A highway subgrade filler testing device and method

Abstract

This invention discloses a test device and method for highway subgrade filler. The invention relates to the field of highway subgrade filler testing technology, and includes a workbench. A translation component is located at the top of one end of the workbench, and a rotation component is located at the top of the translation component. A semi-gear rack and pinion circulating drop component and a cleaning component are located at the top of the workbench. A compaction component is located at the bottom of the semi-gear rack and pinion circulating drop component. A compaction sleeve assembly is located at the top of the rotation component. The top sidewall of the compaction sleeve assembly is connected to the rotation component via a positioning component. Multiple limiting bosses are arranged in a circumferential array at the top of the compaction sleeve assembly. By incorporating the cleaning component, this invention prevents the nut from loosening due to vibration generated during the compaction component's hammering of the filler, ultimately preventing the small compaction sleeve from slipping off the threaded rod of the positioning component.

Description

Technical Field

[0001] This invention relates to the field of highway subgrade fill material testing technology, and in particular to a highway subgrade fill material testing device and method. Background Technology

[0002] Before subgrade construction, standard compaction tests must be conducted on the subgrade fill material. A compaction test is a method of understanding the compaction characteristics of soil by compacting a soil sample with a hammer. This method involves hammering soil samples with different moisture contents using different compaction efforts (hammer weight × drop height × number of blows) and measuring the corresponding dry density to determine the maximum dry density (generally referring to aggregate bulk density) and optimum moisture content, providing a basis for the design and construction of fill projects. Compaction tests can be divided into light compaction tests and heavy compaction tests.

[0003] During the hammering process, the vibration generated by the hammering can easily loosen the nuts that tighten the small compaction cylinder, causing the small compaction cylinder to loosen. In addition, after each layer of soil sample is hammered, it is necessary to manually roughen the surface. Furthermore, the hammer head tends to stick to soil after each hammering, affecting the flatness of the surface after hammering. Also, during the hammering process, the soil around the side walls of the large and small compaction cylinders will be higher than the soil in the center after hammering, resulting in a portion of soil protruding from the side walls of the large and small compaction cylinders. This leads to uneven soil thickness after each layer of hammering.

[0004] Therefore, it is necessary to invent a test device and method for highway subgrade filler to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a test device and method for highway subgrade fill material, so as to solve the problems of loosening of the compaction cylinder during the hammering process, requiring manual roughening, the hammer head sticking to the soil affecting the flatness after hammering, and uneven soil thickness after each layer of hammering.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a highway subgrade filler testing device, comprising a workbench, a translation component at the top of one end of the workbench, a rotation component at the top of the translation component, a half-gear rack and pinion circulating drop component and a cleaning component at the top of the workbench, a compaction component at the bottom of the half-gear rack and pinion circulating drop component, a compaction sleeve assembly at the top of the rotation component, the top sidewall of the compaction sleeve assembly being connected to the rotation component via a positioning component, and a plurality of limiting protrusions arranged in a circumferential array at the top of the compaction sleeve assembly;

[0007] The cleaning assembly includes symmetrically arranged guide rail pairs, each with a stepper motor at its bottom. Each stepper motor has a pneumatic telescopic rod at its bottom, and each pneumatic telescopic rod has a fixed rotating column at its bottom. Support plates are rotatably connected to the side walls of each rotating column. An image acquisition and processing module is located at the bottom of each support plate. The two support plates are connected on opposite sides via multi-stage electric telescopic rods. A U-shaped frame is located at the bottom of each rotating column, and a cleaning blade is connected between the inner walls of opposite sides of the U-shaped frame via an angle adjustment assembly.

[0008] As a preferred technical solution of the present invention, the angle adjustment component includes a round rod rotatably connected to the inner wall of the opposite side of the "U"-shaped frame. The round rod passes through the cleaning blade and is fixedly connected to the cleaning blade. The inner wall of the "U"-shaped frame that contacts the peripheral wall of the round rod is provided with a first guide groove parallel to the round rod. Each of the first guide grooves has a spiral guide groove at both ends that communicates with the first guide groove 902. The two spiral guide grooves rotate in opposite directions. The peripheral walls at both ends of the round rod are provided with guide blocks that cooperate with the first guide grooves. Electromagnets are provided at both ends of the round rod. A permanent magnet is provided on the inner wall of the "U"-shaped frame opposite to the electromagnet. A compression spring is provided between the electromagnet and the permanent magnet.

