Soil sample single-side direct shear test device

Abstract

The utility model provides a single-sided direct shear test device for a soil sample, which relates to the technical field of direct shear test devices and comprises two support frames, a workbench is fixedly mounted between the tops of the two support frames, and two fixing blocks are fixedly mounted at the top of the workbench. According to the utility model, the positions of the two hydraulic cylinders can be adjusted through the operation of the motor, so that the hydraulic cylinders can be vertical to the soil sample, and the hydraulic cylinders operate to apply pressure to the soil sample, so that the automation degree is high, the control is simple and reliable, the complexity and uncertainty of manual operation are greatly reduced, and the accuracy and efficiency of the test are improved; meanwhile, the pressure received by the soil sample can be observed in real time through the pressure gauge, and the value of the pressure applied to the soil sample by the hydraulic cylinder can be directly displayed, so that a tester can grasp the change condition of the pressure in real time and adjust the pressure output of the hydraulic cylinder as required, and the accurate and stable pressure is applied to the soil sample; the device has the advantages of being high in automation degree, uniform and stable in applied pressure and high in adaptability.

Description

Technical Field

[0001] The utility model relates to the technical field of direct shear test devices, in particular to a soil sample single-surface direct shear test device. Background Art

[0002] Direct shear test (also called direct shear test or direct shear test) is an indoor test method widely used in soil mechanics and geological engineering. It is mainly used to determine the shear strength parameters of soil. In the direct shear test, a soil sample is placed between two parallel shear planes, usually a fixed shear box and a horizontally movable shear box. A constant pressure is applied in the vertical direction, and then the shear force is gradually increased in the horizontal direction until the soil sample is sheared between the two shear planes.

[0003] In the prior art, when conducting a direct shear test on soil samples, weights are manually added to provide different pressures for testing. However, manual weight addition may cause errors due to the different experience and skill levels of the operators, and different pressures cannot be accurately applied to the soil samples. At the same time, due to the different temperature changes in the surrounding environment of the experiment, the different temperatures during the experiment will also affect the error of the soil sample measurement results, thereby affecting the accuracy of the test results. Utility Model Content

[0004] The utility model mainly provides a soil sample single-surface direct shear test device which can automatically pressurize and control temperature.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a soil sample single-sided direct shear test device, comprising two support frames, a workbench is fixedly installed between the tops of the two support frames, two fixed blocks are fixedly installed on the top of the workbench, the outer walls of the two fixed blocks are each provided with a hole one, a two-way threaded rod is movably inserted between the inner walls of the two holes one, the outer walls of the two-way threaded rod are threadedly connected to two movable slides, the outer walls of the two-way threaded rod are each fixedly sleeved with two limiting rings, a motor is arranged on one side of the outer wall of the two-way threaded rod, a support plate is fixedly installed on the top of the two movable slides, a hydraulic cylinder is fixedly installed on the top of the two support plates, a piston rod is arranged on the output ends of the two hydraulic cylinders, and the two support A base is fixedly installed on the top of the plate, and pressure gauges are arranged on the top of the two bases. The two-way threaded rod is threadedly connected to the two movable slides, and two limit rings are arranged in the middle of the two-way threaded rod, and the two-way threaded rod is connected to the motor. The operation of the motor drives the two-way threaded rod to rotate, thereby driving the two movable slides to move relative to each other, and move to the two limit rings to stop. At the same time, the movable slide is fixedly connected to the support plate, and the hydraulic cylinder is connected to the piston rod. The operation of the hydraulic cylinder drives the piston rod to extend and retract to press the soil sample. At the same time, the hydraulic cylinder is connected to the pressure gauge, so that the pressure condition of the soil sample can be observed in real time, and the pressure output of the hydraulic cylinder can be adjusted as needed to achieve accurate and stable pressure on the soil sample, which is helpful to simulate the soil stress condition in the real project and improve the reliability and practicality of the test.

[0006] Preferably, a controller is fixedly installed on the top of the workbench, two lower shear boxes are arranged on the top of the workbench, upper shear boxes are arranged on the top of the two lower shear boxes, and the upper shear boxes are placed on the lower shear boxes. The controller and the hydraulic cylinder are linearly connected by the motor, so that the device can be controlled more conveniently.

