A model test device for saline soil roadbed under different working conditions

Abstract

This invention relates to the field of saline soil technology, and more particularly to a test device for saline soil subgrade models under different working conditions. It solves the problem in existing technologies that, in order to utilize saline soil more widely and meet the engineering construction needs of saline soil areas, it is necessary to provide a reasonable basis for judging the suitability of subgrade fillers in saline soil areas, requiring testing of saline soil subgrade structures under different working conditions. The test device for saline soil subgrade models under different working conditions includes a support base, two support side frames fixedly connected to both sides of the top of the support base, and two drive mechanisms mirror-mounted on the top of the support base. Both sides of the two drive mechanisms are detachably connected to the side walls of the adjacent support side frames. Several sets of detection components are arranged at the top between the two drive mechanisms. This invention has a reasonable structure, facilitates comprehensive and rapid testing, and allows for various combinations of tests, greatly improving the comprehensiveness of the testing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of saline soil, and particularly relates to a saline soil roadbed model test device under different working conditions. BACKGROUND

[0002] If saline soil is selected as roadbed filler, saline soil swelling, dissolution and corrosion and other types of roadbed diseases will be faced, which is directly related to the quality and service life of the roadbed; if non-saline soil filler is selected, transportation costs, non-saline soil purchase costs, original saline soil treatment costs, and prolonged construction period and other problems will be faced.

[0003] Saline soil swelling is caused by the absorption of water by sodium sulfate in the saline soil body due to the decrease of the ambient temperature, resulting in the expansion of the soil body, and with the increase of the ambient temperature, water is released from the sodium sulfate, causing the soil body to shrink and collapse; dissolution is caused by the high solubility of sodium chloride in the saline soil body, and after water enters the roadbed, the sodium chloride salt that plays a cementing role is dissolved, destroying the soil structure characteristics and causing the roadbed to deform and sink.

[0004] In the production of the roadbed, it is necessary to test the proportion and position of the saline soil, so it is necessary to use saline soil in different parts of the roadbed, and in order to ensure that the saline soil can be used in a larger range and meet the engineering construction needs of the saline soil area, it is important to treat the garbage, especially to provide a reasonable judgment basis for the applicability of the saline soil area roadbed filler, and it is necessary to test the saline soil roadbed structure under different working conditions, so we propose a saline soil roadbed model test device under different working conditions to solve the above problems. SUMMARY

[0005] The present application aims to provide a saline soil roadbed model test device under different working conditions, which solves the problem of providing a reasonable judgment basis for the applicability of the saline soil area roadbed filler in order to use the saline soil in a larger range and meet the engineering construction needs of the saline soil area, and the saline soil roadbed structure needs to be tested under different working conditions.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A saline soil roadbed model test device under different working conditions, comprising a support base, two support side frames fixedly connected to the top of the support base on both sides, and two drive mechanisms arranged on the top of the support base and mirror images of each other.

[0008] Both sides of the two drive mechanisms are detachably connected to the side walls of the adjacent support side frame. Several sets of detection components are provided at the top between the two drive mechanisms, and several sets of placement components are provided at the bottom between them.

[0009] The detection assembly includes a detection tube, a lifting mechanism at the top of the detection tube, a pressurizing component that cooperates with the inside of the detection tube at the top of the detection tube, a sealing ring that contacts the roadbed surface fixedly connected to the bottom edge of the detection tube, a connecting pipe and a pressure relief valve connected to one side of the detection tube, and several electric heating tubes installed inside the tube wall.

[0010] Preferably, the drive mechanism includes two sliding frames that are respectively connected to the side walls of the support side frames on both sides, and three moving plates arranged horizontally and linearly along the horizontal direction of the support side frames. The two ends of the middle moving plate are fixedly connected to the side walls of the sliding frames, and the two ends of the moving plates on both sides are slidably connected to the side walls of the adjacent sliding frames.

[0011] Preferably, a central rod is provided at the center of one side of each of the movable plates, and mounting plates connected to the side walls of the movable plates are rotatably connected to both ends of the central rod. External threads are provided on the outer rings of both ends of the central rod, and the two external threads are mirror images of each other.

