Soil liquefaction geological disaster demonstration device and use method thereof

Abstract

The invention discloses a soil liquefaction geological disaster demonstration device and a use method thereof, and relates to the technical field of geological disaster demonstration, the soil liquefaction geological disaster demonstration device comprises a base, the upper part of the base is slidably provided with a demonstration box, and the base and the demonstration box are jointly provided with a motion assembly; the first driving unit and the second driving unit are arranged on the base, the rotating disc is rotationally connected with the side face of the base, the movable rod is movably connected with the side face of the rotating disc, the concentric-square-shaped plate is installed on the side face of the demonstration box, the concentric-square-shaped plate is movably connected with the movable rod, and the first driving unit drives the rotating disc to rotate; according to the soil liquefaction geological disaster demonstration device, the motion assembly is arranged, when soil liquefaction geological disaster demonstration is carried out, the motion amplitude of the demonstration box is changed in real time, the irregular motion amplitude can simulate the broadband characteristic of seismic waves, and the experiment result is closer to the actual seismic liquefaction phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of geological disaster demonstration, and in particular to a soil liquefaction geological disaster demonstration device and a use method thereof. Background Art

[0002] Soil liquefaction refers to the phenomenon in which saturated loose sand loses effective stress and experiences a sudden drop in shear strength due to a sharp increase in pore water pressure under dynamic conditions such as earthquakes. Vibration is applied through a vibration table to simulate the excitation of seismic waves. The vibration will cause the sand particles to rearrange and the pore water pressure to increase. When the excess pore water pressure generated by the vibration approaches or exceeds the overlying soil pressure, the soil will liquefy.

[0003] When demonstrating soil liquefaction geological disasters, the demonstrator often manually shakes the carrier to drive the movement of water and sand to perform the demonstration. Since real seismic waves contain multiple frequencies, amplitudes and phases, the resonance response of a single frequency can easily lead to uniform settlement of sand and soil. In addition, the water flow in the carrier is fixed and difficult to change in real time with factors such as seismic vibrations, which can easily affect the authenticity of the demonstration. Therefore, a soil liquefaction geological disaster demonstration device and a method of use are proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art, such as the existence of a single-frequency resonance response, which easily leads to uniform settlement of sand and soil, and the fixed water flow in the carrier, which is difficult to change in real time with factors such as seismic vibration, and easily affects the authenticity of the demonstration work. A soil liquefaction geological disaster demonstration device and its use method are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is connected to the base frame and the movable rod is connected to the base frame by a movable rod, and the movable rod is connected to the base frame by a movable rod.

[0007] The base and the demonstration box are provided with a water level changing component, and the water level changing component includes a water tank installed on the upper part of the base, a second baffle slidingly arranged at the bottom of the water tank, a second pressure block installed at the bottom of the second baffle, an extrusion block movably connected to the upper part of the base, a first pressure block installed on the upper part of the base, a first baffle slidingly arranged on the inner side of the base, and an L-shaped plate installed on the side of the first baffle. The side of the demonstration box is provided with a first open groove, and the bottom of the water tank is provided with a second open groove. When the demonstration box performs reciprocating motion and drives the L-shaped plate to move, it squeezes the first pressure block, and the L-shaped plate drives the first baffle to move up to expose the first open groove for drainage. When the extrusion block moves, it squeezes the second pressure block and drives the second baffle to move to expose the second open groove for adding water. The water level in the demonstration box changes in real time. By switching the water level in real time, the water level fluctuations in real disasters can be simulated, triggering more complex destruction modes, and further enhancing the authenticity of the demonstration.

[0008] The above technical solution further includes:

[0009] A sliding groove is provided on the upper portion of the base, and a first sliding block is slidably arranged inside the sliding groove.

[0010] Rotating wheels are symmetrically installed on the bottom of the demonstration box, which are in contact with the inner bottom of the sliding groove. By switching the water level in real time, water level fluctuations in real disasters can be simulated, triggering more complex destruction modes, and further enhancing the authenticity of the demonstration.

