Intelligent pressure resistance detection device for roadbed solid waste cushion mixture and detection method thereof

Abstract

The invention relates to the technical field of pressure resistance detection devices, in particular to an intelligent pressure resistance detection device for a roadbed solid waste cushion mixture and a detection method thereof.The intelligent pressure resistance detection device comprises a rack and a workbench used for placing a test block, a driving air cylinder is arranged on the rack, and a piston rod is installed at the output end of the driving air cylinder; an upper pressing plate for applying pressure to the test block is arranged at the bottom end of the piston rod, and two lateral clamping plates which are symmetrically distributed are arranged on the workbench; the two lateral clamping plates are matched with the piston rod through a linkage mechanism, when the piston rod moves downwards, the upper pressing plate is firstly driven to descend, and in the process, the two lateral clamping plates are kept static; when the upper pressing plate makes contact with the upper surface of the test block, the piston rod continues to move downwards, at the moment, the two lateral clamping plates synchronously and oppositely move to clamp the test block, vertical pressure and lateral pressure are applied to the test block at the same time in the testing process, the three-dimensional stress state of a mixture in the field compaction process is more close to simulation, and the test efficiency is improved. And the reliability of detection data is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of compressive strength testing devices, specifically an intelligent compressive strength testing device and method for roadbed solid waste cushion layer mixtures. Background Technology

[0002] The resource utilization of solid waste such as construction waste and industrial slag has become an important strategic task. Applying such solid waste to the subgrade layer of road engineering to form solid waste subgrade mixture is one of the effective ways to achieve large-scale and high-value utilization of bulk solid waste, which has significant environmental and economic benefits.

[0003] Compressive strength is a core indicator for ensuring roadbed stability and evaluating the mechanical properties of solid waste subbase mixtures. However, solid waste materials are widely sourced, have complex compositions, and uneven properties, resulting in significant differences in the mechanical behavior of their mixtures compared to traditional graded crushed stone materials. In particular, they are prone to local breakage or lateral slippage due to stress concentration during compression. This places higher demands on the stable clamping and accurate measurement of testing equipment. Currently, the testing of the compressive strength of such materials mainly relies on unconfined compressive strength tests using indoor universal testing machines. This method has obvious limitations: First, the stress state of the specimen on the press, such as without lateral constraint, does not match the actual triaxial stress state under compaction on site, affecting the accuracy of the test results. In addition, traditional equipment lacks an effective dynamic lateral constraint mechanism. When cracks appear in the specimen under high pressure, lateral instability or even slippage can easily occur, leading not only to test failure but also posing safety hazards and failing to accurately reflect the true compressive strength of solid waste mixtures.

[0004] Therefore, developing a device and method that can simulate actual working conditions, effectively prevent specimen slippage, and achieve accurate and efficient testing is crucial for promoting the standardized application and quality control of solid waste subbase mixtures. To this end, we provide an intelligent compressive strength testing device and method for roadbed solid waste subbase mixtures to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent compressive strength testing device and method for roadbed solid waste cushion layer mixtures. During testing, vertical and lateral pressures are applied simultaneously to the test block, more closely simulating the triaxial stress state of the mixture during on-site compaction. This significantly improves the reliability of the test data, addressing the issues raised in the background art where the stress state of the specimen on the press, without lateral constraint, does not match the actual triaxial stress state during on-site compaction, affecting the accuracy of the test results. Furthermore, traditional equipment lacks an effective dynamic lateral constraint mechanism, making it prone to lateral instability or even slippage when cracks appear under high pressure. This not only leads to test failure but also poses safety hazards and fails to accurately reflect the true compressive strength of the solid waste mixture.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A smart compressive strength testing device for roadbed solid waste cushion layer mixture includes a frame and a worktable for placing test blocks. A drive cylinder is provided on the frame, a piston rod is installed at the output end of the drive cylinder, and an upper pressure plate for applying pressure to the test block is provided at the bottom end of the piston rod. Two symmetrically distributed lateral clamps are provided on the worktable. The two lateral clamping plates are connected to the piston rod by a linkage mechanism. When the piston rod moves down, it first drives the upper pressure plate to descend, during which the two lateral clamping plates remain stationary. When the upper pressure plate contacts the upper surface of the test block, the piston rod continues to move down, and at this time the two lateral clamping plates move synchronously towards each other to clamp the test block.

