A device for preparing a sample of remolded soil

Abstract

The present application relates to the technical field of civil engineering, and discloses a remolded soil sample preparation device, which comprises a base, a lower plate arranged on the top of the base and capable of supporting a sample preparation cylinder, an upper plate oppositely arranged above the lower plate, and a loading mechanism arranged on the upper plate; the loading mechanism comprises a loading plate, a marking assembly and a moving assembly; the loading plate is axially movable in the sample preparation cylinder; the marking assembly and the moving assembly are both accommodated in the loading plate; the moving assembly is driven to move downward by the loading plate; the moving assembly can first drive the marking assembly to extend to the outside of the bottom of the loading plate to touch and press the surface of the soil layer, and then drive the loading plate to rotate circumferentially as a whole. When the soil layer needs to be compacted each time, the loading mechanism arranged on the upper plate is only required to be driven to move downward, so that the compacting of the soil layer, the drilling of the nail head into the soil layer and the rotation of the nail head driven by the loading plate to evenly mark the surface of the soil layer can be sequentially and automatically and conveniently achieved, deviation is avoided, and the quality of the prepared sample of the remolded soil is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering, and particularly relates to a remolded soil sample preparation device. BACKGROUND

[0002] The layered sample preparation of remolded soil is one of the commonly used methods in soil physics research, and the layered sample preparation by using the compaction method can ensure the homogeneity and representativeness of the sample. The specific operation steps include the following steps in sequence:

[0003] S1, selecting a suitable remolded soil sample to ensure the representativeness and homogeneity of the sample.

[0004] S2, preparing the required sampling tools, such as a sampling cylinder, a sand density cylinder, a metal rod and the like.

[0005] S3, laying a layer of adhesive tape on a flat and hard ground in the laboratory to prevent the soil sample from directly contacting the ground.

[0006] S4, according to the layered requirements, first using the sampling cylinder to take a remolded soil sample of a certain depth, and placing the soil sample on the adhesive tape.

[0007] S5, using the metal rod to compact the soil sample to the target density, which is usually the standard penetration or the standard density.

[0008] S6, again using the sampling cylinder to take the next layer of soil sample above the compacted soil sample, and compacting according to the same method.

[0009] S7, repeating the above steps until all the required layers of soil samples are collected.

[0010] S8, taking out each layer of compacted soil sample, and measuring its density, water content and other properties by using the corresponding tools (such as the sand density cylinder).

[0011] S9, according to the experimental requirements, carrying out subsequent physical and chemical property tests or storage on the sample.

[0012] It should be noted that the compaction method uses mechanical force to compact the soil sample, which has a large deformation and damage to the soil sample, and therefore, the experimental purpose and the selected soil sample need to be reasonably considered and selected. In addition, when the compaction method is used to prepare the soil sample, the compaction method, the compaction times and the compaction strength and other parameters need to be strictly controlled to ensure the reliability and repeatability of the sample.

[0013] When preparing the soil sample, the compaction method requires that the soil material is first placed in the sample preparation cylinder, and then a metal rod is used to strike each layer of soil in turn, so that the soil layers are gradually compacted and form an integrated soil sample. However, if the connection between different layers of soil material after compaction is not tight enough, or the surface of the previous layer of soil is not fully scored before adding the next layer of soil material, it is easy to cause the soil sample to break or separate, affecting the quality of the sample.

[0014] Therefore, the surface of the soil layer needs to be scored after each compaction, which can better connect the soil material added next time with the previous layer of soil, thereby avoiding the breakage and separation of the soil sample and improving the quality of the sample. At the same time, this method can also make the compaction of the soil sample uniform, ensuring the representativeness of the sample.

[0015] However, the above-mentioned manual scoring method is not only time-consuming and labor-intensive, but also has a large deviation in the scoring depth of each layer of soil after compaction and the area involved in the scoring on the surface of the soil layer, resulting in different interlayer contact areas of each soil sample, different adhesion viscosities between adjacent layers, and affecting the quality of the prepared remolded soil sample. SUMMARY

[0016] To solve the technical problems mentioned in the background art, the present application provides a remolded soil sample preparation device.

[0017] The present application adopts the following technical scheme: a remolded soil sample preparation device, comprising a base, a lower plate capable of supporting a sample preparation cylinder is arranged on the top of the base, an upper plate is oppositely suspended above the lower plate, and a loading mechanism is arranged on the upper plate.

