A test device for engineering design of stress detection for silty clay

Abstract

The application provides a kind of test device for engineering design stress detection for silty clay, comprising: bottom frame, the top of the bottom frame is provided with top plate;Supporting assembly, the supporting assembly is respectively arranged in the two sides of the bottom frame.The application provides a kind of test device for engineering design stress detection for silty clay, through double-head motor, threaded rod, moving block, connecting plate, mold, hydraulic telescopic rod, pressing plate and limiting assembly and other structures cooperate with each other, greatly optimize the compaction and take out process of silty clay, after the compaction of clay is completed, double-head motor drives threaded rod to rotate, drives moving block and connecting plate, so that two molds can be smoothly moved away, so that the clay compacted and formed in the middle is completely exposed, which is convenient for users to easily take out, this process effectively avoids the friction between clay and mold, and guarantees the integrity of experimental sample.

Description

Technical Field

[0001] This invention relates to the field of clay stress testing devices, and more particularly to a test device for stress testing of silty clay in engineering design. Background Technology

[0002] In engineering construction, it is necessary to conduct soil stress testing in the area beforehand. If rainfall occurs, the saturation of the soil at the bottom of the foundation pit will increase, the pore air pressure will decrease, and the matric suction will decrease, resulting in a significant reduction in shear strength. Therefore, considering the influence of matric suction and exploring the relationship between matric suction and the shear strength parameters of unsaturated soil in engineering is of great significance for geotechnical engineering problems such as slope stability analysis, retaining wall design, and foundation pit engineering design.

[0003] Before testing silty clay, soil samples need to be prepared, requiring appropriate equipment. The traditional method involves sampling, using a cylindrical sample with a diameter of 39.1 mm and a height of 80 mm. The soil is dried and sieved through a 2 mm sieve. The required amount of water is calculated based on the optimum moisture content. Degassing distilled water is evenly sprayed onto the crushed, remolded soil sample, thoroughly mixed, and sealed in a moisture-retaining plastic bag. This mixture is then left to stand in a moisture-retaining container for at least 48 hours to allow for sufficient water migration and uniform mixing. The required mass of soil sample is calculated based on the preset compaction degree, then compacted in a sample preparation cylinder. The sample is then placed in a vacuum saturator for degassing and water saturation. Before testing, filter paper strips are attached to the sample surface to accelerate drainage. After attaching the filter paper, the sample is placed into the testing instrument.

[0004] When performing compaction molding, a triaxial compression test sampling device is required, such as the prior art patent application with authorization publication number CN 221528160 U. This device uses a support frame at the top of the base to hold the sample, a sample preparation container to store the sample, and a top pressure pump to compact the sample, operated with a handle. While this device makes the sample easier to solidify, requires less effort to operate, and avoids uneven height during compaction, it can easily cause the sample to rub against the inner wall of the sample preparation container when demolding compacted clay, leading to sample deformation or even damage, especially for softer silty clay.

[0005] Therefore, it is necessary to provide a test device for stress detection of silty clay in engineering design to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a test device for stress detection of silty clay in engineering design, which solves the problem that existing triaxial compression test sampling devices are prone to sample damage when demolding silty clay.

[0007] To solve the above-mentioned technical problems, the present invention provides a test device for stress detection of silty clay in engineering design, comprising:

[0008] A bottom frame, the top of which is provided with a top plate;

[0009] Support components are respectively disposed on both sides of the bottom frame;

[0010] Mounting plate, the mounting plate is disposed on the top of the support assembly, the top of the mounting plate is provided with a hydraulic device, the bottom of the mounting plate is fixedly mounted with a hydraulic telescopic rod, the bottom of the hydraulic telescopic rod is fixedly mounted with a pressure sensor, and the bottom of the pressure sensor is fixedly mounted with a pressure plate.

[0011] A fixed base is fixedly installed at the bottom of the top plate. A double-headed motor is fixedly installed inside the fixed base. Threaded rods are fixedly installed at both conveying ends of the double-headed motor. A moving block is threadedly connected to the outer side of the threaded rod. A connecting plate is fixedly installed on the top of the moving block. A mold is provided on one side of the connecting plate.

[0012] A limiting assembly is disposed on the top of the mold. The limiting assembly includes a support frame, a sliding rod, a fixing block, a limiting ring, a limiting plate, and a spring. The support frame is fixedly installed at both ends of the top of the pressure plate. The sliding rod is slidably connected to the inside of the support frame. The fixing block is fixedly installed at the bottom of the sliding rod. The limiting ring is fixedly installed on the side of the fixing block. A spring is sleeved on the outer side of the sliding rod. The limiting plate is fixedly installed at the top of the sliding rod.

