A method for fine leveling the top surface of an airport runway assembled pavement base

Abstract

The present invention discloses a method for fine leveling construction of the top surface of the base layer of an airport runway assembly, which relates to the technical field of airport runway assembly construction. It adopts precise leveling equipment, uses special leveling mortar, and is combined with a precise leveling method to achieve precise leveling of the top surface of the base layer of the airport runway. The precise leveling equipment includes a track mechanism, a driving mechanism, a bracket, a material distribution device, a scraping device, a control mechanism, a battery, and a slurry cylinder. The track mechanism includes a base, a track top, a supporting wall, a leveler, and an automatic slope adjustment guide rail; the precise leveling method includes the step of adjusting the slope of the linear guide rail. During the scraping process, the present invention can automatically adjust the slope of the transition layer mortar, and can prepare a transition layer mortar layer with multiple continuous different slopes, which can greatly improve the efficiency of slope finding, reduce the difficulty of slope finding, and improve the accuracy of the slope. Through the use of special leveling mortar, the problem of airport runway slippage or water seepage can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of airport pavement assembly construction, and in particular to a method for fine leveling the top surface of an airport pavement assembly pavement base. Background Art

[0002] Before the airport runway is assembled, the foundation of the pavement needs to be processed by various processes. Before the pavement panel is installed, the super-flat coil needs to be laid on the foundation, and the super-flat coil is laid on the foundation that has been leveled. During the foundation treatment process, the transition layer mortar needs to be poured. In order to avoid water damage and slippage on the pavement, the transition layer mortar needs to have the characteristics of crack resistance, good connection, fast forming, and high early strength. The existing ordinary transition layer mortar is difficult to meet this requirement (problem one).

[0003] In addition, although airport runways require a high degree of flatness, the pavement often has a certain slope, and in special circumstances, it even has wavy undulations, in order to facilitate drainage (aircraft wheels are prone to slipping when there is water on the pavement), to ensure safe takeoff and landing of aircraft (such as increasing the slope to increase the resistance of the aircraft's landing and gliding, thereby promoting safe takeoff and landing of aircraft), and for special terrain needs (such as at an airport on the top of a mountain, the runway needs to be trimmed according to the terrain). The prior art still lacks a device that can automatically adjust the slope of the transition layer mortar, which makes it labor-intensive and ineffective to construct pavements with various slope shapes (problem two). In addition, the existing airport pavement transition layer mortar leveling device still has the problem of uneven material distribution, resulting in uneven density of the transition layer after leveling, affecting the quality of construction (problem three). Summary of the invention

[0004] The invention provides a method for fine leveling the top surface of an airport runway assembled pavement base layer, aiming to solve the first, second and third problems existing in the prior art.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A method for fine leveling the top surface of an assembled pavement base of an airport runway, using precise leveling equipment, using special leveling mortar, and combining with a fine leveling method to achieve fine leveling of the top surface of the pavement base;

[0007] The precise leveling equipment includes two parallel rail mechanisms, a bracket moving on the rail mechanism through a driving mechanism, a material distribution device fixedly connected to the front end of the bracket, a scraping device fixedly arranged at the rear end of the bracket, a control mechanism, and a battery. A slurry cylinder is fixedly arranged at the top of the bracket, and the slurry cylinder is connected to the material distribution device.

[0008] The track mechanism includes a base, a track top, a support wall, a level, and an automatic slope-adjusting guide rail. The bottom end of the base is provided with an adjustable height support foot. The upper surface of the base is parallel to the upper surface of the track top. The base and the track top are fixedly connected by the support wall. A level is provided on the upper surface of the base, and an automatic slope-adjusting guide rail is provided on the upper surface of the base inside the support wall.

[0009] The automatic slope-adjusting guide rail is used in conjunction with a scraping device, a special leveling mortar is arranged in the slurry barrel, the control mechanism is electrically connected to a battery, and is configured to control the material distribution device, the scraping device, and the automatic slope-adjusting guide rail.

[0010] Preferably, the control mechanism and the battery are both fixedly mounted on a bracket, and a track wheel is provided at the bottom end of the bracket, and the track wheel is used in conjunction with the track top;

[0011] The driving mechanism is a servo motor connected to the axle of the track wheel. The body of the servo motor is fixed to the bottom of the bracket. The side end face of the bracket is also provided with a human-machine interaction device and a display screen. The human-machine interaction device, display screen and servo motor are electrically connected to the control mechanism respectively.

