Cement stabilized soil dry-wet cycle experiment device

Abstract

The invention discloses a cement stabilized soil dry-wet cycle experiment device, and relates to the technical field of civil engineering material experiments, the cement stabilized soil dry-wet cycle experiment device comprises an experiment support, the side part of which is provided with a platform; the water storage tank is fixed on the experiment bracket; the circulating device is rotationally arranged on the experiment bracket and is positioned above the water storage tank; the driving device is fixed at one end of the experiment bracket and is used for driving the circulating device; the five groups of rotation detection devices are annularly distributed, each group of rotation detection devices comprises two rotation detection devices, and the rotation detection devices are arranged on the circulating device; the air blowing mechanism is fixed on the platform and corresponds to the side part of the circulating device; the drying device is arranged right above the circulating device and is fixedly connected with the air blowing mechanism; and the sample is fixed between the two rotation detection devices in the same group. Compared with the prior art, the dry-wet cycle experiment is automatically carried out on multiple groups of samples, and the accuracy and reliability of experiment results are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering material experiments, and more specifically to a cement stabilized soil dry-wet cycle experimental device. Background Art

[0002] In the crushed or originally loose soil, sufficient cement and water are added. After compaction and curing, when the compressive strength of the mixture obtained by mixing meets the specified requirements, it is called cement stabilized soil. Cement stabilized soil can be applied to the base and subbase of highways at all levels. As an important building material, the performance evaluation of cement stabilized soil is crucial to ensure the quality of the project. In the prior art, the dry-wet cycle test method is usually adopted to simulate the dry-wet alternation process that the material may experience in the actual use environment, to deeply understand the physical and chemical changes of cement stabilized soil under the action of dry-wet alternation, and to evaluate the durability and stability of cement stabilized soil under such conditions. However, the traditional dry-wet cycle test device may not be able to accurately control the experimental conditions, and only a single sample is subjected to a cycle test. The data obtained is single, and the automation degree of some equipment is low, resulting in low experimental efficiency, which may introduce human errors and affect the accuracy and reliability of the experimental results. Therefore, it is necessary to provide a cement stabilized soil dry-wet cycle test device to solve the problems raised in the above background technology. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: a cement stabilized soil dry-wet cycle experimental device, comprising: An experimental stand having a platform on its side; The water storage tank is fixed on the experimental support; The circulation device is horizontally rotatably arranged on the experimental support and is located above the water storage tank; A driving device, fixed to one end of the experimental support, used to drive the circulation device; A rotation detection device is arranged on the circulation device, wherein the rotation detection devices are arranged in five groups in an annular distribution, each group is symmetrically arranged with two rotation detection devices, and the two rotation detection devices 5 in the same group are on the same horizontal plane; A blowing mechanism is fixed on the platform and corresponds to the side of the circulation device; The drying device is arranged directly above the circulation device and is fixedly connected to the blowing mechanism; The sample is fixed between two rotation detection devices in the same group.

[0004] Furthermore, as a preferred embodiment, a filter screen is provided inside the water storage tank, and a drain port and a water injection port are provided at both ends of the bottom. That is to say, driven by the circulation device, the rotating detection device and the sample are driven to rotate and enter the water storage tank, and the sample is rotated and immersed. Under the action of the drain port and the water injection port, the water level inside the water storage tank is adjusted. When the sample enters the water storage tank, water is continuously injected into the water storage tank through the water injection port so that the water level submerges the sample and the sample is fully immersed. After reaching the predetermined immersion time, the water can be discharged through the drain port so that the water level is lower than the position of the sample, and the immersion of the sample is stopped. After the sample undergoes multiple dry-wet cycle experiments, the sample is prone to cracking and falling debris. Under the action of the filter screen, the debris dropped by the sample is collected and processed to prevent the debris from clogging the drain port.

[0005] Further, preferably, the circulation device comprises: A central rotating shaft is rotatably arranged on the experimental support, and one end of the central rotating shaft is fixedly connected to the driving device; Two fixed circular surfaces are symmetrically arranged, fixed on the central rotating shaft, and located on the inner side of the water storage tank; Connecting horizontal plates, there are five groups of circular distribution, each group has two symmetrically distributed, fixed on the inner side of the fixed circular surface; The spacer panels are arranged in five circular arrangements, and both ends are fixedly connected to the connecting horizontal plates; There are five guide arc plates distributed in an annular manner, with two ends fixed to the inner side of the fixed circular surface, and two sides respectively fixedly connected to the adjacent spacing panels, and the guide arc plates are located below the rotation detection device.

[0006] That is to say, under the action of the spacing panel, the circulation device is divided into five parts, and five groups of samples can be subjected to dry-wet cycle experiments at the same time. Driven by the driving device, the circulation device is driven to rotate intermittently through the central shaft, thereby driving multiple groups of samples to conduct dry-wet cycle experiments.

