A comprehensive testing device for lateral expansion force of expansive soil

Abstract

The utility model discloses an expansive soil lateral expansion force comprehensive testing device relates to geotechnical engineering field, including support side plate, the support side plate top is provided with the upper roof, the support side plate bottom is provided with the lower bottom plate, be provided with the reaction unit on the lower bottom plate, the upper roof below cooperation reaction unit is provided with the limiting device, the reaction unit includes the mounting bracket, the mounting bracket is by two metal rings of up and down, the metal frame that constitutes by the metal link between two metal rings, the mounting bracket hollow portion fixed filling has the flexible limit board. The utility model discloses by setting up the mounting bracket that constitutes by metal ring and metal rod, and the reaction space is formed to the flexible limit board, and the water injection amount is controlled simultaneously using the liquid storage tank, the drain pipe and the electromagnetic valve, realizes the reaction space flexible adjustment and accurate control water, lets the test can adapt to different needs, and the data accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering, specifically to a comprehensive testing device for the lateral expansion force of expansive soil. Background Technology

[0002] In the field of geotechnical engineering, expansive soil, as a special type of soil, posed a potential threat to various engineering projects due to its characteristic of swelling upon contact with water and shrinking upon loss of water. With the continuous expansion of infrastructure construction in transportation, buildings, and other sectors, accurately understanding the mechanical properties of expansive soil, especially its lateral expansive force, has become crucial for ensuring the safety and stability of engineering projects. Therefore, developing scientific and efficient testing devices for the lateral expansive force of expansive soil is of great significance for engineering design, construction, and disaster prevention.

[0003] Currently, various devices and methods exist for testing the lateral swelling force of expansive soil. These devices primarily focus on observing the swelling phenomenon of expansive soil, but they have not yet achieved ideal results in terms of precise control of the testing process and comprehensive data acquisition. Most existing devices have relatively simple structures and certain limitations when simulating actual engineering environments, making it difficult to meet the needs of accurate testing of the mechanical properties of expansive soil under complex engineering conditions.

[0004] Current techniques for testing the lateral expansion force of expansive soil typically involve placing the soil sample in a specific container, confining it with a simple restraint structure, and then injecting water to induce expansion. During the expansion process, traditional measuring tools, such as dial gauges, are used to measure and record the displacement and pressure of the expansive soil.

[0005] Existing testing equipment lacks flexibility in reaction space setup, making it difficult to adjust to different testing needs; limiting devices cannot accurately control the water absorption and expansion range of expansive soil, leading to deviations between testing conditions and actual working conditions; and indicating devices are insufficient in terms of data monitoring sensitivity and real-time performance, failing to accurately reflect changes in the lateral expansion force of expansive soil. These shortcomings make existing test results unreliable for effectively guiding actual engineering construction and urgently require improvement. Utility Model Content

[0006] Based on this, the purpose of this utility model is to provide a comprehensive testing device for the lateral expansion force of expansive soil, so as to solve the technical problems of inflexible reaction space and inaccurate water control and expansion control range.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a comprehensive testing device for the lateral expansion force of expansive soil, comprising a supporting side plate, an upper top plate at the top of the supporting side plate, a lower bottom plate at the bottom of the supporting side plate, a reaction device on the lower bottom plate, and a limiting device below the upper top plate in conjunction with the reaction device. The reaction device includes a mounting frame, which is a metal frame consisting of two metal rings connected by a metal rod. A flexible limiting plate is fixedly filled in the hollow part of the mounting frame.

[0008] By adopting the above technical solution, a reaction space is provided for the reacting soil, and the reaction space is restricted by a limiting device.

