Highway high-fill roadbed slope and cavity disease detection device thereof

Abstract

The highway high-fill roadbed slope and cavity disease detection device comprises a plurality of branch baffles which are arranged along the slope surface at equal intervals, every two adjacent branch baffles are arranged close to each other, a through opening is formed in the lower portion of each branch baffle and used for guaranteeing the growth space of slope surface plants, and a drainage mechanism is arranged on the upper portion of each branch baffle; the drainage mechanism comprises a water storage tank, a bearing plate, a drainage pipe, an adjusting pipe and a closing assembly. The water storage tank is obliquely embedded in the upper portion of the supporting baffle, a plurality of discharge outlets are formed in the end, close to the through opening, of the water storage tank, and the closing assembly is movably arranged in the water storage tank and can automatically control opening and closing of the discharge outlets according to water level changes in the water storage tank. Through cooperation of the supporting baffles and the drainage mechanism, erosion loss prevention in rainstorm and dry crack prevention in water and soil supplementation in light rain are achieved, ecological slope fixation is compatible, the structural stability is improved, pipeline and roadbed cavities are accurately checked in cooperation with the cavity disease detection device capable of achieving full-range adjustment, and long-term safety and stability of the side slope are comprehensively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of slope protection technology, specifically a device for detecting cavities and other defects in high embankment roadbed slopes of highways. Background Technology

[0002] In highway construction, high embankment slopes, due to their large embankment height, high soil self-weight load, and long-term exposure to the natural environment, present significant challenges in soil and water conservation, structural stability, and full-cycle disease prevention. Current protective structures for high embankment slopes often focus on a single function, failing to meet the dual requirements of "preventing erosion during heavy rain" and "replenishing soil and water during light rain." In traditional retaining wall protection schemes, some designs rely solely on drainage holes for rapid drainage. While this can reduce water accumulation during heavy rain, in light rain, rainwater quickly escapes through the drainage holes, failing to replenish the moisture in the shallow soil of the slope. This results in the soil remaining in a state of drought for a long time, making it prone to shrinkage cracks. As the cracks continue to develop, they will form rainwater infiltration channels, exacerbating the saturation of the deeper soil and increasing the risk of landslides. Another type of protective structure improves soil water retention by using closely spaced retaining walls or reducing drainage channels. While this can retain moisture during light rain, rainwater cannot drain quickly from the slope during heavy rain, causing the moisture content of the shallow soil to rise sharply and exceed the saturation threshold. This leads to a sharp decrease in the friction between soil particles and insufficient shear strength, which can easily cause shallow landslides or overall landslides. Furthermore, the lateral pressure exerted by the accumulated water on the retaining walls can cause them to tilt and shift, further damaging the protective system.

[0003] Meanwhile, the cavitation defects on the slopes of high embankment subgrades are mostly caused by insufficient compaction during construction, soil erosion by rainwater, or pipeline leakage. If they are not detected and repaired in time, they can easily lead to drainage system failure and subgrade settlement. Although some vehicle-mounted detection devices on the market are equipped with ground-penetrating radar modules, their adjustment functions are limited, and they can only achieve angle or height adjustment in a single direction. They cannot be flexibly adapted to the detection target (different depths of pipelines and subgrades), resulting in incomplete radar signal coverage and low detection accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a detection device for the cavities and defects of high embankment roadbed slopes and their defects on highways, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high embankment slope for highways, comprising a plurality of retaining plates equidistantly arranged along the slope surface, with two adjacent retaining plates positioned close to each other. The lower part of each retaining plate has an opening to ensure growth space for slope vegetation. The upper part of each retaining plate is provided with a drainage mechanism. This drainage mechanism includes a water storage tank, a load-bearing plate, a drainage pipe, a regulating pipe, and a closing assembly. The water storage tank is inclinedly embedded in the upper part of the retaining plate, and a plurality of discharge ports are provided at the end of the water storage tank near the opening. The closing assembly is movably disposed within the water storage tank and can automatically control the opening and closing of the discharge ports according to changes in the water level within the water storage tank. The load-bearing plate is slidably assembled inside the water storage tank. Several springs connect the load-bearing plate to the bottom of the water storage tank, and its side is in contact with the inner wall of the water storage tank. The drain pipe is connected to the bottom of the water storage tank, and the other end of the drain pipe extends to connect with the underground main discharge pipe. The regulating pipe is slidably embedded in the drain pipe, and its upper end extends to connect with the middle of the load-bearing plate. Several seepage holes are opened on the upper outer circumference of the drain pipe. When the water volume in the water storage tank reaches a preset threshold, the weight of the water presses down on the load-bearing plate, causing the regulating pipe to move down synchronously, gradually blocking the seepage holes, so that the water can only flow directly into the underground main discharge pipe.