[0007] Further, as a preferred embodiment, the partition panel divides the circulation device into five working areas, and the working areas are the first immersion area, the second immersion area, the removal area, the drying area and the test area in a clockwise direction, and the first immersion area and the second immersion area are both located in the water storage tank. That is to say, the sample is sequentially installed between the rotation detection device at the test area, and as the driving device drives the central shaft to rotate, the sample enters the first immersion area and the second immersion area in turn, and the sample is immersed in the water storage tank. After reaching the predetermined immersion time, the central shaft rotates to drive the sample at the second immersion area to enter the removal area, and the residual water on the sample is removed by the blowing action of the blowing mechanism and the rotation action of the rotation detection device at the removal area, and then the central shaft rotates to drive the sample to enter the drying area, and is dried by the drying device. Under the action of the blowing mechanism, the gas flow in the drying device is promoted to accelerate the drying rate. After drying, the central shaft rotates to drive the sample back to the test area, and under the action of the rotation detection device, the sample is subjected to a pressure test to detect the compressive strength of the sample. After the test is completed, the operation is repeated to enter a new round of dry-wet cycle.

[0008] It should be noted that the immersion time of the sample can be controlled by rotating the central shaft to make the sample actively separate from the water tank, or by controlling the water level inside the water tank. Multiple groups of samples can be set up for comparative experiments with the same immersion and wetting time, or multiple groups of samples can be set up for comparative experiments with different immersion and wetting times. The experimental methods are varied and comparison groups are provided, which is more valuable for reference.

[0009] Further, as a preference, the rotation detection device comprises: A rotating assembly is rotatably arranged inside the fixed circular surface and arranged in the working area; A pressurizing assembly, fixed inside the rotating assembly; The fixed component is fixedly connected to the rotating component at one end and fixedly connected to the sample at the other end. That is, under the action of the rotating component, the fixed component drives the sample to rotate in the working area, promoting the sample to be quickly soaked and wetted in the water storage tank and quickly dried in the drying device. In the test area, the pressurizing component is used to perform a pressurizing test on the sample to detect the compressive strength of the sample after the dry-wet cycle.

[0010] Further, as a preference, the rotating assembly comprises: A protective shell is rotatably arranged on the inner side of the fixed circular surface and is fixedly connected to an external waterproof motor. The waterproof motor is fixed on the outer side of the fixed circular surface and is located on the inner side of the water storage tank. A through hole is provided at the center of one end of the protective shell away from the fixed circular surface. The telescopic outer arc plates are symmetrically arranged in two groups, each group is linearly arranged with two telescopic outer arc plates, the two telescopic outer arc plates in the same group are respectively fixedly connected to the pressurizing component and the fixing component, and a compression spring is arranged in the telescopic outer arc plate; Two telescopic inner arc plates are symmetrically distributed, and both ends are respectively slidably arranged in the telescopic outer arc plates of the same group, and the two ends of the telescopic inner arc plates are fixedly connected to the compression springs.

[0011] That is to say, driven by the waterproof motor, the protective shell is driven to rotate on the inner side of the fixed circular surface, and then the fixed component is driven to rotate through the telescopic outer arc plate and the telescopic inner arc plate, and the fixed component drives the sample to rotate, so that the sample rotates in the water tank and is fully in contact with the water body to be moistened, so that the sample can be quickly dried in the drying device.

[0012] Further, as a preference, the pressurizing component comprises: A square connector, one end of which is fixed to the inner wall of the protective shell, and the other end of which is fixedly connected to the telescopic outer arc plate; Two tooth paths are symmetrically arranged and fixed on the inner side of the square connector; A moving assembly is movably arranged between the square connecting pieces and connected to the gear track; A push shaft is fixed to a side of the moving component close to the protective shell on which a through hole is provided, and the push shaft passes through the center of the through hole; The pressure plate is fixedly connected to the pushing shaft and is arranged on the outside of the protective shell, corresponding to the end of the sample.

[0013] That is to say, when the central shaft drives the sample to rotate to the test area, the rotating component stops rotating, that is, the sample stops rotating, and then the moving components in the pressure components on both sides of the sample move toward the position of the sample on the tooth path, and then the pressure plate is driven to separate from the through hole of the protective shell through the push shaft, and a pressure test is performed on both sides of the sample to detect the compressive strength of the sample. At the same time, if the sample shrinks due to the action of the pressure plate, the telescopic inner arc plate extends out from the telescopic outer arc plates at both ends to stretch the compression spring. After the pressure test, the moving components in the pressure components on both sides move to a position away from the sample on the tooth path, and then the pressure plate is driven to be retracted through the push shaft to close the through hole of the protective shell to prevent the water in the water tank from entering the protective shell when the sample is moistened, thereby affecting the pressure components.