[0009] As a preferred embodiment of the present invention, the workbench is provided with support legs at the bottom and a controller is provided on one side of the workbench.

[0010] As a preferred technical solution of the present invention, the translation component includes a slide groove formed on the top of the worktable, a movable plate slidably connected to the top of the slide groove, a lead screw driven by a drive motor is provided in the movable plate, the lead screw passes through the worktable and the movable plate, one end of the lead screw is rotatably connected to the worktable, and the other end is threadedly connected to the movable plate, and the drive motor is fixedly connected to the worktable.

[0011] As a preferred embodiment of the present invention, the rotating assembly includes a rotating disk rotatably connected to the top of the movable plate and driven by a rotating motor. The top of the rotating disk is provided with a fixing ring fixedly connected by bolts. The top of the fixing ring is provided with a positioning groove, and the top of the positioning groove is provided with wax paper.

[0012] As a preferred technical solution of the present invention, the semi-gear rack and pinion circulating drop assembly includes a support box disposed at one end of the top of the workbench, a support frame provided on the top side wall of the support box, a semi-gear driven by a rotary motor disposed inside the support box, the semi-gear meshing with a rack, a guide plate disposed on the side of the support frame away from the support box, a through groove provided on the guide plate to cooperate with the rack, and a rack slidably connected to the inner arm of the guide plate.

[0013] As a preferred embodiment of the present invention, the compaction assembly includes a cylinder connected to a half-gear rack and pinion cyclic falling assembly, and a compaction hammer is fixedly connected to the bottom of the cylinder.

[0014] As a preferred embodiment of the present invention, the compaction sleeve assembly includes a large compaction sleeve disposed at the top of the positioning groove, a small compaction sleeve sleeved on the top of the large compaction sleeve, and a limiting boss disposed at the top of the small compaction sleeve.

[0015] As a preferred technical solution of the present invention, the positioning component includes "U"-shaped lugs arranged in a circumferential array on the top side wall of the small compaction cylinder and a threaded rod disposed on the top of the fixing ring, wherein the top of the threaded rod is provided with a nut for pressing the "U"-shaped lugs.

[0016] The present invention also provides a test method for highway subgrade fill material, the method comprising the following steps:

[0017] Step 1: Place wax paper inside the top of the rotating assembly, then place the compaction sleeve assembly on top of the rotating assembly, and then press the compaction sleeve assembly firmly on top of the rotating assembly using the positioning assembly. Finally, apply Vaseline to the inner wall of the compaction sleeve assembly.

[0018] Step 2: Pour the first batch of filler into the compaction sleeve assembly, and start the half-gear rack and pinion circulating drop assembly to make the compaction component at the bottom of the rack and pinion circulating drop assembly perform a free-falling motion.

[0019] Step 3: When the compaction component is in free fall, control the angle adjustment component and the cleaning component to make the cleaning blade rotate and push the limiting boss and the compaction sleeve assembly to rotate, so that the compaction sleeve assembly always abuts against the positioning component.

[0020] Step 4: After each hammering, control the rotating component to drive the compaction sleeve assembly to rotate, thereby compacting the filler at different positions within the compaction sleeve assembly. At the same time, as the compaction component rises, control the cleaning component to make the cleaning blade clean the bottom of the compaction hammer of the compaction component.

[0021] Step 5: After the first packing material is compacted, the cleaning blade is reset to a vertical position by controlling the angle adjustment component. Then, the cleaning component is controlled to allow the cleaning blade to enter the compaction sleeve assembly. The stepper motor is then controlled to rotate 45 degrees, and the multi-stage electric telescopic rod is extended until the cleaning blade contacts the inner wall of the compaction sleeve assembly. The pneumatic telescopic rod is then extended to push the cleaning blade into the packing material. The rotating component is then controlled to rotate and drive the compaction sleeve assembly to rotate. Under the action of the cleaning blade, the packing material adhering to the inner wall of the compaction sleeve assembly is scraped to the center position.

