Acoustic emission monitoring experiment system for loose body landslide process

Abstract

The utility model discloses a loose body landslide process acoustic emission monitoring experiment system, which comprises a landslide device, the landslide device is composed of two cuboid model boxes, the interior of each cuboid model box is hollow, the top and one end of each cuboid model box are open, and the bottoms of the open ends of the two cuboid model boxes are in pivot connection. Wherein one cuboid model box is horizontally placed, the other cuboid model box is in transmission connection with a driving mechanism for driving the cuboid model box to incline, a surface layer is stacked on the bottom surface of the inclined cuboid model box, a loose bed is stacked on the surface layer, and a plurality of cameras are arranged at the top of the inclined cuboid model box. A plurality of acoustic emission sensors are arranged at the bottoms of the two cuboid model boxes and are electrically connected with an acoustic emission processing instrument; according to the scheme, the whole process that the loose body experiences static and creeps to slip can be simulated; the utility model aims to explore the state and the whole process of the loose body before and after sliding and obtain a valuable loose body landslide mechanism and a motion rule.

Description

Technical Field

[0001] The utility model relates to the technical field of loose body sliding experiments, in particular to an acoustic emission monitoring experimental system for a loose body landslide process. Background Art

[0002] As natural conditions deteriorate, natural disasters such as earthquakes, landslides, and mud-rock flows occur frequently. In recent years, domestic and foreign scholars have done a lot of research on the formation mechanism and migration process of landslides. The formation and occurrence of landslides is a very complex natural phenomenon caused by multiple factors such as rainfall, mountain torrents and earthquakes. It is very difficult to describe it with mathematical models. At present, many researchers at home and abroad are trying to use experimental methods to explore the formation mechanism of landslides. Among them, physical model experiments are one of the effective means to study the laws of landslide occurrence. Therefore, in order to simulate and study the sliding process of loose bodies, a loose body landslide process monitoring experimental system is urgently needed. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides an acoustic emission monitoring experimental system for a loose body landslide process, so as to realize a true simulation and research of a loose body landslide process.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] Provided is an acoustic emission monitoring experimental system for a loose body landslide process, comprising a landslide device, wherein the landslide device is composed of two rectangular model boxes, the rectangular model boxes are hollow inside and open at the top and one end, the bottoms of the open ends of the two rectangular model boxes are pivotally connected, one of the rectangular model boxes is horizontally placed, and the other rectangular model box is transmission-connected to a driving mechanism that drives it to tilt, a surface layer is deposited on the bottom surface of the inclined rectangular model box, a loose layer is deposited on the surface layer, a plurality of cameras are arranged on the top of the inclined rectangular model box, a plurality of acoustic emission sensors are arranged on the bottoms of the two rectangular model boxes, and the plurality of acoustic emission sensors are electrically connected to an acoustic emission processing instrument.

[0006] Furthermore, a plurality of cameras and a plurality of acoustic emission sensors are arranged in the length direction of the rectangular model box, a plurality of cameras correspond one-to-one to a plurality of acoustic emission sensors at the bottom of the inclined rectangular model box, and the connecting lines between the corresponding cameras and the acoustic emission sensors are perpendicular to the bottom surface of the inclined rectangular model box.

[0007] Furthermore, the camera is fixed on the crossbar, both ends of which are provided with threaded rods, which are matched with two nuts, and the threaded rod is movably sleeved with two clamps for clamping the side walls of the rectangular model box.

[0008] Furthermore, the driving mechanism includes a vertical pole and a pull rope, one end of the pull rope is connected to the inclined rectangular model box, a fixed pulley is arranged on the top of the vertical pole, the other end of the pull rope passes through the fixed pulley and is connected to a reel, and the reel is rotationally connected to the driving motor.

[0009] Furthermore, two side walls of the inclined rectangular parallelepiped model box are respectively located on the inner sides of two side walls of the horizontally placed rectangular parallelepiped model box.

[0010] Furthermore, the bottom surface of the inclined rectangular parallelepiped model box and the surface layer are bonded by double-sided adhesive tape.