[0014] Further, as a preference, the moving component comprises: A positioning frame, arranged between the tooth paths, wherein a rotating gear set is arranged inside the positioning frame; A rotating motor is fixed on the top of the positioning frame, and the rotating motor is fixedly connected to the rotating gear set; There are two transmission gears symmetrically distributed, which mesh with the tooth track and the rotating gear set respectively.

[0015] That is to say, driven by the rotating motor, the transmission gears on both sides are driven to rotate in different directions through the rotating gear set inside the positioning frame, and then the transmission gears on both sides rotate in different directions on the gear track, driving the moving component to move on the gear track, and then the pressure plate is driven to move through the push shaft to perform a pressure test on both ends of the sample.

[0016] Further, as a preference, the fixing assembly comprises: A fixing ring is arranged on the outside of the sample, and the side of the fixing ring is fixedly connected to the telescopic outer arc plate; A plurality of transmission screws are provided in an annular distribution and are rotatably arranged on a fixed ring; A plurality of fixed cambered surfaces are provided in an annular distribution, fixed on the transmission screw and arranged on the inner side of the fixed ring; The telescopic shafts are symmetrically provided with two connecting the fixed arc surface and the fixed ring; A control gear is rotatably disposed on the transmission screw and is located outside the fixing ring; The driving gear ring is rotatably arranged on a side of the fixing ring away from the telescopic outer arc plate, and the driving gear ring is meshed with the control gear.

[0017] That is to say, after placing the two ends of the sample between the fixed arc surfaces, the driving gear ring is rotated forward, and the control gear is driven to rotate on the fixed ring by the driving gear ring, and then under the restriction of the telescopic shaft, the transmission screw moves toward the center, driving the fixed arc surface to fix the sample. After the experiment, it is only necessary to reverse the driving gear ring, and drive the control gear to rotate on the fixed ring by the driving gear ring, and then under the restriction of the telescopic shaft, the transmission screw moves outward, driving the fixed arc surface to separate from the sample, and the sample can be removed.

[0018] Further, as a preference, the blowing mechanism comprises: Blower, fixed on the platform; The conveying pipe has one end fixed to the air outlet of the blower and the other end fitted to the circulation device; A rotating shaft is rotatably arranged at one end of the conveying pipeline close to the circulation device, and the rotating shaft is arranged parallel to the central rotating shaft; The guide surface is arranged in the conveying pipeline and is fixedly connected to the rotating shaft.

[0019] That is to say, when the sample rotates to the removal area, the rotating shaft drives the guide surface to rotate upward, closing the channel from the conveying pipeline to the drying area. At this time, the blower drives the airflow to enter the removal area through the guide surface, and the airflow flows along the partition panel to the guide arc plate, and then flows out through the adjacent partition panel. At the same time, the rotating component drives the sample to rotate in the direction opposite to the airflow flow direction, and the excess water on the sample is removed under the action of the airflow counterattack; when the sample rotates to the drying area, the rotating shaft drives the guide surface to rotate downward, closing the channel from the conveying pipeline to the removal area. At this time, the blower drives the airflow to enter the drying area through the guide surface, and with the assistance of the drying device, drives the drying gas to flow, thereby promoting rapid drying of the sample.

[0020] It should be noted that after the circulation device rotates, the middle of the output end of the conveying pipeline always corresponds to the partition panel, so that the air flow in the blower can enter the removal area and the drying area.

