A pavement water damage and anti-seepage performance simulation test device

Abstract

The present invention discloses a pavement water damage and anti-seepage performance simulation test device, which belongs to the field of pavement performance testing. A pavement water damage and anti-seepage performance simulation test device includes a test bench, a mounting frame is fixedly connected to the top of the test bench, a liquid collecting tank is provided on the top of the test bench, and a reciprocating screw is rotatably connected between the inner walls of the two sides of the mounting frame, a movable plate is threadedly sleeved on the reciprocating screw, the top of the movable plate and the bottom of the mounting frame are fitted and slid, and a rolling part for simulating the pressure of the pavement and a spraying assembly are arranged at the bottom of the movable plate, and the spraying assembly is arranged on the mounting frame, and the spraying assembly is used for simulating the water flow flushing of the pavement; the present invention generates rolling, water spraying and vibration effects on the surface of the pavement sample respectively through the arrangement of structures such as rolling rollers, vibration plates and water spray boxes, so as to simulate a more realistic pavement condition, thereby improving the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of pavement performance testing, and in particular to a pavement water damage and anti-seepage performance simulation testing device. Background Art

[0002] Water resistance refers to the ability of a material or structure to resist liquid penetration, while water damage performance describes the durability and stability of road materials and structures in the face of water intrusion. Therefore, it is very important to conduct water damage and water resistance tests on pavement, as these tests can help evaluate and ensure the durability and safety of roads in the face of water intrusion.

[0003] At present, the existing testing devices have poor simulation effects when conducting pavement water damage and anti-seepage performance simulation tests, and it is difficult to reflect the actual pavement use environment, which leads to reduced accuracy of the test results; and water penetration into the pavement is a relatively slow process, which consumes a lot of time in actual simulation tests, thereby reducing the test efficiency. Therefore, a pavement water damage and anti-seepage performance simulation test device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the simulation test effect is poor, it is difficult to reflect the actual road use environment, resulting in reduced accuracy of the test results, and in the existing tests, the water flow penetrates the road surface relatively slowly, resulting in a long test time and reduced test efficiency. A pavement water damage and anti-seepage performance simulation test device is proposed to solve the problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for simulating testing the water damage and anti-seepage performance of a road surface comprises a test bench, a mounting frame is fixedly connected to the top of the test bench, a liquid collecting tank is provided on the top of the test bench, and a reciprocating screw is rotatably connected between the inner walls on both sides of the mounting frame, wherein a movable plate is threadedly sleeved on the reciprocating screw, the top of the movable plate fits and slides with the bottom of the mounting frame, and a rolling part for simulating the pressure of the road surface is provided at the bottom of the movable plate; a spraying assembly is arranged on the mounting frame, and the spraying assembly is used for performing a water flow scouring simulation test on the road surface.

[0007] In order to improve the representativeness of the test results, preferably, the rolling part includes a positioning plate, the positioning plate is fixed at the bottom of the movable plate, both sides of the bottom of the positioning plate are fixedly connected with electric push rods, the bottoms of the telescopic ends of the two groups of electric push rods are fixedly connected with bending plates, and rolling rollers are rotatably connected between the two sides of the inner walls of the bending plates, and a driving motor is fixedly connected to the side wall of the mounting frame, and the output shaft of the driving motor is fixedly connected to the end of the reciprocating screw rod.

[0008] Furthermore, a hollow groove is opened in the rolling roller, and a positioning shaft is rotatably connected to the middle part of the inner cavity of the hollow groove, and both ends of the positioning shaft pass through the rolling roller and are fixedly connected to the side walls of the positioning plate, and vibration grooves are opened on both sides of the hollow groove, and a vibration plate is slidably connected in the vibration groove, and a first magnetic plate is fixedly connected to the side of the vibration plate close to the hollow groove, and a first spring is fixedly connected between the other side of the vibration plate and the inner wall of the vibration groove, and second magnetic plates are fixedly connected to both sides of the outer wall of the positioning shaft, and the second magnetic plate and the first magnetic plate magnetically repel each other.

[0009] In order to improve the accuracy of the test results, preferably, the spray assembly includes a water collecting pipe, which is fixed between the inner walls on both sides of the bending plate, and the top of the mounting frame is fixedly connected to a water tank, and both sides of the bottom of the water tank are fixed and connected with water pipes, and the other end of the water pipe is connected to the inner cavity of the water collecting pipe, and both sides of the water collecting pipe are fixed and connected with water spray boxes, and two groups of the water spray boxes are symmetrically arranged along the center of the rolling roller, and water spray holes are evenly spaced at the bottom of the water spray boxes, and a switching part for adjusting the direction of water flow is provided between the two groups of the water spray boxes.

