Recycled aggregate anti-blocking pervious concrete pavement and construction method thereof

Abstract

The invention discloses a recycled aggregate anti-blocking pervious concrete pavement and a construction method thereof. The recycled aggregate anti-blocking pervious concrete pavement comprises the following layered structures: a plain soil foundation layer; the regenerated gravel layer is laid on the plain soil base layer; the permeable geotextile layer covers the regenerated gravel layer; the recycled aggregate permeable concrete layer is arranged on the permeable geotextile layer; the reinforced pervious concrete layer is positioned above the recycled aggregate pervious concrete layer; the anti-clogging water-permeable concrete pavement has the advantages of anti-clogging and durability, flowing soil particles in water are filtered through the water-permeable geotextile, the water-permeable concrete bearing layer is prevented from being clogged, water flow is guaranteed to pass through, and the service life of the pavement is prolonged; the water glass and the sodium fluosilicate solution are used for pretreating the recycled aggregate, so that the surface performance of the recycled aggregate is improved, an interface transition area of slurry and the aggregate is optimized, and the problem of low concrete strength in recycled aggregate application is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete structures, and specifically to a regenerated aggregate anti-blocking permeable concrete pavement and its construction method. Background Art

[0003] Conventional permeable concrete pavements have the following technical defects in actual applications: First, due to the open pore structure, the pavement is easily blocked by particulate matters such as sediment, resulting in a significant attenuation of the permeable performance over time, thereby reducing the service life of the permeable concrete pavement; Second, the recycled aggregates have high water absorption and low strength due to the presence of old mortar, and the durability of the prepared permeable concrete is poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a regenerated aggregate anti-blocking permeable concrete pavement and its construction method to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A regenerated aggregate anti-blocking permeable concrete pavement includes the following layered structure: Plain soil base layer; Recycled sand and gravel layer laid on the plain soil base layer; Geotextile layer laid on the recycled sand and gravel layer; Recycled aggregate permeable concrete layer provided on the geotextile layer; Strong solid permeable concrete layer located above the recycled aggregate permeable concrete layer; And a transparent sealing layer covering the surface of the strong solid permeable concrete layer.

[0006] Further, the recycled aggregate permeable concrete layer is prepared from cement, mineral admixture, recycled aggregate, sodium silicate, sodium fluorosilicate and water in a certain weight ratio; after the mixed solution of sodium silicate and sodium fluorosilicate pre-treats the recycled aggregate, the remaining ingredients are added for reaction.

[0007] Further, the strong solid permeable concrete layer is prepared from aggregate, cement, water, strengthening agent and additive in a certain weight ratio; the strengthening agent includes concrete superplasticizer, retarder, polymer powder, water retention agent and high-purity silica; the additive includes powder assistant and liquid assistant, the powder assistant includes polymer powder, and the liquid assistant includes water retention agent and dispersant.

[0008] The present invention also provides a construction method for the above-mentioned regenerated aggregate anti-blocking permeable concrete pavement, including the following steps: S1. Subgrade treatment: Ram or compact the original soil of the roadbed to form a plain soil base layer; lay a blind pipe on the plain soil base layer and fill the stone around the blind pipe; S2. Cushion laying: Process construction waste into recycled crushed stones and spread them flat on the plain soil base layer to form a recycled sand and gravel layer; S3. Geotextile laying: Lay a permeable geotextile on the recycled sand and gravel layer; S4. Concrete pouring: Spread recycled aggregate permeable concrete and strong permeable concrete in sequence; and then carry out compaction, polishing and curing work in sequence after spreading; S5. Re-treatment: After curing, cut and fill the joints of the road surface; finally, clean and dry the road surface and then spray a sealant to form a transparent sealing layer; Among them, the spreading, compaction, polishing and curing work are all carried out by a construction device. The construction device includes a first protection component and a second protection component. The first protection component and the second protection component are respectively installed on the left and right sides of the roadbed, and a moving device is connected between the first protection component and the second protection component. An engineering device is installed on the moving device in a lifting manner. The engineering device is one of a paver, a compactor, a polisher and a curing machine. The moving device drives the working device to move along the direction of the roadbed; both the first protection component and the second protection component are composed of several protection parts, and several protection parts on the same side are spliced together along the length direction of the roadbed.