[0013] Preferably, a human-computer interaction device is fixedly installed on the front of the bottom frame.

[0014] Preferably, the top of the top plate has grooves at both ends, the movable block is slidably connected to the inner side of the groove, and the two sides of the movable block are respectively attached to the two sides of the inner side of the groove.

[0015] Preferably, a snap-fit ​​groove is provided on one side of the connecting plate, and a snap-fit ​​block is snapped into the inner side of the snap-fit ​​groove. The snap-fit ​​block is fixedly installed on the side of the mold.

[0016] Preferably, the bottom of the mold is slidably connected to the top of the top plate.

[0017] Preferably, the limiting plate is disposed at the top of the support frame, the spring is disposed at the bottom of the support frame, and the limiting ring is disposed at the top of the mold.

[0018] Preferably, the support assembly includes a fixed frame, a fixed rod, an extension rod, a drive motor, and a lead screw. The fixed rod is fixedly installed inside the top of the fixed frame, the extension rod is slidably connected to the inner side of the fixed rod, the drive motor is fixedly installed at the bottom of the inner side of the fixed frame, the lead screw is fixedly installed at the output end of the drive motor, and the lead screw is also disposed inside the extension rod.

[0019] Preferably, the fixing frame is fixedly installed on the side of the bottom frame, and the top of the extension rod is fixedly installed on the bottom of the mounting plate.

[0020] Preferably, the extension rod is square, and the outer side of the extension rod is adapted to the inner side of the fixing rod.

[0021] Preferably, a baffle is fixedly installed on the other side of the connecting plate, and the baffle is disposed on the top of the slide groove.

[0022] Compared with related technologies, the experimental device for stress detection of silty clay in engineering design provided by the present invention has the following advantages:

[0023] This invention provides a test device for stress detection of silty clay in engineering design. Through the coordinated structure of a dual-head motor, threaded rod, moving block, connecting plate, mold, hydraulic telescopic rod, pressure plate, and limiting components, the compaction and removal process of silty clay is greatly optimized. After the clay is compacted, the dual-head motor drives the threaded rod to rotate, which in turn moves the moving block and connecting plate, allowing the two molds to move smoothly in opposite directions. This completely exposes the compacted clay in the middle, making it easy for the user to remove. This process effectively avoids friction between the clay and the mold, ensuring the integrity of the experimental sample. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first embodiment of a test device for stress detection of silty clay in engineering design provided by the present invention.

[0025] Figure 2 for Figure 1 The diagram shows the structure of the mounting plate.

[0026] Figure 3 for Figure 1 The diagram shows a partial cross-sectional view of the bottom frame.

[0027] Figure 4 for Figure 1 The enlarged schematic diagram of part A shown below;

[0028] Figure 5 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0029] Figure 6 This is a schematic diagram of the second embodiment of a test device for stress detection of silty clay in engineering design provided by the present invention.

[0030] Figure 7 This is a schematic diagram of the third embodiment of a test device for stress detection of silty clay in engineering design, provided by the present invention.

[0031] The diagram is labeled as follows: 1. Base frame, 11. Human-computer interaction device, 12. Top plate, 13. Slide groove, 2. Support assembly, 3. Mounting plate, 31. Hydraulic equipment, 32. Hydraulic telescopic rod, 33. Pressure sensor, 34. Pressure plate, 4. Limiting assembly, 41. Support frame, 42. Slide rod, 43. Fixing block, 44. Limiting ring, 45. Limiting plate, 46. Spring, 5. Fixing seat, 51. Dual-head motor, 52. Threaded rod, 53. Moving block, 54. Connecting plate, 55. Mold, 56. Snap-fit ​​groove, 57. Snap-fit ​​block, 21. Fixing frame, 22. Fixing rod, 23. Extension rod, 24. Drive motor, 25. Lead screw, 6. Baffle. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] First Embodiment

[0034] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 This is a schematic diagram of the first embodiment of a test device for stress detection of silty clay in engineering design provided by the present invention. Figure 2 for Figure 1 The diagram shows the structure of the mounting plate. Figure 3 for Figure 1 The diagram shows a partial cross-sectional view of the bottom frame. Figure 4 for Figure 1 The enlarged schematic diagram of part A shown below; Figure 5 for Figure 2 The enlarged schematic diagram of part B is shown. A test device for stress detection of silty clay in engineering design includes: a base frame 1, and a top plate 12 is provided on the top of the base frame 1;