[0012] Preferably, a drive source mounting bracket is fixedly connected to one side of the mounting plate on one side. A motor is fixedly connected to the inside of the drive source mounting bracket by bolts. The output shaft of the motor passes through the mounting plate and is connected to one end of the center rod via a bushing. A mounting seat is connected to the center of one side of the middle moving plate. Both ends of the mounting seat are provided with mounting grooves. A hydraulic cylinder is installed inside each of the two mounting grooves. The output end of the hydraulic cylinder is connected to a positioning component that is fixedly connected to the side wall of the adjacent moving plate by bolts. Each moving plate has three moving grooves on its top.

[0013] Preferably, the detection assembly comprises three sets, each set of which includes three detection tubes. The lifting mechanism includes a connecting frame detachably connected to the outer ring of the detection tube and a power plate disposed on the top of the connecting frame. The top of the power plate is connected to two sliding plates that are slidably connected to the moving groove. The top of the two sliding plates is connected by a crossbar. At the center of the top of the crossbar is a sliding rod that is adapted to and slidably connected to the sliding groove and passes through the sliding groove. One end of the sliding rod is connected to a moving support plate that is threadedly connected to the external thread of the central rod.

[0014] Preferably, a power box is installed at the top center of the power plate, and the output end of the power box is connected to the top of the connecting frame through a sliding sleeve. Side plates are fixedly connected to the bottom of both sides of the connecting frame. A guide rod is vertically installed at the top of the side plate, with one end passing through the side plate through the sliding sleeve. The top end of the guide rod is connected to the side wall of the power plate.

[0015] Preferably, the placement assembly includes three sets, each set of placement assemblies includes three placement plates, and each placement plate has a sliding rod that is fixedly connected to the bottom two sides of the placement plate and slidably connected to the sliding groove. The bottom center of the placement plate is connected to a sliding base plate that is threaded and matched with the external thread of the center rod through a sliding rod that is slidably connected to the sliding groove.

[0016] Preferably, the top of the placement plate has an annular groove, and four vertical rods are arranged in a circular array on the top of the placement plate along the circumference of the annular groove. Each vertical rod has an inclined guide rod fixedly connected to its top end.

[0017] Preferably, the outer ring of the detection tube is slidably connected to a sliding ring, and a right-angle baffle is provided on one side of the sliding ring. One side of the right-angle baffle is connected to the outer ring of the sliding ring through several fixing rods. A cylinder is connected to the top of the outer ring of the detection tube through a mounting bracket, and the output end of the cylinder is connected to the outer ring of the sliding ring.

[0018] Preferably, the pressurization assembly includes a top plate bolted to the top end of the detection tube and a sleeve fixedly connected to the bottom center of the top plate. A second piston plate is slidably connected inside the sleeve. A round rod with one end passing through the sleeve via a sealing sleeve is fixedly connected to the bottom center of the second piston plate. The bottom end of the round rod is connected to a first piston plate adapted to the inner ring of the detection tube. A second pressure relief valve is installed on one side of the top of the top cover. The input end of the second pressure relief valve is connected to one side of the sleeve via a pipe. A booster pump is installed on one side of the detection tube. The output end of the booster pump is connected to the top end of the sleeve via a pipe passing through the top plate.

[0019] This invention has at least the following beneficial effects:

[0020] In this invention, by setting up a support base, support side frame, drive mechanism, detection component, placement component, and detection tube, the roadbed is placed on top of the placement component. The lifting mechanism moves one end of the detection tube until the sealing ring contacts and adheres tightly to the surface of the roadbed. Water is injected into the detection tube through a connecting pipe, heated by an electric heating element, and pressurized by a pressurizing component. This allows for simultaneous testing of the roadbed's compressive strength, heat resistance, and permeability. Furthermore, by setting up several sets of detection components and placement components, different tests can be performed on multiple different roadbeds or the same roadbed, such as the required combinations for heat resistance and permeability tests, or compressive strength and permeability tests. The structure is reasonable, facilitating comprehensive and rapid testing, and enabling various combinations of tests, greatly improving the comprehensiveness of the testing.

[0021] The present invention also has the following beneficial effects:

[0022] 1. In this invention, by setting up a driving mechanism, several sets of detection components and several sets of placement components can be separated and combined, thereby enabling testing of multiple small roadbeds or a whole large roadbed. The moving plates on both sides can achieve lateral retraction through the central rod, two external threads set at the ends of the central rod that are mirror images of each other, and the motor. The mounting base, hydraulic cylinder, and positioning parts facilitate longitudinal retraction, thereby realizing expansion and contraction, greatly improving the flexibility of use during testing.