[0022] Step 6: Control the moving component to move the compaction sleeve assembly, so that the relative position of the cleaning knife and the compaction sleeve assembly changes. Then control the rotating component to rotate, so that the rotating component rotates and drives the compaction sleeve assembly to rotate. Under the action of the cleaning knife, the filler inside the compaction sleeve assembly is roughened.

[0023] Step 7: Repeat steps 2 to 6 to compact and roughen the second batch of filler;

[0024] Step 8: Repeat steps 2 to 4 to compact the second batch of packing.

[0025] The technical effects and advantages of this invention are as follows:

[0026] 1. By setting up a cleaning component, this invention avoids the situation where the nut loosens due to the vibration generated when the compaction component hammers the filler during the hammering process, which would eventually cause the small compaction cylinder to slip off the threaded rod of the positioning component.

[0027] 2. The present invention uses a cleaning component to clean the bottom of the compaction hammer of the compaction component with a cleaning blade, so as to avoid the hammer head sticking to soil and affecting the flatness after hammering.

[0028] 3. The present invention, through the cooperation between the rotating component and the cleaning component, scrapes the filler adhering to the inner wall of the compaction sleeve group to the center position after the first batch of filler is compacted, thereby avoiding the occurrence of uneven soil thickness after each layer is hammered.

[0029] 4. This invention utilizes the cooperation between the rotating component, the translation component, and the cleaning component to enable the cleaning blade to roughen the filler inside the compacted sleeve assembly, thereby automatically completing the roughening process and improving testing efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the workbench and half-gear rack and pinion cyclic falling assembly structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the connection between the worktable and the translation component structure of the present invention;

[0033] Figure 4 This is a schematic diagram showing the connection between the rotating component and the compaction sleeve assembly of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the half-gear rack and pinion cyclic falling assembly of the present invention;

[0035] Figure 6 This is a schematic diagram of the cleaning component structure connection of the present invention;

[0036] Figure 7 This is a schematic diagram of the angle adjustment component structure of the present invention.

[0037] In the diagram: 1. Workbench; 2. Translation assembly; 201. Slide rail; 202. Moving plate; 203. Lead screw; 3. Rotation assembly; 301. Rotary disk; 302. Fixing ring; 4. Half-gear rack and pinion circulating drop assembly; 401. Support box; 402. Support frame; 403. Half gear; 404. Rack; 405. Guide plate; 5. Cleaning assembly; 501. Guide rail pair; 502. Stepper motor; 503. Pneumatic telescopic rod; 504. Rotating column; 505. Support plate; 506. Multi-stage electric extension rod. 507. Retractable rod; 508. "U" shaped frame; 509. Cleaning knife; 6. Compacting assembly; 6001. Cylindrical rod; 602. Compacting hammer; 7. Compacting sleeve assembly; 701. Large compacting cylinder; 702. Small compacting cylinder; 8. Positioning assembly; 801. "U" shaped lug; 802. Threaded rod; 9. Angle adjustment assembly; 901. Round rod; 902. First guide groove; 903. Spiral guide groove; 904. Matching guide block; 905. Electromagnet; 906. Permanent magnet; 907. Compression spring; 10. Support leg. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] This invention provides, for example Figures 1 to 7 The test device for roadbed filler shown includes a workbench 1, a translation component 2 at the top of one end of the workbench 1, a rotation component 3 at the top of the translation component 2, a half-gear rack and pinion circulating drop component 4 and a cleaning component 5 at the top of the workbench 1, a compaction component 6 at the bottom of the half-gear rack and pinion circulating drop component 4, a compaction sleeve assembly 7 at the top of the rotation component 3, and a compaction sleeve assembly 7 whose top sidewall is connected to the rotation component 3 via a positioning component 8. The top of the compaction sleeve assembly 7 is provided with a plurality of limiting bosses arranged in a circumferential array.

