Soil root system drawing and shearing integrated testing device

Abstract

The invention discloses a soil root system drawing and shearing integrated testing device which comprises a base, a multi-direction inclination adjusting simulation mechanism, a drawing testing mechanism and a shearing testing mechanism, an adjusting table is fixedly arranged in the middle of the base, the middle of the adjusting table is hollow, a transverse inclined ring is rotatably arranged on the inner side of the adjusting table, and a longitudinal inclined disc is rotatably arranged in the transverse inclined ring; four groups of first brackets for fixing bolts are arranged on the base in a surrounding manner, first electric telescopic rods are rotationally arranged on the first brackets on the two sides, second electric telescopic rods are rotationally arranged on the first brackets on the front and back sides, a drawing test mechanism is arranged on the longitudinal swash plate, and a shearing test mechanism is arranged on the longitudinal swash plate; the first electric telescopic rod and the second electric telescopic rod stretch out and draw back to drive the transverse inclined ring and the longitudinal inclined disc to conduct transverse inclined adjustment and longitudinal inclined adjustment correspondingly, the third electric telescopic rod and the fourth electric telescopic rod are fixed to the upper portion and the lower portion of the extension frame correspondingly, and drawing and shearing integration is effectively achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plant root system testing, and in particular to a soil root system pulling and shearing integrated testing device. Background Art

[0002] The soil root pull-out shear test is a test method used to study the interaction between plant roots and soil. It is mainly used to evaluate the reinforcing effect of plant roots on soil, determine the interface mechanical properties between roots and soil, and provide data support for engineering applications such as ecological slope protection and soil erosion control. By applying vertical upward pull-out force or horizontal shear force to the plant roots buried in the soil, the displacement, tension and other parameters of the roots under different stress states are measured to analyze the interaction relationship between the roots and the soil. Pull-out force refers to the force that acts vertically upward on the roots in the soil root pull-out shear test to try to pull the roots out of the soil. Shear force is a force that acts on an object to cause relative displacement of the object. In the soil root pull-out shear test, shear force mainly refers to the force acting between the roots and the soil in the horizontal direction, which will cause relative sliding between the roots and the soil;

[0003] The invention patent with application number 202111473553.5 discloses an integrated test device for root pulling and shearing of soil. The pulling device and container are matched, and the filling material that meets the experimental requirements is set in the container to simulate the soil with corresponding parameters. The filling material wraps the test root system, so as to obtain the pulling test data to simulate the reinforcement effect of the plant root system on the corresponding soil in the real scene. Compared with the existing experimental means, a simple and efficient experimental device is provided. The external action mechanism is matched with the container that can be upset, and then the filling material that meets the experimental requirements is set in the container to simulate the soil with corresponding parameters. The shear force and displacement changes during the shearing process are obtained, and the shear strength of the root-soil complex is obtained to simulate the reinforcement effect of the plant root system under the corresponding conditions in the real scene on the soil under different environments. By setting a limit structure and a locking structure that are easy to disassemble, the test box as a container can be quickly disassembled and positioned. While ensuring a more convenient and efficient disassembly and assembly process, it can also have a better fixing effect to avoid large displacement during the pulling process and affect the experimental results.

[0004] However, in the above-mentioned integrated pulling-out and shearing test device for soil roots, a rotating frame is used to rotate, and when simulating the effect of slope on the roots in the pulling-out test on the equipment, it can only be tilted in one direction, and it is impossible to tilt in multiple directions for simulation. The above-mentioned integrated pulling-out and shearing test device for soil roots only has a container and a pulling device for accommodating the test roots and placed horizontally, and lacks the shear force testing function for the soil roots, making it impossible to perform an integrated pulling-out and shearing test on the soil roots. Therefore, the present invention proposes an integrated pulling-out and shearing test device for soil roots to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to propose an integrated testing device for soil root pulling and shearing, which drives the lateral tilt ring and the longitudinal tilt plate to perform lateral tilt adjustment and longitudinal tilt adjustment respectively through the extension of the first electric telescopic rod and the second electric telescopic rod, thereby realizing multi-directional tilt simulation of the influence of slope on the root system of the pulling test. The third electric telescopic rod and the fourth electric telescopic rod are respectively fixed on the upper and lower parts of the extension frame, thereby effectively realizing the integration of the pulling and shearing, and facilitating the adjustment of the height of the shear force test.

