Pavement rapid hardening, paving and leveling construction machine and construction method

Abstract

The invention discloses pavement rapid hardening, paving and leveling construction machinery and a construction method.The pavement rapid hardening, paving and leveling construction machinery comprises a crawler chassis, a power device and a cab and further comprises a ploughing and grouting device, a stirring device and a paving and leveling device, a cross beam is installed on the crawler chassis, and the ploughing and grouting device and the stirring device are installed at the front end of the cross beam; the paving and leveling device is installed at the rear end of the cross beam, through movement of the crawler chassis, the ploughing and grouting device firstly plows a road surface out of a gully and injects alkali-activated slurry into the gully, the stirring device fully mixes soil and the alkali-activated slurry, and then the paving and leveling device strickles and tamps the road surface which fully reacts. According to the machine, the principle of alkali-activated geopolymer solidified soil is utilized, rapid hardening of the pavement is achieved, the hardening efficiency and the construction quality of the pavement are improved, and the construction safety is improved.

Description

Technical Field

[0001] The invention relates to a road surface rapid hardening, paving and leveling construction machine and a construction method. Background Art

[0002] Pavement hardening refers to the processing of the pavement through a specific construction process to improve its durability and bearing capacity. In the existing construction process, most of the existing road pavement is covered with asphalt, concrete and other building materials as a hardened layer, or assembled prefabricated panels are used to splice and pave the road to achieve the purpose of hardening the pavement. Among them, the hardening of silt soft soil pavement is particularly special. Usually, the mixing head on the mixer truck mechanical arm is inserted into the soft soil for mixing, and the grouting on the mixing head is poured into the soft soil to inject curing agent, and the mixture is fully stirred to form a hardened pavement.

[0003] The patent application number is CN20230083460.X. A road surface hardening pouring device includes a support plate, a storage box is fixedly installed on the top of the support plate, the storage box is filled with road surface pouring materials, and a mixing mechanism is arranged on the side wall of the storage box to prevent the road surface pouring materials from solidifying. The mixing mechanism includes a transmission shaft rotatably installed in the storage box, and a plurality of stirring blades are evenly fixedly connected to the outer wall of the transmission shaft. The pouring device does not provide a power device and needs to be manually pushed for operation, and cannot efficiently achieve the pouring and hardening of the road surface.

[0004] Although the hardened pavement paving device and its paving method with patent application number "202410474542.6" have higher efficiency and turnover utilization rate than the traditional assembled prefabricated panel splicing and paving of hardened pavement, the risk factor is high in the process of using support rollers to raise and lower the unit panels, which increases the occurrence rate of safety accidents at the construction site. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a road surface rapid hardening paving and leveling construction machinery and a construction method. The machinery utilizes the principle of alkali-activated geopolymer solidification soil to achieve rapid hardening of the road surface, improve the hardening efficiency and construction quality of the road surface, and improve the safety of construction.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a road surface rapid hardening paving and leveling construction machinery, including a crawler chassis, a power unit, a cab, and also a plowing and grouting device, a stirring device and a paving and leveling device. A crossbeam is installed on the crawler chassis, the plowing and grouting device and the stirring device are installed at the front end of the crossbeam, and the paving and leveling device is installed at the rear end of the crossbeam. Through the movement of the crawler chassis, the plowing and grouting device first plows grooves on the road surface and injects alkali-activated slurry into the grooves, the stirring device fully mixes the soil and the alkali-activated slurry, and then the fully reacted road surface is scraped and compacted through the paving and leveling device.

[0007] Furthermore, the plowing and grouting device includes a trenching part and a grouting part. The trenching part includes a plowing mechanical arm hinged at the front end of the beam and the plowing mechanical arm is equipped with a first hydraulic device to control the lifting or lowering of the plowing mechanical arm. A plurality of plow blades are arranged at the front end of the plowing mechanical arm.