[0007] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the frame is provided with a first limiting component for the up and down movement of the upper pressure plate. The first limiting component includes a guide hole opened on the frame and a guide rod fixed on the upper pressure plate, and the guide rod is disposed through the guide hole.

[0008] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: The linkage mechanism includes a bidirectional lead screw rotatably mounted on a workbench. Two sliding seats are provided above the workbench. Threaded sleeves that thread with the bidirectional lead screw are provided on the sliding seats. A second limiting component is provided on the workbench when the sliding seats move. A lateral clamp is connected to the sliding seats through a clearance component and moves synchronously with the sliding seats. The lateral clamp can move up and down on one side of the sliding seats. The bidirectional lead screw and piston rod are connected through a transmission mechanism. When the piston rod moves down, it first drives the upper pressure plate down. During this process, the bidirectional lead screw remains stationary. When the upper pressure plate contacts the upper surface of the test block, the piston rod continues to move down, at which point the bidirectional lead screw begins to rotate.

[0009] The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the second limiting component includes a horizontal guide rod fixed on the workbench and a guide ring fixed on the sliding seat, the guide ring being movably sleeved on the horizontal guide rod.

[0010] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the clearance component includes a mounting frame fixed on a sliding seat, a movable block is movably engaged in the mounting frame, springs are respectively connected between the top and bottom of the movable block and the inner wall of the mounting frame, and the lateral clamp is fixed to the movable block.

[0011] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: The transmission mechanism includes a first transmission shaft rotatably mounted on a frame. The first transmission shaft and a double-acting lead screw are driven by a worm gear mechanism. When the first transmission shaft rotates, it drives the double-acting lead screw to rotate synchronously. A transmission sleeve sleeved on a piston rod is rotatably mounted on the frame. The transmission sleeve and the first transmission shaft are driven by a gear mechanism. When the transmission sleeve rotates, it drives the first transmission shaft to rotate synchronously. The piston rod and the transmission sleeve are driven by a grooving mechanism. When the piston rod moves downward, it first drives the upper pressure plate to descend. During this process, the transmission sleeve remains stationary. When the upper pressure plate contacts the upper surface of the test block, the piston rod continues to move downward, at which point the transmission sleeve begins to rotate.

[0012] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the worm gear mechanism includes a worm fixed on a first transmission shaft and a worm wheel fixed on a bidirectional lead screw, wherein the worm and the worm wheel mesh.

[0013] An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the gear mechanism includes a first gear fixed on a first transmission shaft and a second gear fixed on a transmission sleeve, wherein the first gear meshes with the second gear.

[0014] The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described above: the grooving mechanism includes a guide groove opened on the surface of the piston rod and a ball that is movably embedded and locked in the inner wall of the transmission sleeve. The ball is movably locked in the guide groove and can roll in the groove where the guide groove is located. The guide groove is composed of a spiral groove and a straight groove connected together.

[0015] A method for detecting the compressive strength of a roadbed solid waste subbase mixture using an intelligent testing device includes the following steps: S1. Place the formed roadbed solid waste cushion layer mixture test block in the center of the workbench, with the side clamps in the open position; S2. Start the drive cylinder, so that its output end drives the piston rod and the upper pressure plate to move vertically downward together; during this stage, the side clamping plate remains stationary until the upper pressure plate is in complete contact with the upper surface of the test block and reaches a set pre-contact pressure for pre-compression; S3. After the upper pressure plate contacts the test block, the drive cylinder continues to drive the piston rod to move downward, converting the vertical movement of the piston rod into the synchronous opposite movement of the two side clamping plates, thereby clamping the test block from both sides; as the vertical pressure applied by the upper pressure plate increases, the clamping force provided by the side clamping plates increases synchronously. S4. During the entire pressurization process in step S3, the vertical pressure value is detected by a pressure sensor integrated into the upper pressure plate, and the vertical displacement value of the upper pressure plate is detected by a displacement sensor. The data is transmitted to the intelligent control unit in real time. The intelligent control unit automatically plots the stress-strain curve based on the collected pressure-displacement data and calculates the compressive strength and elastic modulus of the test block. S5. When the vertical pressure reaches the preset maximum value or the test block is damaged, the drive cylinder runs in reverse, causing the upper pressure plate to rise. The side clamps leave the surface of the test block under the action of the linkage mechanism, and the tested test block is taken out, completing one test cycle.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves intelligent timing control through a linkage mechanism, which first involves vertical pre-pressing by the upper pressure plate and then synchronous clamping by the lateral clamping plates on both sides. The lateral clamping force increases synchronously with the increase of the vertical pressure applied by the upper pressure plate, forming a "self-tightening" effect. This can dynamically adapt to the deformation of the specimen during the compression process, fundamentally solving the problem of lateral slippage or instability of solid waste mixture specimens under high pressure.

