Roadbed performance test platform under rainfall and load coupling effect and use method

Abstract

The invention provides a roadbed performance test platform under the rainfall and load coupling effect and a use method, and aims to solve the problem that a roadbed test platform in the prior art cannot perform time-space observation and performance comparison on the same or different roadbed materials under the difference of rainfall and traffic load. Comprising a roadbed simulation mechanism, an operation simulation device, a rainfall simulation mechanism and a crushing device, the operation simulation mechanism is installed on the roadbed simulation mechanism to simulate vehicle operation, the rainfall simulation mechanism is installed above the roadbed simulation mechanism to simulate natural rainfall, and the crushing device is installed above the roadbed simulation mechanism to crush a fan-shaped roadbed after a test is completed. According to the invention, the same or different roadbed materials can be subjected to time-space observation and performance comparison under the difference of rainfall and traffic load, and the roadbed materials subjected to the test can be quickly crushed for repeated test, so that the test period is greatly shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of roadbed performance testing, and in particular relates to a roadbed performance testing platform under the coupling effect of rainfall and load and a use method thereof. Background Art

[0002] Highway transportation plays an important role in the development of the national economy. Due to the combined effects of traffic loads and environmental factors, the roadbed structures cast with different materials have different degrees of damage accumulation during the operation period. In particular, changes in environmental rainfall will cause changes in the moisture content inside the roadbed. As the moisture content increases, the strength and stiffness of the roadbed soil decrease significantly, and additional deformation occurs under the action of traffic loads. The cumulative deformation will continue to increase, and then produce different degrees of diseases such as cracks, uneven settlement, and subsidence. These diseases not only affect the comfort and safety of vehicle driving, reduce the service performance of the road, but also affect the service life of the roadbed structure.

[0003] New materials have been applied in roadbed engineering. The road performance characteristics of roadbeds made of different materials vary significantly. In order to compare the impact of rainfall and traffic load on the road performance of roadbeds, it is necessary to conduct long-term observation and performance comparison of roadbeds cast with the same or different materials under simultaneous and spatial conditions. However, for a long time, due to the lack of a test platform with such research functions, the test roads built in different regions have different traffic loads and environmental rainfall, and the research results are often difficult to compare effectively. That is, the existing roadbed test platform cannot conduct simultaneous and spatial observation and performance comparison of different types of roadbed materials or structures under the difference of traffic load and environmental rainfall; and the traffic load during the test usually uses a roller to simulate vehicle operation, which cannot fully simulate the effect of actual vehicles on the roadbed. In addition, when multiple tests need to be repeated for the accuracy of the test, when one set of tests has been completed, it is difficult to clean the entire roadbed material after the test has been completed. Usually, it is broken into small pieces by hand for cleaning. Cleaning requires additional manpower, material, financial and time resources, which increases the cost. Moreover, manual crushing is time-consuming, labor-intensive and inefficient, which further extends the test cycle and is not conducive to improving work efficiency. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a roadbed performance test platform under the coupling of rainfall and load and a method of use, so as to solve the problem that the roadbed test platform in the prior art cannot conduct simultaneous and spatial observation and performance comparison of the same or different roadbed materials under differences in rainfall and traffic loads.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a roadbed performance test platform under the coupling of rainfall and load, including: a roadbed simulation mechanism, the roadbed simulation mechanism includes a base, an annular roadbed, an annular groove, an annular roadbed, a support base, four columns arranged at equal intervals and fixedly mounted at one end above the support base, and a top plate mounted at the other ends of the four columns, the bottom of the support base is fixedly mounted at the center position above the base, the annular roadbed is fixedly mounted above the base, the annular groove is fixedly mounted in the annular roadbed, the annular roadbed is mounted in the annular groove, the annular groove is composed of a plurality of fan-shaped grooves spliced ​​together, the annular roadbed is composed of a plurality of fan-shaped roadbeds spliced ​​together one by one, a plurality of lanes are arranged on the fan-shaped roadbed, and the central axes of the annular roadbed, the fan-shaped groove and the fan-shaped roadbed are collinear; A running simulation device, the running simulation device comprises a first track toothed disc, a first bearing, a second bearing, a first sector disc, a second sector disc, a first rack, a second rack and a running mechanism, the first sector disc is coaxially fixedly mounted on the outer wall of the first bearing, the second sector disc is coaxially fixedly mounted on the outer wall of the second bearing, the first bearing and the second bearing are both located above the first track toothed disc, the first bearing and the first track toothed disc are both fixedly sleeved on the outer wall of the base, the second bearing is fixedly sleeved on the outer wall of the support seat, the first rack and the second rack are respectively coaxially fixedly mounted above the inner and outer edges of the annular road base with the teeth facing upwards, the central axes of the annular road base, the first track toothed disc, the first bearing, the second bearing, the first rack and the second rack are collinear, and the running mechanism performs circular motion around the first track toothed disc; The operating mechanism includes a first rotating shaft rotatably mounted on the first sector disk, a first track gear coaxially fixedly matched with one end of the first rotating shaft, a first bevel gear coaxially fixedly matched with the other end of the first rotating shaft, an L-shaped bracket, a second rotating shaft rotatably matched with the vertical part of the L-shaped bracket, a second bevel gear coaxially fixedly matched with one end of the second rotating shaft, a plurality of moving wheels coaxially fixedly mounted side by side on the second rotating shaft, two supporting gears symmetrically arranged on both sides of the plurality of moving wheels, an operating driving member driving the first rotating shaft to rotate, and a loading module for adjusting the pressure value of the moving wheel, the first track gear meshes with the first track toothed disc for transmission, the first rotating shaft rotatably matches with the horizontal part of the L-shaped bracket, the first bevel gear meshes with the second bevel gear for transmission and the rotation axes are perpendicular to each other, the two supporting gears are coaxially fixedly matched with the second rotating shaft, and the two supporting gears mesh with the first rack and the second rack respectively for transmission; A rainfall simulation mechanism, wherein the rainfall simulation mechanism controls the amount of rainfall on the fan-shaped roadbed; A crushing device is arranged on the outer wall of the top plate.

[0006] Optionally, the roadbed simulation mechanism further includes a drainage ditch and a rotating map collector, the rotating map collector is installed above the support seat, the drainage ditch is located between the annular groove and the annular roadbed, and the drainage ditch is connected to the outside through a drainage pipe.

[0007] Optionally, the operating mechanism further includes a pressure sensor, and the pressure sensor is mounted on the second rotating shaft.

[0008] Optionally, there are at least two operating mechanisms; The plurality of moving wheels on the running mechanism are arranged at a first spacing and / or a second spacing.

