Device and method for synchronously testing high-temperature stability and drainage performance of porous asphalt pavement

Abstract

The invention discloses a device and a method for synchronously testing high-temperature stability and drainage performance of a porous asphalt pavement. The device is mainly composed of a load simulation system, a drainage system and a temperature control system. The load simulation system applies controllable intermittent repeated load to the test piece through a pressurizing mechanism and a load sensor, and a dynamic creep test is carried out to evaluate the high-temperature stability of the pavement. The drainage system comprises a vertical spray head which is annularly arranged, two water seepage pipes, an annular semi-closed glass wall, an electromagnetic flow sensor and a high-precision scale drainage collection container, and is used for carrying out a variable water head water seepage test through simultaneous load simulation, and evaluating the drainage performance by detecting the seepage flow of a test piece within a set time. The temperature control system is used for accurately controlling the test environment temperature. According to the invention, synchronous testing of high-temperature stability and drainage performance is realized, testing time and labor cost are significantly reduced, interaction of two performances under actual working conditions is simulated, and the testing result has higher engineering guidance value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road engineering material testing, in particular to a porous asphalt pavement high-temperature stability and drainage performance synchronous testing device and method. BACKGROUND

[0002] In road engineering construction, porous asphalt pavement has good drainage performance and skid resistance, effectively improving the safety of driving in the rain, and is widely used in the southern and other regions with high temperature and heavy rain. However, in high-temperature environment, porous asphalt pavement is prone to rutting, deformation and other stability problems, which seriously affects its service life and driving comfort.

[0003] At present, the testing of the high-temperature stability and drainage performance of porous asphalt pavement mostly adopts independent testing methods. For example, rutting test, Marshall stability test and other methods are used to test the high-temperature stability of porous asphalt pavement, and water permeability test is used to test the drainage performance of porous asphalt pavement. This separate testing method has many drawbacks: on the one hand, the testing process is tedious, inefficient, and consumes a lot of time and labor cost; on the other hand, independent testing cannot simulate the interactive influence of the two performances under actual working conditions, resulting in that the test results cannot accurately reflect the performance of porous asphalt pavement in real environment, and it is difficult to provide comprehensive and reliable data support for mix proportion design. Therefore, a porous asphalt pavement high-temperature stability and drainage performance synchronous testing device and method are needed to solve the above problems. SUMMARY

[0004] The present application aims to provide a porous asphalt pavement high-temperature stability and drainage performance synchronous testing device and method, which solves the problems of low efficiency and inability to reflect the interactive influence of performance of the existing testing method through integrated design and synchronous testing technology, realizes synchronous loading, temperature control, deformation monitoring and drainage monitoring of the porous asphalt pavement test piece, provides accurate and comprehensive data basis for porous asphalt pavement mix proportion design, and promotes the optimization and upgrading of porous asphalt pavement technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following scheme: the present application provides a porous asphalt pavement high-temperature stability and drainage performance synchronous testing device, which comprises:

[0006] A load simulation system is arranged on the top wall of the integrated test chamber, the load simulation system comprises a pressurizing mechanism, a pressure controller is fixedly connected outside the integrated test chamber, the pressurizing mechanism is electrically connected with the pressure controller, an annular vertical water spray head is arranged in the integrated test chamber, a load sensor is installed on the pressurizing mechanism, a workbench is arranged in the integrated test chamber, and a loading plate is arranged on the workbench.

[0007] A drainage system comprising two water infiltration pipes, an annular closed glass wall and an electromagnetic flow sensor, the first water infiltration pipe is installed below the electromagnetic flow sensor, the second water infiltration pipe is installed below the annular closed glass wall, the electromagnetic flow sensor is installed on the first water infiltration pipe, a high-precision scale drainage collection container is communicated with the first water infiltration pipe, the high-precision scale drainage collection container and the annular vertical water spray head are communicated through a water suction pipe, and a water suction device is installed on the water suction pipe.

[0008] A temperature control system comprising an annular heating wire, the annular heating wire is installed on the workbench, the annular heating wire is electrically connected with a temperature controller, the temperature controller is connected with a data transmission line, the data transmission line is connected with a temperature control box, a K-type thermocouple is installed in the data transmission line, and the K-type thermocouple is electrically connected with the temperature control box.