[0006] Furthermore, the closing assembly includes a buoyancy plate, a baffle, and a connecting frame. A sliding rod is provided inside the water storage tank. The buoyancy plate is slidably mounted on the sliding rod. A groove is provided at one end of the water storage tank near the outlet. The baffle is slidably mounted in the groove, and when the baffle is at the bottom of the groove, it blocks the outlet. The upper ends of the buoyancy plate and the baffle are connected by the connecting frame to move synchronously.

[0007] Furthermore, a connecting seat is provided at the front end of the baffle, a connecting block is hinged on the connecting seat, and a gear is sleeved at the end of its rotating shaft. A corresponding rack is provided on the front face of the water storage tank. A cover plate is provided on the connecting block. When the baffle moves up, the gear rolls along the rack, driving the connecting block to rotate, causing the cover plate to flip from a vertical state to a horizontal state.

[0008] Furthermore, the front end of the connecting block is provided with a sliding plate, the rear end face of the cover plate is provided with a slot, the sliding plate is slidably connected to the slot, the front left and right sides of the water storage tank are provided with arc-shaped guide frames, and the two ends of the cover plate are provided with guide members, which are slidably engaged with the arc-shaped guide frames.

[0009] Furthermore, drainage channels are provided on both the left and right sides of the top of the baffle plate, and guide channels are provided on both sides of the middle of the baffle plate. One end of the guide channel is connected to the drainage channel on the same side and extends to the corresponding discharge port position. A seepage section is provided in the middle of the drainage channel. The seepage section has a semi-elliptical structure, and several seepage ports are provided at equal intervals on its upper part. The seepage ports are at a certain distance from the bottom of the drainage channel.

[0010] Furthermore, the drainage channel is provided with several anchoring holes, and a downwardly extending fixing rod is installed in the anchoring holes.

[0011] The present invention also provides a cavity defect detection device, applied to the above-mentioned high embankment roadbed slope of highway, including a vehicle-mounted support, a support base is provided on the side end of the vehicle-mounted support, a support arm is rotatably mounted on the support base, and a first motor for driving the support arm to rotate vertically is provided on the support base. An installation arm is rotatably mounted on the other end of the support arm, and a second motor for driving the installation arm to rotate horizontally is provided on the support arm. A ground-penetrating radar module group is assembled on the installation arm for scanning the preset path of the drainage pipe and the underground main discharge pipe before and after construction.

[0012] Furthermore, guide rods are provided on both sides of the top of the vehicle-mounted support, and the support seat is slidably mounted on the guide rods. A telescopic cylinder is provided on the vehicle-mounted support, and the piston rod of the telescopic cylinder is connected to the support seat to drive it to perform lifting and lowering movements.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves bidirectional optimization of slope water and soil protection through the coordinated design of the support plate and drainage mechanism. During heavy rain, the support plate physically blocks rainwater from eroding the surface soil, while the drainage channel and guide channel quickly collect water and direct it to the discharge outlet. After the water level in the storage tank reaches the threshold, the regulating pipe blocks the seepage holes, and the water is quickly discharged through the underground main discharge pipe, avoiding landslides caused by shallow soil saturation and instability. During light rain, the seepage holes of the drainage pipe and the opening of the support plate form a "dual water replenishment channel," which, together with the seepage part of the drainage channel, slowly replenishes water and prevents the soil from drying and cracking. This not only solves the pain points of traditional slopes, such as "water loss during heavy rain and cracking during light rain," but also maintains the integrity and stability of the soil.

