A device and method for detecting the impermeability of a road surface

Abstract

This invention provides a road pavement impermeability testing device and method, belonging to the field of road testing technology. The road pavement impermeability testing device includes a vehicle platform and a self-lifting measuring mechanism mounted on the vehicle platform. The self-lifting measuring mechanism includes a measuring cylinder, multiple first hydraulic cylinders, a fixing ring, multiple first guide rods, a pressure plate, a rubber sealing ring, and a thin tube. The multiple first guide rods are all slidably mounted through and on the vehicle platform. The fixing ring is fixedly mounted on the top of the multiple first guide rods. The pressure plate is fixedly mounted on the bottom of the multiple first guide rods. The rubber sealing ring is fixedly mounted on the bottom of the pressure plate, and the thin tube is fixedly mounted on the top of the pressure plate. The road pavement impermeability testing device and method provided by this invention have the advantages of high automation, reliable sealing, accurate testing, and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of road testing technology, and in particular to a road pavement impermeability testing device and testing method. Background Technology

[0002] Road pavement permeability testing is a core component of road engineering quality acceptance and durability assessment. The reliability of the test results directly depends on the stability of pressure application and the standardization of the operating procedures during the testing process. The core execution module of the pavement permeability testing device must undertake key tasks such as applying sealing pressure, locating the testing position, and transmitting permeability data. Its operating mode and pressure control accuracy directly affect testing efficiency, reliance on manual labor, and data consistency, making it particularly crucial in large-scale road testing projects.

[0003] Existing pavement impermeability testing devices mostly rely on manual pressing, heavy-load pressurization, or single power source drive. This not only requires continuous operator monitoring to maintain pressure, but manual pressurization is also susceptible to fluctuations in pressure output due to physical strength and operator skill, making it impossible to achieve stable and uniform pressure maintenance. This can lead to sealing gaps or pavement damage, affecting the accuracy of test data. The operation process involves many manual intervention steps, from pressure adjustment to water flow start and stop, all of which require manual operation. This is not only labor-intensive but also inefficient. Especially in scenarios with multiple test points and long distances, multiple operators are needed to work together, resulting in high labor costs. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a hydraulic tensioning instrument and its usage method that are highly automated, reliably sealed, accurately detected, and easy to operate. By integrating a self-lifting measuring mechanism, a road surface cleaning mechanism, a spraying mechanism, and an automatic water injection and return system, it achieves integrated operation of test point pretreatment, sealing, water injection, testing, and data acquisition. This effectively solves the defects of existing technologies such as poor sealing, poor pretreatment effect, cumbersome operation, and low data repeatability, and significantly improves the efficiency and accuracy of road surface impermeability testing.

[0005] To solve the above-mentioned technical problems, the present invention provides a road surface impermeability testing device, including a vehicle platform and a self-lifting measuring mechanism installed on the vehicle platform;

[0006] The self-lifting measuring mechanism includes a measuring cylinder, multiple first hydraulic cylinders, a fixing ring, multiple first guide rods, a pressure plate, a rubber sealing ring, and a thin tube. The multiple first guide rods are all slidably mounted through and on the vehicle plate. The fixing ring is fixedly mounted on the top of the multiple first guide rods. The pressure plate is fixedly mounted on the bottom of the multiple first guide rods. The rubber sealing ring is fixedly mounted on the bottom of the pressure plate. The thin tube is fixedly mounted on the top of the pressure plate. A circular carrier plate is fixedly fitted onto the outer wall of the thin tube. The measuring cylinder is fixedly mounted on the top of the circular carrier plate, and the top of the thin tube is located inside the measuring cylinder. The multiple first hydraulic cylinders are all fixedly mounted on the top of the vehicle plate. The output ends of the multiple first hydraulic cylinders are fixedly connected to the bottom of the fixing ring. A first solenoid valve is provided on the thin tube.

[0007] Furthermore, a water tank and a water pump are fixedly installed on the top of the vehicle platform. One end of a water pumping pipe is fixedly installed on the inlet of the water pump, and the other end of the water pumping pipe extends into the water tank. A drain pipe is fixedly installed on the top of the vehicle platform. The bottom end of the drain pipe is fixedly connected to the outlet of the water pump, and the top end extends directly above the measuring cylinder.

