooves, and the size of the slide grooves allows the top of the transmission column to rotate; As a further description of the above technical solution: The locking member includes an inner shrink ring, the bottom of which is fixedly connected to the top of the partition, a clamp is sleeved on the outer side of the inner shrink ring, a connecting rod is rotatably connected between the two open ends of the clamp, one end of the connecting rod is fixedly connected to a threaded column, a locking nut is sleeved on the outer side of the threaded column, and one side of the locking nut is in contact with one end of the clamp; As a further description of the above technical solution: The observation instrument includes a plurality of support plates, the bottoms of the plurality of support plates are detachably connected to the top of the support table, the other ends of the plurality of support plates are provided with a fixing ring, the inner side of the fixing ring is detachably connected to an electronic compartment, the top of the electronic compartment is provided with an observation cable, the bottom of the electronic compartment is provided with a telescopic measuring rod, one end of the support table is fixedly connected to a limited center ring, the outer wall of the telescopic measuring rod is slidably connected to the inner side of the limited center ring, the bottom of the limiting ring is detachably connected to a sleeve, and the bottom of the telescopic measuring rod is fixedly connected to a sealing member; As a further description of the above technical solution: The sealing member includes a grounding block, the top of the grounding block is fixedly connected to the bottom of the telescopic measuring rod, a sealing ring 1 and a sealing ring 2 are provided inside the grounding block, a tightening outer ring and a tightening inner ring are provided inside the grounding block, and both ends of the tightening inner ring are slidably connected to the inside of the tightening outer ring, the inner sides of the tightening inner ring and the tightening outer ring are in contact with the outer side of the sealing ring 2, the outer sides of the tightening outer ring and the tightening inner ring are rotatably connected to a top screw, and the top screw is threadedly connected to the outside of the grounding block; As a further description of the above technical solution: The sleeve is retractable, and the bottom of the sleeve is detachably connected between the first sealing ring and the second sealing ring; As a further description of the above technical solution: The other ends of the support table are all provided with counterweight blocks, and the weight of the counterweight blocks is the same as the weight of the observation instrument. The bottom of the base is provided with a plurality of ground nails.

[0007] The present invention has the following beneficial effects: 1. In this invention, the coordination of the universal joint, buffer, and locking member in the leveling mechanism ensures stability during both leveling and use. The universal joint allows the support surface to be adjusted horizontally at multiple angles relative to the tilted surface. During leveling, the support surface rotates, compressing and stretching the transmission rod, driving the slide column to deform springs one and two, reducing impact vibration and providing preload. After leveling, the locking member tightens the inner retraction ring to secure the support surface. When subjected to external forces, the spring preload mitigates the tilting tendency, ensuring that the support surface remains level, providing a stable foundation for observation and improving observation accuracy.

[0008] 2. In the present invention, the telescopic measuring rod is fully protected throughout its extension and retraction process by the coordinated use of the retractable sleeve, sealing ring, and tightening structure within the seal. The sleeve extends and retracts synchronously with the telescopic measuring rod. Sealing rings one and two within the grounding block cooperate, and rotating the jackscrew tightens the outer ring against the inner ring to squeeze sealing ring two, enhancing sealing performance. The sleeve and sealing ring work together to isolate the telescopic measuring rod from the external environment, preventing interference from external factors. This ensures the accuracy of the telescopic measuring rod when monitoring dam settlement, increases the reliability of data transmitted by the electronic compartment via the observation cable, and guarantees the accuracy and stability of settlement observations. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a three-dimensional schematic diagram of a reservoir dam settlement observation device proposed by the present invention; Figure 2 This is a schematic plan view of a reservoir dam settlement observation device proposed by the present invention; Figure 3 This is a structural schematic diagram of a leveling mechanism of a reservoir dam settlement observation device proposed by the present invention; Figure 4 This is a schematic structural diagram of a fastener for a reservoir dam settlement observation device proposed by the present invention; Figure 5 for Figure 3 Enlarged view of point A in the middle; Figure 6 This is a structural schematic diagram of an observation instrument for a reservoir dam settlement observation device proposed by the present invention; Figure 7 This is a schematic structural diagram of a telescopic measuring rod of a reservoir dam settlement observation device proposed by the present invention; Figure 8 This is a structural schematic diagram of a seal for a reservoir dam settlement observation device proposed by the present invention; Figure 9 This is a structural schematic diagram of a reinforcement member of a reservoir dam settlement observation device proposed by the present invention.