[0014] The closure assembly automatically controls the opening and closing of the discharge outlet via a buoyancy plate based on the water level. During light rain, the discharge outlet is closed to ensure water replenishment, while during heavy rain, it is opened to assist drainage, requiring no manual intervention. The cover plate adopts a composite motion of "flipping + horizontal movement." Under the constraint of the arc-shaped guide frame, it first flips at the front of the water storage tank (avoiding the vertical space of plants) and then moves horizontally to cover the opening. This not only prevents heavy rain from impacting the soil at the opening but also prevents tall plants from obstructing the movement of the cover plate or causing damage, achieving synergistic compatibility between "structural protection" and "biological slope stabilization." At the same time, the design of the sliding plate and guide components ensures that the structure operates without jamming, improving long-term reliability.

[0015] The cavity detection device uses a telescopic cylinder to adjust the height and dual motors to control the support arm and installation arm angle, enabling the ground radar module group to achieve full-range coverage detection of drainage pipes, underground main drainage pipes, and the roadbed. Before and after construction or during regular maintenance, it can scan the area around the pipeline and the entire roadbed in different regions, compare the images with the baseline image to accurately locate cavities, and repair them in a timely manner through grouting, reinforcement, and other measures. This not only prevents drainage failure caused by cavities around the pipeline, but also prevents structural collapse caused by cavities inside the roadbed, providing dual protection for the safety of the roadbed slope and drainage system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the support baffle structure of the present invention; Figure 2 This is a schematic diagram of the support baffle of the present invention under heavy rain conditions; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 A schematic diagram of the slope layout for the retaining wall; Figure 5 for Figure 4 Enlarged view of a section at point B in the middle; Figure 6 This is a partial schematic diagram of the drainage channel of the present invention; Figure 7 This is a schematic diagram of the structure of a cavity disease detection device; Figure 8 This is a schematic diagram showing the working status of the cavity detection device.

[0017] In the diagram, the components are: baffle plate-1, opening-2, water tank-3, load-bearing plate-4, drain pipe-5, regulating pipe-6, discharge port-7, spring-8, main discharge pipe-9, seepage hole-10, buoyancy plate-11, baffle plate-12, connecting frame-13, slide rod-14, connecting seat-15, connecting block-16, gear-17, rack-18, cover plate-19, sliding plate-20, slot-21, arc-shaped guide frame-22, guide component-23, drain channel-24, guide channel-25, seepage part-26, seepage port-27, anchor hole-28, fixing rod-29, vehicle-mounted support-30, support seat-31, support arm-32, first motor-33, mounting arm-34, second motor-35, ground-penetrating radar module group-36, and guide rod-37. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 8 As shown, a high embankment slope for a highway includes several baffles 1 equidistantly arranged along the slope surface. Two adjacent baffles 1 are arranged close to each other. The lower part of the baffle 1 has an opening 2 to ensure the growth space for vegetation on the slope. The upper part of the baffle 1 is provided with a drainage mechanism. The drainage mechanism includes a water storage tank 3, a load-bearing plate 4, a drainage pipe 5, a regulating pipe 6, and a closing component. The water storage tank 3 is inclined and embedded in the upper part of the baffle 1. Several discharge ports 7 are opened at the end of the water storage tank 3 near the opening 2. The closing component is movably arranged in the water storage tank 3 and can automatically control the opening and closing of the discharge ports 7 according to the water level changes in the water storage tank 3. The baffles 1, evenly spaced along the slope, directly resist the scouring force of heavy rain on the surface soil through physical blocking, preventing soil from being carried away by rainwater and reducing soil erosion at the source. At the same time, the arrangement of the baffles 1 can disperse the flow path of rainwater on the slope, reduce the intensity of local water scouring, and further protect the soil structure of the slope. The openings 2 at the bottom of the baffles 1 not only provide growth space for the roots of slope plants (roots assist in soil stabilization), but also, in conjunction with the seepage structure of the drainage mechanism, allow water to infiltrate into the surface and shallow soil layers during light rain, replenishing soil moisture. This prevents the soil from drying and cracking due to prolonged drought, maintains soil integrity, and prevents cracks from developing and causing a decrease in slope stability.