[0008] Furthermore, one end of an overflow pipe is fixedly installed on the outer wall of the measuring cylinder, and one end of a flexible hose is fixedly installed on the other end of the overflow pipe. A connecting pipe is fixedly installed on the top of the water tank, and the other end of the flexible hose is fixedly connected to the top end of the connecting pipe. A second solenoid valve is provided on the overflow pipe.

[0009] Furthermore, a road cleaning mechanism is provided on the vehicle panel;

[0010] The road cleaning mechanism includes a hexagonal rotating rod, a hexagonal sliding sleeve, a long carrier plate, a grinding disc, a first motor, and a second motor. The hexagonal rotating rod is rotatably mounted on the bottom of the vehicle platform. The hexagonal sliding sleeve is slidably fitted onto the hexagonal rotating rod. The long carrier plate is fixedly mounted on the bottom of the hexagonal sliding sleeve. A rotating shaft is rotatably mounted through the long carrier plate. The grinding disc is fixedly mounted on the bottom end of the rotating shaft. The first motor is fixedly mounted on the top of the long carrier plate, and its output end is fixedly connected to the top end of the rotating shaft. The second motor is fixedly mounted on the top of the vehicle platform, and its output end is fixedly connected to the top end of the hexagonal rotating rod. A second hydraulic cylinder is fixedly mounted on the hexagonal rotating rod, and its output end is fixedly connected to the long carrier plate.

[0011] Furthermore, two positioning rods are fixedly installed at the bottom of the vehicle plate, and the long carrier plate is located between the two positioning rods.

[0012] Furthermore, the long carrier plate and the vehicle plate are also equipped with a spraying mechanism;

[0013] The blowing mechanism includes a blower base, a fixed base, a strip-shaped air guide nozzle, an electric push rod, a corrugated pipe, and a blower. The fixed base is fixedly installed on the top of the long carrier plate, and the blower base is slidably installed on the fixed base. An air chamber is opened inside the blower base. The electric push rod is fixedly installed on the long carrier plate, and the output end of the electric push rod is fixedly connected to the blower base. A strip-shaped air guide nozzle is fixedly installed on the outer wall of the blower base near the rubber sealing ring. The strip-shaped air guide nozzle communicates with the air chamber. The blower is fixedly installed on the top of the vehicle plate, and an exhaust pipe is fixedly installed on the air outlet of the blower. The bottom end of the exhaust pipe extends to the bottom of the vehicle plate. One end of the corrugated pipe is fixedly connected to the bottom end of the exhaust pipe, and the other end is fixedly connected to the blower base.

[0014] Preferably, two second guide slide rods are slidably mounted through the fixed base, and one end of each of the two second guide slide rods is fixedly connected to the blower base.

[0015] Furthermore, a fixing rod is fixedly installed at the end of the long carrier plate away from the hexagonal sliding sleeve, an arc-shaped slide rail is fixedly installed at the bottom of the vehicle plate, a T-shaped slide rail is provided inside the arc-shaped slide rail, a slider is slidably installed inside the T-shaped slide rail, a hanging rod is fixedly installed at the bottom of the slider, and the bottom end of the hanging rod is fixedly connected to the fixing rod.

[0016] Preferably, a plurality of balls are movably embedded in the slider, and all of the plurality of balls are in contact with the inner wall of the T-shaped slide.

[0017] To address the above problems, the present invention also provides a method for testing the impermeability of road surfaces, comprising the following steps:

[0018] T1: Fill the water tank with enough clean water to ensure that the water is clean and free of sediment;

[0019] T2: Randomly select 3 to 5 test points for each road segment, move the vehicle plate to the position of the first test point, and make the center of the pressure plate coincide with the test point;

[0020] T3: Push the pressure plate to lower the rubber sealing ring until it is tightly fitted to the pre-treated test point surface; use the counterweight on the top of the vehicle to increase the sealing pressure and ensure that there is no gap between the rubber sealing ring and the road surface;

[0021] T4: Open the second solenoid valve on the overflow pipe and start the water pump. Water is injected into the cylinder through the drain pipe to the preset upper limit mark. Excess water flows back to the water tank through the overflow pipe and hose to maintain a stable water level.

[0022] T5: Record the time required for the water level in the graduated cylinder to drop from the upper limit mark to the lower limit mark. If the water level drops too quickly, record the time it takes to drop to the bottom of the graduated cylinder.

[0023] T6: Calculate the permeability coefficient based on the recorded data.

