Soil Compaction Detection Device

Abstract

This application relates to the field of building construction, and particularly to a soil compaction detection device, which includes a main body and a compaction component for compacting soil samples. The main body includes a base for fixing a compaction cylinder. The compaction component is located above the base, and a frame is provided between the compaction component and the base. The compaction component is connected to the base through the frame. The compaction component includes a plurality of vibration components and a downward pressing component for pushing the vibration components to move downward. The plurality of vibration components are arranged along the circumferential direction of the compaction cylinder, and the plurality of vibration components move downward in sequence along the vertical direction through the downward pressing component. This application has the effects of reducing the loosening of the soil sample due to vibration during the movement of the compaction cylinder, improving the compaction effect of the soil sample, and improving the accuracy of detection.

Description

Technical Field

[0001] The present application relates to the field of construction, and in particular to a soil compaction detection device. Background Art

[0002] The compaction test is a method of compacting soil samples with a hammer to understand the compaction characteristics of the soil. This method uses different compaction energies (hammer weight × drop height × number of hammer blows) to hammer soil samples with different water contents respectively, and measures the corresponding values, so as to obtain the maximum dry unit weight (generally referring to the bulk or dense density of aggregates) and the optimum water content, providing a basis for the design and construction of fill projects.

[0003] At present, during the experiment of the soil compaction device, generally a manual compactor or an electric-driven compaction device is used to compact the soil sample. The manual compactor needs to hold the compactor at different positions of the compaction cylinder for compaction, and the electric-driven compaction device needs to move the compaction cylinder filled with the soil sample, so as to achieve the effect of uniform compaction.

[0004] Regarding the above related technologies, the inventor believes that certain vibrations are likely to occur during the movement of the compaction cylinder, which easily causes the already compacted soil sample to loosen due to vibration, affecting the compaction effect of the overall soil sample and the accuracy of the detection. Summary of the Invention

[0005] In order to reduce the loosening of the soil sample due to vibration during the movement of the compaction cylinder, improve the compaction effect of the soil sample, and improve the accuracy of the detection, the present application provides a soil compaction detection device.

[0006] The soil compaction detection device provided by the present application adopts the following technical solutions:

[0007] The soil compaction detection device includes a main body and a compaction component for compacting the soil sample. The main body includes a base for fixing the compaction cylinder. The compaction component is located above the base. A frame is provided between the compaction component and the base. The compaction component is connected to the base through the frame. The compaction component includes a plurality of vibration components and a downward pressing component for pushing the vibration components to move downward. The plurality of vibration components are arranged along the circumferential direction of the compaction cylinder, and the plurality of vibration components move downward in sequence along the vertical direction through the downward pressing component.

[0008] By adopting the above technical solutions, the compaction component that moves up and down can compact the soil sample in the compaction cylinder according to the force required by the actual test, so as to achieve the test purpose. At the same time, the use of a plurality of vibration components can compact the soil samples at multiple locations inside the compaction cylinder, effectively reducing the movement of the compaction cylinder during the experiment, reducing the loosening of the soil sample due to vibration during the movement of the compaction cylinder, improving the compaction effect of the soil sample, and improving the accuracy of the detection.

[0009] Optionally, the vibrating component includes a horizontally arranged pressing plate and a vertically arranged pressing rod. The pressing plate is fan-shaped, and a plurality of the pressing plates can form a circular plate matching the inner diameter of the compaction cylinder. An outer casing slidably connected to the frame is arranged outside the pressing rod, and the top end of the pressing rod is located inside the outer casing and is slidably connected to the outer casing.

[0010] By adopting the above technical solution, by using a plurality of fan-shaped pressing plates, the shape of the compaction cylinder can be effectively adapted, so as to increase the positions where the soil sample is impacted. The pressing plates form a circular plate matching the inner diameter of the compaction cylinder, making the force on the soil sample more uniform and the compaction effect of each part of the soil sample in the compaction cylinder more uniform.

