Stability process monitoring device for spoil field

Abstract

The utility model discloses a spoil site stability process monitoring device which comprises a monitoring pile arranged on a spoil site soil piling side slope, two reference piles arranged on the two sides of the monitoring pile and located at stable positions outside the range of a spoil site, and an observation pile. The top ends of the reference pile and the monitoring pile are flush, a steel wire rope provided with a first strain gauge is connected between the reference pile and the monitoring pile, and the two steel wire ropes located on the two sides of the monitoring pile are located on the same straight line; a data acquisition instrument connected with the first strain gauge is mounted on the observation pile; a stabilizing mechanism is arranged at the bottom end of the monitoring pile; the stabilizing mechanism comprises a stabilizing rod fixedly connected to the bottom end of the monitoring pile, a plurality of dispersing blocks are vertically and fixedly connected to the surface of the stabilizing rod, the dispersing blocks are annularly distributed on the surface of the stabilizing rod, and the cross section of each dispersing block is in an isosceles triangle shape. According to the spoil site stability process monitoring device, the problem that the monitoring pile is unstable on the spoil site slope due to the fact that the contact area between the monitoring pile and the slope soil is limited is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of abandoned soil field monitoring, in particular to an abandoned soil field stability process monitoring device. Background Art

[0002] There is a large amount of fill in the area of ​​the abandoned soil site. Different soil quality, weather changes, poor drainage conditions, and the impact of nearby construction are all likely to cause soil collapse, landslides and other disasters. Safety monitoring is an important method to ensure the stability of the abandoned soil site, especially for large-scale abandoned soil sites with poor drainage and high fill slopes. Whether the stability of the abandoned soil site can be correctly evaluated by the monitoring results and then the abandoned soil site can be strengthened in time is directly related to the local environmental protection work and the safety of people's property and life. The stability of general abandoned soil sites is only evaluated in the site selection and design stages, and there is no systematic monitoring in the later use stage. Large-scale abandoned soil sites will be evaluated for stability through comprehensive on-site investigations. Therefore, a construction unit has developed and designed a device for monitoring the stability of a soil dump, and submitted a Chinese patent application, which is titled: A device for monitoring the stability of a soil dump, application number: 201920603184.9, application date: 2019.04.28, abstract: The utility model discloses a device for monitoring the stability of a soil dump, including a measuring unit arranged on each soil pile slope of the soil dump; the measuring unit includes a monitoring pile arranged on the soil pile slope and two reference piles arranged on both sides of the monitoring pile at a stable position outside the scope of the soil dump, the tops of the reference pile and the monitoring pile are flush with each other and a steel wire rope with a first strain gauge is connected between the two, and the two steel wire ropes located on both sides of the monitoring pile are in the same straight line; the monitoring device also includes a data acquisition instrument connected to the first strain gauge. The utility model can monitor the stability of the soil dump, evaluate the stability of the soil dump, and then decide whether to reinforce the slope to avoid landslide disasters.

[0003] Through applied research, it was found that the monitoring piles of the above-mentioned abandoned soil field stability monitoring device were inserted into the abandoned soil field slope. Because the contact area between the soil in the slope and the monitoring piles was limited, when affected by strong winds, rainfall erosion, etc., the monitoring piles were easily tilted on the slope, thereby affecting the accuracy of abandoned soil field monitoring. Therefore, it is necessary to redesign an abandoned soil field stability process monitoring device to solve the above problems. Summary of the invention