[0017] In addition, the present invention applies vertical pressure and dynamically adjusted lateral pressure to the test block simultaneously during testing. The constraint provided by the lateral clamps more closely simulates the triaxial stress state of the mixture during on-site compaction. This makes the measured parameters such as compressive strength more realistically reflect the mechanical properties of the material in the actual roadbed, significantly improving the reliability of the test data and its engineering guidance value. Attached Figure Description

[0018] Figure 1 This is a first-view schematic diagram of the overall structure of an intelligent compressive strength testing device for roadbed solid waste subbase mixture.

[0019] Figure 2 This is a schematic diagram of the overall structure from a second perspective of an intelligent compressive strength testing device for roadbed solid waste cushion layer mixture.

[0020] Figure 3 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 1A schematic diagram of the decomposed part of the structure.

[0021] Figure 4 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 1 A schematic diagram of the decomposed part of the structure.

[0022] Figure 5 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 4 A schematic diagram of the decomposed part of the structure.

[0023] Figure 6 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 5 Enlarged structural diagram at point A in the middle.

[0024] Figure 7 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 4 A schematic diagram of the decomposed part of the structure.

[0025] Figure 8 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 7 A schematic diagram of the decomposed part of the structure.

[0026] Figure 9 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 8 A schematic diagram of the decomposed part of the structure.

[0027] Figure 10 This is an intelligent compressive strength testing device for roadbed solid waste subbase mixture. Figure 9 Enlarged structural diagram at point B.

[0028] In the diagram: 1. Frame; 2. Worktable; 3. Drive cylinder; 4. Piston rod; 5. Upper pressure plate; 6. Guide rod; 7. Guide hole; 8. Side clamping plate; 9. Sliding seat; 10. Guide ring; 11. Horizontal guide rod; 12. Double-acting lead screw; 13. Threaded sleeve; 14. First drive shaft; 15. Worm gear; 16. Worm wheel; 17. Drive sleeve; 18. First gear; 19. Second gear; 20. Guide groove; 21. Ball bearing; 22. Mounting frame; 23. Movable block; 24. Spring. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Please see Figures 1-10As an embodiment of the present invention, an intelligent compressive strength testing device for roadbed solid waste cushion layer mixture includes a frame 1 and a workbench 2 for placing roadbed solid waste cushion layer mixture test blocks. A drive cylinder 3 is provided on the frame 1, and a piston rod 4 is installed at the output end of the drive cylinder 3. An upper pressure plate 5 for applying pressure to the test block is provided at the bottom end of the piston rod 4. Two symmetrically distributed lateral clamps 8 are provided on the workbench 2. The two lateral clamping plates 8 are connected to the piston rod 4 through a linkage mechanism. When the piston rod 4 moves down, it first drives the upper pressure plate 5 to descend. During this process, the two lateral clamping plates 8 remain stationary. When the upper pressure plate 5 contacts the upper surface of the test block, the piston rod 4 continues to move down. At this time, the two lateral clamping plates 8 move synchronously towards each other to clamp the test block.