[0011] The first driving unit includes a first servo motor installed on the side of the base, the output shaft of the first servo motor is fixedly connected to the rotating disk, a round rod is installed on the side of the rotating disk, a control box is installed on the end of the round rod away from the rotating disk, and the control box is slidably connected to the movable rod. After the first servo motor is started, it drives the rotating disk, the round rod and the control box to drive the movable rod to rotate.

[0012] The second driving unit includes a second servo motor installed on the inner side of the control box, a threaded rod installed on the output end of the second servo motor, the threaded rod and the control box are rotatably connected, a second sliding block is slidingly provided on the inner side of the control box, the second sliding block is fixedly connected to the movable rod, the threaded rod and the second sliding block are threadedly connected, and when the threaded rod rotates back and forth, it drives the second sliding block and the movable rod to move back and forth.

[0013] Connecting rods are symmetrically installed on the outer side of the circular plate. The two connecting rods are fixedly connected to the demonstration box. The size of the opening of the circular plate is adapted to the size of the movable rod.

[0014] The first baffle is slidably arranged on the inner side of the first open groove, the size of the opening of the first open groove is adapted to the size of the first baffle, a first support plate is installed on the side of the demonstration box, a first telescopic rod is installed on the bottom of the first support plate, and the end of the first telescopic rod away from the first support plate is fixedly connected to the L-shaped plate, the first pressure block is on the movement track of the L-shaped plate, and the first baffle moves up and exposes the first open groove for drainage.

[0015] The second baffle is in contact with the bottom of the water tank. A second support plate is installed at the bottom of the water tank. Second telescopic rods are symmetrically installed on the sides of the second support plate. The two second telescopic rods are fixedly connected to the second baffle.

[0016] A third support plate is installed on the upper part of the demonstration box, and a third telescopic rod is symmetrically installed on the upper part of the third support plate. The two third telescopic rods are fixedly connected to the extrusion block. The second pressure block is above the movement trajectory of the extrusion block. The second baffle moves to expose the second open groove for water adding.

[0017] A method for using a soil liquefaction geological disaster demonstration device, which uses a soil liquefaction geological disaster demonstration device, includes the following steps:

[0018] Step 1: Add water and sand into the demonstration box, and drive the rotating disk to rotate through the first driving unit. The rotating disk rotates through the movable rod and drives the reciprocating motion. At the same time, the circular plate drives the demonstration box to reciprocate to perform a soil liquefaction geological disaster demonstration;

[0019] Step 2: The second driving unit drives the movable rod to move, and adjusts the distance between the movable rod and the center of the rotating disk. The movement amplitude of the demonstration box changes with the distance between the movable rod and the center of the rotating disk.

[0020] Step 3: When the demonstration box reciprocates, the L-shaped plate squeezes the first pressure block and opens the first opening slot for drainage. When the control box moves, the second pressure block is squeezed to drive the second baffle to move and expose the second opening slot for water addition.

[0021] The present invention has the following beneficial effects:

[0022] 1. In the present invention, by providing a motion component, the demonstration box changes its motion amplitude in real time when it reciprocates to drive water and sand to demonstrate soil liquefaction geological disasters. The irregular motion amplitude can simulate the broadband characteristics of seismic waves, making the experimental results closer to actual earthquake liquefaction phenomena.

[0023] 2. In the present invention, a water level changing component is provided to make the water level in the demonstration box change in real time. The rising water level will reduce the effective stress between sand particles, making the sand more likely to liquefy under the action of vibration. The rapid drop in water level may cause negative pore water pressure in the sand, changing the shear strength of the sand. By switching the water level in real time, the water level fluctuations in real disasters can be simulated, triggering more complex damage modes, and further enhancing the authenticity of the demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a soil liquefaction geological disaster demonstration device and its use method proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the first cross-sectional structure of the overall side surface of the present invention;

[0026] Figure 3 This is a second cross-sectional structural diagram of the overall side surface of the present invention;

[0027] Figure 4 Schematic diagram of the overall top structure of the present invention;

[0028] Figure 5 for Figure 2 A schematic diagram of the structure at center A;

[0029] Figure 6 for Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0030] Figure 7 for Figure 3 A magnified schematic diagram of the structure at point C in the middle;

[0031] Figure 8 for Figure 3 Enlarged schematic diagram of the structure at point D in the middle.