[0040] Cleaning component 5 includes symmetrically arranged guide rail pairs 501, which are located at the bottom of support frame 402. Each guide rail pair 501 includes an upper guide rail and a lower guide rail, which are slidably connected. The guide rail pairs 501 guide the movement of the cleaning blade 508. Each guide rail pair 501 has a stepper motor 502 at its bottom, which adjusts the angle of the cleaning blade 508 to scrape soil from the edge of the compacted sleeve assembly 7 to the center. A pneumatic telescopic rod 503 is located at the bottom of each stepper motor 502, which adjusts the height of the cleaning blade 508 to accommodate different levels of roughening. Each of the telescopic rods 503 has a rotating column 504 fixed at its bottom. Each rotating column 504 has a support plate 505 rotatably connected to its side wall. The support plate 505 has an image acquisition and processing module at its bottom. By setting the image acquisition and processing module, the soil condition inside the compaction sleeve assembly 7 after real-time compaction can be obtained. The two support plates 505 are connected on opposite sides by a multi-stage electric telescopic rod 506. The rotating column 504 has a "U"-shaped frame 507 at its bottom. The inner walls of opposite sides of the "U"-shaped frame 507 are connected by an angle adjustment component 9. The cleaning blade 508 is adjusted by setting the angle adjustment component 9, thereby cleaning the side wall and bottom of the compaction hammer 602 of the compaction assembly 6.

[0041] The angle adjustment assembly 9 includes a round rod 901 rotatably connected to the inner wall of the opposite side of the "U"-shaped frame 507. The round rod 901 passes through the cleaning blade 508 and is fixedly connected to it. By setting the round rod 901, the round rod 901 drives the cleaning blade 508 to rotate, thereby adjusting the cleaning blade 508. The inner wall of the "U"-shaped frame 507 that contacts the peripheral side wall of the round rod 901 is provided with a first guide groove 902 parallel to the round rod 901. Each first guide groove 902 has a groove 900 at both ends. Two interconnected spiral guide grooves 903 have opposite rotation directions. Both ends of the round rod 901 are provided with guide blocks 904 that cooperate with the first guide groove 902. Both ends of the round rod 901 are provided with electromagnets 905. The inner wall of the "U"-shaped frame 507 opposite to the electromagnets 905 is provided with permanent magnets 906. Compression springs 907 are provided between the electromagnets 905 and the permanent magnets 906. The initial position of the guide block 904 is located in the first guide groove 902. At this time, the cleaning knife 508 is in a vertically downward state.

[0042] The bottom of the workbench 1 is provided with support legs 10, and a controller is provided on one side of the workbench 1; by setting the controller, the present invention facilitates the control of the test device and selects light or heavy compaction.

[0043] The translation component 2 includes a slide groove 201 formed on the top of the workbench 1. A movable plate 202 is slidably connected to the top of the slide groove 201. By setting the movable plate 202, the movable plate 202 drives the rotating component 3 and the compaction sleeve assembly 7 to move, thereby enabling the compaction component 6 to hammer different positions within the compaction sleeve assembly 7. The movable plate 202 is equipped with a lead screw 203 driven by a drive motor. The lead screw 203 passes through the workbench 1 and the movable plate 202. One end of the lead screw 203 is rotatably connected to the workbench 1, and the other end is threadedly connected to the movable plate 202. The drive motor is fixedly connected to the workbench 1. By setting the drive motor and controlling the start of the drive motor, the drive motor starts and drives the lead screw 203 to rotate. Under the action of the thread, the movable plate 202 slides along the slide groove 201, thereby realizing the translation of the translation component 2.

[0044] The rotating assembly 3 includes a rotating disk 301 that is rotatably connected to the top of the movable plate 202 and driven by a rotating motor. The rotating motor rotates and drives the rotating disk 301 to rotate. The top of the rotating disk 301 is provided with a fixing ring 302 that is fixedly connected by bolts. The top of the fixing ring 302 is provided with a positioning groove, and wax paper is provided on the top of the positioning groove. The rotation of the rotating disk 301 drives the fixing ring 302 to rotate, and the rotation of the fixing ring 302 will eventually drive the compaction sleeve assembly 7 to rotate.