[0007] Preferably, two threaded holes are provided on the top of the two upper shear boxes, and the inner walls of the four threaded holes are threadedly connected with screws. By rotating the two screws into the two threaded holes, the upper shear box and the lower shear box are fixed to each other, making the device more stable during direct shearing.

[0008] Preferably, the tops of the two upper shear boxes are each provided with a second hole, and the inner walls of the two second holes are each provided with a top cover, and the soil sample is put into the second hole, and then the top cover is closed to compact the soil sample to ensure the accuracy of the experiment.

[0009] Preferably, the tops of the two top covers are each provided with a hole three, and the top of the workbench is provided with two shells. The two holes three can be closed with a piston rod, and the piston rod is lowered and inserted into the hole three to apply pressure to the soil sample, thereby applying upper pressure for direct shear, thereby avoiding skewed pressure and affecting the experimental results.

[0010] Preferably, a heating plate is provided on the inner walls of the two outer shells, and two connecting plates are fixedly installed on the outer walls of the two outer shells. The inner walls of the outer shells are connected to the heating plates, and the heating plates are also linearly connected to the controller. The temperature of the heating plates is controlled by the controller, so that the temperature of the test environment can be accurately controlled to ensure that the test is carried out under the set temperature conditions.

[0011] Preferably, the tops of the four connecting plates are each provided with a threaded hole 2, and the inner walls of the four threaded holes 2 are threadedly connected with screws 2. By rotating the four screws 2 into the four threaded holes 2, and the threaded holes 2 are passed through the workbench, and the screws 2 are tightened, the heating plate can be fixed to the workbench and can be disassembled. When it fails or needs maintenance, it can be easily removed for repair or replacement without affecting the use of the entire test device.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the positions of the two hydraulic cylinders can be adjusted by running the motor so that they can be perpendicular to the soil sample. Secondly, the hydraulic cylinders are operated to apply pressure to the soil sample. The automation is high and the control is simple and reliable, which greatly reduces the tediousness and uncertainty of manual operation and improves the accuracy and efficiency of the test. At the same time, the pressure received by the soil sample can be observed in real time through the pressure gauge, and the pressure value applied by the hydraulic cylinder on the soil sample can be directly displayed, so that the test personnel can grasp the pressure changes in real time and can adjust the pressure output of the hydraulic cylinder as needed to achieve accurate and stable pressure on the soil sample. The device has the advantages of high automation, uniform and stable pressure application, strong adaptability, simple operation and high safety.

[0014] 2. In the utility model, the temperature of the heating plate can be controlled by the controller, and the temperature of the test environment can be accurately controlled to ensure that the test is carried out under the set temperature conditions, which is helpful to study the mechanical properties of soil samples under different temperature conditions and provide more accurate data support for engineering practice. At the same time, the heating plate is connected to the workbench by rotating the second screw into the second threaded hole. At the same time, the heating plate can be disassembled and can be easily removed from the test device for thorough cleaning and maintenance, which helps to keep the test device clean and sanitary and reduce the impact of pollution or residues on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a soil sample single-sided direct shear test device is proposed for the utility model;

[0016] Figure 2 A three-dimensional disassembled diagram of the main mechanism of a soil sample single-sided direct shear test device is proposed for the utility model;

[0017] Figure 3 The utility model provides a schematic diagram of the main mechanism of a soil sample single-sided direct shear test device;

[0018] Figure 4 The utility model provides a three-dimensional exploded diagram of the main mechanism of a soil sample single-sided direct shear test device.

