Device capable of realizing stratified sample compaction on any inclined plane

Abstract

The utility model discloses a sample compaction device capable of realizing layering of any inclined plane, which belongs to the technical field of rock and soil tests and comprises a sample preparation barrel, the lower end of the sample preparation barrel is fixed on a chassis, and a compaction component is arranged in the sample preparation barrel; the compaction assembly comprises a handle, one end of the handle is rotatably connected with a fixed disc, and the upper surface edge of the fixed disc is hinged with a fixed rod; a plurality of adjusting holes are formed in the fixing rod, a fixing hole is formed in the handle, and the fixing rod is connected with the handle through an adjusting bolt; the fixed disc is fixedly connected with the compaction disc; and the inclined angles theta between the side surfaces and the lower surfaces of the compaction discs are different. A plurality of compaction discs with different inclination angles theta between the side surfaces and the lower surface are arranged, so that the compaction discs are in close contact with a sample preparation barrel, and a fixed disc capable of adjusting the angle relative to a handle is also arranged, so that the compaction discs are detachably connected with the fixed disc; soil samples with different inclination angles can be prepared by adjusting the angle between the fixed disc and the handle and selecting the compaction disc with the corresponding inclination angle to be connected with the fixed disc.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical testing technology, specifically relating to a device that can achieve compaction of layered samples on any inclined plane. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Permafrost on steep slopes and its subgrade in high-altitude, cold mountainous areas suffers from severe asymmetry due to steep slopes and numerous influencing factors. This leads to uneven subgrade settlement, pavement cracking, and even landslides, significantly impacting the operational stability of road engineering projects. A systematic study of the freeze-thaw deformation characteristics of steep-slope permafrost and the mechanisms of subgrade damage is urgently needed. Therefore, researching the frost heave and compression of soil samples from steep-slope permafrost and its subgrade is of significant theoretical importance.

[0004] In practical applications of geotechnical engineering, it is not easy to obtain undisturbed soil on site. Therefore, in order to obtain test parameters of the physical and mechanical properties of soil, it is necessary to prepare remolded soil indoors. In the prior art, patent CN211453612U discloses a test device for high-precision preparation of remolded soil samples. Its compaction guide rod passes through the top stabilizing plate and is connected to the compaction plate. The compaction guide rod is in an absolutely vertical position, so that the compaction surface formed is flat.

[0005] The soil sample layering and compaction device described in the above scheme can only prepare vertical cylindrical soil samples, and cannot prepare inclined cylindrical samples that are closer to the experimental simulation environment, nor can it change the angle of inclination of the prepared soil samples. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a compaction device for layered samples on arbitrary slopes. It is equipped with multiple compaction discs with different inclination angles θ between the side and the bottom surface, ensuring close contact between the compaction discs and the sample preparation container. It also includes a fixed disc whose angle relative to the handle can be adjusted, allowing for detachable connection between the compaction discs and the fixed disc. By adjusting the angle between the fixed disc and the handle, and selecting a compaction disc with the appropriate inclination angle to connect with the fixed disc, soil samples with different inclination angles can be prepared.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A device for compacting stratified samples on arbitrary slopes includes a sample preparation barrel, the lower end of which is fixed to a base plate, and a compaction component is installed inside the sample preparation barrel.

[0009] The compaction assembly includes a handle, one end of which is rotatably connected to a fixed plate. A fixed rod is hinged to the edge of the upper surface of the fixed plate. The fixed rod has multiple adjustment holes, and the handle has one fixed hole. The fixed rod and the handle are connected by an adjustment bolt. The fixed plate is fixedly connected to the compaction plate.

[0010] The compaction discs are multiple, and the angle θ between the side and the lower surface of each compaction disc is different.

[0011] Preferably, the spacing between the plurality of adjustment holes can change the angle between the fixed plate and the handle, so that the angle between the upper surface of the fixed plate and the handle is equal to the tilt angle θ of the corresponding striking plate.

[0012] Preferably, the multiple compaction discs have different diameters, but the side of each compaction disc is in contact with the inner wall of the sample preparation container.

[0013] Preferably, the chassis is larger than the sample preparation container; the diameter of the fixing plate is smaller than the diameter of the sample preparation container.