[0024] Compared with related technologies, the road pavement impermeability testing device provided by the present invention has the following beneficial effects:

[0025] 1. Significantly improved sealing reliability: Through the coordinated operation of the road cleaning mechanism and the blowing mechanism, the grinding disc can automatically level the surface of the test point, and the strip-shaped air nozzle can efficiently blow away impurities, ensuring that the contact surface between the rubber sealing ring and the road surface is clean and flat; at the same time, the mechanical pressure of the first hydraulic cylinder and the gravity of the counterweight on the top of the vehicle plate are superimposed, and with the first guide slide rod guiding the verticality of the pressure plate, it effectively avoids uneven force on the rubber sealing ring, completely solves the water leakage problem caused by the sealing gap in traditional devices, and ensures the accuracy of the test data;

[0026] 2. High degree of automation and improved testing efficiency: The system integrates an automatic water injection and return system, a road pretreatment mechanism, and a self-lifting measuring mechanism, achieving fully automated operation of the pretreatment, sealing, water injection, and testing processes. The water pump, drainage pipe, and overflow pipe work together to complete quantitative water injection and residual water recovery without manual intervention. Road cleaning and spraying processes also require no manual operation; a single person can complete the entire testing process, significantly reducing labor costs and improving testing efficiency, making it particularly suitable for large-scale road inspection projects.

[0027] 3. High repeatability and accuracy of test data: The automatic water injection and return system ensures that the initial water level is consistent for each test through the return effect of the overflow pipe and the hose, avoiding errors caused by manual water injection; the protective structure of the thin pipe prevents pipe deformation, ensures unobstructed water seepage channels, and makes the recording of water level changes more accurate; the random selection of multiple test points and standardized operating procedures further improve the comparability and reliability of test results.

[0028] Compared with related technologies, the road pavement impermeability testing method provided by this invention has the following advantages:

[0029] The road pavement impermeability testing method of the present invention uses the above-mentioned testing device to conduct the test. It transforms the structural advantages of the device, such as automated power drive, stable pressure application, and precise on / off control, into standardized operation of the testing process. This significantly reduces manual intervention in core steps such as manual pressure application, manual leveling, and water flow start / stop. It not only reduces the labor intensity and labor costs of operators, but also avoids the impact of the arbitrariness of manual operation on the testing process. It ensures the stability of pressure application at each test point and the consistency of testing operation, effectively improving testing efficiency. At the same time, it ensures the accuracy and repeatability of test data such as the permeability coefficient, and is suitable for the actual application needs of large-scale road testing projects. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the road surface impermeability testing device provided by the present invention;

[0031] Figure 2 for Figure 1 Another structural schematic diagram of the road surface impermeability testing device shown;

[0032] Figure 3 for Figure 1 A top view of the road surface impermeability testing device shown;

[0033] Figure 4 for Figure 1 The diagram shows the structure of the self-lifting measuring mechanism.

[0034] Figure 5 for Figure 4 The diagram shows the connection between the circular carrier plate and the pressure plate.

[0035] Figure 6 for Figure 2 The diagram shown is a structural schematic of the road cleaning mechanism.

[0036] Figure 7 for Figure 6 A schematic diagram of the road cleaning mechanism from another perspective;

[0037] Figure 8 for Figure 6 A cross-sectional view of the blower holder shown;

[0038] Figure 9 for Figure 7 The diagram shows the interaction between the slider and the curved slide rail.

[0039] Numbering on the map:

[0040] 1. Car platform; 2. Measuring cylinder; 3. First hydraulic cylinder; 4. Fixing ring; 5. First guide slide rod; 6. Pressure plate; 7. Rubber sealing ring; 8. Thin tube; 9. Circular carrier plate; 10. Water tank; 11. Hose; 12. Water pump; 13. Water suction pipe; 14. Drain pipe; 15. Hexagonal rotating rod; 16. Hexagonal sliding sleeve; 17. Long carrier plate; 18. Grinding disc; 19. First electric motor; 20. Second electric motor; 21. Air blower seat; 22. Second hydraulic cylinder; 23. Fixing seat; 24. Strip-shaped air guide nozzle; 25. Electric push rod; 26. Corrugated pipe; 27. Blower; 28. Exhaust pipe; 29. ​​Fixing rod; 30. Hanging rod; 31. Arc-shaped slide rail; 32. Slider; 210. Air chamber. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] First Embodiment

[0043] Please refer to the following: Figures 1-9 In the first embodiment of the present invention, a road surface impermeability testing device is proposed, which includes: a vehicle plate 1 and a self-lifting measuring mechanism disposed on the vehicle plate 1. The vehicle plate 1 serves as the bearing base of the entire testing device, and four wheels are provided at its bottom. A trailer is also rotatably installed at the front end, which can be connected to a traction device for easy long-distance transportation.