[0009] Further, the protection part includes two support columns. A support is fixed at the bottom of the support column. The tops of the two support columns are connected with a cross beam. A guide channel is opened at the inner end of the cross beam. The moving device includes two support seats and support rods. The two support seats are respectively installed on the protection parts on the left and right sides. A roller is rotatably connected to the outer end of the support seat. The roller moves in the corresponding guide channel on one side. A first motor is installed on the support seat. The first motor is used to drive the roller to rotate. A connecting seat is arranged at the inner end of the support seat. Several fixing grooves are opened on the connecting seat. Several support rods are connected between the support seats on both sides, and the end of the support rod is detachably installed in the fixing groove. A moving seat is slidably arranged on the support rod. A power component is arranged on the support seat. The power component is used to drive the moving seat to move horizontally along the support rod. An installation seat is arranged at the bottom end of the moving seat. The installation seat is used to install the engineering device.

[0010] Further, the power component includes a second motor, a driving rope and a wire wheel. The second motor is installed on the support seat. A wire wheel is arranged on the output shaft of the second motor. A driving rope is arranged on the wire wheel. Adjusting seats are arranged at the left and right ends of the moving seat. The other ends of the driving ropes on both sides are respectively connected to the adjusting seats on the corresponding sides. The second motor drives the moving seat to move by controlling the winding and unwinding of the driving rope.

[0011] Further, a telescopic cylinder is provided on the support base. The piston end of the telescopic cylinder penetrates through the bottom of the support base and extends downward. A bearing seat is fixed to the end of the piston rod of the telescopic cylinder. A driving rod is detachably connected between the bearing seats on both sides. The mounting base and the moving base are connected by a plurality of telescopic rods. A sliding cylinder is provided in the middle of the top end of the mounting base, and the sliding cylinder is slidably sleeved on the surface of the driving rod.

[0012] Further, a plurality of buffer grooves are formed on the outer end surface of the support column. A buffer block is slidably arranged in each buffer groove, and a spring is connected between the buffer block and the buffer groove. The other end of each buffer block is connected to an arc-shaped plate. A plurality of limiting grooves are formed on the other end surface of the arc-shaped plate, and a fixing rod is connected to the bottom end of the limiting groove; An elastic protective belt is connected between two adjacent fixing rods on the same horizontal plane, and the elastic protective belt is detachably sleeved on the fixing rod.

[0013] Further, a sound insulation board is connected between the inner end surfaces of the two support columns, and a reflective coating is provided on the outer end surface of the sound insulation board.

[0014] Further, a clamping block is provided at one end of the cross beam, and a clamping hole adapted thereto is provided at the other end. Corresponding threaded holes are provided in the clamping hole and the clamping block; A reel is provided on the outer end surface of the support base.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The concrete pavement structure of the present invention has the advantages of anti-blocking and durability. The water and soil flow particles in the water are filtered through the permeable geotextile to prevent the permeable concrete bearing layer from being blocked, ensure the water flow through, and extend the service life of the road surface; The recycled aggregate is pretreated with sodium silicate and sodium fluorosilicate solution to improve its surface performance and optimize the interfacial transition zone between the paste and the aggregate, and solve the problem of low concrete strength in the application of recycled aggregate.

[0016] 2. The overall structure of the construction device of the present invention is simple and convenient for loading and unloading. Through the detachable support rod, driving rod and driving rope drive design, it can adapt to road surface construction of different widths; And through the detachable installation design of the fixed seat and the engineering device, the automatic operation of construction work such as paving, compaction, polishing and maintenance is realized, which saves time and effort, improves construction efficiency and has strong adaptability.