[0032] In the figure: 1. base; 2. demonstration box; 3. sliding groove; 4. first sliding block; 5. rotating wheel; 6. first servo motor; 7. rotating disk; 8. round rod; 9. control box; 10. second servo motor; 11. threaded rod; 12. second sliding block; 13. movable rod; 14. connecting rod; 15. first pressure block; 16. first opening groove; 17. first baffle; 18. first support plate; 19. first telescopic rod; 20. L-shaped plate; 21. water tank; 22. second opening groove; 23. second support plate; 24. second telescopic rod; 25. second baffle; 26. second pressure block; 27. third support plate; 28. third telescopic rod; 29. squeezing block; 30. circular plate. DETAILED DESCRIPTION

[0033] 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.

[0034] Example 1

[0035] like Figure 1 - Figure 8 As shown, a soil liquefaction geological disaster demonstration device proposed by the present invention includes a base 1, a demonstration box 2 is slidably provided on the upper part of the base 1, and a motion component is commonly provided on the base 1 and the demonstration box 2, the motion component includes a first driving unit and a second driving unit provided on the base 1, a rotating disk 7 rotatably connected to the side of the base 1, a movable rod 13 movably connected to the side of the rotating disk 7, and a circular plate 30 installed on the side of the demonstration box 2, the circular plate 30 and the movable rod 13 are movably connected, the first driving unit drives the rotating disk 7 to rotate, the rotation of the rotating disk 7 drives the movable rod 13 to rotate, the rotation of the movable rod 13 drives the demonstration box 2 to reciprocate through the circular plate 30, the second driving unit drives the movable rod 13 to adjust the distance from the center of the rotating disk 7 in real time, the motion amplitude of the demonstration box 2 changes with the distance between the movable rod 13 and the center of the rotating disk 7, the motion amplitude of the demonstration box 2 is changed in real time, and the irregular motion amplitude can simulate the broadband characteristics of seismic waves, so that the experimental results are closer to the actual earthquake liquefaction phenomenon;

[0036] A water level changing assembly is provided on the base 1 and the demonstration box 2, which includes a water tank 21 installed on the upper part of the base 1, a second baffle 25 slidingly arranged at the bottom of the water tank 21, a second pressure block 26 installed at the bottom of the second baffle 25, an extrusion block 29 movably connected to the upper part of the base 1, a first pressure block 15 installed on the upper part of the base 1, a first baffle 17 slidingly arranged on the inner side of the base 1, and an L-shaped plate 20 installed on the side of the first baffle 17. A first opening groove 16 is provided on the side of the demonstration box 2, and a second opening groove 22 is provided at the bottom of the water tank 21. When the demonstration box 2 reciprocates and drives the L-shaped plate 20 to move, it squeezes the first pressure block 15, and the L-shaped plate 20 drives the first baffle 17 to move upward to expose the first opening groove 16 for drainage. When the extrusion block 29 moves, it squeezes the second pressure block 26 and drives the second baffle 25 to move to expose the second opening groove 22 for water addition. The water level in the demonstration box 2 changes in real time. By switching the water level in real time, water level fluctuations in real disasters can be simulated, triggering more complex damage modes, and further enhancing the authenticity of the demonstration.

[0037] A sliding groove 3 is provided on the upper portion of the base 1 , and a first sliding block 4 is slidably provided inside the sliding groove 3 .

[0038] Rotating wheels 5 are symmetrically installed at the bottom of the demonstration box 2. The rotating wheels 5 are in contact with the inner bottom of the sliding groove 3. By switching the water level in real time, the water level fluctuations in real disasters can be simulated, triggering more complex destruction modes, and further enhancing the authenticity of the demonstration.