[0044] The self-lifting measuring mechanism specifically includes a measuring cylinder 2, multiple first hydraulic cylinders 3, a fixing ring 4, multiple first guide slide rods 5, a pressure plate 6, a rubber sealing ring 7, and a thin tube 8. The multiple first guide slide rods 5 are all slidably mounted on the vehicle plate 1. The fixing ring 4 is fixedly mounted on the top of the multiple first guide slide rods 5. The pressure plate 6 is fixedly mounted on the bottom of the multiple first guide slide rods 5. The rubber sealing ring 7 is fixedly mounted on the bottom of the pressure plate 6, directly contacting the road surface. Its annular structure tightly adheres to the road surface under the pressure of the pressure plate 6, forming a closed water cavity. The thin tube 8 is fixedly mounted on the top of the pressure plate 6. A circular carrier plate 9 is fixedly sleeved on the outer wall of the thin tube 8. The thin tube 8 serves as a seepage channel, with its top extending into the measuring cylinder 2 and its bottom communicating with the closed water cavity to achieve the transmission of seepage flow. Multiple support rods are fixedly installed between the circular carrier plate 9 and the pressure plate 6. The circular carrier plate 9 and the support rods constitute the protective structure of the thin tube 8, allowing the measuring cylinder to... The weight of tube 2 is distributed to pressure plate 6 to prevent tube 8 from deforming or breaking due to bearing the load alone, ensuring unobstructed water seepage channels. Measuring cylinder 2 is fixedly installed on top of circular carrier plate 9, and the top end of tube 8 is located inside measuring cylinder 2. Multiple first hydraulic cylinders 3 are fixedly installed on top of vehicle plate 1. The output ends of multiple first hydraulic cylinders 3 are fixedly connected to the bottom of fixed ring 4. First hydraulic cylinders 3 are lifting power sources. By driving fixed ring 4 to move vertically along first guide slide rod 5, pressure plate 6 is driven to rise and fall synchronously. First solenoid valve is installed on tube 8. First solenoid valve is used to control the opening and closing of tube 8. It is closed before testing to ensure water cavity sealing during water injection. It is opened during testing to allow seepage water into measuring cylinder 2. Multiple counterweights are also fixedly installed on top of vehicle plate 1 to increase the mass of the entire device. Combined with the mechanical pressure of pressure plate 6, it further improves the sealing reliability of rubber sealing ring 7 and road surface, and avoids water leakage due to insufficient pressure during testing.

[0045] In this embodiment, in order to automatically fill the measuring cylinder 2 with water, a water tank 10 and a water pump 12 are fixedly installed on the top of the vehicle platform 1. The water tank 10 is used to store test water, and the water pump 12 provides power for automatic water filling. One end of the water pump 13 is fixedly installed on the water inlet of the water pump 12, and the other end of the water pump 13 extends into the water tank 10. A drain pipe 14 is fixedly installed on the top of the vehicle platform 1. The bottom end of the drain pipe 14 is fixedly connected to the water outlet of the water pump 12, and the top end extends to the top of the measuring cylinder 2. The water pump 12, the water pump 13, and the drain pipe 14 work together to form an automatic water filling channel to realize quantitative water replenishment of the measuring cylinder 2.

[0046] In this embodiment, in order to automatically drain excess water from the measuring cylinder 2 and return it to the water tank 10, one end of an overflow pipe is fixedly installed on the outer wall of the measuring cylinder 2, and one end of a hose 11 is fixedly installed on the other end of the overflow pipe. A connecting pipe is fixedly installed on the top of the water tank 10, and the other end of the hose 11 is fixedly connected to the top of the connecting pipe. A second solenoid valve is provided on the overflow pipe. The overflow pipe, hose 11, and connecting pipe form a return loop. When the water level in the measuring cylinder 2 exceeds the set height, excess water returns to the water tank 10 through this loop, which avoids water waste, ensures the consistency of the initial water level of the test, and improves data repeatability.

[0047] In this embodiment, in order to level the surface of the road test point and clean the attached impurities, a road cleaning mechanism is provided on the vehicle plate 1.

