Hot in-place recycling ultrathin overlaying machine of bituminous pavement and construction method thereof

Abstract

The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement. By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged.

Description

technical field [0001] The invention belongs to the technical field of large-scale continuous overlay surface equipment for hot-in-place regeneration of asphalt pavement, and in particular relates to an ultra-thin overlay machine for hot-in-place regeneration of asphalt pavement and a construction method thereof. Background technique [0002] The concept of Pavement Preventive Maintenance was proposed by the United States in the early 1990s. It is a periodic mandatory maintenance measure, and it is a maintenance measure taken to restore the service function of the pavement surface when the pavement structure strength is sufficient and only the surface function is attenuated. The basic idea is: (1) to keep the road system in good condition for a longer period of time, delaying future damage, and improving the functional condition of the system without increasing the structural bearing capacity; Apply on suitable road surface. The core of preventive maintenance is to require...

AI Technical Summary

Problems solved by technology

[0009] 1) The method of manual paving: it is often used in small-area operation sections, and its disadvantages are: the possibility of defects in the asphalt mixture layer paved manually, uneven material layers, too many joints, and inconsistent compaction etc. directly affect the performance of the pavement and reduce the service life

The disadvantages of this construction method are as follows: ①It is limited to one heating and stirring of the new asphalt mixture to be added to the road surface;

The spraying device only cleans the dust on the original road surface and sprays asphalt. There is no treatment for the original damaged road surface. The temperature difference between the new material and the road surface is large, and it is difficult to ensure the bonding performance between the new and old materials. The obvious joint is inevitable. up

②The volume of the stone heating drum and the asphalt heating tank is always limited, and it is difficult to adapt to a large area of ​​repaired pavement with one addition. ③The construction process requires at least two drivers and operators

[0012] Chinese patent 200810050663.9 discloses a self-unloading asphalt pavement repair vehicle, which includes components such as a car body, an automatic unloading compartment, a screed compacting plate, an infrared oven, and a console, and has two speeds of driving and working, and can be operated independently. Unloading, ironing, compacting and infrared baking functions, this construction method adds the baking of the defective road surface and the ironing and compacting process of the paving material, so that the defective road surface after heat treatment is softened, and the new road surface is improved. The bonding performance of asphalt mixture and defective pavement, but there are still the following problems: ① For large-area repaired pavement, only the surface of the defective pavement is baked and heat-treated. The increase in temperature is conducive to the combination of new materials, but it is still difficult to eliminate the old and new Material delamination phenomenon, there are weak joints between new and old material layers

② For small-area pavement repairs, heat treatment is not required, but new materials are added and then ironed and compacted. The problem of combining old and new materials is still not solved. If the depression on the defective road surface is shallow, it will be more difficult to combine new and old materials

③The automatic unloading compartment can only unload automatically, without an automatic follow-up feeding system, continuous construction operations cannot be carried out

[0013] Chinese patent 200620090543.8 discloses a hot-in-place regenerative milling machine for asphalt pavement, which includes a chassis, an engine and a transfer case, a heating system, a milling drum, a hydraulic system, an electrical instrument system, etc. Milling after softening→accumulation of old materials after milling→spraying regenerant on old materials→stirring and mixing of old materials and regenerant→reaccumulation and other functions. The treatment of layers is relatively thorough, the collection and regeneration of old materials is relatively scientific, and the operation is highly automated, but it only completes part of the road construction, and the subsequent processing of old materials, mixing, paving, ironing, compaction, etc. It has to be completed by its corresponding equipment

[0014] Chinese patent 200620090542.3 discloses an in-situ hot regeneration remixer for asphalt pavement, which includes an engine and a transfer case, a chassis, a receiving hopper, a collecting screw and an inclined conveyor, a stirring pot, a hydraulic system, an electrical instrument system, etc., and has new Material spreading→new and old materials mixing and paving→heating→aggregate inclined conveying→stirring pot mixing and stirring and other functions. This construction method solves the problems of mixing, stirring and regeneration of new and old materials. The heating system adopts a hot air circulation heating system with relatively high thermal efficiency, but The asphalt mixture after mixing still has to pass through the paver to pave the road surface, that is to say, the equipment is increased, and the temperature loss of the material is serious.

[0016] 1) There are many equipments during construction, lengthy units, large closed traffic distance, and long construction period, which affect the utilization rate of roads

[0017] 2) In order to achieve the function of asphalt pavement, the thickness of the paving material should not be less than 50mm, wasting raw materials

[0018] 3) The mobile asphalt pavement maintenance tractor with patent No. 20050099967.6 and the self-unloading asphalt pavement repair vehicle with patent No. 200810050663.9 can complete the pavement repair work at one time. No guarantee, short service life, shortened maintenance intervals

[0019] 4) The hot-in-place regeneration milling machine for asphalt pavement with patent No. 200620090543.8 and the hot-in-place regeneration and remixer for asphalt pavement with patent No. 200620090542.3 solve the problems of regeneration of old materials, mixing of old and new materials, and heating of road surfaces, but each piece of equipment is only Completing a part of the road repair cannot complete the one-time and continuous repair work on the damaged road surface, which increases the repair cost

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