A device for testing the shear strength of landslide soil

Abstract

The application discloses a landslide soil body shearing strength testing device and relates to the field of soil body shearing strength testing.The device comprises a mounting plate, a disc is rotationally arranged in the mounting plate, a horizontal limiting mechanism is arranged on the disc, the horizontal limiting mechanism is connected with a drilling testing mechanism, a plurality of movable supporting mechanisms are arranged below the mounting plate, the movable supporting mechanisms are rotationally connected with a gear ring two arranged on the lower surface of the mounting plate, a support mechanism is fixedly connected to the front side of the mounting plate, and the support mechanism is rotationally connected with the gear ring one and the gear ring two.The device realizes linear movement adjustment of the drilling testing mechanism, greatly expands the test coverage range of the shearing strength of the landslide soil body, ensures that test data are more representative and comprehensive, significantly improves the support stability of the device in the landslide soil body, and provides a solid guarantee for the accuracy of the shearing strength test result.

Description

Technical Field

[0001] This invention relates to the field of soil shear strength testing, and in particular to a device for testing the shear strength of landslide soil. Background Technology

[0002] The cone penetration test is one of the conventional in-situ testing methods in geotechnical engineering investigation. It uses a drop hammer of a certain mass to drive a standard-sized cone probe into the soil layer from a certain free fall distance. The changes in the soil layer are judged based on the number of penetration blows, penetration depth or dynamic penetration resistance, and the engineering properties of the soil are evaluated.

[0003] Patent CN115078129B discloses a bottom hole shearing device and a method for testing the shear strength of soil and rock. The self-drilling shearing device includes an installation component, a lifting component, a drilling component, a support component, and a translation component. The installation component is used to install the lifting component, the drilling component, and the translation component. The lifting component raises or lowers the shearing probe. The drilling component automatically drills holes in the soil and rock. The support component improves the stability and firmness of the first mounting box. The translation component allows for the horizontal movement of the drilling component. The shearing probe of this device has four concave areas of the same shape and size, which ensures the drilling efficiency of the drill bit in gravelly soil. The concave areas near the bottom cylindrical part also facilitate the removal of slag during drilling. The device features intelligent control, eliminating the need for manual control and greatly improving work efficiency. It also improves the accuracy of soil and rock shear strength testing and reduces the influence of human factors on the experimental results during cone penetration testing.

[0004] The above-mentioned technologies have a single method for adjusting the rotation position of the drill bit, which can only achieve linear movement adjustment and cannot select test points in multiple ranges within the circumference. The test range is limited. In addition, the above-mentioned technologies require multiple electric rods for telescopic control and support. When drilling into landslide soil, they cannot be inserted into the soil for positioning, resulting in poor positioning effect. Therefore, we propose a landslide soil shear strength testing device. Summary of the Invention

[0005] The purpose of this invention is to provide a test device for the shear strength of landslide soil, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a landslide soil shear strength testing device, comprising a mounting plate, a disc rotatably disposed within the mounting plate, a horizontal limiting mechanism disposed on the disc, the horizontal limiting mechanism being connected to a drilling testing mechanism, a plurality of movable support mechanisms disposed below the mounting plate, the plurality of movable support mechanisms being rotatably connected to a toothed ring two disposed on the lower surface of the mounting plate, and a bracket mechanism fixedly connected to the front side of the mounting plate, the bracket mechanism being rotatably connected to the toothed ring one and the toothed ring two respectively.

[0007] Preferably, the horizontal limiting mechanism includes a transverse groove 1 that runs through the upper surface of the disc, a transverse groove 2 that runs in front of the transverse groove 1, a screw 1 that is rotatably connected inside the transverse groove 2, and a screw block 1 that is sleeved on the screw 1 and threadedly connected to the screw block 1.

[0008] A fourth motor is embedded in the disc, and the output shaft of the fourth motor is fixedly connected to the first screw.

[0009] A third transverse groove is provided behind the first transverse groove. A transverse bar is fixedly connected inside the third transverse groove, and a sliding block is slidably connected to the outer wall of the transverse bar.

[0010] Preferably, the drilling test mechanism includes a mounting box, the bottom of which is fixedly connected to the sliding block and the screw block;

[0011] A second screw is rotatably connected to one side of the mounting box, and the second screw is connected to the lifting plate by a thread. A vertical rod is fixedly connected to the other side, and the vertical rod is slidably connected to the lifting plate.