[0035] Support components 2 are respectively disposed on both sides of the bottom frame 1;

[0036] Mounting plate 3 is disposed on the top of the support assembly 2. A hydraulic device 31 is disposed on the top of the mounting plate 3. A hydraulic telescopic rod 32 is fixedly installed on the bottom of the mounting plate 3. A pressure sensor 33 is fixedly installed on the bottom of the hydraulic telescopic rod 32. A pressure plate 34 is fixedly installed on the bottom of the pressure sensor 33.

[0037] A fixed base 5 is fixedly installed at the bottom of the top plate 12. A double-head motor 51 is fixedly installed inside the fixed base 5. Threaded rods 52 are fixedly installed at both conveying ends of the double-head motor 51. A moving block 53 is threadedly connected to the outer side of the threaded rod 52. A connecting plate 54 is fixedly installed on the top of the moving block 53. A mold 55 is provided on one side of the connecting plate 54.

[0038] A limiting component 4 is disposed on the top of the mold 55. The limiting component 4 includes a support frame 41, a sliding rod 42, a fixing block 43, a limiting ring 44, a limiting plate 45, and a spring 46. The support frame 41 is fixedly installed at both ends of the top of the pressure plate 34. The sliding rod 42 is slidably connected to the inside of the support frame 41. The fixing block 43 is fixedly installed at the bottom of the sliding rod 42. The limiting ring 44 is fixedly installed on the side of the fixing block 43. The spring 46 is sleeved on the outer side of the sliding rod 42. The limiting plate 45 is fixedly installed on the top of the sliding rod 42.

[0039] The human-computer interaction device 11 is fixedly installed on the front of the bottom frame 1.

[0040] The top plate 12 has grooves 13 at both ends. The moving block 53 is slidably connected to the inner side of the groove 13, and the two sides of the moving block 53 are respectively attached to the two sides of the inner side of the groove 13.

[0041] A snap-fit ​​groove 56 is provided on one side of the connecting plate 54, and a snap-fit ​​block 57 is snapped into the inner side of the snap-fit ​​groove 56. The snap-fit ​​block 57 is fixedly installed on the side of the mold 55.

[0042] The bottom of the mold 55 is slidably connected to the top of the top plate 12.

[0043] The limiting plate 45 is disposed on the top of the support frame 41, the spring 46 is disposed on the bottom of the support frame 41, and the limiting ring 44 is disposed on the top of the mold 55.

[0044] The bottom frame 1 is in the shape of a cuboid, and a top plate 12 is horizontally set on its top. The top plate 12 is also a rectangular metal plate, which is fixed to the bottom frame 1 by welding or bolting to ensure a firm connection and that it will not loosen during the test.

[0045] Mounting plate 3 is a rectangular metal plate, horizontally set on top of support component 2, and tightly connected by welding or bolts; a hydraulic device 31 is installed on the top of mounting plate 3. The hydraulic device 31 adopts a common integrated design of hydraulic pump and oil tank. The hydraulic device 31 is connected to the hydraulic telescopic rod 32 fixedly installed at the bottom of mounting plate 3 through oil pipe. The hydraulic telescopic rod 32 is set vertically downward, and a pressure sensor 33 is fixedly installed at its bottom. The pressure sensor 33 is a high-precision strain gauge pressure sensor, which can accurately measure the pressure applied by pressure plate 34 to clay and convert the pressure signal into an electrical signal output.

[0046] A double-headed motor 51 is fixedly installed at the center of the fixed base 5. Threaded rods 52 are fixedly installed at both conveying ends of the double-headed motor 51. A movable block 53 is threadedly connected to the outer side of the threaded rod 52. The movable block 53 is rectangular in shape and has threaded holes that match the threaded rod 52. Slide grooves 13 are provided at both ends of the top of the top plate 12. The slide grooves 13 are rectangular grooves. The movable block 53 is slidably connected to the inner side of the slide groove 13, and the two sides of the movable block 53 are tightly fitted to the two sides of the inner side of the slide groove 13. This design makes the movable block 53 slide more smoothly in the slide groove 13, effectively preventing the movable block 53 from shifting or shaking during movement. The locking groove 56 and locking block 57 make it convenient for the user to disassemble and replace the mold 55 during use.