[0045] The rack and pinion circulating drop assembly 4 includes a support box 401 disposed at one end of the top of the workbench 1. The support box 401 supports the rack and pinion circulating drop assembly 4. A support frame 402 is provided on the top side wall of the support box 401. By setting the support frame 402, the rack 404 is guided on one hand and the cleaning assembly 5 is supported on the other. The support box 401 contains a half gear 403 driven by a rotary motor. By setting the rotary motor, the rotary motor starts and drives the half gear 403 to rotate. The half gear 403 meshes with the rack 404. By setting the rack 404, the rotation of the half gear 403 will drive the rack 404 to move. The support frame 402 has a guide plate 405 on the side away from the support box 401. By setting the guide plate 405, the guide plate 405 and the support frame 402 jointly guide the rack 404. The guide plate 405 has a through groove that cooperates with the rack 404. The rack 404 is slidably connected to the inner arm of the guide plate 405. The present invention controls the start of the rotary motor. The rotary motor starts and drives the half gear 403 to rotate. The rotation of the half gear 403 will drive the rack 404 to move upward. When the rack 404 and the half gear 403 mesh and separate, under the action of gravity, the compaction component 6 makes a free fall motion along the through groove, thereby compacting the filling in the compaction sleeve assembly 7.

[0046] The compaction assembly 6 includes a cylinder 601 connected to the half-gear rack and pinion circulating drop assembly 4, and a compaction hammer 602 is fixedly connected to the bottom of the cylinder 601. The present invention compacts the packing in the compaction sleeve assembly 7 by setting the compaction hammer 602.

[0047] The compaction sleeve assembly 7 includes a large compaction sleeve 701 disposed at the top of the positioning groove, a small compaction sleeve 702 sleeved on the top of the large compaction sleeve 701, and a limiting boss disposed on the top of the small compaction sleeve 702. The present invention prevents the packing material poured into the compaction sleeve assembly 7 from exceeding the large compaction sleeve 701 due to the looseness of the packing material when hammering the last layer of packing material, thus preventing the packing material from falling from the opening of the large compaction sleeve 701 during hammering.

[0048] The positioning component 8 includes "U"-shaped lugs 801 arranged in a circumferential array on the top side wall of the small compaction cylinder 702 and a threaded rod 802 disposed on the top of the fixing ring 302. The top of the threaded rod 802 is provided with a nut for pressing the "U"-shaped lugs 801. By rotating the "U"-shaped lugs 801, the threaded rod 802 enters the "U"-shaped lugs 801. Then, by tightening the nut, the "U"-shaped lugs 801 are pressed, thereby pressing the small compaction cylinder 702 onto the large compaction cylinder 701, preventing the small compaction cylinder 702 from falling off the large compaction cylinder 701 during hammering.

[0049] In use, first place wax paper in the positioning groove at the top of the retaining ring 302, then place the large compaction cylinder 701 on top of the retaining ring 302, then fit the small compaction cylinder 702 on top of the large compaction cylinder 701, then rotate the small compaction cylinder 702 so that the threaded rod 802 enters the "U" shaped support 801, and then tighten the nut to press the "U" shaped support 801, thereby pressing the small compaction cylinder 702 onto the large compaction cylinder 701 to prevent the small compaction cylinder 702 from falling off the large compaction cylinder 701 during hammering; then apply petroleum jelly to the inner walls of the large compaction cylinder 701 and the small compaction cylinder 702.