[0010] In order to facilitate the reversal of water flow spraying, the switching part further includes two groups of switching boxes, the two groups of switching boxes are respectively fixed on the water spray boxes on both sides, and the connected switching boxes are connected to the inner cavity of the water spray boxes, and switching plates are slidingly fitted in the two groups of switching boxes, and conducting grooves are provided on the switching plates in the switching boxes on both sides.

[0011] In order to improve the water flushing efficiency, preferably, a piston box is fixedly connected to the side wall of the mounting frame, a piston plate is slidably connected to the lower part of the inner cavity of the piston box, a second spring is fixedly connected between the bottom of the piston plate and the bottom of the inner cavity of the piston box, the end of the reciprocating screw extends through the piston box, a third magnetic plate is fixedly connected to the reciprocating screw located in the piston box, and the third magnetic plate and the piston plate are magnetically repelled from each other, the lower part of the side wall of the piston box is fixed and connected to the first air pipe, the other end of the first air pipe is connected to the top of the inner cavity of the water tank, and a one-way valve is provided in the first air pipe.

[0012] In order to accelerate the water penetration rate, further, a negative pressure groove is opened at the bottom of the test bench, and a plurality of filter holes are opened at the top center of the test bench, and the filter holes are connected with the inner cavity of the negative pressure groove; a T-shaped stage is fixedly connected to the bottom of the inner cavity of the negative pressure groove; the connecting rod of the T-shaped stage is hollow, and the hollow top of the T-shaped stage connecting rod is connected with the inner cavity of the negative pressure groove; the bottom of the piston box is fixed and connected with a second air pipe, the other end of the second air pipe is connected with the hollow bottom end of the T-shaped stage connecting rod, and a one-way valve is arranged in the second air pipe.

[0013] In order to facilitate the discharge of water, preferably, a drainage groove is opened in the test bench, the bottom of the side wall of the drainage groove is fixed and connected to a drainage pipe, the bottom of the side wall of the negative pressure groove is connected to the inner cavity of the drainage groove through a horizontal groove, the bottom of the liquid collecting tank is connected to the inner cavity of the drainage groove through a vertical groove, and solenoid valves are provided in the horizontal groove and the vertical groove.

[0014] In order to improve the suction and thrust of the airflow, preferably, sealing rings are fixedly connected on both sides of the rolling roller, an air guide ring is slidably connected inside the sealing ring, the air guide ring is fixedly connected to the inner wall of the bending plate, the vibration groove is connected to the inner cavity of the sealing ring, the sealing ring is connected to the inner cavity of the air guide ring, a third air pipe is fixedly connected between the side wall of the bending plate and the top of the water tank, the two ends of the third air pipe are respectively connected to the inner cavity of the air guide ring and the top of the water tank, a fourth air pipe is fixed on and connected to the outer wall of the third air pipe, the other end of the fourth air pipe is connected to the hollow inner cavity of the T-shaped stage connecting rod, and a one-way valve is provided on the side of the third air pipe close to the water tank and in the fourth air pipe.

[0015] In order to facilitate the comparison of the quality before and after the road surface test, preferably, an optical detector is fixedly connected to the inner wall of the mounting frame, and the detection end of the optical detector faces the center of the test bench.

[0016] Compared with the prior art, the present invention provides a pavement water damage and anti-seepage performance simulation test device, which has the following beneficial effects:

[0017] 1. The pavement water damage and anti-seepage performance simulation test device, through the setting of structures such as rolling rollers, vibration plates and water spray boxes, produces rolling, water spraying and vibration effects on the surface of the pavement sample, so as to simulate a more realistic pavement condition, thereby improving the accuracy of the test results.

[0018] 2. The pavement water damage and anti-seepage performance simulation test device, through the repulsive effect of the third magnetic plate and the piston plate, and in conjunction with the setting of the second spring, first accelerates the downward spraying speed of the water flow in the water spray box, and then generates suction in the negative pressure tank located below the pavement sample, so that the water flow can penetrate the pavement sample faster, shortening the time required for the water flow to penetrate the pavement sample, reducing the time required for the anti-seepage test, and improving the test efficiency.