[0009] Optionally, the loading modules have two, and the two loading modules are symmetrically arranged on both sides of the plurality of moving wheels, each of the loading modules comprises a mounting seat, a roller, two first fixed pulleys, a steel wire rope, a U-shaped frame, a second fixed pulley, a fixed frame, and a loading drive assembly for driving the roller to rotate, wherein two rope grooves are provided on the side wall of the roller, the roller is rotatably mounted in the mounting seat, the fixed frame is mounted on a side wall of the roller parallel to the mounting seat, the arc portion of the U-shaped frame is sleeved on the fixed frame to form a movable connection structure, the second fixed pulley is rotatably mounted in the U-shaped frame, the two first fixed pulleys are arranged side by side and rotatably mounted on the second rotating shaft, the roller is located below the first fixed pulley, the central axes of the roller and the second rotating shaft are parallel, the second fixed pulley and the central axes of the roller are perpendicular, and the steel wire rope is wound together on the two first fixed pulleys, the second fixed pulley and the two rope grooves of the roller; The mounting seats on the two loading modules are fixedly mounted above the first sector disk and the second sector disk respectively; The loading drive assembly includes a driving box, a driving telescopic member, a first driving shaft rotatably mounted on the driving box, a second driving shaft rotatably mounted on the driving box, a driving gear coaxially fixedly matched with the first driving shaft, a driving pinion coaxially fixedly matched with the second driving shaft, and a rotating arm vertically and fixedly connected to the first driving shaft. The driving box is fixedly mounted on one side of the mounting seat, the second driving shaft is coaxially fixedly connected to the roller, one end of the driving telescopic member is hinged on the rotating arm, and the other end of the driving telescopic member is hinged on a surface of the driving box parallel to the first driving shaft, and the driving gear is meshed with the driving pinion for transmission.

[0010] Optionally, the crushing device comprises an annular track mechanism and a steering crushing mechanism, and the steering crushing mechanism is installed in the annular track mechanism; The annular rotating mechanism comprises a second track toothed disc, a second track gear, a rotating shaft, a third bearing, a sector frame and a track driving assembly, the sector frame is provided with a receiving groove for receiving the steering crushing mechanism, the sector frame is coaxially fixedly mounted on the outer wall of the third bearing and the receiving groove on the sector frame opens toward the position of the central axis of the third bearing, the rotating shaft is rotatably mounted on the sector frame, the rotating shaft is coaxially fixedly matched with the second track gear, the second track gear and the second track toothed disc are meshed for transmission, the track driving assembly drives the second track gear to perform circular motion around the second track toothed disc, and the central axes of the third bearing, the sector frame and the track toothed disc are collinear; The steering crushing mechanism includes a rotating assembly, a connecting arm assembly, a first support arm, a second support arm, a third support arm, a drill box, a drill bit, and a first telescopic assembly. The rotating assembly is fixedly mounted on the top of the accommodating groove, one end of the connecting arm assembly is hinged to the rotating assembly, one end of the first support arm is hinged to the other end of the connecting arm assembly, a supporting telescopic assembly is provided between the first support arm and the connecting arm assembly, the other end of the first support arm is hinged to the drill box, one end of the second support arm is hinged between the two ends of the first support arm, the other end of the second support arm is hinged to one end of the third support arm, the other end of the third support arm is hinged to the drill box, the output shaft of the drill box controls the rotation of the drill bit, one end of the first telescopic assembly is hinged to the first support arm, and the other end of the first telescopic assembly is hinged between the two ends of the second support arm.

[0011] Optionally, the rotating assembly includes a mounting frame fixedly mounted on the top of the accommodating groove, a worm rotatably mounted on the mounting frame, a turbine meshing with the worm, a T-shaped rotating disk rotatably mounted on the mounting frame, and a rotating driving member driving the worm to rotate, and the vertical portion of the T-shaped rotating disk is coaxially fixedly matched with the turbine; The connecting arm assembly includes a first connecting arm, a second connecting arm, two second telescopic assemblies, and a third telescopic assembly. One end of the first connecting arm is hinged on the horizontal part of the T-shaped rotating disk, the other end of the first connecting arm is hinged to one end of the second connecting arm, the other end of the second connecting arm is hinged to one end of the first support arm, two ends of the second telescopic assembly are respectively hinged on the horizontal part of the T-shaped rotating disk and the first connecting arm, two second telescopic assemblies are arranged on both sides of the first connecting arm, and two ends of the third telescopic assembly are respectively hinged on the first connecting arm and the second connecting arm.

[0012] Optionally, the rainfall simulation mechanism includes a water storage tank, an annular pipe, a plurality of transfer pipes, a first connecting pipe and a spray assembly, the water storage tank is fixedly installed above the top plate, the surface of the annular pipe is fixedly installed at the bottom of the top plate, the annular pipe is composed of a plurality of fan-shaped pipes spliced ​​one by one, one end of the first connecting pipe is connected to the water storage tank, the other end of the first connecting pipe is connected to one end of a plurality of transfer pipes, the number of the fan pipes and the transfer pipes is equal, the other end of one transfer pipe is connected to one fan pipe, the central axis of the transfer pipe, the fan pipe and the fan-shaped roadbed are collinear, a flow control valve is provided in the transfer pipe, and the spray assembly sprays water toward the surface of the fan-shaped roadbed; The flow control valve comprises a ball core arranged in the transfer tube, a rotating rod driving the ball core to rotate, and a flow control driving member driving the rotating rod to rotate, the ball core has a through hole communicating with the transfer tube, and the rotating rod is rotatably mounted on the transfer tube; The rainfall simulation mechanism also includes a plurality of electronic flow meters, the number of the electronic flow meters is equal to the number of the transfer tubes, and one electronic flow meter is serially connected to one of the transfer tubes.

[0013] Optionally, there are multiple spray assemblies, and the multiple spray assemblies together form an annular spray structure. Each of the spray assemblies includes a fan-shaped water spray chamber, a fan-shaped through groove, and a plurality of nozzles. The fan-shaped water spray chamber is connected to the fan-shaped pipe through the fan-shaped through groove, and the plurality of nozzles are connected to the fan-shaped water spray chamber. The water spraying direction of the plurality of nozzles is toward the surface of the fan-shaped roadbed, and the plurality of nozzles are arranged in a fan shape with equal intervals on the fan-shaped water spray chamber.

[0014] A method for using a roadbed performance test platform under the coupling effect of rainfall and load, comprising the following steps: S1: The ring road base is fixedly installed above the base; S2: The fan-shaped card slot is fixedly installed on the ring road base, and a plurality of the fan-shaped card slots are spliced ​​one by one to form the ring card slot; S3: producing a mixture of the required detection materials, using the produced mixture to make the sector-shaped roadbed, burying a plurality of humidity sensors at different depths in the sector-shaped roadbed, installing the sector-shaped roadbed in the annular groove, the sector-shaped roadbed having a plurality of lanes, and splicing a plurality of sector-shaped roadbeds one by one into the annular roadbed; S4: starting the rainfall simulation mechanism to simulate natural rainfall according to the test requirements, and detecting the road performance of the sector-shaped roadbed under rainfall differences; S5: the plurality of operating mechanisms move independently, the distances between all the operating mechanisms are adjusted according to the test requirements, all the operating mechanisms are started to run at the same speed, and the operating mechanisms simulate vehicle operation on the sector-shaped roadbed; S6: Recording the data of the plurality of humidity sensors during the entire test process; S7: crushing the plurality of sector-shaped roadbeds on the annular roadbed by the crushing device, and then cleaning them; S8: Repeat S3-S7 until multiple groups of test data are obtained, and then analyze and process the data.

[0015] As described above, the roadbed performance test platform under the coupled action of rainfall and load and the use method of the present invention have at least the following beneficial effects: 1. The ring roadbed is composed of multiple fan-shaped roadbeds, so that different roadbed mixtures can be observed and their performance compared under simultaneous and spatial conditions during the test, thereby greatly shortening the test cycle.