[0018] The loading mechanism comprises a loading plate, a scoring assembly and a moving assembly, the loading plate can move axially in the sample preparation cylinder, the scoring assembly and the moving assembly are both accommodated in the loading plate, the moving assembly is driven to move downward by the loading plate, which can first drive the scoring assembly to extend to the outside of the bottom of the loading plate to press the surface of the soil layer, and then drive the loading plate to rotate circumferentially as a whole.

[0019] As a further improvement of the above-mentioned scheme, a first surrounding groove plate is arranged on the top of the lower plate, the bottom of the sample preparation cylinder is clamped in the first surrounding groove plate, a second surrounding groove plate is arranged on the bottom of the upper plate, the top of the sample preparation cylinder is clamped in the second surrounding groove plate, and a plurality of positioning rods are arranged between the upper plate and the lower plate.

[0020] As a further improvement of the above-mentioned scheme, the top of the lower plate inside the first surrounding groove plate is sequentially stacked from bottom to top with a water-permeable stone and a filter paper.

[0021] As a further improvement of the above-mentioned scheme, a anti-tilting plate is movably suspended above the loading plate, and a pressure rod is arranged on the top of the anti-tilting plate.

[0022] As a further improvement of the above-mentioned solution, the action mechanism comprises a barrel, a first action assembly, a second action assembly and a third action assembly, which are all arranged on the barrel, a connecting rod is inserted into the top of the barrel, the top end of the connecting rod is fixed to the bottom of the anti-tilt plate, the first action assembly is driven by the axial movement of the connecting rod to rotate the barrel, the second action assembly is driven by the rotation of the barrel to extend the scribing assembly outside the bottom of the loading plate, and the third action assembly is driven by the rotation of the barrel to rotate the loading plate circumferentially.

[0023] As a further improvement of the above-mentioned solution, the first action assembly comprises a first limiting block arranged on the outer side wall of the connecting rod, a first movable slot is formed in the top of the barrel, and a first limiting slot in a spiral shape is axially formed in the slot wall of the first movable slot.

[0024] As a further improvement of the above-mentioned solution, a first spring is sleeved outside the connecting rod, and the two ends of the first spring are respectively lapped on the bottom of the anti-tilt plate and the top of the barrel.

[0025] As a further improvement of the above-mentioned solution, the second action assembly comprises a screw rod, a second movable slot is formed in the bottom of the barrel, the top of the screw rod is threadedly inserted into the second movable slot, and the bottom of the screw rod is connected with the scribing assembly.

[0026] As a further improvement of the above-mentioned solution, the third action assembly comprises a second limiting block fixed to the outer circumferential side of the barrel, a third movable slot is formed in the top of the loading plate, the barrel is clamped on the third movable slot, a second limiting slot with a length of three-fourths of the circumference is formed in the inner circumferential side of the third movable slot, and the second limiting block is slidingly clamped in the second limiting slot.

[0027] As a further improvement of the above-mentioned solution, the scribing assembly comprises a moving plate, the top center of the moving plate is fixedly connected with the bottom of the screw rod, a second telescopic rod is arranged between the bottom of the moving plate and the cavity wall in the loading plate, a nail head is arranged on the bottom of the moving plate, and a through slot is reserved on the bottom of the loading plate for the nail head to extend out.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] 1. The remolded soil sample preparation device can automatically and conveniently realize the compaction of the soil layer, the drilling of the nail head into the soil layer and the rotation of the loading plate to evenly scribe the surface of the soil layer, thereby avoiding deviation and ensuring the quality of the prepared remolded soil sample.

[0030] 2. The soil remolding sample preparation device of the present invention, by setting components such as a first telescopic rod, a first gear, and a second gear, can drive some nail heads to rotate and drill into the soil layer while the cylinder rotates and the moving plate moves down, thereby improving the nail head penetration efficiency, especially for harder soil layers with better scratching effect. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 for Figure 1 A partial cross-sectional structural diagram of components such as the loading plate and cylinder in their initial state;

[0033] Figure 3 for Figure 2 A partial cross-sectional structural diagram of components such as the loading plate and cylinder in another state;

[0034] Figure 4 for Figure 2 A partial cross-sectional structural diagram of components such as the loading plate and cylinder in another state;

[0035] Figure 5 for Figure 2 A schematic diagram of the distribution of the first limiting groove inside the cylinder after axial shearing, laying, and unfolding along the outer side of the cylinder.

[0036] Figure 6 for Figure 2 A schematic diagram of the cross-sectional structure of the middle cylinder being rotatably inserted onto the loading plate;

[0037] Figure 7 for Figure 4 Enlarged structural diagram at point A in the middle.