[0031] In this embodiment, the formed roadbed solid waste cushion layer mixture test block is placed at the center of the workbench 2, with the lateral clamping plates 8 in the open position; the piston rod 4 and the upper pressure plate 5 move vertically downward together; during this stage, the lateral clamping plates 8 remain stationary until the upper pressure plate 5 is in complete contact with the upper surface of the test block and reaches a set pre-contact pressure for pre-pressing; after the upper pressure plate 5 contacts the test block, it continues to drive the piston rod 4 downward, converting the vertical movement of the piston rod 4 into the synchronous opposite movement of the two lateral clamping plates 8, thereby clamping the roadbed solid waste cushion layer mixture test block from both sides; as the vertical pressure applied by the upper pressure plate 5 increases, the clamping force provided by the lateral clamping plates 8 increases synchronously.

[0032] As a further embodiment of the present invention, the frame 1 is provided with a first limiting component for the upper pressure plate 5 to move up and down. The first limiting component includes a guide hole 7 opened on the frame 1 and a guide rod 6 fixed on the upper pressure plate 5. The guide rod 6 is disposed through the guide hole 7.

[0033] In this embodiment, the guide rod 6 is installed through the guide hole 7. That is, when the upper pressure plate 5 moves up and down, the guide rod 6 and the guide hole 7 can limit the movement of the upper pressure plate 5. The first limiting component ensures that the upper pressure plate 5 can only move in a strictly vertical direction, preventing it from deflecting or shaking during the pressurization process, thus ensuring the stability of pressurization and the accuracy of test data.

[0034] As a further embodiment of the present invention, the linkage mechanism includes a bidirectional lead screw 12 rotatably mounted on the workbench 2. Two sliding seats 9 are provided above the workbench 2. The sliding seats 9 are provided with threaded sleeves 13 that are threadedly engaged with the bidirectional lead screw 12. The workbench 2 is provided with a second limiting component when the sliding seats 9 move. The lateral clamping plate 8 is connected to the sliding seats 9 through a clearance component and moves synchronously with the sliding seats 9. The lateral clamping plate 8 can move up and down on one side of the sliding seats 9. The bidirectional lead screw 12 and the piston rod 4 are connected through a transmission mechanism. When the piston rod 4 moves down, it first drives the upper pressure plate 5 to descend. During this process, the bidirectional lead screw 12 remains stationary. When the upper pressure plate 5 contacts the upper surface of the test block, the piston rod 4 continues to move down. At this time, the bidirectional lead screw 12 begins to rotate.

[0035] In this embodiment, when the piston rod 4 moves down, it first drives the upper pressure plate 5 on it to descend synchronously. During this process, the bidirectional lead screw 12 remains stationary. After the upper pressure plate 5 contacts the upper surface of the test block, the piston rod 4 continues to move down, driving the upper pressure plate 5 to continue pressing down. At this time, the bidirectional lead screw 12 begins to rotate. When the bidirectional lead screw 12 rotates, it uses its threaded engagement with the threaded sleeve 13 to drive the two threaded sleeves 13 to move synchronously, thereby driving the two sliding seats 9 to move synchronously towards or away from each other, thereby driving the side clamping plate 8 to clamp or loosen the roadbed solid waste cushion layer mixture test block.

[0036] As a further embodiment of the present invention, the second limiting component includes a horizontal guide rod 11 fixed on the worktable 2 and a guide ring 10 fixed on the sliding seat 9, with the guide ring 10 movably sleeved on the horizontal guide rod 11.

[0037] In this embodiment, the guide ring 10 is movably sleeved on the horizontal guide rod 11. When the sliding seat 9 moves, the cooperation between the horizontal guide rod 11 and the guide ring 10 provides precise horizontal guidance for the sliding seat 9, ensuring that the sliding seat 9 moves smoothly and will not rotate with the rotation of the bidirectional lead screw 12.

[0038] As a further embodiment of the present invention, the clearance component includes a mounting frame 22 fixed on the sliding seat 9, a movable block 23 is movably engaged inside the mounting frame 22, and springs 24 are respectively connected between the top and bottom of the movable block 23 and the inner wall of the mounting frame 22, and a side clamping plate 8 is fixed to the movable block 23.