[0050] The first batch of filler is poured into the large compaction cylinder 701. The controller starts the rotary motor, which in turn drives the half-gear 403 to rotate. The rotation of the half-gear 403 causes the rack 404 to move upwards. When the rack 404 engages and disengages from the half-gear 403, the compaction assembly 6 falls freely downwards along the through groove under gravity, thus compacting the filler inside the compaction sleeve assembly 7. During the free fall of the compaction assembly 6, a magnetic attraction force is generated between the electromagnet 905 at one end and the permanent magnet 906 at the other end, while a magnetic repulsion force is generated between them. This causes the round rod 901 to rotate along one of the spiral guide grooves 903, causing the cleaning blade 508 to rotate closer to the compaction assembly 6. When the blade is horizontal, the pneumatic telescopic rod 503 is extended, and multiple... The electric telescopic rod 506 extends, causing the cleaning blade 508 to contact the top of the small compaction cylinder 702. Then, by controlling two stepper motors 502 to rotate in the same direction and towards the opening of the "U"-shaped support 801, the stepper motors 502 rotate and drive the pneumatic telescopic rod 503 to rotate. The pneumatic telescopic rod 503 rotates and drives the rotating column 504 to rotate. The rotating column 504 rotates and drives the cleaning blade 508 to rotate. Under the action of the limiting boss, the cleaning blade 508 rotates and pushes the limiting boss and the small compaction cylinder 702 to rotate towards the opening of the "U"-shaped support 801. This ensures that the small compaction cylinder 702 always abuts against the threaded rod 802 of the positioning component 8, thereby preventing the nut from loosening due to the vibration generated when the compaction component 6 hammers the packing, and ultimately preventing the small compaction cylinder 702 from slipping off the threaded rod 802 of the positioning component 8.

[0051] After each hammering, the rotating motor is controlled to rotate, which in turn drives the rotating disk 301 to rotate. The rotating disk 301 then drives the fixed ring 302 to rotate, which in turn drives the compaction sleeve assembly 7 to rotate, thereby compacting the filler at different positions within the compaction sleeve assembly 7. Simultaneously, as the compaction assembly 6 rises, the multi-stage electric telescopic rod 506 and the pneumatic telescopic rod 503 are simultaneously controlled to retract, so that the cleaning blade 508 comes into contact with the compaction hammer 602 of the compaction assembly 6. Then, the stepper motor 502 is controlled to repeatedly rotate forward and backward, which in turn drives the cleaning blade 508 to clean the bottom of the compaction hammer 602 of the compaction assembly 6, preventing soil from sticking to the hammer head and affecting the flatness after hammering.

[0052] After the first batch of filler is compacted, the electromagnet 905 is de-energized. Under the elastic force of the compression spring 907, the round rod 901 drives the cleaning blade 508 to return to the vertical position. Then, the pneumatic telescopic rod 503 is extended, pushing the cleaning blade 508 into the compaction sleeve assembly 7. The stepper motor 502 is then rotated 45 degrees, and the multi-stage electric telescopic rod 506 is extended until the cleaning blade 508 contacts the inner wall of the compaction sleeve assembly 7. The pneumatic telescopic rod 503 is then extended, pushing the cleaning blade 508 into the filler. The rotary motor is then rotated, causing the compaction sleeve assembly 7 to rotate. Under the action of the cleaning blade 508, the filler adhering to the inner wall of the compaction sleeve assembly 7 is scraped to the center position, thus avoiding uneven soil thickness after each layer is hammered.

[0053] Then, the control motor starts, driving the lead screw 203 to rotate. Under the action of the thread, the lead screw 203 causes the moving plate 202 to slide along the slide groove 201, thereby changing the relative position of the cleaning knife 508 and the compaction sleeve assembly 7. Then, the control motor rotates, driving the compaction sleeve assembly 7 to rotate. Under the action of the cleaning knife 508, the filler in the compaction sleeve assembly 7 is roughened, thus automatically completing the roughening process and improving the test efficiency.

[0054] The present invention also provides a test method for highway subgrade fill material, the method comprising the following steps:

[0055] Step 1: Place wax paper inside the top of the rotating component 3, then place the compacting sleeve assembly 7 on the top of the rotating component 3, and then press the compacting sleeve assembly 7 onto the top of the rotating component 3 through the positioning component 8, and then apply Vaseline to the inner wall of the compacting sleeve assembly 7.

[0056] Step 2: Pour the first batch of filler into the compaction sleeve assembly 7, and start the half gear rack and pinion circulating drop assembly 4 to make the compaction assembly 6 at the bottom of the gear rack and pinion circulating drop assembly 4 perform a free-falling motion.

[0057] Step 3: When the compaction component 6 is in free fall, control the angle adjustment component 9 and the cleaning component 5 to make the cleaning blade 508 rotate and push the limiting boss and the compaction sleeve assembly 7 to rotate, so that the compaction sleeve assembly 7 always abuts against the positioning component 8.

