Soil sample collapsibility test device

Abstract

The utility model provides a soil sample collapsibility test device, and belongs to the technical field of rock and soil tests. The test device comprises a bottom plate, wherein a U-shaped plate with a downward opening is arranged at the top end of the bottom plate; the test tank is arranged at the top end of the bottom plate, and the test tank is located in the U-shaped plate; the pressure mechanism is arranged on the inner wall of the top end of the U-shaped plate, is positioned above the test tank and is used for pressurizing the soil sample in the test tank; the water injection mechanism is arranged on one side of the U-shaped plate, the water injection mechanism is arranged at the top end of the bottom plate, the water injection mechanism is used for injecting water into the test tank, and a water injection rate control assembly is arranged on the water injection mechanism; the monitoring mechanism is arranged at the top end of the bottom plate and is used for monitoring the soil sample in the test tank. The test device is high in automation degree, can automatically complete the test, reduces man-made interference in the test, and further improves the accuracy and precision of the test.

Description

Technical Field

[0001] The utility model relates to the technical field of rock and soil testing, in particular to a soil sample collapsibility testing device. Background Art

[0002] Collapsibility is a major engineering geological issue in geotechnical engineering. The type and level of collapsibility at a site determine the appropriate selection and design of foundation treatment solutions, significantly impacting project investment and construction progress. Currently, there are two primary methods for evaluating the collapsibility of geotechnical sites: indoor testing and field testing. Indoor collapsibility testing of soil samples is typically performed through compression testing. During compression testing, the sample is loaded to a specified pressure. Once the sample sinks steadily, indicating saturation with water and stable additional sinking, the test is terminated and calculations are performed based on the relevant data.

[0003] During the test, the existing test equipment mainly increases the load manually and takes water manually. The test process has a high degree of human participation, the sample sinks slowly, and the test personnel are prone to fatigue from long-term reading, recording, and observation. The test results are often different from the actual results. Utility Model Content

[0004] Therefore, the utility model aims to solve the problem in the prior art that the collapsible test of soil samples has a large degree of artificial interference and the test results are inaccurate.

[0005] To this end, the technical solution adopted is that the utility model provides a soil sample collapsibility test device, the test device comprising:

[0006] A bottom plate, wherein the top of the bottom plate is provided with a U-shaped plate with an opening facing downwards;

[0007] A test tank is provided on the top of the bottom plate, and the test tank is located inside the U-shaped plate;

[0008] A pressure mechanism is provided on the inner wall of the top end of the U-shaped plate, the pressure mechanism is located above the test tank, and the pressure mechanism is used to pressurize the soil sample in the test tank;

[0009] A water injection mechanism is provided on one side of the U-shaped plate, the water injection mechanism is provided on the top of the bottom plate, and the water injection mechanism is used to inject water into the test tank;

[0010] a water injection volume control component, configured to detect the amount of water injected into the test tank by the water injection mechanism, and control the water injection mechanism to stop injecting water into the test tank when the water injection volume reaches a preset value;

[0011] A monitoring mechanism is arranged on the top of the bottom plate, and is used to monitor the soil sample in the test tank.

[0012] Preferably, the pressure mechanism comprises:

[0013] A hydraulic cylinder is provided on the inner wall of the top end of the U-shaped plate, with the piston rod of the hydraulic cylinder facing downward;

[0014] A pressure plate is provided at the bottom end of the piston rod of the hydraulic cylinder, and the hydraulic cylinder can drive the pressure plate to move longitudinally in the test tank.

[0015] Preferably, the water injection mechanism includes:

[0016] A water tank is provided on one side of the U-shaped plate, and the water tank is provided on the top of the bottom plate;

[0017] a water pipe, one end of which is connected to the water tank, and the other end of which passes through the side wall of the U-shaped plate and is connected to a water injection head, the water injection head facing the test tank, and a water inlet valve is provided on the water pipe;

[0018] The water injection volume control component includes a first controller and a flow meter and a solenoid valve arranged on the water pipe. The solenoid valve is connected to the water pipe, the flow meter is connected to the water pipe, the first controller is electrically connected to the flow meter, and the first controller is electrically connected to the solenoid valve.

[0019] Preferably, the test device further comprises a monitoring mechanism, and the monitoring mechanism comprises:

[0020] A pressure sensor is provided at the bottom end of the pressing plate;

[0021] A displacement sensor is provided on the hydraulic cylinder;

[0022] A temperature sensor is provided on the inner wall of one side of the test tank;

[0023] The second controller is arranged at the top end of one side of the base plate, and the second controller is electrically connected to the pressure sensor, the displacement sensor, and the temperature sensor respectively.