[0009] Preferably, the pressurizing mechanism comprises an oil pump and a hydraulic jack, the oil pump is communicated with the pressure controller, the oil pump is fixedly connected to the top wall of the integrated test chamber, the oil pump is communicated with a high-pressure oil pipe, a support is fixedly connected in the integrated test chamber, the hydraulic jack is installed on the support, the hydraulic jack is communicated with the oil pump through the high-pressure oil pipe, and the annular vertical water spray head is installed on the support.

[0010] Preferably, the high-precision scale drainage collection container has a display screen three, a knob one, a switch one and a knob two.

[0011] Preferably, the temperature control box has a display screen one, a switch two, a knob three and a setting button.

[0012] Preferably, the water suction device has a visual water suction window, the electromagnetic flow sensor has a display screen two, and the load sensor has a display screen four.

[0013] Preferably, the pressure controller has a display screen three, a switch three and a loading rate control switch.

[0014] A method for simultaneously testing high-temperature stability and drainage performance of porous asphalt pavement, comprising the following steps:

[0015] Step one: open the chamber door, and wipe the inside of the integrated test chamber, the loading plate, the water infiltration pipe and the workbench with alcohol-soaked dust-free cloth to ensure that the surface is free of oil stains and impurities; at the same time, check the water level in the water suction device to ensure that it is in normal working condition, if the water level is insufficient, add it to the appropriate scale, and confirm that the water suction pipeline is not blocked through the visual water suction window;

[0016] Step two: place the cured test piece stably on the loading plate; use a level to check the levelness of the test piece;

[0017] Step three: After confirming that the loading plate is tightly attached to the upper surface of the test piece, close the cabin door, and real-time feedback data through the load sensor to check the uniformity of the contact pressure; start the pre-water test, adjust the flow of the annular vertical water nozzle to 1 L / min, and continue to water for 1 min, observe the high-precision scale drainage collection container and the water seepage pipe to ensure that there is no leakage phenomenon in the drainage;

[0018] Step four: Set the loading mode, loading rate, and target load or loading displacement upper limit on the pressure controller; input the target temperature, heating rate, and constant temperature time on the temperature control box operation interface, start the temperature preheating program; adjust the flow of the annular vertical water nozzle through the drainage system control knob, turn on the water suction device to keep the water circulation, and set the flow collection interval time of the electromagnetic flow sensor;

[0019] Step five: Start the temperature control system, and the annular heating wire starts to heat up; when the temperature of the test piece center reaches the set value and keeps constant for a period of time, start the load simulation system and the drainage system in turn, in the load simulation system, the hydraulic jack applies intermittent repeated load at the set rate, and the load sensor real-time feedback force value; at the same time, start the drainage system, the water suction device keeps water circulation to transport water to the annular vertical water nozzle to simulate rainfall, the rainfall is evenly distributed on the test piece in the annular semi-enclosed glass wall, and it is ensured that the rainfall will not fall outside the annular semi-enclosed glass wall, the water discharged by the test piece enters the electromagnetic flow sensor through the water seepage pipe under the annular semi-enclosed glass wall, and the data transmitted by the electromagnetic flow sensor is combined with display screen two to real-time calculate and display the drainage rate; during the test, record the data of the pressure controller, temperature control box, and display screen two every 2 min, if abnormal conditions such as the deformation rate of the test piece exceeding the set value, the load sudden drop exceeding 10%, or the temperature exceeding the set value ±2℃ occur, immediately manually trigger the system emergency stop button, the system will automatically execute the unloading, water stopping, and power-off program, and save the real-time data, and issue an audible and visual alarm signal;