[0012] Preferably, the slurry barrel is provided with a stirring device, and the stirring device comprises a driving motor fixedly arranged at the top of the slurry barrel, a vertical shaft and a stirring blade;

[0013] The vertical shaft is arranged in the slurry barrel, the top end of the vertical shaft is fixedly connected to the output shaft end of the driving motor that passes through the barrel cover of the slurry barrel, the outer wall of the vertical shaft is provided with stirring blades, and the barrel cover is also fixedly provided with a feed hopper.

[0014] Preferably, the material distribution device comprises a fixed plate, a transition bin, a flow pump, and a pump body, wherein the input end of the pump body is connected to the slurry barrel, and the output end is connected to the top of the transition bin through a pipe penetrating the fixed plate;

[0015] The fixed plate is arranged horizontally, and the rear end of the fixed plate is fixedly connected to the front end of the bracket, the transition bin is arranged longitudinally, and the top end of the transition bin is fixedly connected to the bottom end of the fixed plate, and a plurality of discharge pipes are evenly distributed along the left and right directions at the bottom end of the transition bin;

[0016] A flow pump is installed on the discharge pipe, and the control mechanism is electrically connected to each flow pump, the pump body and the drive motor through wires.

[0017] Preferably, the automatic slope-adjusting guide rail comprises a linear guide rail arranged on the inner side of the support wall along the direction of the track mechanism, and the two ends of the linear guide rail are respectively provided with sliding grooves penetrating the left and right end faces, and a slider is slidably connected in the sliding groove, and the two ends of the slider extend out of the sliding groove and are fixed with limit blocks;

[0018] The inner surface of the limit block is slidably connected to the side surface of the linear guide rail, the slider is slidably connected to the top and bottom of the sliding groove, the outer ends of the two limit blocks are connected to the first electric cylinder through an L-shaped bracket, the cylinder barrel of the first electric cylinder is longitudinally embedded in the base, the end of the piston rod is fixedly connected to the bottom end of the L-shaped bracket, and the end of the linear guide rail is driven to rise and fall when the two first electric cylinders at each end of the linear guide rail are extended and retracted;

[0019] A controller is provided on the track mechanism, the controller is connected to the control mechanism via a wireless signal, the first electric cylinder is electrically connected to the controller via a wire, the controller is electrically connected to a power supply, the first electric cylinders at both ends of the linear guide form a height difference between the connection points of the two ends of the linear guide and the first electric cylinders through telescoping, the control mechanism calculates the slope of the linear guide based on the height difference and the horizontal distance between the first electric cylinders at both ends of the linear guide, and adjusts the telescoping amount of the first electric cylinders at both ends of the linear guide based on the required slope.

[0020] Preferably, the scraping device comprises a reaction plate fixedly connected to the rear end of the bracket in the horizontal direction, and a second electric cylinder fixedly arranged at the lower end of the reaction plate in the longitudinal direction;

[0021] The fixed end of the second electric cylinder is fixedly connected to the lower surface of the reaction plate, and the telescopic end is fixedly connected to the horizontal plate through a pressure sensor. The end of the horizontal plate facing the bracket is slidably connected to a linear slide rail arranged at the rear end of the bracket. The bottom end of the horizontal plate is fixedly connected to a scraper in the longitudinal direction. Both ends of the bottom of the scraper are horizontally provided with fixed shafts, and rollers are installed at the ends of the fixed shafts.

[0022] The roller is used in conjunction with the upper surface of the linear guide rail on the same side, the second electric cylinder is electrically connected to the control mechanism through a wire, and the pressure sensor is signal-connected to the control mechanism through a wire.

[0023] Preferably, a visual sensor is further provided on the lower surface of the horizontal plate, and an alarm is provided on the bracket. The visual sensor is signal-connected to the control mechanism via a wire, and the alarm is electrically connected to the control mechanism via a wire.