[0021] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a circulation device is provided to carry out a dry-wet cycle experiment on a plurality of cement-stabilized soil samples, and the accuracy and reliability of the experimental results are effectively improved by comparing a plurality of groups of data; a rotating detection device is provided to fix the sample and drive the sample to rotate, so that the sample can be completely wetted in water and can be fully and comprehensively dried during drying; a pressurizing device is provided to pressurize the sample after being wetted and dried to detect the compressive strength of the sample, and the sample will not be unloaded during the entire dry-wet cycle and pressurization test process, thereby avoiding disturbance of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a cement-stabilized soil dry-wet cycle experimental device; Figure 2 This is a schematic diagram of the water storage tank structure in a cement stabilized soil dry-wet cycle experimental device; Figure 3 It is a schematic diagram of the structure of a circulation device in a cement stabilized soil dry-wet cycle experimental device; Figure 4 A schematic diagram of the working area in a cement stabilized soil dry-wet cycle experimental device; Figure 5 It is a structural schematic diagram of a rotation detection device and a circulation device in a cement stabilized soil dry-wet cycle experimental device; Figure 6 It is a structural schematic diagram of a rotation detection device in a cement stabilized soil dry-wet cycle experimental device; Figure 7 It is a schematic diagram of the structure of the rotating component and the pressurizing component in a cement stabilized soil dry-wet cycle experimental device; Figure 8It is a three-dimensional structural schematic diagram of a rotating component and a pressurizing component in a cement-stabilized soil dry-wet cycle experimental device; Fig. 9 It is a schematic diagram of the structure of a mobile component in a cement stabilized soil dry-wet cycle experimental device; Fig.10 This is a schematic diagram of the structure of fixed components in a cement stabilized soil dry-wet cycle experimental device; Fig.11 It is a schematic diagram of the structure of the air blowing mechanism in a cement stabilized soil dry-wet cycle experimental device; In the figure: 1. Experimental support; 2. Water storage tank; 3. Circulation device; 4. Driving device; 5. Rotation detection device; 6. Blowing mechanism; 7. Drying device; 8. Sample; 11. Platform; 21. Filter; 22. Drainage outlet; 23. Water injection port; 31. Central rotating shaft; 32. Fixed circular surface; 33. Connecting horizontal plate; 34. Spacer panel; 35. Guide arc plate; 36. Working area; 51. Rotation component; 52. Pressurization component; 53. Fixed component; 61. Blower; 62. Delivery pipeline; 63. Rotation shaft; 64. Guide surface; 361. First immersion area; 36 2. Second immersion area; 363. Removal area; 364. Drying area; 365. Testing area; 511. Waterproof motor; 512. Protective shell; 513. Telescopic outer arc plate; 514. Telescopic inner arc plate; 521. Square connector; 522. Gearway; 523. Moving assembly; 524. Push shaft; 525. Pressure plate; 531. Fixed ring; 532. Transmission screw; 533. Fixed arc surface; 534. Telescopic shaft; 535. Control gear; 536. Drive gear ring; 5231. Positioning frame; 5232. Rotating motor; 5233. Transmission gear. DETAILED DESCRIPTION

[0023] See also Figures 1 to 11 In an embodiment of the present invention, a cement stabilized soil dry-wet cycle experimental device comprises: An experimental stand 1, with a platform 11 on its side; A water storage tank 2 is fixed on the experimental support 1; The circulation device 3 is horizontally rotatably arranged on the experimental support 1 and is located above the water storage tank 2; A driving device 4, fixed to one end of the experimental support 1, for driving the circulation device 3; The rotation detection device 5 is arranged on the circulation device 3. The rotation detection devices 5 are arranged in five groups in an annular distribution, and each group is symmetrically arranged with two rotation detection devices 5, and the two rotation detection devices 5 in the same group are on the same horizontal plane; The air blowing mechanism 6 is fixed on the platform 11 and corresponds to the side of the circulation device 3; The drying device 7 is arranged directly above the circulation device 3 and is fixedly connected to the blowing mechanism 6; The sample 8 is fixed between two rotation detection devices 5 in the same group.

[0024] In this embodiment, the water storage tank 2 is provided with a filter screen 21 inside, and a drain port 22 and a water injection port 23 are provided at both ends of the bottom. That is to say, driven by the circulation device 3, the rotation detection device 5 and the sample 8 are driven to rotate and enter the water storage tank 2, and the sample 8 is rotated and immersed. Under the action of the drain port 22 and the water injection port 23, the water level inside the water storage tank 2 is adjusted. When the sample 8 enters the water storage tank 2, water is continuously injected into the water storage tank 2 through the water injection port 23, so that the water level submerges the sample 8, and the sample 8 is fully immersed. After reaching the predetermined immersion time, the water can be discharged through the drain port 22, so that the water level is lower than the position of the sample 8, and the immersion of the sample 8 is stopped. After the sample 8 undergoes multiple dry-wet cycle experiments, the sample 8 is prone to cracking and falling debris. Under the action of the filter screen 21, the debris dropped by the sample 8 is collected and processed to prevent the debris from clogging the drain port 22.

[0025] In this embodiment, the circulation device 3 includes: A central rotating shaft 31 is rotatably disposed on the experimental support 1, and one end of the central rotating shaft 31 is fixedly connected to the driving device 4; Two fixed circular surfaces 32 are symmetrically arranged, fixed on the central rotating shaft 31 and located on the inner side of the water storage tank 2; The connecting transverse plates 33 are provided in five groups in an annular distribution, and each group is provided with two symmetrically distributed plates, which are fixed on the inner side of the fixed circular surface 32; The spacer panels 34 are five in an annular arrangement, and both ends are fixedly connected to the connecting horizontal plate 33; There are five guide arc plates 35 distributed in an annular shape, with two ends fixed to the inner side of the fixed circular surface 32 , and two sides respectively fixedly connected to the adjacent spacing panels 34 , and the guide arc plates 35 are located below the rotation detection device 5 .

[0026] That is to say, under the action of the spacing panel 34, the circulation device 3 is divided into five parts, and five groups of samples 8 can be subjected to dry-wet cycle experiments at the same time. Driven by the driving device 4, the circulation device 3 is driven to rotate intermittently through the central shaft 31, thereby driving multiple groups of samples 8 to perform dry-wet cycle experiments.