[0020] Step Six: When the upper limit of the loading displacement, the target load, or the end of the test is reached, stop the load simulation system, drainage system, and temperature control system in sequence. After the hydraulic jacks have completely unloaded and returned to their original positions, and the temperature of the integrated test chamber has dropped below 40°C, remove the specimen and measure its final deformation with vernier calipers. Mark the location and propagation of cracks, and store the specimen in a drying oven for subsequent analysis. Record the drainage volume in a high-precision graduated drainage collection container for the last 0 seconds before the end of the test. Use compressed air to purge the integrated test chamber, workbench, and loading plate to remove any residual asphalt. Remove asphalt debris; for stubborn stains, wipe with a lint-free cloth soaked in xylene to ensure no asphalt residue remains on the equipment surface; rinse all components of the drainage system three times with clean water, remove residual moisture, and then air dry; drain all remaining water from the water suction device, and clean the suction pipe and the visual suction window; turn off the power to the temperature control box, and after its internal temperature drops to room temperature, wipe the surface dust with a dry cloth; apply anti-rust oil to the surfaces of key components such as the load sensor and electromagnetic flow sensor to prevent oxidation of metal parts; finally, cover the device with a dust cover and store it properly for the next test.

[0021] The present invention discloses the following technical effects:

[0022] 1. The integrated test chamber in this device serves as the test space for the specimen. The pressurizing component can output axial loads to the specimen. The pressure controller adjusts the loading rate in real time, and the load sensor accurately feeds back the force value to ensure stable load application and simulate the load effect of vehicle driving on the road surface.

[0023] 2. In this device, the annular cloth vertical water nozzles simulate natural rainfall, the electromagnetic flow sensor monitors the drainage flow in real time, the high-precision scale drainage collection container directly measures the drainage volume, and the water suction device completes water circulation or waste liquid recovery with the help of the water suction pipe, ensuring that the test process is continuous and saves water, simulating the road drainage scenario.

[0024] 3. In this device, the temperature control box regulates the heating power of the high-temperature resistant nickel-chromium alloy annular heating wire through a data transmission line. Combined with the temperature controller and K-type thermocouple, it achieves precise temperature control within the range of 20-80℃. Moreover, the temperature uniformity error of different positions in the integrated test chamber is ≤1℃, thus reproducing the temperature field of the road surface under high temperature conditions in summer. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1A structure schematic diagram of a porous asphalt pavement performance synchronous testing device;

[0027] Wherein, 1, pressure controller; 2, display screen three; 3, switch three; 4, loading rate control switch; 5, oil pump; 6, hydraulic jack; 7, load sensor; 8, display screen four; 9, temperature control box; 10, display screen one; 11, switch two; 12, knob three; 13, setting button; 14, data transmission line; 15, annular heating wire; 16, annular vertical water spray head; 17, electromagnetic flow sensor; 18, water seepage pipe; 19, display screen two; 20, high-precision scale drainage collection container; 21, display screen three; 22, knob two; 23, switch one; 24, knob one; 25, water absorption device; 26, visual water absorption window; 27, water absorption pipe; 28, temperature controller; 29, K-type thermocouple; 30, integrated test cabin; 31, loading plate; 32, workbench; 33, test piece; 34, annular semi-closed glass wall; 35, water seepage pipe; 36, integrated test cabin door; DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Reference Figure 1 The present application provides a porous asphalt pavement high-temperature stability and drainage performance synchronous testing device, which comprises:

[0031] A load simulation system is arranged on the top wall of the integrated test cabin 30, and the load simulation system comprises a pressurizing mechanism. The integrated test cabin 30 is fixedly connected with a pressure controller 1 outside. The pressurizing mechanism is electrically connected with the pressure controller 1. The integrated test cabin 30 is provided with an annular vertical water spray head 16 inside. The pressurizing mechanism is installed with a load sensor 7. The load sensor 7 is installed with a loading plate 31. The integrated test cabin 30 is provided with a workbench 32. The workbench 32 is provided with the loading plate 31.

[0032] The drainage system comprises a water seepage pipe 18 and an electromagnetic flow sensor 17, the water seepage pipe 18 is installed below the electromagnetic flow sensor 17, a water seepage pipe 35 is installed below the annular semi-closed glass wall 34, the water seepage pipe 18 is provided with the electromagnetic flow sensor 17, the water seepage pipe 18 is communicated with a high-precision scale drainage collection container 20, the high-precision scale drainage collection container 20 and the annular vertical water spray head 16 are communicated through a water suction pipe 27, and the water suction pipe 27 is provided with a water suction device 25;

[0033] The temperature control system comprises an annular heating wire 15, the annular heating wire 15 is installed on a workbench 32, the annular heating wire 15 is electrically connected with a temperature controller 28, the temperature controller 28 is connected with a data transmission line 14, the data transmission line 14 is connected with a temperature control box 9, a K-type thermocouple 29 is installed in the data transmission line 14, and the K-type thermocouple 29 is electrically connected with the temperature control box 9.