[0039] The first driving unit includes a first servo motor 6 installed on the side of the base 1, the output shaft of the first servo motor 6 is fixedly connected to the rotating disk 7, a round rod 8 is installed on the side of the rotating disk 7, and a control box 9 is installed on the end of the round rod 8 away from the rotating disk 7. The control box 9 is slidably connected to the movable rod 13. After the first servo motor 6 is started, it drives the rotating disk 7, the round rod 8 and the control box 9 to drive the movable rod 13 to rotate.

[0040] The second driving unit includes a second servo motor 10 installed on the inner side of the control box 9, and a threaded rod 11 is installed on the output end of the second servo motor 10. The threaded rod 11 is rotatably connected to the control box 9, and a second sliding block 12 is slidingly provided on the inner side of the control box 9. The second sliding block 12 is fixedly connected to the movable rod 13, and the threaded rod 11 is threadedly connected to the second sliding block 12. When the threaded rod 11 rotates back and forth, it drives the second sliding block 12 and the movable rod 13 to move back and forth.

[0041] Connecting rods 14 are symmetrically mounted on the outer side of the circular plate 30 . Both connecting rods 14 are fixedly connected to the demonstration box 2 . The size of the opening of the circular plate 30 matches the size of the movable rod 13 .

[0042] In this embodiment, when a soil liquefaction geological disaster demonstration is required, water and sand are added to the demonstration box 2, and then the first servo motor 6 is started. The rotating disk 7 is driven to rotate by the first servo motor 6. When the rotating disk 7 rotates, the movable rod 13 is driven to rotate through the round rod 8 and the control box 9. When the movable rod 13 rotates, the circular plate 30 and the connecting rod 14 are driven to reciprocate, so that the demonstration box 2 reciprocates along the demonstration box 2 through the first sliding block 4 and the rotating wheel 5, thereby driving the water and sand in the demonstration box 2 to move, and performing a soil liquefaction geological disaster demonstration. At the same time, the second servo motor 10 can be started, and the threaded rod 11 can be driven to rotate back and forth by the second servo motor 10. When the threaded rod 11 rotates back and forth, it can drive the second sliding block 12 to move back and forth, thereby driving the movable rod 13 to move back and forth, thereby adjusting the distance between the movable rod 13 and the center of the rotating disk 7. When the distance between the movable rod 13 and the center of the rotating disk 7 is farther, the reciprocating motion amplitude of the circular plate 30 is greater. When the distance between the movable rod 13 and the center of the rotating disk 7 is closer, the reciprocating motion amplitude of the circular plate 30 is smaller. Therefore, the reciprocating motion amplitude of the demonstration box 2 changes in real time.

[0043] Example 2

[0044] like Figure 1 - Figure 8As shown, based on the first embodiment, the first baffle 17 is slidably arranged on the inner side of the first opening groove 16, the size of the opening of the first opening groove 16 is adapted to the size of the first baffle 17, a first support plate 18 is installed on the side of the demonstration box 2, and a first telescopic rod 19 is installed at the bottom of the first support plate 18. The end of the first telescopic rod 19 away from the first support plate 18 is fixedly connected to the L-shaped plate 20, the first pressure block 15 is on the movement trajectory of the L-shaped plate 20, and the first baffle 17 moves up and exposes the first opening groove 16 for drainage.

[0045] The second baffle 25 contacts the bottom of the water tank 21 . A second support plate 23 is installed at the bottom of the water tank 21 . Second telescopic rods 24 are symmetrically installed on the sides of the second support plate 23 . The two second telescopic rods 24 are fixedly connected to the second baffle 25 .

[0046] A third support plate 27 is installed on the upper part of the demonstration box 2, and a third telescopic rod 28 is symmetrically installed on the upper part of the third support plate 27. The two third telescopic rods 28 are fixedly connected to the extrusion block 29. The second pressure block 26 is on the movement trajectory of the extrusion block 29. The second baffle 25 moves and exposes the second open groove 22 for water adding.

