CN116026711B - Asphalt pavement shearing fatigue degree detection equipment - Google Patents
Asphalt pavement shearing fatigue degree detection equipment Download PDFInfo
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- CN116026711B CN116026711B CN202310329302.2A CN202310329302A CN116026711B CN 116026711 B CN116026711 B CN 116026711B CN 202310329302 A CN202310329302 A CN 202310329302A CN 116026711 B CN116026711 B CN 116026711B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention discloses a shearing fatigue degree detection device for an asphalt pavement, which relates to the field of asphalt pavements and comprises a supporting frame and supporting columns, wherein a top plate is arranged at the top end of the first supporting frame, the supporting columns are arranged at one side of the bottom end of the top plate, two supporting columns are arranged, supporting plates are arranged at the top ends of the two supporting columns, through grooves are formed in the middle of the supporting plates, and a space between the two supporting columns is divided into two working areas by a separation plate, so that comparison experiments on asphalt by two groups of heating components are facilitated. The both sides of division board all are provided with heating element, and two heating element all include two heating plates, and two heating plates set up in opposite directions, and the heating mouth of two heating plates sets up relatively promptly, and convenient heating treatment is done to pitch between two heating plates, because asphalt pavement makes in some cases under exposing the sun, need simulate the influence of high temperature weather to pitch, and asphalt pavement's shearing force under the high temperature weather is different with the low temperature.
Description
Technical Field
The invention relates to the field of asphalt pavement, in particular to asphalt pavement shearing fatigue degree detection equipment.
Background
When the asphalt pavement is additionally paved on the concrete surface of the cement road, because the old cement concrete pavement joint (or crack) exists, under the action of running load, the old cement board generates deflection and deflection difference at the joint (or crack), so that the asphalt concrete pavement on the joint (or crack) is subjected to larger shearing stress, and under the action of repeated running load, the asphalt concrete pavement is subjected to shearing fatigue damage and cracks, namely reflection cracks, so that the asphalt concrete pavement has larger shearing fatigue life and is very important for preventing and delaying the generation of the reflection cracks.
Some asphalt pavement shearing fatigue degree detection devices in the current market have the following defects that real-time comparison experiments cannot be carried out, shearing forces between flat roads and between slopes are different, asphalt shearing fatigue under high-temperature weather and normal-temperature weather is different, asphalt concrete on joints (or cracks) is difficult to simulate, and most detection devices only detect on a plane, so that real environments are difficult to simulate.
Therefore, it is necessary to provide an asphalt pavement shearing fatigue degree detecting apparatus to solve the above problems.
Disclosure of Invention
The invention aims to provide an asphalt pavement shearing fatigue degree detection device for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an asphalt pavement shearing fatigue degree detection equipment, includes support frame and support column, the top of support frame is provided with the roof, the support column sets up in one side of roof bottom, the support column is provided with two, and the top of two support columns is provided with the backup pad, logical groove has been seted up at the middle part of backup pad, and the bottom of two support columns is provided with the fixed plate, the bottom of fixed plate is provided with the support base, the middle part at fixed plate top is provided with the division board, the both sides of division board all are provided with heating element, and two heating element all include two heating plates, and two heating plates set up in opposite directions, and one of them heating plate is connected in the inboard of support column, and another one heating plate is connected in the side of division board, is provided with the bottom post between two heating plates, the bottom of bottom post is seted up flutedly, rotates in the recess and is provided with the gyro wheel, the top of roof is provided with the pneumatic cylinder, the bottom of pneumatic cylinder is provided with stretches out the end, stretches out the end and passes through the logical groove, and is connected with the clamp plate, and the top post of two bottoms is connected in the both sides of clamp plate bottom respectively, and one side that one of them support column is close to the support base is provided with the connecting plate, one side of connecting plate is provided with measures protection device, it includes carriage, bottom block, slide bar and auxiliary handle to measure protection device, the inside rotation of carriage is provided with the threaded rod, auxiliary handle sets up in the one end of threaded rod, the bottom block is provided with two, and two bottom blocks set up respectively in the both sides of carriage bottom, the slide bar sets up between two bottom blocks, slide on the threaded rod is provided with first slider, one side of first slider is provided with the second slider, second slider screw-thread fit is on the threaded rod, one side of second slider is connected with first longeron, one side of first slider is connected with the second longeron, the bottom of second longeron is provided with the circle cover, the bottom of first longeron is connected with the movable rod, the one end of movable rod slides and sets up in the circle cover, the bottom of connecting plate is provided with the fixed column, the one end of fixed column is connected with outer arc board, the spout has been seted up to one side that outer arc board is close to the division board, and the slip is provided with the protection arc board in the spout, the top of protection arc board is provided with the connecting rod, the top of connecting rod is connected in the outer lane of movable rod.