[0006] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a soil root pulling and shearing integrated testing device, including a base, a multi-directional tilt adjustment simulation mechanism, a pulling test mechanism and a shearing test mechanism, the multi-directional tilt adjustment simulation mechanism includes an adjusting platform, a transverse tilt ring, a longitudinal tilt disk, a first bracket, a first electric telescopic rod and a second electric telescopic rod, an adjusting platform is fixedly provided in the middle of the base, the adjusting platform is hollow in the middle, a transverse tilt ring is rotatably provided on the inner side of the adjusting platform, the transverse tilt ring is connected to the adjustment platform bearing on both sides, a longitudinal tilt disk is rotatably provided in the transverse tilt ring, and the longitudinal tilt disk is connected to the transverse tilt ring bearing at the front and rear, a first bracket is used to surround the fixing bolt on the base, the first bracket is provided with four groups, a first electric telescopic rod is rotatably provided on the first brackets on both sides, a second electric telescopic rod is rotatably provided on the first brackets at the front and rear, a pulling test mechanism is provided on the longitudinal tilt disk, and a shearing test mechanism is provided on the longitudinal tilt disk.

[0007] A further improvement is that the telescopic end of the first electric telescopic rod is hingedly connected to both sides of the transverse tilting ring, and the telescopic end of the second electric telescopic rod is hingedly connected to the longitudinal tilting plate front and back.

[0008] Further improvements are: the pulling test mechanism includes a second bracket, a screw, a motor, a threaded sleeve, an extension frame, a third electric telescopic rod and a clamping block, a second bracket is fixedly provided in the middle of the rear side of the longitudinal inclined plate, a screw is rotatably provided in the middle of the front side of the second bracket, a motor is fixedly provided in the middle of the top of the second bracket, the output end of the motor is drivingly connected to the screw, a threaded sleeve is provided on the screw thread, an extension frame is fixedly provided on the front side of the threaded sleeve, a third electric telescopic rod is symmetrically fixedly provided on the extension frame, the telescopic end of the third electric telescopic rod is tilted upward and fixedly provided with a clamping block, and a shear test mechanism is provided below the extension frame.

[0009] A further improvement is that a slide bar is symmetrically fixed in front of the second bracket, through holes are symmetrically opened on both sides of the threaded sleeve, and the slide bar slides through the through holes.

[0010] Further improvement is: a test box is fixed in the middle of the longitudinal tilting plate, a slide groove is symmetrically opened on the top of the test box, a box cover is inserted into the top of the test box by sliding along the slide groove, a pulling hole is opened in the middle of the box cover, and the test box corresponds to the upper and lower positions of the extension frame.

[0011] A further improvement is that the shear test mechanism includes a lifting ring, a fourth electric telescopic rod and a test block, a lifting ring is fixedly provided under the extension frame, fourth electric telescopic rods are symmetrically fixedly provided on both sides of the lifting ring, and a test block is fixedly provided at the telescopic end of the fourth electric telescopic rod.

[0012] A further improvement is that a pressure sensor is embedded and fixed in the middle of the inner side of the test block.

[0013] A further improvement is that: horizontal bubble tubes are fixedly arranged around the longitudinal inclined disk, and four groups of horizontal bubble tubes are arranged around it.