[0017] 3. The protective parts of the present invention are spliced to form a blocking barrier to prevent unauthorized personnel from entering the construction site, and at the same time provide support and guide functions for the mobile device; The multi-stage buffer structure provided thereon can absorb most of the impact energy, reduce the reaction force on the impacted object, and reduce the risk of secondary injury, achieving the effect of safety protection. Description of the Drawings

[0018] Figure 1Schematic diagram of the structure of the concrete pavement of the present invention; Figure 2 Right side schematic diagram of the construction device of the present invention; Figure 3 Left side schematic diagram of the construction device of the present invention; Figure 4 is Figure 3 Partial enlarged view of part A in Figure 5 is Figure 3 Partial enlarged view of part B in Figure 6 Cross-sectional view of the support column of the present invention; Figure 7 Front view of the construction device of the present invention.

[0019] In the figure, plain soil foundation layer - 1, recycled sand and gravel layer - 2, permeable geotextile layer - 3, recycled aggregate permeable concrete layer - 4, strong permeable concrete layer - 5, transparent sealing layer - 6, protective member - 7, support column - 8, support - 9, cross beam - 10, guiding path - 11, support seat - 12, support rod - 13, connecting seat - 14, fixed groove - 15, moving seat - 16, mounting seat - 17, driving rope - 18, wire wheel - 19, adjusting seat - 20, telescopic cylinder - 21, bearing seat - 22, driving rod - 23, telescopic rod - 24, sliding cylinder - 25, buffer groove - 26, buffer block - 27, spring - 28, limiting groove - 29, fixed rod - 30, elastic protective belt - 31, sound insulation board - 32, clamping block - 33, clamping hole - 34, winding drum - 35, arc plate - 36. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figure 1 shown, a recycled aggregate anti - clogging permeable concrete pavement includes the following layered structures: a plain soil foundation layer 1; a recycled sand and gravel layer 2 laid on the plain soil foundation layer 1; a permeable geotextile layer 3 covering the recycled sand and gravel layer 2; a recycled aggregate permeable concrete layer 4 provided on the permeable geotextile layer 3; a strong permeable concrete layer 5 located above the recycled aggregate permeable concrete layer 4; and a transparent sealing layer 6 covering the surface of the strong permeable concrete layer 5.

[0022] The upper layer of the concrete pavement uses strong and solid permeable concrete with a hard and dense texture, and the lower layer uses recycled aggregate permeable concrete. The permeable geotextile is laid on the recycled graded sand and gravel. The permeable geotextile has the function of filtering the flowing soil particles in the water, preventing the clogging of the permeable concrete bearing layer (the plain soil base layer 1 and the recycled sand and gravel layer 2), ensuring the smooth passage of water flow in the permeable concrete bearing layer, and extending the service life of the permeable concrete bearing layer.

[0023] The recycled aggregate permeable concrete has a series of color formulas, and the recycled aggregate permeable concrete with different colors, textures and particle sizes can be arbitrarily matched to meet the laying construction requirements of different environmental and personalized decorative styles. It is natural and beautiful, with flexible patterns, greatly improving the natural landscape decoration effect of the road surface.

[0024] In this embodiment, the recycled aggregate permeable concrete layer 4 is prepared from cement, mineral admixture, recycled aggregate, sodium silicate, sodium fluorosilicate and water in a certain weight ratio; after the mixed solution of sodium silicate and sodium fluorosilicate pretreats the recycled aggregate, the remaining ingredients are added for reaction; Using the solution of sodium silicate and sodium fluorosilicate to pretreat the recycled aggregate can modify its surface, improve the problem of low concrete strength caused by the weak interface transition zone during the application of recycled aggregate, fill the cracks formed during the crushing of recycled aggregate, and solidify the loose surface of the recycled aggregate; most importantly, when preparing the recycled aggregate permeable concrete, the surface of the recycled aggregate can react with cement or mineral admixture (metakaolin) in the liquid phase environment, optimize the interface transition zone between the paste and the aggregate, and achieve the purpose of improving strength.