[0019] 3. The pavement water damage and anti-seepage performance simulation test device, through the repulsive action of the first magnetic plate and the second magnetic plate, cooperates with the setting of the first spring, while realizing pavement vibration simulation, further increases the pressure in the water tank and the suction in the negative pressure tank, further accelerates the speed of water flow penetrating the pavement sample, thereby further improving the detection efficiency.

[0020] 4. The pavement water damage and anti-seepage performance simulation test device, through the setting of the switching box, the switching plate and the conduction groove, only allows the water spray box located in front of the moving direction of the rolling roller to spray water, so that the rolling roller can better squeeze and penetrate the water into the pavement sample, accelerate the water flow penetration speed, and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a pavement water damage and anti-seepage performance simulation test device proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of a front view and half-section structure of a pavement water damage and anti-seepage performance simulation test device proposed by the present invention;

[0023] Figure 3 A pavement water damage and anti-seepage performance simulation test device proposed by the present invention Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0024] Figure 4 A schematic diagram of the internal structure of a rolling roller of a pavement water damage and anti-seepage performance simulation test device proposed by the present invention;

[0025] Figure 5 A pavement water damage and anti-seepage performance simulation test device proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0026] Figure 6 A schematic diagram of a side view of a half-section structure of a pavement water damage and anti-seepage performance simulation test device proposed by the present invention;

[0027] Figure 7 A pavement water damage and anti-seepage performance simulation test device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of the middle C area;

[0028] Figure 8 A pavement water damage and anti-seepage performance simulation test device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of area D in the middle.

[0029] In the figure: 1, test bench; 2, mounting frame; 21, liquid collecting tank; 3, reciprocating screw; 31, moving plate; 4, positioning plate; 41, electric push rod; 42, bending plate; 43, rolling roller; 431, hollow groove; 44, positioning shaft; 441, second magnetic plate; 45, vibration groove; 451, vibration plate; 452, first magnetic plate; 453, first spring; 46, driving motor; 5, water collecting pipe; 51, water storage tank; 52, water guide pipe; 53, water spray Box; 531, water spray hole; 54, switching box; 55, switching plate; 551, conduction groove; 6, piston box; 61, piston plate; 62, second spring; 63, third magnetic plate; 64, first air pipe; 7, negative pressure groove; 71, T-shaped table; 72, second air pipe; 8, drainage groove; 81, drainage pipe; 82, horizontal groove; 83, vertical groove; 9, sealing ring; 91, air guide ring; 92, third air pipe; 93, fourth air pipe; 10, optical detector. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Example:

[0033] Reference Figure 1-Figure 8 A pavement water damage and anti-seepage performance simulation test device includes a test bench 1, a mounting frame 2 is fixedly connected to the top of the test bench 1, a liquid collecting tank 21 is opened on the top of the test bench 1, and also includes a reciprocating screw 3, the reciprocating screw 3 is rotatably connected between the inner walls on both sides of the mounting frame 2, wherein a movable plate 31 is threadedly sleeved on the reciprocating screw 3, the top of the movable plate 31 fits and slides with the bottom of the mounting frame 2, and the bottom of the movable plate 31 is provided with a rolling part for simulating the pressure of the pavement; a spraying assembly, the spraying assembly is arranged on the mounting frame 2, and the spraying assembly is used to perform a water flow scouring simulation test on the pavement.

[0034] Reference Figure 4-Figure 7The rolling part includes a positioning plate 4, which is fixed to the bottom of the moving plate 31. Both sides of the bottom of the positioning plate 4 are fixedly connected with electric push rods 41. The bottoms of the telescopic ends of the two sets of electric push rods 41 are fixedly connected with bending plates 42. The inner walls of the bending plates 42 are rotatably connected with rolling rollers 43. The side walls of the mounting frame 2 are fixedly connected with a driving motor 46. The output shaft of the driving motor 46 is fixedly connected to the end of the reciprocating screw rod 3. A hollow groove 431 is opened in the rolling roller 43. The middle part of the inner cavity of the hollow groove 431 is rotatably connected with a positioning Shaft 44, both ends of the positioning shaft 44 pass through the rolling roller 43 and are fixedly connected to the side walls of the positioning plate 4, vibration grooves 45 are opened on both sides of the hollow groove 431, and a vibration plate 451 is slidably connected in the vibration groove 45, and a first magnetic plate 452 is fixedly connected to one side of the vibration plate 451 close to the hollow groove 431, and a first spring 453 is fixedly connected between the other side of the vibration plate 451 and the inner wall of the vibration groove 45, and second magnetic plates 441 are fixedly connected to both sides of the outer wall of the positioning shaft 44, and the second magnetic plate 441 and the first magnetic plate 452 repel each other magnetically.