[0024] Preferably, a vertical drain pipe is provided at the bottom end of the test tank, the bottom end of the drain pipe passes through the bottom plate, and a water outlet valve is provided on the drain pipe.

[0025] Preferably, supporting legs are respectively provided around the bottom end of the base plate, and universal wheels are provided at the bottom ends of the supporting legs.

[0026] Preferably, handles are provided on the outer walls on both sides of the bottom plate.

[0027] Preferably, the test device further comprises a cleaning mechanism, and the cleaning mechanism comprises a chute body;

[0028] The chute body is provided on an inner wall of one side of the U-shaped plate, and the chute body extends along the axial direction of the U-shaped plate. A motor is provided at one end of the chute body, and the output end of the motor faces the pressure mechanism. A slider is slidably provided on the chute body.

[0029] One end of the rotating shaft is rotatably connected to the slider, the other end of the rotating shaft is provided with a roller brush, one end of the crank is connected to the output end of the motor, the other end of the crank is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is fixedly connected to the rotating shaft.

[0030] Preferably, collision blocks are respectively provided on the inner walls at both ends of the chute body.

[0031] Preferably, a collecting trough body is detachably provided on the rotating shaft, and the collecting trough body is located below the roller brush.

[0032] The technical solution of this utility model has the following advantages:

[0033] The utility model automatically controls the application of pressure to compact soil samples through a pressure mechanism, automatically injects water quantitatively through a water injection mechanism and a water injection volume control component, and automatically monitors the changes of various data during the test in real time through a monitoring mechanism, thereby realizing automated completion of the test, saving time and effort, reducing human interference in the test, ensuring reliable and accurate test results, improving test efficiency and accuracy, and reducing test costs.

[0034] Moreover, the device of the present application can quickly and accurately obtain the test data of the collapsible test. Compared with traditional collapsible test methods or devices, it can quickly respond to engineering geological conditions, thereby accelerating the progress of the project and greatly improving the project efficiency. In addition, after quickly obtaining the test data of the collapsible test, corresponding measures can be quickly taken for possible risks, so as to achieve the purpose of early warning of construction and main structure risks.

[0035] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1This is a schematic structural diagram of a test device in one embodiment of the present disclosure.

[0039] Figure 2 Schematic diagram of the structure of a monitoring mechanism in one embodiment of the present disclosure.

[0040] Figure 3 This is a schematic diagram of a top view of a cleaning mechanism in one embodiment of the present disclosure;

[0041] Figure 4 A side cross-sectional view of a cleaning mechanism in one embodiment of the present disclosure;

[0042] Figure 5 This is a front view of a chute body in one embodiment of the present disclosure.

[0043] Among them, 1-bottom plate, 2-U-shaped plate, 3-test tank, 4-flow meter; 5-water inlet valve; 6-hydraulic cylinder, 7-pressure plate, 8-water tank, 9-water pipe, 10-water injection head; 11-pressure sensor; 12-displacement sensor; 13-temperature sensor, 14-second controller, 15-drain pipe, 16-water outlet valve, 17-support leg, 18-universal wheel, 19-handle, 20-chute body, 21-motor, 22-slider; 23-rotating shaft; 24-roller brush; 25-crank; 26-connecting rod; 27-collision block; 28-collection trough body; 29-soil moisture sensor. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0045] It should be noted that when a component is referred to as being “fixed to” or “disposed on” another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being “connected to” another component, it can be directly or indirectly connected to the other component.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0048] The present disclosure provides a soil sample collapsibility test device, see Figure 1 The test device includes: a bottom plate 1, a U-shaped plate 2 with an opening facing downward is provided at the top of the bottom plate 1; a test tank 3 is provided at the top of the bottom plate 1, and the test tank 3 is located inside the U-shaped plate 2; a pressure mechanism is provided on the inner wall of the top of the U-shaped plate 2, the pressure mechanism is located above the test tank 3, and the pressure mechanism is used to pressurize the soil sample in the test tank 3; a water injection mechanism is provided on one side of the U-shaped plate 2, the water injection mechanism is provided at the top of the bottom plate 1, and the water injection mechanism is used to inject water into the test tank 3; a water injection amount control component is used to detect the amount of water injected into the test tank 3 by the water injection mechanism, and control the water injection mechanism to stop injecting water into the test tank 3 when the water injection amount reaches a preset value;

[0049] The monitoring mechanism is arranged at the top of the bottom plate 1 and is used to monitor the soil sample in the test tank 3 .