[0011] Optionally, the pressing plate includes a fan-shaped base plate and a plurality of fan-shaped ring-shaped extension plates. The extension plates have the same fan-shaped radian as the base plate, and the diameters of the plurality of extension plates increase in the direction away from the base plate. At least one threaded connecting piece is arranged between the plurality of extension plates and the base plate, and the base plate and the plurality of extension plates are connected together through the threaded connecting piece.

[0012] By adopting the above technical solution, the pressing plate composed of the base plate and a plurality of extension plates can change the diameter of the pressing plate by increasing or decreasing the number of extension plates, and then adopt pressing plates with different diameters according to the size of the compaction cylinder used in the experiment, so as to improve the adaptability between the pressing plate and the compaction cylinder, and thus improve the compaction effect of the soil sample.

[0013] Optionally, arc-shaped connecting parts are arranged on the outer convex surfaces of the base plate and the extension plates, and connecting grooves matching the connecting parts are arranged on the inner concave surfaces of the extension plates. Two adjacent extension plates are inserted together through the connecting parts and the connecting grooves.

[0014] By adopting the above technical solution, the base plate and the extension plates are inserted together through the connecting grooves and the connecting parts, increasing the connection strength in the vertical direction between the base plate and the adjacent extension plates and between two extension plates, so that during the downward pressing process of the pressing plate, the impact resistance of the pressing plate is enhanced and the strength of the pressing plate is improved.

[0015] Optionally, the pressing rod includes a telescopic sleeve and an inner rod. The sleeve is slidably connected to the outer casing, the top end of the inner rod is located in the inner hole of the sleeve and is slidably connected to the sleeve, and a first elastic member for pushing the inner rod to move downward is arranged between the sleeve and the inner rod.

[0016] By adopting the above technical solution, the telescopic pressure rod reduces the impact force of the soil sample on the pressure rod when the pressure plate contacts the soil sample. At the same time, the first elastic member can effectively buffer the impact force of the soil sample on the pressure rod, and also enable the shortened pressure rod to effectively rebound.

[0017] Optionally, the lower pressing assembly includes a driving disk for pushing the pressure rod to move and a first driving member for driving the pressure plate to rotate along a vertical axis. A protrusion for pushing the pressure rod downward is provided on the end face of the driving disk facing the pressure rod. The protrusion rotates with the driving disk and sequentially pushes the pressure rod to move. A second elastic member for pushing the pressure rod upward is further provided between the pressure rod and the machine housing.

[0018] By adopting the above technical solution, the rotation of the driving disk drives the protrusion to push, making the driving mode of the driving disk more convenient. At the same time, the rotation of the protrusion is used to push the pressure rod, which can effectively press the pressure rods at various positions in sequence, reducing the situation where the pressure on the soil sample decreases due to the simultaneous downward pressing of multiple pressure plates, and making it more convenient to compact the soil sample.

[0019] Optionally, a fixing assembly for fixing the compaction cylinder is provided on the base. The fixing assembly includes a plurality of fixing members, and the plurality of fixing members are arranged at intervals along the circumferential direction of the compaction cylinder. A plurality of sliding grooves are formed on the top end face of the base, and the length direction of the sliding grooves is arranged along the radial direction of the compaction cylinder. The fixing members move along the length direction of the sliding grooves through the sliding grooves.

[0020] By adopting the above technical solution, by sliding a plurality of slidably connected fixing assemblies, when using compaction cylinders of different specifications, it can be adjusted according to the diameter of the compaction cylinder, thereby increasing the adaptability of the fixing assembly and making the experimental preparation more convenient.

[0021] Optionally, the fixing member includes a vertically arranged fixing screw and a fixing nut. The fixing nut is threadedly connected to the outside of the fixing screw, and the fixing nut rotates and approaches and presses against the bottom of the compaction cylinder, thereby fixing the relative position of the compaction cylinder and the base.

[0022] By adopting the above technical solution, the fixing method using the fixing screw and the fixing nut makes the fixing operation of the compaction cylinder simpler and more convenient. At the same time, the threadedly connected fixing screw and fixing nut are more stable during fixing, and the loosening situation during the compaction of the soil sample can be reduced.