[0012] A gear four is fixedly connected to the screw two, and the gear four is located above the lifting plate;

[0013] Motor 2 is fixedly connected to the upper wall of the mounting box. The output shaft of motor 2 is fixedly connected to gear 5, and gear 5 meshes with gear 4.

[0014] A motor is fixedly connected to the upper surface of the lifting plate. The output shaft of the motor is fixedly connected to the drill rod. The drill rod is located below the lifting plate and passes through the mounting box and the transverse groove. A test probe is fixedly connected to the bottom end of the drill rod.

[0015] Preferably, the movable support mechanism includes a hollow tube, the top of which is fixedly connected to the lower surface of the mounting plate, and a caster wheel is fixedly connected to the bottom end of the hollow tube.

[0016] A screw three is rotatably connected inside the hollow tube. The upper end of the screw three is fixedly connected to a gear six, which meshes with the gear ring two.

[0017] The screw is fitted with a screw block and is threadedly connected to the screw block. The screw block is slidably connected to the side wall of the hollow tube.

[0018] The screw block three extends to the outside of the hollow tube in a direction away from the disc and is fixedly connected to a rotating head. The rotating head is rotatably connected to the insertion rod below, and a spiral groove is formed on the outer wall of the insertion rod.

[0019] Preferably, a limiting sleeve is fixedly connected to the outer wall of the hollow tube on one side of the insertion rod, and a limiting head is fixedly provided inside the limiting sleeve, with the limiting head located in the spiral groove.

[0020] Preferably, the mounting plate has movable grooves at the four corners of its upper surface, and guide posts are fixedly connected in the movable grooves. The guide posts are slidably connected to the L-shaped limiting rods.

[0021] A spring is wound around the side wall of the guide column. One end of the spring is fixedly connected to the L-shaped limiting rod, and the other end is fixedly connected to the inner wall of the movable groove.

[0022] A toothed ring is fixedly provided on the upper surface of the disk along the circumferential direction, and the L-shaped limiting rod meshes with the toothed ring.

[0023] Preferably, the support mechanism includes a support, in which a motor and a gear are disposed. The gear is fixedly connected to the output shaft of the motor. The motor is fixed to the upper side wall of the support. The output shaft of the motor passes through the lower side wall of the support and its bottom end is fixedly connected to a gear. The gear meshes with a gear ring. The gear and the gear ring form a gear set through a guide mechanism.

[0024] Preferably, the guiding mechanism includes a fixing block fixedly connected to the front side of the mounting plate. The fixing block is located on the left side of the bracket mechanism. Two guide rods are slidably connected inside the fixing block. Both ends of the two guide rods are fixed to the mounting plate one. One side of the mounting plate one is fixedly connected to the mounting plate two through a cylinder, and the other side is rotatably connected to a gear three, which is located between the mounting plate one and the mounting plate two.

[0025] A pressure rod is slidably installed on the outer wall of the cylinder, and the pressure rod is connected to the L-shaped limiting rod.

[0026] Preferably, the toothed ring is disposed inside the plurality of L-shaped limiting blocks, and the plurality of L-shaped limiting blocks are fixedly connected to the lower surface of the mounting plate.

[0027] Preferably, an arc-shaped inner stop bar is provided on the inner side of the second toothed ring and on the outer side of the L-shaped limiting rod, and an arc-shaped outer stop bar is provided between two adjacent arc-shaped inner stop bars, the arc-shaped outer stop bar being located on the inner side of the second toothed ring.

[0028] Therefore, the present invention employs the above-mentioned landslide soil shear strength testing device, which has the following beneficial effects:

[0029] (1) Through the horizontal limiting mechanism, the screw rod in the second horizontal groove drives the screw block, which, in conjunction with the limiting guide of the sliding block in the third horizontal groove, realizes the linear movement adjustment of the drilling test mechanism; at the same time, with the meshing transmission of the motor, gear, gear and gear ring in the support mechanism, the disc is driven to rotate within the circumference, so that the drilling test mechanism can select test points in multiple dimensions, both in a straight line and in a circle. This breaks through the limitation of the existing technology that can only be adjusted linearly, greatly expands the test coverage of the shear strength of landslide soil, and ensures that the test data is more representative and comprehensive.