[0050] In the embodiment disclosed herein, the test device consists of a U-shaped plate 2, a test tank 3, a pressure mechanism, a water injection mechanism, a water injection volume control component and a monitoring mechanism; when a soil sample wetting test is required, water is first injected into the test tank 3 through the water injection mechanism. When the water injection volume reaches a preset value, the water injection volume control component controls the water injection mechanism to stop injecting water into the test tank 3. Then, the soil sample is placed in the test tank 3 and compacted by the pressure mechanism. The changes in the soil sample during the test are monitored by the monitoring mechanism to realize the soil sample wetting test.

[0051] Compared with existing test devices, the soil sample wetting and collapsibility test device automatically controls the application of pressure to compact the soil sample through a pressure mechanism, automatically injects water in a quantitative manner through a water injection mechanism and a water injection volume control component, and automatically monitors the changes in various data during the test in real time through a monitoring mechanism, thereby completing the test automatically, saving time and effort, reducing human interference in the test, and ensuring reliable and accurate test results, thereby improving test efficiency and accuracy and reducing test costs.

[0052] In one embodiment of the present disclosure, see Figure 1 The pressure mechanism includes a hydraulic cylinder 6, which is installed on the inner wall of the top of the U-shaped plate 2, with the piston rod of the hydraulic cylinder 6 facing downward; and a pressure plate 7, which is installed at the bottom end of the piston rod of the hydraulic cylinder 6. The hydraulic cylinder 6 can drive the pressure plate 7 to move longitudinally within the test tank 3. In this way, the hydraulic cylinder 6 drives the pressure plate 7 to move within the test tank 3, pressurizing the soil sample and completing the test.

[0053] In one embodiment of the present disclosure, see Figure 1 The water filling mechanism includes: a water tank 8, which is arranged on one side of the U-shaped plate 2, and the water tank 8 is arranged on the top of the bottom plate 1; a water pipe 9, one end of the water pipe 9 is connected to the water tank 8, and the other end of the water pipe 9 passes through the side wall of the U-shaped plate 2 and is connected to the water filling head 10, and the water filling head 10 faces the test tank 3, and a water inlet valve 5 is provided on the water pipe 9.

[0054] The water injection control assembly includes a first controller, a flowmeter 4, and a solenoid valve disposed on the water pipe 9. The solenoid valve is in communication with the water pipe 9, the flowmeter 4 is in communication with the water pipe 9, the first controller is electrically connected to the flowmeter 4, and the first controller is electrically connected to the solenoid valve. The solenoid valve is used to control the conduction and closing of the pipe 9, thereby starting and stopping water injection into the test tank 3. The first controller and the solenoid valve are not shown in the figure. The flowmeter 4 detects the amount of water injected into the test tank 3 through the water pipe 9 and sends the injection amount data to the first controller. A preset water injection amount can be set on the first controller. When the water injection amount received from the flowmeter 4 reaches the preset value, the first controller controls the solenoid valve to close, stopping water injection. The water inlet valve 5 serves as the mechanical master switch for water injection control. In this way, the required amount of water can be intelligently and quantitatively injected into the test tank 3, achieving precise water injection, thereby improving test efficiency.

[0055] In other embodiments, the water injection volume control component includes a non-contact capacitive sensor, a water injection controller and a solenoid valve. The water injection controller and the non-contact capacitive sensor are electrically connected. The water injection controller and the solenoid valve are electrically connected. The non-contact capacitive sensor is arranged on the outer surface of the test tank 3. The probe of the non-contact capacitive sensor is aligned with the preset water level. The solenoid valve is installed on the pipe 9. The opening and closing of the solenoid valve is used to control the conduction and closing of the pipe 9 to realize the start and stop of water injection into the test tank 3. When the liquid level in the test tank 3 reaches the preset water level, the non-contact capacitive sensor sends a signal to stop water injection to the water injection controller. The water injection controller controls the solenoid valve to close, and the water injection mechanism stops injecting water.

[0056] Optionally, the water pipe 9 is a telescopic pipe, and the position of the water injection head 10 can be adjusted according to the positions of other mechanisms in the test device to ensure that the water flows into the test tank 3 accurately.

[0057] In one embodiment of the present disclosure, see Figure 2The test apparatus also includes a monitoring mechanism, comprising a pressure sensor 11 located at the bottom of the pressure plate 7; a displacement sensor 12 located on the hydraulic cylinder 6; a temperature sensor 13 located on the inner wall of the test tank 3; and a second controller 14 located at the top of the bottom plate 1. Second controller 14 is electrically connected to pressure sensor 11, displacement sensor 12, and temperature sensor 13. This monitoring mechanism monitors the status of each mechanism and the soil sample within the test tank 3 during the test, thereby monitoring changes in test data in real time and achieving high test accuracy.

