Compacted soil column preparation device

Abstract

The utility model discloses a compacted soil soil column preparation device, including the bottom plate, a pair of threaded vertical rods is connected perpendicularly on the bottom plate, a pair of threaded vertical rods are equipped with truss beam, and truss beam is fixed on a pair of threaded vertical rods through two pairs of fixed nuts. Threaded holes are arranged in the middle of truss beam and are connected with screw threads, and the bottom end of screw rod is fixed with support bearing. The bottom surface of support bearing is fixedly connected with circular steel plate, and the bottom surface of circular steel plate is fixedly connected with ejector rod. The bottom of circular steel plate is also vertically fixedly connected with fixing frame, and the side of fixing frame close to ejector rod is provided with digital display displacement meter. The end of telescopic rod of ejector rod is fixedly connected with circular pressing plate, and soil column cylinder is placed on the bottom plate below circular pressing plate. The problem that the compaction density cannot be accurately controlled in the prior art, resulting in poor uniformity of the prepared soil column, is solved.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering technology and relates to a device for preparing compacted soil columns. Background Technology

[0002] Compacted soil columns are widely used in evaluating solute transport models, monitoring pollutant deposition and migration in soil, conducting evapotranspiration studies, and simulating water migration processes in unsaturated soils. The preparation of compacted soil columns often relies on specialized equipment for layered compaction. However, layered compaction leads to uneven compaction, and existing equipment struggles to effectively and accurately control the compaction density of the layered compacted soil during preparation. Furthermore, the process is cumbersome, time-consuming, and labor-intensive, resulting in poor uniformity of the prepared soil columns. This undoubtedly introduces significant initial errors into subsequent experiments, severely impacting the accuracy and reliability of the experimental results. Clearly, the traditional compacted soil column preparation process has significant shortcomings. Therefore, there is an urgent need for a compacted soil column preparation device with high precision in compaction control and convenient operation to meet the needs of relevant experimental research. Utility Model Content

[0003] The purpose of this invention is to provide a compacted soil column preparation device, which solves the problem in the prior art that the compaction density cannot be accurately controlled, resulting in poor uniformity of the prepared soil column.

[0004] The technical solution adopted by this utility model includes a base plate, on which a pair of threaded uprights are vertically connected. A truss beam is fitted on the pair of threaded uprights. The truss beam is fixed to the pair of threaded uprights by two pairs of fixing nuts. A threaded hole is opened in the middle of the truss beam and threadedly connected to the screw rod. A support bearing is fixed at the bottom end of the screw rod. A circular steel plate is fixed to the bottom surface of the support bearing. A top rod is fixed to the bottom surface of the circular steel plate. A fixing frame is also vertically fixed to the bottom of the circular steel plate. A digital displacement gauge is installed on the side of the fixing frame near the top rod. A circular pressure plate is fixed to the end of the telescopic rod of the top rod. A soil column is placed on the base plate directly below the circular pressure plate.

[0005] The features of this utility model also include:

[0006] The threaded pole is equipped with a display, which is electrically connected to the digital displacement gauge via a transmission line. The end of the pull rod of the digital displacement gauge is fixedly connected to the telescopic rod of the jack via a metal connecting piece.

[0007] The jack is a type of hydraulic jack, and it is connected to the hydraulic pump via an oil pipe.

[0008] The diameter of the circular pressure plate is the same as the inner diameter of the multiple soil column tubes.

[0009] The bodies of multiple soil columns are equipped with graduation lines.

[0010] Multiple soil columns can be coaxially installed and stacked, and the multiple soil columns are connected to each other through flanges and fastened with mounting bolts.

[0011] A crossbar runs through the shaft of the screw, and the crossbar is fastened to the screw.

[0012] The bottom end of the screw is fixed to the inner wall of the inner ring of the support bearing.

[0013] The beneficial effects of this utility model are:

[0014] 1. Precise control of compaction thickness: The digital displacement gauge can accurately reflect the displacement data of the telescopic rod, and accurately control the compaction thickness of the soil material during the compaction process to ensure that the soil column sample reaches the specified compaction degree.