[0024] Preferably, the special leveling mortar is composed of the following components by weight percentage:

[0025] Portland cement 400-460Kg / m 3 ;

[0026] Fly ash 150-200Kg / m 3 ;

[0027] Sand 1300-1400Kg / m 3 ;

[0028] Water 270-300Kg / m 3 ;

[0029] Water reducing agent 2.3-2.7%;

[0030] Bulking agent 1.0-1.4%;

[0031] Cellulose 1.5-2.0%;

[0032] The water reducing agent is a mixture prepared by adding water to 10% of mother liquor, 2% of early strength agent, 2.5% of viscosity modifier, and the cellulose is wood or glass fiber.

[0033] Preferably, the precise leveling method comprises the following steps:

[0034] (1) In the process of laying the transition layer mortar, the special leveling mortar is pre-filled into the slurry barrel and stirred evenly by a stirring device;

[0035] (2) Input the parameters of the laying thickness, slope, laying length and laying width of the transition layer mortar on the human-machine interaction device, press the start button, and the bracket starts to move on the track mechanism; while moving, all flow pumps spray at the designed flow rate at the same time or the flow pumps arranged at intervals spray at the designed flow rate;

[0036] (3) The control mechanism automatically adjusts the extension and retraction amount of the first electric cylinder at both ends of the linear guide rail according to the slope parameter, so that the slope of the linear guide rail matches the set slope. At the same time, the second electric cylinder adjusts the extension and retraction amount and speed according to the slope parameter, so that the roller is always in contact with the linear guide rail. During this process, when the slope changes, the control mechanism again adjusts the extension and retraction amount of the first electric cylinder at both ends of the linear guide rail to form a new slope by changing the inclination angle of the linear guide rail. The second electric cylinder adjusts the extension and retraction amount and speed based on the new slope. During this process, the scraper flattens the surface of the transition layer mortar.

[0037] (4) When the bracket moves to the other end of the track mechanism, the second electric cylinder contracts to disengage the roller from the linear guide rail, and the bracket retreats along the track mechanism. The visual sensor detects the surface of the transition layer mortar. When the control mechanism finds obvious surface defects, an alarm is issued through the alarm. After the bracket returns to the starting end of the track mechanism, the transition layer mortar leveling process is completed.

[0038] Preferably, in the step (3), when the slope changes, the first electric cylinders at both ends of the linear guide adjust their respective extension amounts under the control of the control mechanism. When adjusting the extension amount, the linear guide rotates around the contact point between the roller and the linear guide as the axis, and the control mechanism determines whether the roller maintains contact with the linear guide based on the pressure signal of the pressure sensor until the new slope adjustment is completed.

[0039] Beneficial effects of the top surface fine leveling construction method of the assembled pavement base of an airport runway of the present invention:

[0040] 1. The special leveling mortar of the present invention has the characteristics of crack resistance, good connection, fast forming and high early strength, and can effectively solve the problems of airport pavement slippage or water seepage.

[0041] 2. During the leveling process, the present invention can automatically adjust the slope of the transition layer mortar, and can prepare a transition layer mortar layer with multiple consecutive different slopes, which can greatly improve the efficiency of slope finding, reduce the difficulty of slope finding, and improve the accuracy of the slope.

[0042] 3. The present invention can evenly distribute the transition layer mortar before leveling by arranging a distribution device, so that the density of each part of the mortar is uniform, ensuring the pouring quality of the transition layer mortar layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 , a side structural diagram of the present invention (the left side is the front, the right side is the rear);

[0044] Figure 2 , a front structural schematic diagram of the transition chamber and the track mechanism of the present invention;

[0045] Figure 3 , a schematic diagram of the top view of the track mechanism of the present invention;

[0046] Figure 4 , a schematic diagram of the side view of the inner side of the track mechanism of the present invention;

[0047] Figure 5 , a schematic diagram of the matching structure of the scraper and the track mechanism of the present invention;

[0048] Figure 6 , a schematic diagram of the present invention for leveling transition layer mortar with multiple continuous slopes;