[0004] The utility model aims to provide a device for monitoring the stability process of a spoil field, which improves the problem that the monitoring piles are unstable on the slope of the spoil field due to the limited contact area between the monitoring piles and the soil in the slope.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A device for monitoring the stability process of a spoil field, comprising a monitoring pile arranged on the soil pile slope of the spoil field, two reference piles and an observation pile arranged on both sides of the monitoring pile at a stable position outside the spoil field, the tops of the reference pile and the monitoring pile are flush and a steel wire rope with a first strain gauge is connected between the two, and the two steel wire ropes located on both sides of the monitoring pile are in the same straight line; a data acquisition instrument connected to the first strain gauge is installed on the observation pile; a stabilizing mechanism is arranged at the bottom end of the monitoring pile; the stabilizing mechanism comprises a stabilizing rod fixedly connected to the bottom end of the monitoring pile, a plurality of dispersed blocks are vertically fixedly connected to the surface of the stabilizing rod, and the plurality of dispersed blocks are distributed in a ring shape on the surface of the stabilizing rod, and the cross-sectional shape of the dispersed blocks is an isosceles triangle, and the sharp corners of the isosceles triangle face outward. The insertion of the stabilizing rod into the slope also drives the dispersed blocks to be inserted into the slope, and the dispersed blocks increase the contact area between the monitoring pile and the slope. The bottom end of the monitoring pile is plugged into the slope of the abandoned soil field. A retaining wall is set on one side of the slope. The inner wall of the retaining wall is set with vertical steel bars. The surface of the vertical steel bars is fixedly connected with a second strain gauge. A soil pressure box is set between the retaining wall and the slope. The first strain gauge, the second strain gauge, and the soil pressure box are all connected to the data acquisition instrument by circuit. The pressure inside the retaining wall is measured by the second strain gauge, and the soil pressure between the retaining wall and the slope is measured by the soil pressure box. The above measurement data is collected and analyzed by the data acquisition instrument, so that a comprehensive assessment of the stability of the abandoned soil field can be made. The tops of the reference pile and the monitoring pile are fixedly connected with reflective sheets, and the top of the observation pile is installed with a total station. When the strain gauge monitoring data received on a certain soil pile slope is large or a sudden change occurs, the total station at the top of the observation pile is aligned with the measurement reflective sheet installed on the monitoring pile at that location for measurement, and the precise displacement of the monitoring pile is obtained. It should be noted that the first strain gauge, data acquisition instrument, second strain gauge, earth pressure box, reflective sheet and total station in the above description are all devices with relatively mature application of existing technology. The specific model can be selected according to actual needs. At the same time, the first strain gauge, data acquisition instrument, second strain gauge, earth pressure box and total station can be powered by built-in power supply or by mains power supply. The specific power supply method is selected according to the situation and will not be described here. The monitoring of the earth pile slope is to first select a stable position outside the slope range to install a reference pile as a stable control point, and then arrange monitoring piles on the slope surface of the slope, and connect a steel rope between the arranged monitoring pile and the reference pile. When the steel rope is connected, it should be in a taut state and have initial tensile stress. The data acquisition instrument has a wireless signal transmission function and can transmit data to a remote monitoring computer in the distance to realize long-distance monitoring. When the monitoring data of the first strain gauge and the second strain gauge received on a certain earth pile slope is large or a sudden change occurs, the total station on the observation pile is aligned with the measuring reflective sheet installed on the monitoring pile at that location for measurement to obtain the precise displacement of the monitoring pile. The stability of the earth-pile slope is evaluated based on the measured data to decide whether to reinforce the slope to avoid landslide disasters.

[0007] Further preferred: the stabilizing rod is a cylindrical cone-head stabilizing rod, that is, the top and bottom ends of the stabilizing rod are both conical in shape, the top end extends into the monitoring pile for easy connection with the detection pile, and the bottom end is set with a cone to facilitate the insertion of the stabilizing rod into the slope.

[0008] Further preferred: the monitoring pile is a hollow cylindrical pile, and a notch is vertically arranged on the pile wall on one side of the monitoring pile; a sliding hole is respectively arranged on both sides of the stabilizing rod, and a movable rod is slidably connected in the sliding hole, and the movable rod is slidably connected in the sliding hole in the form of a sliding connection between a hydraulic cylinder and its piston shaft; a stabilizing component is arranged in the monitoring pile, and the stabilizing component includes a liquid storage cylinder fixedly connected to the inner wall of the monitoring pile, and a liquid pushing piston shaft extending from the top of the liquid storage cylinder is slidably connected to the inner wall of the upper end of the liquid storage cylinder, and the sliding connection between the liquid pushing piston shaft and the inner wall of the liquid storage cylinder is also in the form of a sliding connection between the hydraulic cylinder and its piston shaft, and the top of the liquid pushing piston shaft is connected to a guide limit ring extending from the notch and slidably connected to the outer wall of the monitoring pile, and the bottom end of the liquid storage cylinder is connected with a liquid inlet pipe, which extends into the stabilizing rod and is connected with the sliding hole, and a certain amount of hydraulic oil is stored in the liquid storage cylinder. When the monitoring pile needs to be installed on the slope, the monitoring pile and the stabilizing rod are inserted into the slope, pushing the hydraulic piston shaft downward. The downward movement of the hydraulic piston shaft pushes the hydraulic oil in the liquid storage cylinder to be transported to the two sliding holes through the liquid inlet pipe. Excessive hydraulic oil in the sliding hole pushes the movable rod to be inserted into the slope, so that the monitoring pile is stably and vertically inserted on the slope.