[0035] By setting the above structure, when the rolling roller 43 moves to above the road surface sample, the electric push rod 41 extends downward, so that the rolling roller 43 is attached to the surface of the road surface sample, and then under the rotation of the reciprocating screw 3, the rolling roller 43 will continuously move back and forth along the surface of the road surface sample, thereby applying pressure to the road surface sample, and under the action of friction, the rolling roller 43 will rotate around the positioning shaft 44, at this time, through the repulsion of the first magnetic plate 452 and the second magnetic plate 441, when the two are in the repulsive area, the first magnetic plate 452 will push the vibration plate 451 to compress the side of the first spring 453 to move, so as to compress and accumulate force for the first spring 453, when the first magnetic plate 452 and the first magnetic plate 452 are separated from the repulsive area, under the rebound action of the first spring 453, the vibration plate 451 will quickly rebound and hit the inner wall of the vibration groove 45, thereby generating a vibration effect on the surface of the road surface sample, and the above rolling and vibration methods can simulate a more realistic road condition, thereby improving the accuracy of the test results.

[0036] Reference Figure 1 , Figure 6 , Figure 7 and Figure 8The spray assembly includes a water collecting pipe 5, which is fixed between the inner walls of the two sides of the bending plate 42. The top of the mounting frame 2 is fixedly connected with a water storage tank 51. The bottom of the water storage tank 51 is fixed on both sides and connected with a water guide pipe 52. The other end of the water guide pipe 52 is connected with the inner cavity of the water collecting pipe 5. The water guide pipe 52 is provided with a solenoid valve for controlling its opening and closing. The two sides of the water collecting pipe 5 are fixed and connected with a water spray box 53. Two groups of water spray boxes 53 are connected along the rolling roller 43. The two water spray boxes 53 are symmetrically arranged, and water spray holes 531 are evenly spaced at the bottom ends. A switching part for adjusting the direction of water flow is provided between the two groups of water spray boxes 53; the switching part includes two groups of switching boxes 54, and the two groups of switching boxes 54 are respectively fixed on the water spray boxes 53 on both sides, and the connected switching boxes 54 are connected to the inner cavity of the water spray boxes 53, and switching plates 55 are slidingly fitted in the two groups of switching boxes 54, and conducting grooves 551 are provided on the switching plates 55 in the switching boxes 54 on both sides.

[0037] By setting the above structure, the solenoid valve in the water pipe 52 is opened. At this time, the water flow in the water tank 51 will enter the water pipe 52 along the water pipe 52, and then be sprayed downward to the surface of the road surface sample by the water spray box 53. Whenever the rolling roller 43 moves to the end of the road surface sample, the switching plate 55 side will contact the inner wall of the mounting frame 2, thereby pushing the switching plate 55 to slide along the two sets of switching boxes 54, so that the conducting groove 551 in the water spray box 53 located in front of the moving direction of the rolling roller 43 is gradually closed, and the conducting groove 551 on the other side will gradually open after the above-mentioned conducting groove 551 is closed, so that the water flow connection state in the water spray boxes 53 on both sides is switched, so that only the water spray box 53 located in front of the moving direction of the rolling roller 43 will spray water, so that the rolling roller 43 can better squeeze and penetrate the water into the road surface sample, accelerate the water flow penetration speed, and improve the test efficiency.