Preferably, the bottom of two gyro wheels all is provided with places the board, places the board and is close to the bottom that supports base one side and is provided with electric putter, places the board and keeps away from the bottom that supports base one side and be provided with the rotating block, and the through-hole has been seted up to the both sides of rotating block, and the through-hole internal rotation is connected with the pivot, and the both ends of pivot are provided with the axle fixer, and the axle fixer sets up in the top of placing the board.
Preferably, two I-shaped frames are arranged at the top end of one of the placing plates along the length direction, and a Y-shaped asphalt box is arranged between the two I-shaped frames.
Preferably, a cushion block is arranged at the top end of the isolation plate.
Preferably, the border on the top of board is placed to the another one is provided with the air pump, and one side of air pump is provided with multiunit pneumatic push rod, and pneumatic push rod sets up in the top of placing the board, one side that the air pump is close to pneumatic push rod is connected with a plurality of trachea, multiunit pneumatic push rod is connected through trachea and air pump, and pneumatic push rod's top is provided with the baffle.
The invention has the technical effects and advantages that:
1. in actual operation, the space between two support columns is divided into two working areas by the isolation plate, so that the two groups of heating components can conveniently carry out a comparison experiment on asphalt. The both sides of division board all are provided with heating element, and two heating element all include two heating plates, and two heating plates set up in opposite directions, and the heating mouth of two heating plates sets up relatively promptly, and convenient heating treatment is done to pitch between two heating plates, because asphalt pavement can expose under the sun sometimes, need simulate the influence of high temperature weather to pitch, and asphalt pavement's shearing force under the high temperature weather is different with the low temperature.
2. Because bituminous paving has uphill and downhill, the shearing force and the plane that uphill road and downhill produced also can produce the difference, also need do the contrast experiment, therefore place the electric putter start of board bottom one side, can drive one side of placing the board and carry out the tilt up, because the opposite side of placing the board bottom is provided with the rotor, consequently at the in-process of tilt up, can make the rotor rotate in the pivot, form the inclined plane, simulate the slope face, place two I-shaped frames that the board top set up along length direction in addition and also can produce the gradient.
The bearing device on the other placing plate is different from the common I-shaped frame, the common I-shaped frame can only bear the simulation material at the top end at a fixed angle, and the other bearing device inflates different pneumatic push rods through an air pump, so that the different pneumatic push rods rise to different heights, the fall is generated among a plurality of groups of pneumatic push rods, the cambered surface effect can be generated, and the radian pavement is simulated for shear measurement.
3. According to the invention, the auxiliary handle rotates manually, the threaded rod can be rotated to drive the second sliding block in threaded fit to move, and the second long plate is arranged at the bottom end of the second sliding block, so that the moving rod at the bottom end of the second long plate can be driven to move in the round sleeve, the distance generated between the first sliding block and the second sliding block can be used for measuring the width of the roller, and the influence of different contact areas on the asphalt pavement is simulated.
4. In order to prevent the situation that the pressure is too large and the pavement is cracked and sputtered, the invention has an influence on workers, when the width time of the roller is measured, the movable rod drives the protective arc plate to slide in the sliding groove in the outer arc plate to shield a working area when moving, the workers are protected, in addition, the protective arc plate and the outer arc plate are both transparent plates, the workers can check the shearing force detection situation in real time, two I-shaped frames are arranged at the top end of the plate along the length direction, a Y-shaped asphalt box is arranged between the two I-shaped frames, the shell of the Y-shaped asphalt box can be made of cement, asphalt is put in the shell, and the asphalt shearing force environment between gaps of the cement road is simulated. In addition, the poured simulation materials can be directly placed between the I-shaped frames.