[0023] 2. In this invention, the placement component and the pressurization component are designed to facilitate the placement of the roadbed. When a large roadbed needs to be placed, the vertical rod can be disassembled directly. Through the cooperation of piston plate one, piston plate two, sleeve, pressure relief valve two and pressurization pump, it is easy to quickly pressurize the inside of the detection tube, thereby increasing the permeation pressure of the water and improving the detection efficiency and intensity. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the right-angle baffle structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the sliding frame structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the power plate structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the sliding ring structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the sleeve structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the placement plate structure of the present invention.

[0032] In the diagram: 1. Support base; 2. Support side frame; 3. Detection tube; 4. Placement component; 5. Drive mechanism; 6. Right-angle baffle; 7. Lifting mechanism; 8. Drive source mounting bracket; 9. Mounting plate; 10. Center rod; 11. Moving plate; 13. Sliding frame; 14. Mounting seat; 15. Positioning component; 16. Connecting pipe; 17. Pressure relief valve one; 18. Booster pump; 19. Guide rod; 20. Connecting frame; 21. Slide plate; 22. Moving support plate; 23. Power box; 24. Power plate; 25. Side plate; 26. Booster component; 27. Fixed rod; 28. Sliding ring; 29. ​​Cylinder; 30. Piston plate one; 31. Piston plate two; 32. Sleeve; 33. Pressure relief valve two; 34. Placement plate; 35. Moving base plate; 36. Slide rod; 37. Vertical rod; 38. Guide rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0034] Reference Figures 1-7 A test device for a model of saline soil subgrade under different working conditions includes a support base 1, two support side frames 2 fixedly connected to the top two sides of the support base 1, and two drive mechanisms 5 that are mirror images of each other and set on the top of the support base 1.

[0035] Both sides of the two drive mechanisms 5 are detachably connected to the side wall of the adjacent support side frame 2. Several sets of detection components are provided at the top between the two drive mechanisms 5, and several sets of placement components 4 are provided at the bottom between them.

[0036] The detection assembly includes a detection tube 3, a lifting mechanism 7 is provided at the top of the detection tube 3, a pressurizing component 26 that cooperates with the inside of the detection tube 3 is provided at the top of the detection tube 3, a sealing ring that contacts the roadbed surface is fixedly connected at the bottom edge of the detection tube 3, a connecting pipe 16 and a pressure relief valve 17 are connected to one side of the detection tube 3, and several electric heating tubes are installed inside the tube wall of the detection tube 3.

[0037] As can be seen from the above embodiments: by setting up the support base 1, support side frame 2, drive mechanism 5, detection component, placement component 4 and detection tube 3, the roadbed is placed on top of the placement component 4. The lifting mechanism 7 drives one end of the detection tube 3 to move until the sealing ring is in close contact with the surface of the roadbed. Water is injected into the detection tube 3 through the connecting pipe 16, the water is heated by the electric heating tube, and the water is pressurized by the pressurization component 26. This allows for simultaneous testing of the roadbed's compressive strength, heat resistance, and permeability. Furthermore, by setting up several sets of detection components and several sets of placement components 4, different aspects of testing can be performed on multiple different roadbeds or the same roadbed, such as the required combinations for heat resistance and permeability testing or compressive strength and permeability testing. The structure is reasonable, facilitates comprehensive and rapid testing, and allows for various combinations of testing, greatly improving the comprehensiveness of the test. Example 2

