Method for curing concrete of ballastless track

Abstract

The application provides a maintenance method for ballastless track concrete, and relates to the technical field of railway engineering, which comprises the following steps: injecting maintenance liquid into a diversion box during an initial maintenance period; when the liquid level of the maintenance liquid in the diversion box reaches the water inlet of a spraying flow path, the maintenance liquid overflows from the water inlet of the spraying flow path and flows into a spraying assembly through the spraying flow path; the spraying assembly sprays the corresponding moisture site; the injection of the maintenance liquid into the diversion box is stopped when the injection amount reaches a preset injection amount; after entering a maintenance period, the surface humidity collected by a surface humidity sensor in real time is compared with a preset humidity of the concrete to be maintained; when the surface humidity is lower than the preset humidity, the water supplementing flow of the spraying flow path is adjusted by a water supplementing amount adjusting assembly; and the water supplementing flow is adjusted to zero when the surface humidity reaches the preset humidity. The application guarantees the maintenance quality of the ballastless track concrete while reducing the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of railway engineering technology, and more specifically, to a method for curing concrete for ballastless tracks. Background Technology

[0002] After the ballastless track is poured, the track bed concrete needs to be sprayed with water and covered for curing. The existing curing method is as follows: after the formwork is removed, the concrete is continuously sprayed with water for moist curing; 2-3 hours after the second finishing, the geotextile is first covered and compacted tightly, and water is sprayed on the geotextile to make it thoroughly wet. Then, a thick plastic film is covered on the geotextile to prevent moisture evaporation; after 14 days of film covering curing, the film is removed to complete the curing. No water is added during the covering process. However, during the curing period of concrete, because the surface of the concrete is covered with a plastic film, the plastic film needs to be removed before the curing water is sprayed onto the geotextile. Moreover, the low humidity of the concrete usually occurs in localized areas on the concrete surface. Removing the entire plastic film for watering would expose the entire concrete to the outside, accelerating the loss of moisture from other parts of the concrete. This would cause the humidity of other parts to drop rapidly, turning the watering operation from localized to comprehensive, thus increasing the curing cost. Furthermore, the humidity of the areas that originally needed watering would drop again, which could easily lead to cracking in those areas and affect the later quality of the concrete. Summary of the Invention

[0003] The purpose of this invention is to provide a method for curing ballastless track concrete to improve the aforementioned problems. To achieve this purpose, the technical solution adopted by this invention is as follows:

[0004] This application provides a method for curing concrete for ballastless track, including the following steps:

[0005] Geotextile is covered on the surface of the concrete to be cured. A spray assembly is set above each moisture retention point on the concrete to be cured. A diversion box is set above each spray assembly. The upper side of the diversion box is connected to the spray assembly through a spray flow path, and the lower side of the diversion box is connected to the spray assembly through a water replenishment flow path. A water replenishment volume adjustment component is set on the water replenishment flow path.

[0006] The control lifting device drives the cover to descend. After the cover descends, it covers the concrete to be cured, the spraying assembly, and the surface humidity sensor inside the cover. The surface humidity sensor monitors the surface humidity of the concrete to be cured in real time.

[0007] During the initial curing period, curing solution is injected into the distribution box. When the curing solution level in the distribution box reaches the inlet of the spray flow path, the curing solution overflows from the inlet of the spray flow path and flows into the spray assembly. The spray assembly sprays the corresponding moisturizing points. When the curing solution injected into the distribution box reaches the preset injection volume, the injection stops.

[0008] After entering the curing cycle, the surface humidity collected in real time by the surface humidity sensor is compared with the preset humidity of the concrete to be cured. When the surface humidity is lower than the preset humidity, the water replenishment flow rate of the spray flow path is adjusted by the water replenishment adjustment component. After the surface humidity reaches the preset humidity, the water replenishment flow rate is adjusted to zero.

[0009] After curing is completed, the lifting device is used to open the cover and remove the cured concrete.

[0010] The beneficial effects of this invention are as follows:

[0011] This invention provides a method for curing ballastless track concrete, which enables quantitative spraying of the entire spray area during the initial curing cycle of the concrete to be cured, and water replenishment spraying during the curing cycle by adjusting the amount and location of water replenishment according to the real-time humidity of the concrete to be cured. This reduces the curing cost while ensuring the quality of ballastless track concrete curing.

[0012] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the external structure of the ballastless track concrete curing system in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the maintenance shed in an embodiment of the present invention;

[0016] Figure 3 This is a cross-sectional structural schematic diagram of the ballastless track concrete curing system in an embodiment of the present invention;

[0017] Figure 4 This is a cross-sectional view of the maintenance unit in an embodiment of the present invention;

[0018] Figure 5 for Figure 4 A magnified schematic diagram of the partial structure at point A in the middle;

[0019] Figure 6 for Figure 4 A magnified schematic diagram of the local structure at point B;

[0020] Figure 7 This is a cross-sectional view of the flow divider box in an embodiment of the present invention;

[0021] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point C in the middle;

[0022] Figure 9 This is a schematic diagram of the mounting structure of the connecting plate in an embodiment of the present invention;

[0023] Figure 10 This is a schematic diagram of the water replenishment flow path in an embodiment of the present invention;

[0024] Figure 11 for Figure 10 A magnified schematic diagram of the local structure at point D;

[0025] Figure 12 This is a side view of the water replenishment flow path in an embodiment of the present invention;

[0026] Figure 13 for Figure 12 A magnified schematic diagram of the structure at point E in the middle.

[0027] Figure 14 This is a flowchart of the ballastless track concrete curing method in an embodiment of the present invention.

[0028] Markings in the diagram: 1. Curing shed; 11. Base plate; 12. Mounting frame; 13. Shed body; 14. Concrete to be cured; 15. Geotextile; 16. Surface humidity sensor; 17. Ambient humidity sensor; 2. Cover; 21. Electric telescopic rod; 22. Connecting frame; 23. Plastic film; 3. Water supply mechanism; 31. Water storage tank; 32. Fixing frame; 33. Water inlet pipe; 34. Telescopic pipe; 35. Water pump; 36. Pumping pipe; 37. Outlet pipe; 38. Diverter box; 4. Water supply path; 41. Horizontal pipe; 42. Third piston; 43. Retaining ring; 44. Second spring; 45. Connecting pipe; 46. Water supply pipe; 47. Water supply container; 48. 49. First spring; 410. Hydraulic cylinder; 411. First piston; 412. Solenoid valve; 413. Bend; 414. Water injection hose; 5. Spray assembly; 51. Water injection pipe; 52. Rotating shaft; 53. Impeller; 54. Fourth piston; 55. Movable groove; 56. Moving rod; 57. Mounting plate; 58. Third spring; 59. Fixed cavity; 510. Inclined block; 511. Limiting rod; 512. Slider; 513. Fourth spring; 514. Moving block; 515. Pressing block; 516. Round block; 517. Beating rod; 518. Water inlet pipe; 519. Clamping plate; 520. Spray box; 521. Nozzle; 522. Connecting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figure 14 As shown, the present invention provides a method for curing ballastless track concrete, comprising the following steps:

[0032] S100: Cover the surface of the concrete 14 to be cured with geotextile 15, and set a spray assembly 5 above each moisture retention point on the concrete 14 to be cured. Set a diversion box 38 above each spray assembly 5. Connect the upper side of the diversion box 38 to the spray assembly 5 through the spray flow path, and connect the lower side of the diversion box 38 to the spray assembly 5 through the water replenishment flow path 4. Set a water replenishment volume adjustment component on the water replenishment flow path 4.