[0015] 2. Easy to assemble and adjust: The truss beams and threaded uprights are connected with large nuts; the T-bolts are threaded to the truss beams, facilitating the height adjustment of the jacks and circular pressure plates. The entire device is easy to install and adjust. The soil column is composed of multiple soil columns installed end-to-end, secured with bolts at the joints. The soil columns are marked with graduations, effectively controlling and measuring height changes during the soil compaction process. This creates a monolithic compacted soil column. By layering and compacting the soil within the column, a monolithic compacted soil column meeting the requirements of subsequent tests can be formed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the soil column preparation device of this utility model;

[0017] Figure 2 This is a schematic diagram of the frame structure of the device of this utility model;

[0018] Figure 3 This is a schematic diagram of the screw structure;

[0019] Figure 4 This is a schematic diagram of the supporting bearing structure;

[0020] Figure 5 This is a schematic diagram of the overall structure of the jack, including the circular steel plate and the circular pressure plate.

[0021] Figure 6 This is a schematic diagram of the overall structure of a digital displacement gauge;

[0022] Figure 7 This is a schematic diagram of the installation structure of two soil column cylinders;

[0023] Figure 8 This is a schematic diagram of the structure for preparing the first soil column;

[0024] Figure 9 This is a schematic diagram of the structure for preparing the second soil column;

[0025] Figure 10 This is a schematic diagram of the structure for preparing the third soil column.

[0026] In the diagram, 1. Threaded upright; 2. Fixing nut; 3. Screw; 4. Truss beam; 5. Support bearing; 6. Circular steel plate; 7. Fixing frame; 8. Digital displacement gauge; 9. Transmission line; 10. Display; 11. Top rod; 12. Telescopic rod; 13. Circular pressure plate; 14. Oil pipe; 15. Hydraulic pump; 16. Flange; 17. Scale line; 18. Mounting bolt; 19. Soil column; 20. Base plate. Detailed Implementation

[0027] The following detailed description is provided in conjunction with specific implementation methods.

[0028] Example 1

[0029] See attached document Figure 1 and Figure 2 As shown, a pair of threaded uprights 1 are vertically welded to the base plate 20. A truss beam 4 is fixed to the pair of threaded uprights 1 by two pairs of fixing nuts 2. The truss beam 4 is sleeved on the pair of threaded uprights 1. The pair of fixing nuts 2 are threaded to the threaded uprights 1 and clamp the two ends of the truss beam 4 from top to bottom to fix it. The height of the truss beam 4 on the threaded uprights 1 can be adjusted by adjusting the position of the two pairs of fixing nuts 2. A threaded hole is opened in the middle of the truss beam 4, and a screw 3 is threaded through it. A crossbar passes through the body of the screw 3 and is fastened to the screw. The crossbar increases the torque, making it easier to rotate the screw 3.

[0030] refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the bottom end of the screw 3 is fixed to the support bearing 5, and the circumference of the bottom end of the screw 3 is fixed to the inner wall of the inner ring of the support bearing 5. The bottom end of the screw 3 does not extend out of the inner ring of the support bearing 5. A circular steel plate 6 is fixed to the bottom of the support bearing 5, and a top rod 11 is fixed to the bottom of the circular steel plate 6. When the screw 3 is rotated for adjustment, only the inner ring of the support bearing 5 is rotated, so that the up and down adjustment of the screw 3 can be converted into the adjustment of the height of the top rod 11. A circular pressure plate 13 is fixed to the bottom end of the telescopic rod 12 of the top rod 11. A soil column 19 is placed directly below the circular pressure plate 13 and placed on the base plate 20. A long strip-shaped fixing frame 7 is also vertically fixed to the bottom of the circular steel plate 6. A digital displacement meter 8 is installed on the side of the fixing frame 7 near the top rod 11. The distance that the telescopic rod 12 of the top rod 11 presses down on the circular pressure plate 13 can be measured and displayed by the digital displacement meter 8.