[0014] The beneficial effects of the present invention are as follows: the present invention drives the lateral tilt ring and the longitudinal tilt plate to perform lateral tilt adjustment and longitudinal tilt adjustment respectively through the extension and retraction of the first electric telescopic rod and the second electric telescopic rod, thereby realizing the influence of the pull-out test on the root system by simulating the slope in multiple directions. The third electric telescopic rod and the fourth electric telescopic rod are respectively fixed on the upper and lower parts of the extension frame, thereby effectively realizing the integration of the pulling shears, and facilitating the adjustment of the height of the shear force test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall front view of the present invention;

[0016] Figure 2 A top view of the longitudinally inclined disk of the present invention;

[0017] Figure 3 It is a front cross-sectional view of the test box of the present invention;

[0018] Figure 4 A top view of a threaded sleeve of the present invention;

[0019] Figure 5 It is a three-dimensional schematic diagram of the tilted state of the longitudinal tilted disk of the present invention.

[0020] Among them: 1. base; 2. adjustment table; 3. horizontal tilting ring; 4. longitudinal tilting plate; 5. first bracket; 6. first electric telescopic rod; 7. second electric telescopic rod; 8. second bracket; 9. screw; 10. motor; 11. threaded sleeve; 12. extension frame; 13. third electric telescopic rod; 14. clamping block; 15. slide rod; 16. through hole; 17. test box; 18. slide groove; 19. box cover; 20. drawing groove; 21. lifting ring; 22. fourth electric telescopic rod; 23. test block; 24. pressure sensor; 25. horizontal bubble tube. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0022] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present embodiment provides a soil root pulling and shearing integrated testing device, including a base 1, a multi-directional tilt adjustment simulation mechanism, a pulling test mechanism and a shearing test mechanism, the multi-directional tilt adjustment simulation mechanism including an adjusting platform 2, a transverse tilt ring 3, a longitudinal tilt disk 4, a first bracket 5, a first electric telescopic rod 6 and a second electric telescopic rod 7, an adjusting platform 2 is fixedly provided in the middle of the base 1, the adjusting platform 2 is hollow in the middle, a transverse tilt ring 3 is rotatably provided on the inner side of the adjusting platform 2, the transverse tilt ring 3 is connected to the adjusting platform 2 bearing on both sides, a longitudinal tilt disk 4 is rotatably provided in the transverse tilt ring 3, and the longitudinal tilt disk 4 is connected to the transverse tilt ring 3 bearing front and rear, a first bracket 5 for surrounding the fixing bolt is provided on the base 1, four groups of the first bracket 5 are provided, first electric telescopic rods 6 are rotatably provided on the first brackets 5 on both sides, and the front and rear first A second electric telescopic rod 7 is rotatably provided on the bracket 5, the telescopic end of the first electric telescopic rod 6 is hingedly connected to the two sides of the lateral tilting ring 3, and the telescopic end of the second electric telescopic rod 7 is hingedly connected to the front and rear of the longitudinal tilting disk 4. When it is necessary to drive the soil root system to tilt and simulate the slope of the slope, the first electric telescopic rod 6 is telescoped in opposite directions on both sides to drive the lateral tilting ring 3 to be adjusted laterally in the adjustment platform 2, and the second electric telescopic rod 7 is telescoped in opposite directions in the front and rear to drive the longitudinal tilting disk 4 to rotate longitudinally, so as to facilitate driving the soil root system in the test box 17 to be adjusted in multiple directions as needed, and simulate the slope of multiple directions, thereby solving the problem that it can only tilt in one direction and cannot simulate the tilting in multiple directions. A pulling test mechanism is provided on the longitudinal tilting disk 4, and a shearing test mechanism is provided on the longitudinal tilting disk 4.