[0030] (2) In view of the slippery nature of landslide soil, the motor of the support mechanism drives the gear 2 to mesh with the gear ring 2, which in turn drives the gear 6 and screw 3 of the moving support mechanism to rotate, so that the insertion rod is inserted into the soil in a spiral manner with the help of the spiral groove and the limiting head. Compared with the traditional electric pole support, the positioning method of the insertion rod penetrating into the soil significantly improves the support stability of the device in the landslide soil, effectively reduces the device offset during drilling and testing, and provides a solid guarantee for the accuracy of the shear strength test results.

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0032] Figure 1 This is a front view schematic diagram of an embodiment of a landslide soil shear strength testing device according to the present invention;

[0033] Figure 2 This is a side view of an embodiment of a landslide soil shear strength testing device according to the present invention.

[0034] Figure 3 This is a bottom view schematic diagram of an embodiment of a landslide soil shear strength testing device according to the present invention;

[0035] Figure 4 This is a top view schematic diagram of the connection structure between the mounting plate and the disc in an embodiment of the landslide soil shear strength testing device of the present invention;

[0036] Figure 5 This is a bottom view schematic diagram of the connection structure of mounting plate 1, mounting plate 2 and gear 3 in an embodiment of a landslide soil shear strength testing device of the present invention;

[0037] Figure 6 This is a schematic diagram of the internal structure of the movable support mechanism in an embodiment of a landslide soil shear strength testing device of the present invention;

[0038] Figure 7 This is a schematic diagram of the connection structure of the limiting sleeve and the limiting head in an embodiment of the landslide soil shear strength testing device of the present invention;

[0039] Figure 8This is an embodiment of a landslide soil shear strength testing device of the present invention. Figure 4 A magnified structural diagram at point A;

[0040] Reference numerals: 1. Mounting plate; 2. Disc; 3. Horizontal groove one; 4. Screw one; 5. Screw block one; 6. Drilling test mechanism; 7. Moving support mechanism; 8. Movable groove; 9. Guide column; 10. L-shaped limit rod; 11. Gear ring one; 12. Bracket; 13. Motor one; 14. Gear one; 15. Gear two; 16. Fixing block; 17. Guide rod; 18. Mounting piece one; 19. Cylinder; 20. Mounting piece two; 21. Gear three; 22. Pressure rod; 23. L-shaped limit block; 24. Gear ring two; 25. Horizontal groove three; 26. Crossbar; 27. Sliding block; 2 8. Spring; 29. ​​Arc-shaped inner stop bar; 30. Arc-shaped outer stop bar; 31. Motor 4; 32. Horizontal groove 2; 601. Mounting box; 602. Screw 2; 603. Lifting plate; 604. Gear 4; 605. Gear 5; 606. Vertical rod; 607. Motor 3; 608. Drill rod; 609. Test probe; 610. Motor 2; 701. Hollow tube; 702. Universal wheel; 703. Screw 3; 704. Gear 6; 705. Screw block 3; 706. Rotating head; 707. Insert rod; 708. Spiral groove; 709. Limit sleeve; 710. Limit head. Detailed Implementation

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] Example

[0044] Please see Figures 1-8This invention provides a landslide soil shear strength testing device, including a mounting plate 1. A disc 2 is rotatably connected to the inner side of the mounting plate 1 via a rotating shaft. A horizontal limiting mechanism is provided on the upper surface of the disc 2. The horizontal limiting mechanism is fixedly connected to a drilling testing mechanism 6. Multiple movable support mechanisms 7 are provided below the mounting plate 1. The multiple movable support mechanisms 7 are rotatably connected to a toothed ring 24 provided on the lower surface of the mounting plate 1. A bracket mechanism is fixedly connected to the front side of the mounting plate 1. The bracket mechanism is rotatably connected to the disc 2 and the toothed ring 24 respectively.

[0045] The horizontal limiting mechanism includes a through-type transverse groove 3 on the upper surface of the disc 2, and a through-type transverse groove 32 on the upper surface of the disc 2 in front of the first transverse groove 3. A screw 4 is rotatably connected inside the second transverse groove 32 via a rotating shaft, and a screw block 5 is threadedly connected to the outer wall of the screw 4. A motor 31 is embedded and installed on the upper surface of the disc 2 on the left side of the second transverse groove 32, and the right end of the output shaft of the motor 31 is fixedly connected to the left end of the screw 4.