[0023] Optionally, a linkage assembly for simultaneously driving the movement of a plurality of the fixing screws is disposed inside the base. The plurality of fixing screws move simultaneously through the linkage assembly. The linkage assembly includes a linkage disk rotatably disposed inside the base. A plurality of driving holes are formed in the linkage disk. The plurality of driving holes are arranged along the circumferential direction of the linkage disk. The driving holes are inclined with respect to the radial direction of the linkage disk. The fixing nuts penetrate through the driving holes and the sliding grooves simultaneously.

[0024] By adopting the above technical solution, the use of the linkage disk enables a plurality of fixing members to move simultaneously, reducing the situation of moving the fixing members multiple times during the fixing process of the compaction cylinder and improving the fixing efficiency of the compaction cylinder.

[0025] Optionally, a driving lead screw for driving the housing to move in the vertical direction and a second driving member for driving the driving lead screw to rotate are disposed on one side of the compaction assembly facing the base. The driving lead screw is in threaded connection with the compaction assembly.

[0026] By adopting the above technical solution, the use of the driving lead screw and the second driving member can drive the entire compaction assembly to move, facilitating the addition of soil samples into the compaction cylinder and the process of taking out the soil samples in the compaction cylinder.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The use of the vertically movable compaction assembly can compact the soil sample in the compaction cylinder according to the force required for actual test needs, thereby achieving the experimental purpose. At the same time, the use of a plurality of vibration components can compact the soil samples at multiple locations inside the compaction cylinder, effectively reducing the movement of the compaction cylinder during the experiment, reducing the vibration loosening of the soil sample during the movement of the compaction cylinder, improving the compaction effect of the soil sample, and improving the accuracy of detection;

[0029] 2. The use of the pressure plate composed of the base plate and a plurality of extension plates can change the diameter of the pressure plate by increasing or decreasing the number of extension plates, and then adopt a pressure plate with a different diameter according to the size of the compaction cylinder used in the experiment, thereby improving the adaptability between the pressure plate and the compaction cylinder and improving the compaction effect of the soil sample;

[0030] 3. The use of the linkage disk enables a plurality of fixing members to move simultaneously, reducing the situation of moving the fixing members multiple times during the fixing process of the compaction cylinder and improving the fixing efficiency of the compaction cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the soil compaction detection device of the present application.

[0032] Figure 2 is a partial cross-sectional view of the compaction assembly in an embodiment of the present application.

[0033] Figure 3 It is an exploded view of the pressure plate in the embodiment of the present application.

[0034] Figure 4 It is a partial sectional view of the pressure rod in the embodiment of the present application.

[0035] Figure 5 It is a schematic structural diagram of the fixing component in the embodiment of the present application.

[0036] Figure 6 It is a partial sectional view of the base in the embodiment of the present application.

[0037] Explanation of reference numerals: 1, body; 11, base; 111, sliding groove; 12, frame; 13, driving lead screw; 14, main driving motor; 15, compaction cylinder; 2, compaction component; 21, vibrating component; 211, pressure plate; 2111, base plate; 21111, first connecting groove; 2112, extension plate; 21121, second connecting groove; 21122, connecting part; 2113, fixing bolt; 212, pressure rod; 2121, sleeve; 2122, inner rod; 2123, first elastic member; 213, push plate; 214, second elastic member; 22, outer shell; 23, lower pressing component; 231, driving disk; 2311, protrusion; 232, secondary driving motor; 3, fixing component; 31, fixing member; 311, fixing screw; 312, fixing nut; 32, linkage component; 321, linkage disk; 3211, driving hole; 322, handle. Detailed implementation manners

[0038] The following will Figure 1-6 make a further detailed description of the present application in conjunction with the attached

[0039] The embodiment of the present application discloses a soil compaction detection device. Referring to Figure 1 , the soil compaction detection device includes a body 1 and a compaction component 2 for compacting soil samples. The body 1 includes a base 11 for fixing the compaction cylinder 15, and a frame 12 is fixedly connected to the top end surface of the base 11. The frame 12 is located on one side of the top surface of the base 11. The compaction component 2 is located above the base 11. A vertically arranged driving lead screw 13 is rotatably connected to the side wall of the frame 12, and a main driving motor 14 for driving the driving lead screw 13 to rotate is fixedly installed on the top end surface of the frame 12. The compaction component 2 is threadedly connected to the driving lead screw 13, so that the compaction component 2 moves up and down in the vertical direction through the driving lead screw 13.