[0008] Furthermore, the grouting part includes a plurality of plowshares provided with grouting nozzles and slurry outlets, the slurry outlets are connected to the grouting nozzles, and the plurality of grouting nozzles are commonly connected to the grouting pump output port through a feed pipe with a diverter valve, the grouting pump input port is connected to a storage tank through a feed pipe, the storage tank and the grouting pump are both arranged on a crawler base, a feed hopper and a liquid level sensor are provided at the upper end of the storage tank, and a discharge port is provided at the rear end of the storage tank near the bottom.

[0009] Furthermore, one end of the storage tank close to the discharge port is hinged to the crawler chassis, and the end away from the discharge port is provided with a lifting support column, and the lifting support column is used to lift one side of the storage tank to form different inclination angles.

[0010] Furthermore, the stirring device is arranged on the plowing mechanical arm, and the stirring device includes a rotating roller, and the rotating roller is provided with a plurality of stirring plates distributed circumferentially with the rotating roller as the center, and the plurality of stirring plates are provided in multiple groups in the length direction of the rotating roller, one end of the rotating roller is rotatably connected to the plowing mechanical arm, and the other end is connected to a driving member, and the driving member is fixed in a slot of the plowing mechanical arm, and a driving shaft of the driving member passes through the plowing mechanical arm and is connected to the rotating roller.

[0011] Furthermore, a fender is provided above the stirring device, and a telescopic hydraulic rod is provided on the fender. The telescopic hydraulic rod is fixedly connected to a hinge seat on the outer end surface of the power device, and the hinge seat limits the minimum inclination angle of the fender.

[0012] Furthermore, the paving and leveling device includes a paving robot arm hinged at the rear end of the crossbeam, and the paving robot arm is also equipped with a second hydraulic device to control the raising or lowering of the paving robot arm. The paving robot arm is connected to a paving plate, and a scraper plate is in the form of an arc right angle at one end of the paving plate close to the crawler chassis. A vibrating part is provided on the paving plate to form vibration compaction.

[0013] Furthermore, the crawler chassis includes a crawler track arranged on a power wheel, a supporting wheel is provided inside the crawler track, and the power device is used to drive the movement of the crawler chassis.

[0014] Furthermore, the power device is provided with an exhaust pipe and a heat dissipation grille.

[0015] The present invention also provides a construction method, which is characterized by comprising the following steps:

[0016] S1: Prepare a corresponding amount of alkali activated slurry according to the road paving section and transport it to the storage tank. The alkali activated slurry is made by mixing an alkali activator and a cementitious material. The cementitious material is a composite of one or more of slag fly ash, metakaolin, slag micro powder, etc.;

[0017] S2: According to the designed compressive strength value of the road surface, the thickness of the solidified soil is determined, the angle of the plowing mechanical arm is adjusted, and then the construction device is started to move along the construction section;

[0018] S3: The grouting part is started synchronously with the ditching part. During the process of forming gullies in the ditching part, the grouting part injects the alkali-activated slurry in the storage tank at a speed of 10-15L / min through the grouting pump, and then fully stirs the soil injected with the alkali-activated slurry through the stirring device.

[0019] S4: Repeat step S3 to ensure that the soil and the alkali-activated slurry are fully mixed, and manually check the full mixing;

[0020] S4: After passing the inspection, the fully mixed soil will harden under the action of the alkaline activated slurry and then be flattened by a spreading and leveling device.

[0021] Beneficial effects:

[0022] 1. Since traditional road hardening is to cover the existing road surface with asphalt, concrete and other building materials as a hardening layer or lay prefabricated slabs, the construction and maintenance cycle is long and the demand for concrete materials is large. This application uses the principle of alkali-activated geopolymer solidification soil, and cooperates with paving and leveling construction machinery to achieve rapid hardening of the road surface, thereby improving the hardening efficiency and construction quality of the road surface.