[0009] Further preferably, the surface of the movable rod is fixedly connected with annularly distributed fixing blocks, the cross-section of the fixing blocks is an isosceles triangle, and the sharp corners of the isosceles triangle face outward. The movable rod drives the fixing blocks to be inserted into the slope, thereby increasing the contact area between the stabilizing rod and the slope.

[0010] Further preferably, the extended end of the movable rod is conical, so as to facilitate insertion into the slope.

[0011] Further preferred: a pressing handle is provided on the guide limit ring, and a through hole for installing a positioning rod is provided on the guide limit ring. A corresponding limiting hole is also provided on the monitoring pile on the side of the slot. The positioning rod is passed through the through hole and the limiting hole to limit the push piston shaft in the monitoring pile, thereby ensuring the pressure of the hydraulic oil in the liquid storage cylinder, thereby ensuring the stability of the movable rod when inserted into the slope.

[0012] Further preferred: the positioning rod is a positioning rod with external threads, and the through hole and the limiting hole are provided with internal threads matching the positioning rod. When the push liquid piston shaft is pressed down into place, the positioning rod is screwed to connect the through hole and the limiting hole in series, so that the push liquid piston shaft can be limited in the monitoring pile.

[0013] Further preferably, a block is fixedly connected to the push piston shaft and is slidably connected to the inner wall of the monitoring pile, and the block slides in the monitoring pile with the push piston shaft to block the notch. The block blocks the notch on the monitoring pile to prevent impurities from entering the monitoring pile.

[0014] When the present device for monitoring the stability of the abandoned soil field is in use, the monitoring pile and the stabilizing rod are plugged into the slope, the stabilizing rod moves downward to drive the dispersion block to be plugged into the slope, and the hydraulic piston shaft moves downward. The hydraulic piston shaft moves downward to push the hydraulic oil in the liquid storage cylinder to be transported to the two sliding holes through the liquid inlet pipe. There is too much hydraulic oil in the sliding hole, thereby pushing the movable rod and the fixed block to be plugged into the slope, and the positioning rod clamps the hydraulic piston shaft into the monitoring pile to position the hydraulic piston shaft. 1. The stabilizing rod is used to realize the stability of the monitoring pile plugged into the slope of the abandoned soil field, and the hydraulic piston shaft, the liquid storage cylinder, the liquid inlet pipe and the sliding hole are used to realize the stability of the stabilizing rod plugged into the slope of the abandoned soil field, thereby increasing the contact area between the monitoring pile and the slope, ensuring the stability of the monitoring pile when it is vertically plugged into the slope, thereby ensuring the accuracy of the monitoring device in monitoring the abandoned soil field. Dispersion blocks are set on the periphery of the stabilizing rod to achieve the stability of the stabilizing rod when it is inserted into the slope, ensure the contact area between the stabilizing rod and the slope of the spoil field, effectively disperse the lateral pressure of the soil on the monitoring pile and reduce the possibility of tilting; fixed blocks are set on the periphery of the movable rod to achieve the stability of the movable rod when it is inserted into the slope, thereby ensuring the stability of the monitoring pile when it is vertically inserted into the slope of the spoil field. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connection structure of the abandoned soil field stability process monitoring device;

[0016] Figure 2 It is a schematic diagram of the structure of the stabilizing mechanism;

[0017] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 A schematic diagram of the installation connection structure for stabilizing the components;

[0019] The names corresponding to the numbers in the figure are:

[0020] 1. Reference pile; 2. Monitoring pile; 21. Notch; 22. Limit hole; 3. Wire rope; 4. First strain gauge; 5. Observation pile; 6. Data acquisition instrument; 7. Stabilizing mechanism; 71. Stabilizing rod; 72. Sliding hole; 73. Movable rod; 74. Stabilizing assembly; 741. Liquid storage cylinder; 742. Liquid inlet pipe; 743. Liquid pushing piston shaft; 744. Positioning rod; 745. Dispersion block; 746. Fixed block; 747. Stop block; 748. Guide limit ring; 749. Through hole; 750. Press handle; 8. Abandonment site. DETAILED DESCRIPTION