[0040] Refer to Figure 2, the compaction component 2 includes a plurality of vibrating components 21 for compaction and a housing 22 for mounting the vibrating components 21. The vibrating components 21 are arranged vertically and are spaced circumferentially along the circumference of the compaction cylinder 15. The top end of the vibrating component 21 is located inside the housing 22, and the bottom end of the vibrating component 21 penetrates the bottom side wall of the housing 22 and is slidably connected to the housing 22. The bottom end of the vibrating component 21 extends out of the bottom end face of the housing 22 to the outside of the housing 22, so that the vibrating component 21 can be moved vertically into the compaction cylinder 15 through the driving lead screw 13. A downward pressing component 23 for pushing the vibrating component 21 downward is further provided at the top end of the housing 22. The plurality of vibrating components 21 move sequentially in the vertically downward direction through the downward pressing component 23 and compact the soil sample in the compaction cylinder 15.

[0041] Reference Figure 3 , the vibrating component 21 includes a pressing plate 211 for pressing the soil sample and a vertically arranged pressing rod 212. The pressing plate 211 is horizontally arranged at the bottom end of the pressing rod 212 and is fixedly connected to the pressing rod 212, so that the pressing plate 211 is slidably connected to the housing 22 through the pressing rod 212. The horizontal cross-section of the pressing plate 211 is fan-shaped. When the pressing plates 211 in the plurality of vibrating components 21 are at the same height position, the plurality of pressing plates 211 can form a circular plate with the same inner diameter as the compaction cylinder 15.

[0042] Reference Figure 2 , Figure 3 , the pressing plate 211 includes a fan-shaped base plate 2111 and a plurality of fan-shaped ring-shaped extension plates 2112. The top end face of the base plate 2111 is fixedly connected to the bottom end of the pressing rod 212. The plurality of extension plates 2112 are arranged side by side away from the center of the base plate 2111. The circumferential radian of the extension plate 2112 is the same as that of the base plate 2111. The inner diameter and outer diameter of the extension plate 2112 increase from the base plate 2111 in the direction away from the base plate 2111, and the difference between the outer diameter and inner diameter of each extension plate 2112 is the same.

[0043] Reference Figure 3, a first connection groove 21111 is provided on the circumferential surface of the base plate 2111, and the length direction of the first connection groove 21111 is arranged along the radian of the circumferential surface of the base plate 2111. A second connection groove 21121 is provided on the convex surface of each extension plate 2112, and the length direction of the second connection groove 21121 is arranged along the bending direction of the extension plate 2112. A convex connection portion 21122 is integrally formed on the concave surface of the extension plate 2112, and the length direction of the connection portion 21122 is arranged along the bending direction of the extension plate 2112. Between two adjacent extension plates 2112, the connection portion 21122 of the extension plate 2112 with a larger diameter can extend into the connection groove of the extension plate 2112 with a smaller diameter, so as to plug the two extension plates 2112 together. The connection portion 21122 on the extension plate 2112 with the smallest diameter can extend into the connection groove on the circumferential surface of the base plate 2111, so as to plug the extension plate 2112 with the smallest diameter and the base plate 2111 together.

[0044] A plurality of fixing bolts 2113 are also inserted between the plurality of extension plates 2112 and the base plate 2111. The number of the fixing bolts 2113 is at least two. The fixing bolts 2113 sequentially penetrate through the plurality of extension plates 2112 from the outermost extension plate 2112 and are threadedly connected with the base plate 2111, so as to fixedly connect the plurality of extension plates 2112 and the base plate 2111 together.