[0038] Reference Figures 1-7The drive mechanism 5 includes two sliding frames 13 connected to the side walls of the two side support frames 2 respectively, and three horizontally arranged moving plates 11 in a linear array along the horizontal direction of the support frames 2. The two ends of the middle moving plate 11 are fixedly connected to the side walls of the sliding frames 13, and the two ends of the two side moving plates 11 are slidably connected to the side walls of the adjacent sliding frames 13. A center rod 10 is provided at the center of one side of each moving plate 11. The two ends of the center rod 10 are rotatably connected to mounting plates 9 connected to the side walls of the moving plate 11. The outer rings of the two ends of the center rod 10 are provided with external threads, and the two external threads are mirror images of each other. A drive source mounting bracket 8 is fixedly connected to one side of the mounting plate 9. A motor is fixedly connected to the inside of the drive source mounting bracket 8 with bolts. The output shaft of the motor passes through the mounting plate 9 through a bushing and is connected to one end of the center rod 10 for transmission. A mounting seat 14 is connected to the center of one side of the middle moving plate 11. The two ends of the mounting seat 14 are provided with mounting grooves. A hydraulic cylinder is installed inside the two mounting grooves. The output end of the hydraulic cylinder is connected to the adjacent moving plate 11. The positioning component 15 is fixedly connected to the side wall bolts. Each movable plate 11 has three movable slots on its top. The detection assembly includes three sets, and each set of detection assemblies includes three detection tubes 3. The lifting mechanism 7 includes a connecting frame 20 that is detachably connected to the outer ring of the detection tubes 3 and a power plate 24 set on the top of the connecting frame 20. The top of the power plate 24 is connected to two sliding plates 21 that are slidably connected to the movable slots. The top of the two sliding plates 21 is connected by a crossbar. The center of the top of the crossbar is connected to a component that is compatible with the sliding slot. A sliding rod is slidably connected and passes through a sliding groove. One end of the sliding rod is connected to a movable support plate 22 that is threadedly connected to the external thread of the central rod 10. A power box 23 is installed at the top center of the power plate 24. The output end of the power box 23 passes through the power plate 24 through a sliding sleeve and is connected to the top of the connecting frame 20. Side plates 25 are fixedly connected to the bottom of both sides of the connecting frame 20. A guide rod 19 is vertically installed at the top of the side plate 25, with one end passing through the side plate 25 through a sliding sleeve. The top end of the guide rod 19 is connected to the side wall of the power plate 24.

[0039] As can be seen from the above embodiments: by setting up the support base 1, support side frame 2, drive mechanism 5, detection component, placement component 4, and detection tube 3, the roadbed is placed on top of the placement component 4. The lifting mechanism 7 moves one end of the detection tube 3 until the sealing ring contacts and adheres tightly to the surface of the roadbed. Water is injected into the detection tube 3 through the connecting pipe 16, the water is heated by the electric heating tube, and the water is pressurized by the pressurization component 26. This allows for simultaneous testing of the roadbed's compressive strength, heat resistance, and permeability. Furthermore, by setting up several sets of detection components and several sets of placement components 4, it is possible to perform different tests on multiple different roadbeds or the same roadbed, such as heat resistance and permeability. Or, the combination required for pressure resistance and permeability testing, etc., has a reasonable structure, which facilitates comprehensive and rapid testing, and allows for testing in multiple combinations, greatly improving the comprehensiveness of the test. Through the setting of the drive mechanism 5, several sets of detection components and several sets of placement components 4 can be separated and combined, thereby enabling testing of multiple small roadbeds or a whole large roadbed. The movable plates 11 on both sides can achieve lateral retraction through the central rod 10, two external threads set at both ends of the central rod 10 that are mirror images of each other, and the setting of the motor. Through the setting of the mounting base 14, the hydraulic cylinder and the positioning part 15, longitudinal retraction is facilitated, thereby realizing the expansion and contraction operation, greatly improving the flexibility of use during testing. Example 3