[0023] 2. The paving and leveling construction machinery includes a plowing and grouting device, a mixing device and a paving and leveling device. The plowing and grouting device is used to ensure that the corresponding grooves are plowed out on the ground to preliminarily determine the thickness of the hardened road surface and inject a corresponding amount of alkali-activated slurry. The hardened road surface thickness can be adjusted by adjusting the height or downward position of the plowing mechanical arm. The alkali-activated slurry is then fully reacted with the soil and solidified through the mixing device. Subsequently, the ground is flattened and compacted through the paving and leveling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of construction machinery;

[0025] Figure 2 This is a top view of the plowing mechanical arm;

[0026] Figure 3 A schematic diagram of a plowshare;

[0027] Figure 4 is a schematic diagram of a stirring device;

[0028] Figure 5 It is a partial cross-sectional schematic diagram of the connection between the fender and the power unit;

[0029] Figure 6 It is a schematic diagram of the vibration part.

[0030] Figure numerals: 1. crawler chassis; 2. power unit; 3. cab; 4. plowing and grouting device; 41. trenching part; 411. plowing mechanical arm; 412. first hydraulic device; 413. plow cutter; 42. grouting part; 421. grouting nozzle; 422. slurry outlet; 423. diverter valve; 424. feed pipe; 425. grouting pump; 426. storage tank; 5. stirring device; 51. rotating roller; 52. stirring plate; 53. driving member; 6. paving and leveling device; 61. paving mechanical arm; 62. second hydraulic device; 63. paving plate; 64. scraper plate; 65. vibration part; 7. crossbeam; 8. feed hopper; 9. liquid level sensor; 10. discharge port; 11. lifting support column; 12. slotting; 13. mudguard; 14. telescopic hydraulic rod; 15. exhaust pipe; 16. radiator grille. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0032] Refer to Figure 1-Figure 6 As shown, this experimental model provides a road surface rapid hardening paving and leveling construction machinery, including a crawler chassis 1, a power unit 2, and a cab 3. The cab 3 is provided with an operating table and a driver's seat. The operating table is used to operate the power unit 2, the plowing and grouting device 4, the stirring device 5 and the paving and leveling device 6. The power unit 2 is provided with an exhaust pipe 15 and a heat dissipation grille 16 to improve the heat dissipation performance. The crawler chassis 1 includes a power wheel, a crawler track arranged on the power wheel, a support wheel is arranged on the inner side of the crawler track, and a crossbeam 7 is arranged between the power wheels (since the crawler chassis 1 belongs to the prior art, it will not be described in detail here), a plowing and grouting device 4 and a stirring device 5 are installed at the front end of the crossbeam 7, and a paving and leveling device 6 is installed at the rear end of the crossbeam 7. The movement of the crawler chassis 1 is realized, and the plowing and grouting device 4, the stirring device 5 and the paving and leveling device 6 are moved. The plowing and grouting device 4 first plows a groove on the road surface and injects alkali-activated slurry into the groove. The present application mainly utilizes the principle of alkali-activated geopolymer solidification soil to achieve rapid hardening of the road surface, which solves the problem that the prior art uses covering asphalt, concrete and other building materials as the hardening layer, resulting in a long construction and maintenance cycle and a large cement requirement, which is not conducive to reducing carbon emissions and energy consumption.

[0033] Specific references such as Figure 2As shown, the plowing and grouting device 4 includes a trenching part 41 and a grouting part 42. The trenching part 41 includes a plowing mechanical arm 411 hinged at the front end of the crossbeam 7, and the plowing mechanical arm 411 is equipped with a first hydraulic device 412 to control the lifting or lowering of the plowing mechanical arm 411, so as to control the thickness of the required soil solidification. A plurality of plow blades 413 are arranged at the front end of the plowing mechanical arm 411. The plurality of plow blades 413 can be distributed at the front end of the plowing mechanical arm 411 obliquely with the width center of the plowing mechanical arm 411 as the symmetry axis, or can be distributed in other arrangements, as long as a long and continuous gully can be formed. The grouting part 42 includes a plurality of grouting nozzles 421 and a slurry outlet 422 provided on the plowshares 413. The slurry outlet 422 is connected to the grouting nozzle 421. The plurality of grouting nozzles 421 are commonly connected to the output port of a grouting pump 425 through a delivery pipe 424 with a diverter valve 423. The input port of the grouting pump 425 is connected to a storage tank 426 through the delivery pipe 424. The storage tank 426 and the grouting pump 425 are both arranged on a track base. When the track base moves, the plowshares 413 move to open a trench to form a gully, and the grouting pump 425 is started at the same time. The alkali-activated slurry is transported from the storage tank 426 to the grouting nozzle 421 and then injected into the gully from the slurry outlet 422. Subsequently, the soil and the gully are fully stirred by the stirring device 5.