[0039] In this embodiment, a movable block 23 is movably engaged within the mounting frame 22, allowing the movable block 23 to move up and down within the mounting frame 22. This allows the lateral clamping plate 8 to have a certain floating capability in the vertical direction. When the surface of the test block is uneven or deforms unevenly after being pressed, its two sides still contact the lateral clamping plate 8. Therefore, the test block can move up and down slightly in sync with the lateral clamping plate 8. The spring 24 can be compressed or extended to compensate for this and prevent the mechanism from jamming.

[0040] As a further embodiment of the present invention, the transmission mechanism includes a first transmission shaft 14 rotatably mounted on the frame 1. The first transmission shaft 14 and the double-acting lead screw 12 are driven by a worm gear mechanism. When the first transmission shaft 14 rotates, it drives the double-acting lead screw 12 to rotate synchronously. A transmission sleeve 17 sleeved on the piston rod 4 is rotatably mounted on the frame 1. The transmission sleeve 17 and the first transmission shaft 14 are driven by a gear mechanism. When the transmission sleeve 17 rotates, it drives the first transmission shaft 14 to rotate synchronously. The piston rod 4 and the transmission sleeve 17 are driven by a grooving mechanism. When the piston rod 4 moves downward, it first drives the upper pressure plate 5 to descend. During this process, the transmission sleeve 17 remains stationary. When the upper pressure plate 5 contacts the upper surface of the test block, the piston rod 4 continues to move downward, and at this time, the transmission sleeve 17 begins to rotate.

[0041] In this embodiment, when the piston rod 4 moves downward, it first drives the upper pressure plate 5 to descend, during which the transmission sleeve 17 remains stationary. After the upper pressure plate 5 contacts the upper surface of the test block, the piston rod 4 continues to move downward. At this time, the transmission sleeve 17 begins to rotate. Through the gear mechanism, the rotation of the transmission sleeve 17 drives the first transmission shaft 14 to rotate synchronously. Through the worm gear mechanism, the rotation of the first transmission shaft 14 drives the bidirectional lead screw 12 to rotate synchronously. This transmission mechanism ultimately converts the linear motion of the piston rod 4 into the rotational motion of the bidirectional lead screw 12.

[0042] As a further embodiment of the present invention, the worm gear mechanism includes a worm 15 fixed on a first transmission shaft 14 and a worm wheel 16 fixed on a bidirectional lead screw 12, wherein the worm 15 and the worm wheel 16 mesh.

[0043] In this embodiment, when the first drive shaft 14 rotates, it drives the worm 15 to rotate. The worm 15 and the worm wheel 16 mesh together to drive the worm wheel 16 to rotate, which in turn drives the bidirectional lead screw 12 to rotate.

[0044] As a further embodiment of the present invention, the gear mechanism includes a first gear 18 fixed on the first transmission shaft 14 and a second gear 19 fixed on the transmission sleeve 17, wherein the first gear 18 meshes with the second gear 19.

[0045] In this embodiment, when the transmission sleeve 17 rotates, it drives the second gear 19 to rotate. The first gear 18 is driven to rotate by meshing with the second gear 19, thereby driving the first transmission shaft 14 to rotate.

[0046] As a further embodiment of the present invention, the grooving mechanism includes a guide groove 20 formed on the surface of the piston rod 4 and a ball bearing 21 that is movably embedded and engaged in the inner wall of the transmission sleeve 17. The ball bearing 21 is movably engaged in the guide groove 20 and can roll in the channel where the guide groove 20 is located. The guide groove 20 is composed of a spiral groove and a straight groove that are connected to each other.

[0047] In this embodiment, when the piston rod 4 initially moves downward, the ball 21 rolls in the straight groove section, and the piston rod 4 slides purely downward relative to the transmission sleeve 17. The transmission sleeve 17 does not rotate. When the upper pressure plate 5 contacts the test block, it begins to pre-press the test block. When the upper pressure plate 5 continues to move downward, the ball 21 enters the spiral groove section from the straight groove section. The ball 21 continues to roll in the spiral groove section. The continued downward movement of the piston rod 4 drives the transmission sleeve 17 to rotate spirally, thereby driving the transmission sleeve 17 to rotate.