[0048] The road cleaning mechanism includes a hexagonal rotating rod 15, a hexagonal sliding sleeve 16, a long carrier plate 17, a grinding disc 18, a first motor 19, and a second motor 20. The hexagonal rotating rod 15 is rotatably mounted on the bottom of the vehicle platform 1. The hexagonal sliding sleeve 16 is slidably fitted onto the hexagonal rotating rod 15. The hexagonal sliding sleeve 16 and the hexagonal rotating rod 15 are in sliding fit, which can synchronously transmit rotational power and allow the long carrier plate 17 to move axially. The long carrier plate 17 is fixedly mounted on the bottom of the hexagonal sliding sleeve 16. A rotating shaft is rotatably mounted through the long carrier plate 17. The grinding disc 18 is fixedly mounted on the bottom end of the rotating shaft. The bottom of the grinding disc 18 is provided with several grinding teeth, which can level the surface of the test point and remove loose particles during high-speed rotation. A small protrusion is present. The first motor 19 is fixedly installed on the top of the long carrier plate 17. The output end of the first motor 19 is fixedly connected to the top of the rotating shaft. The first motor 19 provides rotational power for the grinding disc 18. The second motor 20 is fixedly installed on the top of the vehicle plate 1. The output end of the second motor 20 is fixedly connected to the top of the hexagonal rotating rod 15. The second motor 20 drives the hexagonal rotating rod 15 to rotate, thereby causing the long carrier plate 17 to switch positions. A second hydraulic cylinder 22 is fixedly installed on the hexagonal rotating rod 15. The output end of the second hydraulic cylinder 22 is fixedly connected to the long carrier plate 17. The second hydraulic cylinder 22 drives the long carrier plate 17 to move axially along the hexagonal rotating rod 15 through extension and retraction, thereby realizing the lifting and lowering of the grinding disc 18.

[0049] In this embodiment, in order to limit the rotation range of the long carrier plate 17, two positioning rods are fixedly installed at the bottom of the vehicle plate 1. The long carrier plate 17 is located between the two positioning rods. The two positioning rods limit the rotation range of the long carrier plate 17 to 60°. In the initial state, the long carrier plate 17 is in contact with the front positioning rod. After rotating 60°, it abuts against the rear positioning rod. In this state, the grinding disc 18 and the pressure plate 6 are coaxial. Through the above-mentioned mechanical limiting method, it is ensured that the grinding disc 18 can accurately switch the initial position and the test point alignment position.

[0050] In this embodiment, in order to automatically blow away the impurities cleaned from the test points, a spraying mechanism is also provided on the long carrier plate 17 and the vehicle plate 1. The spraying mechanism works in conjunction with the road cleaning mechanism to clean the test points and ensure that there are no impurities left on the sealing surface.

[0051] The blowing mechanism includes a blower seat 21, a fixed seat 23, a strip-shaped air nozzle 24, an electric push rod 25, a bellows 26, and a blower 27. The fixed seat 23 is fixedly installed on the top of the long carrier plate 17, and the blower seat 21 is slidably installed on the fixed seat 23. Specifically, two second guide rods are slidably installed through the fixed seat 23, and one end of each second guide rod is fixedly connected to the blower seat 21. The second guide rods limit the movement direction of the blower seat 21 to ensure smooth reciprocating movement. An air chamber 210 is opened inside the blower seat 21. The electric push rod 25 is fixedly installed on the long carrier plate 17, and the output end of the electric push rod 25 is fixedly connected to the blower seat 21. The electric push rod 25 drives the blower seat 21 to reciprocate along the guide rods. The blowing range is expanded by moving the blower base 21. A strip-shaped air guide nozzle 24 is fixedly installed on the outer wall of the blower base 21 near the rubber sealing ring 7. The strip-shaped air guide nozzle 24 is connected to the air chamber 210. The strip-shaped air guide nozzle 24 makes the airflow cover the grinding area in a strip shape, effectively blowing away dust and residual impurities. The blower 27 is fixedly installed on the top of the vehicle plate 1. The blower 27 provides high-pressure airflow to the blowing mechanism. An exhaust pipe 28 is fixedly installed on the air outlet of the blower 27. The bottom end of the exhaust pipe 28 extends to the bottom of the vehicle plate 1. One end of the corrugated pipe 26 is fixedly connected to the bottom end of the exhaust pipe 28, and the other end is fixedly connected to the blower base 21. The corrugated pipe 26 can flexibly deform with the rotation and lifting of the long carrier plate 17 to ensure the continuity of airflow delivery.