[0038] Explanation of key symbols:

[0039] 1. Base; 2. Lower plate; 3. Upper plate; 4. First surrounding groove plate; 5. Second surrounding groove plate; 6. Sample tube; 7. Positioning rod; 8. Through hole; 9. Loading plate; 10. Connecting rod; 11. Anti-tilting plate; 12. Pressure rod; 13. Cylinder body; 14. First movable groove; 15. Second movable groove; 16. First limiting groove; 17. First limiting block; 18. Third movable groove; 19. Second limiting groove; 20. Second limiting block; 21. Screw; 22. First telescopic rod; 23. Moving plate; 24. Second telescopic rod; 25. Nail head; 26. First gear; 27. Second gear; 28. First spring; 29. ​​Through groove; 30. Baffle. Detailed Implementation

[0040] Further description will be made to the application in combination with the drawings and specific embodiments, and it should be noted that the embodiments described below or the technical features between the embodiments can be combined to form new embodiments without conflict.

[0041] Embodiment 1

[0042] Please combine Figures 1 to 7 The soil sample preparation device comprises a base 1, a lower plate 2 provided on the top of the base 1 and capable of supporting a sample preparation cylinder 6, and an upper plate 3 provided opposite to the lower plate 2 and capable of being suspended above the lower plate 2. A loading mechanism is arranged on the upper plate 3.

[0043] The loading mechanism comprises a loading plate 9, a scribing assembly and a moving assembly. The loading plate 9 is axially movable in the sample preparation cylinder 6. The scribing assembly and the moving assembly are both accommodated in the loading plate 9. The moving assembly is driven to move downward by the loading plate 9, and can first drive the scribing assembly to extend to the outside of the bottom of the loading plate 9 to press the surface of the soil layer, and then drive the loading plate 9 to rotate circumferentially.

[0044] The top of the lower plate 2 is provided with a first surrounding groove plate 4, and the bottom of the sample preparation cylinder 6 is clamped in the first surrounding groove plate 4. The bottom of the upper plate 3 is provided with a second surrounding groove plate 5, and the top of the sample preparation cylinder 6 is clamped in the second surrounding groove plate 5. A plurality of positioning rods 7 are arranged between the upper plate 3 and the lower plate 2 to facilitate the installation and positioning of the sample preparation cylinder 6.

[0045] The top of the lower plate 2 inside the first surrounding groove plate 4 is sequentially stacked with a water-permeable stone and a filter paper from bottom to top.

[0046] A anti-tilting plate 11 is movably suspended above the loading plate 9, and a pressurizing rod 12 is arranged on the top of the anti-tilting plate 11.

[0047] The moving mechanism comprises a cylinder 13, a first moving assembly, a second moving assembly and a third moving assembly which are all arranged on the cylinder 13. The top of the cylinder 13 is inserted with a connecting rod 10, the top end of the connecting rod 10 is fixed to the bottom of the anti-tilting plate 11, the first moving assembly is driven to move downward axially by the connecting rod 10, and can drive the cylinder 13 to rotate, the second moving assembly is driven to rotate by the cylinder 13, and can drive the scribing assembly to extend to the outside of the bottom of the loading plate 9, and the third moving assembly is driven to rotate by the cylinder 13, and can drive the loading plate 9 to rotate circumferentially.

[0048] The first moving assembly comprises a first limiting block 17 arranged on the outer side wall of the connecting rod 10. The top of the cylinder 13 is provided with a first movable groove 14 which is inserted and matched with the connecting rod 10. A first limiting groove 16 in a spiral shape is axially arranged on the groove wall of the first movable groove 14.

[0049] A first spring 28 is sleeved outside the connecting rod 10, and the two ends of the first spring 28 are respectively lapped on the bottom of the anti-tilting plate 11 and the top of the cylinder 13. The first spring 28 can help the connecting rod 10 to reset after being pressed.

[0050] The second action assembly comprises a screw rod 21, the bottom of the barrel 13 is provided with a second movable slot 15, the top of the screw rod 21 is threadedly inserted into the second movable slot 15, and the bottom of the screw rod 21 is connected with the scratching assembly.

[0051] The third action assembly comprises a second limiting block 20 fixed to the outer circumferential side of the barrel 13, the top of the loading plate 9 is provided with a third movable slot 18, the barrel 13 is rotationally clamped on the third movable slot 18, the inner circumferential side of the third movable slot 18 is provided with a second limiting slot 19 with a length of three quarters of a circle, and the second limiting block 20 is slidingly clamped in the second limiting slot 19.

[0052] The scratching assembly comprises a moving plate 23, the top center of the moving plate 23 is fixedly connected with the bottom of the screw rod 21, the second telescopic rod 24 is arranged between the bottom of the moving plate 23 and the cavity wall of the loading plate 9, the bottom of the moving plate 23 is provided with a nail head 25, and the bottom of the loading plate 9 is reserved with a through slot 29 for the nail head 25 to extend out.