[0014] Preferably, the fixed plate has an adapter groove at its center, and two adapter holes are symmetrically arranged on the side wall of the adapter groove; one end of the handle is an adapter ball head, and a connecting hole is provided on the adapter ball head for the pin body of the double-ended spring pin to pass through; the diameter of the adapter hole is the same as the diameter of the pin head of the double-ended spring pin; the diameter of the adapter groove is the same as the length of the pin body of the double-ended spring pin.

[0015] Preferably, the upper surface edge of the fixed plate is provided with two ear plates, the distance between the ear plates is slightly larger than that of the fixed rod, the ear plates are provided with hinge holes, and the fixed rod is also provided with hinge holes. The fixed rod and the fixed plate are connected by a hinge pin so that the two are hinged.

[0016] Preferably, both the fixing plate and the compacting plate are provided with multiple fixing bolt holes for fixing bolts to pass through, and the multiple fixing bolt holes are evenly arranged with the center of the fixing plate or the compacting plate as the center.

[0017] Preferably, the fixing bolt hole has internal threads, and the length of the fixing bolt is equal to the thickness of the compaction plate and the fixing plate.

[0018] Preferably, the compaction disc is placed on the lower surface of the fixed disc to fit together, so that the holes of each fixing bolt are aligned vertically, and the fixing bolts are passed through for fixation.

[0019] Preferably, the handle is kept perpendicular to the base.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are:

[0021] This invention features multiple compaction discs with different side and lower surface inclination angles θ, ensuring close contact between the compaction discs and the sample preparation container. It also includes a fixed disc whose angle relative to the handle can be adjusted, allowing for detachable connection between the compaction discs and the fixed disc. By adjusting the angle between the fixed disc and the handle, and selecting a compaction disc with the appropriate inclination angle to connect with the fixed disc, it is possible to prepare soil samples with different inclination angles. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a schematic diagram of the compaction device according to an embodiment of the present invention;

[0024] In the picture:

[0025] 1. Sample container; 2. Base plate; 3. Handle; 4. Fixing plate; 5. Fixing rod; 6. Adjusting bolt; 7. Compacting plate; 8. Fixing bolt. Detailed Implementation

[0026] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a device for compacting stratified samples on arbitrary inclined planes, such as... Figure 1 As shown, it includes a sample preparation container 1, the lower end of which is fixed to a base plate 2. The sample preparation container 1 is used to place the soil sample to be prepared. The base plate 2 is larger than the sample preparation container 1 to ensure the stability of the sample preparation container 1.

[0028] like Figure 1 As shown, it also includes a compaction assembly, which includes a handle 3. One end of the handle 3 is rotatably connected to a fixed plate 4, the diameter of which is smaller than the diameter of the sample preparation container 1. An adapter groove is formed at the center of the fixed plate 4, sharing a common center with the fixed plate 4. Two adapter holes are symmetrically arranged on the side wall of the adapter groove, centered on the center. The end of the handle 3 connected to the fixed plate 4 is an adapter ball head, with a connecting hole for the double-ended spring pin to pass through. It can be understood that the diameter of the adapter hole is the same as the diameter of the double-ended spring pin head; the diameter of the adapter groove is the same as the length of the double-ended spring pin head. When the adapter ball head is snapped into the adapter groove, the double-ended spring pin head is engaged in the adapter hole, thus achieving a rotatable connection between the handle 3 and the fixed plate 4. In some implementations, an adapter plate can be set at the center of the fixed plate 4, and an adapter hole can be set on the adapter plate. One end of the handle 3 does not need to be set with a ball head, but only a connection hole is set. The handle 3 and the fixed plate 4 can be rotatably connected by using an adapter bolt through the connection hole and the adapter hole. It can be understood that the diameter of the adapter bolt is slightly smaller than the connection hole so that the handle can rotate.