[0021] In order to describe the present technology more clearly, the present technology is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0022] A device for monitoring the stability process of a spoil field comprises a monitoring pile 2 arranged on a soil-pile slope of a spoil field 8, two reference piles 1 and an observation pile 5 arranged on both sides of the monitoring pile 2 at a stable position outside the spoil field 8, the tops of the reference pile 1 and the monitoring pile 2 are flush with each other and a steel wire 3 provided with a first strain gauge 4 is connected between the two, and the two steel wires 3 located on both sides of the monitoring pile 2 are in the same straight line; a data acquisition instrument 6 connected to the first strain gauge 4 is installed on the observation pile 5; a stabilizing mechanism 7 is arranged at the bottom end of the monitoring pile 2; the stabilizing mechanism 7 comprises a stabilizing rod 71 fixedly connected to the bottom end of the monitoring pile 2, a plurality of dispersed blocks 745 are vertically fixedly connected to the surface of the stabilizing rod 71, and the plurality of dispersed blocks 745 are distributed in a ring shape on the surface of the stabilizing rod 71, and the cross-sectional shape of the dispersed blocks 745 is an isosceles triangle, and the sharp corners of the isosceles triangle face outward. The stabilizing rod 71 is inserted into the slope and also drives the dispersed blocks 745 to be inserted into the slope, and the dispersed blocks 745 increase the contact area between the monitoring pile 2 and the slope. The bottom end of the monitoring pile 2 is plugged into the slope of the abandoned soil field 8. A retaining wall is set on one side of the slope. The inner wall of the retaining wall is set with vertical steel bars. The surface of the vertical steel bars is fixedly connected with a second strain gauge. A soil pressure box is set between the retaining wall and the slope. The first strain gauge 4, the second strain gauge, and the soil pressure box are all connected to the data acquisition instrument 6. The pressure inside the retaining wall is measured by the second strain gauge, and the soil pressure between the retaining wall and the slope is measured by the soil pressure box. The above measurement data is collected and analyzed by the data acquisition instrument 6, so that a comprehensive evaluation of the stability of the abandoned soil field can be made. The tops of the reference pile 1 and the monitoring pile 2 are fixedly connected with reflective sheets, and the top of the observation pile 5 is installed with a total station. When the strain gauge monitoring data received on a certain soil pile slope is large or a sudden change occurs, the total station at the top of the observation pile 5 is aligned with the measurement reflective sheet installed on the monitoring pile 2 at that location for measurement, and the precise displacement of the monitoring pile 2 is obtained. It should be noted that the first strain gauge 4, data acquisition instrument 6, second strain gauge, soil pressure box, reflector and total station in the above description are all devices with relatively mature application of existing technology. The specific model can be selected according to actual needs. At the same time, the first strain gauge 4, data acquisition instrument 6, second strain gauge, soil pressure box and total station can be powered by built-in power supply or mains power supply. The specific power supply method is selected according to the situation and will not be described here. The monitoring of the earth-pile slope is to first select a stable position outside the slope range to install a reference pile 1 as a stable control point, and then lay a monitoring pile 2 on the slope surface of the slope, and connect a steel rope 3 between the laid monitoring pile 2 and the reference pile 1. When the steel rope 3 is connected, it should be in a taut state with initial tensile stress. The data acquisition instrument 6 has a wireless signal transmission function, which can transmit data to a remote monitoring computer in the distance to achieve long-distance monitoring.When the monitoring data of the first strain gauge 4 and the second strain gauge on a certain soil pile slope are large or abrupt, the total station on the observation pile 5 is aimed at the measuring reflector installed on the monitoring pile 2 to measure and obtain the precise displacement of the monitoring pile 2. The stability of the soil pile slope is evaluated based on the measured data to decide whether to reinforce the slope to avoid landslide disasters.

[0023] The stabilizing rod 71 is a cylindrical cone-head stabilizing rod, that is, the top and bottom ends of the stabilizing rod 71 are both conical in shape, and the top end extends into the monitoring pile 2.