[0034] In the device, the integrated test cabin 30 is a semi-closed system with an integrated test cabin door 36, and the purpose is to ensure temperature controllability and test process stability; the pressurizing mechanism in the load simulation system can output an axial load to the test piece, the pressure controller 1 adjusts the loading rate in real time, the load sensor 7 accurately feeds back the force value, and the load is stably applied, so that the load effect of vehicle driving on the pavement is simulated;

[0035] The annular vertical water spray head 16 simulates natural rainfall, the electromagnetic flow sensor 17 monitors the drainage flow in real time and calculates the drainage rate of the test piece in real time in combination with the display screen two, the high-precision scale drainage collection container 20 directly and intuitively observes the drainage amount, the water suction device 25 completes water circulation or waste liquid recovery with the help of the water suction pipe 27, ensures that the test process is continuous and water is saved, and a pavement drainage scene is simulated;

[0036] The temperature control box 9 adjusts the heating power of the annular heating wire 15 made of high-temperature-resistant nickel-chromium alloy through the data transmission line 14, cooperates with the temperature controller 28 and the K-type thermocouple 29, realizes accurate temperature control in the range of 20-80 DEG C, and the temperature uniformity error of different positions of the integrated test cabin is less than or equal to 1 DEG C, so that the temperature field of the pavement under the environment of high temperature in summer is restored;

[0037] The integrated test cabin 1 is made of steel, the load sensor 7 and the loading plate are connected through threads, and a thread locking agent is applied, so that energy loss is reduced.

[0038] Temperature control system integration operation: the annular heating wire 15 made of high-temperature-resistant nickel-chromium alloy is fixed on the workbench in a spiral winding manner, the winding spacing is kept at 5 mm, the outside is wrapped with a 50 mm thick ceramic fiber heat preservation layer to reduce heat loss; the temperature control box 9 connects the annular heating wire 15 and the temperature controller 28 through the data transmission line 14, and the K-type thermocouple 29 is implanted at a reasonable position of the data transmission line, which is used for monitoring the temperature of the integrated test cabin in real time, verifying and ensuring the temperature field uniformity.

[0039] Drainage system installation process: the annular vertical water spray head 16 is fixed by bolts 25mm above the hydraulic jack, the water absorption pipe 27 made of PE material is connected with the high-precision scale drainage collection container 20 to ensure stable water supply; the water seepage pipe 18, the water seepage pipe 35, the electromagnetic flow sensor 17 and the high-precision scale drainage collection container 20 are sequentially connected by silica gel pipe sealing to ensure accurate drainage data monitoring; the annular semi-closed glass wall 34 is made of glass material to avoid water residue on the annular wall, and is installed below the hydraulic jack.

[0040] Further optimization scheme, the pressurizing mechanism includes an oil pump 5 and a hydraulic jack 6, the oil pump 5 is in communication with the pressure controller 1, the oil pump 5 is fixedly connected to the top wall of the integrated test cabin 30, a high-pressure oil pipe is communicated with the oil pump 5, a support is fixedly connected in the integrated test cabin 30, the hydraulic jack 6 is installed on the support, the hydraulic jack 6 is in communication with the oil pump 5 through the high-pressure oil pipe, and the annular vertical water spray head 16 is installed on the support.

[0041] Further optimization scheme, the temperature control box 9 is provided with a display screen one 10, a switch two 11, a knob three 12 and a setting button 13.

[0042] Further optimization scheme, the water absorption device 25 is provided with a visual water absorption window 26, the electromagnetic flow sensor 17 is provided with a display screen two 19, and the load sensor 7 is provided with a display screen four 8.

[0043] Further optimization scheme, the pressure controller 1 is provided with a display screen three 2, a switch three 3 and a loading rate control switch 4.

[0044] In this embodiment, the high-precision scale drainage collection container 20 is provided with a display screen three 21, a knob one 24, a switch one 23 and a knob two 22.

[0045] In the device, the system linkage debugging is divided into single-component calibration and multi-component linkage test.