[0045] Reference Figure 4 , the pressing rod 212 includes a sleeve 2121 and an inner rod 2122 that are slidably connected together. The top end of the sleeve 2121 is fixedly connected with the pressing plate 211, and the bottom end of the sleeve 2121 extends vertically downward and is slidably connected with the outer shell 22. The bottom end of the inner rod 2122 is fixedly connected with the base plate 2111, and the top end of the inner rod 2122 extends into the inner hole of the sleeve 2121 from the top end of the sleeve 2121 and is slidably connected with the sleeve 2121. A first elastic member 2123 is fixedly connected in the inner hole of the sleeve 2121, and the first elastic member 2123 is a compression spring. The top end of the first elastic member 2123 is fixedly connected with the inner side of the side wall of the sleeve 2121, and the bottom end of the first elastic member 2123 is fixedly connected with the top end face of the inner rod 2122, so as to buffer the reaction force of the soil sample on the pressing plate 211 during the downward movement of the pressing rod 212.

[0046] When the pressing plate 211 is separated from the surface of the soil sample, the first elastic member 2123 is in a free state. When the bottom end face of the pressing plate 211 contacts the top end face of the soil sample, the soil sample pushes the pressing plate 211, so that the pressing plate 211 pushes the inner rod 2122 to move vertically upward along the axis of the inner rod 2122, and the first elastic member 2123 is converted into a compressed state.

[0047] Reference Figure 2, the pressing component 23 includes a horizontally arranged driving disk 231 and a secondary driving motor 232 for driving the driving disk 231 to rotate. The driving disk 231 is located inside the housing 22 and faces the top end faces of a plurality of pressing rods 212. The secondary driving motor 232 is located outside the housing 22. The housing of the secondary driving motor 232 is fixedly connected to the top end face of the housing 22. The output end of the secondary driving motor 232 vertically penetrates the top side wall of the housing 22 and is fixedly connected to the top end face of the driving disk 231.

[0048] On the end face of the driving disk 231 facing the sleeve, a protrusion 2311 for pushing the pressing rod 212 to move vertically downward is integrally formed. The protrusion 2311 is arc-shaped, and both ends of the bending direction of the protrusion 2311 are smoothly transitioned with the bottom end face of the driving disk 231. A horizontally arranged push plate 213 is fixedly connected to the top end face of the sleeve. A second elastic member 214 for pushing the pressing rod 212 to move upward is fixedly connected between the push plate 213 and the housing 22. The second elastic member 214 is a compression spring.

[0049] When the secondary driving motor 232 is started, the secondary driving motor 232 drives the driving disk 231 to rotate. During the rotation of the driving disk 231, the protrusion 2311 is driven to rotate synchronously. When the protrusion 2311 rotates to face the push plate 213, the surface of the protrusion 2311 squeezes the push plate 213, so that the push plate 213 moves downward, and then the push plate 213 pushes the pressing rod 212 and the pressing disk 211 to move downward, and compacts the soil sample in the compaction cylinder 15. The second elastic member 214 is in a compressed state; when the protrusion 2311 rotates to be offset from the push plate 213, the push plate 213 moves upward under the elastic force of the second elastic member 214, so as to drive the pressing rod 212 and the pressing disk 211 to move upward, so that the pressing disk 211 is separated from the surface of the soil sample, and the second elastic member 214 is in a free state.

[0050] A fixing component 3 for fixing the compaction cylinder 15 is arranged on the base 11. The fixing component 3 includes a plurality of fixing members 31, and the plurality of fixing members 31 are arranged along the circumferential direction of the compaction cylinder 15. A plurality of sliding grooves 111 are formed on the base 11. The number of the sliding grooves 111 is the same as that of the fixing members 31 and they are in one-to-one correspondence. The sliding grooves 111 are strip-shaped, and the length direction of the sliding grooves 111 is arranged along the radial direction of the compaction cylinder 15. The fixing members 31 are slidably connected to the base 11 through the sliding grooves 111 and move in the direction close to or away from the compaction cylinder 15 through the sliding grooves 111. A linkage component 32 for driving the fixing members 31 to move is rotatably connected inside the base 11, and the plurality of fixing members 31 move simultaneously through the linkage component 32.