[0010] Legend: 1. Base; 2. Ground nail; 3. Leveling mechanism; 31. Bracket; 32. Universal joint; 33. Partition; 34. Buffer; 341. Transmission rod; 342. Sliding column; 343. Sliding rod; 344. Spring 1; 345. Slide; 346. Anti-slip block; 347. Spring 2; 35. Locking piece; 351. Retracting ring; 352. Hoop; 353. Connecting rod; 354. Threaded column; 355. Locking nut; 36. Reinforcement ; 361, threaded rod; 362, cam; 363, limit block; 4, support table; 5, counterweight; 6, observation instrument; 61, center limit ring; 62, support plate; 63, fixing ring; 64, electronic compartment; 65, observation cable; 66, telescopic measuring rod; 67, sleeve; 68, seal; 681, grounding block; 682, sealing ring 1; 683, sealing ring 2; 684, tighten outer ring; 685, tighten inner ring; 686, top screw. DETAILED DESCRIPTION

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0012] Example 1: Reference Figures 1 to 8 The present invention provides an embodiment: a reservoir dam settlement observation device, comprising a base 1, a plurality of ground spikes 2 are provided at the bottom of the base 1, and the ground spikes 2 are inserted into the ground through a sharp structure to fix the position of the base 1 and prevent the device from shifting or shaking during the observation process. A leveling mechanism 3 is provided on the top of the base 1, and a support table 4 is provided on the top of the leveling mechanism 3. An observation instrument 6 is provided at one end of the support table 4, and counterweights 5 are provided at the other ends of the support table 4. The weight of the counterweights 5 is the same as that of the observation instrument 6. The weight on both sides of the support table 4 is balanced by the counterweights 5 to offset the unilateral gravity of the observation instrument 6 and prevent the table from tilting.

[0013] The leveling mechanism 3 includes a bracket 31, the bottom of which is fixedly connected to the top of the base 1. A universal joint 32 is provided at the top of the bracket 31. This universal joint 32 allows the support surface 4 to be flexibly adjusted to a horizontal position at multiple angles to accommodate various tilted bases. The top node of the universal joint 32 is connected to the bottom of the support surface 4. A partition 33 is fixedly connected to the outside of the bracket 31, providing a fixed support base for the buffer assembly and locking member 35. The inner wall of the partition 33 is provided with a buffer member 34, and the top of the partition 33 is fixedly connected to the locking member 35.

[0014] The buffer member 34 includes multiple transmission rods 341, the outer side of the transmission rod 341 is slidably connected to the inner wall of the partition 33, and the bottom of the transmission rod 341 is fixedly connected with an anti-slip block 346, which is used to prevent the spring from detaching and transmit the mechanical changes of the leveling action. A spring 2 347 is fixedly connected between the bottom of the partition 33 and the anti-slip block 346. The spring 2 347 is compressed or stretched to buffer the impact and vibration during the leveling process, and provide reverse preload to maintain stability. The spring 2 347 is sleeved on the outer side of the transmission rod 341.

[0015] The buffer member 34 also includes a slide bar 343, each end of which is fixedly connected to the bottom of the support table 4. Two springs 1 344 are sleeved on the outside of the slide bar 343. The deformation of the springs 1 344 absorbs the vibration energy of the support table 4 during leveling and when subjected to external forces, assisting in the smooth adjustment of the support table 4. A slide column 342 is slidably connected to the outside of the two slide bars 343, converting the rotational motion of the support table 4 into linear sliding motion. The slide column 342 cooperates with a slide groove 345 to limit the direction of motion and ensure accurate transmission of the leveling action. The outer wall of the slide column 342 is connected to multiple springs 1 344, and the outer wall of the slide column 342 is rotatably connected to the top of the transmission rod 341. Multiple slide grooves 345 are defined at the bottom of the support table 4 to guide the linear sliding of the slide column 342 and limit the range of motion of the transmission rod 341, ensuring stable and controllable leveling action. The ends of the slide column 342 are slidably connected within the slide grooves 345, and the slide grooves 345 are sized to allow the top of the transmission column to rotate.

[0016] The locking member 35 includes an inner shrinking ring 351, the bottom of the inner shrinking ring 351 is fixedly connected to the top of the partition 33, and the outer side of the inner shrinking ring 351 is provided with a clamping hoop 352. By tightening the opening of the clamping hoop 352, the inner shrinking ring 351 is pressed to form a rigid locking force to fix the position of the support table 4 after leveling. A connecting rod 353 is rotatably connected between the two ends of the opening of the clamping hoop 352, and one end of the connecting rod 353 is fixedly connected to a threaded column 354. The outer side of the threaded column 354 is provided with a locking nut 355, and one side of the locking nut 355 is in contact with one end of the clamping hoop 352.