[0020] The load-bearing plate 4 is slidably assembled inside the water storage tank 3. Several springs 8 are connected to the bottom of the load-bearing plate 4 and the bottom of the water storage tank 3, and its side is in contact with the inner wall of the water storage tank 3. The drain pipe 5 is connected to the bottom of the water storage tank 3, and the other end of the drain pipe 5 extends to connect with the underground discharge main pipe 9. The regulating pipe 6 is slidably embedded in the drain pipe 5, and its upper end extends to connect with the middle of the load-bearing plate. Several seepage holes 10 are opened on the upper outer circumference of the drain pipe 5. When the water volume in the water storage tank 3 reaches the preset threshold, the weight of the water presses down on the load-bearing plate 4, causing the regulating pipe 6 to move down synchronously, gradually blocking the seepage holes 10, so that the water can only flow directly into the underground discharge main pipe 9.

[0021] During light rain, the water storage tank 3 is tilted and embedded to collect rainwater from the slope. When the water volume is small, the water is slowly discharged through the drain pipe 5. At the same time, the seepage hole 10 at the top of the drain pipe 5 allows some water to seep into the shallow soil of the slope, forming a "double water replenishment channel" with the opening 2 of the support plate 1. This ensures that the rainwater fully replenishes the soil and prevents the soil from shrinking and cracking under long-term dry conditions, thus avoiding the formation of through cracks.

[0022] When encountering heavy rain, the large amount of rainfall causes the rate at which water drains from the storage tank 3 to be less than the rate at which rainwater enters. When the water level in the storage tank 3 reaches a preset threshold, the weight of the water will overcome the elastic force of the spring 8 and press down on the load-bearing plate 4, causing the regulating pipe 6 to move down simultaneously and block the seepage hole 10. This prevents the water flowing into the drainage pipe 5 from draining into the shallow soil through the seepage hole 10, thus avoiding a large amount of water continuously seeping into the shallow soil during heavy rain. This would prevent the soil moisture content from rapidly exceeding the saturation threshold. Once saturated, the pores between the shallow soil particles are filled with water, significantly reducing the friction between particles and greatly decreasing the shear strength. This makes the soil unable to withstand the lateral pressure of the upper soil, easily leading to shallow landslides or collapses and damaging the overall slope structure. At this time, all the water is quickly discharged through the drainage pipe 5 and the underground discharge main pipe 9, reducing the time that rainwater stays on the slope and preventing excessive lateral pressure from rainwater accumulation on the support plate 1, thus minimizing the risk of soil erosion and loss due to heavy rain.

[0023] In this embodiment, the closing assembly includes a buoyancy plate 11, a baffle 12, and a connecting frame 13. A sliding rod 14 is provided inside the water storage tank 3. The buoyancy plate 11 is slidably mounted on the sliding rod 14. A groove is provided at one end of the water storage tank 3 near the opening 2. The baffle 12 is slidably mounted in the groove, and when the baffle 12 is at the bottom of the groove, it blocks the discharge port 7. The upper ends of the buoyancy plate 11 and the baffle 12 are connected by the connecting frame 13 to move synchronously. When the water level in the water storage tank 3 is low (in a light rain scenario), the buoyancy plate 11 slides down the sliding rod 14, and the connecting frame 13 drives the baffle 12 to block the discharge port 7. This prevents a small amount of replenishing water from being lost through the discharge port 7, ensuring that the water can infiltrate into the soil through the seepage holes 10, fully replenishing the moisture and preventing the soil from drying out. When the water level rises to the threshold (rainstorm scenario), the buoyancy is greater than the gravity, causing the buoyancy plate 11 to move upward, which drives the baffle 12 to open the discharge port 7; excess water in the water storage tank 3 is quickly discharged through the discharge port 7, reducing the amount of water stored in the water storage tank 3, preventing excessive water from overflowing from the side, and working together with the drain pipe 5 to quickly drain water.