[0046] In the single-component calibration, the load system runs the hydraulic jack 6 in an idle state, sets different loading rates, verifies the loading rate fluctuation, and checks the force value deviation of the load sensor 7; the temperature control system sets target temperatures of 20℃, 50℃ and 80℃ respectively, verifies the temperature rising rate of the annular heating wire 15, and controls the temperature difference of different positions of the integrated test cabin to be less than or equal to 1℃; the drainage system adjusts the flow of the annular vertical water spray head 16 to be 1L / min, 5L / min and 10L / min, compares the data of the electromagnetic flow sensor 17 with the measurement value of the high-precision scale drainage collection container 20, and ensures that the error is less than or equal to 0.02L / min.

[0047] Multi-component linkage test simulates actual road conditions typical working conditions, that is, "temperature 60℃ + load 5kN + rainfall flow 3L / min", continuous operation for 30min, in the process, the coordination of each system is verified: first, the timeliness of data presentation, through the pressure controller 1 display screen three 2, temperature and pressure, temperature, flow data, ensure that the data display delay is small; second, the stability of the system, check the hydraulic circuit for no leakage, heating wire for no short circuit, drainage system for no leakage.

[0048] A method for simultaneously testing high-temperature stability and drainage performance of porous asphalt pavement, comprising the following steps:

[0049] Step one: open the hatch 36, soak the dust-free cloth with anhydrous ethanol, wipe the inside of the integrated test chamber 30, the loading plate, the water seepage pipe 18 and the workbench 32 thoroughly, ensure that the surface is free of oil stains and impurities; at the same time, check the water level in the water absorption device 25, ensure that it is in normal working condition, if the water level is insufficient, add to the appropriate scale, and confirm that the water absorption pipe 27 is not blocked through the visual water absorption window 26;

[0050] Step two: place the cured test piece smoothly on the loading plate 31; use a level to test the levelness of the test piece; ensure that the test piece is located directly below the hydraulic jack;

[0051] Step three: confirm that the loading plate and the upper surface of the test piece are closely attached, and check the uniformity of the contact pressure through the real-time feedback data of the load sensor 7; start the pre-water test, adjust the flow of the annular vertical water spray head 16 to 1L / min, and continue to water for 1min, observe the high-precision scale drainage collection container 20 and the water seepage pipe 18, ensure that there is no leakage phenomenon in the drainage;

[0052] Step four: set the loading mode, loading rate and target load or loading displacement upper limit on the pressure controller 1; input the target temperature, heating rate and constant temperature time on the operation interface of the temperature control box 9, start the temperature preheating program; adjust the flow of the annular vertical water spray head 16 through the drainage system control knob, start the water absorption device 25 to keep the water circulation, and set the flow collection interval time of the electromagnetic flow sensor 17;

[0053] Step five: After starting the temperature control system, the high-temperature nickel-chromium alloy ring-shaped heating 15 is operated at a temperature increase rate of 10°C / min, and the temperature monitoring display screen 10 real-time feedbacks the thermal radiation state and temperature field distribution of the test piece surface. When the center temperature of the test piece reaches the standard temperature gradient of 60-80°C, and after 15 min of constant temperature soaking, the load simulation system and the drainage system are started in turn, and the high-temperature stability and drainage performance test is carried out synchronously. In the load simulation system, the hydraulic jack 6 applies repeated load in the "loading for 1 s, unloading for 9 s" intermittent cycle mode, the loading rate is set at 0.1 mm / min, and the load is set at 0.7 MPa. The display screen one 10 real-time calculates the dynamic creep compliance D(t) = ε(t) / σ0(ε(t) is the vertical strain at t time, σ0 is the constant stress) and the cumulative deformation rate ε = Δh / h0 x 100%(Δh is the total deformation, h0 is the initial height) to evaluate the high-temperature stability. The drainage system forms a water circulation closed loop through the water absorption device 25, takes 5L standard water as the total water quantity of one drainage test cycle, supplies water to the ring-shaped vertical water spray head 16, and the ring-shaped semi-closed glass wall 34 restrains the water flow to ensure that the water evenly covers the test piece surface without spilling. When the water level in the ring-shaped semi-closed glass wall 34 no longer decreases, the test piece drainage is introduced into the electromagnetic flow sensor 17 through the water seepage pipe 35, and the display screen two calculates the drainage rate according to the formula v = V / (A·t)(V is the cumulative drainage quantity, A is the water seepage area, and t is the time length) to evaluate the drainage performance; During the test, a person is arranged to record the data of the pressure controller 1, the temperature control box 9 and the display screen two every 6 min, if the test piece deformation rate exceeds the set value, the load drops more than 10% or the temperature exceeds the set value ±2°C, etc. Abnormal conditions, immediately manually trigger the system emergency stop button, the system will automatically execute the unloading, water stopping and power off program, and save the real-time data, issue sound and light alarm signals;