[0046] Movable grooves 8 are provided at the four corners of the upper surface of the mounting plate 1. Guide posts 9 are fixedly connected to the inner side of the movable grooves 8. L-shaped limiting rods 10 are slidably connected to the outer side of the guide posts 9. A toothed ring 11 is fixedly connected to the upper surface of the disc 2. The outer side of the toothed ring 11 is engaged with the end of the L-shaped limiting rod 10 near the center of the disc 2. Springs 28 are fixedly connected to the opposite sides of the movable grooves 8 and the L-shaped limiting rods 10, located outside the guide posts 9.

[0047] The front surface of the mounting plate 1 is fixedly connected to a bracket mechanism, which includes a bracket 12. A motor 13 is fixedly connected to the inner upper surface of the bracket 12. A gear 14 is fixedly connected to the outer wall of the output shaft of the motor 13. The bottom end of the output shaft of the motor 13 extends through to the bottom of the bracket 12 and is fixedly connected to a gear 2 15.

[0048] A guide mechanism is fixedly connected to the front surface of the mounting plate 1 and to the left of the bracket 12. The guide mechanism includes a fixing block 16. Two guide rods 17 are slidably connected inside the fixing block 16. A mounting piece 18 is fixedly connected to the outer side walls of the two guide rods 17. A cylinder 19 is fixedly connected to the upper surface of the mounting piece 18. A mounting piece 20 is fixedly connected to the top of the cylinder 19. A gear 3 21 is rotatably connected between the mounting piece 18 and the mounting piece 20 via a rotating shaft. A pressure rod 22 is slidably installed on the outer side wall of the cylinder 19. The rear surface of the pressure rod 22 contacts the outer side wall of the L-shaped limiting rod 10. Multiple L-shaped limiting blocks 23 are fixedly connected to the lower surface of the mounting plate 1. A toothed ring 24 is provided on the inner side of the multiple L-shaped limiting blocks 23. The outer side wall of the toothed ring 24 meshes with the outer side wall of the gear 2 15.

[0049] An arc-shaped inner stop 29 is provided on the inner side of the gear ring 24, located outside the multiple L-shaped limit rods 10. An arc-shaped outer stop 30 is functionally connected on the inner side of the gear ring 24, between two adjacent arc-shaped inner stop 29. The device completes a dual action synchronously through the rotation of the gear ring 2: on the one hand, it drives the insertion rod to insert into the soil for positioning; on the other hand, through the switching between the arc-shaped inner and outer stop 29, in conjunction with the linkage of the spring and the L-shaped limit rods, it automatically releases the locking of the disc and completes the meshing of gear 3 with gear 1 and gear ring 1. The entire process does not require manual adjustment of the limit and gear meshing, realizing intelligent linkage of movement limit, positioning fixation and test direction adjustment, reducing manual operation steps and greatly improving work efficiency.

[0050] After the control motor 4 31 starts, its output shaft directly drives the screw 1 4 to rotate inside the transverse groove 2 32. Since the screw block 1 5 is threadedly connected to the screw 1 4 and its bottom is fixed to the mounting box 601 of the drilling test mechanism 6, the screw block 1 5 will move horizontally linearly along the inner sidewall of the transverse groove 2 32. At the same time, the bottom of the mounting box 601 of the drilling test mechanism 6 is also fixedly connected to the sliding block 27 in the transverse groove 3 25. The sliding block 27 slides along the crossbar 26, forming a coordinated limit with the movement of the screw block 1 5, ensuring that the drilling test mechanism 6 moves stably and linearly in the horizontal direction under the dual guidance of the transverse groove 2 32 and the transverse groove 3 25, realizing the precise adjustment of the test point in the straight line direction. After the device moves to the test range and stops, the motor 1 13 is started, and its output shaft synchronously drives the gear 1 14 and gear 2 15 to rotate. Gear 2 15 meshes with the outer sidewall of the gear ring 2 24, driving the gear ring 2 24 to rotate inside multiple L-shaped limit blocks 23. The inner side of the gear ring 24 meshes with the gear 6 704 of the movable support mechanism 7, driving the gear 6 704 and the screw 3 703 to rotate. The downward movement of the screw block 3 705 pushes the insertion rod 707 to be spirally inserted into the soil, thus completing the positioning of the device.