[0027] In this embodiment, the partition panel 34 divides the circulation device 3 into five working areas 36, and the working areas 36 are respectively a first immersion area 361, a second immersion area 362, a removal area 363, a drying area 364 and a testing area 365 in a clockwise direction, and the first immersion area 361 and the second immersion area 362 are both located in the water tank 2. That is to say, at the test area 365, the sample 8 is installed between the rotation detection device 5 in sequence. As the driving device 4 drives the central shaft 31 to rotate, the sample 8 enters the first immersion area 361 and the second immersion area 362 in sequence, and is immersed in the water storage tank 2. After the predetermined immersion time is reached, the central shaft 31 rotates to drive the sample 8 in the second immersion area 362 to enter the removal area 363. In the removal area 363, the residual water on the sample 8 is removed by the blowing action of the blowing mechanism 6 and the rotation action of the rotation detection device 5. Then the central shaft 31 rotates to drive the sample 8 into the drying area 364, and is dried by the drying device 7. Under the action of the blowing mechanism 6, the gas flow in the drying device 7 is promoted to accelerate the drying rate. After drying, the central shaft 31 rotates to drive the sample 8 back to the test area 365. Under the action of the rotation detection device 5, a pressurization test is performed on the sample 8 to detect the compressive strength of the sample 8. After the detection is completed, the operation is repeated to enter a new round of dry-wet cycle.

[0028] It should be noted that the immersion time of the sample 8 can be controlled by rotating the central shaft 31 to make the sample 8 actively separate from the water storage tank 2, or by controlling the water level inside the water storage tank 2. Multiple groups of samples 8 can be set to conduct comparative experiments under the same immersion and wetting time, or multiple groups of samples 8 can be set to conduct comparative experiments under different immersion and wetting times. The experimental methods are varied and a comparison group is provided, which is more valuable for reference.

[0029] In this embodiment, the rotation detection device 5 includes: The rotating assembly 51 is rotatably disposed inside the fixed circular surface 32 and disposed in the working area 36; A pressurizing component 52 is fixed inside the rotating component 51; The fixed component 53 is fixedly connected to the rotating component 51 at one end and fixedly connected to the sample 8 at the other end. That is, under the action of the rotating component 51, the fixed component 53 drives the sample 8 to rotate in the working area 36, ​​so as to promote the sample 8 to be quickly soaked and wetted in the water storage tank 2 and quickly dried in the drying device 7. In addition, in the test area 365, the pressurizing component 52 performs a pressurizing test on the sample 8 to detect the compressive strength of the sample 8 after the dry-wet cycle.

[0030] In this embodiment, the rotating assembly 51 includes: The protective shell 512 is rotatably disposed on the inner side of the fixed circular surface 32 and is fixedly connected to an external waterproof motor 511. The waterproof motor 511 is fixed on the outer side of the fixed circular surface 32 and is located on the inner side of the water storage tank 2. A through hole is provided at the center of one end of the protective shell 512 away from the fixed circular surface 32. The telescopic outer arc plates 513 are symmetrically arranged in two groups, each group is linearly arranged with two telescopic outer arc plates 513, the two telescopic outer arc plates 513 in the same group are respectively fixedly connected to the pressurizing component 52 and the fixing component 53, and a compression spring is arranged in the telescopic outer arc plates 513; Two telescopic inner arc plates 514 are symmetrically distributed, and both ends are slidably arranged in the telescopic outer arc plates 513 of the same group, and both ends of the telescopic inner arc plates 514 are fixedly connected to the compression springs.

[0031] That is to say, driven by the waterproof motor 511, the protective shell 512 is driven to rotate on the inner side of the fixed circular surface 32, and then the fixed component 53 is driven to rotate through the telescopic outer arc plate 513 and the telescopic inner arc plate 514, and the fixed component 53 drives the sample 8 to rotate, so that the sample 8 rotates in the water storage tank 2 and is fully in contact with the water body to be moistened, so that the sample 8 is quickly dried in the drying device 7.

[0032] In this embodiment, the pressurizing component 52 includes: A square connector 521, one end of which is fixed to the inner wall of the protective housing 512, and the other end of which is fixedly connected to the telescopic outer arc plate 513; Two tooth paths 522 are symmetrically arranged and fixed on the inner side of the square connecting member 521; The moving assembly 523 is movably disposed between the square connecting members 521 and connected to the tooth path 522; A push shaft 524 is fixed to a side of the moving component 523 close to the through hole provided on the protective shell 512, and the push shaft 524 passes through the center of the through hole; The pressure plate 525 is fixedly connected to the pushing shaft 524 and is disposed outside the protective shell 512 , corresponding to the end of the sample 8 .