[0031] Example 2

[0032] See attached document Figure 1 and Figure 2As shown, a pair of threaded uprights 1 are vertically welded to the base plate 20. A truss beam 4 is fixed to the pair of threaded uprights 1 by two pairs of fixing nuts 2. The pair of fixing nuts 2 are threaded onto the threaded uprights 1, clamping the two ends of the truss beam 4 together to fix it. The height of the truss beam 4 on the threaded uprights 1 can be adjusted by adjusting the position of the two pairs of fixing nuts 2. A threaded hole is opened in the middle of the truss beam 4, and a screw rod 3 is threaded through it. A crossbar passes through the body of the screw rod 3 and is fastened to the screw rod. The crossbar increases the torque, making it easier to rotate the screw rod 3. (Reference) Figure 3 , Figure 4 and Figure 5 As shown, the bottom end of the screw 3 is fixed to the support bearing 5, and the circumference of the bottom end of the screw 3 is fixed to the inner wall of the inner ring of the support bearing 5. The bottom end of the screw 3 does not extend out of the inner ring of the support bearing 5. A circular steel plate 6 is fixed to the bottom of the support bearing 5, and a top rod 11 is fixed to the bottom of the circular steel plate 6, so that the up and down adjustment of the screw 3 can be converted into the adjustment of the height of the top rod 11. A circular pressure plate 13 is fixed to the bottom end of the telescopic rod 12 of the top rod 11. A soil column 19 is placed directly below the circular pressure plate 13. The soil column 19 is placed on the base plate 20. A soil sample with measurement is placed in the soil column 19. The circular pressure plate 13 presses down on the soil sample to complete the preparation of the soil column.

[0033] refer to Figure 1 and Figure 6 As shown, a long strip-shaped fixing frame 7 is vertically fixed to the bottom of the circular steel plate 6. A digital displacement meter 8 is installed on the side of the fixing frame 7 near the top rod 11. A display 10 is installed on the rod body of the screw rod. The display 10 and the digital displacement meter 8 are electrically connected through a transmission line 9. The end of the pull rod of the digital displacement meter 8 is fixedly connected to the rod body of the telescopic rod 12 of the top rod 11 through a metal connecting piece. When the telescopic rod 12 extends, it can pull the end of the pull rod of the digital displacement meter 8 through the metal connecting piece, thereby reflecting the extension length of the telescopic rod 12 to the digital displacement meter 8. The distance that the telescopic rod 12 of the top rod 11 presses down on the circular pressure plate 13 can be measured and displayed by the digital displacement meter 8 and the result is displayed on the display 10.

[0034] Example 3

[0035] See attached document Figure 1 and Figure 2 As shown, a pair of threaded uprights 1 are vertically welded to the base plate 20. A truss beam 4 is fixed to the pair of threaded uprights 1 by two pairs of fixing nuts 2. The pair of fixing nuts 2 are threaded onto the threaded uprights 1, clamping the two ends of the truss beam 4 together to fix it. The height of the truss beam 4 on the threaded uprights 1 can be adjusted by adjusting the position of the two pairs of fixing nuts 2. A threaded hole is opened in the middle of the truss beam 4, and a screw rod 3 is threaded through it. A crossbar passes through the body of the screw rod 3 and is fastened to the screw rod. The crossbar increases the torque, making it easier to rotate the screw rod 3. (Reference) Figure 3 , Figure 4 and Figure 5 As shown, the bottom end of the screw 3 is fixed to the support bearing 5, and the circumference of the bottom end of the screw 3 is fixed to the inner wall of the inner ring of the support bearing 5. The bottom end of the screw 3 does not extend out of the inner ring of the support bearing 5. A circular steel plate 6 is fixed to the bottom of the support bearing 5, and a push rod 11 is fixed to the bottom of the circular steel plate 6, so that the up and down adjustment of the screw 3 can be converted into the adjustment of the height of the push rod 11. A circular pressure plate 13 is fixed to the bottom end of the telescopic rod 12 of the push rod 11. The side of the push rod 11 is connected to the hydraulic pump 15 through the oil pipe 14. The push rod 11 can be adjusted by starting the hydraulic pump 15. The push rod can be specifically a jack.