[0051] During the rotation of the gear ring 24, the inner arc-shaped stop bar 29 gradually disengages from the L-shaped limiting rod 10, and the outer arc-shaped stop bar 30 rotates to the outside of the L-shaped limiting rod 10. At this time, the L-shaped limiting rod 10 loses the obstruction of the inner arc-shaped stop bar 29 and moves away from the gear ring 11 along the guide post 9 under the tension of the spring 28, releasing the lock on the gear ring 11. When the L-shaped limiting rod 10 moves, it will squeeze the pressure rod 22. The pressure rod 22 drives the mounting plate 18 and the mounting plate 20 to move horizontally along the guide rod 17 of the fixing block 16 through the cylinder 19, so that the gear 3 21 between the mounting plate 18 and the mounting plate 20 is precisely engaged between the gear 14 and the gear ring 11, forming a gear transmission chain. The motor 13 drives the gear 14 to rotate, and the gear 14 transmits power to the gear ring 11 through the gear 3 21. The gear ring 11 drives the disc 2 to rotate inside the mounting plate 1. At this time, the arc-shaped outer stop bar 30 blocks the L-shaped limit rod 10 from continuing to move, ensuring that gear 3 21, gear 1 14, and gear ring 11 always maintain stable meshing, realizing the circumferential adjustment of the disc 2, thereby driving the drilling test mechanism 6 to switch test points within the circumferential range, and achieving multi-dimensional test coverage in conjunction with linear adjustment.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a drilling test mechanism 6 is provided on the upper surface of the disc 2. The drilling test mechanism 6 includes a mounting box 601. The bottom of the mounting box 601 is fixedly connected to the top of the sliding block 27 and the top of the screw block 5. A screw rod 602 is rotatably connected to the front of the interior of the mounting box 601 via a rotating shaft. A lifting plate 603 is threadedly connected to the outer wall of the screw rod 602. A gear 604 is fixedly connected to the outer wall of the screw rod 602 and above the lifting plate 603. A motor 610 is fixedly connected to the upper surface of the interior of the mounting box 601. A gear 605 is fixedly connected to the bottom end of the output shaft of the motor 610. The outer wall of the gear 605 meshes with the outer wall of the gear 604. A vertical rod 606 is slidably installed at the rear of the interior of the lifting plate 603. The two ends of the vertical rod 606 are fixedly connected to the inner side of the mounting box 601. A motor 607 is fixedly connected to the upper surface of the lifting plate 603. The bottom end of the output shaft of the motor 607 is fixedly connected to a drill rod 608 located below the lifting plate 603. The bottom end of the drill rod 608 passes through the mounting box 601, through the transverse groove 3, and is fixedly connected to a test probe 609.

[0053] When the drilling testing mechanism 6 is working, motor 2 610 is started. The output shaft of motor 2 610 drives gear 5 605 to rotate. Since gear 5 605 is meshed with gear 4 604, the rotation of gear 5 605 drives gear 4 604 to rotate synchronously, which in turn drives screw 2 602 to rotate inside the mounting box 601. During the rotation of screw 2 602, the lifting plate 603, which is threaded to its outer wall, will rise and fall stably along the outer wall of the vertical rod 606, realizing the raising or lowering of the shear probe. When drilling testing is required, motor 3 607 is started. The output shaft of motor 3 607 drives the drill rod 608 to rotate. The test probe 609 at the bottom of the drill rod 608 rotates synchronously with it. Under the lowering action of the lifting plate 603, the test probe 609 gradually penetrates into the landslide soil to complete the drilling and shear strength testing operations. Meanwhile, combined with the rotation adjustment of the disc 2, the drilling test mechanism 6 can move within the circumference of the disc 2, and cooperate with the linear movement of the screw block 5 driven by the screw rod 4 inside the transverse groove 32 to realize multi-dimensional adjustment of the test point in the horizontal direction and expand the test range.

[0054] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the lower surface of the mounting plate 1 is provided with multiple movable support mechanisms 7. The movable support mechanism 7 includes a hollow tube 701, the top of which is fixedly connected to the lower surface of the mounting plate 1, and a universal wheel 702 fixedly connected to the bottom end of the hollow tube 701. A screw rod 703 is rotatably connected to the inside of the hollow tube 701 via a rotating shaft. A gear 704 is fixedly connected to the upper side of the outer wall of the screw rod 703. The outer wall of the gear 704 meshes with the outer wall of the gear ring 24. A screw block 705 is threadedly connected to the outer wall of the screw rod 703 and below the gear 704. The screw block 705 extends from the side away from the disc 2 to the outside of the hollow tube 701 and is fixedly connected to a rotating head 706. The screw block 705 is slidably connected to the hollow tube 701. A rod 707 is rotatably connected to the lower surface of the rotating head 706 via a rotating shaft.