[0034] Before the road construction, the required alkali-activated slurry is added in a corresponding amount through the feed hopper 8 on the storage tank 426, and the information on the amount of liquid in the storage tank 426 can be obtained through the liquid level sensor 9 to avoid insufficient or excessive output waste of alkali-activated slurry. After the construction is completed, the storage tank 426 needs to be cleaned in time. A discharge port 10 is provided near the bottom of the rear end of the storage tank 426. In order to prevent unclean discharge, the end of the storage tank 426 close to the discharge port 10 is hinged to the crawler chassis 1, and the end away from the discharge port 10 is provided with a lifting support column 11. The lifting support column 11 is used to lift the storage tank 426 on one side to form different inclination angles, so that the residual liquid in the storage tank 426 is discharged cleanly.

[0035] Refer to Figure 2 , Figure 4 , Figure 5As shown, the stirring device 5 is arranged on the plowing mechanical arm, and the stirring device 5 includes a rotating roller 51, and the rotating roller 51 is provided with a plurality of stirring plates 52 distributed around the rotating roller 51, and the plurality of stirring plates 52 are arranged in a plurality of groups in the length direction of the rotating roller 51. One end of the rotating roller 51 is rotatably connected to the plowing mechanical arm 411, and the other end is connected to a driving member 53, and the driving member 53 is a motor. The motor is fixed in the slot 12 of the plowing mechanical arm 411, and the driving shaft of the motor passes through the plowing mechanical arm 411 and is connected to the rotating roller 51. In order to prevent soil from splashing when the stirring plate 52 is rotating, a mudguard 13 is provided above the stirring device 5. A telescopic hydraulic rod 14 is provided on the mudguard 13. The telescopic hydraulic rod 14 is fixedly connected to a hinge seat on the outer end surface of the power device 2. The hinge seat limits the minimum inclination angle and the lowering degree of the mudguard 13. The telescopic hydraulic rod 14 can also be adjusted to a threaded adjustment or other adjustment structure to achieve the ability of the mudguard 13 to adjust its position, thereby avoiding damage between components caused by collision with the mudguard 13 during the lifting of the plowing mechanical arm 411.

[0036] Refer to Figure 1 , Figure 6 As shown, after the mixing is completed, the paving and leveling device 6 arranged at the rear end of the cross beam 7 compacts and levels the solidified soil. The paving and leveling device 6 includes a paving mechanical arm 61 hinged at the rear end of the cross beam 7. The paving mechanical arm 61 is also equipped with a second hydraulic device 62 to control the raising or lowering of the paving mechanical arm 61. The paving mechanical arm 61 is connected to a paving plate 63. The paving plate 63 is preferably a thick plate made of metal. A scraper plate 64 with a circular arc right angle is provided on the side close to the crawler chassis 1. In order to compact it more firmly, a vibration part 65 is provided on the paving plate 63, and the paving mechanical arm 61 is movably connected to the thick plate through a spring. A vibration motor is fixedly installed on the thick plate. The vibration of the thick plate is realized by starting the vibration motor to level and compact the road surface. Other vibration structures can also be used, not limited to the above structures, such as hydraulic vibration or ultrasonic vibration. As long as the vibration compaction effect can be produced, it can be applied to this application.