[0011] Furthermore, a plurality of acoustic emission sensors are electrically connected to the acoustic emission processing instrument through a preamplifier.

[0012] Furthermore, the two rectangular parallelepiped model boxes are both transparent boxes.

[0013] The beneficial effects of the utility model are:

[0014] 1. This scheme guides the change of the inclination angle of the rectangular model box through the driving mechanism, thereby changing the inclination angle of the loose layer slope, making its state gradually unstable, and finally triggering a landslide, so that the simulated loose body undergoes the entire process of static, creep to sliding; the acoustic emission sensor and acoustic emission processing instrument are responsible for capturing and analyzing the acoustic emission signals generated during the loose body landslide process, and cooperate with the camera to explore the state and the entire process before and after the loose body slide, and obtain valuable loose body landslide mechanism and movement law.

[0015] 2. The bottom surface and the surface layer of the rectangular model box are bonded by double-sided tape to simulate the slope under natural conditions, so that when the loose layer slides, it slides between the soil and the surface layer, which improves the authenticity of the simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the acoustic emission monitoring experimental system for loose body landslide process.

[0017] Figure 2 It is a cross-sectional view of the inclined rectangular model box.

[0018] Among them, 1. rectangular model box, 2. surface layer, 3. loose layer, 4. camera, 5. acoustic emission sensor, 6. acoustic emission processing instrument, 7. cross bar, 8. threaded rod, 9. nut, 10. clamping claw, 11. vertical pole, 12. pull rope, 13. fixed pulley, 14. reel, 15. driving motor, 16. double-sided tape, and 17. preamplifier. DETAILED DESCRIPTION

[0019] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0020] like Figure 1 and Figure 2 As shown, the acoustic emission monitoring experimental system for the loose body landslide process of the present scheme includes a landslide device, which is composed of two rectangular model boxes 1. The two rectangular model boxes 1 are both transparent boxes. The interior of the rectangular model boxes 1 is hollow and the top and one end are open. The bottoms of the open ends of the two rectangular model boxes 1 are pivotally connected, and the two side walls of the inclined rectangular model boxes 1 are respectively located on the inner sides of the two side walls of the horizontally placed rectangular model box 1. One of the rectangular model boxes 1 is placed horizontally, and the other rectangular model box 1 is transmission-connected to a driving mechanism that drives it to tilt. A surface layer 2 is deposited on the bottom surface of the inclined rectangular model box 1, and the surface layer 2 is bonded to the bottom surface by a double-sided tape 16 to simulate a slope under natural conditions. A loose layer 3 is deposited on the surface layer 2, so that when the loose layer 3 slides, it slides between the soil and the surface layer 2, thereby improving the authenticity of the simulation.

[0021] The driving mechanism includes a vertical pole 11 and a pull rope 12, one end of the pull rope 12 is connected to the inclined rectangular model box 1, a fixed pulley 13 is arranged on the top of the vertical pole 11, the other end of the pull rope 12 passes through the fixed pulley 13 and is connected to the reel 14, and the reel 14 is rotatably connected to the driving motor 15, wherein the driving motor 15 is preferably a stepping motor that can accurately control the angle and speed, so as to realize the precise adjustment of the inclination angle of the rectangular model box 1.

[0022] Two cameras 4 are arranged on the top of the inclined rectangular model box 1, and two acoustic emission sensors 5 are attached to the bottom of the inclined rectangular model box 1. The two cameras 4 and the two acoustic emission sensors 5 are arranged in the length direction of the inclined rectangular model box 1, and the two cameras 4 correspond to the two acoustic emission sensors 5 one by one, and the connecting line between the corresponding cameras 4 and the acoustic emission sensors 5 is perpendicular to the bottom surface of the inclined rectangular model box 1; an acoustic emission sensor 5 is attached to the bottom of the horizontally placed rectangular model box 1, and the three acoustic emission sensors 5 are electrically connected to the acoustic emission processing instrument 6 through the preamplifier 17.