[0024] The monitoring pile 2 is a hollow cylindrical pile, and a notch 21 is vertically arranged on the pile wall on one side of the monitoring pile 2; a sliding hole 72 is respectively arranged on both sides of the stabilizing rod 71, and a movable rod 73 is slidably connected in the sliding hole 72, and the movable rod 73 is slidably connected in the sliding hole 72 in the form of a sliding connection between a hydraulic cylinder and its piston shaft; a stabilizing component 74 is arranged in the monitoring pile 2, and the stabilizing component 74 includes a liquid storage cylinder 741 fixedly connected to the inner wall of the monitoring pile 2, and the upper end of the liquid storage cylinder 741 is internally connected to the inner wall of the monitoring pile 2. The wall is slidably connected with a liquid-pushing piston shaft 743 extending from the top of the liquid storage cylinder 741. The sliding connection between the liquid-pushing piston shaft 743 and the inner wall of the liquid storage cylinder 741 is also a sliding connection between the hydraulic cylinder and its piston shaft. The top of the liquid-pushing piston shaft 743 is connected with a guide limit ring 748 extending from the notch 21 and slidably connected to the outer wall of the monitoring pile 2. The bottom of the liquid storage cylinder 741 is connected with a liquid inlet pipe 742, which extends into the stabilizing rod 71 and is connected to the sliding hole 72. A certain amount of hydraulic oil is stored in the liquid storage cylinder 741. When the monitoring pile 2 needs to be installed on the slope, the monitoring pile 2 and the stabilizing rod 71 are plugged into the slope, pushing the liquid-pushing piston shaft 743 downward. The downward movement of the liquid-pushing piston shaft 743 pushes the hydraulic oil in the liquid storage cylinder 741 to be transported to the two sliding holes 72 through the liquid inlet pipe 742. The excessive hydraulic oil in the sliding hole 72 pushes the movable rod 73 to be plugged into the slope, so that the monitoring pile 2 is stably and vertically plugged into the slope.

[0025] The surface of the movable rod 73 is fixedly connected with a ring-shaped fixed block 746, and the cross-section of the fixed block 746 is an isosceles triangle with the sharp corner facing outward. The movable rod 73 drives the fixed block 746 to be inserted into the slope, thereby increasing the contact area between the stabilizing rod 71 and the slope.

[0026] The extended end of the movable rod 73 is conical, so as to facilitate insertion into the slope.

[0027] The guide limit ring 748 is provided with a pressing handle 750, and the guide limit ring 748 is provided with a through hole 749 for installing the positioning rod 744. The monitoring pile 2 on the side of the slot 21 is also provided with a corresponding limiting hole 22. The positioning rod 744 is inserted into the through hole 749 and the limiting hole 22 to limit the push piston shaft 743 in the monitoring pile 2, ensuring the pressure of the hydraulic oil in the liquid storage cylinder 741, thereby ensuring the stability of the movable rod 73 when inserted into the slope.

[0028] The positioning rod 744 is a positioning rod with external threads, and the through hole 749 and the limiting hole 22 are provided with internal threads matching the positioning rod 744. When the pushing liquid piston shaft 743 is pressed down into place, the positioning rod 744 is screwed to connect the through hole 749 and the limiting hole 22 in series, so that the pushing liquid piston shaft 743 can be limited in the monitoring pile 2.

[0029] The push piston shaft 743 is fixedly connected with a stopper 747 that is slidably connected to the inner wall of the monitoring pile 2. The stopper 747 follows the push piston shaft 743 to slide in the monitoring pile 2 to block the notch 21. The stopper 747 blocks the notch 21 on the monitoring pile 2 to prevent impurities from entering the monitoring pile 2.

[0030] When the present abandoned soil field stability process monitoring device is in use, the monitoring pile 2 and the stabilizing rod 71 are plugged into the slope, the stabilizing rod 71 moves downward to drive the dispersion block 745 to be plugged into the slope, pushing the liquid pushing piston shaft 743 to move downward, and the liquid pushing piston shaft 743 moves downward to push the hydraulic oil in the liquid storage cylinder 741 to be transported to the two sliding holes 72 through the liquid inlet pipe 742. There is too much hydraulic oil in the sliding hole 72, thereby pushing the movable rod 73 and the fixed block 746 to be plugged into the slope, and the positioning rod 744 clamps the liquid pushing piston shaft 743 in the monitoring pile 2 to position the liquid pushing piston shaft 743. The use of the stabilizing rod 71 and the movable rod 73 increases the contact area between the monitoring pile 2 and the slope, so that the monitoring pile 2 can be stably and vertically plugged into the slope.