[0033] The adjustment of the water supply flow rate of the spray path via the water supply adjustment component includes:

[0034] The hydraulic cylinder, the first piston, the second piston 48, and the first spring are arranged in the water replenishment container 47 from bottom to top;

[0035] One end of the water supply pipe 46 is extended into the water supply container 47 and communicates with the space between the first piston and the second piston 48, and the other end of the water supply pipe 46 is connected to the horizontal pipe 41.

[0036] The third piston 42 is placed at the connection between the water supply pipe 46 and the horizontal pipe 41. One end of the horizontal pipe 41 is connected to the lower side of the diversion box 38. The second spring 44 is placed inside the horizontal pipe 41 and between the third piston 42 and the other end of the horizontal pipe 41.

[0037] One end of the connecting pipe 45 is connected to the water supply pipe 46, and the other end of the connecting pipe 45 is connected to the space between the third piston 42 and the other end of the horizontal pipe 41.

[0038] The retaining ring 43 is disposed inside the horizontal tube 41 and between the connecting point of the connecting tube 45 and the horizontal tube 41 and the third piston 42.

[0039] One end of the water injection hose 414 is extended into the cover 2 and connected to the spray assembly 5. The other end of the water injection hose 414 is connected to the space between the first piston and the second piston 48. The solenoid valve is located at the other end of the water injection hose 414.

[0040] Adjusting the water supply flow rate of the spray path via the water supply adjustment component further includes:

[0041] The hydraulic cylinder is activated, which drives the first piston to descend and adjust to the required water replenishment height. A negative pressure is formed inside the water replenishment pipe 46 and the connecting pipe 45, and the maintenance fluid inside the horizontal pipe 41 and the diversion box 38 is drawn in and sucked into the water replenishment container 47 through the water replenishment pipe 46.

[0042] When the water replenishment container 47 is filled with the required amount of maintenance fluid, the hydraulic cylinder rises and moves, driving the first piston to push the maintenance fluid inside the water replenishment container 47 upward and reset, driving the second piston 48 to rise and compress the first spring.

[0043] After the first piston is reset, the solenoid valve is opened, and the second piston 48 is pushed down and reset under the elastic force of the first spring. The second piston 48 is lowered and pressure is applied to the curing fluid between the second piston 48 and the first piston, so that the curing fluid is sprayed into the interior of the spray assembly 5 through the water injection hose 414. The spray assembly 5 sprays water to replenish the moisturizing points on the geotextile 15.

[0044] S200: Control the lifting device to drive the cover 2 to descend. After the cover 2 descends, it covers the concrete to be cured 14, the spraying assembly 5 and the surface humidity sensor 16 inside the cover 2. The surface humidity of the concrete to be cured 14 is monitored in real time by the surface humidity sensor 16.

[0045] The surface humidity of the concrete 14 to be cured is monitored in real time by a surface humidity sensor 16, including:

[0046] The upper surface of the concrete 14 to be cured is divided into a central region and an edge region;

[0047] Obtain the area of ​​the central region;

[0048] The moisturizing sites are evenly distributed in the central region according to the area of ​​the region, and the adjacent moisturizing sites in the central region are spaced apart by a first distance.

[0049] The moisturizing sites are arranged at second intervals in the edge region;

[0050] The first distance is set to be greater than the second distance;

[0051] A corresponding surface humidity sensor 16 is installed at each moisture retention point of the concrete 14 to be cured, and the surface humidity of the corresponding moisture retention point is detected by the surface humidity sensor 16.

[0052] The reason for arranging the moisture-retaining sites in this way is that the edges of the concrete 14 to be cured are more prone to cracking, so the surface humidity sensors 16 need to be arranged more densely.

[0053] S300: During the initial curing period, curing liquid is injected into the distribution box 38. When the level of curing liquid in the distribution box 38 reaches the inlet of the spray flow path, the curing liquid overflows from the inlet of the spray flow path and flows into the spray assembly 5 through the spray flow path. The spray assembly 5 sprays the corresponding moisturizing points. When the curing liquid injected into the distribution box 38 reaches the preset injection volume, the injection stops.

[0054] The process of injecting a maintenance solution into the distribution box 38 includes:

[0055] Several water pumps 35 are connected to the water storage tank 31;

[0056] A water outlet pipe 37 is connected to the outlet of each water pump 35, and the water outlet pipe 37 connects the interior of the water storage tank 31 to the top of the corresponding diversion box 38.

[0057] Turn on the water pump 35 to distribute the maintenance solution into the interior of each of the distribution boxes 38 through the outlet pipe 37.

[0058] S400: After entering the curing cycle, the surface humidity collected in real time by the surface humidity sensor 16 is compared with the preset humidity of the concrete 14 to be cured. When the surface humidity is lower than the preset humidity, the water replenishment flow rate of the spray flow path is adjusted by the water replenishment adjustment component. After the surface humidity reaches the preset humidity, the water replenishment flow rate is adjusted to zero.

[0059] Among them, the surface humidity collected in real time by the surface humidity sensor 16 and the preset humidity of the concrete to be cured 14 are compared, including:

[0060] The ambient humidity around the concrete 14 to be cured is obtained in real time by the ambient humidity sensor 17.

[0061] The ambient wind speed around the concrete 14 to be cured is obtained using a wind speed sensor;

[0062] The ambient temperature is obtained from the first temperature sensor, and the temperature of the concrete to be cured is obtained from the second temperature sensor.

[0063] The preset humidity is calculated based on the ambient wind speed, target evaporation rate, ambient temperature, and temperature of the concrete to be cured, using the concrete surface evaporation rate formula. The target evaporation rate during the concrete curing period is zero.

[0064] Compare the surface humidity with the preset humidity.

[0065] The formula for the evaporation rate of concrete surface is simplified to:

[0066] E = (T c +18)×(V 0. 5 +4)×(TR)×10 6

[0067] Where E is the evaporation rate, T is the ambient temperature, V is the ambient wind speed, R is the preset humidity, and T c The temperature of the concrete to be cured.