[0052] In this embodiment, to increase the reliability of the long carrier plate 17 support, a fixing rod 29 is fixedly installed at the end of the long carrier plate 17 away from the hexagonal sliding sleeve 16, an arc-shaped slide rail 31 is fixedly installed at the bottom of the vehicle plate 1, a T-shaped slide rail 31 is provided in the arc-shaped slide rail 31, a slider 32 is slidably installed in the T-shaped slide rail, a hanging rod 30 is fixedly installed at the bottom of the slider 32, and the bottom end of the hanging rod 30 is fixedly connected to the fixing rod 29. The fixing rod 29, the arc-shaped slide rail 31, the slider 32 and the hanging rod 30 constitute the auxiliary support structure of the long carrier plate 17 to prevent the long carrier plate 17 from deforming.

[0053] In this embodiment, in order to reduce the friction between the slider 32 and the T-shaped slide, multiple balls are movably embedded on the slider 32. All the balls are in contact with the inner wall of the T-shaped slide. The balls reduce the frictional resistance between the slider 32 and the T-shaped slide, ensuring that the long carrier plate 17 rotates smoothly.

[0054] In this embodiment:

[0055] The device is towed to the road surface area to be tested by a towing vehicle. A test point that is flat and free of obvious cracks and potholes is selected, and the projection center of the pressure plate 6 is aligned with the test point.

[0056] Then, the second motor 20 is started, and its output end drives the hexagonal rotating rod 15 to rotate. The long carrier plate 17 rotates synchronously under the transmission of the hexagonal sliding sleeve 16 until it abuts against the rear positioning rod. At this time, the grinding disc 18 is coaxial with the pressure plate 6 (i.e., aligned with the test point). Then, the second hydraulic cylinder 22 is started, and its output end pushes the long carrier plate 17 to move downward along the hexagonal rotating rod 15, so that the grinding disc 18 fits against the surface of the road test point. At the same time, the first motor 19 is started, driving the rotating shaft to drive the grinding disc 18 to rotate at high speed, leveling the surface of the test point, removing loose particles, dust and small protrusions. Then, the output end of the second hydraulic cylinder 22 is started to retract, driving the long carrier plate 17 to rise to the initial height. Then, the second motor 20 is started to run, driving the long carrier plate 17 to rotate, so that it abuts against the front positioning rod again, completing the reset.

[0057] Start the blower 27 to run. When it is working, it generates a high-pressure airflow, which is sent into the air chamber 210 through the exhaust pipe 28 and the bellows 26, and then sprayed out through the strip-shaped air guide nozzle 24. Then start the electric push rod 25 to drive the blower seat 21 to move back and forth along the second guide slide rod, so that the airflow fully covers the grinding area and blows away the dust and residual impurities generated during grinding from the test point, ensuring that the sealing surface is clean and flat.

[0058] After the pretreatment work at the above test points is completed, blower 27 is turned off, and then multiple first hydraulic cylinders 3 are started. Their output ends push the fixing ring 4 downward in sync. The fixing ring 4 drives multiple first guide slide rods 5 to descend vertically along the guide holes of the vehicle plate 1, thereby driving the pressure plate 6 and the rubber sealing ring 7 to move downward until the rubber sealing ring 7 is tightly attached to the surface of the pretreated test point (in order to ensure a reliable seal, relevant personnel can also apply sealant to the bottom of the rubber sealing ring 7). The counterweight block at the top of the vehicle plate 1 presses down by gravity, in conjunction with the mechanical pressure of the first hydraulic cylinder 3, to ensure that the rubber sealing ring 7 forms a reliable seal with the road surface, without any gaps for air or water leakage.

[0059] Start the water pump 12 to draw clean water from the water tank 10 through the water pipe 13, and fill the measuring cylinder 2 with water through the drain pipe 14. When the water level reaches the upper limit of the measuring cylinder 2, the water pump 12 stops working. If too much water is added, the excess water flows back to the water tank 10 through the overflow pipe and hose 11 to ensure that the initial water level in the measuring cylinder 2 is consistent. Observe whether there are any signs of water leakage around the rubber sealing ring 7. If there is leakage, it can be further compacted by adding counterweights or adjusting the pressure of the first hydraulic cylinder 3 to ensure the sealing effect.