[0033] That is to say, after the central rotating shaft 31 drives the sample 8 to rotate to the test area 365, the rotating component 51 stops rotating, that is, the sample 8 stops rotating, and then the moving components 523 in the pressure components 52 on both sides of the sample 8 move toward the position of the sample 8 on the tooth path 522, and then drive the pressure plate 525 to disengage from the through hole of the protective shell 512 through the push shaft 524, and perform a pressure test on both sides of the sample 8 to detect the compressive strength of the sample 8. At the same time, if the sample 8 shrinks due to the action of the pressure plate 525, the telescopic inner arc plate 514 extends out from the telescopic outer arc plate 513 at both ends to stretch the compression spring. After the pressure test is completed, the moving components 523 in the pressure components 52 on both sides move to a position away from the sample 8 on the tooth path 522, and then drive the pressure plate 525 to be retracted through the push shaft 524 to close the through hole of the protective shell 512 to prevent the water in the water storage tank 2 from entering the protective shell 512 when the sample 8 is moistened, thereby affecting the pressure component 52.

[0034] In this embodiment, the moving component 523 includes: A positioning frame 5231 is disposed between the tooth paths 522, and a rotating gear set is disposed inside the positioning frame 5231; The rotating motor 5232 is fixed on the top of the positioning frame 5231, and the rotating motor 5232 is fixedly connected to the rotating gear set; There are two transmission gears 5233 symmetrically arranged, which are respectively meshed with the tooth track 522 and the rotating gear set.

[0035] That is to say, driven by the rotating motor 5232, the rotating gear set inside the positioning frame 5231 drives the transmission gears 5233 on both sides to rotate in different directions, and then the transmission gears 5233 on both sides rotate in different directions on the tooth path 522, driving the moving component 523 to move on the tooth path 522, and then driving the pressure plate 525 to move through the push shaft 524, and performing a pressure test on both ends of the sample 8.

[0036] In this embodiment, the fixing assembly 53 includes: A fixing ring 531 is arranged on the outside of the sample 8, and a side portion of the fixing ring 531 is fixedly connected to the telescopic outer arc plate 513; A plurality of transmission screws 532 are provided in an annular arrangement and are rotatably disposed on the fixed ring 531; A plurality of fixed arc surfaces 533 are provided in an annular distribution, fixed on the transmission screw 532, and arranged on the inner side of the fixed ring 531; Two telescopic shafts 534 are symmetrically arranged to connect the fixed arc surface 533 and the fixed ring 531; A control gear 535 is rotatably disposed on the transmission screw 532 and is located outside the fixing ring 531; The driving gear ring 536 is rotatably disposed on a side of the fixing ring 531 away from the telescopic outer arc plate 513 , and the driving gear ring 536 is meshed with the control gear 535 .

[0037] That is to say, after placing the two ends of the sample 8 between the fixed arc surfaces 533, the driving gear ring 536 is rotated forward, and the driving gear ring 536 rotates on the fixed ring 531 to drive the control gear 535 to rotate, and then under the restriction of the telescopic shaft 534, the transmission screw 532 moves toward the center, driving the fixed arc surface 533 to fix the sample 8. After the experiment, it is only necessary to reverse the driving gear ring 536, and drive the driving gear ring 536 to rotate on the fixed ring 531 to drive the control gear 535 to rotate, and then under the restriction of the telescopic shaft 534, the transmission screw 532 moves outward, driving the fixed arc surface 533 to separate from the sample 8, and the sample 8 can be removed.

[0038] In this embodiment, the blowing mechanism 6 includes: A blower 61 is fixed on the platform 11; The delivery pipe 62 has one end fixed to the air outlet of the blower 61 and the other end fitted to the circulation device 3; A rotating shaft 63 is rotatably disposed at one end of the conveying pipe 62 close to the circulation device 3, and the rotating shaft 63 is disposed parallel to the central rotating shaft 31; The guide surface 64 is disposed in the conveying pipe 62 and fixedly connected to the rotating shaft 63 .

[0039] That is to say, when the sample 8 rotates to the removal area 363, the rotating shaft 63 drives the guide surface 64 to rotate upward, closing the passage from the conveying pipe 62 to the drying area 364. At this time, the blower 61 drives the airflow to enter the removal area 363 through the guide surface 64, and the airflow flows along the partition panel 34 to the guide arc plate 35, and then flows out through the adjacent partition panel 34. At the same time, the rotating component 51 drives the sample 8 to rotate in the direction opposite to the flow direction of the airflow, and the excess water on the sample 8 is removed under the action of the airflow counteraction; when the sample 8 rotates to the drying area 364, the rotating shaft 63 drives the guide surface 64 to rotate downward, closing the passage from the conveying pipe 62 to the removal area 363. At this time, the blower 61 drives the airflow to enter the drying area 364 through the guide surface 64, and with the assistance of the drying device 7, drives the drying gas to flow, thereby promoting rapid drying of the sample 8.