[0068] The goal is to make the evaporation rate E close to zero, so the preset humidity can be determined by working backward from the above calculation formula.

[0069] S500: After curing is completed, control the lifting device to drive the cover 2 to open and remove the cured concrete.

[0070] The maintenance method also includes:

[0071] A stress sensor is pre-embedded at the location where the concrete to be cured 14 is placed;

[0072] The stress value of the concrete 14 to be cured is detected by a stress sensor;

[0073] Compare the stress values ​​with the warning range;

[0074] When the stress value is outside the warning range, adjust the water supply flow rate and ambient temperature so that the stress value reaches the warning range.

[0075] The stress value is compared with the warning range, including:

[0076] The cracking risk coefficient of the concrete 14 to be cured is calculated by dividing the stress value by the standard value of the tensile strength of the concrete 14 to be cured.

[0077] When the cracking risk coefficient is less than 0.7, it indicates that the maintenance parameters are set reasonably;

[0078] If the risk coefficient is greater than 0.7, it indicates that the parameter settings are unreasonable and the water supply flow rate and ambient temperature need to be readjusted until the cracking risk coefficient drops below 0.7.

[0079] The curing method includes, when pouring the concrete to be cured:

[0080] The second temperature sensor is pre-embedded in the middle and upper part of the concrete to be cured;

[0081] The stress sensors are pre-embedded in the middle, upper part and four corners of the concrete to be cured;

[0082] The surface humidity sensor is attached tightly to the surface of the concrete to be cured.

[0083] The maintenance method also includes:

[0084] Obtain the dimensional parameters of the concrete to be cured (e.g., the length, width, and thickness of a double-block ballastless track or a long-sleeper embedded ballastless track), and calculate the theoretical temperature rise and fall range of the concrete to be cured based on the dimensional parameters.

[0085] The temperature of the concrete to be cured, monitored by the second temperature sensor, is acquired in real time, and the actual temperature rise and fall of the concrete to be cured are calculated.

[0086] Compare the actual temperature rise and fall of the concrete to be cured with the theoretical temperature rise and fall.

[0087] The environment is heated or cooled by a temperature control device, so that the actual heating or cooling range is within the theoretical curve of the theoretical heating or cooling range.

[0088] Temperature sensors are pre-embedded in the middle and upper parts of the track bed. Within each construction section, sensors are selected at the center of the track bed slab for pre-embedding to monitor internal temperature changes in the track bed concrete. Simultaneously, ambient temperature monitoring points are also installed. Stress sensors are pre-embedded in the middle, upper parts of the track bed, and at the four corners of the sleepers; they can be pre-embedded in the same location as the temperature sensors. Humidity monitoring sensors are attached directly to the surface of the track bed concrete.

[0089] The curing method also includes finishing the concrete 14 to be cured after the initial curing period, including:

[0090] The lifting device is controlled to drive the cover 2 to rise until the concrete 14 to be cured, covered with geotextile 15, appears.

[0091] Remove the geotextile 15 and perform a finishing operation. After the second finishing, cover the geotextile 15 again and compact it.

[0092] The control lifting device drives the cover 2 to descend until the cover 2 covers the concrete 14 to be cured, which is covered with geotextile 15.

[0093] The maintenance method also includes:

[0094] After entering the maintenance cycle, the cover 2 is periodically shaken by a vibration device;

[0095] Collect the water droplets shaken off the cover 2 into the diversion box 38; and / or

[0096] The water droplets shaken off the cover 2 are directly shaken onto the geotextile 15.

[0097] The present invention also provides a ballastless track concrete curing system, comprising:

[0098] A concrete placement area is provided for placing the concrete 14 to be cured.

[0099] A covering assembly, the covering assembly including a lifting device and a cover 2, the lifting device being connected to the cover 2, the lifting device being used to drive the cover 2 to perform lifting and lowering movements;

[0100] The curing unit includes several water replenishment mechanisms 3. Each water replenishment mechanism 3 includes a spray assembly 5, a surface humidity sensor 16, a distribution box 38, a spray flow path, and a water replenishment flow path 4. The spray assembly 5 is located inside the cover 2 and above the concrete placement position. The distribution box 38 is located above the spray assembly 5. The inlet of the spray flow path is connected to the upper interior of the distribution box 38, and the outlet of the spray flow path is connected to the spray assembly 5. The water replenishment flow path 4 includes a pipe and a water replenishment volume adjustment component installed on the pipe. The inlet of the pipe is connected to the lower interior of the distribution box 38, and the outlet of the pipe is connected to the spray assembly 5. The surface humidity sensor 16 is installed at the concrete placement position and is used to monitor the surface humidity of the concrete 14 to be cured. The cover 2 is used to cover the surface humidity sensor 16 and the concrete 14 to be cured.

[0101] The control unit is connected to the lifting device, each of the surface humidity sensors 16, and the water replenishment adjustment component.

[0102] The water replenishment path 4 is located outside the cover 2. The pipeline includes a horizontal pipe 41 and a water injection hose 414. The water replenishment volume adjustment assembly includes a water replenishment container 47, a hydraulic cylinder 410, a first piston 411, a second piston 48, a third piston 42, a first spring 49, a second spring 44, a retaining ring 43, a water replenishment pipe 46, a connecting pipe 45, and a solenoid valve 412. The hydraulic cylinder 410, the first piston 411, the second piston 48, and the first spring 49 are arranged sequentially from bottom to top in the water replenishment container 47. One end of the water replenishment pipe 46 extends into the water replenishment container 47 and communicates with the space between the first piston 411 and the second piston 48. The other end of the water replenishment pipe 46 is connected to the horizontal pipe 41. The third piston 42 is located at the connection between the water replenishment pipe 46 and the horizontal pipe 41. One end of the horizontal pipe 41 is connected to the diversion box 3. The interior of the 8 is connected below. The second spring 44 is located inside the horizontal tube 41 and is disposed between the third piston 42 and the other end of the horizontal tube 41. One end of the connecting tube 45 is connected to the water supply tube 46, and the other end of the connecting tube 45 is connected to the space between the third piston 42 and the other end of the horizontal tube 41. The retaining ring 43 is disposed inside the horizontal tube 41 and is located between the connection point of the connecting tube 45 and the horizontal tube 41 and the third piston 42. One end of the water injection hose 414 extends into the cover 2 and is connected to the spray assembly 5. The other end of the water injection hose 414 is connected to the space between the first piston 411 and the second piston 48. The solenoid valve 412 is disposed at the other end of the water injection hose 414. The solenoid valve 412 and the hydraulic cylinder 410 are connected to the control unit.

[0103] The diversion box 38 is located outside the cover 2 and above the spray assembly 5, and the spray flow path is a vertically arranged telescopic pipe 34.