[0025] In this embodiment, the strong and solid permeable concrete layer 5 is prepared from aggregate, cement, water, strengthening agent and additive in a certain weight ratio; the strengthening agent includes concrete superplasticizer, retarder, polymer powder, water retention agent and high-purity silica; the additive includes powder additive and liquid additive, and the powder additive includes polymer powder, and the polymer powder greatly improves the point bonding strength between aggregates through cross-linking; the liquid additive includes water retention agent and dispersant; The main function of the liquid additive is to improve the lubricity and plasticizing performance of the concrete mixture. Mixing with the aggregate first during the mixing process can make the surface of the material evenly moist, ensure the uniform dispersion of the subsequent powder materials, effectively extend the workable time of the permeable concrete, prevent premature hardening, and improve the fluidity and paving efficiency of the mixture.

[0026] Please refer to Figures 2 to 7 As shown, this embodiment also includes a construction method applied to the above-mentioned recycled aggregate anti-clogging permeable concrete pavement, including the following steps: S1. Subgrade treatment: Compact or press the original soil of the roadbed to form a plain soil base layer 1; lay a blind pipe on the plain soil base layer 1, and fill the stone materials around the blind pipe. The bottom and middle of the blind pipe are filled with larger crushed stones or pebbles (particle size 20mm - 40mm). On both sides and the upper part of the crushed stones or pebbles, a filter layer is made of finer-grained aggregates (medium sand, coarse sand, gravel) in a certain proportion and in layers (layer thickness about 15mm). S2. Cushion laying: Process construction waste into recycled crushed stones and spread them flat on the plain soil base layer 1 to form a recycled sand and gravel layer 2. S3. Laying geotextile: Lay a permeable geotextile on the recycled sand and gravel layer 2. S4. Concrete pouring: Spread recycled aggregate permeable concrete and strong permeable concrete in sequence; and after the spreading is completed, carry out compaction, polishing and curing work in sequence. S5. Re-treatment: After curing, cut and fill the joints of the road surface; finally, after cleaning and drying the road surface, spray a sealant to form a transparent sealing layer 6, enhancing durability and aesthetics, and preventing the pores of the permeable concrete from being contaminated and blocked due to long time.

[0027] Among them, the spreading, compaction, polishing and curing work are all carried out by a construction device. The construction device includes a first protection component and a second protection component. The first protection component and the second protection component are respectively installed on the left and right sides of the subgrade, and a moving device is connected between the first protection component and the second protection component. An engineering device is installed on the moving device in a lifting manner. The engineering device is one of a paver, a compactor, a polisher and a curing machine. The moving device drives the working device to move along the direction of the subgrade; both the first protection component and the second protection component are composed of a number of protection parts 7, and a number of protection parts 7 on the same side are spliced together along the length direction of the roadbed.

[0028] In this embodiment, the protection part 7 includes two support columns 8. A support 9 is fixed at the bottom of the support column 8. The tops of the two support columns 8 are connected with a cross beam 10. A guiding channel 11 is opened at the inner end of the cross beam 10. The moving device includes two support seats 12 and support rods 13. The two support seats 12 are respectively installed on the protection parts 7 on the left and right sides. The outer end of the support seat 12 is rotatably connected with a roller, and the roller moves in the guiding channel 11 on the corresponding side. A first motor is installed on the support seat 12 for driving the roller to rotate. A connecting seat 14 is arranged at the inner end of the support seat 12, and a number of fixing grooves 15 are opened on the connecting seat 14. A number of support rods 13 are connected between the two support seats 12 on both sides, and the ends of the support rods 13 are detachably installed in the fixing grooves 15. A moving seat 16 is slidably arranged on the support rod 13. A power component is arranged on the support seat 12 for driving the moving seat 16 to make a horizontal movement along the support rod 13. An installation seat 17 is arranged at the bottom end of the moving seat 16 for installing the engineering device. Before carrying out construction work, install the protective parts 7 on both sides of the roadbed. The support 9 is connected to the road surface through spikes, and the protective parts 7 on the same side are spliced together. At this time, the spliced protective parts 7 form a blocking barrier to prevent unauthorized personnel from entering the construction site. Then, install the two support seats 12 on the crossbeams 10 of the protective parts 7 on both sides respectively. Then, select a support rod 13 with a suitable length according to the distance between the two support seats 12 on both sides. After installing the moving seat 16 on the support rod 13, fix the two ends of the support rod 13 to the connecting seats 14 on both sides respectively, and then connect the power assembly to the moving seat 16; According to the construction requirements, the staff installs the corresponding engineering device on the mounting seat 17. At this time, the first motor drives the moving seat 16 to move back and forth in the length direction of the roadbed, and the power assembly drives the moving seat 16 to move back and forth in the width direction of the roadbed, so as to drive the engineering device below it to move along the concrete road surface to realize automatic operation.