[0055] The outer side wall of the insertion rod 707 is provided with a spiral groove 708. The lower side wall of the hollow tube 701 is fixedly connected to a limiting sleeve 709 located outside the insertion rod 707. The inside of the limiting sleeve 709 is fixedly connected to a limiting head 710 located inside the spiral groove 708.

[0056] When the mobile support mechanism 7 is working, after the device moves to the test position, motor 13 starts and drives gear 2 15 to rotate through the output shaft. Since gear 2 15 meshes with gear ring 2 24, gear ring 2 24 rotates accordingly and drives gear 6 704, which meshes with it, to rotate. Gear 6 704 drives screw 3 703 to rotate inside hollow tube 701. When screw 3 703 rotates, screw block 3 705, which is threaded to its outer wall, slides downward along the inner side of hollow tube 701. Screw block 3 705 drives rotating head 706 to move downward synchronously, and the insertion rod 707 below rotating head 706 descends accordingly. During the descent of insertion rod 707, limiting head 710 inside limiting sleeve 709 is embedded in spiral groove 708 on the outer wall of insertion rod 707. Under the pushing of screw block 3 705 and the cooperation of spiral groove 708 and limiting head 710, insertion rod 707 moves downward while rotating, and finally spirally inserts into the landslide soil. By simultaneously inserting the rods 707 of multiple movable support mechanisms 7 into the soil, a stable support and positioning structure is formed, which greatly improves the positioning firmness of the device during landslide soil testing and avoids device displacement during drilling.

[0057] Therefore, this invention employs the aforementioned landslide soil shear strength testing device to achieve linear movement adjustment of the drilling testing mechanism, enabling the drilling testing mechanism to select test points in multiple dimensions, including straight lines and circles. This overcomes the limitation of existing technologies that can only be adjusted linearly, significantly expanding the testing coverage of landslide soil shear strength and ensuring more representative and comprehensive test data. It also significantly improves the support stability of the device in landslide soil, effectively reducing device offset during drilling and testing, providing a solid guarantee for the accuracy of shear strength test results. Furthermore, it reduces manual operation steps, greatly improving work efficiency; force transmission is efficient and stable, the overall structure is compact, and the linkage logic is clear, extending the service life of the device and reducing maintenance costs.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A device for testing the shear strength of landslide soil, characterized in that: The device includes a mounting plate, a disc rotatably mounted inside the mounting plate, a horizontal limiting mechanism mounted on the disc, the horizontal limiting mechanism being connected to a drilling testing mechanism, multiple movable support mechanisms mounted below the mounting plate, each of the multiple movable support mechanisms being rotatably connected to a toothed ring two mounted on the lower surface of the mounting plate, and a bracket mechanism fixedly connected to the front side of the mounting plate, the bracket mechanism being rotatably connected to a toothed ring one and a toothed ring two respectively; The horizontal limiting mechanism includes a horizontal groove 1 that runs through the upper surface of the disc, a horizontal groove 2 that runs in front of the horizontal groove 1, a screw 1 that is rotatably connected inside the horizontal groove 2, and a screw block 1 that is sleeved on the screw 1 and threadedly connected to the screw block 1. A motor four is embedded in the disc, and the output shaft of the motor four is fixedly connected to the screw one; a horizontal groove three is opened behind the horizontal groove one, and a horizontal bar is fixedly connected inside the horizontal groove three, and a sliding block is slidably connected to the outer wall of the horizontal bar; After the motor starts, since the screw block is threadedly connected to the screw rod and its bottom is fixed to the mounting box of the drilling test mechanism, the screw block will move horizontally and linearly along the inner sidewall of the transverse groove. The horizontal limiting mechanism enables the linear movement adjustment of the drilling test mechanism. At the same time, the bottom of the mounting box of the drilling test mechanism is also fixedly connected to the sliding block in the third transverse groove. The movement of the sliding block and the first screw block forms a cooperative limiting, ensuring that the drilling test mechanism moves stably and linearly in the horizontal direction under the dual guidance of the second and third transverse grooves, and realizing the precise adjustment of the test point in the straight line direction. The support mechanism includes a support, in which a motor and a gear are disposed. The gear is fixedly connected to the output shaft of the motor. The motor is fixed to the upper side wall of the support. The output shaft of the motor passes through the lower side wall of the support and its bottom end is fixedly connected to a gear. The gear meshes with a gear ring. The gear and the gear ring form a gear set through a guide mechanism. The guiding mechanism includes a fixed block fixedly connected to the front side of the mounting plate. The fixed block is located on the left side of the bracket mechanism. Two guide rods are slidably connected inside the fixed block. Both ends of the two guide rods are fixed to the mounting plate one. One side of the mounting plate one is fixedly connected to the mounting plate two through a cylinder, and the other side is rotatably connected to a gear three, which is located between the mounting plate one and the mounting plate two. The motor drives the gear ring to rotate the disk inside the mounting plate, ensuring that the gear three maintains stable meshing with the gear one and the gear ring, thereby adjusting the circumferential direction of the disk and driving the drilling test mechanism to switch test points within the circumferential range.