[0029] like Figure 1As shown, the handle 3 also has a fixing hole for connecting the adjusting bolt 6. A fixing rod 5 is hinged to the upper surface edge of the fixing plate 4. The hinge between the fixing plate 4 and the fixing rod 5 uses existing technology. For example, in some embodiments, two ear plates are provided on the upper surface edge of the fixing plate 4, the distance between the ear plates being slightly larger than that of the fixing rod 5. Hinge holes are provided on the ear plates, and the fixing rod 5 also has hinge holes. A hinge pin connects the fixing rod 5 and the fixing plate 4, enabling them to be hinged and allowing the fixing rod to rotate relative to the fixing plate. In other embodiments, an adapter groove can also be provided on the upper surface edge of the fixing plate 4, and an adapter ball joint can be provided at one end of the fixing rod 5 and the fixing plate 4, connected using a double-ended spring pin. Further details are omitted here.

[0030] like Figure 1 As shown, the handle 3 and the fixed rod 5 are connected by the adjusting bolt 6. It can be understood that the fixed rod 5 has multiple adjusting holes on its body. By connecting different adjusting holes with the fixing holes of the handle 3, the angle between the fixed plate 4 and the handle 3 can be adjusted.

[0031] like Figure 1 As shown, the fixed plate 4 has multiple fixing bolt holes for the fixing bolts 8 to pass through. The multiple fixing bolt holes are evenly arranged on the fixed plate 4 with the center of the fixed plate 4 as the center, and the distance from the fixing bolt holes to the center of the fixed plate is the same.

[0032] like Figure 1 As shown, multiple fixing bolt holes are also provided on the compaction plate 7 for the fixing bolts 8 to pass through. The multiple fixing bolt holes are evenly distributed on the compaction plate 7 with the center of the compaction plate 7 as the center, and the distance from the fixing bolt holes to the center of the compaction plate 7 is the same. The compaction plate 7 is placed on the lower surface of the fixing plate 4 to fit together, so that the fixing bolt holes are aligned vertically, and then the fixing bolts 8 are passed through to fix it.

[0033] It is understandable that the fixing bolt hole has internal threads, and the length of the fixing bolt 8 is equal to the thickness of the compacting plate and the fixing plate. The advantage of this setting is that no nut is needed. The fixing bolt 8 passes through the fixing plate and the compacting plate, and the bottom of the fixing bolt 8 is on the same plane as the bottom of the compacting plate.

[0034] like Figure 1 As shown, the angle between the side and the lower surface of the compaction plate 7 is θ. The side of the compaction plate 7 is in contact with the inner wall of the sample preparation container 1. Therefore, the side of the compaction plate 7 is perpendicular to the horizontal plane. The lower surface of the compaction plate 7 is the top surface of the soil sample. The angle between the top surface of the soil sample and the inner wall of the sample preparation container (i.e., the side of the compaction plate) is called the top surface angle of the soil sample. In other words, the angle between the top surface of the soil sample and the horizontal plane plus the angle θ between the lower surface and the side of the compaction plate equals 90°.

[0035] Based on the required angle of the top surface of the soil sample, such as the angle between the top surface of the soil sample and the horizontal plane plus the angle θ between the lower surface and the side of the compaction plate, which is equal to 90°, a set of compaction plates 7 with inclination angles of θ1, θ2... between the side and the lower surface of the compaction plate are prefabricated. It is understood that because the angle θ between the lower surface and the side of the compaction plate is different, the diameter of the compaction plates 7 in the same set is not the same, but it is necessary to ensure that the side of the compaction plate 7 can fit and contact the inner wall of the sample preparation container.

[0036] It is also understandable that, as mentioned above, the fixing rod 5 has multiple adjustment holes on its body. These holes connect to the fixing holes of the handle 3, allowing adjustment of the angle between the fixing plate 4 and the handle 3. The multiple adjustment holes on the fixing rod 5 are used to install different angled compaction plates, requiring that the angle between the upper surface of the fixing plate 4 and the handle 3 be equal to θ1, θ2, etc. For example, with 10 adjustment holes, starting from the end closest to the fixing plate, they are respectively θ1 adjustment hole, θ2 adjustment hole, etc. When the required tilt angle between the handle and the fixing plate is θ2, the θ2 adjustment hole is connected to the fixing hole using the adjusting bolt 6. It is important to note that during adjustment, the handle 3 must remain perpendicular to the base 2.