[0023] The pulling test mechanism includes a second bracket 8, a screw rod 9, a motor 10, a threaded sleeve 11, an extension frame 12, a third electric telescopic rod 13 and a clamping block 14. The second bracket 8 is fixedly provided in the middle of the rear side of the longitudinal inclined disk 4, and a screw rod 9 is rotatably provided in the middle of the front side of the second bracket 8. A motor 10 is fixedly provided in the middle of the top of the second bracket 8. The output end of the motor 10 is drivingly connected to the screw rod 9. A threaded sleeve 11 is provided on the screw rod 9. An extension frame 12 is fixedly provided on the front side of the threaded sleeve 11. A third electric telescopic rod 13 is symmetrically fixed on the extension frame 12. The telescopic end of the third electric telescopic rod 13 is tilted upward and fixedly provided with a clamping block 14. A shear test mechanism is provided below the extension frame 12. When a pulling test is performed, the third electric telescopic rod 13 is extended to drive the clamping block 14 to move toward each other to clamp the upper end of the root system. Then the motor 10 is started to drive the screw 9 to rotate to drive the threaded sleeve 11 and the extension frame 12 to rise for a pulling test.

[0024] A slide bar 15 is symmetrically fixed in front of the second bracket 8, and through holes 16 are symmetrically opened on both sides of the threaded sleeve 11. The slide bar 15 slides through the through holes 16 to ensure that the threaded sleeve 11 drives the extension frame 12 to move up and down while maintaining stability.

[0025] A test box 17 is fixedly provided in the middle of the longitudinal tilting plate 4, and a slide groove 18 is symmetrically provided on the top of the test box 17. A box cover 19 is slidably inserted along the slide groove 18 on the top of the test box 17, and a drawing groove 20 is provided in the middle of the box cover 19. The test box 17 corresponds to the extension frame 12 in the upper and lower positions, so that the soil foundation is conveniently placed in the test box 17 and buried in the soil.

[0026] The shear test mechanism includes a lifting ring 21, a fourth electric telescopic rod 22 and a test block 23. The lifting ring 21 is fixedly provided under the extension frame 12, and the fourth electric telescopic rods 22 are symmetrically fixedly provided on both sides of the lifting ring 21. The test block 23 is fixedly provided at the telescopic end of the fourth electric telescopic rod 22, and a pressure sensor 24 is embedded and fixedly provided in the middle of the inner side of the test block 23. When a shear force test is required, a group of fourth electric telescopic rods 22 are extended according to the test requirements to support the test block 23 to support the upper end of the soil root system and apply a horizontal force between the root system and the soil, and the pressure sensor 24 measures the specific pressure data in real time.

[0027] Horizontal bubble tubes 25 are fixedly arranged around the longitudinal tilting disk 4, and four groups of horizontal bubble tubes 25 are arranged around it, so as to facilitate observation of the tilting angle according to the bubble position when the transverse tilting ring 3 and the longitudinal tilting disk 4 are tilted.

[0028] Before the test of the soil root pulling and shearing integrated test device, the test box is filled with soil, the roots are buried and the box cover is inserted along the slide slot. When the tilt angle needs to be adjusted to simulate the slope, the first electric telescopic rods on both sides are extended and retracted respectively to make the transverse tilting ring tilt left and right in the adjustment table, and the second electric telescopic rods that are symmetrical front and back are extended and retracted respectively to make the longitudinal tilting plate tilt back and forth and rotate and adjust in the transverse tilting ring. The position of the bubble on the horizontal bubble tube is used to judge whether the tilt angle meets the requirement. When the pulling test is performed, the third electric telescopic rod is extended to drive the clamping blocks to move toward each other to clamp the upper end of the root system. After that, the motor drives the screw to rotate to drive the threaded sleeve and the extension frame to rise, so that the third electric telescopic rod and the clamping block rise synchronously to perform the pulling test. When the shear force test is required, the fourth electric telescopic rod on one side is extended to drive the test block to extend to support the upper end of the root system and continue to extend to increase the pressure. The pressure sensor senses the increased pressure intensity to apply horizontal pressure to the root system to achieve the shear force test.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A soil root pulling shear integrated testing device, characterized in that: The invention comprises a base (1), a multi-directional tilt adjustment simulation mechanism, a pull-out test mechanism and a shear test mechanism, wherein the multi-directional tilt adjustment simulation mechanism comprises an adjustment platform (2), a transverse tilt ring (3), a longitudinal tilt plate (4), a first bracket (5), a first electric telescopic rod (6) and a second electric telescopic rod (7), wherein an adjustment platform (2) is fixedly provided in the middle of the base (1), the adjustment platform (2) is hollow in the middle, a transverse tilt ring (3) is rotatably provided inside the adjustment platform (2), and the two sides of the transverse tilt ring (3) are connected to the bearings of the adjustment platform (2) The transverse tilting ring (3) is connected with a longitudinal tilting plate (4) which is rotatably provided inside the longitudinal tilting plate (4), and the longitudinal tilting plate (4) is connected with the transverse tilting ring (3) bearing in front and back. The base (1) is provided with a first bracket (5) for surrounding the fixing bolt, and the first bracket (5) is provided with four groups. The first brackets (5) are rotatably provided with first electric telescopic rods (6) on both sides, and second electric telescopic rods (7) are rotatably provided on the first brackets (5) in front and back. A pulling test mechanism is provided on the longitudinal tilting plate (4), and a shearing test mechanism is provided on the longitudinal tilting plate (4).