[0019] Legend: 1. Support frame; 2. Workbench; 3. Fixed block; 4. Hole one; 5. Bidirectional threaded rod; 6. Moving slide; 7. Limit ring; 8. Motor; 9. Support plate; 10. Hydraulic cylinder; 11. Piston rod; 12. Base; 13. Pressure gauge; 14. Controller; 15. Lower shear box; 16. Upper shear box; 17. Threaded hole one; 18. Screw one; 19. Hole two; 20. Top cover; 21. Hole three; 22. Outer shell; 23. Heating plate; 24. Connecting plate; 25. Threaded hole two; 26. Screw two. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] See also Figure 1-Figure 3The utility model provides a technical solution: a soil sample single-sided direct shear test device, comprising two support frames 1, a workbench 2 is fixedly installed between the tops of the two support frames 1, two fixed blocks 3 are fixedly installed on the top of the workbench 2, the outer walls of the two fixed blocks 3 are each provided with a hole 4, a bidirectional threaded rod 5 is movably inserted between the inner walls of the two holes 4, the outer walls of the two-way threaded rod 5 are threadedly connected with two movable slides 6, the outer walls of the two-way threaded rod 5 are each fixedly sleeved with two limiting rings 7, a motor 8 is arranged on one side of the outer wall of the two-way threaded rod 5, support plates 9 are fixedly installed on the tops of the two movable slides 6, hydraulic cylinders 10 are fixedly installed on the tops of the two support plates 9, piston rods 11 are arranged on the output ends of the two hydraulic cylinders 10, bases 12 are fixedly installed on the tops of the two support plates 9, and the two bottom A pressure gauge 13 is arranged on the top of the seat 12, the bidirectional threaded rod 5 is threadedly connected with the two movable slides 6, and two limit rings 7 are arranged in the middle of the bidirectional threaded rod 5, and the bidirectional threaded rod 5 is connected with the motor 8. The operation of the motor 8 drives the bidirectional threaded rod 5 to rotate, thereby driving the two movable slides 6 to move relative to each other, and move to the two limit rings 7 to stop. At the same time, the movable slide 6 is fixedly connected to the support plate 9, and the hydraulic cylinder 10 is connected with the piston rod 11. The operation of the hydraulic cylinder 10 drives the piston rod 11 to extend and retract to press the soil sample. At the same time, the hydraulic cylinder 10 is connected with the pressure gauge 13, and the pressure condition of the soil sample can be observed in real time. The pressure output of the hydraulic cylinder 10 can be adjusted as needed to achieve accurate and stable pressure on the soil sample, which is helpful to simulate the soil stress condition in the real project and improve the reliability and practicality of the test.

[0023] like Figure 3 As shown, a controller 14 is fixedly installed on the top of the workbench 2, and two lower shear boxes 15 are arranged on the top of the workbench 2. Upper shear boxes 16 are arranged on the top of the two lower shear boxes 15. The upper shear boxes 16 are placed on the lower shear boxes 15. The controller 14 and the hydraulic cylinder 10 are linearly connected to the motor 8, so that the device can be controlled more conveniently.

[0024] like Figure 4 As shown, the tops of the two upper shear boxes 16 are provided with two threaded holes 17, and the inner walls of the four threaded holes 17 are threadedly connected with screws 18. By rotating the two screws 18 into the two threaded holes 17, the upper shear box 16 and the lower shear box 15 are fixed to each other, making the device more stable during direct shearing.

[0025] like Figure 4 As shown, the tops of the two upper shear boxes 16 are each provided with a second hole 19, and the inner surface walls of the two holes 19 are each provided with a top cover 20, and soil samples are put into the second holes 19, and then the top covers 20 are closed to compact the soil samples to ensure the accuracy of the experiment.

[0026] like Figure 4As shown, the tops of the two top covers 20 are each provided with a hole three 21, and the top of the workbench 2 is provided with two shells 22. The two holes three 21 can be closed with the piston rod 11. The piston rod 11 descends and is inserted into the hole three 21 to apply pressure to the soil sample, and applies upper pressure of direct shear to avoid skewed pressure and affect the experimental results.

[0027] like Figure 4 As shown, heating plates 23 are provided on the inner walls of the two outer shells 22, and two connecting plates 24 are fixedly installed on the outer walls of the two outer shells 22. The inner walls of the outer shells 22 are connected to the heating plates 23, and the heating plates 23 are also linearly connected to the controller 14. The temperature of the heating plates 23 is controlled by the controller 14, so that the temperature of the test environment can be accurately controlled to ensure that the test is carried out under the set temperature conditions.

[0028] like Figure 4 As shown, threaded holes 25 are provided on the tops of the four connecting plates 24, and screws 26 are threadedly connected to the inner walls of the four threaded holes 25. By rotating the four screws 26 into the four threaded holes 25, and the threaded holes 25 are passed through the workbench 2, and the screws 26 are tightened, the heating plate 23 can be fixed to the workbench 2, and can be disassembled. When it fails or needs maintenance, it can be easily removed for repair or replacement without affecting the use of the entire test device.