[0047] The slide rod 42 is a cylindrical metal rod that is slidably connected to the inside of the support frame 41. The slide rod 42 can slide freely up and down within the support frame 41. The limiting ring 44 is a circular metal ring that is fixedly installed on the side of the fixing block 43. The inner diameter of the limiting ring 44 is adapted to the outer diameter of the mold 55 so that it can be smoothly fitted onto the outer side of the mold 55 during the test. The diameter of the limiting plate 45 is larger than the diameter of the slide rod 42 to prevent the slide rod 42 from coming out of the support frame 41.

[0048] The working principle of the test device for stress detection of silty clay in engineering design provided by this invention is as follows:

[0049] When using the equipment, the clay to be compacted is placed between the two molds 55. Then, the hydraulic equipment 31 is started to deliver hydraulic oil to the inside of the hydraulic telescopic rod 32. At this time, the hydraulic telescopic rod 32 moves downward, thereby driving the pressure plate 34 to move downward. At the same time, the limiting component 4 also moves downward. At this time, the limiting ring 44 will be fitted onto the outer side of the two molds 55, thereby limiting the two molds 55. Then, the pressure plate 34 continues to move downward until the bottom of the pressure plate 34 presses against the top of the clay, thereby compacting the clay.

[0050] After compaction is completed, the staff will start the hydraulic equipment 31 again to retract the hydraulic telescopic rod 32, thereby moving the pressure plate 34 out from the inner side of the mold 55 and moving the limiting ring 44 from the outer side of the mold 55 to the top of the mold 55.

[0051] The user then starts the dual-head motor 51, which drives the two threaded rods 52 to connect threadedly inside the two moving blocks 53. This causes the two moving blocks 53 to move the two molds 55 in opposite directions, exposing the compacted clay in the middle. At this point, the user can remove the clay.

[0052] Compared with related technologies, the experimental device for stress detection of silty clay in engineering design provided by the present invention has the following advantages:

[0053] The compaction and removal process of silty clay is greatly optimized by the coordinated structure of dual-head motor 51, threaded rod 52, moving block 53, connecting plate 54, mold 55, hydraulic telescopic rod 32, pressure plate 34 and limiting component 4. After the clay is compacted, the dual-head motor 51 drives the threaded rod 52 to rotate, which drives the moving block 53 and connecting plate 54, so that the two molds 55 can move smoothly in opposite directions, thereby completely exposing the compacted clay in the middle, which is convenient for users to remove easily. This process effectively avoids friction between the clay and the mold 55, ensuring the integrity of the experimental sample.

[0054] Second Embodiment

[0055] Please refer to the following: Figure 6 Based on the first embodiment of this application, which provides a test apparatus for stress detection of silty clay in engineering design, the second embodiment of this application proposes another test apparatus for stress detection of silty clay in engineering design. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0056] Specifically, the second embodiment of this application provides a test device for stress detection of silty clay in engineering design, which differs in that the support component 2 includes a fixed frame 21, a fixed rod 22, an extension rod 23, a drive motor 24, and a lead screw 25. The fixed rod 22 is fixedly installed inside the top of the fixed frame 21, the extension rod 23 is slidably connected to the inner side of the fixed rod 22, the drive motor 24 is fixedly installed at the bottom of the inner side of the fixed frame 21, the lead screw 25 is fixedly installed at the output end of the drive motor 24, and the lead screw 25 is also disposed inside the extension rod 23.

[0057] The fixed frame 21 is fixedly installed on the side of the bottom frame 1, and the top of the extension rod 23 is fixedly installed on the bottom of the mounting plate 3.

[0058] The extension rod 22 is square, and the outer side of the extension rod 22 is adapted to the inner side of the fixing rod 21.

[0059] The working principle of the test device for stress detection of silty clay in engineering design provided by this invention is as follows:

[0060] When using the device, if the height of the mounting plate 3 needs to be adjusted, the user can start the drive motor 24, which will drive the lead screw 25 to rotate inside the extension rod 23. At this time, the extension rod 23 will move upward, and the height of the mounting plate 3 can be adjusted when the extension rod 23 moves upward.

[0061] Compared with related technologies, the experimental device for stress detection of silty clay in engineering design provided by the present invention has the following advantages:

[0062] The fixed frame 21, fixed rod 22, extension rod 23, drive motor 24 and lead screw 25 work together to allow the drive motor 24 to drive the lead screw 25 to rotate inside the extension rod 23 during use. This allows the extension rod 23 to move upward, thereby adjusting the height of the mounting plate 3 without requiring manual adjustment by the user.