[0054] Step six: when the upper limit of the loading displacement, the target load or the end of the test is reached, stop the load simulation system, the drainage system and the temperature control system in sequence, respectively, after the hydraulic jack 6 is completely unloaded and returns to its original position and the temperature of the integrated test chamber 30 drops below 40℃, take out the test piece, measure its final deformation with a vernier caliper, mark the crack position and expansion, put the test piece into a drying box for storage for subsequent analysis, the high-precision scaled drainage collection container 20 retains the amount of drainage 10s before the end of the test and records it, compressed air is used to blow the integrated test chamber 30, the loading plate and the workbench 32 to remove the residual asphalt debris, for stubborn stains, use a dust-free cloth soaked in xylene to wipe, ensure that there is no asphalt residue on the surface of the equipment, the components of the drainage system are repeatedly washed with clean water for 3 times, and after removing the residual moisture, they are dried, the remaining water in the water absorption device 25 is completely drained, and the water absorption pipe 27 and the visual water absorption window are cleaned, the power of the temperature control box 9 is turned off, and after the internal temperature drops to room temperature, the surface dust is wiped with a dry cloth, anti-rust oil is applied on the surface of the key components of the load sensor 7 and the electromagnetic flow sensor 17 to prevent metal components from being oxidized, finally, a dust cover is covered on the device, and it is properly stored for the next test.

[0055] 1. The porous asphalt pavement high-temperature stability and drainage performance synchronous test is realized, compared with the traditional separate high-temperature stability test and water permeability test, the test time and labor cost are greatly reduced, the interaction of the two performances under actual working conditions is simulated, and the test result has more practical guiding significance.

[0056] 2. The high-precision sensor and advanced control technology are used to realize accurate control and monitoring of the loading force, temperature, drainage flow and test piece deformation, and reliable data support is provided for mix design.

[0057] 3. The loading, temperature control, drainage monitoring and deformation monitoring are integrated, the structure is compact, the systems work cooperatively, no additional complex connection and debugging are needed, the operation is convenient, and the device is suitable for laboratory research and engineering site test and the like.

[0058] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A device for simultaneously testing the high-temperature stability and drainage performance of porous asphalt pavement, characterized in that, The utility model relates to a kind of integrated test cabin, including: load simulation system, the load simulation system is arranged in integrated test cabin (30) top wall, the load simulation system includes pressurizing mechanism, pressure controller (1) is fixedly connected outside integrated test cabin (30), the pressurizing mechanism is electrically connected with the pressure controller (1), annular vertical water nozzle (16) is provided in integrated test cabin (30), load sensor (7) is installed on the pressurizing mechanism, workbench (32) is provided in integrated test cabin (30), loading plate (31) is provided on the workbench (32); Drainage system, the drainage system includes water seepage pipe (18), water seepage pipe (35), annular semi-closed glass wall (34) and electromagnetic flow sensor (17), the water seepage pipe (35) is installed in annular semi-closed glass wall (34) below, the water seepage pipe (18) is installed in workbench (32) below, the water seepage pipe (18) is installed with the electromagnetic flow sensor (17), the water seepage pipe (18) is communicated with high-precision scale drainage collection container (20), the high-precision scale drainage collection container (20) and the annular vertical water nozzle (16) are communicated by water suction pipe (27), water suction device (25) is installed on the water suction pipe (27); Temperature control system, the temperature control system includes annular heating wire (15), the annular heating wire (15) is installed on the workbench (32), the annular heating wire (15) is electrically connected with temperature controller (28), the temperature controller (28) is connected with data transmission line (14), the data transmission line (14) is connected with temperature control box (9), K-type thermocouple (29) is installed in integrated test cabin (30), the K-type thermocouple (29) is electrically connected with the temperature control box (9). The pressurizing mechanism includes oil pump (5) and hydraulic jack (6), the oil pump (5) is communicated with the pressure controller (1), the oil pump (5) is fixedly connected on the top wall of the integrated test cabin (30), the oil pump (5) is communicated with high-pressure oil pipe, support is fixedly connected in the integrated test cabin (30), the hydraulic jack (6) is installed on the support, the hydraulic jack (6) is communicated with the oil pump (5), the annular vertical water nozzle (16) is installed on the support.