[0023] The camera 4 is fixed to the middle part of the cross bar 7 by a strap, and the front end of the camera 4 faces the bottom surface of the rectangular model box 1. Threaded rods 8 are provided at both ends of the cross bar 7, and two nuts 9 are matched on the threaded rod 8. Two clamping claws 10 for clamping the side wall of the rectangular model box 1 are movably sleeved on the threaded rod 8 located between the two nuts 9.

[0024] In the specific implementation of this scheme, before the start of the test, the inclination angle of the rectangular model box 1 and the initial height of the horizontal plane are preset, and a certain mass of standard sand with a fixed particle size range is evenly bonded and piled on the bottom of the inclined rectangular model box 1 to form a surface layer 2, and then a loose layer 3 is piled on the surface layer 2 to simulate the loose body on the slope terrain under natural conditions; when stacking the standard sand, it is necessary to ensure that the accumulation layer on the slide does not slip; in this way, the entire test process is more biased towards the real situation, and the sliding process of the loose body under actual conditions can be simulated more accurately.

[0025] After the experiment starts, the inclination angle of the inclined slide is gradually increased through the driving mechanism, and its speed is controlled; the loose layer 3 undergoes the entire process of stillness, creep to sliding. When the sliding process of the loose layer 3 is completed, the experiment is stopped and the collection of relevant data is stopped. The change law of the loose layer 3 from stillness to sliding during the change of the inclination angle is obtained through the acoustic emission sensor 5. The acoustic emission sensor 5 and the acoustic emission processing instrument 6 are responsible for capturing and analyzing the acoustic emission signals generated in the entire process of the loose layer 3 from stillness to sliding, and cooperate with the camera 4 to explore the state and the entire process before and after the loose body slides, and obtain valuable loose body landslide mechanism and movement law.

Claims

1. An acoustic emission monitoring experimental system for loose body landslide process, characterized in that: The invention comprises a landslide device, which is composed of two rectangular model boxes, wherein the interior of the rectangular model box is hollow and the top and one end are both open, the bottoms of the open ends of the two rectangular model boxes are pivotally connected, one of the rectangular model boxes is placed horizontally, and the other rectangular model box is transmission-connected with a driving mechanism that drives it to tilt, a surface layer is deposited on the bottom surface of the inclined rectangular model box, a loose layer is deposited on the surface layer, a plurality of cameras are arranged on the top of the inclined rectangular model box, a plurality of acoustic emission sensors are arranged on the bottoms of the two rectangular model boxes, and the plurality of acoustic emission sensors are electrically connected with an acoustic emission processing instrument.

2. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: The plurality of cameras and the plurality of acoustic emission sensors are arranged in the length direction of the rectangular model box, the plurality of cameras correspond one-to-one to the plurality of acoustic emission sensors at the bottom of the inclined rectangular model box, and the connecting lines between the corresponding cameras and the acoustic emission sensors are perpendicular to the bottom surface of the inclined rectangular model box.

3. The acoustic emission monitoring experimental system for loose body landslide process according to claim 2 is characterized in that: The camera is fixed on a crossbar, both ends of which are provided with threaded rods, which are matched with two nuts, and a movable sleeve on the threaded rod located between the two nuts is provided with two clamping claws for clamping the side walls of the rectangular model box.

4. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: The driving mechanism includes a vertical pole and a pull rope, one end of the pull rope is connected to the inclined rectangular model box, a fixed pulley is arranged on the top of the vertical pole, the other end of the pull rope passes through the fixed pulley and is connected to a reel, and the reel is rotationally connected to a driving motor.

5. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: The two side walls of the inclined rectangular parallelepiped model box are respectively located on the inner sides of the two side walls of the horizontally placed rectangular parallelepiped model box.

6. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: The bottom surface of the inclined rectangular parallelepiped model box and the surface layer are bonded by double-sided adhesive tape.

7. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: A plurality of the acoustic emission sensors are electrically connected to the acoustic emission processing instrument via a preamplifier.

8. The acoustic emission monitoring experimental system for loose body landslide process according to claim 1 is characterized in that: The two rectangular parallelepiped model boxes are both transparent boxes.

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