[0017] The observation instrument 6 includes multiple support plates 62, the bottoms of the multiple support plates 62 are detachably connected to the top of the support table 4, and the other ends of the multiple support plates 62 are provided with a fixing ring 63, which fixes the electronic compartment 64 through the detachable structure, which is convenient for installation and maintenance and keeps the equipment stable. The inner side of the fixing ring 63 is detachably connected to the electronic compartment 64, and the built-in sensor collects data. The top of the electronic compartment 64 is provided with an observation cable 65, which is transmitted to the external device in real time through the cable to ensure monitoring continuity. The bottom of the electronic compartment 64 is provided with a telescopic measuring rod 66, which is connected to the electronic compartment 64. The vertical telescopic structure of the telescopic measuring rod 66 contacts the dam surface, detects settlement changes in real time and feeds back data. One end of the support table 4 is fixedly connected to the limited center ring 61 to limit the movement trajectory of the telescopic measuring rod 66, ensure its vertical lifting and lowering, and avoid deflection affecting the measurement accuracy. The outer wall of the telescopic measuring rod 66 is slidably connected to the inner side of the limited center ring 61. The bottom of the limiting ring is detachably connected to a sleeve 67, covering the telescopic path of the telescopic measuring rod 66, isolating it from external dust and water vapor erosion, and protecting the internal structure. The bottom of the telescopic measuring rod 66 is fixedly connected to a seal 68.

[0018] The seal 68 includes a grounding block 681, the top of which is fixedly connected to the bottom of the telescopic measuring rod 66, and a sealing ring 1 682 and a sealing ring 2 683 are provided inside the grounding block 681. The double-layer sealing design prevents the external environmental medium from penetrating into the sleeve 67, and a tightening outer ring 684 and a tightening inner ring 685 are provided inside the grounding block 681. The sealing ring is squeezed by adjusting the top screw 686 to dynamically enhance the sealing performance to adapt to different working conditions. The two ends of the tightening inner ring 685 are slidably connected to the inside of the tightening outer ring 684, and the inner sides of the tightening inner ring 685 and the tightening outer ring 684 are in contact with the outer side of the sealing ring 2 683. The sleeve 67 is retractable, and the bottom of the sleeve 67 is detachably connected between the sealing ring 1 682 and the sealing ring 2 683. The outer sides of the tightening outer ring 684 and the tightening inner ring 685 are both rotatably connected with a top screw 686. The top screw 686 serves as a manual adjustment tool. When rotated, it pushes the tightening ring to compress the sealing ring to achieve flexible control of the sealing pressure. The top screw 686 is threadedly connected to the outside of the grounding block 681.

[0019] Example 2: Reference Figure 9Based on the first embodiment, this embodiment optimizes the design of the transmission rod 341. Specifically, a reinforcement 36 is provided on the outside of the transmission rod 341. The reinforcement 36 includes a threaded rod 361, and the subsequent structure is driven by the threaded rod 361 to move. The outer side of the threaded rod 361 is threadedly connected to the outside of the transmission rod 341. The end of the threaded rod 361 is fixedly connected to a cam 362. When the threaded rod 361 rotates, it drives the cam 362 to rotate and move linearly. A plurality of limiting blocks 363 are fixedly connected to the top of the partition 33. The top of the limiting blocks 363 contacts the outer wall of the cam 362. The contact between the limiting blocks 363 and the cam 362 limits the downward movement of the transmission rod 341 in the vertical direction. Therefore, the design of the four reinforcements 36 ensures that the transmission rod 341 can always remain stable after the support table 4 is adjusted, thereby ensuring the stability of the support table 4.

[0020] Furthermore, a plurality of arc-shaped grooves are provided on the top of the limiting block 363, and a plurality of circular protrusions are provided on the surface of the cam 362. The shape of the circular protrusions is adapted to the shape of the arc-shaped grooves, so that the surface of the cam 362 forms a mutual extrusion effect after contacting the top of the limiting block 363, and the arc-shaped grooves and the circular protrusions prevent the cam from slipping. Therefore, after adjusting the support table 4, the entire support table 4 can be kept stable through the extrusion effect of the cam 362 and the limiting block 363.