2. The device for testing the high-temperature stability and drainage performance of porous asphalt pavement simultaneously according to claim 1, characterized in that: Visual water suction window (26) is provided on the water suction device (25), display screen two (19) is provided on the electromagnetic flow sensor (17), display screen four (8) is provided on the load sensor (7).

3. The device for testing the high-temperature stability and drainage performance of porous asphalt pavement simultaneously according to claim 1, characterized in that: Display screen three (2), switch three (3) and loading rate control switch (4) are provided on the pressure controller (1).

4. The device for testing the high-temperature stability and drainage performance of porous asphalt pavement simultaneously according to claim 1, characterized in that: The utility model relates to a kind of integrated test cabin, including: load simulation system, the load simulation system is arranged in integrated test cabin (30) top wall, the load simulation system includes pressurizing mechanism, pressure controller (1) is fixedly connected outside integrated test cabin (30), the pressurizing mechanism is electrically connected with the pressure controller (1), annular vertical water nozzle (16) is provided in integrated test cabin (30), load sensor (7) is installed on the pressurizing mechanism, workbench (32) is provided in integrated test cabin (30), loading plate (31) is provided on the workbench (32); 5. A method for simultaneously testing the high-temperature stability and drainage performance of porous asphalt pavement, based on the method for simultaneously testing the high-temperature stability and drainage performance of porous asphalt pavement according to any one of claims 1-4, characterized in that, Drainage system, the drainage system includes water seepage pipe (18), water seepage pipe (35), annular semi-closed glass wall (34) and electromagnetic flow sensor (17), the water seepage pipe (35) is installed in annular semi-closed glass wall (34) below, the water seepage pipe (18) is installed in workbench (32) below, the water seepage pipe (18) is installed with the electromagnetic flow sensor (17), the water seepage pipe (18) is communicated with high-precision scale drainage collection container (20), the high-precision scale drainage collection container (20) and the annular vertical water nozzle (16) are communicated by water suction pipe (27), water suction device (25) is installed on the water suction pipe (27); Temperature control system, the temperature control system includes annular heating wire (15), the annular heating wire (15) is installed on the workbench (32), the annular heating wire (15) is electrically connected with temperature controller (28), the temperature controller (28) is connected with data transmission line (14), the data transmission line (14) is connected with temperature control box (9), K-type thermocouple (29) is installed in integrated test cabin (30), the K-type thermocouple (29) is electrically connected with the temperature control box (9). The pressurizing mechanism includes oil pump (5) and hydraulic jack (6), the oil pump (5) is communicated with the pressure controller (1), the oil pump (5) is fixedly connected on the top wall of the integrated test cabin (30), the oil pump (5) is communicated with high-pressure oil pipe, support is fixedly connected in the integrated test cabin (30), the hydraulic jack (6) is installed on the support, the hydraulic jack (6) is communicated with the oil pump (5), the annular vertical water nozzle (16) is installed on the support. Visual water suction window (26) is provided on the water suction device (25), display screen two (19) is provided on the electromagnetic flow sensor (17), display screen four (8) is provided on the load sensor (7). Display screen three (2), switch three (3) and loading rate control switch (4) are provided on the pressure controller (1). The utility model relates to a kind of integrated test cabin, including: load simulation system, the load simulation system is arranged in integrated test cabin (30) top wall, the load simulation system includes pressurizing mechanism, pressure controller (1) is fixedly connected outside integrated test cabin (30), the pressurizing mechanism is electrically connected with the pressure controller (1), annular vertical water nozzle (16) is provided in integrated test cabin (30), load sensor (7) is installed on the pressurizing mechanism, workbench (32) is provided in integrated test cabin (30), loading plate (31) is provided on the workbench (32); Step one: open the hatch (36), and use the alcohol-soaked duster to clean the inside of the integrated test chamber (30), the loading plate, the water infiltration pipe (18), and the workbench (32). Ensure that the surface is free of oil stains and impurities. At the same time, check the water level in the