[0036] refer to Figure 1 and Figure 7 As shown, a soil column 19 is placed directly below the circular pressure plate 13. The diameter of the circular pressure plate 13 is the same as the inner diameter of the soil column 19. The soil column 19 is provided with scale lines 17 on its body. The soil column 19 is placed on the base plate 20. A soil sample with measurement is placed in the soil column 19. The circular pressure plate 13 presses down on the soil sample to complete the preparation of the soil column.

[0037] refer to Figure 1 and Figure 6 As shown, a long strip-shaped fixing frame 7 is vertically fixed to the bottom of the circular steel plate 6. A digital displacement meter 8 is installed on the side of the fixing frame 7 near the top rod 11. A display 10 is installed on the rod body of the screw rod. The display 10 and the digital displacement meter 8 are electrically connected through a transmission line 9. The end of the pull rod of the digital displacement meter 8 is fixedly connected to the rod body of the telescopic rod 12 of the top rod 11 through a metal connecting piece. When the telescopic rod 12 extends, it can pull the end of the pull rod of the digital displacement meter 8 through the metal connecting piece, thereby reflecting the extension length of the telescopic rod 12 to the digital displacement meter 8. The distance that the telescopic rod 12 of the top rod 11 presses down on the circular pressure plate 13 can be measured and displayed by the digital displacement meter 8 and the result is displayed on the display 10.

[0038] Example 4

[0039] See attached document Figure 1 and Figure 2 As shown, a pair of threaded uprights 1 are vertically welded on the base plate 20. A truss beam 4 is fixed to the pair of threaded uprights 1 by two pairs of fixing nuts 2. The pair of fixing nuts 2 are threaded to the threaded uprights 1 to clamp the two ends of the truss beam 4 together and fix it. The height of the truss beam 4 on the threaded uprights 1 can be adjusted by adjusting the position of the two pairs of fixing nuts 2. A threaded hole is opened in the middle of the truss beam 4, and a screw 3 is threaded through it. A crossbar passes through the body of the screw 3 and is fastened to the screw. The crossbar increases the torque, making it easier to rotate the screw 3.

[0040] refer to Figure 1, Figure 3 , Figure 4 and Figure 5 As shown, the bottom end of the screw 3 is fixed to the support bearing 5, and the circumference of the bottom end of the screw 3 is fixed to the inner wall of the inner ring of the support bearing 5. The bottom end of the screw 3 does not extend out of the inner ring of the support bearing 5. A circular steel plate 6 is fixed to the bottom of the support bearing 5, and a push rod 11 is fixed to the bottom of the circular steel plate 6, so that the up and down adjustment of the screw 3 can be converted into the adjustment of the height of the push rod 11. A circular pressure plate 13 is fixed to the bottom end of the telescopic rod 12 of the push rod 11. The side of the push rod 11 is connected to the hydraulic pump 15 through the oil pipe 14. The push rod 11 can be adjusted by starting the hydraulic pump 15.

[0041] refer to Figure 1 and Figure 7 As shown, multiple soil columns 19 are placed directly below the circular pressure plate 13. The diameter of the circular pressure plate 13 is the same as the inner diameter of the multiple soil columns 19. The multiple soil columns 19 are coaxially installed and connected by flanges and fastened by mounting bolts 18. Each soil column 19 has a scale line 17 on its body. The soil column 19 is placed on the base plate 20, and a soil sample to be measured is placed in the soil column 19. The circular pressure plate 13 presses down on the soil sample to complete the preparation of the soil column.