[0049] 1. Bracket; 2. Reaction plate; 3. Second electric cylinder; 4. Horizontal plate; 5. Scraper; 6. Visual sensor; 7. Linear guide rail; 8. Display screen; 9. Control mechanism; 10. Slurry barrel; 11. Drive motor; 12. Feed hopper; 13. Pump body; 14. Pipeline; 15. Fixed plate; 16. Transition bin; 17. Discharge pipe; 18. Flow pump; 19. Track mechanism; 19-1. Track top; 19-2. Support wall; 19-3. Base; 19-4. Internal thread sleeve Tube; 19-5, first electric cylinder; 19-6, linear guide; 19-7, screw; 19-8, pressure bearing; 19-9, foot pad; 20, level; 21, inner side of support wall; 22, sliding groove; 23, L-shaped bracket; 24, limit block; 25, pressure sensor; 26, fixed shaft; 27, roller; 28, top of the first slope; 29, bottom of the first slope; 30, top of the second slope; 31, bottom of the third slope; 32, transition layer mortar. DETAILED DESCRIPTION

[0050] The following describes in detail the implementation mode of the present invention in a step-by-step manner. The description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the purpose 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 direction, and a specific direction structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0052] Embodiment 1,

[0053] A method for fine leveling the top surface of the base layer of an airport runway assembly road relates to the field of airport runway assembly construction technology. It uses precise leveling equipment, special leveling mortar, and a precise leveling method to achieve precise leveling of the top surface of the base layer of the airport runway. The precise leveling equipment includes a track mechanism, a driving mechanism, a bracket, a material distribution device, a scraping device, a control mechanism, a battery, and a slurry barrel. The track mechanism includes a base, a track top, a supporting wall, a leveler, and an automatic slope adjustment guide rail. The precise leveling method includes the step of adjusting the slope of the linear guide rail.

[0054] Example 2

[0055] A precise leveling device for the top surface of an airport prefabricated pavement base, such as Figure 1-5As shown, it includes two parallel track mechanisms 19, a bracket 1 moved on the track mechanism 19 by a driving mechanism, a material distribution device fixedly connected to the front end of the bracket 1, a scraping device fixedly arranged at the rear end of the bracket 1, a control mechanism 9, and a battery (not shown in the figure). A slurry barrel 10 is fixedly arranged on the top of the bracket 1, and the slurry barrel 10 is connected to the material distribution device. The track mechanism includes a base 19-3, a track top 19-1, a support wall 19-2, a spirit level 20, and an automatic slope adjustment guide rail.

[0056] The bottom end of the base 19-3 is provided with an adjustable height support foot, the upper surface of the base 19-3 is parallel to the upper surface of the track top, the base and the track top are fixedly connected by a supporting wall, a spirit level 20 is provided on the upper surface of the base, and an automatic slope adjustment guide rail is provided on the upper surface of the base inside the supporting wall. The automatic slope adjustment guide rail is used in conjunction with a scraping device, and a special leveling mortar is provided in the slurry barrel 10. The control mechanism is electrically connected to the battery and is configured to control the material distribution device, the scraping device, and the automatic slope adjustment guide rail.

[0057] like Figure 2 As shown, the adjustable height support foot includes an internal threaded sleeve 19-4 fixed longitudinally at the bottom end of the base 19-3, a screw 19-7 threadedly connected to the internal threaded sleeve at the upper part, and a pad foot 19-9 rotatably connected to the bottom end of the screw through a pressure bearing 19-8.

[0058] like Figure 1 As shown, the control mechanism 9 and the battery are both fixedly mounted on the bracket 1. A track wheel is provided at the bottom end of the bracket 1. The track wheel is used in conjunction with the track top 19-1. The driving mechanism is a servo motor (not shown in the figure) connected to the wheel axle of the track wheel. The body of the servo motor is fixed at the bottom of the bracket 1. A human-machine interaction device (not shown in the figure) and a display screen 8 are also provided on the side end face of the bracket 1. The human-machine interaction device, the display screen 8 and the servo motor are electrically connected to the control mechanism 9 respectively.

[0059] like Figure 1 As shown, the slurry barrel 10 is provided with a stirring device, and the stirring device includes a driving motor 11 fixedly arranged at the top of the slurry barrel 10, a vertical shaft (not shown in the figure) and a stirring blade (not shown in the figure), the vertical shaft is arranged in the slurry barrel 10, the top of the vertical shaft is fixedly connected to the output shaft end of the driving motor 11 passing through the barrel cover of the slurry barrel, the outer wall of the vertical shaft is provided with a stirring blade, and the barrel cover is also fixedly provided with a feed hopper 12.