[0047] In this embodiment, when the demonstration box 2 reciprocates to demonstrate the soil liquefaction geological disaster, the demonstration box 2 can drive the L-shaped plate 20 to move, so that the L-shaped plate 20 squeezes the inclined surface of the first pressure block 15. At this time, the L-shaped plate 20 moves upward through the telescopic properties of the first telescopic rod 19, thereby driving the first baffle 17 to move upward and exposing the first open groove 16. At this time, a part of the water flow in the demonstration box 2 can be discharged through the first open groove 16. When the L-shaped plate 20 no longer squeezes the first pressure block 15, the first telescopic rod 19 in the retracted state drives the first baffle 17 to reset through the L-shaped plate 20, re-blocks the first open groove 16, and can drive the third support plate 27 and the extrusion block 29 to move when the demonstration box 2 moves. When the extrusion block 29 moves, it pushes the second pressure block 26 , thereby driving the second baffle 25 to move and expose the second open groove 22. At this time, part of the water flow in the water tank 21 is discharged into the demonstration box 2. At this time, the second telescopic rod 24 is retracted. When the second telescopic rod 24 is retracted to the limit, the squeezing block 29 can no longer push the second pressure block 26. At this time, the squeezing block 29 squeezes the inclined surface of the second pressure block 26 and moves downward, and the third telescopic rod 28 is retracted. When the squeezing block 29 moves to the other side of the second pressure block 26, the squeezing block 29 is no longer in contact with the second pressure block 26. The second telescopic rod 24 in the retracted state is reset, thereby driving the second baffle 25 to reset and re-block the second open groove 22. In this way, when the demonstration box 2 reciprocates to perform the soil liquefaction geological disaster demonstration, the water level changes in real time.

[0048] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A soil liquefaction geological disaster demonstration device, comprising a base (1), characterized in that: A demonstration box (2) is slidably provided on the upper part of the base (1), and a motion component is commonly provided on the base (1) and the demonstration box (2), the motion component comprising a first driving unit and a second driving unit provided on the base (1), a rotating disk (7) rotatably connected to the side of the base (1), a movable rod (13) movably connected to the side of the rotating disk (7), and a circular plate (30) installed on the side of the demonstration box (2), wherein the circular plate (30) is movably connected to the movable rod (13), the first driving unit drives the rotating disk (7) to rotate, the rotation of the rotating disk (7) drives the movable rod (13) to rotate, the rotation of the movable rod (13) drives the demonstration box (2) to reciprocate through the circular plate (30), the second driving unit drives the movable rod (13) to adjust the distance from the center of the rotating disk (7) in real time, and the movement amplitude of the demonstration box (2) changes with the distance between the movable rod (13) and the center of the rotating disk (7); The base (1) and the demonstration box (2) are provided with a water level changing assembly, which comprises a water tank (21) installed on the upper part of the base (1), a second baffle (25) slidably arranged at the bottom of the water tank (21), a second pressure block (26) installed at the bottom of the second baffle (25), an extrusion block (29) movably connected to the upper part of the base (1), a first pressure block (15) installed on the upper part of the base (1), a first baffle (17) slidably arranged on the inner side of the base (1), and an L-shaped plate (20) installed on the side of the first baffle (17). A first opening groove (16) is provided on the side of the water tank (2), and a second opening groove (22) is provided on the bottom of the water tank (21). When the demonstration box (2) makes a reciprocating motion and drives the L-shaped plate (20) to move, it squeezes the first pressure block (15). The L-shaped plate (20) drives the first baffle (17) to move upward to expose the first opening groove (16) for water drainage. When the squeezing block (29) moves, it squeezes the second pressure block (26) and drives the second baffle (25) to move to expose the second opening groove (22) for water addition. The water level in the demonstration box (2) changes in real time.