[0016] 2. The running mechanism makes circular motion around the first track gear disc, which helps to maintain the stability of the running mechanism, reduce the wear of the moving wheel caused by centrifugal force, and extend the service life of the moving wheel. The first rotating shaft is driven by the running drive member to rotate, drive the first bevel gear and the first track gear to rotate, the first bevel gear and the second bevel gear are meshed and driven, and then drive the second rotating shaft to rotate, the first track gear and the two supporting gears respectively make circular motion on the first track gear disc, the first rack and the second rack, so that the running mechanism can continuously simulate the vehicle operation. Several moving wheels are arranged side by side and coaxially, so that the simulated vehicle operation can be closer to the actual road environment, increase the credibility and practicality of the test results, and can also simulate the impact of vehicles running side by side on the roadbed in the actual road environment. The running mechanism has at least two, so that the simulated vehicle operation can be closer to the actual road environment, increase the credibility and practicality of the test results, and can also simulate the impact of the front and rear running vehicles on the roadbed in the actual road environment. The running mechanisms operate independently, so that the spacing between the running mechanisms is adjustable, thereby increasing the impact of the front and rear spacing difference on the roadbed performance during the test.

[0017] 3. The track drive assembly drives the rotating shaft to rotate, and then drives the coaxial track gear to rotate, so that the track gear makes a circular motion around the track toothed disc, and then drives the fan-shaped frame to make a circular motion, so that the steering crushing mechanism can crush the roadbed in different directions in the circumferential direction. The first arm is driven to move by the coordinated cooperation of the rotating assembly and the connecting arm assembly, and the first arm is adjusted to a suitable position. The movement of the second arm is controlled by the telescopic movement of the first telescopic assembly, and the third arm can drive the drilling rig box to move, so that the drill bit can be controlled at multiple angles, thereby achieving efficient crushing of the roadbed. The worm is driven to rotate by the rotating drive member to drive the turbine to rotate, and the rotation of the turbine drives the coaxial fixed T-shaped rotating disk to rotate, and then drives the connecting arm assembly to rotate, so that the connecting arm assembly can move at multiple angles, increase flexibility, and better adapt to the crushing of different angles and positions of the roadbed, expanding the working range.

[0018] 4. Multiple sector pipes are spliced ​​one by one to form a ring pipe, a transfer pipe is connected to a sector pipe, and the flow control valve in each transfer pipe is controlled separately, so that different rainfall or the same rainfall can be controlled under the same space and time conditions, thereby solving the problem that the impact of the same or different rainfall on the road performance of the roadbed cannot be compared under the same space and time conditions. The ring roadbed is composed of multiple sector roadbeds spliced ​​one by one, and multiple sector roadbeds can be cast with the same material mixture or different material mixtures, so that the impact of the same rainfall on the performance of the sector roadbed with different material mixtures can be compared under the same space and time conditions, and the impact of different rainfall on the performance of the sector roadbed with the same material mixture can be compared under the same space and time conditions, which greatly improves the test efficiency and shortens the test cycle, thereby obtaining a large amount of regular data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a three-dimensional structural schematic diagram of a roadbed performance test platform under the coupling effect of rainfall and load according to the present invention; Figure 2 Shown is a schematic diagram of the three-dimensional structure of the operating device of the present invention; Figure 3 Shown is a schematic diagram of the three-dimensional structure of the loading module of the present invention; Figure 4 Shown is an exploded view of the loading drive assembly of the present invention; Figure 5 Shown is a schematic diagram of the three-dimensional structure of the crushing device of the present invention; Figure 6 Shown is an exploded view of the rotating assembly of the present invention; Figure 7 Shown is an exploded view of the rainfall simulation device of the present invention.

[0020] Component number description Roadbed simulation mechanism 1, base 11, annular roadbed 12, annular slot 13, fan-shaped slot 131, annular roadbed 14, fan-shaped roadbed 141, lane 142, support base 15, column 16, top plate 17, rotary map collector 18, drainage ditch 19; Operation simulation device 2, first track toothed disc 21, first bearing 22, second bearing 23, first sector disc 24, second sector disc 25, first rack 26, second rack 27, operation mechanism 28, pressure sensor 29; The first rotating shaft 281, the first track gear 282, the first bevel gear 283, the L-shaped bracket 284, the second rotating shaft 285, the second bevel gear 286, the moving wheel 287, the supporting gear 288, the running driving member 289, the loading module 2810, the mounting seat 28101, the roller 28102, the first fixed pulley 28103, the wire rope 28104, the U-shaped frame 28105, the second fixed pulley 28106, the fixing frame 28107, the loading driving assembly 28108, the rope groove 28109, the driving box 281081, the driving telescopic member 281082, the first driving rotating shaft 281083, the second driving rotating shaft 281084, the driving large gear 281085, the driving small gear 281086, and the rotating arm 281087; Crushing device 3, annular track mechanism 31, steering crushing mechanism 32, second track toothed disc 311, second track gear 312, third bearing 314, fan-shaped frame 315, track driving assembly 316, rotating assembly 321, connecting arm assembly 322, first support arm 323, second support arm 324, third support arm 325, drilling rig box 326, drill bit 327, first telescopic assembly 328, supporting telescopic assembly 329, mounting frame 3211, worm 3212, turbine 3213, T-shaped rotating disk 3214, rotating driving member 3215, first connecting arm 3221, second connecting arm 3222, second telescopic assembly 3223, third telescopic assembly 3224; Rainfall simulation mechanism 4, water storage tank 41, annular tube 42, fan-shaped tube 421, adapter tube 43, first connecting tube 44, spray assembly 45, fan-shaped water spray chamber 451, fan-shaped through groove 452, nozzle 453, flow control valve 46, ball core 461, rotating rod 462, flow control drive 463, electronic flow meter 464. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0023] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0024] In this embodiment, please refer to Figures 1 to 7 The present invention provides a roadbed performance test platform under the coupling effect of rainfall and load, comprising: a roadbed simulation mechanism 1, an operation simulation device 2, a rainfall simulation mechanism 4 and a crushing device 3, wherein the roadbed simulation mechanism 1 comprises a base 11, an annular roadbed 12, an annular groove 13, an annular roadbed 14, a support seat 15, four columns 16 arranged at equal intervals and fixedly mounted at one end above the support seat 15, and a top plate 17 mounted at the other ends of the four columns 16, wherein the bottom of the support seat 15 is fixedly mounted at the center position above the base 11, the annular roadbed 12 is fixedly mounted above the base 11, the annular groove 13 is fixedly mounted in the annular roadbed 12, and the annular roadbed 14 is mounted in the annular groove 13, the annular groove 13 is composed of a plurality of sector-shaped grooves 131 spliced ​​together, the annular roadbed 14 is composed of a plurality of sector-shaped roadbeds 141 spliced ​​together one by one, a plurality of lanes 142 are arranged on the sector-shaped roadbed 141, and the central axes of the annular roadbed base 12, the sector-shaped groove 131 and the sector-shaped roadbed 141 are collinear; the sector-shaped roadbed 141 is made of a mixture, the mixture is mainly composed of soil, stone slabs and blocks, and some are also added with fly ash, slag and civil engineering synthetic materials. Since the mixture is made of different materials, it has different properties. The annular roadbed 14 is composed of a plurality of sector-shaped roadbeds 141 spliced ​​together, so that different roadbed mixtures can be observed and their performances can be compared under simultaneous and spatial conditions during the test, thereby greatly shortening the test period.