[0060] like Figure 1 , 2As shown, the material distribution device includes a fixed plate 15, a transition bin 16, a flow pump 18, and a pump body 13. The input end of the pump body 13 is connected to the slurry barrel 10, and the output end is connected to the top of the transition bin 16 through a pipe 14 that penetrates the fixed plate 15. The fixed plate 15 is arranged horizontally, and the rear end of the fixed plate 15 is fixedly connected to the front end of the bracket 1. The transition bin 16 is arranged longitudinally, and the top of the transition bin 16 is fixedly connected to the bottom end of the fixed plate 15. A plurality of discharge pipes 17 are evenly distributed along the left and right directions at the bottom end of the transition bin 16. The discharge pipe 17 is installed with a flow pump 18. The control mechanism 9 is electrically connected to each flow pump 18, the pump body 13, and the drive motor 11 through wires.

[0061] like Figure 2-5 As shown, the automatic slope-adjusting guide rail includes a linear guide rail 19-6 arranged on the inner side of the support wall along the direction of the track mechanism, and both ends of the linear guide rail 19-6 are respectively provided with sliding grooves 22 passing through the left and right end surfaces, and a slider is slidably connected in the sliding groove 22.

[0062] Both ends of the slider extend out of the sliding groove and are fixedly provided with limit blocks 24. The inner surface of the limit block 24 is slidably connected to the side surface of the linear guide 19-6. The slider is slidably connected to the top and bottom of the sliding groove 22. The outer ends of the two limit blocks 24 are connected to the first electric cylinder 19-5 through an L-shaped bracket 23. The cylinder barrel of the first electric cylinder 19-5 is longitudinally embedded in the base 19-3, and the end of the piston rod is fixedly connected to the bottom end of the L-shaped bracket 23. When the two first electric cylinders 19-5 at each end of the linear guide 19-6 are extended and retracted, the end of the linear guide is driven to rise and fall. A controller (not shown in the figure) is provided on the track mechanism.

[0063] The controller is connected to the control mechanism 9 via wireless signals, the first electric cylinder 19-5 is electrically connected to the controller via a wire, the controller is electrically connected to a power supply, and the first electric cylinders 19-5 at both ends of the linear guide 19-6 form a height difference between the connection points of the two ends of the linear guide 19-6 and the first electric cylinder 19-5 through telescopic operation. The control mechanism calculates the slope of the linear guide based on the height difference and the horizontal distance between the first electric cylinders at both ends of the linear guide, and adjusts the telescopic amount of the first electric cylinders 19-5 at both ends of the linear guide based on the required slope.

[0064] like Figure 1 , 5As shown, the scraping device includes a reaction plate 2 fixedly connected to the rear end of the bracket 1 in the horizontal direction, and a second electric cylinder 3 fixedly arranged at the lower end of the reaction plate 2 in the longitudinal direction. The fixed end of the second electric cylinder 3 is fixedly connected to the lower surface of the reaction plate 2, and the telescopic end is fixedly connected to the horizontal plate 4 through a pressure sensor 25. The end of the horizontal plate 4 facing the bracket 1 is slidably connected to the linear slide rail 7 arranged at the rear end of the bracket 1. The bottom end of the horizontal plate 4 is fixedly connected to a scraper 5 in the longitudinal direction. Fixed shafts 26 are provided at both ends of the bottom of the scraper 5 in the horizontal direction. Rollers 27 are installed at the ends of the fixed shafts. The rollers 27 are used in conjunction with the upper surface of the linear guide 19-6 on the same side. The second electric cylinder 19-5 is electrically connected to the control mechanism 9 through a wire, and the pressure sensor 25 is signal-connected to the control mechanism 9 through a wire.

[0065] like Figure 1 As shown, a visual sensor 6 is also provided on the lower surface of the horizontal plate 4, and an alarm (not shown) is provided on the bracket 1. The visual sensor 6 is connected to the control mechanism 9 by a wire, and the alarm is electrically connected to the control mechanism 9 by a wire.

[0066] The specific use principle of this embodiment is detailed in Example 3.

[0067] Embodiment 2,

[0068] On the basis of Example 1, this example discloses: a method for fine leveling construction of the top surface of the prefabricated pavement base of an airport runway, using precise leveling equipment, using special leveling mortar, and combining with a fine leveling method.