[0024] In this embodiment, a connecting seat 15 is provided at the front end of the baffle 12, a connecting block 16 is hinged on the connecting seat 15, and a gear 17 is sleeved at the end of its rotating shaft. A corresponding rack 18 is provided on the front end face of the water storage tank 3. A cover plate 19 is provided on the connecting block 16. When the baffle 12 moves upward with the buoyancy plate 11 (in a rainstorm scenario), the gear 17 rolls along the rack 18, causing the connecting block 16 to rotate, so that the cover plate 19 flips from a vertical state to a horizontal state; the horizontal cover plate 19 can cover the opening 2 at the bottom of the support baffle 1, preventing a large amount of rainwater from directly impacting the plant roots and soil at the opening 2 during rainstorms, thus avoiding soil erosion.

[0025] In this embodiment, the front end of the connecting block 16 is provided with a sliding plate 20, the rear end face of the cover plate 19 is provided with a slot 21, the sliding plate 20 is slidably connected to the slot 21, the front left and right sides of the water tank 3 are provided with arc-shaped guide frames 22, and the two ends of the cover plate 19 are provided with guide members 23, which are slidably engaged with the arc-shaped guide frames 22.

[0026] When the cover plate 19 is flipped to a near-horizontal state, as the baffle 12 continues to move upward, the guide 23 will gradually enter the horizontal section of the arc-shaped guide frame 22 and move outward along the horizontal trajectory (away from the water tank 3 and towards the opening 2), driving the cover plate 19 to achieve horizontal displacement simultaneously. Finally, under the synergistic effect of "flipping to a horizontal position + moving outward horizontally", the cover plate 19 moves precisely to directly above the opening 2, forming a complete cover. The advantage of the two-stage movement is that the cover plate 19 completes the posture transformation at the front end of the water tank 3, away from the plants at the opening 2, and the flipping trajectory completely avoids the vertical growth space of the plants (such as plant stems and canopies), avoiding collisions or squeezing with taller plants during the flipping process, preventing damage to the plants or the cover plate 19 from being stuck. In the second step of the horizontal movement stage, the cover plate 19 is already in a horizontal position, and only needs to move horizontally to cover the opening 2, without having to cross the vertical height of the plants. Even if the plants at the opening 2 are tall (such as shrubs and herbaceous plants with good root soil fixation), the horizontal movement will not be blocked by the plants, and it can finally accurately reach directly above the opening 2.

[0027] In this embodiment, drainage channels 24 are provided on both the left and right sides of the top of the support plate 1, and guide channels 25 are provided on both sides of the middle of the support plate 1. One end of the guide channel 25 is connected to the drainage channel 24 on the same side and extends to the corresponding discharge port 7. A seepage section 26 is provided in the middle of the drainage channel 24. The seepage section 26 has a semi-elliptical structure and several seepage ports 27 are provided at equal intervals on its upper part. There is a certain distance between the seepage port 27 and the bottom of the drainage channel. Several anchoring holes 28 are provided on the drainage channel 24. A downwardly extending fixing rod 29 is installed in the anchoring hole 28. The fixing rod 29 is inserted into the deep soil of the slope. Through the friction and interlocking force between the fixing rod 29 and the deep soil, the rainstorm scouring force and soil lateral pressure borne by the support plate 1 are transmitted to the deep stable soil. This prevents the support plate 1 from tilting or displacing under the impact of rainstorm.

[0028] The drainage channel 24 at the top of the baffle plate 1 collects rainwater from the top of the slope, and the guide channels 25 on both sides of the middle section accurately transport the rainwater in the drainage channel 24 to the discharge outlet 7; this prevents rainwater from flowing randomly on the slope and forming "scour runoff", reducing the direct scouring of the slope soil by rainwater, and working together with the physical barrier of the baffle plate 1 to reduce soil erosion; the semi-elliptical seepage section 26 in the middle of the drainage channel has a seepage outlet 27 (with a very small aperture) at the top. When the water flowing in the drainage channel flows, a small amount of water will flow into the surface layer of the slope soil through the seepage outlet 27, forming a "three-dimensional water replenishment network" together with the opening 2 of the baffle plate 1 and the seepage holes 10 of the drainage pipe 5, which fully replenishes the soil moisture and prevents the soil from drying and cracking.