[0038] Reference Figure 6-Figure 8, wherein a piston box 6 is fixedly connected to the side wall of the mounting frame 2, a piston plate 61 is slidably connected to the lower part of the inner cavity of the piston box 6, a second spring 62 is fixedly connected between the bottom of the piston plate 61 and the bottom of the inner cavity of the piston box 6, the end of the reciprocating screw rod 3 extends through the piston box 6, a third magnetic plate 63 is fixedly connected to the reciprocating screw rod 3 located in the piston box 6, and the third magnetic plate 63 and the piston plate 61 are magnetically repelled, the lower part of the side wall of the piston box 6 is fixed and connected to the first air pipe 64, and the other end of the first air pipe 64 is connected to the top of the inner cavity of the water storage tank 51 , and a one-way valve is arranged in the first air pipe 64; a negative pressure groove 7 is provided at the bottom of the test bench 1, and a plurality of filter holes are provided at the top center of the test bench 1, and the filter holes are connected to the inner cavity of the negative pressure groove 7, and a T-shaped platform 71 is fixedly connected to the bottom of the inner cavity of the negative pressure groove 7, and the connecting rod of the T-shaped platform 71 is hollow, and the hollow top of the connecting rod of the T-shaped platform 71 is connected to the inner cavity of the negative pressure groove 7, and the bottom of the piston box 6 is fixed and connected to a second air pipe 72, and the other end of the second air pipe 72 is connected to the hollow bottom end of the connecting rod of the T-shaped platform 71, and a one-way valve is arranged in the second air pipe 72.

[0039] It should be noted that the one-way valve in the first air pipe 64 can only allow the gas in the piston box 6 to be filled into the water storage tank 51; the one-way valve in the second air pipe 72 can only allow the gas in the negative pressure tank 7 to be sucked into the piston box 6.

[0040] By setting the above structure, while the reciprocating screw 3 rotates, the third magnetic plate 63 and the piston plate 61 are repelled from each other. When the two are in the repelling area, the piston plate 61 will move to the side of the second spring 62 to compress the gas inside the cavity of the piston box 6, and open the one-way valve in the first air pipe 64, so that the compressed gas is filled into the water storage tank 51 along the first air pipe 64, thereby increasing the internal air pressure of the water storage tank 51, thereby pushing the water flow to spray downward from the water spray box 53 more quickly, and then generating a greater downward impact on the surface of the road surface sample; and when the third When the magnetic plate 63 and the piston plate 61 are separated from the repulsive area, the piston plate 61 will return to its original position and slide under the rebound action of the second spring 62, thereby generating suction in the cavity of the piston box 6 and opening the one-way valve in the second air pipe 72, so that the negative pressure suction is transmitted along the second air pipe 72 and the T-shaped stage 71 to the negative pressure groove 7, thereby generating suction at the bottom of the pavement sample. Combined with the above-mentioned enhanced water flow impact effect, the water flow can be accelerated to penetrate the pavement sample, thereby shortening the time required for the water flow to penetrate the pavement sample, shortening the time required for the impermeability test, and improving the test efficiency.

[0041] Reference Figure 2 , Figure 6A drainage groove 8 is provided in the test bench 1, and the bottom of the side wall of the drainage groove 8 is fixed and connected with a drainage pipe 81. The bottom of the side wall of the negative pressure groove 7 is connected to the inner cavity of the drainage groove 8 through a horizontal groove 82, and the bottom of the liquid collecting tank 21 is connected to the inner cavity of the drainage groove 8 through a vertical groove 83, and electromagnetic valves are provided in the horizontal groove 82 and the vertical groove 83.

[0042] Through the setting of the above structure, after the simulation test is completed, the solenoid valves in the horizontal groove 82 and the vertical groove 83 are controlled to open, so that the water in the drainage groove 8 and the liquid collecting groove 21 are discharged respectively, and finally the anti-seepage performance of the pavement sample is calculated according to the original water volume in the water storage tank 51.

[0043] Reference Figure 2-Figure 5 Among them, sealing rings 9 are fixedly connected to both sides of the rolling roller 43, and an air guide ring 91 is slidably connected inside the sealing ring 9. The air guide ring 91 is fixedly connected to the inner wall of the bending plate 42, and the vibration groove 45 is connected to the inner cavity of the sealing ring 9. The sealing ring 9 is connected to the inner cavity of the air guide ring 91. A third air pipe 92 is fixedly connected between the side wall of the bending plate 42 and the top of the water tank 51. The two ends of the third air pipe 92 are respectively connected to the inner cavity of the air guide ring 91 and the top of the water tank 51. A fourth air pipe 93 is fixed on the outer wall of the third air pipe 92 and is connected. The other end of the fourth air pipe 93 is connected to the hollow inner cavity of the connecting rod of the T-shaped stage 71, and a one-way valve is provided on the side of the third air pipe 92 close to the water tank 51 and in the fourth air pipe 93.

[0044] It should be noted that the one-way valve in the third air pipe 92 is arranged on a side close to the water tank 51. The one-way valve in the third air pipe 92 can only allow the gas in the vibration groove 45 to be filled into the water tank 51; the one-way valve in the fourth air pipe 93 can only allow the gas in the negative pressure groove 7 to enter the vibration groove 45.