Drawings
FIG. 1 is a schematic diagram of the structure of the asphalt pavement shearing fatigue degree detection device.
Fig. 2 is a schematic structural view of a heating plate and a partition plate according to the present invention.
Fig. 3 is an enlarged schematic view of the structure of fig. 1 a according to the present invention.
Fig. 4 is a schematic structural view of the measurement protecting device of the present invention.
FIG. 5 is a schematic diagram of the structure of the I-frame and Y-type asphalt box of the present invention.
Fig. 6 is a schematic structural view of the rotating shaft and the rotating block according to the present invention.
FIG. 7 is a schematic diagram of the structure of the air pump, air pipe and pneumatic push rod of the present invention.
In the figure: 1. a top plate; 2. a support frame; 3. a support column; 4. a support plate; 5. a support base; 6. a fixing plate; 7. a connecting plate; 8. a measurement protection device; 9. a hydraulic cylinder; 10. an extension end; 11. a through groove; 12. a pressing plate; 13. a bottom end post; 14. a roller; 15. a heating plate; 16. a connecting rod; 17. an electric push rod; 18. placing a plate; 19. the I-shaped frame; 20. y-shaped asphalt box; 21. a partition plate; 22. fixing the column; 23. a cushion block; 24. a carriage; 25. an auxiliary handle; 26. a threaded rod; 27. a first slider; 28. a second slider; 29. a bottom block; 30. a slide bar; 31. a first long plate; 32. a second long plate; 33. a moving rod; 34. protecting the arc plate; 35. an outer arc plate; 36. a round sleeve; 37. a rotating shaft; 38. a shaft holder; 39. a rotating block; 40. an air pump; 41. an air pipe; 42. a pneumatic push rod; 43. a partition board.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides asphalt pavement shearing fatigue degree detection equipment as shown in fig. 1-7, which comprises a support frame 2 and support columns 3, wherein a top plate 1 is arranged at the top end of the support frame 2, the support columns 3 are arranged on one side of the bottom end of the top plate 1, the support columns 3 are provided with two support columns 3, support plates 4 are arranged at the top ends of the two support columns 3, through grooves 11 are formed in the middle parts of the support plates 4, a fixing plate 6 is arranged at the bottom ends of the fixing plate 6, a support base 5 is arranged at the middle parts of the top ends of the fixing plate 6, a separation plate 21 is arranged in the middle parts of the top ends of the fixing plate 6, the support base 5 can be used as a support structure of the bottom ends of the fixing plate 6, and the weight of other structures is added at the top ends of the fixing plate 6, so that the bearing capacity can be increased by adding the support base 5.
The space between the two support columns 3 is divided into two working areas by the isolation plate 21, so that the two groups of heating components can conveniently perform a comparison experiment on asphalt.
The both sides of division board 21 all are provided with heating element, and two heating element all include two heating plates 15, and two heating plates 15 set up in opposite directions, and the heating mouth of two heating plates 15 sets up relatively promptly, and convenient heating treatment is done to the pitch between two heating plates 15, because bituminous paving makes the exposure under the sun sometimes, needs the influence of simulation high temperature weather to pitch, and bituminous paving's shearing force under the high temperature weather is different with the low temperature.
One of them heating plate 15 is connected in the inboard of support column 3, another one heating plate 15 is connected in the side of division board 21, be provided with end post 13 between two heating plates 15, the bottom of end post 13 is seted up flutedly, it is provided with gyro wheel 14 to rotate in the recess, the top of roof 1 is provided with pneumatic cylinder 9, the bottom of pneumatic cylinder 9 is provided with stretches out end 10, stretch out end 10 and pass logical groove 11, and be connected with clamp plate 12, the top of two end posts 13 is connected in the both sides of clamp plate 12 bottom respectively, one side that one of them support column 3 is close to support base 5 is provided with connecting plate 7.