[0058] Step 4: After each hammering, control the rotating component 3 to drive the compaction sleeve assembly 7 to rotate, thereby compacting the filler at different positions in the compaction sleeve assembly 7. At the same time, during the rising process of the compaction component 6, control the cleaning component 5 to make the cleaning knife 508 clean the bottom of the compaction hammer 602 of the compaction component 6.

[0059] Step 5: After the first batch of filler is compacted, the cleaning blade 508 is reset to the vertical position by controlling the angle adjustment component 9. Then, the cleaning component 5 is controlled to allow the cleaning blade 508 to enter the compaction sleeve assembly 7. The stepper motor 502 is then controlled to rotate 45 degrees, and the multi-stage electric telescopic rod 506 is simultaneously extended until the cleaning blade 508 contacts the inner wall of the compaction sleeve assembly 7. The pneumatic telescopic rod 503 is then controlled to extend and push the cleaning blade 508 into the filler. The rotating component 3 is then controlled to rotate and drive the compaction sleeve assembly 7 to rotate. Under the action of the cleaning blade 508, the filler adhering to the inner wall of the compaction sleeve assembly 7 is scraped to the center position.

[0060] Step 6: Control the moving component 2 to move the compacting sleeve assembly 7, so that the relative position of the cleaning knife 508 and the compacting sleeve assembly 7 changes. Then control the rotating component 3 to rotate, so that the rotating component 3 rotates and drives the compacting sleeve assembly 7 to rotate. Under the action of the cleaning knife 508, the filler inside the compacting sleeve assembly 7 is roughened.

[0061] Step 7: Repeat steps 2 to 6 to compact and roughen the second batch of filler;

[0062] Step 8: Repeat steps 2 to 4 to compact the second batch of packing.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A test device for highway subgrade fill material, comprising a workbench, characterized in that, The workbench has a translation component at one top, a rotation component at the top of the translation component, a half-gear rack and pinion circulating drop component and a cleaning component at the top of the workbench, a compaction component at the bottom of the half-gear rack and pinion circulating drop component, a compaction sleeve assembly at the top of the rotation component, and a compaction sleeve assembly connected to the rotation component via a positioning component at the top sidewall of the compaction sleeve assembly. Multiple limiting bosses are arranged in a circumferential array at the top of the compaction sleeve assembly. The cleaning component includes symmetrically arranged guide rail pairs, each with a stepper motor at its bottom. Each stepper motor has a pneumatic telescopic rod at its bottom, and a rotating column is fixed to the bottom of each pneumatic telescopic rod. Support plates are rotatably connected to the circumferential sidewalls of each rotating column. An image acquisition and processing module is located at the bottom of each support plate. Two opposing sides of the support plates are connected via a multi-stage electric telescopic rod. A "U"-shaped frame is located at the bottom of the rotating column, and a cleaning blade is connected between the inner walls of opposing sides of the "U"-shaped frame via an angle adjustment component. The angle adjustment assembly includes a round rod rotatably connected to the inner wall of the "U"-shaped frame on the opposite side. The round rod passes through the cleaning blade and is fixedly connected to it. The inner wall of the "U"-shaped frame that contacts the circumferential wall of the round rod is provided with a first guide groove parallel to the round rod. Each first guide groove has a spiral guide groove at both ends that communicates with the first guide groove. The two spiral guide grooves rotate in opposite directions. The circumferential walls at both ends of the round rod are provided with guide blocks that cooperate with the first guide grooves. Electromagnets are provided at both ends of the round rod. A permanent magnet is provided on the inner wall of the "U"-shaped frame opposite to the electromagnet. A compression spring is provided between the electromagnet and the permanent magnet.

2. The highway subgrade filler testing device according to claim 1, characterized in that, The workbench is equipped with support legs at the bottom and a controller on one side of the workbench.

3. The highway subgrade filler testing device according to claim 1, characterized in that, The translation component includes a slide groove on the top of the worktable, a movable plate slidably connected to the top of the slide groove, a lead screw driven by a drive motor is provided in the movable plate, the lead screw passes through the worktable and the movable plate, one end of the lead screw is rotatably connected to the worktable, and the other end is threadedly connected to the movable plate, and the drive motor is fixedly connected to the worktable.