[0048] In use, the intelligent compressive strength testing device for roadbed solid waste cushion layer mixture has two lateral clamps 8 in an open state. A pre-formed solid waste cushion layer mixture test block is placed on the workbench 2 between the two lateral clamps 8. The drive cylinder 3 is activated, pushing the piston rod 4 and the upper pressure plate 5 downwards. At this time, the guide groove 20 on the piston rod 4 is in the straight section, and the balls 21 only roll vertically without driving the transmission sleeve 17 to rotate. The lateral clamps 8 remain stationary, and the upper pressure plate 5 continues to descend until it contacts the upper surface of the test block and applies a small pre-pressure. After the upper pressure plate 5 contacts the test block, the drive cylinder 3 continues to push the piston rod 4 downwards. At this time, because the upper pressure plate 5 is blocked by the test block, the resistance on the piston rod 4 increases, forcing the balls 21 to enter the spiral section from the straight section of the guide groove 20. The continued downward motion of the piston rod 4 is thus converted into a spiral motion relative to the transmission sleeve 17. This drives the transmission sleeve 17 to rotate, which in turn drives the bidirectional lead screw 12 to rotate. The rotation of the bidirectional lead screw 12 causes the two threaded sleeves 13 and the sliding seat 9 fixed thereto to move synchronously in opposite directions along the horizontal guide rod 11, thereby pushing the lateral clamping plates 8 on both sides to clamp the test block. The greater the vertical pressure applied by the drive cylinder 3, the greater the downward distance of the piston rod 4, thus causing the bidirectional lead screw 12 to rotate continuously. The lateral clamping force generated by the lateral clamping plates 8 is also increased synchronously, forming an adaptive tightening effect of "the harder the pressure, the stronger the clamping". During the entire pressurization process, the pressure sensor is integrated on the upper pressure plate 5 to detect vertical displacement and collect data in real time, which is transmitted to the intelligent control unit for processing and analysis. When the test piece is damaged or the preset conditions are met, the drive cylinder 3 reverses, the upper pressure plate 5 is lifted, and each mechanism moves in reverse order. The lateral clamping plates 8 are released and reset, completing one test.

[0049] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. An intelligent compressive strength testing device for roadbed solid waste cushion layer mixture, comprising a frame (1) and a workbench (2) for placing test blocks, characterized in that, The frame (1) is provided with a drive cylinder (3), the output end of the drive cylinder (3) is equipped with a piston rod (4), the bottom end of the piston rod (4) is provided with an upper pressure plate (5) for applying pressure to the test block, and the workbench (2) is provided with two symmetrically distributed side clamps (8). The two lateral clamps (8) are connected to the piston rod (4) by a linkage mechanism. When the piston rod (4) moves down, it first drives the upper pressure plate (5) to descend. During this process, the two lateral clamps (8) remain stationary. When the upper pressure plate (5) contacts the upper surface of the test block, the piston rod (4) continues to move down. At this time, the two lateral clamps (8) move synchronously towards each other to clamp the test block.

2. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 1, characterized in that, The frame (1) is provided with a first limiting component for the upper pressure plate (5) to move up and down. The first limiting component includes a guide hole (7) opened on the frame (1) and a guide rod (6) fixed on the upper pressure plate (5). The guide rod (6) is provided through the guide hole (7).

3. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 1, characterized in that, The linkage mechanism includes a bidirectional lead screw (12) rotatably mounted on the workbench (2). Two sliding seats (9) are provided above the workbench (2). A threaded sleeve (13) that is threadedly engaged with the bidirectional lead screw (12) is provided on the sliding seat (9). A second limiting component is provided on the workbench (2) when the sliding seat (9) moves. The side clamp (8) is connected to the sliding seat (9) through a clearance component and moves synchronously with the sliding seat (9). The side clamp (8) can move up and down on one side of the sliding seat (9). The bidirectional lead screw (12) and the piston rod (4) are connected through a transmission mechanism. When the piston rod (4) moves down, it first drives the upper pressure plate (5) to descend. During this process, the bidirectional lead screw (12) remains stationary. When the upper pressure plate (5) contacts the upper surface of the test block, the piston rod (4) continues to move down. At this time, the bidirectional lead screw (12) begins to rotate.

4. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 3, characterized in that, The second limiting component includes a horizontal guide rod (11) fixed on the worktable (2) and a guide ring (10) fixed on the sliding seat (9), wherein the guide ring (10) is movably sleeved on the horizontal guide rod (11).

5. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 3, characterized in that, The clearance component includes a mounting frame (22) fixed on a sliding seat (9), a movable block (23) is movably engaged inside the mounting frame (22), and springs (24) are respectively connected between the top and bottom of the movable block (23) and the inner wall of the mounting frame (22). The side clamp (8) is fixed to the movable block (23).

6. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 3, characterized in that, The transmission mechanism includes a first transmission shaft (14) rotatably mounted on the frame (1). The first transmission shaft (14) and the double-acting screw (12) are driven by a worm gear mechanism. When the first transmission shaft (14) rotates, it will drive the double-acting screw (12) to rotate synchronously. A transmission sleeve (17) sleeved on the piston rod (4) is rotatably mounted on the frame (1). The transmission sleeve (17) and the first transmission shaft (14) are driven by a gear mechanism. When the transmission sleeve (17) rotates, it will drive the first transmission shaft (14) to rotate synchronously. The piston rod (4) and the transmission sleeve (17) are driven by a grooving mechanism. When the piston rod (4) moves down, it first drives the upper pressure plate (5) to descend. During this process, the transmission sleeve (17) remains stationary. When the upper pressure plate (5) contacts the upper surface of the test block, the piston rod (4) continues to move down. At this time, the transmission sleeve (17) begins to rotate.

7. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 6, characterized in that, The worm gear mechanism includes a worm (15) fixed on a first transmission shaft (14) and a worm wheel (16) fixed on a double-acting lead screw (12), wherein the worm (15) and the worm wheel (16) mesh.

8. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 6, characterized in that, The gear mechanism includes a first gear (18) fixed on a first transmission shaft (14) and a second gear (19) fixed on a transmission sleeve (17), wherein the first gear (18) meshes with the second gear (19).

9. The intelligent compressive strength testing device for roadbed solid waste cushion layer mixture according to claim 6, characterized in that, The grooving mechanism includes a guide groove (20) formed on the surface of the piston rod (4) and a ball (21) that is movably embedded and engaged in the inner wall of the transmission sleeve (17). The ball (21) is movably engaged in the guide groove (20) and can roll in the channel where the guide groove (20) is located. The guide groove (20) is composed of a spiral groove and a straight groove that are connected.

10. A detection method for an intelligent compressive strength testing device for roadbed solid waste cushion layer mixture as described in any one of claims 1-9, characterized in that, Includes the following steps, S1. Place the formed roadbed solid waste cushion layer mixture test block in the center of the workbench (2), with the side clamps (8) in the open position; S2. Start the drive cylinder (3) so that its output end drives the piston rod (4) and the upper pressure plate (5) to move vertically downward together; during this stage, the side clamp (8) remains stationary until the upper pressure plate (5) is in complete contact with the upper surface of the test block and reaches a set pre-contact pressure for pre-pressing; S3. After the upper pressure plate (5) contacts the test block, the driving cylinder (3) continues to drive the piston rod (4) to move down, converting the vertical movement of the piston rod (4) into the synchronous opposite movement of the two side clamping plates (8), thereby clamping the test block from both sides; as the vertical pressure applied by the upper pressure plate (5) increases, the clamping force provided by the side clamping plates (8) increases synchronously. S4. During the entire pressurization process in step S3, the vertical pressure value is detected by the pressure sensor integrated in the upper pressure plate (5), the vertical displacement value of the upper pressure plate (5) is detected by the displacement sensor, and the data is transmitted to the intelligent control unit in real time; the intelligent control unit automatically plots the stress-strain curve based on the collected pressure-displacement data, and calculates the compressive strength and elastic modulus of the test block. S5. When the vertical pressure reaches the preset maximum value or the test block is damaged, the drive cylinder (3) runs in reverse, causing the upper pressure plate (5) to rise, and the side clamp (8) leaves the surface of the test block under the action of the linkage mechanism, and the tested test block is taken out to complete one test cycle.

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