2. The soil liquefaction geological disaster demonstration device according to claim 1, characterized in that: A sliding groove (3) is provided on the upper portion of the base (1), and a first sliding block (4) is slidably provided inside the sliding groove (3).

3. A soil liquefaction geological disaster demonstration device according to claim 2, characterized in that The bottom of the demonstration box (2) is symmetrically provided with a rotating wheel (5), and the rotating wheel (5) is in contact with the inner bottom of the sliding groove (3).

4. The soil liquefaction geological disaster demonstration device according to claim 1, characterized in that: The first driving unit comprises a first servo motor (6) mounted on the side of a base (1), an output shaft of the first servo motor (6) being fixedly connected to a rotating disk (7), a round rod (8) being mounted on the side of the rotating disk (7), a control box (9) being mounted on one end of the round rod (8) away from the rotating disk (7), and the control box (9) being slidably connected to a movable rod (13).

5. The soil liquefaction geological disaster demonstration device according to claim 4, characterized in that: The second driving unit includes a second servo motor (10) installed on the inner side of a control box (9), a threaded rod (11) installed on the output end of the second servo motor (10), the threaded rod (11) and the control box (9) are rotatably connected, a second sliding block (12) is slidably provided on the inner side of the control box (9), the second sliding block (12) is fixedly connected to a movable rod (13), and the threaded rod (11) and the second sliding block (12) are threadedly connected.

6. The soil liquefaction geological disaster demonstration device according to claim 5, characterized in that: Connecting rods (14) are symmetrically installed on the outer side of the circular plate (30), and the two connecting rods (14) are fixedly connected to the demonstration box (2). The size of the opening of the circular plate (30) is adapted to the size of the movable rod (13).

7. The soil liquefaction geological disaster demonstration device according to claim 1, characterized in that: The first baffle (17) is slidably arranged on the inner side of the first opening groove (16), and the size of the opening of the first opening groove (16) is adapted to the size of the first baffle (17). A first support plate (18) is installed on the side of the demonstration box (2), and a first telescopic rod (19) is installed on the bottom of the first support plate (18). The end of the first telescopic rod (19) away from the first support plate (18) is fixedly connected to the L-shaped plate (20), and the first pressure block (15) is located on the movement track of the L-shaped plate (20).

8. The soil liquefaction geological disaster demonstration device according to claim 1, characterized in that: The second baffle (25) contacts the bottom of the water tank (21), a second support plate (23) is installed at the bottom of the water tank (21), and second telescopic rods (24) are symmetrically installed on the side of the second support plate (23), and the two second telescopic rods (24) are fixedly connected to the second baffle (25).

9. The soil liquefaction geological disaster demonstration device according to claim 8, characterized in that: A third support plate (27) is installed on the upper part of the demonstration box (2), and a third telescopic rod (28) is symmetrically installed on the upper part of the third support plate (27). The two third telescopic rods (28) are fixedly connected to the extrusion block (29), and the second pressure block (26) is located on the movement track of the extrusion block (29).

10. A method for using a soil liquefaction geological disaster demonstration device, using the soil liquefaction geological disaster demonstration device according to claim 1, characterized in that: The steps include: Step 1: Add water and sand into the demonstration box (2), and drive the rotating disk (7) to rotate through the first driving unit. The rotating disk (7) rotates through the movable rod (13) and drives the reciprocating motion. At the same time, the circular plate (30) drives the demonstration box (2) to reciprocate, and a soil liquefaction geological disaster demonstration is performed; Step 2: The second driving unit drives the movable rod (13) to move, and adjusts the distance between the movable rod (13) and the center of the rotating disk (7). The movement amplitude of the demonstration box (2) changes with the distance between the movable rod (13) and the center of the rotating disk (7); Step 3: When the demonstration box (2) reciprocates, the L-shaped plate (20) squeezes the first pressure block (15) and opens the first opening slot (16) to drain water. When the control box (9) moves, the second pressure block (26) is squeezed to drive the second baffle (25) to move and expose the second opening slot (22) to add water.

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