In the actual operation of the invention, the hydraulic cylinder 9 needs to simulate the gravity of the vehicle, the hydraulic cylinder 9 is driven to enable the extending end 10 to carry out downward hydraulic pressure, the pressing plate 12 at the bottom end of the extending end 10 can apply force to the two rollers 14 to simulate the pressure generated by the running of the vehicle on the asphalt pavement, and in addition, a single roller or a plurality of rollers 14 in the groove can be arranged according to the requirement.
The bottom of two gyro wheels 14 is provided with places the board 18, places the bottom that the board 18 is close to support base 5 one side and is provided with electric putter 17, places the bottom that the board 18 kept away from support base 5 one side and is provided with the rotating block 39, and the through-hole has been seted up to the both sides of rotating block 39, and the through-hole swivelling joint has pivot 37, and the both ends of pivot 37 are provided with axle fixer 38, and axle fixer 38 sets up in the top of placing the board 18.
Because the bituminous pavement has an ascending slope and a descending slope, the shearing force and the plane generated by the ascending slope and the descending slope can be distinguished, and a comparison experiment is also needed, so that the electric push rod 17 on one side of the bottom end of the placing plate 18 is started to drive one side of the placing plate 18 to incline upwards, and the rotating block 39 is arranged on the other side of the bottom end of the placing plate 18, so that the rotating block 39 can rotate on the rotating shaft 37 in the upward inclination process to form an inclined plane, a slope surface is simulated, and the two I-shaped frames 19 which are arranged on the top end of the placing plate 18 along the length direction can also generate inclination.
The border on the top of another one place the board 18 is provided with air pump 40, and one side of air pump 40 is provided with multiunit pneumatic push rod 42, and pneumatic push rod 42 sets up in the top of placing the board 18, one side that air pump 40 is close to pneumatic push rod 42 is connected with a plurality of trachea 41, and multiunit pneumatic push rod 42 is connected through trachea 41 and air pump 40, and the top of pneumatic push rod 42 is provided with baffle 43.
The cambered surface device is different from the common i-shaped frame 19, the common i-shaped frame 19 can only bear the simulation material at the top end at a fixed angle, and the cambered surface device inflates different pneumatic push rods 42 through an air pump 40, so that the different pneumatic push rods 42 rise to different heights, the fall is generated among a plurality of groups of pneumatic push rods 42, the cambered surface effect can be generated, and the simulation radian road surface is subjected to shearing measurement, as shown in fig. 7.
In addition, a measuring and protecting device 8 is arranged on one side of the connecting plate 7, and the measuring and protecting device 8 comprises a sliding frame 24, a bottom block 29, a sliding rod 30 and an auxiliary handle 25.
The inside rotation of carriage 24 is provided with threaded rod 26, and auxiliary handle 25 sets up in the one end of threaded rod 26, and the backing block 29 is provided with two, and two backing blocks 29 set up respectively in the both sides of carriage 24 bottom, and slide bar 30 sets up between two backing blocks 29.
The threaded rod 26 is provided with a first sliding block 27 in a sliding manner, one side of the first sliding block 27 is provided with a second sliding block 28, the second sliding block 28 is in threaded fit on the threaded rod 26, one side of the second sliding block 28 is connected with a first long plate 31, one side of the first sliding block 27 is connected with a second long plate 32, the bottom end of the second long plate 32 is provided with a round sleeve 36, and the bottom end of the first long plate 31 is connected with a movable rod 33.
In the actual operation of the present invention, since the first slider 27 is slidably disposed on the threaded rod 26, the first slider 27 is provided with a hole larger than the radius of the threaded rod 26, and the first slider 27 is provided with a finger through hole, the first slider 27 can manually slide to adjust the position, so that the first slider 27 is not affected by the rotation of the threaded rod 26.
The auxiliary handle 25 rotates manually, the threaded rod 26 can be made to rotate, the second sliding block 28 in threaded fit is driven to move, and as the bottom end of the second sliding block 28 is provided with the second long plate 32, the moving rod 33 at the bottom end of the second long plate 32 is also driven to move in the round sleeve 36, the distance generated between the first sliding block 27 and the second sliding block 28 can be used for measuring the width of the roller 14, and the influence of different contact areas on the asphalt pavement is simulated.