[0045] Through the arrangement of the above structure, when the first magnetic plate 452 and the second magnetic plate 441 repel each other, the vibration plate 451 will also compress the gas in the vibration groove 45 and open the one-way valve in the third air pipe 92, so that the compressed gas enters the top of the inner cavity of the water tank 51 along the vibration groove 45, the sealing ring 9, the air guide ring 91 and the third air pipe 92, thereby further increasing the internal air pressure of the water tank 51 and further accelerating the ejection speed of the water flow. When the first magnetic plate 452 and the second magnetic plate 441 are separated from the repulsive area, the vibration plate 451 will reset and slide in the vibration groove 45, thereby also generating a negative pressure suction effect in the vibration groove 45, and opening the one-way valve in the fourth air pipe 93, so that the negative pressure suction is transmitted to the negative pressure groove 7, further accelerating the speed of water flow penetrating the pavement sample, thereby further improving the detection efficiency.

[0046] Reference Figure 1 , Figure 2, wherein an optical detector 10 is fixedly connected to the inner wall of the mounting frame 2, and the detection end of the optical detector 10 faces the center of the test bench 1. The optical detector 10 adopts existing mature technology, and the specific model may be an XUT560C ultrasonic detector, which is used to detect the quality status of the pavement sample; in this way, the pavement sample is placed in the central area of ​​the top of the test bench 1, and then the optical detector 10 is used to detect and record the initial pavement sample quality. After the simulation detection is completed, the pavement sample quality is detected again by the optical detector 10, and compared with the initial detection result, so as to obtain the damage of the pavement sample when encountering water penetration, that is, the water damage performance of the pavement.

[0047] Reference Figure 1-Figure 8 In the present invention, when in use, first place the prepared pavement sample on the central area of ​​the top of the test bench 1, then use the optical detector 10 to detect and record the initial pavement sample quality, then turn on the drive motor 46 to drive the reciprocating screw 3 to rotate, at this time the moving plate 31 will slide along the reciprocating screw 3, when the rolling roller 43 moves to the top of the pavement sample, the electric push rod 41 extends downward, so that the rolling roller 43 fits the surface of the pavement sample, and at the same time opens the solenoid valve in the water pipe 52, at this time the water flow inside the water tank 51 will enter the water pipe 52 along the water pipe 52, and then sprayed downward from the water spray box 53 to the surface of the pavement sample, then under the rotation of the reciprocating screw 3, the rolling roller 43 will continuously move along the surface of the pavement sample after the water flow is sprayed The roller 43 moves back and forth to exert pressure on the road surface sample, and under the action of friction, the rolling roller 43 rotates around the positioning shaft 44. At this time, through the repulsive effect of the first magnetic plate 452 and the second magnetic plate 441, when the two are in the repulsive area, the first magnetic plate 452 will push the vibration plate 451 to compress the side of the first spring 453, so as to compress and accumulate force on the first spring 453. When the first magnetic plate 452 and the first magnetic plate 452 are separated from the repulsive area, under the rebound action of the first spring 453, the vibration plate 451 will rebound quickly and hit the inner wall of the vibration groove 45, so as to generate vibration on the surface of the road surface sample. The above methods of water spraying, rolling and vibration simulate a more realistic road condition, thereby improving the accuracy of the test results.