[0029] The method of use and working principle of the device: when the device is in use, the soil sample is placed in the second hole 19 on the top of the upper shear box 16, and then the absorbent stone is pressed on, and then the top cover 20 is covered. At the same time, the controller 14 on the top of the workbench 2 is linearly connected to the hydraulic cylinder 10, the motor 8 and the heating plate 23, and the operation of each mechanism of the device can be controlled by the controller 14. At this time, the outer wall of the two-way threaded rod 5 is threadedly connected to two movable slides 6, and the outer wall of the two-way threaded rod 5 is fixedly sleeved with two limit rings 7. The motor 8 is connected to the two-way threaded rod 5, and the operation of the motor 8 drives the two-way threaded rod 5 to rotate, so that the two movable slides 6 move relative to each other, and finally drive the two hydraulic cylinders 10 to move relative to each other, and the final stop position is limited by the limit ring 7. Secondly, the hydraulic cylinder 10 is connected to the piston rod 11, and the operation of the hydraulic cylinder 10 drives the piston rod 11 to extend and retract, and the piston rod 11 can be inserted in the third hole 21, so as to apply pressure to the soil sample, which can be based on The applied pressure and rate can be adjusted according to the test needs to adapt to the needs of different soil types and test conditions, and it has strong adaptability. At the same time, the hydraulic cylinder 10 is connected to the pressure gauge 13. Through the pressure gauge 13, the test personnel do not need to frequently query and adjust the pressure value through the control system. They only need to observe the pressure gauge 13 to understand the current pressure situation and make adjustments as needed. This greatly simplifies the operation process and improves the test efficiency. At the same time, the workbench 2 is connected to the shell 22, and the shell 22 is connected to the heating plate 23. The temperature of the heating plate 23 is controlled by the controller 14. By setting different temperature control parameters, the mechanical properties of soil samples under different temperature conditions in actual engineering can be simulated. The heating plate 23 and the workbench 2 can be fixed to each other by passing the screw 26 through the threaded hole 25, so that the heating plate 23 can be easily disassembled. After completing the test, the detachable temperature control mechanism can be easily removed from the test device for thorough cleaning and maintenance.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A soil sample single-sided direct shear test device, characterized in that: The invention comprises two support frames (1), a workbench (2) is fixedly installed between the tops of the two support frames (1), two fixed blocks (3) are fixedly installed on the top of the workbench (2), the outer walls of the two fixed blocks (3) are each provided with a hole (4), a bidirectional threaded rod (5) is movably inserted between the inner walls of the two holes (4), the outer walls of the bidirectional threaded rod (5) are threadedly connected with two movable slides (6), the outer walls of the bidirectional threaded rod (5) are each fixedly sleeved with two limit rings (7), a motor (8) is arranged on one side of the outer wall of the bidirectional threaded rod (5), a support plate (9) is fixedly installed on the tops of the two movable slides (6), a hydraulic cylinder (10) is fixedly installed on the tops of the two support plates (9), a piston rod (11) is arranged at the output end of the two hydraulic cylinders (10), a base (12) is fixedly installed on the tops of the two support plates (9), and a pressure gauge (13) is arranged on the tops of the two bases (12).

2. A soil sample single-surface direct shear test device according to claim 1, characterized in that: A controller (14) is fixedly mounted on the top of the workbench (2), two lower shear boxes (15) are arranged on the top of the workbench (2), and upper shear boxes (16) are arranged on the tops of the two lower shear boxes (15).

3. A soil sample single-surface direct shear test device according to claim 2, characterized in that: The tops of the two upper shear boxes (16) are each provided with two threaded holes (17), and the inner walls of the four threaded holes (17) are each threadedly connected with screws (18).

4. A soil sample single-surface direct shear test device according to claim 3, characterized in that: The tops of the two upper shear boxes (16) are each provided with a second hole (19), and the inner surface walls of the two second holes (19) are each provided with a top cover (20).

5. A soil sample single-surface direct shear test device according to claim 4, characterized in that: The tops of the two top covers (20) are each provided with a hole three (21), and the top of the workbench (2) is each provided with two outer shells (22).

6. A soil sample single-surface direct shear test device according to claim 5, characterized in that: The inner walls of the two outer shells (22) are both provided with a heating plate (23), and the outer walls of the two outer shells (22) are both fixedly mounted with two connecting plates (24).

7. A soil sample single-surface direct shear test device according to claim 6, characterized in that: The tops of the four connecting plates (24) are each provided with a second threaded hole (25), and the inner walls of the four second threaded holes (25) are each threadedly connected with a second screw (26).

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