[0025] The operation simulation device 2 includes a first track toothed disc 21, a first bearing 22, a second bearing 23, a first sector disc 24, a second sector disc 25, a first rack 26, a second rack 27 and a running mechanism 28, wherein the first sector disc 24 is coaxially fixedly mounted on the outer wall of the first bearing 22, the second sector disc 25 is coaxially fixedly mounted on the outer wall of the second bearing 23, the first bearing 22 and the second bearing 23 are both located above the first track toothed disc 21, the first bearing 22 and the first track toothed disc 21 are both fixedly sleeved on the outer wall of the base 11, and the second bearing 23 is fixedly sleeved on the support seat 15, the first rack 26 and the second rack 27 are coaxially fixedly installed above the inner and outer edges of the annular road base 12 respectively with the teeth facing upward, the central axes of the annular road base 12, the first track toothed disc 21, the first bearing 22, the second bearing 23, the first rack 26 and the second rack 27 are collinear, and the operating mechanism 28 performs a circular motion around the first track toothed disc 21; the circular motion of the operating mechanism 28 around the first track toothed disc 21 helps to maintain the stability of the operating mechanism 28, reduce the wear of the moving wheel 287 caused by centrifugal force, and extend the service life of the moving wheel 287.

[0026] The operating mechanism 28 includes a first rotating shaft 281 rotatably mounted on the first sector disk 24, a first track gear 282 coaxially fixedly matched with one end of the first rotating shaft 281, a first bevel gear 283 coaxially fixedly matched with the other end of the first rotating shaft 281, an L-shaped bracket 284, a second rotating shaft 285 rotatably matched with the vertical part of the L-shaped bracket 284, a second bevel gear 286 coaxially fixedly matched with one end of the second rotating shaft 285, a plurality of moving wheels 287 coaxially fixedly mounted on the second rotating shaft 285 in parallel, two supporting gears 288 symmetrically arranged on both sides of the plurality of moving wheels 287, an operating driving member 289 for driving the first rotating shaft 281 to rotate, and a loading module 2810 for adjusting the pressure value of the moving wheel 287, the first track gear 282 meshes with the first track toothed disk 21 for transmission, the first rotating shaft 281 rotates with the horizontal part of the L-shaped bracket 284 The first bevel gear 283 and the second bevel gear 286 are meshed and transmitted, and the rotation axes are perpendicular to each other. The two support gears 288 are coaxially fixed with the second rotating shaft 285, and the two support gears 288 are respectively meshed and transmitted with the first rack 26 and the second rack 27; the rainfall simulation mechanism 4 controls the rainfall on the sector roadbed 141; the crushing device 3 is arranged on the outer wall of the top plate 17; the operating drive 289 includes a motor, which drives the first rotating shaft 281 to rotate and drive the first bevel gear 283 and the first track gear 282 to rotate through the operating drive 289. The first bevel gear 283 is meshed and transmitted with the second bevel gear 286, and then drives the second rotating shaft 285 to rotate. The first track gear 282 and the two support gears 288 make circular motions on the first track toothed disc 21, the first rack 26 and the second rack 27, respectively, so that the operating mechanism 28 can continuously simulate the operation of the vehicle. Several moving wheels 287 are arranged side by side and coaxially, so that the simulated vehicle operation can be closer to the actual road environment, increasing the credibility and practicality of the test results, and can also simulate the impact of vehicles running side by side on the roadbed in the actual road environment.

[0027] In this embodiment, please refer to Figure 1 The roadbed simulation mechanism 1 also includes a drainage ditch 19 and a rotating map sampler 18. The rotating map sampler 18 is installed above the support seat 15. The settlement of the fan-shaped roadbed 141 can be collected through the rotating map sampler 18. The drainage ditch 19 is located between the annular groove 13 and the annular roadbed seat 12. The drainage ditch 19 is connected to the outside through a drainage pipe, which can effectively prevent water accumulation on the fan-shaped roadbed 141.

[0028] In this embodiment, please refer to Figure 2The operating mechanism 28 further includes a pressure sensor 29, which is mounted on the second rotating shaft 285. The pressure sensor 29 mounted on the second rotating shaft 285 can monitor the pressure value of the loading mechanism on the roadbed in real time.

[0029] In this embodiment, please refer to Figure 2 There are at least two running mechanisms 28; there are at least two running mechanisms 28, so that the simulated vehicle operation can be closer to the actual road environment, increasing the credibility and practicality of the test results, and can also simulate the impact of the front and rear running vehicles on the roadbed in the actual road environment. The running mechanisms 28 operate independently, so that the spacing between the running mechanisms 28 is adjustable, thereby increasing the impact of the front and rear spacing difference on the roadbed performance during the test.

[0030] The plurality of moving wheels 287 on the running mechanism 28 are arranged at a first spacing and / or a second spacing. The first spacing is smaller than the second spacing, and the plurality of moving wheels 287 on the moving mechanism may be arranged at the first spacing or at the second spacing, or may be arranged partially at the first spacing and partially at the second spacing, so that the effects of different spacings on the roadbed can be analyzed during the test.

[0031] In this embodiment, please refer to Figure 3 and Figure 4The loading modules 2810 have two, and the two loading modules 2810 are symmetrically arranged on both sides of the plurality of moving wheels 287. Each loading module 2810 includes a mounting seat 28101, a roller 28102, two first fixed pulleys 28103, a wire rope 28104, a U-shaped frame 28105, a second fixed pulley 28106, a fixed frame 28107, and a loading drive assembly 28108 for driving the roller 28102 to rotate. Two rope grooves 28109 are provided on the side wall of the roller 28102. The roller 28102 is rotatably mounted in the mounting seat 28101, and the fixed frame 28107 is installed between the roller 28102 and the mounting seat. The mounting seat 28101 is mounted on a side wall thereof parallel to the mounting seat 28101, the arc portion of the U-shaped frame 28105 is sleeved on the fixed frame 28107 to form a movable connection structure, the second fixed pulley 28106 is rotatably mounted in the U-shaped frame 28105, the two first fixed pulleys 28103 are arranged side by side and rotatably mounted on the second rotating shaft 285, the roller 28102 is located below the first fixed pulley 28103, the central axis of the roller 28102 and the second rotating shaft 285 are parallel, the central axis of the second fixed pulley 28106 and the roller 28102 are perpendicular, and the steel wire rope 28104 is wound around the two first fixed pulleys 28103 and the second fixed pulley together. The first and second drive shafts 281084 are rotatably mounted on the drive box 281081, and the second drive shaft 281085 is coaxially fixedly matched with the first drive shaft 281083. 4, a driving pinion 281086 coaxially fixedly matched, a rotating arm 281087 vertically and fixedly connected to the first driving shaft 281083, the driving box 281081 is fixedly installed on one side of the mounting base 28101, the second driving shaft 281084 is coaxially fixedly connected to the roller 28102, one end of the driving telescopic member 281082 is hinged on the rotating arm 281087, and the other end of the driving telescopic member 281082 is hinged on a surface of the driving box 281081 parallel to the first driving shaft 281083, and the driving gear 281085 is meshed with the driving pinion 281086 for transmission.