[0021] Furthermore, the width of the limiting block 363 is greater than the width of the cam 362. A movable slot is defined within the transmission rod 341, within which the cam 362 rotates. The width of the movable slot is greater than the width of the cam 362. This ensures that the rotation of the cam 362 is unrestricted. Furthermore, since the threaded rod 361 simultaneously drives the cam 362 in linear motion, the width of the limiting block 363 being greater than the width of the cam 362 ensures that the cam 362 maintains close contact with the outer surface of the limiting block 363 even after this linear motion.

[0022] After the support table 4 is adjusted, the threaded rod 361 is rotated, and the rotation of the threaded rod 361 drives the cam 362 to rotate, so that the convex surface of the cam 362 contacts and squeezes the groove surface on the limiting block 363, thereby limiting the movement of the entire transmission rod 341 in the vertical direction, and making it difficult for the support table 4 to shake when affected by external forces, thereby ensuring that the entire support table 4 always remains stable when the observer 6 is operating.

[0023] Working principle: First, place the base 1 at the target observation position of the dam, and forcefully insert the ground spike 2 at the bottom of the base 1 into the ground. The firm engagement of the ground spike 2 with the ground ensures that the base 1 remains stable during the subsequent observation process and will not be displaced or shaken due to external factors.

[0024] Next, the support table 4 is leveled using the leveling mechanism 3. A universal joint 32 is provided at the top of the bracket 31 in the leveling mechanism 3. The top node of the universal joint 32 is connected to the bottom of the support table 4. When the installation position of the base 1 is an inclined surface, the support table 4 can be flexibly adjusted at multiple angles through the universal joint 32, so that the support table 4 remains horizontal. In this process, the buffer 34 plays an auxiliary role: the transmission rod 341 is squeezed or stretched by the rotation of the support table 4, thereby driving the corresponding transmission rod 341 to move in the vertical direction. In this process, the sliding column 342 slides in the slide groove 345 to deform the spring 1 344, and the movement of the transmission column causes the spring 2 347 to deform, thereby reducing the impact and vibration during the leveling process and providing a certain preload force.

[0025] After leveling is completed, the support table 4 is fixed by the locking member 35. The bottom of the inner shrinking ring 351 of the locking member 35 is fixed to the top of the partition 33, and the clamp 352 is placed on the outside of the inner shrinking ring 351. The locking nut 355 on the threaded column 354 is rotated to rotate and tighten the open ends of the clamp 352 through the connecting rod 353, thereby generating pressure on the inner shrinking ring 351, so that the position of the transmission column is fixed. When the support table 4 is subjected to external force, the support table 4 tends to tilt, and the preload force of the spring 1 344 and the preload force of the spring 2 347 alleviate the tilting tendency of the support table 4, thereby ensuring that the support table 4 always remains in a horizontal state after adjustment, thereby improving the observation accuracy.

[0026] Then, install the observation instrument 6. After adjusting the support plate 62 to the appropriate angle, and installing the electronic compartment 64 on the inner side of the fixed ring 63, the observation cable 65 on the top of the electronic compartment 64 is connected to the external data acquisition equipment. The outer wall of the telescopic measuring rod 66 at the bottom of the electronic compartment 64 is slidably connected to the inner side of the centering ring 61 to ensure that the telescopic measuring rod 66 is vertical and stable. In the seal 68 at the bottom of the telescopic measuring rod 66, a sealing ring 1 682 and a sealing ring 2 683 are set inside the grounding block 681. By rotating the top screw 686, the tightening outer ring 684 and the tightening inner ring 685 slide inside the grounding block 681 and squeeze the sealing ring 2 683 to enhance the sealing effect. The bottom of the telescopic sleeve 67 is connected between the sealing ring 1 682 and the sealing ring 2 683 to further ensure the sealing performance and structural stability, and to drive the sleeve 67 to retract synchronously while the telescopic measuring rod 66 descends, thereby protecting the measuring rod from the influence of the external environment, thereby improving the measurement accuracy.