[0040] It should be noted that after the circulation device 3 rotates, the middle of the output end of the conveying pipe 62 always corresponds to the partition panel 34, so that the airflow in the blower 61 can enter the removal area 363 and the drying area 364.

[0041] In the specific implementation, the sample 8 is first installed between the rotation detection device 5 at the test area 365 in sequence. As the driving device 4 drives the central rotating shaft 31 to rotate, the sample 8 enters the first immersion area 361 and the second immersion area 362 in sequence. At the same time, the rotating component 51 drives the sample 8 to rotate in the water storage tank 2 through the fixing component 53 to immerse the sample 8. After reaching the predetermined immersion time, the central rotating shaft 31 rotates to drive the sample 8 at the second immersion area 362 to enter the removal area 363. At this time, the rotating shaft 63 in the blowing mechanism 6 drives the guide surface 64 to rotate upward to immerse the conveying pipeline. 62 to the drying area 364 is closed, at this time, the blower 61 drives the airflow to enter the removal area 363 through the guide surface 64, and at the same time, the rotating component 51 drives the sample 8 to rotate in the direction opposite to the airflow direction, and the excess water on the sample 8 is removed under the counteraction of the airflow, and then the central shaft 31 rotates to drive the sample 8 into the drying area 364. At this time, the rotating shaft 63 in the blowing mechanism 6 drives the guide surface 64 to rotate downward, and the passage of the conveying pipe 62 to the removal area 363 is closed. At this time, the blower 61 drives the airflow to enter the drying area 364 through the guide surface 64. With the assistance of the drying device 7, The drying gas is driven to flow, and the sample 8 is promoted to dry quickly. After drying, the central shaft 31 rotates to drive the sample 8 back to the test area 365. At this time, the rotating assembly 51 stops rotating, that is, the sample 8 stops rotating. Then, the moving assembly 523 in the pressurizing assembly 52 on both sides of the sample 8 moves to the position of the sample 8 on the tooth path 522, and then the pressurizing plate 525 is driven to separate from the through hole of the protective shell 512 through the pushing shaft 524, and a pressurizing test is performed on both sides of the sample 8 to detect the compressive strength of the sample 8. At the same time, if the sample 8 is contracted by the pressurizing plate 525, the telescopic inner arc plate 514 is on both sides. The end telescopic outer arc plate 513 extends out to stretch the compression spring. After the pressurization test is completed, the moving components 523 in the pressurization components 52 on both sides move on the tooth path 522 to a position away from the sample 8, and then drive the pressurization plate 525 to be retracted through the push shaft 524 to close the through hole of the protective shell 512, and then carry out the next round of dry and wet experiments. During the pressurization test, if the sample 8 is squeezed to produce cracks and debris, when it is soaked and moistened again, the debris will fall off and be collected and processed by the filter screen 21 to prevent the debris from clogging the drain port 22 and preventing the debris from affecting subsequent experiments.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cement stabilized soil dry-wet cycle experimental device, characterized in that: include: An experimental stand (1) having a platform (11) on its side; A water storage tank (2) is fixed on the experimental support (1); A circulation device (3) is horizontally rotatably arranged on the experimental support (1) and is located above the water storage tank (2); A driving device (4) fixed to one end of the experimental support (1) and used to drive the circulation device (3); A rotation detection device (5) is arranged on the circulation device (3), wherein the rotation detection devices (5) are arranged in five groups in an annular arrangement, each group having two rotation detection devices (5) symmetrically arranged, and the two rotation detection devices (5) in the same group are located on the same horizontal plane; An air blowing mechanism (6) is fixed on the platform (11) and corresponds to the side of the circulation device (3); A drying device (7) is arranged directly above the circulation device (3) and is fixedly connected to the air blowing mechanism (6); A sample (8) is fixed between two rotation detection devices (5) in the same group; The circulation device (3) comprises: A central rotating shaft (31) is rotatably mounted on the experimental support (1), and one end of the central rotating shaft (31) is fixedly connected to the driving device (4); Two fixed circular surfaces (32) are symmetrically arranged and fixed on the central rotating shaft (31) and located on the inner side of the water storage tank (2); The connecting transverse plates (33) are provided in five groups in an annular arrangement, each group having two symmetrically distributed plates, and are fixed on the inner side of the fixed circular surface (32); Five spacing panels (34) are provided in an annular arrangement, and both ends of the spacing panels are respectively fixedly connected to the connecting transverse plate (33), and the spacing panels (34) divide the circulation device (3) into five working areas (36); Five guide arc plates (35) are provided in an annular arrangement, with two ends fixed to the inner side of the fixed circular surface (32), and two sides respectively fixedly connected to adjacent spacing panels (34), and the guide arc plates (35) are located below the rotation detection device (5); The rotation detection device (5) comprises: A rotating assembly (51) is rotatably disposed on the inner side of the fixed circular surface (32) and is disposed in the working area (36); A pressurizing component (52) is fixed inside the rotating component (51); A fixed component (53) has one end fixedly connected to the rotating component (51) and the other end fixedly connected to the sample (8).