[0032] By simultaneously driving the telescopic drive parts 281082 on the two loading modules 2810 to move upward or downward, the rotating arm 281087 is driven to rotate forward or reverse, and then the driving gear 281085 coaxially fixed on the first driving shaft 281083 is driven to rotate, and the driving gear 281085 and the driving pinion 281086 are driven to mesh and transmit, and then the coaxially fixed second driving shaft 281084 is driven to rotate, and the coaxially fixed roller 28102 is driven to rotate, so that the wire rope 28104 can be tightened and tightened, and the load is balanced when the two sides of the second shaft 285 are stressed at the same time, thereby solving the problem of large differences in repeated test results under the same conditions. The two fixed pulleys can balance the force on the wire rope 28104 and improve the carrying capacity. By driving the gear 281085 and the driving pinion 281086 to mesh and transmit, the transmission process has high precision, good stability and accurate transmission ratio. The driving telescopic member 281082 is a hydraulic rod, one end of which is hinged on the rotating arm 281087, and the other end of which is hinged on the top surface or the bottom surface or one of the two side surfaces of the driving box 281081 which is parallel to the central axis of the first driving shaft 281083. The hydraulic rod has good stability and strong load-bearing capacity when telescoping.

[0033] In this embodiment, please refer to Figure 1 and Figure 5The crushing device 3 includes an annular track mechanism 31 and a steering crushing mechanism 32, wherein the steering crushing mechanism 32 is installed in the annular track mechanism 31; the annular rotating mechanism includes a second track toothed disc 311, a second track gear 312, a rotating shaft, a third bearing 323, a fan-shaped frame 315 and a track driving assembly 316, wherein the fan-shaped frame 315 is provided with a receiving groove for receiving the steering crushing mechanism 32, the fan-shaped frame 315 is coaxially fixedly installed on the outer wall of the third bearing 323 and the receiving groove on the fan-shaped frame 315 is opened. The mouth faces the position of the central axis of the third bearing 323, the rotating shaft is rotatably mounted on the fan-shaped frame 315, the rotating shaft is coaxially fixedly matched with the second track gear 312, the second track gear 312 and the second track toothed disc 311 are meshed for transmission, the track driving component 316 drives the second track gear 312 to make a circular motion around the second track toothed disc 311, the track driving component 316 includes a motor, the central axes of the third bearing 323, the fan-shaped frame 315 and the track toothed disc are in a colinear line; the steering The crushing mechanism 32 includes a rotating assembly 321, a connecting arm assembly 322, a first support arm 323, a second support arm 324, a third support arm 325, a drilling rig box 326, a drill bit 327, and a first telescopic assembly 328. The rotating assembly 321 is fixedly mounted on the top of the accommodating groove, one end of the connecting arm assembly 322 is hinged to the rotating assembly 321, one end of the first support arm 323 is hinged to the other end of the connecting arm assembly 322, a supporting telescopic assembly 329 is provided between the first support arm 323 and the connecting arm assembly 322, and the The other end of the first arm 323 is hinged to the drill box 326, one end of the second arm 324 is hinged between the two ends of the first arm 323, the other end of the second arm 324 is hinged to one end of the third arm 325, the other end of the third arm 325 is hinged to the drill box 326, the output shaft of the drill box 326 controls the rotation of the drill bit 327, one end of the first telescopic component 328 is hinged to the first arm 323, and the other end of the first telescopic component 328 is hinged between the two ends of the second arm 324.

[0034] The track drive assembly 316 drives the rotating shaft to rotate, thereby driving the coaxial second track gear 312 to rotate, so that the second track gear 312 makes a circular motion around the second track toothed disc 311, and then drives the fan-shaped frame 315 to make a circular motion, so that the steering crushing mechanism 32 can crush the roadbed in different directions in the circumferential direction. The first arm 323 is driven to move by the cooperation of the rotating assembly 321 and the connecting arm assembly 322, and the first arm 323 is adjusted to a suitable position. The movement of the second arm 324 is controlled by the telescopic movement of the first telescopic assembly 328, so that the third arm 325 can drive the drilling rig box 326 to move, so that the drill bit 327 can be controlled at multiple angles, thereby achieving efficient crushing of the roadbed.

[0035] In this embodiment, please refer to Figure 5 and Figure 6 The rotating assembly 321 includes a mounting frame 3211 fixedly mounted on the top of the accommodating groove, a worm 3212 rotatably mounted on the mounting frame 3211, a turbine 3213 meshing with the worm 3212, a T-shaped rotating disk 3214 rotatably mounted on the mounting frame 3211, and a rotating driving member 3215 driving the worm 3212 to rotate, wherein the vertical portion of the T-shaped rotating disk 3214 is coaxially fixedly matched with the turbine 3213; the rotating driving member 3215 includes a motor, which drives the worm 3212 to rotate through the rotating driving member 3215 to drive the turbine 3213 to rotate, and the rotation of the turbine 3213 drives the coaxially fixedly matched T-shaped rotating disk 3214 to rotate, thereby driving the connecting arm assembly 322 to rotate, so that the connecting arm assembly 322 can move at multiple angles, thereby increasing flexibility, and can also better adapt to the crushing of different angles and different positions of the roadbed, thereby expanding the working range.

[0036] The connecting arm assembly 322 includes a first connecting arm 3221, a second connecting arm 3222, two second telescopic assemblies 3223, and a third telescopic assembly 3224. One end of the first connecting arm 3221 is hinged on the horizontal part of the T-shaped rotating disk 3214, the other end of the first connecting arm 3221 is hinged to one end of the second connecting arm 3222, the other end of the second connecting arm 3222 is hinged to one end of the first support arm 323, the second telescopic assembly 3223 is a hydraulic rod, and the two ends of the second telescopic assembly 3223 are respectively hinged on the horizontal part of the T-shaped rotating disk 3214 and the first connecting arm 3221, and the two second telescopic assemblies 3223 are arranged on both sides of the first connecting arm 3221. The third telescopic assembly 3224 is a hydraulic rod, and the two ends of the third telescopic assembly 3224 are respectively hinged on the first connecting arm 3221 and the second connecting arm 3222. The first connecting arm 3221 and the second connecting arm 3222 are hinged to each other, which increases the length and degree of freedom of the connecting arm assembly 322, so that it can better adapt to the crushing requirements of different positions of the roadbed. The two second telescopic assemblies 3223 are located on the same plane, so that the first connecting arm 3221 runs more smoothly and the position and swing amplitude of the first connecting arm 3221 can be adjusted more accurately.