[0042] refer to Figure 1 and Figure 7 As shown, a long strip-shaped fixing frame 7 is vertically fixed to the bottom of the circular steel plate 6. A digital displacement meter 8 is installed on the side of the fixing frame 7 near the top rod 11. A display 10 is installed on the rod body of the screw rod. The display 10 and the digital displacement meter 8 are electrically connected through a transmission line 9. The end of the pull rod of the digital displacement meter 8 is fixedly connected to the rod body of the telescopic rod 12 of the top rod 11 through a metal connecting piece. When the telescopic rod 12 extends, it can pull the end of the pull rod of the digital displacement meter 8 through the metal connecting piece, thereby reflecting the extension length of the telescopic rod 12 to the digital displacement meter 8. The distance that the telescopic rod 12 of the top rod 11 presses down on the circular pressure plate 13 can be measured and displayed by the digital displacement meter 8 and the result is displayed on the display 10.

[0043] Example 5

[0044] See attached document Figure 1 As shown, a pair of threaded uprights 1 are vertically welded on the base plate 20. A truss beam 4 is fixed to the pair of threaded uprights 1 by two pairs of fixing nuts 2. The pair of fixing nuts 2 are threaded to the threaded uprights 1 to clamp the two ends of the truss beam 4 together and fix it. The height of the truss beam 4 on the threaded uprights can be adjusted by adjusting the position of the two pairs of fixing nuts 2. A threaded hole is opened in the middle of the truss beam 4, and a screw rod 3 is threaded through it. A crossbar passes through the body of the screw rod 3 and is fastened to the screw rod. The torque is increased by the crossbar, which makes it easier to rotate the screw rod 3.

[0045] The bottom end of the screw 3 is fixedly connected to the support bearing 5. The circumference of the bottom end of the screw 3 is fixed to the inner wall of the inner ring of the support bearing 5, and the bottom end of the screw 3 does not extend out of the inner ring of the support bearing 5. A circular steel plate 6 is fixedly connected to the bottom of the support bearing 5, and a push rod 11 is fixedly connected to the bottom of the circular steel plate 6, so that the up and down adjustment of the screw 3 can be converted into the adjustment of the height of the push rod 11. A circular pressure plate 13 is fixedly connected to the bottom end of the telescopic rod 12 of the push rod 11. The side of the push rod 11 is connected to the hydraulic pump 15 through the oil pipe 14. The push rod 11 can be adjusted by starting the hydraulic pump 15. A long strip-shaped fixing frame 7 is also vertically fixed to the bottom of the circular steel plate 6. A digital displacement meter 8 is installed on one side of the top rod 11, and a display 10 is installed on the rod body of the screw rod. The display 10 and the digital displacement meter 8 are electrically connected through a transmission line 9. The end of the pull rod of the digital displacement meter 8 is fixedly connected to the rod body of the telescopic rod 12 of the top rod 11 through a metal connecting piece. When the telescopic rod 12 extends, it can pull the end of the pull rod of the digital displacement meter 8 synchronously through the metal connecting piece, thereby reflecting the extension length of the telescopic rod 12 to the digital displacement meter 8. The distance that the telescopic rod 12 of the top rod 11 presses down on the circular pressure plate 13 can be measured and displayed by the digital displacement meter 8 and the result can be displayed on the display 10.

[0046] Multiple soil columns 19 are placed directly below the circular pressure plate 13. The diameter of the circular pressure plate 13 is the same as the inner diameter of the multiple soil columns 19. The multiple soil columns 19 are coaxially installed and connected by flanges and fastened by mounting bolts 18. Each soil column 19 has a scale line 17 on its body. The soil column 19 is placed on the base plate 20. A soil sample to be measured is placed in the soil column 19. The circular pressure plate 13 presses down on the soil sample to complete the preparation of the soil column.

[0047] Example 6

[0048] Compared to the above embodiments, in this embodiment, the digital displacement gauge 8 can be replaced by other types of displacement gauges, the jack can be replaced by other types of jacks, and the material of the soil column cylinder 19 is plexiglass, so that the height of the soil column inside the soil column cylinder 19 can be observed by comparing the scale lines 17 set on the outer wall of the cylinder.