water absorption device (25) to ensure that it is in normal working condition. If the water level is insufficient, add water to the appropriate scale, and check the water absorption pipe (27) through the visual water absorption window (26) to ensure that it is not blocked. Step two: place the cured test specimen (33) on the loading plate (31) and use a level to check the levelness of the test specimen. Ensure that the jack (6) is directly below the test specimen. Step three: ensure that the hydraulic jack (6) is in close contact with the upper surface of the test specimen (33), close the hatch (36), and use the load sensor (7) to real-time feedback data to check the uniformity of the contact pressure. Start the pre-water test, adjust the flow rate of the ring-shaped vertical water spray head (16) to 1 L / min, and continue to water for 1 min. Observe the high-precision scale drainage collection container (20) and the water infiltration pipe (18) to ensure that there is no leakage. Step four: set the loading mode, loading rate, and target load or loading displacement upper limit on the pressure controller (1). Input the target temperature, heating rate, and constant temperature time on the temperature control box (9) interface, start the temperature preheating program, adjust the flow rate of the ring-shaped vertical water spray head (16) through the drainage system control knob, start the water absorption device (25) to maintain water circulation, and set the flow collection interval time of the electromagnetic flow sensor (17). Step five: start the temperature control system, and the ring-shaped heating wire (15) starts to heat up. When the temperature of the test specimen reaches the set value and maintains a constant temperature for a period of time, start the load simulation system and the drainage system in turn. In the load simulation system, the hydraulic jack (6) applies intermittent repeated load at the set rate, and the load sensor (7) real-time feedback force value. At the same time, start the drainage system, and the water absorption device (25) maintains water circulation to transport water to the ring-shaped vertical water spray head (16) to simulate rainfall. The rainfall is evenly distributed on the test specimen (33) in the ring-shaped semi-enclosed glass wall (34), and ensures that the rainfall does not fall outside the ring-shaped semi-enclosed glass wall. The water discharged by the test specimen enters the electromagnetic flow sensor (17) through the water infiltration pipe (35) under the ring-shaped semi-enclosed glass wall, and the data transmitted by the electromagnetic flow sensor is combined with display screen two to real-time calculate and display the drainage rate. During the test, record the data of the pressure controller (1), the temperature control box (9), and display screen two every 2 min. If abnormal conditions such as the deformation rate of the test specimen exceeding the set value, the load dropping more than 10%, or the temperature exceeding the set value ±2℃ occur, the system will automatically trigger the emergency stop button, automatically execute the unloading, water stopping, and power-off programs, save real-time data, and issue an audible and visual alarm signal. Step six: When the upper limit of loading displacement, target load or test end is reached, stop the load loading system, drainage system and temperature control system in sequence, respectively. After the hydraulic jack (6) is completely unloaded and the internal temperature of the integrated test chamber (30) drops below 40℃, open the chamber door and take out the test piece. Measure its final deformation with a vernier caliper, mark the crack position and expansion, and place the test piece in a drying box for subsequent analysis. The high-precision scaled drainage collection container (20) retains the drainage volume 10s before the end of the test and records it. Use compressed air to blow the integrated test chamber (30), loading plate and workbench (32) to remove residual asphalt debris. For stubborn stains, use a xylene-soaked lint-free cloth to wipe them off, ensuring that there is no asphalt residue on the surface of the equipment. Rinse the components of the drainage system with clean water for 3 times, and then dry them after removing the residual moisture. Empty all the remaining water in the water absorption device (25), and clean the water suction pipe (27) and the visual water suction window. Turn off the power of the temperature control box (9), and then use a dry cloth to wipe the surface dust after the internal temperature drops to room temperature. Apply anti-rust oil to the surface of the load sensor (7) and electromagnetic flow sensor (17) to prevent metal parts from oxidizing. Finally, close the chamber door and cover the device with a dust cover, and store it properly for the next test.

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