One end of the movable rod 33 is slidably arranged in the round sleeve 36, the bottom end of the connecting plate 7 is provided with a fixed column 22, one end of the fixed column 22 is connected with an outer arc plate 35, one side of the outer arc plate 35, which is close to the isolation plate 21, is provided with a sliding groove, a protection arc plate 34 is slidably arranged in the sliding groove, the top end of the protection arc plate 34 is provided with a connecting rod 16, and the top end of the connecting rod 16 is connected with the outer ring of the movable rod 33.
In the actual operation of the present invention, in order to prevent the road surface from cracking and sputtering due to excessive pressure, the present invention affects the staff, and when the width time of the roller 14 is measured, the moving rod 33 drives the protection arc plate 34 to slide in the chute in the outer arc plate 35 to shield the working space, thereby protecting the staff, and in addition, the protection arc plate 34 and the outer arc plate 35 are both transparent plates, so that the staff can check the shear force detection condition in real time.
The spacer 21 has a pad 23 provided on the top end thereof, and the pad 23 can alleviate the pressing force of the pressing plate 12.
Two I-shaped frames 19 are arranged at the top end of one placing plate 18 along the length direction, a Y-shaped asphalt box 20 is arranged between the two I-shaped frames 19, the outer shell of the Y-shaped asphalt box 20 can be made of cement, asphalt is placed in the inner shell, and asphalt shearing force environment between gaps of a cement road is simulated. In addition, the poured simulation material can be directly placed between the I-shaped frames 19.
Claims (5)
1. Asphalt pavement shearing fatigue degree detection equipment comprises a support frame (2) and a support column (3), and is characterized in that: the top of support frame (2) is provided with roof (1), support column (3) set up in one side of roof (1) bottom, support column (3) are provided with two, and the top of two support columns (3) is provided with backup pad (4), logical groove (11) have been seted up at the middle part of backup pad (4), and the bottom of two support columns (3) is provided with fixed plate (6), the bottom of fixed plate (6) is provided with supporting base (5), the middle part of fixed plate (6) top is provided with division board (21), the both sides of division board (21) all are provided with heating element, and two heating element all include two heating dish (15), and two heating dish (15) set up in opposite directions, and one of them heating dish (15) are connected in the inboard of support column (3), and another heating dish (15) are connected in the side of division board (21), are provided with end post (13) between two heating dish (15), the bottom of bottom post (13) is provided with the recess, and the recess rotation is provided with gyro wheel (14), the both sides (1), roof (9) are provided with hydraulic pressure jar (10) and stretch out end (10), the top of two bottom end posts (13) is connected in the both sides of clamp plate (12) bottom respectively, and one side that one of them support column (3) is close to supporting base (5) is provided with connecting plate (7), one side of connecting plate (7) is provided with measures protection device (8), measure protection device (8) including carriage (24), bottom block (29), slide bar (30) and auxiliary handle (25), the inside rotation of carriage (24) is provided with threaded rod (26), auxiliary handle (25) set up in the one end of threaded rod (26), bottom block (29) are provided with two, and two bottom blocks (29) set up in the both sides of carriage (24) bottom respectively, slide bar (30) set up between two bottom blocks (29), slide on threaded rod (26) is provided with first slider (27), one side of first slider (27) is provided with second slider (28), second slider (28) screw thread fit is on (26), one side of second slider (28) is connected with first long board (31), first long board (31) are connected with long board (32) bottom (32), one end of the movable rod (33) is arranged in the round sleeve (36) in a sliding mode, a fixed column (22) is arranged at the bottom end of the connecting plate (7), an outer arc plate (35) is connected to one end of the fixed column (22), a sliding groove is formed in one side, close to the isolation plate (21), of the outer arc plate (35), a protection arc plate (34) is arranged in the sliding groove in a sliding mode, a connecting rod (16) is arranged at the top end of the protection arc plate (34), and the top end of the connecting rod (16) is connected to the outer ring of the movable rod (33).