[0040] Reference Figures 1-7The placement assembly 4 comprises three sets, each set containing three placement plates 34. Each placement plate 34 has a sliding rod 36 fixedly connected to both sides of its bottom via a sliding groove. At the center of the bottom of each placement plate 34, a sliding base plate 35 is connected via a sliding rod that is threaded to the center rod 10. An annular groove is formed at the top of each placement plate 34. Four vertical rods 37 are arranged in a circular array along the circumference of the annular groove at the top of each placement plate 34. An inclined guide rod 38 is fixedly connected to the top of each vertical rod 37. A sliding ring 28 is slidably connected to the outer ring of the detection tube 3. A right-angle baffle 6 is provided on one side of the sliding ring 28. One side of the right-angle baffle 6 is connected to the outer ring of the sliding ring 28 via several fixed rods 27. A cylinder 29 is connected to the top of the outer ring of the detection tube 3 via a mounting bracket. The output end of the cylinder 29 is connected to the outer ring of the sliding ring 28. The pressurization assembly 26 includes a top plate that is bolted to the top end of the detection tube 3 and a sleeve 32 that is fixedly connected to the bottom center of the top plate. A piston plate 31 is slidably connected inside the sleeve 32. A round rod with one end passing through the sleeve 32 via a sealing sleeve is fixedly connected to the bottom center of the piston plate 31. A piston plate 30 that is adapted to the inner ring of the detection tube 3 is connected to the bottom end of the round rod. A pressure relief valve 33 is installed on one side of the top of the top cover. The input end of the pressure relief valve 33 is connected to one side of the sleeve 32 via a pipe. A booster pump 18 is installed on one side of the detection tube 3. The output end of the booster pump 18 is connected to the top end of the sleeve 32 via a pipe through the top plate.

[0041] As can be seen from the above embodiments: by setting up the support base 1, support side frame 2, drive mechanism 5, detection component, placement component 4, and detection tube 3, the roadbed is placed on top of the placement component 4. The lifting mechanism 7 drives one end of the detection tube 3 to move until the sealing ring contacts and adheres tightly to the surface of the roadbed. Water is injected into the detection tube 3 through the connecting pipe 16, the water is heated by the electric heating tube, and the water is pressurized by the pressurization component 26. This allows for simultaneous testing of the roadbed's compressive strength, heat resistance, and permeability. Furthermore, by setting up several sets of detection components and several sets of placement components 4, different aspects of testing can be performed on multiple different roadbeds or the same roadbed, such as the required combinations for heat resistance and permeability testing, or compressive strength and permeability testing. The structure is reasonable, facilitating comprehensive and rapid testing, and allowing for various combinations of testing, greatly improving the comprehensiveness of the test. The drive mechanism 5 further enhances the testing capabilities. This allows for the separation and combination of several sets of detection components and several sets of placement components 4, enabling testing of multiple small roadbeds or a single large roadbed. The movable plates 11 on both sides, via the central rod 10, two external threads mirrored at both ends of the central rod 10, and the motor, can achieve lateral retraction. The mounting base 14, hydraulic cylinder, and positioning component 15 facilitate longitudinal retraction, thus enabling expansion and contraction operations and greatly improving the flexibility of use during testing. The placement components 4 and the pressurization component 26, along with the cooperation of the vertical rod 37 and the guide rod 38, facilitate the placement of the roadbed. When placing a large roadbed, the vertical rod 37 can be directly disassembled. The cooperation of piston plate 1 30, piston plate 2 31, sleeve 32, pressure relief valve 2 33, and pressurization pump 18 facilitates rapid pressurization into the detection tube 3, thereby increasing the permeation pressure of the water and improving the efficiency and intensity of the detection.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A model test device for saline soil subgrade under different working conditions, characterized in that, include: Support base (1), two support side frames (2) fixedly connected to the top of the support base (1) on both sides, and two drive mechanisms (5) mirrored each other set on the top of the support base (1). Both sides of the two drive mechanisms (5) are detachably connected to the side wall of the adjacent support side frame (2). Several sets of detection components are provided at the top between the two drive mechanisms (5), and several sets of placement components (4) are provided at the bottom between them. The detection assembly includes a detection tube (3), a lifting mechanism (7) is provided at the top of the detection tube (3), a pressure boosting component (26) that cooperates with the inside of the detection tube (3) is provided at the top of the detection tube (3), a sealing ring that contacts the roadbed surface is fixedly connected at the bottom edge of the detection tube (3), a connecting pipe (16) and a pressure relief valve (17) are connected to one side of the detection tube (3), and several electric heating tubes are installed inside the tube wall of the detection tube (3). The drive mechanism (5) includes two sliding frames (13) that are respectively connected to the side walls of the support side frames (2) on both sides and three moving plates (11) that are horizontal and linearly arranged along the horizontal direction of the support side frames (2). The two ends of the middle moving plate (11) are fixedly connected to the side wall of the sliding frame (13), and the two ends of the moving plates (11) on both sides are slidably connected to the side wall of the adjacent sliding frame (13). A central rod (10) is provided at the center of one side of each of the movable plates (11). Both ends of the central rod (10) are rotatably connected to mounting plates (9) that are connected to the side wall of the movable plate (11). Both ends of the central rod (10) are provided with external threads, and the two external threads are mirror images of each other. A drive source mounting bracket (8) is fixedly connected to one side of the mounting plate (9) on one side. A motor is fixedly connected to the inside of the drive source mounting bracket (8) by bolts. The output shaft of the motor passes through the mounting plate (9) and is connected to one end of the center rod (10) via a bushing. A mounting seat (14) is connected to the center of one side of the moving plate (11) in the middle. Both ends of the mounting seat (14) are provided with mounting grooves. A hydraulic cylinder is installed inside the two mounting grooves. The output end of the hydraulic cylinder is connected to a positioning part (15) that is fixedly connected to the side wall of the adjacent moving plate (11) by bolts. Three moving grooves are provided on the top of each moving plate (11).