[0048] While the reciprocating screw 3 is rotating, the third magnetic plate 63 and the piston plate 61 are repelled from each other. When the two are in the repelling area, the piston plate 61 will move toward the side of the second spring 62 to compress the gas inside the cavity of the piston box 6, and open the one-way valve in the first air pipe 64, so that the compressed gas is filled into the water storage tank 51 along the first air pipe 64, thereby increasing the internal air pressure of the water storage tank 51, thereby pushing the water flow to spray downward from the water spray box 53 more quickly, and then generating a greater downward impact on the surface of the road surface sample; and when the third magnetic plate 63 and the piston plate 61 are in the repelling area, the piston plate 61 will move toward the side of the second spring 62 to compress the gas inside the cavity of the piston box 6, and open the one-way valve in the first air pipe 64, so that the compressed gas is filled into the water storage tank 51 along the first air pipe 64, thereby increasing the internal air pressure of the water storage tank 51, thereby pushing the water flow to spray downward from the water spray box 53 more quickly, and then generating a greater downward impact on the surface of the road surface sample. When the piston plate 61 leaves the repulsive area, under the rebound action of the second spring 62, the piston plate 61 will return to its original position and slide, thereby generating suction in the cavity of the piston box 6 and opening the one-way valve in the second air pipe 72, so that the negative pressure suction is transmitted along the second air pipe 72 and the T-shaped stage 71 to the negative pressure groove 7, thereby generating suction at the bottom of the pavement sample. Combined with the above-mentioned enhanced water flow impact effect, the water flow can accelerate the penetration of the pavement sample, thereby shortening the time required for the water flow to penetrate the pavement sample, shortening the time required for the impermeability test, and improving the test efficiency. In addition, when the first magnetic plate 452 and the second magnetic plate 441 repel each other, the vibration plate 451 will also compress the gas in the vibration groove 45 and open the one-way valve in the third air pipe 92, so that the compressed gas enters the top of the inner cavity of the water tank 51 along the vibration groove 45, the sealing ring 9, the air guide ring 91 and the third air pipe 92, thereby further increasing the internal air pressure of the water tank 51 and further accelerating the ejection speed of the water flow. When the first magnetic plate 452 and the second magnetic plate 441 are separated from the repulsive area, the vibration plate 451 will return to its original position and slide in the vibration groove 45, thereby also generating a negative pressure suction effect in the vibration groove 45 and opening the one-way valve in the fourth air pipe 93, so that the negative pressure suction is transmitted to the negative pressure groove 7, further accelerating the speed of water flow penetrating the pavement sample, thereby further improving the detection efficiency.

[0049] After the simulation test is completed, the electromagnetic valves in the horizontal groove 82 and the vertical groove 83 are controlled to open, so that the water in the drainage groove 8 and the liquid collecting groove 21 are discharged respectively, and finally the anti-seepage performance of the pavement sample is calculated according to the original water volume in the water storage tank 51; in addition, the quality of the pavement sample is detected again by the optical detector 10, and compared with the initial detection result, so as to obtain the damage condition of the pavement sample when encountering water penetration, that is, the water damage performance of the pavement.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pavement water damage and anti-seepage performance simulation test device, comprising a test bench (1), characterized in that: The top of the test bench (1) is fixedly connected to a mounting frame (2), the top of the test bench (1) is provided with a liquid collecting tank (21), and further comprises: A reciprocating screw rod (3), wherein the reciprocating screw rod (3) is rotatably connected between the inner walls on both sides of the mounting frame (2). A movable plate (31) is threadedly sleeved on the reciprocating screw rod (3), the top of the movable plate (31) is slidably fitted with the bottom of the mounting frame (2), and a rolling portion for simulating pressure on the road surface is provided at the bottom of the movable plate (31); A spray assembly, the spray assembly being arranged on a mounting frame (2), and the spray assembly being used to perform a water flow scouring simulation test on a road surface; The rolling part comprises a positioning plate (4), the positioning plate (4) being fixed to the bottom of the movable plate (31), both sides of the bottom of the positioning plate (4) being fixedly connected to electric push rods (41), the bottoms of the telescopic ends of the two groups of electric push rods (41) being fixedly connected to bending plates (42), the inner walls of the bending plates (42) being rotatably connected to rolling rollers (43), the side walls of the mounting frame (2) being fixedly connected to a driving motor (46), the output shaft of the driving motor (46) being fixedly connected to the end of the reciprocating screw rod (3); The rolling roller (43) is provided with a hollow groove (431), and a positioning shaft (44) is rotatably connected to the middle of the inner cavity of the hollow groove (431). Both ends of the positioning shaft (44) penetrate the rolling roller (43) and are fixedly connected to the side walls of the positioning plate (4). Vibration grooves (45) are provided on both sides of the hollow groove (431), and a vibration plate (451) is slidably connected in the vibration groove (45). A first magnetic plate (452) is fixedly connected to one side of the vibration plate (451) close to the hollow groove (431), and a first spring (453) is fixedly connected between the other side of the vibration plate (451) and the inner wall of the vibration groove (45). Second magnetic plates (441) are fixedly connected to both sides of the outer wall of the positioning shaft (44), and the second magnetic plate (441) and the first magnetic plate (452) are magnetically repelled from each other. The spray assembly comprises a water collecting pipe (5), the water collecting pipe (5) being fixed between the inner walls on both sides of the bending plate (42), the top of the mounting frame (2) being fixedly connected to a water storage tank (51), the bottom of the water storage tank (51) being fixedly connected to water guide pipes (52) on both sides, the other end of the water guide pipe (52) being connected to the inner cavity of the water collecting pipe (5), the two sides of the water collecting pipe (5) being fixedly connected to water spray boxes (53), the two groups of the water spray boxes (53) being symmetrically arranged along the center of the rolling roller (43), the bottom of the water spray boxes (53) being evenly spaced with water spray holes (531), and a switching portion for adjusting the direction of water flow being arranged between the two groups of the water spray boxes (53); A piston box (6) is fixedly connected to the side wall of the mounting frame (2); a piston plate (61) is slidably connected to the lower part of the inner cavity of the piston box (6); a second spring (62) is fixedly connected between the bottom of the piston plate (61) and the bottom of the inner cavity of the piston box (6); an end of the reciprocating screw rod (3) extends through the piston box (6); a third magnetic plate (63) is fixedly connected to the reciprocating screw rod (3) in the piston box (6); and the third magnetic plate (63) and the piston plate (61) are magnetically repelled from each other; a first air pipe (64) is fixedly connected to the lower part of the side wall of the piston box (6); the other end of the first air pipe (64) is connected to the top of the inner cavity of the water storage tank (51); and a one-way valve is arranged in the first air pipe (64); A negative pressure groove (7) is provided at the bottom of the test bench (1); a plurality of filter holes are provided at the center of the top of the test bench (1); the filter holes are communicated with the inner cavity of the negative pressure groove (7); a T-shaped platform (71) is fixedly connected to the bottom of the inner cavity of the negative pressure groove (7); a connecting rod of the T-shaped platform (71) is hollow, and the hollow top of the connecting rod of the T-shaped platform (71) is communicated with the inner cavity of the negative pressure groove (7); a second air pipe (72) is fixedly connected to the bottom of the piston box (6); the other end of the second air pipe (72) is communicated with the hollow bottom end of the connecting rod of the T-shaped platform (71), and a one-way valve is provided in the second air pipe (72).