[0049] The working principle of this utility model is as follows: The base plate 20 of the device is placed on a solid and flat surface, as shown in the figure. Figure 8As shown, the first soil column 19 is placed on the base plate 20 and directly below the circular pressure plate 13. By adjusting the height of the screw 3 and the truss beam 4, the position of the circular pressure plate 13 is positioned at the opening of the soil column 19. The digital displacement gauge 8 is turned on, and then the pre-weighed soil is poured into and spread evenly into the soil column 19. Subsequently, the hydraulic pump 15 transmits hydraulic power through the oil pipe 14, causing the telescopic rod 12 of the top rod 11 to press down. On the one hand, the scale line 17 on the soil column 19 records the scale of the pressing position of the circular pressure plate 13, and on the other hand, the digital displacement gauge 8 records the downward displacement of the telescopic rod 12 and the data is viewed on the display 10. During the compaction process, the compaction thickness of the soil is precisely controlled with the help of the digital displacement gauge 8, thereby ensuring that the soil column sample reaches the specified compaction degree.

[0050] refer to Figure 9 As shown, after the soil in the first soil column 19 is compacted, the circular pressure plate 13 is raised by adjusting the height of the truss beam 4 and the screw 3, and the second soil column 19 is coaxially installed on the first soil column 19. The flanges at the two joints are fixed with the mounting bolts 18. Then, the soil in the second soil column 19 is compacted in the same way as the soil in the first soil column 19.

[0051] refer to Figure 10 As shown, after the soil in the second soil cylinder is compacted, the soil in the subsequent soil column cylinder 19 is compacted using the same method. This continues until a single compacted soil column of the required height is formed for use in subsequent related tests.

Claims

1. A device for preparing compacted soil columns, characterized in that, Includes a base plate (20), on which a pair of threaded uprights (1) are vertically connected. A truss beam (4) is fitted on the pair of threaded uprights (1). The truss beam (4) is fixed to the pair of threaded uprights (1) by two pairs of fixing nuts (2). A threaded hole is opened in the middle of the truss beam (4) and threadedly connected to a screw rod (3). A support bearing (5) is fixed at the bottom end of the screw rod (3). A circular steel plate (6) is fixed to the bottom surface of the support bearing (5). A top rod (11) is fixed to the bottom surface of the circular steel plate (6). A fixing frame (7) is also vertically fixed to the bottom of the circular steel plate (6). A digital displacement gauge (8) is installed on the side of the fixing frame (7) near the top rod (11). A circular pressure plate (13) is fixed to the end of the telescopic rod (12) of the top rod (11). A soil column cylinder (19) is placed on the base plate (20) directly below the circular pressure plate (13).

2. The compacted soil column preparation device according to claim 1, characterized in that, A display (10) is installed on the body of the threaded upright (1). The display (10) is electrically connected to the digital displacement meter (8) via a transmission line (9). The end of the pull rod of the digital displacement meter (8) is fixedly connected to the body of the telescopic rod (12) via a metal connecting piece.

3. The compacted soil column preparation device according to claim 1, characterized in that, The push rod (11) is a jack, and the push rod (11) is connected to the hydraulic pump (15) through the oil pipe (14).

4. The compacted soil column preparation device according to claim 1, characterized in that, The diameter of the circular pressure plate (13) is the same as the inner diameter of the soil column (19).

5. The compacted soil column preparation device according to claim 4, characterized in that, The earthen column (19) has scale lines on its body.

6. The compacted soil column preparation device according to claim 4, characterized in that, The soil column (19) can be used in multiple coaxial installations, and the multiple soil column (19) are connected to each other by flanges and fastened with mounting bolts (18).

7. The compacted soil column preparation device according to claim 1, characterized in that, A crossbar runs through the shaft of the screw (3), and the crossbar is fastened to the screw (3).

8. The compacted soil column preparation device according to claim 1, characterized in that, The bottom end of the screw (3) is fixed to the inner wall of the inner ring of the support bearing (5).

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