2. The model test device for saline soil subgrade under different working conditions according to claim 1, characterized in that, The detection assembly comprises three sets, each set of which contains three detection tubes (3). The lifting mechanism (7) includes a connecting frame (20) detachably connected to the outer ring of the detection tube (3) and a power plate (24) set on the top of the connecting frame (20). The top of the power plate (24) is connected to two sliding plates (21) that are slidably connected to the moving groove. The top of the two sliding plates (21) is connected by a crossbar. The center of the top of the crossbar is connected to a sliding rod that is adapted to slide through the sliding groove. One end of the sliding rod is connected to a moving support plate (22) that is threadedly connected to the external thread of the center rod (10).

3. The model test device for saline soil subgrade under different working conditions according to claim 2, characterized in that, A power box (23) is installed at the top center of the power plate (24). The output end of the power box (23) is connected to the top of the connecting frame (20) through the power plate (24) via a sliding sleeve. Side plates (25) are fixedly connected to the bottom of both sides of the connecting frame (20). A guide rod (19) with one end passing through the side plate (25) via a sliding sleeve is vertically arranged at the top of the side plate (25). The top end of the guide rod (19) is connected to the side wall of the power plate (24).

4. The model test device for saline soil subgrade under different working conditions according to claim 1, characterized in that, The placement assembly (4) comprises three sets, each set of placement assembly (4) comprises three placement plates (34). The bottom sides of each placement plate (34) are fixedly connected to sliding rods (36) that are slidably connected to the moving groove. At the bottom center of the placement plate (34), a movable base plate (35) is connected to the moving rod that is slidably connected to the moving groove and is threadedly connected to the external thread of the center rod (10).

5. The model test device for saline soil subgrade under different working conditions according to claim 4, characterized in that, The top of the placement plate (34) is provided with an annular groove, and four vertical rods (37) are arranged in a ring along the circumference of the annular groove on the top of the placement plate (34). Each vertical rod (37) is fixedly connected to an inclined guide rod (38) at its top end.

6. The model test device for saline soil subgrade under different working conditions according to claim 2, characterized in that, The outer ring of the detection tube (3) is slidably connected to a sliding ring (28). A right-angle baffle (6) is provided on one side of the sliding ring (28). One side of the right-angle baffle (6) is connected to the outer ring of the sliding ring (28) through several fixing rods (27). A cylinder (29) is connected to the top of the outer ring of the detection tube (3) through a mounting bracket. The output end of the cylinder (29) is connected to the outer ring of the sliding ring (28).

7. The model test device for saline soil subgrade under different working conditions according to claim 1, characterized in that, The pressurization assembly (26) includes a top plate bolted to the top of the detection tube (3) and a sleeve (32) fixedly connected to the bottom center of the top plate. A piston plate (31) is slidably connected inside the sleeve (32). A round rod with one end passing through the sleeve (32) through a sealing sleeve is fixedly connected to the bottom center of the piston plate (31). A piston plate (30) adapted to the inner ring of the detection tube (3) is connected to the bottom end of the round rod. A pressure relief valve (33) is installed on one side of the top of the top cover. The input end of the pressure relief valve (33) is connected to one side of the sleeve (32) through a pipe body. A booster pump (18) is installed on one side of the detection tube (3). The output end of the booster pump (18) is connected to the top of the sleeve (32) through a pipe body through the top plate.

Images