[0051] Reference Figure 5 、 Figure 6, the fixing member 31 includes a vertically arranged fixing screw 311 and a fixing nut 312 for pressing and fixing the compaction cylinder 15. A slider is fixedly connected to the bottom end of the fixing screw 311, and the fixing nut 312 slides inside the chute 111 through the slider. The top end of the fixing screw 311 extends out of the top side wall of the base 11 to the outside of the base 11. The fixing nut 312 is sleeved outside the fixing screw 311 and is threadedly connected to the fixing screw 311. When the fixing nut 312 rotates and approaches the base 11 along the axis of the fixing screw 311, the fixing nut 312 presses the edge at the bottom of the compaction cylinder 15, thereby pressing and fixing the bottom end of the compaction cylinder 15 together with the base 11.

[0052] Reference Figure 6 , the linkage assembly 32 includes a horizontally arranged linkage disk 321 and a handle 322 for driving the linkage disk 321 to rotate. One end in the length direction of the handle 322 is fixedly connected to the side wall of the linkage disk 321, and the other end of the handle 322 extends out of the side wall of the base 11 to the outside of the base 11, so as to facilitate the rotation of the linkage disk 321.

[0053] Reference Figure 6 , a plurality of driving holes 3211 are formed on the disk surface of the linkage disk 321, and the plurality of driving holes 3211 are arranged at intervals along the circumferential direction of the linkage disk 321. The driving holes 3211 are strip-shaped, and the length direction of the driving holes 3211 is arranged at an angle with the length direction of the chute 111. The fixing screw 311 passes through the driving holes 3211, and the side wall of the fixing screw 311 abuts against the side wall of the driving holes 3211. When the linkage disk 321 rotates, the side wall of the driving holes 3211 presses the side wall of the fixing screw 311, thereby pushing the fixing screw 311 to move. At the same time, under the action of the chute 111, the fixing screw 311 moves along the length direction of the chute 111.

[0054] The implementation principle of the soil compaction detection device in the embodiment of the present application is as follows: During the process of the soil compaction experiment, first place the compaction cylinder 15 filled with soil samples on the tabletop of the base 11, and then rotate the handle 322 to make the linkage disk 321 rotate and drive a plurality of fixing members 31 to move towards the compaction cylinder 15 until the fixing members 31 move to appropriate positions. Rotate the fixing nut 312 to press and fix the compaction cylinder 15 on the tabletop of the base 11 by using the fixing nut 312. Then start the main drive motor 14 to make the main drive motor 14 drive the compaction assembly 2 to move towards the inside of the compaction cylinder 15. Then turn on the secondary drive motor 232, and the secondary motor drives the pressing disk 211 to rotate, so that the pressing disk 211 uses the bumps to push the compaction disks downward one by one and compact the soil samples during the rotation process. Then use the main drive motor 14 to drive the compaction assembly 2 to move upward, and repeat the above steps to complete the compaction of the soil samples.