[0053] The working principle of the embodiment is as follows:

[0054] Firstly, the water permeable stone and the filter paper are placed in the groove on the lower plate 2 surrounded by the first groove plate 4, the sample preparation cylinder 6 and the upper plate 3 are sequentially placed upward, the sample preparation cylinder 6 is buckled into the groove surrounded by the second groove plate 5, and the upper plate 3 and the lower plate 2 are fixed by the positioning rod and the threaded head. Secondly, the sample slurry is prepared. The dry kaolin is weighed and added with distilled water to prepare a dilute slurry with a liquid limit. Thirdly, the dilute slurry is poured into the sample preparation cylinder 6, that is, the dilute slurry is poured into the sample preparation cylinder 6 through the through hole 8 of the upper plate 3. Then the loading plate 9 is placed in the opening at the top of the barrel 13, the loading plate 9 is loaded by the pressing rod 12, and the above steps are repeated to press the remolded soil sample layer by layer.

[0055] During the process, when the pressing rod 12 drives the anti-inclination plate 11, the connecting rod 10 and the loading plate 9 to move downward, when the bottom of the loading plate 9 contacts the top surface of the soil layer, as the pressing rod 12 continues to press, the loading plate 9 is supported by the supporting force from the top surface of the soil layer, at this time, the bottom of the connecting rod 10 extends into the first movable slot 14, driving the first limiting block 17 to frictionally extrude the groove wall of the first limiting slot 16 in a spiral shape, forcing the barrel 13 to rotate circumferentially to make it threadedly interact with the screw rod 21, so that the screw rod 21 extends out of the second movable slot 15 to drive the moving plate 23 to move downward until the nail head 25 extends to the outside of the bottom of the loading plate 9, so that the nail head 25 is inserted into the soil layer, and as the second limiting block 20 rotates with the barrel 13, the second limiting block 20 rotates from one end to the other end of the second limiting slot 19, and then the second limiting block 20 is blocked by the groove wall at the other end of the second limiting slot 19, so that the barrel 13 cannot continue to rotate relatively in the third movable slot 18.

[0056] At this time, as the pressing rod 12 continues to press the loading plate 9, the connecting rod 10 continues to rub and extrude the groove wall of the first limiting groove 16 through the first limiting block 17, and then the barrel 13 drives the loading plate 9 to rotate circumferentially as a whole through the second limiting block 20, so that the nail head 25 at the bottom of the loading plate 9 scratches the soil layer.

[0057] After the scratching is completed, the pressing on the pressing rod 12 is released, the elastic force of the first spring 28 is released to push the connecting rod 10, the loading plate 9, the moving plate 23 and the nail head 25 to return to the initial position, and then the loading plate 9 is moved out of the sample preparation cylinder 6, the next layer of soil to be pressed is added on the scratched soil layer in the sample preparation cylinder 6, and the above steps are repeated to press and scratch the next layer of soil, until the required remolded soil sample is prepared.

[0058] Embodiment 2

[0059] Please combine Figures 1 to 7 The embodiment is an improved scheme of embodiment 1, in order to further improve the scratching effect on the soil layer, a first gear 26 is arranged in the moving plate 23, and a plurality of second gears 27 meshing with the first gear 26 are arranged circumferentially around the first gear 26, and the center of each second gear 27 is fixedly connected with the top of a nail head 25, so that the nail head 25 can rotate to improve the soil breaking effect, and the remaining nail heads do not rotate.

[0060] The first telescopic rod 22 is fixed on the top wall of the second movable groove 15, and the first telescopic rod 22 extends into the moving plate 23 through the screw rod 21 to be fixed with the center of the first gear 26.

[0061] Two opposite baffles 30 are elastically connected in each through groove 29, and the second spring is arranged between the side of the two baffles 30 away from each other and the groove wall of the through groove 29. When the second spring is in a non-deformation state, the two baffles 30 are in contact with each other to completely close the through groove 29.

[0062] The top of the opposite side of the baffle 30 has a slope surface inclined towards the center from top to bottom, when the nail head 25 enters the through groove 29, the side wall of the nail head 25 will extrude the slope surface of the baffle 30, forcing the two baffles 30 to separate from each other, and the through groove 29 is unblocked, so that the nail head 25 can penetrate out to the outside of the bottom of the loading plate 9 and drill into the soil layer.