[0009] The present invention is further configured such that the limiting device includes a mounting plate, a liquid storage tank is disposed below the mounting plate, a first liquid pump is disposed at the top of the mounting plate and connected to the liquid storage tank, the outer diameter of the liquid storage tank is equal to the inner diameter of the mounting frame, a plurality of second liquid pumps are disposed around the bottom of the mounting plate, a connecting plate is installed at the bottom of the second liquid pumps, the connecting plate is arranged in a ring shape, the inner diameter of the connecting plate is larger than the outer diameter of the liquid storage tank, and a limiting barrel is disposed at the bottom of the connecting plate, the inner diameter of the limiting barrel is larger than the outer diameter of the mounting frame.

[0010] By adopting the above technical solution, the liquid storage tank can store liquid, and the first liquid pump can control the liquid storage tank to limit the reaction space of the reaction device.

[0011] The present invention is further configured such that the top of the liquid storage tank is provided with a liquid inlet, the bottom of the liquid storage tank is connected with a plurality of liquid drain pipes, and a solenoid valve is provided inside the liquid storage tank in conjunction with the liquid drain pipes.

[0012] By adopting the above technical solution, the liquid flow is controlled by a solenoid valve, and the liquid is transported to the reaction device through a drain pipe. Different amounts of water are provided to the expansive soil according to the expansion requirements.

[0013] The present invention is further configured such that a drive shaft is connected to the top of the first liquid pump, the drive shaft extends upward through the upper top plate, and the upper top plate is equipped with a drive device in conjunction with the drive shaft.

[0014] By adopting the above technical solution, the transmission shaft is moved up and down by a pneumatic device, thereby controlling the liquid storage tank.

[0015] The present invention is further configured such that a pair of indicating devices are symmetrically arranged on the lower base plate in conjunction with the reaction device. Each indicating device includes a pair of guide grooves, which are formed on both sides of the reaction device on the lower base plate. A connecting frame is slidably arranged in the guide grooves. The connecting frame is arranged in an "L" shape. One end of the connecting frame near the reaction device is connected to a top pressure plate, and the top pressure plate is in contact with the reaction device.

[0016] By adopting the above technical solution, the top pressure plate contacts the reaction device, and when the expanded soil expands, it presses down on the connecting frame, thereby monitoring the expansion force.

[0017] The present invention is further configured such that an indicator plate is provided on the top of the lower base plate, the indicator plate is connected to the connecting frame, a scale line is provided on the top surface of the lower base plate in conjunction with the indicator plate, and a reset spring is provided in the guide groove in conjunction with the connecting frame.

[0018] By adopting the above technical solution, the scale line of the copper drum is used as a reference to observe the expansion force, and the resetting spring ensures that the connecting frame is always in contact with the reaction device, thus guaranteeing the sensitivity of the reaction.

[0019] In summary, the present invention has the following main advantages:

[0020] 1. This utility model sets up a mounting frame composed of a metal ring and a metal rod, and forms a reaction space with a flexible limiting plate. At the same time, it uses a liquid storage tank, a drain pipe and a solenoid valve to control the water injection volume, so as to realize flexible adjustment of the reaction space and precise water control, allowing the test to adapt to different needs and improve the accuracy of data.

[0021] 2. This utility model uses a connecting frame in the guide groove to drive the top pressure plate to contact the reaction device, and works with a reset spring and scale line to monitor the expansion displacement. This setting enables the indicator device to reflect the changes in lateral force of expansive soil in real time, making the monitoring of expansion force more accurate and providing reliable data support for engineering. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of another embodiment of the present invention;

[0024] Figure 3 This is a top view of the lower base plate of this utility model;

[0025] Figure 4 This is a schematic diagram of the liquid storage tank structure of this utility model.

[0026] In the diagram: 1. Support side plate; 2. Top plate; 3. Bottom plate; 4. Drive shaft; 5. Drive device; 6. First liquid pump; 7. Mounting plate; 8. Connecting plate; 9. Limiting barrel; 10. Flexible limiting plate; 11. Mounting frame; 12. Connecting frame; 13. Top pressure plate; 14. Guide groove; 15. Return spring; 16. Indicator plate; 17. Scale line; 18. Second liquid pump; 19. Liquid storage tank; 20. Liquid inlet; 21. Drain pipe; 22. Solenoid valve. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of this utility model will be described below based on its overall structure.