2. The asphalt pavement shearing fatigue detection apparatus according to claim 1, wherein: the bottom of two gyro wheels (14) all is provided with places board (18), and the bottom of placing board (18) and being close to support base (5) one side is provided with electric putter (17), and the bottom of placing board (18) and keeping away from support base (5) one side is provided with rotating block (39), and through-hole has been seted up to the both sides of rotating block (39), and the through-hole internal rotation is connected with pivot (37), and the both ends of pivot (37) are provided with axle fixer (38), and axle fixer (38) set up in the top of placing board (18).
3. The asphalt pavement shearing fatigue detection apparatus according to claim 2, wherein: two I-shaped frames (19) are arranged at the top end of one of the placement plates (18) along the length direction, and a Y-shaped asphalt box (20) is arranged between the two I-shaped frames (19).
4. The asphalt pavement shearing fatigue detection apparatus according to claim 1, wherein: the top end of the isolation plate (21) is provided with a cushion block (23).
5. The asphalt pavement shearing fatigue detection apparatus according to claim 2, wherein: the border on the top of board (18) is placed to the another one is provided with air pump (40), and one side of air pump (40) is provided with multiunit pneumatic push rod (42), and pneumatic push rod (42) set up in the top of placing board (18), one side that air pump (40) are close to pneumatic push rod (42) is connected with a plurality of trachea (41), multiunit pneumatic push rod (42) are connected through trachea (41) and air pump (40), and the top of pneumatic push rod (42) is provided with baffle (43).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310329302.2A CN116026711B (en) | 2023-03-30 | 2023-03-30 | Asphalt pavement shearing fatigue degree detection equipment |
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| CN202310329302.2A CN116026711B (en) | 2023-03-30 | 2023-03-30 | Asphalt pavement shearing fatigue degree detection equipment |
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| CN116026711A CN116026711A (en) | 2023-04-28 |
| CN116026711B true CN116026711B (en) | 2023-06-20 |
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| JP4330639B2 (en) * | 2006-03-29 | 2009-09-16 | 株式会社竹中工務店 | Asphalt pavement removal method, asphalt pavement removal system, electromagnetic induction coil unit, asphalt pavement removal apparatus, and peeling method |
| CN104237028B (en) * | 2014-09-30 | 2016-07-06 | 合肥工业大学 | A kind of pavement structure interlayer shear strength tester |
| CN105784518B (en) * | 2016-04-26 | 2018-10-09 | 长安大学 | A kind of experimental rig and method of evaluation asphalt pavement structural layer anti-rut behavior |
| CN108240965B (en) * | 2017-12-06 | 2020-12-22 | 江西省高速公路投资集团有限责任公司 | Asphalt pavement interlayer bonding strength detection device and detection method thereof |
| CN110593064B (en) * | 2019-09-19 | 2021-07-30 | 长沙理工大学 | Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process |
| CN111257141A (en) * | 2020-02-28 | 2020-06-09 | 广州大学 | Device and method for testing shear fatigue performance of asphalt |
| CN111735689B (en) * | 2020-07-29 | 2022-07-15 | 安徽荣港建筑工程有限公司 | Steel bridge bituminous pavement shearing fatigue degree detection equipment |
| CN112033777B (en) * | 2020-09-07 | 2021-08-24 | 嘉兴德基机械设计有限公司 | Steel bridge asphalt pavement shearing fatigue degree detection device capable of quickly curing and molding sample |
| CN111912703B (en) * | 2020-09-28 | 2022-12-16 | 铁正检测科技有限公司 | Steel bridge bituminous pavement shearing fatigue degree detection equipment |
| CN112540011A (en) * | 2020-11-30 | 2021-03-23 | 西南交通大学 | Asphalt pavement interlayer pressing-shearing coupling shearing equipment |
| CN113252470A (en) * | 2021-04-16 | 2021-08-13 | 同济大学 | Road surface interlaminar shearing scale simulation device |
| CN215218390U (en) * | 2021-04-16 | 2021-12-17 | 同济大学 | Road surface interlaminar shearing scale simulation device |
| CN114795785A (en) * | 2022-05-19 | 2022-07-29 | 杭州正大医疗器械有限公司 | Physical rehabilitation equipment with multiple air bags for inclined vibration physiotherapy couch |
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