[0029] In this embodiment, the power assembly includes a second motor, a driving rope 18 and a wire wheel 19. The second motor is installed on the support seat 12. A wire wheel 19 is arranged on the output shaft of the second motor. A driving rope 18 is arranged on the wire wheel 19. Adjusting seats 20 are arranged at the left and right ends of the moving seat 16. The other ends of the two driving ropes 18 are respectively connected to the adjusting seats 20 on the corresponding sides. The second motor drives the moving seat 16 to move by controlling the winding and unwinding of the driving rope 18; When the moving seat 16 needs to move to the right, at this time, the wire wheel 19 on the right rotates clockwise to wind up the driving rope 18 on the right, and the wire wheel 19 on the left rotates counterclockwise to unwind the driving rope 18 on the left, so as to pull the moving seat 16 to move to the right through the driving rope 18 on the right. Similarly, when the moving seat 16 needs to move to the left, and then adjust the construction of the engineering device in the width direction of the road surface by moving the moving seat 16 left and right; Through the design of driving by the driving rope 18, it can adapt to road surface construction of different widths. No matter how long the distance between the two support seats 12 on both sides is, just wind up the driving rope 18 to a straight state during installation.

[0030] In this embodiment, a telescopic cylinder 21 is arranged on the support seat 12. The piston end of the telescopic cylinder 21 penetrates the bottom of the support seat 12 and extends downward. A bearing seat 22 is fixed at the end of the piston rod of the telescopic cylinder 21. A driving rod 23 is detachably connected between the two bearing seats 22 on both sides. The mounting seat 17 and the moving seat 16 are connected by a plurality of telescopic rods 24. A sliding cylinder 25 is arranged in the middle of the top end of the mounting seat 17. The sliding cylinder 25 is slidably sleeved on the surface of the driving rod 23; During installation, a driving rod 23 of a suitable length is selected according to the width of the construction roadbed. After the driving rod 23 passes through the slide tube 25, the two ends of the driving rod 23 are respectively fixed on the bearing seats 22 of the telescopic cylinders 21 on both sides. During construction work, the driving rod 23 is driven to rise and fall by the telescopic cylinder 21, thereby synchronously driving the mounting seat 17 to be raised and lowered. The reason why the telescopic cylinder 21 is arranged on the support seat 12 instead of being directly installed on the moving seat 16 is that, on the one hand, the arrangement of electrical components on the moving seat 16 can be reduced, and the movement of cables can be facilitated during construction. On the other hand, the overall weight of the moving seat 16 can be reduced, the load on the support rod 13 can be reduced, and the movement of the moving seat 16 on the support rod 13 can be made more stable.