[0031] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present application should fall within the scope of protection of the present application.

Claims

1. A device for monitoring the stability process of a spoil field, comprising a monitoring pile (2) arranged on a soil pile slope of a spoil field (8), two reference piles (1) and an observation pile (5) arranged on both sides of the monitoring pile (2) at a stable position outside the spoil field (8), the tops of the reference pile (1) and the monitoring pile (2) being flush with each other and a steel wire rope (3) provided with a first strain gauge (4) being connected therebetween, the two steel wire ropes (3) located on both sides of the monitoring pile (2) being in the same straight line; a data acquisition instrument (6) connected to the first strain gauge (4) being installed on the observation pile (5); the characteristics are as follows: The bottom end of the monitoring pile (2) is provided with a stabilizing mechanism (7); the stabilizing mechanism (7) comprises a stabilizing rod (71) fixedly connected to the bottom end of the monitoring pile (2); a plurality of dispersion blocks (745) are vertically fixedly connected to the surface of the stabilizing rod (71); the plurality of dispersion blocks (745) are distributed in a ring shape on the surface of the stabilizing rod (71); and the cross-sectional shape of the dispersion blocks (745) is an isosceles triangle.

2. The device for monitoring the stability process of a spoil dump according to claim 1, characterized in that: The stabilizing rod (71) is a cylindrical cone-head stabilizing rod, that is, the top and bottom ends of the stabilizing rod (71) are both conical in shape, and the top end extends into the monitoring pile (2).

3. The device for monitoring the stability process of a spoil dump according to claim 1, characterized in that: The monitoring pile (2) is a hollow cylindrical pile, and a notch (21) is vertically arranged on the pile wall of one side of the monitoring pile (2); a sliding hole (72) is respectively arranged on both sides of the stabilizing rod (71), and a movable rod (73) is slidably connected in the sliding hole (72); a stabilizing component (74) is arranged in the monitoring pile (2), and the stabilizing component (74) comprises a liquid storage cylinder (741) fixedly connected to the inner wall of the monitoring pile (2), a liquid pushing piston shaft (743) extending from the top of the liquid storage cylinder (741) is slidably connected to the inner wall of the upper end of the liquid storage cylinder (741), and a guide limit ring (748) extending from the notch (21) and slidably connected to the outer wall of the monitoring pile (2) is connected to the top of the liquid pushing piston shaft (743), and the bottom end of the liquid storage cylinder (741) is connected to a liquid inlet pipe (742), and the liquid inlet pipe (742) extends into the stabilizing rod (71) and is connected to the sliding hole (72), and the liquid storage cylinder (741) is filled with hydraulic oil.

4. The device for monitoring the stability process of a spoil dump according to claim 3 is characterized in that: The surface of the movable rod (73) is fixedly connected with annularly distributed fixing blocks (746), and the cross-sectional shape of the fixing blocks (746) is an isosceles triangle.

5. The device for monitoring the stability process of a spoil dump according to claim 3 or 4, characterized in that: The extended end of the movable rod (73) is conical.

6. The device for monitoring the stability process of a spoil dump according to claim 3, characterized in that: The guide limit ring (748) is provided with a pressing handle (750), and the guide limit ring (748) is provided with a through hole (749) for installing the positioning rod (744). The monitoring pile (2) on the side of the notch (21) is also provided with a corresponding limiting hole (22). The positioning rod (744) is inserted into the through hole (749) and the limiting hole (22) to limit the push piston shaft (743) in the monitoring pile (2).

7. The device for monitoring the stability process of a spoil dump according to claim 6, characterized in that: The positioning rod (744) is a positioning rod with external threads, and the through hole (749) and the limiting hole (22) are provided with internal threads matching the positioning rod (744). When the liquid pushing piston shaft (743) is pressed down into place, the positioning rod (744) is screwed to connect the through hole (749) and the limiting hole (22) in series, so that the liquid pushing piston shaft (743) can be limited in the monitoring pile (2).

8. The device for monitoring the stability process of a spoil dump according to claim 3 is characterized in that: The push piston shaft (743) is fixedly connected with a stopper (747) that is slidably connected to the inner wall of the monitoring pile (2). The stopper (747) follows the push piston shaft (743) to slide inside the monitoring pile (2) to cover the notch (21).

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