2. A cement-stabilized soil dry-wet cycle experimental device according to claim 1, characterized in that: The water storage tank (2) is provided with a filter screen (21) inside, and a water outlet (22) and a water inlet (23) are provided at two ends of the bottom respectively.

3. A cement-stabilized soil dry-wet cycle experimental device according to claim 1, characterized in that: The working area (36) is, in clockwise direction, a first immersion area (361), a second immersion area (362), a removal area (363), a drying area (364), and a testing area (365), and the first immersion area (361) and the second immersion area (362) are both located in the water storage tank (2).

4. The dry-wet cycle experimental device for cement-stabilized soil according to claim 1, characterized in that: The rotating assembly (51) comprises: A protective shell (512) is rotatably disposed on the inner side of the fixed circular surface (32) and fixedly connected to an external waterproof motor (511); the waterproof motor (511) is fixed on the outer side of the fixed circular surface (32) and is located on the inner side of the water storage tank (2); a through hole is provided at the center of one end of the protective shell (512) away from the fixed circular surface (32); The telescopic outer arc plates (513) are symmetrically distributed in two groups, with each group having two telescopic outer arc plates distributed in a straight line, and the two telescopic outer arc plates (513) in the same group are respectively fixedly connected to the pressurizing component (52) and the fixing component (53), and a compression spring is provided in the telescopic outer arc plates (513); Two telescopic inner arc plates (514) are symmetrically arranged, and both ends are respectively slidably arranged in the telescopic outer arc plates (513) of the same group, and both ends of the telescopic inner arc plates (514) are fixedly connected to the compression springs.

5. A cement-stabilized soil dry-wet cycle experimental device according to claim 4, characterized in that: The pressurizing component (52) comprises: A square connecting piece (521), one end of which is fixed to the inner wall of the protective shell (512), and the other end of which is fixedly connected to the telescopic outer arc plate (513); Two tooth paths (522) are symmetrically arranged and fixed on the inner side of the square connecting member (521); A moving assembly (523) is movably disposed between the square connecting members (521) and connected to the tooth path (522); A push shaft (524) is fixed to a side of the moving component (523) close to a through hole provided on the protective shell (512), and the push shaft (524) passes through the center of the through hole; The pressure plate (525) is fixedly connected to the pushing shaft (524), and is arranged outside the protective housing (512) and corresponds to the end of the sample (8).

6. A cement-stabilized soil dry-wet cycle experimental device according to claim 5, characterized in that: The moving component (523) comprises: A positioning frame (5231) is arranged between the tooth paths (522), and a rotating gear set is provided inside the positioning frame (5231); A rotating motor (5232) is fixed on the top of the positioning frame (5231), and the rotating motor (5232) is fixedly connected to the rotating gear set; The transmission gears (5233) are symmetrically arranged in two and mesh with the tooth path (522) and the rotating gear set respectively.

7. A cement-stabilized soil dry-wet cycle experimental device according to claim 6, characterized in that: The fixing assembly (53) comprises: A fixing ring (531) is arranged on the outside of the sample (8), and a side portion of the fixing ring (531) is fixedly connected to the telescopic outer arc plate (513); A plurality of transmission screw rods (532) are provided in an annular distribution and are rotatably disposed on the fixed ring (531); A plurality of fixed cambered surfaces (533) are provided in an annular distribution, fixed on the transmission screw (532), and arranged on the inner side of the fixed ring (531); Two telescopic shafts (534) are symmetrically arranged and connected to the fixed arc surface (533) and the fixed ring (531); A control gear (535) is rotatably mounted on the transmission screw (532) and is located outside the fixing ring (531); The driving gear ring (536) is rotatably arranged on a side of the fixed ring (531) away from the telescopic outer arc plate (513), and the driving gear ring (536) is meshed with the control gear (535).

8. The cement-stabilized soil dry-wet cycle experimental device according to claim 1, characterized in that: The blowing mechanism (6) comprises: A blower (61) is fixed on the platform (11); A conveying pipe (62), one end of which is fixed to the air outlet of the blower (61), and the other end of which is in contact with the circulation device (3); A rotating shaft (63) is rotatably arranged at one end of the conveying pipeline (62) close to the circulation device (3), and the rotating shaft (63) is arranged parallel to the central rotating shaft (31); The flow guide surface (64) is arranged in the conveying pipe (62) and is fixedly connected to the rotating shaft (63).

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