[0031] In this embodiment, a plurality of buffer grooves 26 are provided on the outer end surface of the support column 8, and a buffer block 27 is slidably arranged in each buffer groove 26, and a spring 28 is connected between the buffer block 27 and the buffer groove 26, and the other end of each buffer block 27 is connected to an arc plate 36, and the other end surface of the arc plate 36 is provided with a plurality of limiting grooves 29, and the bottom end of the limiting groove 29 is connected to a fixing rod 30; an elastic protective belt 31 is connected between two adjacent fixing rods 30 on the same horizontal plane, and the elastic protective belt 31 is detachably sleeved on the fixing rod 30. When a single elastic protective belt 31 is damaged, it can be quickly replaced by simply removing it from the fixing rod 30 without dismantling the entire protective component 7 system; Flexible protection is achieved through a multi-level buffer structure. When a vehicle or object hits the guardrail, it first contacts the elastic protective strip 31, and the impact force is transmitted to the arc plate 36 through the fixed rod 30, causing the buffer block 27 to slide in the buffer groove 26 and compress the spring 28; this design achieves three-level energy dissipation: the first level absorbs the initial kinetic energy through the tensile deformation of the elastic protective strip 31; the second level is driven by the fixed rod 30 to drive the overall displacement of the arc plate 36, dispersing the concentrated impact force to multiple buffer blocks 27; the third level is achieved by each buffer block 27 independently compressing the spring 28 to achieve distributed energy absorption. This structure can absorb most of the impact energy, so that the protective member 7 can maintain the integrity of the overall structure when it is hit, minimize the reaction force on the impact object, and reduce the risk of secondary injury.

[0032] In this embodiment, a sound insulation board 32 is connected between the inner end surfaces of the two support columns 8, and a reflective coating is provided on the outer end surface of the sound insulation board 32. A clamping block 33 is provided at one end of the crossbeam 10, and a matching clamping hole 34 is provided at the other end. Corresponding threaded holes are provided on the clamping hole 34 and the clamping block 33; a winding drum 35 is provided on the outer end surface of the support seat 12; When the protective part 7 is installed, first insert the clamping block 33 into the clamping hole 34 of another protective part 7, and then screw the bolt into the threaded hole to complete the fixation. After splicing and fixing the cross beam 10, fix the support 9; the design of the sound insulation board 32 can effectively reduce the noise during construction, and the design of the reflective coating enables it to be clearly visible even at night or under low light conditions, playing a warning role.

[0033] The drum 35 is provided for winding cables or water pipes, so that when the support seat 12 is moving for operation, it can drag the cables or water pipes, avoiding the messy winding of the cables or water pipes, improving the stability of the support seat 12 during movement, and also facilitating the staff to wind and recycle.

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

Claims

1. A regenerated aggregate anti-blocking permeable concrete pavement, characterized in that, It includes the following layered structures: Plain soil foundation layer; Recycled sand and gravel layer laid on the plain soil foundation layer; Permeable geotextile layer covering the recycled sand and gravel layer; Recycled aggregate permeable concrete layer arranged on the permeable geotextile layer; Strong permeable concrete layer located above the recycled aggregate permeable concrete layer; And a transparent sealing layer covering the surface of the strong permeable concrete layer.

2. The permeable concrete pavement with recycled aggregate anti-clogging according to claim 1, characterized in that: The recycled aggregate permeable concrete layer is prepared from cement, mineral admixture, recycled aggregate, sodium silicate, sodium fluorosilicate and water in a certain weight ratio; after the mixed solution of sodium silicate and sodium fluorosilicate pre-treats the recycled aggregate, the remaining ingredients are added for reaction.

3. A regenerated aggregate anti-clogging permeable concrete pavement according to claim 1, characterized in that: The strong permeable concrete layer is prepared from aggregate, cement, water, strengthening agent and additive in a certain weight ratio; the strengthening agent includes concrete superplasticizer, retarder, polymer powder, water retention agent and high-purity silica; the additive includes powder additive and liquid additive, the powder additive includes polymer powder, and the liquid additive includes water retention agent and dispersant.