[0063] When the barrel 13 rotates and the moving plate 23 is lowered by the screw rod 21, the first gear 26 and the plurality of second gears 27 will be rotated by the first telescopic rod 22, and then the plurality of nail heads 25 corresponding to the second gears 27 will rotate, so that the nail head 25 can drill into the soil layer under pressure.

[0064] In summary, the remolded soil sample preparation device of the present embodiment can sequentially complete the compaction of the soil layer by the loading plate 9, the drilling of the soil layer by the nail head 25 (part of the nail head 25 rotates to mark the soil layer), and the rotation of the nail head 25 by the loading plate 9 to mark the surface of the soil layer, only by the downward pressure of the pressure rod 12, which is convenient and reliable.

[0065] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A soil remolding sample preparation device, characterized in that, Includes a base, the top of which is provided with a lower plate that can support the sample tube, and an upper plate is suspended directly above the lower plate, and a loading mechanism is provided on the upper plate; The loading mechanism includes a loading plate, a scribing component, and an actuating component. The loading plate can move axially within the sample preparation cylinder. The scribing component and the actuating component are both housed within the loading plate. The actuating component is driven by the downward movement of the loading plate, which can first drive the scribing component to extend to the outer bottom of the loading plate to press against the soil surface, and then drive the entire loading plate to rotate circumferentially. The scribing assembly includes a movable plate, the top center of which is fixedly connected to the bottom of a screw. A second telescopic rod is provided between the bottom of the movable plate and the cavity wall of the loading plate. Nail heads are arranged on the bottom of the movable plate, and a through groove is reserved on the bottom of the loading plate for the nail heads to extend out. A rotatable first gear is provided inside the movable plate, and multiple second gears that mesh with the first gear are arranged around the circumference of the first gear. The center of each second gear is inserted and fixed to the top of a nail head. A first telescopic rod is fixed on the top wall of the second movable groove. The first telescopic rod passes through the screw and extends into the movable plate to be fixed at the center of the first gear. Each through slot has two opposing baffles that are elastically connected. A second spring is provided between the opposing side of the two baffles and the slot wall. When the second spring is in a non-deformed state, the two baffles contact each other and completely seal the through slot. The top of the opposing side of the two baffles has a slope that slopes from top to bottom inward. An anti-tilt plate is movably suspended above the loading plate, and a pressure rod is provided on the top of the anti-tilt plate; The actuation assembly includes a cylinder and a first actuation assembly, a second actuation assembly, and a third actuation assembly, all disposed on the cylinder. A connecting rod is inserted into the top of the cylinder, and the top end of the connecting rod is fixed to the bottom of the anti-tilt plate. The first actuation assembly is driven by the axial downward movement of the connecting rod, which can drive the cylinder to rotate. The second actuation assembly is driven by the rotation of the cylinder, which can drive the scribing assembly to extend to the outer side of the bottom of the loading plate. The third actuation assembly is driven by the rotation of the cylinder, which can drive the loading plate to rotate circumferentially. The third action component includes a second limiting block fixed to the outer periphery of the cylinder, a third movable groove is provided on the top of the loading plate, the cylinder is rotatably locked in the third movable groove, a second limiting groove with a circumference of three-quarters is provided on the inner periphery of the third movable groove, and the second limiting block is slidably locked in the second limiting groove.

2. The remolded soil sample preparation device as described in claim 1, characterized in that, The lower plate is provided with a first surrounding groove plate at the top, and the bottom of the sample preparation cylinder is locked in the first surrounding groove plate. The upper plate is provided with a second surrounding groove plate at the bottom, and the top of the sample preparation cylinder is locked in the second surrounding groove plate. Multiple positioning rods are provided between the upper plate and the lower plate.

3. The remolded soil sample preparation device as described in claim 2, characterized in that, The bottom plate, located inside the first trough plate, has permeable stones and filter paper stacked sequentially from bottom to top on its top.

4. The remolded soil sample preparation device as described in claim 3, characterized in that, The first actuating component includes a first limiting block disposed on the outer wall of the connecting rod, and a first movable groove that engages with the connecting rod is provided on the top of the cylinder, and a first limiting groove in a spiral shape is provided axially on the groove wall of the first movable groove.

5. The remolded soil sample preparation device as described in claim 4, characterized in that, A first spring is sleeved on the outside of the connecting rod, and the two ends of the first spring are respectively attached to the bottom of the anti-tilt plate and the top of the cylinder.

6. The remolded soil sample preparation device as described in claim 3, characterized in that, The second actuating component includes a screw, a second movable groove is provided at the bottom of the cylinder, the top of the screw is threaded into the second movable groove, and the bottom of the screw is connected to the scribing component.

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