[0058] Optionally, the pressure sensor 11 is used to monitor the pressure applied by the pressure plate 7, the displacement sensor 12 is used to monitor the amount of soil sample settlement, the temperature sensor 13 is used to monitor the temperature change of the soil sample, and the second controller 14 is used to control the operation of each sensor and record the data monitored by each sensor.

[0059] Optionally, the second controller 14 is electrically connected to the flow meter 4 .

[0060] Optionally, a soil moisture sensor 29 may be further provided on the inner wall of the test tank 3 . The soil moisture sensor 29 is electrically connected to the second controller 14 . The soil moisture sensor 29 is used to monitor changes in the moisture content of the soil sample during the experiment.

[0061] In one embodiment of the present disclosure, see Figure 1 The bottom of the test tank 3 is provided with a vertical drain pipe 15, the bottom end of the drain pipe 15 passes through the bottom plate 1, and a water outlet valve 16 is provided on the drain pipe 15. In this way, the water in the test tank 3 is easily discharged.

[0062] Optionally, the test tank 3 is detachably mounted on the top of the base plate 1 , and a through hole is provided on the base plate 1 through which the drain pipe 15 and the water outlet valve 16 can pass. When the test tank 3 needs to be disassembled, the drain pipe 15 and the water outlet valve 16 can be removed from the base plate 1 together with the test tank 3 .

[0063] In one embodiment of the present disclosure, see Figure 1 , the bottom of the base plate 1 is respectively provided with supporting legs 17 around the bottom, the bottom of the supporting legs 17 is provided with universal wheels 18, and handles 19 are respectively provided on the outer walls on both sides of the base plate 1. In this way, it is convenient to move the test device and then facilitate testing in different regions.

[0064] In one embodiment of the present disclosure, see Figures 3 to 5The test device also includes a cleaning mechanism, which includes a chute body 20; the chute body 20 is arranged on the inner wall of one side of the U-shaped plate 2, and the chute body 20 extends along the axial direction of the U-shaped plate 2. A motor 21 is provided at one end of the chute body 20, and the output end of the motor 21 faces the pressure mechanism. A slider 22 is slidably provided on the chute body 20; one end of the rotating shaft 23 is rotatably connected to the slider 22, and the other end of the rotating shaft 23 is provided with a roller brush 24. One end of the crank 25 is connected to the output end of the motor 21, and the other end of the crank 25 is rotatably connected to one end of the connecting rod 26. The other end of the connecting rod 26 is fixedly connected to the rotating shaft 23. Collision blocks 27 are respectively provided on the inner walls of both ends of the chute body 20, and a collection trough body 28 is detachably provided on the rotating shaft 23. The collection trough body 28 is located below the roller brush 24. In this way, after the test is completed, the bottom surface of the pressure plate 7 can be cleaned by the cleaning mechanism to ensure that the bottom surface of the pressure plate 7 is clean, which is convenient for the next test and thus improves the test accuracy.

[0065] It can be understood that after the test is completed, the hydraulic cylinder 6 moves the pressure plate 7 to the top of the roller brush 24, starts the motor 21, and drives the crank 25 to rotate around the output shaft of the motor 21, so that the connecting rod 26 swings around the rotating shaft 23 while reciprocating along the chute body 20, thereby driving the slider 22 to reciprocate along the chute body 20, driving the rotating shaft 23 to rotate forward and reverse while reciprocating along the chute body 20, and driving the roller brush 24 to rotate forward and reverse while reciprocating along the chute body 20, cleaning the bottom surface of the pressure plate 7 and sweeping off the mud adhering to the bottom surface of the pressure plate 7 to ensure that the pressure is kept low. The bottom surface of the plate 7 is clean to avoid affecting the next test; the slider 22 intermittently collides with the two collision blocks 27 during the movement, shaking off the dirt adhering to the surface of the roller brush 24, keeping the surface of the roller brush 24 clean, and improving the cleaning efficiency of the roller brush 24; the dirt on the pressure plate 7 swept off by the roller brush 24 and the dirt dropped by the vibration of the roller brush 24 fall into the collecting trough 28, avoiding the fallen dirt from falling into the test tank 3 and affecting the progress of the test. When a certain amount of dirt accumulates in the collecting trough 28, the collecting trough 28 is removed from the rotating shaft 23 and the collected dirt is poured out.