[0037] In this embodiment, please refer to Figure 1 and Figure 7The rainfall simulation mechanism 4 includes a water tank 41, an annular pipe 42, a plurality of transfer pipes 43, a first connecting pipe 44 and a spray assembly 45. The water tank 41 is fixedly installed above the top plate 17, and the surface of the annular pipe 42 is fixedly installed at the bottom of the top plate 17. The annular pipe 42 is composed of a plurality of fan-shaped pipes 421 spliced ​​one by one. One end of the first connecting pipe 44 is connected to the water tank 41, and the other end of the first connecting pipe 44 is connected to one end of the plurality of transfer pipes 43. The number of the fan pipes 421 and the transfer pipes 43 is equal. The other end of one transfer pipe 43 is connected to one fan pipe 421. The central axes of the connecting pipe 43, the fan-shaped pipe 421 and the fan-shaped roadbed 141 are in a collinear manner, and can transmit water evenly to ensure the overall transmission effect. A flow control valve 46 is provided in the transfer pipe 43, and the spray assembly 45 sprays water toward the surface of the fan-shaped roadbed 141; a plurality of fan-shaped pipes 421 are spliced ​​one by one to form an annular pipe 42, a transfer pipe 43 is connected to a fan-shaped pipe 421, and the flow control valve 46 in each transfer pipe 43 is controlled separately, so that different rainfall amounts or the same rainfall amounts can be controlled under simultaneous and spatial conditions, thereby solving the problem that the effects of the same or different rainfall amounts on the roadbed performance cannot be compared under simultaneous and spatial conditions. The annular roadbed 14 is composed of multiple sector roadbeds 141 spliced ​​one by one, and multiple sector roadbeds 141 can be cast with the same material mixture or different material mixtures, so that the effect of the same rainfall on the performance of the sector roadbed 141 with different material mixtures can be compared under the same space-time conditions, and the effect of different rainfall on the performance of the sector roadbed 141 with the same material mixture can be compared under the same space-time conditions, which greatly improves the test efficiency and shortens the test cycle, thereby obtaining a large amount of regular data. The sector roadbed 141 and the sector pipe 421 are equal in number and have a one-to-one correspondence in position, which can achieve accurate matching of the rainfall position of the sector pipe 421 and the rainfall receiving position of the sector roadbed 141, thereby improving the test accuracy.

[0038] The flow control valve 46 includes a ball core 461 arranged in the transfer tube 43, a rotating rod 462 that drives the ball core 461 to rotate, and a flow control driving component 463 that drives the rotating rod 462 to rotate. The ball core 461 has a through hole that communicates with the transfer tube 43, and the rotating rod 462 is rotatably installed on the transfer tube 43; the flow driving component includes a motor, which drives the rotating rod 462 to rotate through the flow control driving component 463 to drive the ball core 461 to rotate, so that the opening between the through hole and the transfer tube 43 can be accurately controlled, thereby simulating a specific precipitation amount.

[0039] The rainfall simulation mechanism 4 further includes a plurality of electronic flow meters 464, the number of which is equal to the number of the transfer tubes 43, and one electronic flow meter 464 is serially connected to one transfer tube 43. The current water supply can be accurately detected in real time through the electronic flow meter 464 serially connected to the transfer tube 43, and the control module will receive the feedback signal of the electronic flow meter 464, and then control the opening of the flow control valve 46, so that the rainfall can be controlled, thereby obtaining regular test data.

[0040] In this embodiment, please refer to Figure 7 The spray assembly 45 has multiple components, and the multiple spray assemblies 45 together form an annular spray structure. Each of the spray assemblies 45 includes a fan-shaped water spray chamber 451, a fan-shaped through groove 452, and a plurality of nozzles 453. The fan-shaped water spray chamber 451 is connected to the fan-shaped pipe 421 through the fan-shaped through groove 452. The plurality of nozzles 453 are connected to the fan-shaped water spray chamber 451. The water spraying direction of the plurality of nozzles 453 is toward the surface of the fan-shaped roadbed 141. The plurality of nozzles 453 are arranged in a fan shape with equal intervals on the fan-shaped water spray chamber 451. The fan-shaped water spray chamber 451 is connected to the fan-shaped tube 421 through the fan-shaped through groove 452, so that water flows from the fan-shaped tube 421 into the fan-shaped water spray chamber 451, and then the water is sprayed out through a plurality of nozzles 453, thereby realizing simulated rainfall. The plurality of nozzles 453 are connected to the fan-shaped water spray chamber 451 to realize simultaneous precipitation and uniform precipitation, which is close to the effect of natural precipitation.

[0041] In this embodiment, please refer to Figures 1 to 7 , based on the above-mentioned method for using the roadbed performance test platform under the coupling effect of rainfall and load, the method comprises the following steps: S1: The ring road base 12 is fixedly installed on the base 11; S2: The sector-shaped slot 131 is fixedly installed on the annular road base 12, and a plurality of the sector-shaped slots 131 are spliced ​​one by one to form the annular slot 13; S3: The fan-shaped roadbed 141 is manufactured by producing a mixture of the required test materials. The fan-shaped roadbed 141 can be set as a horizontal roadbed according to the test purpose and requirements, or it can be set as a sloped roadbed to simulate specific terrain conditions. A plurality of humidity sensors are buried at different depths in the fan-shaped roadbed 141. The buried humidity sensors can monitor the humidity changes at different depths, and can also be used to study the relationship between roadbed humidity and other properties. The fan-shaped roadbed 141 is installed in the annular groove 13. The fan-shaped roadbed 141 has a plurality of lanes 142. According to the test requirements, one moving wheel 287 or a plurality of moving wheels 287 can be set on one lane 142. A plurality of fan-shaped roadbeds 141 are spliced ​​one by one into the annular roadbed 14. The material of each fan-shaped roadbed 141 can be the same or different. S4: according to the test requirements, the rainfall simulation mechanism 4 is started to simulate natural rainfall, and the road performance of the sector roadbed 141 under different rainfall amounts is detected. When the materials of the sector roadbed 141 are the same, the rainfall simulation mechanism 4 controls the annular tube 42 composed of a plurality of sector tubes 421 to simulate the influence of different rainfall amounts in the natural environment on the road performance of the sector roadbed 141 of the same material. When the materials of the sector roadbed 141 are different, the rainfall simulation mechanism 4 controls the annular tube 42 composed of a plurality of sector tubes 421 to simulate the influence of the same rainfall amount in the natural environment on the road performance of the sector roadbed 141 of different materials. S5: The plurality of operating mechanisms 28 move independently, and the distances between all the operating mechanisms 28 are adjusted according to the test requirements. The operating mechanisms 28 operate independently, so that the spacing between the operating mechanisms 28 is adjustable, thereby increasing the influence of the front and rear spacing differences on the roadbed performance during the test. All the operating mechanisms 28 are started to run at the same speed, and the operating mechanisms 28 simulate vehicle operation on the sector-shaped roadbed 141; S6: using the rotary map collector 18 to record the changes of the fan-shaped roadbed 141, and using the pressure sensor 29 and the humidity sensor to record the test data of the entire test process; S7: The plurality of sector-shaped roadbeds 141 on the annular roadbed 14 are crushed by the crushing device 3 and then cleaned; S8: Repeat S3-S7 until multiple groups of test data are obtained, and then analyze and process the data.