[0104] Several of the diversion boxes 38 are connected to the same water storage tank 31, which is located above the diversion boxes 38. The diversion boxes 38 and the water storage tank 31 are connected by a water pump 35.

[0105] Several of the water replenishment mechanisms 3 are arranged at intervals on both sides of the concrete placement position, and the water storage tank 31 is located in the middle of the two rows of diversion boxes 38.

[0106] The ballastless track concrete curing system also includes a curing shed 1. The concrete placement position, covering components and curing units are all set inside the curing shed 1. The water storage tank 31 is fixed to the top inside the curing shed 1. An environmental humidity sensor 17 is installed inside the curing shed 1.

[0107] The bottom of the maintenance shed 1 is provided with a base plate 11, the water replenishment container 47 is fixed on the base plate 11, and the concrete placement position is set on the base plate 11.

[0108] The spray assembly 5 includes a water injection pipe 51, a fourth piston 54, a clamping plate 519, a spray box 520, and a plurality of nozzles 521. The water injection pipe 51 is disposed above the spray box 520. The plurality of nozzles 521 are arranged at the bottom of the spray box 520 and communicate with the interior of the spray box 520. One end of the water injection pipe 51 is connected to one end of the water injection hose 414. The fourth piston 54 is disposed inside the water injection pipe 51. The water injection pipe 51 communicates with the spray box 520. One end of the clamping plate 519 is horizontally clamped at the interface between the water injection pipe 51 and the spray box 520 and isolates the interface. The other end of the clamping plate 519 is linked to the fourth piston 54.

[0109] The cover 2 includes a connecting frame 22 and a plastic film 23. The plastic film 23 is fixed on the connecting frame 22. The spray assembly 5 also includes a moving rod 56, a rotating shaft 52, an impeller 53, a fixed shaft, a fixed cavity 59, an inclined block 510, a slider 512, a moving block 514, a pressing block 515, a third spring 58, a fourth spring 513, a limiting rod 511, a round block 516, and a tapping rod 517. The other end of the water injection pipe 51 is sequentially connected to a horizontally arranged fixed shaft and a fixed cavity 59. The fixed shaft is connected to two fixed cavities 59, one above the other. The fixed shaft has two movable slots 55, one above the other. Each groove 55 is equipped with a third spring 58 and a mounting plate 57. One end of the two vertically arranged moving rods 56 is fixedly connected to the fourth piston 54. The other ends of the two moving rods 56 pass through the mounting plate 57 and the third spring 58 in sequence and extend to one side of the corresponding fixed cavity 59. The mounting plate 57 is fixedly connected to the moving rod 56. The third spring 58 is sleeved on the moving rod 56. The mounting plate 57 corresponding to the lower moving rod 56 is linkedly connected to the other end of the clamping plate 519. The other end of the moving rod 56 is connected to the inclined block 510 disposed in the fixed cavity 59. The limiting rods 511 are vertically arranged on both sides of the fixed cavity 59. From top to bottom, the limiting rods 511 are fitted with the fourth spring 513 and the slider 512. One end of the fourth spring 513 is connected to the slider 512, and the other end of the fourth spring 513 is connected to the top of the fixed cavity 59. A moving block 514 is connected between the sliders 512 on the two limiting rods 511. The inclined surface of one end of the moving block 514 abuts against the inclined surface of the inclined block 510. The other end of the moving block 514 is connected to one end of the vertically arranged pressing block 515. The other end of the pressing block 515 extends to the fixed cavity 59. The fixed cavity 59 is located outside and abuts against the rotating shaft 52. One end of the rotating shaft 52 is located inside the water injection pipe 51. The impeller 53 is fixed to one end of the rotating shaft 52. The other end of the rotating shaft 52 passes sequentially between the piston, the two moving rods 56 in the fixed shaft, and the two fixed cavities 59. The rotating shaft 52 is connected to the inside of the fixed shaft by a bearing. At least one circular block 516 is sleeved on the other end of the rotating shaft 52. Several tapping rods 517 are evenly distributed around the outer circumference of the circular block 516. When the rotating shaft 52 rotates, each tapping rod 517 taps the plastic film 23 in sequence.

[0110] The concrete placement location is pre-embedded with stress sensors and temperature sensors, and the control unit is connected to the stress sensors and temperature sensors respectively.

[0111] like Figure 1As shown in the figure, this embodiment of a ballastless track concrete curing system includes a curing shed 1 set on the outermost side and a cover 2 set inside the curing shed 1.

[0112] like Figures 2-3 As shown, the curing shed 1 includes an internal mounting frame 12 and a shed body 13 fixed on the mounting frame 12. The cover 2 is positioned directly above the concrete 14 to be cured. The cover 2 includes a connecting frame 22 and a plastic film 23. The top end of the electric telescopic rod 21 is fixedly connected to the top of the curing shed 1, and the bottom end of the electric telescopic rod 21 is fixedly connected to the connecting frame 22. The curing shed 1 is set on a base plate 11, and a concrete placement position is set in the middle of the base plate 11. The shape of the concrete placement position is set according to the shape of the concrete 14 to be cured (i.e., ballastless track concrete). In this embodiment, the concrete placement position is rectangular. The concrete 14 to be cured is placed on the concrete placement position. An environmental humidity sensor 17 is set on the top of the curing shed 1. Geotextile 15 is covered on the ballastless track concrete. A storage container is fixed in the middle of the interior of the roof of the curing shed 1. The water tank 31, the curing unit includes several water replenishment mechanisms 3, each water replenishment mechanism 3 includes a spray assembly 5, a diversion box 38, a spray flow path and a water replenishment flow path 4. A row of diversion boxes 38 is provided on each of the lower two sides of the water tank 31, and a row of water replenishment flow paths 4 is provided on each of the two sides of the concrete placement position. A water inlet pipe 33 is vertically connected to the water tank 31 for connecting to an external water supply source. The two sides of the water tank 31 are respectively fixed to the roof of the curing shed 1 by fixing brackets 32.