[0066] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A soil sample collapsibility testing device, characterized in that: The test device comprises: A bottom plate (1), wherein a U-shaped plate (2) with an opening facing downward is provided at the top end of the bottom plate (1); A test tank (3) is provided on the top of the bottom plate (1), and the test tank (3) is located inside the U-shaped plate (2); A pressure mechanism is provided on the inner wall of the top end of the U-shaped plate (2), the pressure mechanism is located above the test tank (3), and the pressure mechanism is used to pressurize the soil sample in the test tank (3); A water injection mechanism is provided on one side of the U-shaped plate (2), the water injection mechanism is provided on the top of the bottom plate (1), and the water injection mechanism is used to inject water into the test tank (3); a water injection volume control component for detecting the volume of water injected into the test tank (3) by the water injection mechanism and controlling the water injection mechanism to stop injecting water into the test tank (3) when the water injection volume reaches a preset value; A monitoring mechanism is provided on the top of the bottom plate (1), and is used to monitor the soil sample in the test tank (3).

2. A soil sample collapsibility testing device according to claim 1, characterized in that: The pressure mechanism comprises: A hydraulic cylinder (6) is arranged on the inner wall of the top end of the U-shaped plate (2), and the piston rod of the hydraulic cylinder (6) is arranged downward; A pressure plate (7) is provided at the bottom end of the piston rod of the hydraulic cylinder (6), and the hydraulic cylinder (6) is capable of driving the pressure plate (7) to move longitudinally in the test tank (3).

3. A soil sample collapsibility testing device as claimed in claim 1, characterized in that: The water injection mechanism comprises: A water tank (8) is provided on one side of the U-shaped plate (2), and the water tank (8) is provided on the top of the bottom plate (1); a water pipe (9), one end of the water pipe (9) being in communication with the water tank (8), the other end of the water pipe (9) passing through the side wall of the U-shaped plate (2) and in communication with a water injection head (10), the water injection head (10) facing the test tank (3), and a water inlet valve (5) being provided on the water pipe (9); The water injection quantity control component comprises a first controller, a flow meter (4) and a solenoid valve arranged on the water pipe (9), the solenoid valve and the water pipe (9) are in communication, the flow meter (4) and the water pipe (9) are in communication, the first controller and the flow meter (4) are electrically connected, and the first controller and the solenoid valve are electrically connected.

4. A soil sample collapsibility testing device as claimed in claim 2, characterized in that: The test device also includes a monitoring mechanism, which includes: A pressure sensor (11) is provided at the bottom end of the pressure plate (7); a displacement sensor (12), provided on the hydraulic cylinder (6); A temperature sensor (13) is provided on an inner wall of one side of the test tank (3); The second controller (14) is arranged at the top end of one side of the base plate (1), and the second controller (14) is electrically connected to the pressure sensor (11), the displacement sensor (12), and the temperature sensor (13) respectively.

5. A soil sample collapsibility testing device as claimed in claim 1, characterized in that: A vertical drainage pipe (15) is provided at the bottom end of the test tank (3), the bottom end of the drainage pipe (15) passes through the bottom plate (1), and a water outlet valve (16) is provided on the drainage pipe (15).

6. A soil sample collapsibility testing device as claimed in claim 1, characterized in that: Support legs (17) are respectively provided around the bottom end of the base plate (1), and universal wheels (18) are provided at the bottom ends of the support legs (17).

7. A soil sample collapsibility testing device as claimed in claim 1, characterized in that: Handles (19) are respectively provided on the outer walls on both sides of the bottom plate (1).

8. A soil sample collapsibility testing device as claimed in claim 1, characterized in that: The test device further comprises a cleaning mechanism, wherein the cleaning mechanism comprises a chute body (20); The chute body (20) is arranged on an inner wall of one side of the U-shaped plate (2), and the chute body (20) extends along the axial direction of the U-shaped plate (2). A motor (21) is arranged at one end of the chute body (20), and the output end of the motor (21) faces the pressure mechanism. A slider (22) is slidably arranged on the chute body (20); One end of the rotating shaft (23) is rotatably connected to the slider (22), and the other end of the rotating shaft (23) is provided with a roller brush (24). One end of the crank (25) is connected to the output end of the motor (21), and the other end of the crank (25) is rotatably connected to one end of a connecting rod (26). The other end of the connecting rod (26) is fixedly connected to the rotating shaft (23).

9. A soil sample collapsibility testing device as claimed in claim 8, characterized in that: Collision blocks (27) are respectively provided on the inner walls at both ends of the chute body (20).

10. A soil sample collapsibility testing device according to claim 8, characterized in that: A collecting trough (28) is detachably provided on the rotating shaft (23), and the collecting trough (28) is located below the rolling brush (24).

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