[0069] The special leveling mortar is composed of the following components by weight percentage:

[0070] Portland cement 400-460Kg / m 3 ;

[0071] Fly ash 150-200Kg / m 3 ;

[0072] Sand 1300-1400Kg / m 3 ;

[0073] Water 270-300Kg / m 3 ;

[0074] Water reducing agent 2.3-2.7%;

[0075] Bulking agent 1.0-1.4%;

[0076] Cellulose 1.5-2.0%;

[0077] The water reducing agent is a mixture prepared by adding water to 10% of mother liquor, 2% of early strength agent, 2.5% of viscosity modifier, and the cellulose is wood or glass fiber.

[0078] The preparation method of the above-mentioned special leveling mortar is as follows:

[0079] 1) First, add water to each component of the water reducer according to the proportion and mix;

[0080] 2) Weigh cement, fly ash, sand and other raw materials and dry mix them for 30 seconds, then add half of the water and mix for 1 minute, then add the admixture and the remaining water.

[0081] Physical properties of special leveling mortar: 3d compressive strength is M20.

[0082] Advantages of the special leveling mortar of the present invention:

[0083] 1) The present invention prepares a special leveling mortar by mixing a variety of materials, which can be used on site after adding water and stirring. The construction is convenient and simple, the construction and workability are good, and the on-site construction is convenient.

[0084] 2) The present invention solves the bonding problem between the precast concrete slab and the underlying bearing layer, better fills the gap between the precast concrete slab and the underlying bearing layer, prevents water from damaging the precast concrete slab and the underlying bearing layer, and ensures construction quality and driving safety.

[0085] 3) The addition of cellulose and a binder to the special leveling mortar of the present invention effectively ensures the adhesion of the mortar itself and prevents quality problems caused by mortar layer fracture.

[0086] Embodiment 3,

[0087] On the basis of Examples 1 and 2, this Example further discloses:

[0088] A construction method of an airport prefabricated pavement base top surface precision leveling device comprises the following steps:

[0089] (1) In the process of laying the transition layer mortar, the special leveling mortar is pre-filled into the slurry barrel and stirred evenly by a stirring device;

[0090] (2) Input the parameters of the laying thickness, slope, laying length and laying width of the transition layer mortar on the human-machine interaction device, press the start button, and the bracket 1 starts to move on the track mechanism; when moving, all the flow pumps 18 spray material at the designed flow rate at the same time or the flow pumps 18 arranged at intervals spray material at the designed flow rate, in order to make the mortar evenly distributed, which is conducive to the mortar having nearly the same density during subsequent leveling;

[0091] (3) The control mechanism automatically adjusts the extension and retraction amount of the first electric cylinder 19-5 at both ends of the linear guide 19-6 according to the slope parameter, so that the slope of the linear guide is consistent with the set slope. At the same time, the second electric cylinder 3 adjusts the extension and retraction amount and speed according to the slope parameter, so that the roller 27 is always in contact with the linear guide. In this process, when the slope changes, the control mechanism again adjusts the extension and retraction amount of the first electric cylinder at both ends of the linear guide to form a new slope by changing the inclination angle of the linear guide. The second electric cylinder adjusts the extension and retraction amount and speed based on the new slope. In this process, the scraper 5 flattens the surface of the transition layer mortar.

[0092] (4) When the bracket moves to the other end of the track mechanism, the second electric cylinder 3 contracts, causing the roller 27 to disengage from the linear guide 19-6, and the bracket 1 retreats along the track mechanism. The visual sensor 6 detects the surface of the transition layer mortar. When the control mechanism 9 finds obvious surface defects, an alarm is issued through the alarm. After the bracket returns to the starting end of the track mechanism, the transition layer mortar leveling process is completed.

[0093] Embodiment 4,

[0094] Based on Example 3, this example further discloses:

[0095] like Figure 1-6 As shown, in the step (3), when the slope changes, the first electric cylinders 19-5 at both ends of the linear guide adjust their respective extension amounts under the control of the control mechanism 9. When adjusting the extension amount, the linear guide 19-6 rotates around the contact portion between the roller 27 and the linear guide, and the control mechanism determines whether the roller maintains contact with the linear guide based on the pressure signal of the pressure sensor 25 until the new slope adjustment is completed.