[0029] This embodiment also provides a cavity detection device, including a vehicle-mounted support 30. Guide rods 37 are provided on both sides of the top of the vehicle-mounted support 30. A support seat 31 is slidably mounted on the guide rods 37. A telescopic cylinder is provided on the vehicle-mounted support 30. The piston rod of the telescopic cylinder is connected to the support seat 31 to drive it to move up and down. A support arm 32 is rotatably mounted on the support seat 31. A first motor 33 is provided on the support seat 31 to drive the support arm 32 to rotate in the vertical direction. An installation arm 34 is rotatably mounted on the other end of the support arm 32. A second motor 35 is provided on the support arm 32 to drive the installation arm 34 to rotate in the horizontal direction. A ground-penetrating radar module group 36 is mounted on the installation arm 34 to scan the preset path of the drainage pipe 5 and the underground discharge main pipe 9 before and after construction. Guide rods 37 are provided on both sides of the top of the vehicle support 30. The support seat 31 is slidably mounted on the guide rods 37. A telescopic cylinder is provided on the vehicle support 30. The piston rod of the telescopic cylinder is connected to the support seat 31 to drive it to move up and down.

[0030] On the support base 31 at the side end of the vehicle-mounted support 30, the first motor 33 drives the support arm 32 to rotate in the vertical direction, which can adjust the pitch angle of the support arm 32; the second motor 35 on the support arm 32 drives the mounting arm 34 to rotate in the horizontal direction, which can adjust the horizontal rotation angle of the mounting arm 34; through the coordinated control of the first motor 33 and the second motor 35, the ground radar module group 36 on the mounting arm 34 can be adjusted to any preset angle to ensure that the radar signal can cover the preset path of the drain pipe 5 and the underground discharge main pipe 9.

[0031] The guide rods 37 on both sides of the top of the vehicle-mounted support 30 provide sliding guidance for the support seat 31. The piston rod of the telescopic cylinder on the vehicle-mounted support 30 is connected to the support seat 31. When it is necessary to adjust the detection height, the piston rod of the telescopic cylinder extends or retracts, causing the support seat 31 to slide up and down along the guide rods 37. The lifting and lowering of the support seat 31 synchronously drives the support arm 32, the mounting arm 34 and the ground radar module group 36 to lift and lower, which can adapt to the roadbed detection needs at different heights, ensure that the ground radar module group 36 maintains the best detection distance with the detection target, and improve the detection accuracy.

[0032] The working steps of the device are as follows: Before or after construction or during regular maintenance, the vehicle-mounted support 30 is installed on the engineering vehicle and moved with the vehicle to the testing section. The testing mode is set according to the testing target (drainage pipe 5 / underground discharge main pipe 9 / roadbed).

[0033] Regional detection: ① Inspection of drainage pipe 5 and underground main drainage pipe 9: Adjust the height of the telescopic cylinder, the first motor 33 (support arm 32 pitch) and the second motor 35 (installation arm 34 rotates horizontally) to make the radar module group 36 align with the preset path of the pipeline and scan whether there are cavities in the soil around the pipeline; ② Roadbed void detection: Adjust the support arm 32 to cover the top surface of the roadbed, the slope filling layer, the junction of the roadbed and the base layer, etc., raise and lower the support base 31 to the appropriate height, and the radar module group 36 emits electromagnetic waves to the entire roadbed area to capture the reflected wave signals of the voids inside the roadbed; Data comparison and hazard assessment: The scanned image data of the relevant area of ​​drainage pipe 5 and the entire roadbed are compared with the baseline image and design parameters (such as the radar wave characteristics corresponding to the roadbed compaction) before construction. If abnormal reflection areas are found, the voids around drainage pipe 5 or the voids inside the roadbed can be accurately located, and a repair plan (such as roadbed grouting and filling, drainage pipe 5 reinforcement, etc.) can be formulated in a timely manner to ensure the dual safety and stability of the roadbed structure and drainage system.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slope for a high embankment subgrade of a highway, characterized in that: The system includes several support plates evenly spaced along the slope, with adjacent support plates positioned close to each other. Each support plate has an opening at its lower part to ensure sufficient space for the growth of vegetation on the slope. The upper part of each support plate is equipped with a drainage mechanism, which includes a water tank, a load-bearing plate, a drainage pipe, a regulating pipe, and a closing assembly. The water tank is inclined and embedded in the upper part of the support plate. Several discharge ports are located at the end of the water tank near the opening. The closing assembly is movably disposed within the water tank and can automatically control the opening and closing of the discharge ports according to changes in the water level within the tank. The load-bearing plate is slidably assembled inside the water storage tank. Several springs connect the load-bearing plate to the bottom of the water storage tank, and its side is in contact with the inner wall of the water storage tank. The drain pipe is connected to the bottom of the water storage tank, and the other end of the drain pipe extends to connect with the underground main discharge pipe. The regulating pipe is slidably embedded in the drain pipe, and its upper end extends to connect with the middle of the load-bearing plate. Several seepage holes are opened on the upper outer circumference of the drain pipe. When the water volume in the water storage tank reaches a preset threshold, the weight of the water presses down on the load-bearing plate, causing the regulating pipe to move down synchronously, gradually blocking the seepage holes, so that the water can only flow directly into the underground main discharge pipe.