2. The soil root pulling shear integrated testing device according to claim 1 is characterized by: The telescopic end of the first electric telescopic rod (6) is hingedly connected to both sides of the transverse tilting ring (3), and the telescopic end of the second electric telescopic rod (7) is hingedly connected to the longitudinal tilting plate (4) front and rear.

3. The soil root pulling shear integrated testing device according to claim 1, characterized in that: The pull-out test mechanism comprises a second bracket (8), a screw (9), a motor (10), a threaded sleeve (11), an extension frame (12), a third electric telescopic rod (13) and a clamping block (14); the second bracket (8) is fixedly provided in the middle of the upper rear side of the longitudinal tilting plate (4); a screw (9) is rotatably provided in the middle of the front side of the second bracket (8); a motor (10) is fixedly provided in the middle of the top of the second bracket (8); the output end of the motor (10) is drivingly connected to the screw (9); a threaded sleeve (11) is threadedly provided on the screw (9); an extension frame (12) is fixedly provided in front of the threaded sleeve (11); a third electric telescopic rod (13) is symmetrically fixedly provided on the extension frame (12); the telescopic end of the third electric telescopic rod (13) is tilted upward and fixedly provided with a clamping block (14); a shear test mechanism is provided below the extension frame (12).

4. The soil root pulling shear integrated testing device according to claim 3 is characterized by: A sliding rod (15) is symmetrically fixed in front of the second bracket (8), and through holes (16) are symmetrically opened on both sides of the threaded sleeve (11), and the sliding rod (15) slides through the through holes (16) in a sliding manner.

5. The soil root pulling shear integrated testing device according to claim 3 is characterized by: A test box (17) is fixedly provided in the middle of the longitudinal tilting plate (4), a slide groove (18) is symmetrically provided on the top of the test box (17), a box cover (19) is slidably inserted along the slide groove (18) on the top of the test box (17), a pulling hole (20) is provided in the middle of the box cover (19), and the test box (17) corresponds to the extension frame (12) in upper and lower positions.

6. The soil root pulling shear integrated testing device according to claim 3 is characterized by: The shear test mechanism comprises a lifting ring (21), a fourth electric telescopic rod (22) and a test block (23); the lifting ring (21) is fixedly provided below the extension frame (12); the fourth electric telescopic rods (22) are symmetrically fixedly provided on both sides of the lifting ring (21); and the test block (23) is fixedly provided at the telescopic end of the fourth electric telescopic rod (22).

7. The soil root pulling shear integrated testing device according to claim 6, characterized in that: A pressure sensor (24) is embedded and fixed in the middle of the inner side of the test block (23).

8. The soil root pulling shear integrated testing device according to claim 1, characterized in that: A horizontal bubble tube (25) is fixedly disposed around the longitudinal inclined disk (4), and four groups of the horizontal bubble tubes (25) are disposed around the disk.

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