[0060] Open the first solenoid valve on the thin tube 8. At this time, the water in the measuring cylinder 2 flows into the closed water cavity formed by the rubber sealing ring 7 and the road surface through the thin tube 8, and the timing starts at the same time. Subsequently, observe the changes in the water level in the measuring cylinder 2 in real time and record the time required for the water level to drop from the upper limit scale to the lower limit scale. If the road surface seeps water too quickly, the time it takes to drop to the bottom of the measuring cylinder 2 can be recorded.

[0061] After the test is completed, close the first solenoid valve and stop the timing; start the first hydraulic cylinder 3 to retract, driving the pressure plate 6 and rubber sealing ring 7 to rise and reset; then clean the residual impurities on the surface of the rubber sealing ring 7 and check whether each component is intact; if the next test point needs to be tested, repeat the above steps.

[0062] Second embodiment:

[0063] In a second embodiment of the present invention, a method for testing the impermeability of road pavement is provided, comprising the following steps:

[0064] T1: Fill water tank 10 with sufficient clean water to ensure that the water is clean and free of sediment;

[0065] T2: Randomly select 3 to 5 test points for each road segment, move the vehicle plate 1 to the position of the first test point, and make the center of the pressure plate 6 coincide with the test point;

[0066] T3: Push the pressure plate 6 to lower the rubber sealing ring 7 until the rubber sealing ring 7 is tightly attached to the surface of the pre-treated test point; use the counterweight block on the top of the vehicle plate 1 to increase the sealing pressure and ensure that there is no gap between the rubber sealing ring 7 and the road surface;

[0067] T4: Open the second solenoid valve on the overflow pipe and start the water pump 12. Water is injected into the vector cylinder 2 through the drain pipe 14 to the preset upper limit scale. Excess water flows back to the water tank 10 through the overflow pipe and the hose 11 to maintain a stable water level.

[0068] T5: Record the time required for the water level in graduated cylinder 2 to drop from the upper limit mark to the lower limit mark. If the water level drops too quickly, record the time it takes to drop to the bottom of graduated cylinder 2.

[0069] T6: Calculate the permeability coefficient based on the recorded data. The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A road pavement impermeability testing device, characterized in that, The vehicle platform (1) and the self-lifting measuring mechanism set on the vehicle platform (1); The self-lifting measuring mechanism includes a measuring cylinder (2), multiple first hydraulic cylinders (3), a fixing ring (4), multiple first guide slide rods (5), a pressure plate (6), a rubber sealing ring (7), and a thin tube (8). The multiple first guide slide rods (5) are all slidably mounted on the vehicle plate (1). The fixing ring (4) is fixedly mounted on the top of the multiple first guide slide rods (5). The pressure plate (6) is fixedly mounted on the bottom of the multiple first guide slide rods (5). The rubber sealing ring (7) is fixedly mounted on the pressure plate. At the bottom of the plate (6), the thin tube (8) is fixedly installed on the top of the pressure plate (6), and a circular carrier plate (9) is fixedly sleeved on the outer wall of the thin tube (8). The measuring cylinder (2) is fixedly installed on the top of the circular carrier plate (9), and the top end of the thin tube (8) is located inside the measuring cylinder (2). Multiple first hydraulic cylinders (3) are fixedly installed on the top of the car plate (1). The output ends of multiple first hydraulic cylinders (3) are fixedly connected to the bottom of the fixing ring (4). A first solenoid valve is provided on the thin tube (8). A water tank (10) and a water pump (12) are fixedly installed on the top of the vehicle platform (1). One end of a water pump pipe (13) is fixedly installed on the inlet of the water pump (12). The other end of the water pump pipe (13) extends into the water tank (10). A drain pipe (14) is fixedly installed on the top of the vehicle platform (1). The bottom end of the drain pipe (14) is fixedly connected to the outlet of the water pump (12), and the top end extends to the top of the measuring cylinder (2). The vehicle platform (1) is equipped with a road cleaning mechanism; The road cleaning mechanism includes a hexagonal rotating rod (15), a hexagonal sliding sleeve (16), a long carrier plate (17), a grinding disc (18), a first motor (19), and a second motor (20). The hexagonal rotating rod (15) is rotatably mounted on the bottom of the vehicle platform (1). The hexagonal sliding sleeve (16) is slidably mounted on the hexagonal rotating rod (15). The long carrier plate (17) is fixedly mounted on the bottom of the hexagonal sliding sleeve (16). A rotating shaft is rotatably mounted through the long carrier plate (17). The grinding disc (18) is fixedly mounted on the vehicle platform (1). At the bottom end of the shaft, the first motor (19) is fixedly installed on the top of the long carrier plate (17), and the output end of the first motor (19) is fixedly connected to the top end of the shaft. The second motor (20) is fixedly installed on the top of the vehicle plate (1), and the output end of the second motor (20) is fixedly connected to the top end of the hexagonal rotating rod (15). A second hydraulic cylinder (22) is fixedly installed on the hexagonal rotating rod (15), and the output end of the second hydraulic cylinder (22) is fixedly connected to the long carrier plate (17). Two positioning rods are fixedly installed at the bottom of the vehicle plate (1), and the long carrier plate (17) is located between the two positioning rods.