[0063] Third Embodiment

[0064] Please refer to the following: Figure 7 Based on the first embodiment of this application, which provides a test apparatus for stress detection of silty clay in engineering design, the third embodiment of this application proposes another test apparatus for stress detection of silty clay in engineering design. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0065] Specifically, the third embodiment of this application provides a test device for stress detection of silty clay in engineering design, which differs in that a baffle 6 is fixedly installed on the other side of the connecting plate 54, and the baffle 6 is disposed on the top of the slide 13.

[0066] The working principle of the test device for stress detection of silty clay in engineering design provided by this invention is as follows:

[0067] When the two molds 55 are in contact with each other on one side, the baffle 6 will be at the top of the slide 13, blocking the top of the slide 13. When the two molds 55 move, they can drive the baffle 6 to move.

[0068] Compared with related technologies, the experimental device for stress detection of silty clay in engineering design provided by the present invention has the following advantages:

[0069] By placing the baffle 6 on top of the chute 13, where the two molds 55 are in contact on one side, when adding clay, it can prevent the falling clay from entering the inner side of the bottom frame 1 through the chute 13, thus making it easier for workers to clean the clay on top of the bottom frame 1 later.

[0070] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A test apparatus for stress detection in silty clay in engineering design, characterized in that, include: A bottom frame, the top of which is provided with a top plate; Support components are respectively disposed on both sides of the bottom frame; Mounting plate, the mounting plate is disposed on the top of the support assembly, the top of the mounting plate is provided with a hydraulic device, the bottom of the mounting plate is fixedly mounted with a hydraulic telescopic rod, the bottom of the hydraulic telescopic rod is fixedly mounted with a pressure sensor, and the bottom of the pressure sensor is fixedly mounted with a pressure plate. A fixed base is fixedly installed at the bottom of the top plate. A double-headed motor is fixedly installed inside the fixed base. Threaded rods are fixedly installed at both conveying ends of the double-headed motor. A moving block is threadedly connected to the outer side of the threaded rod. A connecting plate is fixedly installed on the top of the moving block. A mold is provided on one side of the connecting plate. A limiting assembly is disposed on the top of the mold. The limiting assembly includes a support frame, a sliding rod, a fixing block, a limiting ring, a limiting plate, and a spring. The support frame is fixedly installed at both ends of the top of the pressure plate. The sliding rod is slidably connected to the inside of the support frame. The fixing block is fixedly installed at the bottom of the sliding rod. The limiting ring is fixedly installed on the side of the fixing block. A spring is sleeved on the outer side of the sliding rod. The limiting plate is fixedly installed at the top of the sliding rod.

2. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, A human-computer interaction device is fixedly installed on the front of the base frame.

3. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, The top of the top plate has grooves at both ends, the movable block is slidably connected to the inner side of the groove, and the two sides of the movable block are respectively attached to the two sides of the inner side of the groove.

4. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, A snap-fit ​​groove is provided on one side of the connecting plate, and a snap-fit ​​block is snapped into the inner side of the snap-fit ​​groove. The snap-fit ​​block is fixedly installed on the side of the mold.

5. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, The bottom of the mold is slidably connected to the top of the top plate.

6. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, The limiting plate is disposed at the top of the support frame, the spring is disposed at the bottom of the support frame, and the limiting ring is disposed at the top of the mold.

7. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, The support assembly includes a fixed frame, a fixed rod, an extension rod, a drive motor, and a lead screw. The fixed rod is fixedly installed inside the top of the fixed frame. The extension rod is slidably connected to the inner side of the fixed rod. The drive motor is fixedly installed at the bottom of the inner side of the fixed frame. The lead screw is fixedly installed at the output end of the drive motor and is also disposed inside the extension rod.

8. The test apparatus for stress detection of silty clay in engineering design according to claim 7, characterized in that, The fixed frame is fixedly installed on the side of the base frame, and the top of the extension rod is fixedly installed on the bottom of the mounting plate.

9. The test apparatus for stress detection of silty clay in engineering design according to claim 7, characterized in that, The extension rod is square, and the outer side of the extension rod is adapted to the inner side of the fixing rod.

10. The test apparatus for stress detection of silty clay in engineering design according to claim 1, characterized in that, A baffle is fixedly installed on the other side of the connecting plate, and the baffle is located at the top of the slide groove.

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