[0096] like Figure 6 As shown, the transition layer mortar 32 is designed with multiple continuous slopes. When the scraper moves to the bottom 29 of the first slope, it reaches the starting point of the second slope. The second slope is formed by adjusting the inclination angle of the linear guide rail. When it reaches the top 30 of the second slope, a new slope is formed by rotating the linear guide rail, and then the third slope is scraped until the scraper moves to the bottom 31 of the third slope.

Claims

1. A method for fine leveling the top surface of an airport runway prefabricated pavement base layer, characterized by: Adopt precise leveling equipment, use special leveling mortar, and cooperate with precise leveling methods to achieve precise leveling of the top surface of the road base; The precise leveling equipment includes two parallel rail mechanisms, a bracket moving on the rail mechanism through a driving mechanism, a material distribution device fixedly connected to the front end of the bracket, a scraping device fixedly arranged at the rear end of the bracket, a control mechanism, and a battery. A slurry cylinder is fixedly arranged at the top of the bracket, and the slurry cylinder is connected to the material distribution device. The track mechanism includes a base, a track top, a support wall, a level, and an automatic slope-adjusting guide rail. The bottom end of the base is provided with an adjustable height support foot. The upper surface of the base is parallel to the upper surface of the track top. The base and the track top are fixedly connected by the support wall. A level is provided on the upper surface of the base, and an automatic slope-adjusting guide rail is provided on the upper surface of the base inside the support wall. The automatic slope-adjusting guide rail is used in conjunction with the scraping device, a special leveling mortar is provided in the slurry barrel, the control mechanism is electrically connected to the battery, and is configured to control the material distribution device, the scraping device, and the automatic slope-adjusting guide rail; the control mechanism and the battery are both fixed on the bracket, a track wheel is provided at the bottom end of the bracket, and the track wheel is used in conjunction with the track top; The driving mechanism is a servo motor connected to the axle of the track wheel, the body of the servo motor is fixed to the bottom of the bracket, and the side end surface of the bracket is also provided with a human-machine interaction device and a display screen, and the human-machine interaction device, the display screen, and the servo motor are electrically connected to the control mechanism respectively; The slurry barrel is provided with a stirring device, and the stirring device comprises a driving motor fixedly arranged at the top of the slurry barrel, a vertical shaft and a stirring blade; The vertical shaft is arranged in the slurry barrel, the top end of the vertical shaft is fixedly connected to the output shaft end of the driving motor that passes through the barrel cover of the slurry barrel, the outer wall of the vertical shaft is provided with stirring blades, and the barrel cover is also fixedly provided with a feed hopper; The material distribution device comprises a fixed plate, a transition bin, a flow pump, and a pump body. The input end of the pump body is connected to the slurry barrel, and the output end is connected to the top of the transition bin through a pipeline penetrating the fixed plate. The fixed plate is arranged horizontally, and the rear end of the fixed plate is fixedly connected to the front end of the bracket, the transition bin is arranged longitudinally, and the top end of the transition bin is fixedly connected to the bottom end of the fixed plate, and a plurality of discharge pipes are evenly distributed along the left and right directions at the bottom end of the transition bin; A flow pump is installed on the discharge pipe, and the control mechanism is electrically connected to each flow pump, the pump body, and the drive motor through wires; The automatic slope-adjusting guide rail comprises a linear guide rail arranged on the inner side of the support wall along the direction of the track mechanism, and the two ends of the linear guide rail are respectively provided with sliding grooves penetrating the left and right end faces, and a slider is slidably connected in the sliding groove, and the two ends of the slider extend out of the sliding groove and are fixed with limit blocks; The inner surface of the limit block is slidably connected to the side surface of the linear guide rail, the slider is slidably connected to the top and bottom of the sliding groove, the outer ends of the two limit blocks are connected to the first electric cylinder through an L-shaped bracket, the cylinder barrel of the first electric cylinder is longitudinally embedded in the base, the end of the piston rod is fixedly connected to the bottom end of the L-shaped bracket, and the end of the linear guide rail is driven to rise and fall when the two first electric cylinders at each end of the linear guide rail are extended and retracted; The track mechanism is provided with a controller, the controller is connected to the control mechanism via a wireless signal, the first electric cylinder is