2. The landslide soil shear strength testing device according to claim 1, characterized in that: The drilling test mechanism includes the mounting box, and the bottom of the mounting box is fixedly connected to the sliding block and the screw block. A second screw is rotatably connected to one side of the mounting box, and the second screw is connected to the lifting plate by a thread. A vertical rod is fixedly connected to the other side, and the vertical rod is slidably connected to the lifting plate. A gear four is fixedly connected to the screw two, and the gear four is located above the lifting plate; Motor 2 is fixedly connected to the upper wall of the mounting box. The output shaft of motor 2 is fixedly connected to gear 5, and gear 5 meshes with gear 4. A motor is fixedly connected to the upper surface of the lifting plate. The output shaft of the motor is fixedly connected to the drill rod. The drill rod is located below the lifting plate and passes through the mounting box and the transverse groove. A test probe is fixedly connected to the bottom end of the drill rod.

3. The landslide soil shear strength testing device according to claim 2, characterized in that: The mobile support mechanism includes a hollow tube, the top of which is fixedly connected to the lower surface of the mounting plate, and a caster wheel is fixedly connected to the bottom of the hollow tube. A screw three is rotatably connected inside the hollow tube. The upper end of the screw three is fixedly connected to a gear six, which meshes with the gear ring two. The screw is fitted with a screw block and is threadedly connected to the screw block. The screw block is slidably connected to the side wall of the hollow tube. The screw block three extends to the outside of the hollow tube in a direction away from the disc and is fixedly connected to a rotating head. The rotating head is rotatably connected to the insertion rod below, and a spiral groove is formed on the outer wall of the insertion rod.

4. The landslide soil shear strength testing device according to claim 3, characterized in that: The hollow tube is fixedly connected to the outer wall of the insertion rod on one side with a limiting sleeve, and a limiting head is fixedly provided inside the limiting sleeve, with the limiting head located in the spiral groove.

5. The landslide soil shear strength testing device according to claim 4, characterized in that: The mounting plate has movable grooves at the four corners of its upper surface. Guide posts are fixedly connected in the movable grooves and are slidably connected to L-shaped limit rods. A spring is wound around the side wall of the guide column. One end of the spring is fixedly connected to the L-shaped limiting rod, and the other end is fixedly connected to the inner wall of the movable groove. The upper surface of the disk is fixedly provided with the toothed ring one along the circumferential direction, and the L-shaped limiting rod meshes with the toothed ring one.

6. The landslide soil shear strength testing device according to claim 5, characterized in that: A pressure rod is slidably installed on the outer wall of the cylinder, and the pressure rod is connected to the L-shaped limiting rod.

7. The landslide soil shear strength testing device according to claim 6, characterized in that: The toothed ring is disposed inside the plurality of L-shaped limiting blocks, and the plurality of L-shaped limiting blocks are fixedly connected to the lower surface of the mounting plate.

8. The landslide soil shear strength testing device according to claim 7, characterized in that: An arc-shaped inner stop bar is provided on the inner side of the second toothed ring and on the outer side of the L-shaped limiting rod. An arc-shaped outer stop bar is provided between two adjacent arc-shaped inner stop bars. The arc-shaped outer stop bar is located on the inner side of the second toothed ring.

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