4. A construction method for a regenerated aggregate anti-clogging permeable concrete pavement as described in any one of claims 1 to 3, characterized in that, It includes the following steps: S1. Subgrade treatment: Ram or compact the original soil of the roadbed to form a plain soil foundation layer; Lay a blind pipe on the plain soil foundation layer and fill the stones around the blind pipe; S2. Cushion laying: Process construction waste into recycled gravel and spread it flat on the plain soil foundation layer to form a recycled sand and gravel layer; S3. Geotextile laying: Lay the permeable geotextile on the recycled sand and gravel layer; S4. Concrete pouring: Pour the recycled aggregate permeable concrete and the strong permeable concrete in sequence; and perform compaction, polishing and curing work in sequence after the pouring is completed; S5. Re-treatment: After the curing is completed, cut and fill the joints of the road surface; finally, after cleaning and drying the road surface, spray a sealing agent to form a transparent sealing layer; Among them, the paving, compaction, polishing and curing work are all constructed by a construction device. The construction device includes a first protection component and a second protection component. The first protection component and the second protection component are respectively installed on the left and right sides of the subgrade, and a moving device is connected between the first protection component and the second protection component. An engineering device is installed on the moving device in a lifting manner. The engineering device is one of a paver, a compactor, a polisher and a curing machine. The moving device drives the working device to move along the direction of the subgrade; both the first protection component and the second protection component are composed of several protection parts, and several protection parts on the same side are spliced together along the length direction of the roadbed.

5. The construction method according to claim 4, characterized in that: The protective member includes two support columns, a support is fixed to the bottom of each support column, the tops of the two support columns are connected by a cross beam, a guiding channel is provided at the inner end of the cross beam, the moving device includes two support seats and support rods, the two support seats are respectively installed on the protective members on the left and right sides, a roller is rotatably connected to the outer end of each support seat, the roller is located in the guiding channel on the corresponding side and moves therein, a first motor is installed on each support seat, the first motor is used to drive the roller to rotate, a connecting seat is provided at the inner end of each support seat, a plurality of fixing grooves are provided in the connecting seat, a plurality of the support rods are connected between the two support seats on both sides, and the ends of the support rods are detachably installed in the fixing grooves, a moving seat is slidably arranged on each support rod, a power assembly is provided on each support seat, the power assembly is used to drive the moving seat to move horizontally along the support rod, an installation seat is provided at the bottom end of the moving seat, and the installation seat is used to install engineering devices.

6. The construction method according to claim 5, characterized in that: The power assembly includes a second motor, a driving rope and a wire wheel, the second motor is installed on the support seat, a wire wheel is provided on the output shaft of the second motor, a driving rope is provided on the wire wheel, adjusting seats are provided at both the left and right ends of the moving seat, and the other ends of the two driving ropes on both sides are respectively connected to the adjusting seats on the corresponding sides, and the second motor drives the moving seat to move by controlling the winding and unwinding of the driving rope.

7. The construction method according to claim 5, characterized in that: A telescopic cylinder is provided on the support seat, the piston end of the telescopic cylinder penetrates through the bottom of the support seat and extends downward, a bearing seat is fixed to the end of the piston rod of the telescopic cylinder, a driving rod is detachably connected between the two bearing seats on both sides, a plurality of telescopic rods are connected between the installation seat and the moving seat, and a sliding cylinder is provided in the middle of the top end of the installation seat, and the sliding cylinder is slidably sleeved on the surface of the driving rod.

8. The construction method according to claim 5, characterized in that: A plurality of buffer grooves are provided on the outer end face of the support column, a buffer block is slidably arranged in each buffer groove, and a spring is connected between the buffer block and the buffer groove, the other end of each buffer block is connected to an arc-shaped plate, a plurality of limiting grooves are provided on the other end face of the arc-shaped plate, and a fixing rod is connected to the bottom end of the limiting groove; an elastic protective belt is connected between two adjacent fixing rods on the same horizontal plane, and the elastic protective belt is detachably sleeved on the fixing rod.

9. The construction method according to claim 5, characterized in that: A sound insulation board is connected between the inner end faces of the two support columns, and a reflective coating is provided on the outer end face of the sound insulation board.

10. The construction method according to claim 5, characterized in that: A clamping block is provided at one end of the cross beam, a clamping hole adapted thereto is provided at the other end, and corresponding threaded holes are provided in the clamping hole and the clamping block; a winding drum is provided on the outer end face of the support seat.

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