[0113] like Figure 4 and Figure 10 As shown, the water replenishment path 4 is located outside the cover 2. The pipeline includes a horizontal pipe 41 and a water injection hose 414. The water replenishment adjustment assembly includes a water replenishment container 47, a hydraulic cylinder 410, a first piston 411, a second piston 48, a third piston 42, a first spring 49, a second spring 44, a retaining ring 43, a water replenishment pipe 46, a connecting pipe 45, and a solenoid valve 412. The hydraulic cylinder 410, the first piston 411, the second piston 48, and the first spring 49 are arranged sequentially from bottom to top in the water replenishment container 47. One end of the water replenishment pipe 46 extends into the water replenishment container 47 and communicates with the space between the first piston 411 and the second piston 48. Figure 5As shown, the other end of the water supply pipe 46 is connected to the horizontal pipe 41. The third piston 42 is disposed at the connection between the water supply pipe 46 and the horizontal pipe 41. One end of the horizontal pipe 41 is connected to the lower interior of the diversion box 38. The second spring 44 is located inside the horizontal pipe 41 and is disposed between the third piston 42 and the other end of the horizontal pipe 41. One end of the connecting pipe 45 is connected to the water supply pipe 46, and the other end of the connecting pipe 45 is connected to the third piston 42 and the other end of the horizontal pipe 41. The space between them is connected. The retaining ring 43 is disposed inside the horizontal pipe 41 and is located between the connection point of the connecting pipe 45 and the horizontal pipe 41 and the third piston 42. One end of the water injection hose 414 extends into the cover 2 and communicates with the spray assembly 5. The other end of the water injection hose 414 communicates with the space between the first piston 411 and the second piston 48. The solenoid valve 412 is disposed at the other end of the water injection hose 414. The solenoid valve 412 and the hydraulic cylinder 410 are connected to the control unit. A surface humidity sensor 16 is provided on each side of the concrete to be cured 14. The spray assembly 5 includes a water injection pipe 51, a fourth piston 54, a clamping plate 519, a spray box 520, and several nozzles 521. The water injection pipe 51 is located above the spray box 520. The several nozzles 521 are arranged at the bottom of the spray box 520 and communicate with the interior of the spray box 520. One end of the water injection pipe 51 is connected to one end of the water injection hose 414. The fourth piston 54 is located inside the water injection pipe 51. The water injection pipe 51 communicates with the spray box 520. One end of the clamping plate 519 is laterally clamped at the interface between the water injection pipe 51 and the spray box 520 and isolates the interface. The other end of the clamping plate 519 is linked to the fourth piston 54. The water injection hose 414 is a corrugated pipe. A connecting plate 522 located outside the plastic film 23 is fixedly sleeved on the outer surface of the water injection pipe 51. One side of the connecting plate 522 is connected to the connecting frame 22.

[0114] The control unit is connected to the lifting device, each of the surface humidity sensors 16, and the water replenishment adjustment component, respectively. A stress sensor and a temperature sensor are pre-embedded in the concrete placement area, and the control unit is connected to both the stress sensor and the temperature sensor.

[0115] The control unit activates hydraulic cylinder 410, which drives the first piston 411 to descend to the required water level. The descent of the first piston 411 creates a negative pressure inside the water supply pipe 46 and connecting pipe 45, drawing in the maintenance fluid from the horizontal pipe 41 and distribution box 38. This fluid is then drawn into the water supply container 47 through the water supply pipe 46. When the water supply container 47 contains the required amount of maintenance fluid, hydraulic cylinder 410 operates, causing the first piston 411 to push the maintenance fluid inside the water supply container 47 upwards and reset, pushing the second piston 48 upwards. The first spring 49... After being compressed, the first piston 411 is reset, and the solenoid valve 412 is opened. Under the restoring force of the first spring 49, the second piston 48 is pushed down and reset. The descent of the second piston 48 applies pressure to the curing fluid between the second piston 48 and the first piston 411, causing it to be sprayed into the interior of the spray assembly 5 through the bend pipe 413 and the water injection hose 414. The spray assembly 5 sprays water to the corresponding positions of the geotextile 15 and replenishes water to the low-humidity areas of the concrete 14 to be cured. This allows for targeted water replenishment at the required locations and enables quantitative water replenishment, improving the utilization rate of water resources.

[0116] By setting nozzle 521, the operation of water pump 35 allows the curing liquid inside water storage tank 31 to be drawn through water pipe 36 and sent into distribution box 38 through water outlet pipe 37, causing the liquid level inside distribution box 38 to rise. The liquid is then poured into spray box 520 through telescopic pipe 34 and finally sprayed onto geotextile 15 through nozzle 521, thus realizing the spray curing operation of concrete 14 to be cured.

[0117] By setting surface humidity sensors 16, the surface humidity of the concrete 14 to be cured is monitored by multiple surface humidity sensors 16. The control unit compares the data monitored by each surface humidity sensor 16 with the preset humidity and, with reference to the ambient humidity, determines that the humidity at one or more surface humidity sensors 16 on the surface of the concrete 14 to be cured is low, and determines the corresponding amount of water to be added. Then, the hydraulic cylinder 410 is controlled to add water.

[0118] By setting the third piston 42, the descent of the first piston 411 can create a negative pressure inside the water supply pipe 46 and the connecting pipe 45. At this time, the third piston 42 will move to the left under the negative pressure, causing the second spring 44 to be compressed and simultaneously abutted by the retaining ring 43. Due to the movement of the third piston 42, the obstruction at the port of the water supply pipe 46 can be released, thereby allowing the horizontal pipe 41 to connect with the water supply pipe 46.

[0119] The water supply regulating component described above can also be replaced by a valve. However, in terms of performance, the water supply regulating component described above is significantly superior to the traditional valve structure. The advantages of the water supply regulating component described above are as follows:

[0120] The above solution achieves multi-level control and redundancy design through the coordinated operation of a multi-stage hydraulic system and multiple pistons and springs. Even if one component fails, the others can continue to operate, ensuring system reliability. Valve opening adjustment relies on a single control mechanism; if the valve or sensor fails, the system may fail. The above solution utilizes a hydraulic system for precise negative pressure suction and control, achieving accurate water delivery and distribution. While real-time valve adjustment can control water volume to some extent, its accuracy and response speed may be inferior to a hydraulic system, especially in complex environments where accuracy can be affected. The above method employs multiple mechanical components and hydraulic principles, enabling it to adapt to more complex environmental conditions, such as humidity and pressure variations. The valves operate in complex environments... In some cases, more complex sensing and control systems may be required, and maintenance is more difficult. The above method has a high degree of automation, achieving fully automatic operation through the linkage of hydraulic cylinder 410 and sensors, reducing manual intervention and simplifying maintenance. Although valves can also achieve automatic control, their adjustment mechanisms are more complex, especially under frequently changing conditions, making maintenance and calibration more difficult. The above solution achieves precise water replenishment through multi-point humidity monitoring and negative pressure suction mechanisms, avoiding over- or under-watering and improving water resource utilization efficiency. Valve adjustment is limited by its adjustment accuracy and response speed, and there may be slight over- or under-watering, affecting water resource utilization efficiency. The above solution constructs a highly redundant and reliable system through the coordinated operation of hydraulic cylinder 410, multiple pistons, springs, and sensors. The failure of any component will not immediately lead to the failure of the entire system, because other components and mechanisms can compensate for the failure through backup operation or manual intervention. This design ensures the reliability and continuous operation of the system.