[0029] A comprehensive testing device for the lateral swelling force of expansive soil, such as Figure 1-4 As shown, the device includes a supporting side plate 1, an upper top plate 2 at the top of the supporting side plate 1, and a lower bottom plate 3 at the bottom of the supporting side plate 1. A reaction device is installed on the lower bottom plate 3 to provide reaction space for the expanded clay. A limiting device is installed below the upper top plate 2 in conjunction with the reaction device to limit the space of the expanded clay reacting in the reaction device. This can be adjusted according to different testing requirements. Specifically, the reaction device includes a mounting frame 11, which is a metal frame consisting of two metal rings connected by a metal rod. A flexible limiting plate 10 is fixedly filled in the hollow part of the mounting frame 11. With this setting, in actual use, the expanded clay is poured into the mounting frame 11, and the expanded clay is limited by the flexible limiting plate 10. Then, water can be injected into it.

[0030] In conjunction with the above structure, the limiting device includes a mounting plate 7, with a liquid storage tank 19 disposed below the mounting plate 7. A first liquid pump 6 is disposed at the top of the mounting plate 7 and connected to the liquid storage tank 19. The outer diameter of the liquid storage tank 19 is equal to the inner diameter of the mounting frame 11. Thus, the liquid storage tank 19 is pressed down by the first liquid pump 6 to limit the space within the mounting frame 11. At the same time, a liquid inlet 20 is disposed at the top of the liquid storage tank 19, and several drain pipes 21 are connected to the bottom of the liquid storage tank 19. A solenoid valve 22 is disposed inside the liquid storage tank 19 in conjunction with the drain pipes 21. With this configuration, liquid is input into the liquid storage tank 19 through the liquid inlet 20. In actual use, while the liquid storage tank 19 is used to limit the liquid, the drain pipes 21 are inserted into the expanded clay within the mounting frame 11. At this time, the liquid in the liquid storage tank 19 is controlled to flow out by the solenoid valve 22. The user can control the water absorption of the expanded clay according to the usage requirements.

[0031] A plurality of second liquid pumps 18 are arranged around the bottom of the mounting plate 7. A connecting plate 8 is installed at the bottom of the second liquid pump 18. The connecting plate 8 is arranged in a ring shape. The inner diameter of the connecting plate 8 is larger than the outer diameter of the liquid storage tank 19. A limiting barrel 9 is provided at the bottom of the connecting plate 8. The inner diameter of the limiting barrel 9 is larger than the outer diameter of the mounting frame 11. In conjunction with the above structure, the second liquid pumps 18 control the degree to which the limiting barrel 9 is fitted onto the mounting frame 11, thereby controlling the expansion range of the expanded clay. In actual use, the user, in conjunction with the liquid storage tank 19 in the limiting device of the above structure, further controls the expansion range of the expanded clay and more accurately tests the lateral expansion force of the expanded clay. In conjunction with this, a pair of indicating devices are symmetrically arranged on the lower base plate 3 in conjunction with the reaction device. The indicating devices include a pair of guide grooves 14, which are formed on the lower base plate 3. On both sides of the device, a connecting frame 12 is slidably arranged in the guide groove 14. The connecting frame 12 is arranged in an "L" shape. The end of the connecting frame 12 near the reaction device is connected to the top pressure plate 13. The top pressure plate 13 is in contact with the reaction device. An indicator plate 16 is arranged on the top of the bottom plate 3. The indicator plate 16 is connected to the connecting frame 12. The top surface of the bottom plate 3 is provided with scale lines 17 in conjunction with the indicator plate 16. A return spring 15 is arranged in the guide groove 14 in conjunction with the connecting frame 12. The return spring 15 ensures that the top pressure plate 13 is in contact with the reaction device. With this arrangement, when the expansive soil compresses the flexible limiting plate 10 and expands, it will compress the top pressure plate 13 to move to both sides, thereby driving the connecting frame 12 to move in the guide groove 14, and then driving the indicator plate 16 to move. With the assistance of the scale lines 17, the expansion force of the collapsing soil is monitored.