[0042] In summary, the present invention is composed of a plurality of sector-shaped roadbeds 141 spliced ​​together through the annular roadbed 14, so that different roadbed mixtures can be observed and compared in performance under the conditions of time and space during the test, thereby greatly shortening the test period. The operating mechanism 28 makes a circular motion around the first track toothed disc 21, which helps to maintain the stability of the operating mechanism 28, reduce the wear of the moving wheel 287 caused by centrifugal force, and extend the service life of the moving wheel 287. The first rotating shaft 281 is driven to rotate by the operating drive member 289 to drive the first bevel gear 283 and the first track gear 282 to rotate, and the first bevel gear 283 is meshed with the second bevel gear 286 for transmission, and then drives the second rotating shaft 285 to rotate, and the first track gear 282 and the two support gears 288 respectively make a circular motion on the first track toothed disc 21, the first rack 26 and the second rack 27, so that the operating mechanism 28 can continuously simulate the operation of the vehicle. Several moving wheels 287 are arranged side by side and coaxially, so that the simulated vehicle operation can be closer to the actual road environment, increase the credibility and practicality of the test results, and can also simulate the impact of vehicles running side by side on the roadbed in the actual road environment. There are at least two operating mechanisms 28, so that the simulated vehicle operation can be closer to the actual road environment, increase the credibility and practicality of the test results, and can also simulate the impact of vehicles running front and rear on the roadbed in the actual road environment. The operating mechanisms 28 operate independently, so that the spacing between the operating mechanisms 28 is adjustable, thereby increasing the impact of the front and rear spacing difference on the roadbed performance during the test. The track drive assembly 316 drives the rotating shaft to rotate and then drives the coaxial track gear to rotate, so that the track gear makes a circular motion around the track toothed disc, and then drives the fan-shaped frame 315 to make a circular motion, so that the steering crushing mechanism 32 can crush the roadbed in different directions in the circumferential direction. The first arm 323 is driven to move by the cooperation of the rotating assembly 321 and the connecting arm assembly 322, and the first arm 323 is adjusted to a suitable position. The second arm 324 is controlled to move by the telescopic movement of the first telescopic assembly 328, so that the third arm 325 can drive the drilling rig box 326 to move, so that the drill bit 327 can be controlled at multiple angles, thereby achieving efficient crushing of the roadbed. The worm 3212 is driven to rotate by the rotating driving member 3215 to drive the turbine 3213 to rotate, and the rotation of the turbine 3213 drives the coaxial fixed T-shaped rotating disk 3214 to rotate, and then drives the connecting arm assembly 322 to rotate, so that the connecting arm assembly 322 can move at multiple angles, increase flexibility, and better adapt to the crushing of different angles and different positions of the roadbed, expanding the working range. A plurality of sector tubes 421 are spliced ​​one by one to form an annular tube 42, a transfer tube 43 is connected to a sector tube 421, and the flow control valve 46 in each transfer tube 43 is controlled individually, so that different rainfall amounts or the same rainfall amounts can be controlled under the same space-time conditions, thereby solving the problem of being unable to compare the effects of the same or different rainfall amounts on the road performance of the roadbed under the same space-time conditions.The annular roadbed 14 is composed of a plurality of sector roadbeds 141 spliced ​​one by one, and the plurality of sector roadbeds 141 can be cast with the same material mixture or with different material mixtures, so that the effect of the same rainfall on the performance of the sector roadbeds 141 with different material mixtures can be compared under the conditions of time and space, and the effect of different rainfall on the performance of the sector roadbeds 141 with the same material mixture can be compared under the conditions of time and space, greatly improving the test efficiency, shortening the test cycle, and thus obtaining a large amount of regular data. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A roadbed performance test platform under the coupled action of rainfall and load, comprising: A roadbed simulation mechanism, the roadbed simulation mechanism comprises a base, an annular roadbed, an annular groove, an annular roadbed, a support base, four columns arranged at equal intervals and fixedly mounted at one end above the support base, and a top plate mounted at the other ends of the four columns, the bottom of the support base is fixedly mounted at the center position above the base, the annular roadbed is fixedly mounted above the base, the annular groove is fixedly mounted in the annular roadbed, the annular roadbed is mounted in the annular groove, the annular groove is composed of a plurality of sector-shaped grooves spliced ​​together, the annular roadbed is composed of a plurality of sector-shaped roadbeds spliced ​​together one by one, a plurality of lanes are arranged on the sector-shaped roadbed, and the central axes of the annular roadbed, the sector-shaped groove and the sector-shaped roadbed are collinear; A running simulation device, the running simulation device comprises a first track toothed disc, a first bearing, a second bearing, a first sector disc, a second sector disc, a first rack, a second rack and a running mechanism, the first sector disc is coaxially fixedly mounted on the outer wall of the first bearing, the second sector disc is coaxially fixedly mounted on the outer wall of the second bearing, the first bearing and the second bearing are both located above the first track toothed disc, the first bearing and the first track toothed disc are both fixedly sleeved on the outer wall of the base, the second bearing is fixedly sleeved on the outer wall of the support seat, the first rack and the second rack are respectively coaxially fixedly mounted above the inner and outer edges of the annular road base with the teeth facing upwards, the central axes of the annular road base, the first track toothed disc, the first bearing, the second bearing, the first rack and the second rack are collinear, and the running mechanism performs circular motion around the first track toothed disc; The operating mechanism includes a first rotating shaft rotatably mounted on the first sector disk, a first track gear coaxially fixedly matched with one end of the first rotating shaft, a first bevel gear coaxially fixedly matched with the other end of the first rotating shaft, an L-shaped bracket, a second rotating shaft rotatably matched with the vertical part of the L-shaped bracket, a second bevel gear coaxially fixedly matched with one end of the second rotating shaft, a plurality of moving wheels coaxially fixedly mounted side by side on the second rotating shaft, two supporting gears symmetrically arranged on both sides of the plurality of moving wheels, an operating driving member driving the first rotating shaft to rotate, and a loading module for adjusting the pressure value of the moving wheel, the first track gear meshes with the first track toothed disc for transmission, the first rotating shaft rotatably matches with the horizontal part of the L-shaped bracket, the first bevel gear meshes with the second bevel gear for transmission and the rotation axes are perpendicular to each other, the two supporting gears are coaxially fixedly matched with the second rotating shaft, and the two supporting gears mesh with the first rack and the second rack respectively for transmission; A rainfall simulation mechanism, wherein the rainfall simulation mechanism controls the amount of rainfall on the fan-shaped roadbed; A crushing device is arranged on the outer wall of the top plate.

2. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: The roadbed simulation mechanism also includes a drainage ditch and a rotating plotter, wherein the rotating plotter is installed above the support seat, the drainage ditch is located between the annular groove and the annular roadbed seat, and the drainage ditch is connected to the outside through a drainage pipe.

3. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: The operating mechanism further comprises a pressure sensor, and the pressure sensor is mounted on the second rotating shaft.

4. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: There are at least two operating mechanisms; The plurality of moving wheels on the running mechanism are arranged at a first spacing and / or a second spacing.

5. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: The loading module comprises two, and the two loading modules are symmetrically arranged on both sides of the plurality of moving wheels, and each of the loading modules comprises a mounting seat, a roller, two first fixed pulleys, a steel wire rope, a U-shaped frame, a second fixed pulley, a fixed frame, and a loading drive assembly for driving the roller to rotate. Two rope grooves are provided on the side wall of the roller. The roller is rotatably mounted in the mounting seat, and the fixed frame is mounted on a side wall of the roller parallel to the mounting seat, and the arc portion of the U-shaped frame is sleeved on the fixed frame to form a movable connection structure, and the second fixed pulley is rotatably mounted in the U-shaped frame, and the two first fixed pulleys are side by side and rotatably mounted on the second rotating shaft, and the roller is located below the first fixed pulley, and the central axes of the roller and the second rotating shaft are parallel, and the second fixed pulley and the central axes of the roller are perpendicular, and the steel wire rope is wound together on the two first fixed pulleys, the second fixed pulley and the two rope grooves of the roller; The mounting seats on the two loading modules are fixedly mounted above the first sector disk and the second sector disk respectively; The loading drive assembly includes a driving box, a driving telescopic member, a first driving shaft rotatably mounted on the driving box, a second driving shaft rotatably mounted on the driving box, a driving gear coaxially fixedly matched with the first driving shaft, a driving pinion coaxially fixedly matched with the second driving shaft, and a rotating arm vertically and fixedly connected to the first driving shaft. The driving box is fixedly mounted on one side of the mounting seat, the second driving shaft is coaxially fixedly connected to the roller, one end of the driving telescopic member is hinged on the rotating arm, and the other end of the driving telescopic member is hinged on a surface of the driving box parallel to the first driving shaft, and the driving gear is meshed with the driving pinion for transmission.

6. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: The crushing device comprises an annular track mechanism and a steering crushing mechanism, wherein the steering crushing mechanism is installed in the annular track mechanism; The annular rotating mechanism comprises a second track toothed disc, a second track gear, a rotating shaft, a third bearing, a sector frame and a track driving assembly, the sector frame is provided with a receiving groove for receiving the steering crushing mechanism, the sector frame is coaxially fixedly mounted on the outer wall of the third bearing and the receiving groove on the sector frame opens toward the position of the central axis of the third bearing, the rotating shaft is rotatably mounted on the sector frame, the rotating shaft is coaxially fixedly matched with the second track gear, the second track gear and the second track toothed disc are meshed for transmission, the track driving assembly drives the second track gear to perform circular motion around the second track toothed disc, and the central axes of the third bearing, the sector frame and the track toothed disc are collinear; The steering crushing mechanism includes a rotating assembly, a connecting arm assembly, a first support arm, a second support arm, a third support arm, a drill box, a drill bit, and a first telescopic assembly. The rotating assembly is fixedly mounted on the top of the accommodating groove, one end of the connecting arm assembly is hinged to the rotating assembly, one end of the first support arm is hinged to the other end of the connecting arm assembly, a supporting telescopic assembly is provided between the first support arm and the connecting arm assembly, the other end of the first support arm is hinged to the drill box, one end of the second support arm is hinged between the two ends of the first support arm, the other end of the second support arm is hinged to one end of the third support arm, the other end of the third support arm is hinged to the drill box, the output shaft of the drill box controls the rotation of the drill bit, one end of the first telescopic assembly is hinged to the first support arm, and the other end of the first telescopic assembly is hinged between the two ends of the second support arm.

7. The roadbed performance test platform under the coupled action of rainfall and load according to claim 6 is characterized by: The rotating assembly includes a mounting frame fixedly mounted on the top of the accommodating tank, a worm rotatably mounted on the mounting frame, a turbine meshing with the worm, a T-shaped rotating disk rotatably mounted on the mounting frame, and a rotating driving member driving the worm to rotate, wherein the vertical portion of the T-shaped rotating disk is coaxially fixedly matched with the turbine; The connecting arm assembly includes a first connecting arm, a second connecting arm, two second telescopic assemblies, and a third telescopic assembly. One end of the first connecting arm is hinged on the horizontal part of the T-shaped rotating disk, the other end of the first connecting arm is hinged to one end of the second connecting arm, the other end of the second connecting arm is hinged to one end of the first support arm, two ends of the second telescopic assembly are respectively hinged on the horizontal part of the T-shaped rotating disk and the first connecting arm, two second telescopic assemblies are arranged on both sides of the first connecting arm, and two ends of the third telescopic assembly are respectively hinged on the first connecting arm and the second connecting arm.

8. The roadbed performance test platform under the coupled action of rainfall and load according to claim 1 is characterized by: The rainfall simulation mechanism includes a water storage tank, an annular pipe, a plurality of transfer pipes, a first connecting pipe and a spray assembly. The water storage tank is fixedly installed above the top plate, the surface of the annular pipe is fixedly installed at the bottom of the top plate, the annular pipe is composed of a plurality of fan-shaped pipes spliced ​​one by one, one end of the first connecting pipe is connected to the water storage tank, the other end of the first connecting pipe is connected to one end of a plurality of transfer pipes, the number of the fan pipes and the transfer pipes is equal, the other end of one transfer pipe is connected to one fan pipe, the central axis of the transfer pipe, the fan pipe and the fan-shaped roadbed are collinear, a flow control valve is provided in the transfer pipe, and the spray assembly sprays water toward the surface of the fan-shaped roadbed; The flow control valve comprises a ball core arranged in the transfer tube, a rotating rod driving the ball core to rotate, and a flow control driving member driving the rotating rod to rotate, the ball core has a through hole communicating with the transfer tube, and the rotating rod is rotatably mounted on the transfer tube; The rainfall simulation mechanism also includes a plurality of electronic flow meters, the number of the electronic flow meters is equal to the number of the transfer tubes, and one electronic flow meter is serially connected to one of the transfer tubes.

9. The roadbed performance test platform under the coupled action of rainfall and load according to claim 8 is characterized by: There are multiple spray assemblies, and the multiple spray assemblies together form an annular spray structure. Each of the spray assemblies includes a fan-shaped water spray chamber, a fan-shaped through groove, and a plurality of nozzles. The fan-shaped water spray chamber is connected to the fan-shaped pipe through the fan-shaped through groove, and the plurality of nozzles are connected to the fan-shaped water spray chamber. The water spraying direction of the plurality of nozzles is toward the surface of the fan-shaped roadbed, and the plurality of nozzles are arranged in a fan shape with equal intervals on the fan-shaped water spray chamber.

10. A method for using a roadbed performance test platform under the coupling effect of rainfall and load, characterized in that: The roadbed performance test platform under the coupled action of rainfall and load as claimed in claim 1 comprises the following steps: S1: The ring road base is fixedly installed above the base; S2: The fan-shaped card slot is fixedly installed on the ring road base, and a plurality of the fan-shaped card slots are spliced ​​one by one to form the ring card slot; S3: producing a mixture of the required detection materials, using the produced mixture to make the sector-shaped roadbed, burying a plurality of humidity sensors at different depths in the sector-shaped roadbed, installing the sector-shaped roadbed in the annular groove, the sector-shaped roadbed having a plurality of lanes, and splicing a plurality of sector-shaped roadbeds one by one into the annular roadbed; S4: starting the rainfall simulation mechanism to simulate natural rainfall according to the test requirements, and detecting the road performance of the sector-shaped roadbed under rainfall differences; S5: the plurality of operating mechanisms move independently, the distances between all the operating mechanisms are adjusted according to the test requirements, all the operating mechanisms are started to run at the same speed, and the operating mechanisms simulate vehicle operation on the sector-shaped roadbed; S6: Recording the data of the plurality of humidity sensors during the entire test process; S7: crushing the plurality of sector-shaped roadbeds on the annular roadbed by the crushing device, and then cleaning them; S8: Repeat S3-S7 until multiple groups of test data are obtained, and then analyze and process the data.

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