[0027] Finally, counterweights 5 of the same weight as the observation instrument 6 are installed at the other ends of the support platform 4. This balance principle ensures that the support platform 4 remains balanced during observation, preventing tilt caused by excessive weight on one side, which could affect observation accuracy. At this point, the entire device is installed and debugged. The telescopic measuring rod 66 of the observation instrument 6 can be used to monitor dam settlement in real time. The electronic compartment 64 transmits the data to external equipment via observation cable 65, completing the settlement observation process.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reservoir dam settlement observation device, comprising a base (1), characterized in that: A leveling mechanism (3) is provided on the top of the base (1), a supporting table (4) is provided on the top of the leveling mechanism (3), and an observation instrument (6) is provided at one end of the supporting table (4); The leveling mechanism (3) includes a bracket (31), the bottom of the bracket (31) is fixedly connected to the top of the base (1), a universal joint (32) is provided on the top of the bracket (31), the top node of the universal joint (32) is connected to the bottom of the support table (4), a partition (33) is fixedly connected to the outside of the bracket (31), a buffer (34) is provided on the inner wall of the partition (33), and a locking member (35) is fixedly connected to the top of the partition (33); The buffer member (34) includes a plurality of transmission rods (341), the outer sides of the transmission rods (341) are slidably connected to the inner wall of the partition (33), the bottom of the transmission rods (341) is fixedly connected to an anti-slip block (346), a second spring (347) is fixedly connected between the bottom of the partition (33) and the anti-slip block (346), and the second spring (347) is sleeved on the outer side of the transmission rods (341).

2. A reservoir dam settlement observation device according to claim 1, characterized in that: The buffer member (34) further includes a slide rod (343), both ends of which are fixedly connected to the bottom of the support table (4), two springs (344) are sleeved on the outer side of the slide rod (343), and a slide column (342) is slidably connected to the outer sides of the two slide rods (343), and the outer wall of the slide column (342) is connected to a plurality of springs (344), and the outer wall of the slide column (342) is rotatably connected to the top of the transmission rod (341).

3. A reservoir dam settlement observation device according to claim 2, characterized in that: A plurality of slide grooves (345) are provided at the bottom of the support table (4), and both ends of the slide column (342) are slidably connected inside the slide grooves (345). The slide grooves (345) are sized to allow the top of the transmission column to rotate.

4. The reservoir dam settlement observation device according to claim 1, characterized in that: The locking member (35) comprises an inner shrinking ring (351), the bottom of the inner shrinking ring (351) is fixedly connected to the top of the partition (33), the outer side of the inner shrinking ring (351) is provided with a clamp (352), the two open ends of the clamp (352) are rotatably connected with a connecting rod (353), one end of the connecting rod (353) is fixedly connected to a threaded column (354), the outer side of the threaded column (354) is provided with a locking nut (355), and one side of the locking nut (355) is in contact with one end of the clamp (352).

5. The reservoir dam settlement observation device according to claim 1, characterized in that: The observation instrument (6) includes a plurality of support plates (62), the bottoms of the plurality of support plates (62) are detachably connected to the top of the support table (4), the other ends of the plurality of support plates (62) are provided with a fixing ring (63), the inner side of the fixing ring (63) is detachably connected to an electronic compartment (64), the top of the electronic compartment (64) is provided with an observation cable (65), the bottom of the electronic compartment (64) is provided with a telescopic measuring rod (66), one end of the support table (4) is fixedly connected to the limited center ring (61), the outer wall of the telescopic measuring rod (66) is slidably connected to the inner side of the limited center ring (61), the bottom of the limiting ring is detachably connected to a sleeve (67), and the bottom of the telescopic measuring rod (66) is fixedly connected to a sealing member (68).

6. The reservoir dam settlement observation device according to claim 5, characterized in that: The sealing member (68) includes a grounding block (681), the top of the grounding block (681) is fixedly connected to the bottom of the telescopic measuring rod (66), a sealing ring 1 (682) and a sealing ring 2 (683) are provided inside the grounding block (681), a tightening outer ring (684) and a tightening inner ring (685) are provided inside the grounding block (681), and both ends of the tightening inner ring (685) are slidably connected to the inside of the tightening outer ring (684), the inner sides of the tightening inner ring (685) and the tightening outer ring (684) are in contact with the outer side of the sealing ring 2 (683), and the outer sides of the tightening outer ring (684) and the tightening inner ring (685) are rotatably connected to a top screw (686), and the top screw (686) is threadedly connected to the outside of the grounding block (681).

7. The reservoir dam settlement observation device according to claim 6, characterized in that: The sleeve (67) is retractable, and the bottom of the sleeve (67) is detachably connected between the first sealing ring (682) and the second sealing ring (683).

8. The reservoir dam settlement observation device according to claim 1, characterized in that: The other ends of the support table (4) are each provided with a counterweight (5), and the weight of the counterweight (5) is the same as the weight of the observation instrument (6). The bottom of the base (1) is provided with a plurality of ground nails (2).

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