2. The road pavement impermeability testing device according to claim 1, characterized in that, One end of an overflow pipe is fixedly installed on the outer wall of the measuring cylinder (2), and the other end of a hose (11) is fixedly installed on the other end of the overflow pipe. A connecting pipe is fixedly installed on the top of the water tank (10), and the other end of the hose (11) is fixedly connected to the top end of the connecting pipe. A second solenoid valve is provided on the overflow pipe.

3. The road pavement impermeability testing device according to claim 1, characterized in that, The long carrier plate (17) and the vehicle plate (1) are also equipped with a spraying mechanism; The blowing mechanism includes a blower seat (21), a fixed seat (23), a strip-shaped air guide nozzle (24), an electric push rod (25), a bellows pipe (26), and a blower (27). The fixed seat (23) is fixedly installed on the top of the long carrier plate (17). The blower seat (21) is slidably installed on the fixed seat (23). An air chamber (210) is opened in the blower seat (21). The electric push rod (25) is fixedly installed on the long carrier plate (17). The output end of the electric push rod (25) is fixedly connected to the blower seat (21). A strip-shaped air guide nozzle (24) is fixedly installed on the outer wall of the air seat (21) near the rubber sealing ring (7). The strip-shaped air guide nozzle (24) is connected to the air chamber (210). The blower (27) is fixedly installed on the top of the vehicle plate (1). An exhaust pipe (28) is fixedly installed on the air outlet of the blower (27). The bottom end of the exhaust pipe (28) extends to the bottom of the vehicle plate (1). One end of the corrugated pipe (26) is fixedly connected to the bottom end of the exhaust pipe (28), and the other end is fixedly connected to the air blower seat (21).

4. The road pavement impermeability testing device according to claim 3, characterized in that, Two second guide rods are slidably installed through the fixed base (23), and one end of each of the two second guide rods is fixedly connected to the blower base (21).

5. The road pavement impermeability testing device according to claim 3, characterized in that, A fixing rod (29) is fixedly installed at the end of the long carrier plate (17) away from the hexagonal sliding sleeve (16). An arc-shaped slide rail (31) is fixedly installed at the bottom of the vehicle plate (1). A T-shaped slide rail is provided inside the arc-shaped slide rail (31). A slider (32) is slidably installed inside the T-shaped slide rail. A hanging rod (30) is fixedly installed at the bottom of the slider (32). The bottom end of the hanging rod (30) is fixedly connected to the fixing rod (29).

6. The road pavement impermeability testing device according to claim 5, characterized in that, The slider (32) is movably embedded with multiple balls, and all of the balls are in contact with the inner wall of the T-shaped slide.

7. A method for testing the permeability of road surface using the road surface permeability testing device as described in any one of claims 1-6, characterized in that, Includes the following steps: T1: Pour enough clean water into the water tank (10) to ensure that the water is clean and free of mud and sand; T2: Randomly select 3 to 5 test points for each road segment, move the vehicle plate (1) to the position of the first test point, and make the center of the pressure plate (6) coincide with the test point; T3: Push the pressure plate (6) to drive the rubber sealing ring (7) down until the rubber sealing ring 7 is tightly attached to the surface of the pre-treated test point; use the counterweight block on the top of the vehicle plate (1) to increase the sealing pressure and ensure that there is no gap between the rubber sealing ring (7) and the road surface; T4: Open the second solenoid valve on the overflow pipe and start the water pump (12). Water is injected into the vector cylinder (2) through the drain pipe (14) to the preset upper limit scale. Excess water flows back to the water tank (10) through the overflow pipe and the hose (11) to maintain a stable water level. T5: Record the time required for the water level in the graduated cylinder (2) to drop from the upper limit mark to the lower limit mark. If the water level drops too quickly, record the time it takes to drop to the bottom of the graduated cylinder (2). T6: Calculate the permeability coefficient based on the recorded data.

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