electrically connected to the controller via a wire, the controller is electrically connected to a power source, the first electric cylinders at both ends of the linear guide form a height difference between the connection points of the two ends of the linear guide and the first electric cylinders through telescoping, the control mechanism calculates the slope of the linear guide according to the height difference and the horizontal distance between the first electric cylinders at both ends of the linear guide, and adjusts the telescoping amount of the first electric cylinders at both ends of the linear guide according to the required slope; The scraping device comprises a reaction plate fixedly connected to the rear end of the bracket in the horizontal direction, and a second electric cylinder fixedly arranged at the lower end of the reaction plate in the longitudinal direction; The fixed end of the second electric cylinder is fixedly connected to the lower surface of the reaction plate, and the telescopic end is fixedly connected to the horizontal plate through a pressure sensor. The end of the horizontal plate facing the bracket is slidably connected to a linear slide rail arranged at the rear end of the bracket. The bottom end of the horizontal plate is fixedly connected to a scraper in the longitudinal direction. Both ends of the bottom of the scraper are horizontally provided with fixed shafts, and rollers are installed at the ends of the fixed shafts. The roller is used in conjunction with the upper surface of the linear guide rail on the same side, the second electric cylinder is electrically connected to the control mechanism through a wire, and the pressure sensor is signal-connected to the control mechanism through a wire; The precise leveling method comprises the following steps: (1) In the process of laying the transition layer mortar, the special leveling mortar is pre-filled into the slurry barrel and stirred evenly by a stirring device; (2) Input the parameters of the laying thickness, slope, laying length and laying width of the transition layer mortar on the human-machine interaction device, press the start button, and the bracket starts to move on the track mechanism; while moving, all flow pumps spray at the designed flow rate at the same time or the flow pumps arranged at intervals spray at the designed flow rate; (3) The control mechanism automatically adjusts the extension and retraction amount of the first electric cylinder at both ends of the linear guide rail according to the slope parameter, so that the slope of the linear guide rail matches the set slope. At the same time, the second electric cylinder adjusts the extension and retraction amount and speed according to the slope parameter, so that the roller is always in contact with the linear guide rail. During this process, when the slope changes, the control mechanism again adjusts the extension and retraction amount of the first electric cylinder at both ends of the linear guide rail to form a new slope by changing the inclination angle of the linear guide rail. The second electric cylinder adjusts the extension and retraction amount and speed based on the new slope. During this process, the scraper flattens the surface of the transition layer mortar. (4) When the bracket moves to the other end of the track mechanism, the second electric cylinder contracts to disengage the roller from the linear guide rail, and the bracket retreats along the track mechanism. The visual sensor detects the surface of the transition layer mortar. When the control mechanism finds obvious surface defects, an alarm is issued through the alarm. After the bracket returns to the starting end of the track mechanism, the transition layer mortar leveling process is completed; In the step (3), when the slope changes, the first electric cylinders at both ends of the linear guide adjust their respective extension amounts under the control of the control mechanism. When adjusting the extension amount, the linear guide rotates around the contact point between the roller and the linear guide as the axis, and the control mechanism determines whether the roller maintains contact with the linear guide based on the pressure signal of the pressure sensor until the new slope adjustment is completed.

2. A method for fine leveling the top surface of an airport runway prefabricated pavement base layer as claimed in claim 1, characterized in that: A visual sensor is also provided on the lower surface of the horizontal plate, and an alarm is provided on the bracket. The visual sensor is connected to the control mechanism signal through a wire, and the alarm is electrically connected to the control mechanism through a wire.

3. A method for fine leveling the top surface of an airport runway prefabricated pavement base layer as claimed in claim 1, characterized in that: The special leveling mortar is composed of the following components by weight percentage: Portland cement 400-460Kg / m 3 ; Fly ash 150-200Kg / m 3 ; Sand 1300-1400Kg / m 3 ; Water 270-300Kg / m 3 ; Water reducing agent 2.3-2.7%; Bulking agent 1.0-1.4%; Cellulose 1.5-2.0%; The water reducing agent is a mixture prepared by adding water to 10% of mother liquor, 2% of early strength agent, 2.5% of viscosity modifier, and the cellulose is wood or glass fiber.

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