[0037] Working method: the alkali-activated slurry is stored in the storage tank 426 through the feed hopper 8, and then when the crawler base is started to move, the first hydraulic device 412 is synchronously started through the operating console in the cab 3 to lower the position of the plowing mechanical arm 411, and the grouting pump 425 is started after the plow blade 413 at the front end of the plowing mechanical arm 411 opens a ditch to form a gully, and the alkali-activated slurry is injected into the gully, and the stirring device 5 is synchronously started to fully stir the soil and the alkali-activated slurry. During the movement of the crawler chassis 1, the paving and leveling device 6 arranged at the rear end of the beam 7 is also started to level and compact the soil, so that the road surface hardens quickly.

[0038] The present application also provides a construction method.

[0039] S1: Prepare a corresponding amount of alkali activated slurry according to the road paving section and transport it to the storage tank. The alkali activated slurry is made by mixing an alkali activator and a cementitious material. The cementitious material is a composite of one or more of slag fly ash, metakaolin, slag micro powder, etc.;

[0040] S2: According to the designed compressive strength value of the road surface, the thickness of the solidified soil is determined, the angle of the plowing mechanical arm is adjusted, and then the construction device is started to move along the construction section;

[0041] S3: The grouting part is started synchronously with the ditching part. During the process of forming gullies in the ditching part, the grouting part injects the alkali-activated slurry in the storage tank at a speed of 10-15L / min through the grouting pump, and then fully stirs the soil injected with the alkali-activated slurry through the stirring device.

[0042] S4: Repeat step S3 to ensure that the soil and the alkali-activated slurry are fully mixed, and manually check the full mixing;

[0043] S4: After passing the inspection, the fully mixed soil will be hardened under the action of the alkaline activated slurry and then flattened by a paving and leveling device to ensure a smooth road surface.

[0044] Specifically, the mixing station is equipped with alkali activators in advance. The alkali activators include solutions such as calcium chloride, sodium hydroxide, water glass, and sodium sulfate. After being configured, they are placed in a closed storage tank for a certain period of time to allow the alkali activator to reach chemical equilibrium. A large amount of heat will be released during the preparation and configuration of the alkali activator. Too high a temperature will be detrimental to the hydration reaction. Therefore, a condensation system is set around the alkali activator storage tank to facilitate the rapid cooling of the alkali activator. The alkali activator and the cementitious material are pumped into the mixer. The surface of the mixer is sprayed with an alkali-resistant coating material. The stirring time is not less than 3 minutes to obtain an alkali-activated slurry. The cementitious material can be a composite of one or more of slag fly ash, metakaolin, slag micropowder, etc. Fly ash, slag and brick slag micropowder all have certain volcanic ash activity and have hardening properties under the action of alkaline activators. Since this characteristic will be applied to road hardening, the alkali-activated slurry is transported to the storage tank, and then the construction device is started. According to the designed compressive strength value of the road surface, the thickness of the solidified soil is determined, so as to adjust the angle of the plowing mechanical arm. After the adjustment, the trenching part is started to form a gully and the grouting part is also started synchronously. The grouting part injects the alkali-activated slurry into the gully through the grouting pump. The stirring device then stirs the soil so that the soil is fully in contact with the alkali-activated slurry to harden the soil evenly. After stirring evenly, the soil is flattened by the paving and leveling device to ensure that the road surface is flat.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A road surface fast hardening paving and leveling construction machine, comprising a crawler chassis, a power device, and a cab, characterized in that: It also includes a plowing and grouting device, a stirring device and a paving and leveling device. A crossbeam is installed on the crawler chassis. The plowing and grouting device and the stirring device are installed at the front end of the crossbeam, and the paving and leveling device is installed at the rear end of the crossbeam. Through the movement of the crawler chassis, the plowing and grouting device first plows grooves on the road surface and injects alkali-activated slurry into the grooves, the stirring device fully mixes the soil and the alkali-activated slurry, and then the fully reacted road surface is scraped and compacted through the paving and leveling device.

2. The road surface rapid hardening paving and leveling construction machinery according to claim 1 is characterized by: The plowing and grouting device includes a trenching part and a grouting part. The trenching part includes a plowing mechanical arm hinged at the front end of the beam, and the plowing mechanical arm is equipped with a first hydraulic device to control the lifting or lowering of the plowing mechanical arm. A plurality of plow cutters are arranged at the front end of the plowing mechanical arm.