[0032] The first liquid pump 6 is connected to the top of the drive shaft 4. The drive shaft 4 extends upward through the upper top plate 2. The upper top plate 2 is equipped with a drive device 5 in conjunction with the drive shaft 4. The drive device 5 controls the up and down movement of the drive shaft 4, thereby controlling the up and down movement of the entire limiting device. During testing, the limiting device moves downward to cover the reaction device. Before testing, the limiting device moves upward to add expansive soil into the reaction device.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A comprehensive testing device for lateral expansive force of expansive soil, comprising a supporting side plate (1), characterized in that: The top of the supporting side plate (1) is provided with an upper top plate (2), and the bottom of the supporting side plate (1) is provided with a lower bottom plate (3). The lower bottom plate (3) is provided with a reaction device. The upper top plate (2) is provided with a limiting device below the reaction device. The reaction device includes a mounting frame (11). The mounting frame (11) is a metal frame composed of two metal rings connected by a metal rod. The hollow part of the mounting frame (11) is fixedly filled with a flexible limiting plate (10).

2. The comprehensive testing device for lateral swelling force of expansive soil according to claim 1, characterized in that: The limiting device includes a mounting plate (7), a liquid storage tank (19) is provided below the mounting plate (7), a first liquid pump (6) is provided at the top of the mounting plate (7) and connected to the liquid storage tank (19), the outer diameter of the liquid storage tank (19) is equal to the inner diameter of the mounting frame (11), a plurality of second liquid pumps (18) are provided around the bottom of the mounting plate (7), a connecting plate (8) is installed at the bottom of the second liquid pumps (18), the connecting plate (8) is arranged in a ring shape, the inner diameter of the connecting plate (8) is larger than the outer diameter of the liquid storage tank (19), a limiting barrel (9) is provided at the bottom of the connecting plate (8), the inner diameter of the limiting barrel (9) is larger than the outer diameter of the mounting frame (11).

3. The comprehensive testing device for lateral swelling force of expansive soil according to claim 2, characterized in that: The liquid storage tank (19) is provided with a liquid inlet (20) at the top, and a number of drain pipes (21) are connected to the bottom of the liquid storage tank (19). A solenoid valve (22) is provided in the liquid storage tank (19) in conjunction with the drain pipes (21).

4. The comprehensive testing device for lateral swelling force of expansive soil according to claim 2, characterized in that: The first liquid pump (6) is connected to a drive shaft (4) at the top. The drive shaft (4) extends upward through the upper top plate (2). The upper top plate (2) is equipped with a drive device (5) in conjunction with the drive shaft (4).

5. The comprehensive testing device for lateral swelling force of expansive soil according to claim 1, characterized in that: A pair of indicator devices are symmetrically arranged on the lower base plate (3) in conjunction with the reaction device. The indicator devices include a pair of guide grooves (14). The guide grooves (14) are opened on both sides of the reaction device on the lower base plate (3). A connecting frame (12) is slidably arranged in the guide groove (14). The connecting frame (12) is arranged in an "L" shape. The end of the connecting frame (12) close to the reaction device is connected to the top pressure plate (13). The top pressure plate (13) is in contact with the reaction device.

6. The comprehensive testing device for lateral swelling force of expansive soil according to claim 5, characterized in that: The bottom plate (3) is provided with an indicator plate (16) on its top. The indicator plate (16) is connected to the connecting frame (12). The top surface of the bottom plate (3) is provided with scale lines (17) in conjunction with the indicator plate (16). The guide groove (14) is provided with a return spring (15) in conjunction with the connecting frame (12).

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