[0121] like Figure 6 and Figure 11As shown, the spray assembly 5 also includes a moving rod 56, a rotating shaft 52, an impeller 53, a fixed shaft, a fixed cavity 59, an inclined block 510, a slider 512, a moving block 514, a pressing block 515, a third spring 58, a fourth spring 513, a limiting rod 511, a round block 516, and a striking rod 517. The other end of the water injection pipe 51 is sequentially connected to a horizontally arranged fixed shaft and a fixed cavity 59. The fixed shaft is connected to two fixed cavities 59, and two movable grooves 55 are provided on the fixed shaft. Each component is equipped with a third spring 58 and a mounting plate 57. One end of the two vertically arranged moving rods 56 is fixedly connected to the fourth piston 54. The other ends of the two moving rods 56 pass through the mounting plate 57 and the third spring 58 in sequence and extend to one side of the corresponding fixed cavity 59. The mounting plate 57 is fixedly connected to the moving rod 56. The third spring 58 is sleeved on the moving rod 56. The mounting plate 57 corresponding to the lower moving rod 56 is linkedly connected to the other end of the clamping plate 519. Figures 12-13 As shown, the other end of the moving rod 56 is connected to the inclined block 510 disposed in the fixed cavity 59. Two limiting rods 511 are vertically disposed on both sides of the fixed cavity 59. The limiting rods 511 are sequentially fitted with the fourth spring 513 and the slider 512 from top to bottom. One end of the fourth spring 513 is connected to the slider 512, and the other end of the fourth spring 513 is connected to the top of the fixed cavity 59. A moving block 514 is connected between the sliders 512 on the two limiting rods 511. The inclined surface of one end of the moving block 514 abuts against the inclined surface of the inclined block 510, and the other end of the moving block 514 is connected to one end of the vertically disposed pressing block 515. The other end of the clamping block 515 extends to the outside of the fixed cavity 59 and abuts against the rotating shaft 52. One end of the rotating shaft 52 is located inside the water injection pipe 51. The impeller 53 is fixed to one end of the rotating shaft 52. The other end of the rotating shaft 52 passes sequentially between the piston, the two moving rods 56 in the fixed shaft, and the two fixed cavities 59. The rotating shaft 52 is connected to the inside of the fixed shaft through a bearing. At least one circular block 516 is sleeved on the other end of the rotating shaft 52. Several tapping rods 517 are evenly distributed around the outside of the circular block 516. When the rotating shaft 52 rotates, each tapping rod 517 taps the plastic film 23 in sequence.

[0122] By setting a third spring 58, when the mounting plate 57 moves to the right under the thrust of the water, the third spring 58 can be compressed. When the mounting plate 57 is not under the thrust of the water, the elasticity of the third spring 58 can push the mounting plate 57 to reset.

[0123] By setting the pivot 52, the movement of the moving rod 56 can push and squeeze the moving block 514, the slider 512 and the pressing block 515 along the outer surface of the limiting rod 511 to move outward, so that the fourth spring 513 is compressed, and at the same time the pressing block 515 releases its contact with the pivot 52, thereby releasing the fixation of the pivot 52.

[0124] By setting the clamping plate 519, when the maintenance fluid enters the interior of the water injection pipe 51 through the water injection hose 414, the maintenance fluid will fill the interior of the water injection pipe 51 through the impeller 53. Then the fourth piston 54 moves to the right, and drives the moving rod 56 and the mounting plate 57 to move to the right, and compresses the third spring 58. The mounting plate 57 drives the clamping plate 519 to move to the right and release the seal of the water inlet pipe 518.

[0125] Combination Figure 7-9 As shown, several distribution boxes 38 are connected to the same water storage tank 31, which is located above the distribution boxes 38. The distribution boxes 38 and the water storage tank 31 are connected by a water pump 35. A water pump 35 has a pump pipe 36 connected to one side, and the other end of the pump pipe 36 extends into the interior of the water storage tank 31. A water outlet pipe 37 is connected to the other side of the water pump 35, and the other end of the water outlet pipe 37 is connected to the distribution box 38. A telescopic pipe 34 is fixedly connected to the top of the other side of the distribution box 38. The other end of the telescopic pipe 34 extends into the interior of the cover 2 and connects to the spray box 520. Several nozzles 521 are arranged in an array at the bottom of the spray box 520.

[0126] Working principle and usage process of this invention:

[0127] Before pouring, temperature monitoring elements and stress monitoring elements are pre-embedded on the base plate 11, and surface humidity sensor 16 and ambient humidity sensor 17 are installed. After pouring and waiting for the initial setting of the concrete 14 to be cured, geotextile 15 is first covered. Then, the surface humidity sensor 16 is used to determine the surface humidity of the concrete, and the ambient humidity sensor 17 is used to determine the ambient humidity inside the curing shed 1. After the humidity value is transmitted back to the system, the system compares the difference between the ambient humidity and the surface humidity to carry out spray water replenishment and initial curing.

[0128] During the initial curing, the operation of the water pump 35 allows the curing liquid inside the water storage tank 31 to be drawn through the water pumping pipe 36 and sent into the distribution box 38 through the water outlet pipe 37, causing the liquid level inside the distribution box 38 to rise. When the liquid level inside the distribution box 38 exceeds the port of the telescopic pipe 34, the curing liquid will flow out through the telescopic pipe 34 and be poured into the spray box 520 through the telescopic pipe 34. Finally, it will be sprayed onto the geotextile 15 through the nozzle 521 to achieve spray curing of the ballastless track slab 14. During the finishing operation, the geotextile 15 is lifted and the finishing operation is carried out. After the second finishing, the geotextile 15 is covered again and compacted. The electric telescopic rod 21 is then activated. Due to the operation of the electric telescopic rod 21, the connecting frame 22 and the plastic film 23 can be lowered, and the plastic film 23 is covered on the outside of the geotextile 15 through the connecting frame 22.