[0055] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. Soil compaction detection device, characterized in that: It includes a main body (1) and a compaction component (2) for compacting soil samples. The main body (1) includes a base (11) for fixing a compaction cylinder (15). The compaction component (2) is located above the base (11). A frame (12) is provided between the compaction component (2) and the base (11). The compaction component (2) is connected to the base (11) through the frame (12). The compaction component (2) includes a plurality of vibrating components (21) and a downward pressing component (23) for pushing the vibrating components (21) to move downward. The plurality of vibrating components (21) are arranged along the circumferential direction of the compaction cylinder (15). The plurality of vibrating components (21) move downward in sequence along the vertical direction through the downward pressing component (23). The vibrating component (21) includes a horizontally arranged pressing plate (211) and a vertically arranged pressing rod (212). The pressing plate (211) is fan-shaped. A plurality of the pressing plates (211) can form a circular plate matching the inner diameter of the compaction cylinder (15). A casing slidably connected to the frame (12) is arranged outside the pressing rod (212). The top end of the pressing rod (212) is located inside the casing and is slidably connected to the casing. The pressing rod (212) includes a telescopic sleeve (2121) and an inner rod (2122). The sleeve (2121) is slidably connected to the casing. The top end of the inner rod (2122) is located in the inner hole of the sleeve (2121) and is slidably connected to the sleeve (2121). A first elastic member (2123) for pushing the inner rod (2122) to move downward is arranged between the sleeve (2121) and the inner rod (2122). The downward pressing component (23) includes a driving disk (231) for pushing the pressing rod (212) to move and a first driving member for driving the pressing plate (211) to rotate along a vertical axis. A protrusion (2311) for pushing the pressing rod (212) to move downward is arranged on the end face of the driving disk (231) facing the pressing rod (212). The protrusion (2311) rotates with the driving disk (231) and sequentially pushes the pressing rod (212) to move. A second elastic member (214) for pushing the pressing rod (212) to move upward is also arranged between the pressing rod (212) and the casing.

2. The soil compaction detection device according to claim 1, wherein: The pressing plate (211) includes a fan-shaped base plate (2111) and a plurality of fan-shaped ring-shaped extension plates (2112). The extension plates (2112) have the same fan-shaped radian as the base plate (2111). The diameters of the plurality of extension plates (2112) increase in the direction away from the base plate (2111). At least one threaded connecting member is arranged between the plurality of extension plates (2112) and the base plate (2111). The base plate (2111) and the plurality of extension plates (2112) are connected together through the threaded connecting member.

3. The soil compaction detection device according to claim 2, wherein: An arc-shaped connecting portion (21122) is provided on the outer convex surfaces of the base plate (2111) and the extension plate (2112). A connecting groove matching the connecting portion (21122) is provided on the inner concave surface of the extension plate (2112). Two adjacent extension plates (2112) are plugged together through the connecting portion (21122) and the connecting groove.

4. The soil compaction detection device according to claim 1, characterized in that: A fixing assembly (3) for fixing the compaction cylinder (15) is provided on the base (11). The fixing assembly (3) includes a plurality of fixing members (31). The plurality of fixing members (31) are arranged at intervals along the circumference of the compaction cylinder (15). A plurality of sliding grooves (111) are formed on the top end surface of the base (11). The length direction of the sliding grooves (111) is arranged along the radial direction of the compaction cylinder (15). The fixing members (31) move along the length direction of the sliding grooves (111) through the sliding grooves (111).

5. The soil compaction detection device according to claim 4, characterized in that: The fixing member (31) includes a vertically arranged fixing screw (311) and a fixing nut (312). The fixing nut (312) is threadedly connected to the outside of the fixing screw (311). The fixing nut (312) rotates and approaches and presses the bottom of the compaction cylinder (15), thereby fixing the relative positions of the compaction cylinder (15) and the base (11).

6. The soil compaction detection device according to claim 5, wherein: A linkage assembly (32) for simultaneously driving the plurality of fixing screws (311) to move is arranged inside the base (11). The plurality of fixing screws (311) move simultaneously through the linkage assembly (32). The linkage assembly (32) includes a linkage disk (321) rotatably arranged inside the base (11). A plurality of driving holes (3211) are provided on the linkage disk (321). The plurality of driving holes (3211) are arranged along the circumference of the linkage disk (321). The driving holes (3211) are inclined with respect to the radial direction of the linkage disk (321). The fixing nuts (312) penetrate through the driving holes (3211) and the sliding grooves (111) simultaneously.

7. The soil compaction detection device according to claim 1, characterized in that: On one side of the compaction assembly (2) facing the base (11), a driving lead screw (13) for driving the outer shell (22) to move in the vertical direction and a second driving member for driving the driving lead screw (13) to rotate are provided. The driving lead screw (13) is threadedly connected to the compaction assembly (2).

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