[0037] Connect the fixing hole of handle 3 to the different adjustment holes on the body of the fixing rod 5, adjust the angle between the fixing plate 4 and handle 3, and then select a compaction plate with the side and the lower surface having the corresponding angle. Connect the compaction plate and the fixing plate with fixing bolts so that the two together form a compaction hammer with an inclined compaction surface. During the compaction operation, handle 3 is vertical so that the upper surface of the soil sample is subjected to uniform impact force.

[0038] When preparing soil samples at other angles, remove the compaction disc at the current angle, and adjust the connection between the fixing hole of handle 3 and the other adjustment holes on the fixing rod 5. Adjust the angle between the fixing disc and the handle, and finally replace it with a compaction disc at a different angle. Because the compaction disc angle is adjustable and it is in close contact with the sample preparation container, the compaction force on the soil sample surface is uniform, which can prepare a uniform density inclined cylindrical soil sample that better reflects the actual soil density distribution.

[0039] Working principle:

[0040] When the top surface angle of the soil sample to be prepared is 90°-θ1, select the compaction plate corresponding to the angle θ1, and then connect the adjustment hole on the fixed rod 5 to the fixed hole of the handle 3 to adjust the included angle between the fixed plate and the handle to θ1.

[0041] Then connect the compaction plate corresponding to angle θ1 to the fixed plate with bolts;

[0042] Next, soil samples collected from the experimental area are placed in layers into the sample preparation container;

[0043] During the process of layering and placing the soil sample, the connected compaction plate is placed into the sample preparation bucket to compact the soil sample in layers, and finally a columnar soil sample with a sloping top surface and uniform density is prepared.

[0044] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A device for compacting stratified samples on arbitrary inclined planes, characterized in that, It includes a sample preparation container, the lower end of which is fixed to the chassis, and a compaction component is installed inside the sample preparation container; The compaction assembly includes a handle, one end of which is rotatably connected to a fixed plate. A fixed rod is hinged to the edge of the upper surface of the fixed plate. The fixed rod has multiple adjustment holes, and the handle has one fixed hole. The fixed rod and the handle are connected by an adjustment bolt. The fixed plate is fixedly connected to the compaction plate. The compaction discs are multiple, and the angle θ between the side and the lower surface of each compaction disc is different.

2. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The spacing between the plurality of adjustment holes can change the angle between the upper surface of the fixed plate and the handle, so that the angle between the fixed plate and the handle is equal to the tilt angle θ of the corresponding striking plate.

3. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The compaction discs have different diameters, but the side of each compaction disc is in contact with the inner wall of the sample preparation container.

4. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The chassis is larger than the sample preparation container; the diameter of the fixing plate is smaller than the diameter of the sample preparation container.

5. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The fixed plate has an adapter groove at its center, and two adapter holes are symmetrically arranged on the side wall of the adapter groove; one end of the handle is an adapter ball head, and a connecting hole is provided on the adapter ball head for the pin body of the double-ended spring pin to pass through; the diameter of the adapter hole is the same as the diameter of the pin head of the double-ended spring pin; the diameter of the adapter groove is the same as the length of the pin body of the double-ended spring pin.

6. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The upper surface edge of the fixed plate is provided with two ear plates, the distance between the ear plates is slightly larger than that of the fixed rod, the ear plates are provided with hinge holes, and the fixed rod is also provided with hinge holes. The fixed rod and the fixed plate are connected by a hinge pin, so that the two are hinged.

7. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, Both the fixing plate and the compaction plate are provided with multiple fixing bolt holes for fixing bolts to pass through. The multiple fixing bolt holes are evenly arranged with the center of the fixing plate or the compaction plate as the center.

8. The device for compacting stratified samples on arbitrary slopes as described in claim 7, characterized in that, The fixing bolt hole has internal threads, and the length of the fixing bolt is equal to the thickness of the compaction plate and the fixing plate.

9. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The compaction disc is placed on the lower surface of the fixed disc to fit together, so that the holes of each fixing bolt are aligned vertically, and the fixing bolts are passed through for fixation.

10. The device for compacting stratified samples on arbitrary slopes as described in claim 1, characterized in that, The handle remains perpendicular to the base.

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