[0129] The maintenance cycle is 14 days. Multiple surface humidity sensors 16 monitor the surface humidity of the ballastless track slab 14. The data monitored by each surface humidity sensor 16 is compared with a preset humidity level, and the ambient humidity is referenced. It is determined that the humidity at one or more surface humidity sensors 16 is low at that location on the surface of the ballastless track slab 14, and the corresponding water replenishment amount is determined. Then, the control unit activates the hydraulic cylinder 410, which drives the first piston 411 to descend to the required water level. Due to the descent of the first piston 411, the required water level is reached. This creates a negative pressure inside the water supply pipe 46 and the connecting pipe 45. At this time, the third piston 42 will move to the left under the negative pressure, compressing the second spring 44, which is simultaneously abutted by the retaining ring 43. Due to the movement of the third piston 42, the obstruction at the port of the water supply pipe 46 is released, allowing the horizontal pipe 41 to connect with the water supply pipe 46. The negative pressure in the water supply pipe 46 draws the maintenance fluid from the horizontal pipe 41 and the distribution box 38, causing it to be drawn into the water supply container 47 through the water supply pipe 46. As the liquid level inside the water supply container 47 rises, the... The negative pressure inside the water replenishment container 47 gradually decreases. When the water replenishment container 47 contains the required amount of maintenance fluid, the internal pressure will return to normal. Then, due to the restoring force of the second spring 44, the third piston 42 is pushed back to its original position and continues to block the port of the water replenishment pipe 46. Then, the hydraulic cylinder 410 operates again, causing the first piston 411 to push the maintenance fluid inside the water replenishment container 47 upward and reset. As the first piston 411 rises, it will push the second piston 48 upward, and the first piston 411 will move upward and reset. When spring 49 is compressed, after the first piston 411 is reset, the control end opens the solenoid valve 412. At this time, under the restoring force of the first spring 49, the second piston 48 is pushed down to reset. The second piston 48 is then pressed down to apply pressure to the curing fluid between the second piston 48 and the first piston 411, causing it to be sprayed into the interior of the water spraying mechanism 5 through the bend pipe 413 and the corrugated pipe 414. Finally, the water spraying mechanism 5 sprays water to the corresponding positions of the geotextile 15 and replenishes water to the low-humidity positions on the ballastless track slab 14.

[0130] In areas with lower humidity, water loss is greater, resulting in more water droplets adhering to the plastic film 23 at those locations. When the curing liquid enters the water injection pipe 51 through the corrugated pipe 414, it fills the water injection pipe 51 via the impeller 53, then pushes the piston 4 54 to the right, moving the moving rod 56 and mounting plate 57 to the right and compressing the third spring 58. The mounting plate 57 then moves the clamping plate 519 to the right, releasing the seal of the inlet pipe 518, allowing the curing liquid to flow into the spray box 520 and be sprayed out through the nozzle 521. This replenishes water to areas of insufficient liquid in the concrete. Simultaneously, due to the movement of the moving rod 56... The movement can be achieved by the inclined block 510 pushing and squeezing the moving block 514, slider 512, and clamping block 515 outward along the outer surface of the limiting rod 511, thus compressing the spring 513. Simultaneously, the clamping block 515 releases its contact with the rotating shaft 52, releasing the shaft's fixation. As the curing fluid flows inside the water injection pipe 51, it drives the impeller 53, rotating shaft 52, circular block 516, and striking rod 517 to rotate. The rotation of the striking rod 517 strikes the plastic film 23, causing it to shake and dislodging water droplets onto the geotextile 15, thus ensuring efficient water resource utilization. This structure realizes the function of the vibration device shaking cover 2 in the above-mentioned ballastless track concrete curing method of the present invention.

[0131] This invention enables the replenishment of curing moisture at any time. By real-time monitoring of the internal temperature of the concrete and comparing it with the theoretical temperature rise and fall range, the temperature is raised or lowered through a temperature adjustment device, so that the actual temperature rise and fall of the concrete is within the theoretical curve, avoiding large temperature differences. At the same time, in order to save costs, the temperature rise or fall will be controlled within a certain range of the ambient temperature.

[0132] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0133] 1. This invention, by setting up water injection pipes 51 and a plastic film 23, monitors the surface humidity of the ballastless track slab during the maintenance process using multiple surface humidity sensors 16. The data monitored by each surface humidity sensor 166 is compared with the preset humidity, and with reference to the ambient humidity, it is determined that the humidity at one or more surface humidity sensors 16 is low, and the corresponding water replenishment amount is determined. Since the spray assembly 5 is inside the plastic film 23, and due to the operation of the electric telescopic rod 21, the multiple water injection pipes 51 can be driven by the connecting plate 522 along with the plastic film 23. The corrugated pipe can retract simultaneously as the water injection pipe 51 descends, ensuring the connection between the spray assembly 5 and the water replenishment mechanism 3. Furthermore, the telescopic pipe 34 can extend as the water injection pipe 51 descends. This design ensures that the water injection pipe 51 remains inside the plastic film 23. During subsequent water replenishment operations, the plastic film 23 cannot be lifted for further water replenishment, thus preventing a significant loss of curing fluid from the surface of the ballastless track bed slab after the plastic film 23 is lifted. This prevents further decrease in humidity, avoids cracking of this portion of the ballastless track bed slab, and ensures the quality and strength of the ballastless track bed slab.

[0134] 2. This invention, by setting up a water supply pipe 46 and a water supply container 47, utilizes the movement of the hydraulic cylinder 410 to drive the first piston 411 downwards to the required water level. The descent of the first piston 411 creates a negative pressure inside the water supply pipe 46 and the connecting pipe 45. At this time, the third piston 42 moves to the left under this negative pressure, compressing the second spring 44, which is simultaneously abutted by the retaining ring 43. The movement of the third piston 42 releases the obstruction at the port of the water supply pipe 46, allowing the horizontal pipe 41 to connect with the water supply pipe 46. The negative pressure in the water supply pipe 46 draws the curing fluid from the horizontal pipe 41 and the distribution box 38, drawing it into the water supply container 47. As the water level inside the water supply container 47 rises, the negative pressure inside gradually decreases. When the water supply container 47 contains the required amount of curing fluid, the internal pressure returns to normal. Then, due to the elasticity of the second spring 44, the pressure returns to normal. The reaction causes the third piston 42 to reset and continue blocking the water supply pipe 46. Then, the hydraulic cylinder 410 operates again, causing the first piston 411 to push the curing fluid inside the water supply container 47 upward and reset. As the first piston 411 rises, it pushes the second piston 48 upward and compresses the first spring 49. After the first piston 411 resets, the control end opens the solenoid valve 412. At this time, under the restoring force of the first spring 49, the second piston 48 is pushed down and reset. The descent of the second piston 48 applies pressure to the curing fluid between the second piston 48 and the first piston 411, causing it to be sprayed into the interior of the spray assembly 5 through the bend pipe 413 and the water injection hose 414. Finally, the spray assembly 5 sprays water onto the corresponding positions of the geotextile 15 and replenishes water to the low-humidity areas on the ballastless track bed. This allows for targeted water replenishment and quantitative water replenishment, improving the utilization rate of water resources.