2. The high embankment slope of a highway as described in claim 1, characterized in that: The closing assembly includes a buoyancy plate, a baffle, and a connecting frame. A sliding rod is provided inside the water storage tank. The buoyancy plate is slidably mounted on the sliding rod. A groove is provided at one end of the water storage tank near the outlet. The baffle is slidably mounted in the groove, and when the baffle is at the bottom of the groove, it blocks the outlet. The upper ends of the buoyancy plate and the baffle are connected by the connecting frame to move synchronously.

3. A highway high embankment slope according to claim 2, characterized in that: The front end of the baffle is provided with a connecting seat, and a connecting block is hinged on the connecting seat. A gear is sleeved on the end of the rotating shaft of the connecting block. A corresponding rack is provided on the front end face of the water storage tank. A cover plate is provided on the connecting block. When the baffle moves up, the gear rolls along the rack, driving the connecting block to rotate, so that the cover plate flips from a vertical state to a horizontal state.

4. A highway high embankment slope according to claim 3, characterized in that: The front end of the connecting block is provided with a sliding plate, and the rear end face of the cover plate is provided with a slot. The sliding plate is slidably connected to the slot. The front left and right sides of the water storage tank are provided with arc-shaped guide frames, and the two ends of the cover plate are provided with guide members, which are slidably engaged with the arc-shaped guide frames.

5. A highway high embankment slope according to claim 1, characterized in that: The top left and right sides of the support plate are provided with drainage channels, and the middle two sides of the support plate are provided with guide channels. One end of the guide channel is connected to the drainage channel on the same side and extends to the corresponding discharge port. The middle of the drainage channel is provided with a seepage section. The seepage section has a semi-elliptical structure and several seepage ports are equidistantly provided on its upper part. The seepage ports are at a certain distance from the bottom of the drainage channel.

6. A highway high embankment slope according to claim 5, characterized in that: The drainage channel has several anchoring holes, and a downward-extending fixing rod is installed in each anchoring hole.

7. A cavity defect detection device, applied to the high embankment slope of a highway as described in claim 1, characterized in that: The system includes a vehicle-mounted support, a support base at one side of the vehicle-mounted support, a support arm rotatably mounted on the support base, and a first motor mounted on the support base for driving the support arm to rotate vertically. An installation arm is rotatably mounted on the other end of the support arm, and a second motor mounted on the support arm for driving the installation arm to rotate horizontally. A ground-penetrating radar module is mounted on the installation arm for scanning the pre-set path of the drainage pipe and the underground main discharge pipe before and after construction.

8. The cavity detection device according to claim 7, characterized in that: Guide rods are provided on both sides of the top of the vehicle-mounted support. The support seat is slidably mounted on the guide rods. A telescopic cylinder is provided on the vehicle-mounted support. The piston rod of the telescopic cylinder is connected to the support seat to drive it to move up and down.

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