2. A pavement water damage and anti-seepage performance simulation test device according to claim 1, characterized in that: The switching part comprises two groups of switching boxes (54), the two groups of switching boxes (54) are respectively fixed on the water spray boxes (53) on both sides, and the connected switching boxes (54) are communicated with the inner cavity of the water spray boxes (53), and switching plates (55) are slidably fitted in the two groups of switching boxes (54), and the switching plates (55) located in the switching boxes (54) on both sides are provided with conducting grooves (551).

3. A pavement water damage and anti-seepage performance simulation test device according to claim 1, characterized in that: The test bench (1) is provided with a drainage groove (8), the bottom of the side wall of the drainage groove (8) is fixed and connected to a drainage pipe (81), the bottom of the side wall of the negative pressure groove (7) is connected to the inner cavity of the drainage groove (8) via a horizontal groove (82), the bottom of the liquid collecting groove (21) is connected to the inner cavity of the drainage groove (8) via a vertical groove (83), and electromagnetic valves are provided in both the horizontal groove (82) and the vertical groove (83).

4. A pavement water damage and anti-seepage performance simulation test device according to claim 1, characterized in that: A sealing ring (9) is fixedly connected to both sides of the rolling roller (43), an air guide ring (91) is slidably connected inside the sealing ring (9), the air guide ring (91) is fixedly connected to the inner wall of the bending plate (42), the vibration groove (45) is connected to the inner cavity of the sealing ring (9), the sealing ring (9) is connected to the inner cavity of the air guide ring (91), a third air pipe (92) is fixedly connected between the side wall of the bending plate (42) and the top of the water storage tank (51), the two ends of the third air pipe (92) are respectively connected to the inner cavity of the air guide ring (91) and the top of the water storage tank (51), a fourth air pipe (93) is fixedly connected to the outer wall of the third air pipe (92), the other end of the fourth air pipe (93) is connected to the hollow inner cavity of the connecting rod of the T-shaped platform (71), and a one-way valve is provided on the side of the third air pipe (92) close to the water storage tank (51) and in the fourth air pipe (93).

5. A pavement water damage and anti-seepage performance simulation test device according to claim 1, characterized in that: An optical detector (10) is fixedly connected to the inner wall of the mounting frame (2), and a detection end of the optical detector (10) faces the center of the test bench (1).

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