[0135] 3. This invention, by setting up an impeller 53 and a beater 517, addresses the issue of water loss in areas with lower humidity, resulting in more water droplets adhering to the plastic film 23 at those locations. When the curing liquid enters the water injection pipe 51 through the water injection hose 414, it fills the water injection pipe 51 via the impeller 53, then pushes the fourth piston 54 to the right, causing the moving rod 56 and mounting plate 57 to move to the right and compress the third spring 58. The mounting plate 57 then moves the clamping plate 519 to the right, releasing the seal of the inlet pipe 518, allowing the curing liquid to enter the spray box 520 and be sprayed out through the nozzle 521. This replenishes water to areas of the concrete that are lacking moisture. Simultaneously, due to the moving rod 517... The movement of 6 can be achieved by the inclined block 510 pushing and squeezing the moving block 514, the slider 512 and the pressing block 515 to move outward along the outer surface of the limiting rod 511, so that the fourth spring 513 is compressed. At the same time, the pressing block 515 releases its contact with the rotating shaft 52, releasing the fixing of the rotating shaft 52. As the curing liquid flows inside the water injection pipe 51, it can drive the impeller 53, the rotating shaft 52, the round block 516 and the tapping rod 517 to rotate. The rotation of the tapping rod 517 will tap the plastic film 23, thereby causing the plastic film 23 to shake and knocking the water droplets attached to the plastic film 23 onto the geotextile 15. This allows water resources to be used effectively, avoids water waste and improves the utilization rate of water resources.

[0136] This invention enables dynamic water replenishment based on the humidity requirements of different moisture-replenishing sites and flexible water replenishment at dynamic water replenishment sites.

[0137] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0138] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for curing ballastless track concrete, characterized in that, Includes the following steps: A geotextile is covered on the concrete surface to be cured. A spray assembly is set above each moisture retention point on the concrete surface to be cured. A diversion box is set above each spray assembly. The upper side of the diversion box is connected to the spray assembly through a spray flow path, and the lower side of the diversion box is connected to the spray assembly through a water replenishment flow path. A water replenishment volume adjustment component is set on the water replenishment flow path. The control lifting device drives the cover to descend. After the cover descends, it covers the concrete to be cured, the spraying assembly, and the surface humidity sensor inside the cover. The surface humidity sensor monitors the surface humidity of the concrete to be cured in real time. During the initial curing period, curing solution is injected into the distribution box. When the curing solution level in the distribution box reaches the inlet of the spray flow path, the curing solution overflows from the inlet of the spray flow path and flows into the spray assembly. The spray assembly sprays the corresponding moisturizing points. When the curing solution injected into the distribution box reaches the preset injection volume, the injection stops. After entering the curing cycle, the surface humidity collected in real time by the surface humidity sensor is compared with the preset humidity of the concrete to be cured. When the surface humidity is lower than the preset humidity, the water replenishment flow rate of the spray flow path is adjusted by the water replenishment adjustment component. After the surface humidity reaches the preset humidity, the water replenishment flow rate is adjusted to zero. After curing is completed, control the lifting device to drive the cover to open and remove the cured concrete; The comparison includes the real-time surface humidity collected by the surface humidity sensor and the preset humidity of the concrete to be cured, including: The ambient humidity around the concrete to be cured is obtained in real time using an ambient humidity sensor. The ambient wind speed around the concrete to be cured is obtained using a wind speed sensor. The ambient temperature is obtained from the first temperature sensor, and the temperature of the concrete to be cured is obtained from the second temperature sensor. The preset humidity is calculated based on the ambient wind speed, target evaporation rate, ambient temperature, and temperature of the concrete to be cured, using the concrete surface evaporation rate formula. The target evaporation rate during the concrete curing period is zero. Compare the surface humidity with the preset humidity.

2. The method for curing ballastless track concrete according to claim 1, characterized in that, The maintenance method also includes: Pre-embed stress sensors at the locations where the concrete to be cured will be placed. The stress value of the concrete to be cured is detected by a stress sensor; Compare the stress values ​​with the warning range; When the stress value is outside the warning range, adjust the water supply flow rate and ambient temperature so that the stress value reaches the warning range.

3. The method for curing ballastless track concrete according to claim 2, characterized in that, The stress value is compared with the warning range, including: The cracking risk coefficient of the concrete to be cured is calculated by dividing the stress value by the standard value of the tensile strength of the concrete to be cured. When the cracking risk coefficient is less than 0.7, it indicates that the maintenance parameters are set reasonably; If the risk coefficient is greater than 0.7, it indicates that the parameter settings are unreasonable and the water supply flow rate and ambient temperature need to be readjusted until the cracking risk coefficient drops below 0.

7.

4. The method for curing ballastless track concrete according to claim 2, characterized in that, The curing method includes, when pouring the concrete to be cured: The second temperature sensor is pre-embedded in the middle and upper part of the concrete to be cured; The stress sensors are pre-embedded in the middle, upper part and four corners of the concrete to be cured; The surface humidity sensor is attached tightly to the surface of the concrete to be cured.

5. The method for curing ballastless track concrete according to claim 1, characterized in that, The maintenance method also includes: Obtain the dimensional parameters of the concrete to be cured, and calculate the theoretical temperature rise and fall range of the concrete to be cured based on the dimensional parameters; The temperature of the concrete to be cured, monitored by the second temperature sensor, is acquired in real time, and the actual temperature rise and fall of the concrete to be cured are calculated. Compare the actual temperature rise and fall of the concrete to be cured with the theoretical temperature rise and fall. The environment is heated or cooled by a temperature control device, so that the actual heating or cooling range is within the theoretical curve of the theoretical heating or cooling range.

6. The method for curing ballastless track concrete according to claim 1, characterized in that, The curing method also includes finishing the concrete to be cured after the initial curing period, including: The lifting device is controlled to drive the cover to rise until the concrete to be cured, covered with geotextile, appears. Remove the geotextile and perform a finishing operation. After the second finishing, cover the geotextile again and compact it. The control lifting device drives the cover to descend until the cover re-covers the concrete to be cured, which is covered with geotextile.

7. The method for curing ballastless track concrete according to claim 1, characterized in that, The maintenance method also includes: After entering the maintenance cycle, the cover is periodically shaken using a vibration device; The water droplets shaken off the cover by vibration are collected into the diversion box; And / or shake the water droplets that have fallen off the cover directly onto the geotextile.

8. The method for curing ballastless track concrete according to claim 1, characterized in that, Inject curing solution into the distribution box, including: Connect several water pumps to the water storage tank; A water outlet pipe is connected to the outlet of each water pump, and the interior of the water storage tank is connected to the top of the corresponding distribution box through the water outlet pipe; Turn on the water pump to distribute the maintenance solution into the interior of each of the distribution boxes through the outlet pipe.

9. The method for curing ballastless track concrete according to claim 1, characterized in that, The surface humidity of the concrete to be cured is monitored in real time using a surface humidity sensor, including: The upper surface of the concrete to be cured is divided into a central region and an edge region; Obtain the area of ​​the central region; The moisturizing sites are evenly distributed in the central region according to the area of ​​the region, and the adjacent moisturizing sites in the central region are spaced apart by a first distance. The moisturizing sites are arranged at second intervals in the edge region; The first distance is set to be greater than the second distance; A corresponding surface humidity sensor is installed at each moisture retention point of the concrete to be cured, and the surface humidity of the corresponding moisture retention point is detected by the surface humidity sensor.

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