3. The road surface rapid hardening paving and leveling construction machinery according to claim 2 is characterized by: The grouting part includes a plurality of plowshares provided with grouting nozzles and slurry outlets, the slurry outlets are connected to the grouting nozzles, and the plurality of grouting nozzles are commonly connected to the grouting pump output port through a feed pipe with a diverter valve, the grouting pump input port is connected to a storage tank through a feed pipe, the storage tank and the grouting pump are both arranged on a crawler base, a feed hopper and a liquid level sensor are provided at the upper end of the storage tank, and a discharge port is provided at the rear end of the storage tank near the bottom.

4. The road surface rapid hardening paving and leveling construction machinery according to claim 3 is characterized by: One end of the storage tank close to the discharge port is hinged to the crawler chassis, and the end away from the discharge port is provided with a lifting support column, and the lifting support column is used to lift one side of the storage tank to form different inclination angles.

5. The road surface rapid hardening paving and leveling construction machinery according to claim 4 is characterized by: The stirring device is arranged on the plowing mechanical arm, and the stirring device includes a rotating roller. The rotating roller is provided with a plurality of stirring plates distributed circumferentially with the rotating roller as the center, and the plurality of stirring plates are arranged in multiple groups in the length direction of the rotating roller. One end of the rotating roller is rotatably connected to the plowing mechanical arm, and the other end is connected to a driving member. The driving member is fixed in a slot of the plowing mechanical arm, and a driving shaft of the driving member passes through the plowing mechanical arm and is connected to the rotating roller.

6. The road surface rapid hardening paving and leveling construction machinery according to claim 5 is characterized by: A fender is also provided above the stirring device. A telescopic hydraulic rod is provided on the fender. The telescopic hydraulic rod is fixedly connected to an articulated seat on the outer end surface of the power device. The articulated seat limits the minimum inclination angle of the fender.

7. The road surface rapid hardening paving and leveling construction machinery according to claim 6 is characterized by: The paving and leveling device includes a paving robot arm hinged at the rear end of the crossbeam, and the paving robot arm is also equipped with a second hydraulic device to control the raising or lowering of the paving robot arm. The paving robot arm is connected to a paving plate, and the paving plate has a scraping plate in the form of a circular arc at a right angle at one end close to the crawler chassis. A vibrating part is provided on the paving plate to form vibration compaction.

8. The road surface rapid hardening, paving and leveling construction device according to claim 7 is characterized by: The crawler chassis comprises a crawler track arranged on a power wheel, a supporting wheel is arranged inside the crawler track, and the power device is used for driving the movement of the crawler chassis.

9. The road surface rapid hardening, paving and leveling construction device according to claim 8, characterized in that: The power device is provided with an exhaust pipe and a radiating grille.

10. A construction method using the road surface rapid hardening, paving and leveling construction device according to any one of claims 1 to 9, characterized in that: S1: Prepare a corresponding amount of alkali activated slurry according to the road paving section and transport it to the storage tank. The alkali activated slurry is made by mixing an alkali activator and a cementitious material. The cementitious material is a composite of one or more of slag fly ash, metakaolin, slag micro powder, etc.; S2: According to the designed compressive strength value of the road surface, the thickness of the solidified soil is determined, the angle of the plowing mechanical arm is adjusted, and then the construction device is started to move along the construction section; S3: The grouting part is started synchronously with the start of the trenching part. In the process of forming the trench in the trenching part, the grouting part injects the alkali-activated slurry in the storage tank at a speed of 10-15L / min through the grouting pump, and then fully stirs the soil injected with the alkali-activated slurry through the stirring device; S4: Repeat step S3 to ensure that the soil and the alkali-activated slurry are fully mixed, and manually check the full mixing; S4: After passing the inspection, the fully mixed soil will harden under the action of the alkaline activated slurry and then be flattened by a spreading and leveling device.

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