4. The highway subgrade filler testing device according to claim 3, characterized in that, The rotating assembly includes a rotating disk rotatably connected to the top of the movable plate and driven by a rotating motor. The top of the rotating disk is provided with a fixing ring fixedly connected by bolts. The top of the fixing ring is provided with a positioning groove, and the top of the positioning groove is provided with wax paper.

5. The highway subgrade filler testing device according to claim 1, characterized in that, The half-gear rack and pinion circulating drop assembly includes a support box set at one end of the top of the workbench. The top side wall of the support box is provided with a support frame. The support box contains a half-gear driven by a rotary motor. The half-gear meshes with a rack. The support frame is provided with a guide plate on the side away from the support box. The guide plate has a through groove that mates with the rack. The rack is slidably connected to the inner arm of the guide plate.

6. The highway subgrade filler testing device according to claim 1, characterized in that, The compaction assembly includes a cylinder connected to a half-gear rack and pinion cyclic falling assembly, and a compaction hammer is fixedly connected to the bottom of the cylinder.

7. The highway subgrade filler testing device according to claim 4, characterized in that, The compaction sleeve assembly includes a large compaction sleeve disposed at the top of the positioning groove, a small compaction sleeve sleeved on the top of the large compaction sleeve, and a limiting boss disposed at the top of the small compaction sleeve.

8. A test device for highway subgrade filler material according to claim 7, characterized in that, The positioning component includes "U"-shaped lugs arranged in a circumferential array on the top side wall of the small compaction cylinder and a threaded rod disposed on the top of the fixing ring, wherein the top of the threaded rod is provided with a nut for pressing the "U"-shaped lugs.

9. A method for testing highway subgrade fill material, wherein the method utilizes a highway subgrade fill material testing apparatus as described in claim 1, characterized in that, The detailed operating steps of the method are as follows: Step 1: Place wax paper inside the top of the rotating component, then place the compaction sleeve assembly on top of the rotating component, and then press the compaction sleeve assembly tightly onto the top of the rotating component using the positioning component. Apply Vaseline to the inner wall of the compaction sleeve assembly. Step 2: Pour the first portion of filler into the compaction sleeve assembly, and start the half-gear rack and pinion circulating drop assembly, causing the compaction component at the bottom of the rack and pinion circulating drop assembly to undergo a free-fall motion. Step 3: While the compaction component is in free-fall motion, control the angle adjustment component and the cleaning component to rotate the cleaning blade and push the limiting boss and the compaction sleeve assembly to rotate, ensuring that the compaction sleeve assembly always rests against the positioning component. Step 4: After each hammer blow, control the rotating component to drive the compaction sleeve assembly to rotate, thereby compacting the filler at different positions within the compaction sleeve assembly. Simultaneously, during the rising process of the compaction component, control the cleaning component to allow the cleaning blade to clean the bottom of the compaction hammer of the compaction component. Step 5: After the first batch of packing is compacted, the cleaning blade is reset to a vertical position by controlling the angle adjustment component. Then, the cleaning blade is moved into the compaction sleeve assembly by controlling the cleaning component. The stepper motor is then rotated 45 degrees, and the multi-stage electric telescopic rod is extended until the cleaning blade contacts the inner wall of the compaction sleeve assembly. The pneumatic telescopic rod is then extended to push the cleaning blade into the packing. The rotating component is then rotated, causing the compaction sleeve assembly to rotate. Under the action of the cleaning blade, the packing adhering to the inner wall of the compaction sleeve assembly is scraped to the center position. Step 6: The moving component is controlled to move the compaction sleeve assembly, changing the relative position between the cleaning blade and the compaction sleeve assembly. The rotating component is then rotated, causing the compaction sleeve assembly to rotate. Under the action of the cleaning blade, the packing inside the compaction sleeve assembly is roughened. Step 7: Steps 2 to 6 are repeated to compact and roughen the second batch of packing. Step 8: Steps 2 to 4 are repeated to compact the second batch of packing.

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