JP3174738B2 - Asphalt road surface cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to asphalt road surface cutting for removing degraded asphalt on a pavement road by using microwave irradiation means for heating the inside of asphalt with microwaves and cutting and removing means for cutting and removing heated asphalt. It concerns the device.

[0002]

2. Description of the Related Art A conventional example of the asphalt road surface cutting apparatus will be described with reference to FIG.
Reference numeral 6 denotes a heated cutting vehicle, and reference numeral 17 denotes an enclosure in which the microwave antenna unit 12 and the blade 15 are installed. Reference numeral 24 denotes a dump truck that loads and transports the removed asphalt.

[0003] At the time of construction, a microwave antenna unit 12 for heating the inside of asphalt by microwaves irradiated on the asphalt pavement 1 and a blade 15 for cutting and removing the heated asphalt are used together to remove the degraded asphalt of the pavement 1. I try to peel off.

[0004]

The conventional asphalt road surface cutting apparatus shown in FIG. 4 has the following problems. That is, (1) The microwave irradiated from the microwave antenna unit 12 to the asphalt pavement road 1 is hardly absorbed into the asphalt, the heating time becomes long, and the construction speed is low. (2) This tendency is particularly strong for asphalt that has not progressed much in deterioration, and uneven heating may occur depending on the state of deterioration. (3) Poor absorption means that permeability is excellent, and the repair target (generally 40 to 50 m
m) to the asphalt portion deeper than
The cooling period is required, and the traffic blocking period is lengthened. (4) The fact that the transmittance is excellent means that the microwave is largely wrapped around the periphery, and there is a problem that the leakage of the microwave increases.

The present invention has been proposed in view of the above-mentioned problems, and its object is to improve microwave heating characteristics, to stir up scraped asphalt, and to discharge backward asphalt with low load. It can be carried out in an efficient manner and can be reused without damaging aggregates and the like in the removed asphalt, can effectively use the exhaust heat of the generator, and can easily excavate or scrape the asphalt surface by the first excavation means. An object of the present invention is to provide an asphalt road surface cutting device that can be used.

[0006]

Means for Solving the Problems To achieve the above object, the present invention provides a combination of microwave irradiation means for heating the inside of asphalt with microwaves and cutting and removing means for cutting and removing heated asphalt. In an asphalt road surface cutting device for stripping deteriorated asphalt of a pavement road, a watering means for spraying water mixed with a surfactant, and excavating or scraping only the surface of the asphalt before watering the water mixed with a surfactant. 1 excavation means,
A second excavating means for excavating or scraping asphalt after microwave irradiation and before cutting and removing by the cutting and removing means is provided (claim 1).

In the asphalt road surface cutting apparatus according to the first aspect, the asphalt surface is preheated by using exhaust gas discharged from a generator before excavating or scraping the asphalt by the first excavating means. Good (claim 2).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an asphalt road surface cutting apparatus according to the present invention will be described with reference to an embodiment shown in FIGS. 1 is a side view showing the entire asphalt road surface cutting device, FIG. 2 is a plan view thereof, and FIG. 3 is an operation explanatory diagram at the time of construction. 1
Is an asphalt pavement road, 2 is a generator vehicle, 3 is a generator, 4 is a heat exchanger, 5 is a steam blower, and the generator vehicle 2 is equipped with a generator 3, a heat exchanger 4, and a steam blower 5. I have. The heat exchanger 4 heats water in the heat exchanger 4 by exhaust gas discharged from the power generator 3 to generate steam, and ejects the steam from the steam blower 5 to the asphalt pavement road 1 within a range of the working width. It has become.

Reference numeral 6 denotes a heated cutting vehicle, and 7 denotes a surface cutting tine (first excavating means) having the same width as the construction width. The surface cutting tine 7 is installed at the front of the heated cutting vehicle 6 so as to be vertically movable. I have. The surface cutting tine 7 can rotate. 8
Is a watering nozzle (watering means) having the same width as the construction width, and the watering nozzle 8 is connected to the heated cutting vehicle 6 behind the surface cutting tine 7.
Mounted on A water supply tank 9 is provided above the watering nozzle 8, and the water supply tank 9 and the watering nozzle 8 are connected by piping.

Reference numeral 23 denotes a gantry mounted on the heating cutting vehicle 6 behind the watering nozzle 8 so as to be vertically movable, 10 denotes a plurality of microwave generators installed on the gantry 23, 11 denotes a plurality of waveguides, Are a plurality of microwave antenna units disposed below each microwave generator 10, and these microwave generators 10 are connected to the microwave antenna unit 12 via the waveguide 11. The microwave antenna section 12 is covered with an enclosure 17 for preventing noise during cutting, preventing heat diffusion, and preventing microwave leakage.

Reference numeral 14 denotes a cutting tine having the same width as the construction width (second cutting tine).
This cutting tine 14 is installed on the heated cutting vehicle 6 behind the microwave antenna unit 12 so as to be vertically movable. This cutting tine 14 can rotate.
15 is a blade (cutting and removing means) 15 having the same width as the working width
The blade 15 is installed on the cutting tine 14, and a belt conveyor 16 (see FIGS. 1 and 2) is attached to one side of the blade 15. Blade 15
Is inclined with respect to the traveling direction.

Reference numeral 18 denotes a cooling fan provided on the heating cutting vehicle 6 in front of the microwave generator 10, and reference numeral 19 denotes an exhaust fan provided on the heating cutting vehicle 6 behind the microwave generator 10. Next, the operation of the asphalt road surface cutting device will be specifically described with reference to FIG. At the time of construction, while the generator vehicle 2 and the heating cutting vehicle 6 are running at the same low speed, the exhaust gas discharged from the generator 3 is sent to the heat exchanger 4, where the water in the heat exchanger 4 is exhausted by the exhaust gas. The steam is generated by heating, and the steam is blown out from the steam blower 5 to the asphalt pavement road 1 within a range of the working width to preheat the asphalt pavement road 1.

At this time, the surface cutting tine 7 is rotating at a position slightly (5 to 10 mm) below the surface of the asphalt pavement road 1 and is preheated as the generator vehicle 2 and the heating cutting vehicle 6 advance. The surface of the asphalt pavement road 1 is cut and scraped to form a surface scraping layer 20. The water supply tank 9 stores water mixed with a surfactant, and from the water supply tank 9 as the generator vehicle 2 and the heating cutting vehicle 6 travel, a watering nozzle 8 below the water supply tank 9.
Then, water is sprinkled onto the surface scraping layer 20 to form a water-retaining layer 21.

Since the water in the water supply tank 9 contains a surfactant, the water permeates the cracked asphalt and penetrates into the asphalt. Therefore, if the asphalt survey conducted in advance shows that the asphalt has many cracks and voids, the formation of the surface scraping layer 20 may be omitted. In addition, at the time of the above construction, the microwave 13 from the microwave generator 10 is irradiated to the water-containing layer 21 via the waveguide 11 and the microwave antenna unit 12,
The water-containing layer 21 is heated and softened.

Since the microwaves 13 are absorbed by the water in the water-containing layer 21, the microwave energy permeating deep into the asphalt is reduced, and the asphalt-paved road 1 is reduced.
Effectively heats and softens. A cooling fan 18 in front of the microwave generator 10 and an exhaust fan 19 in the rear of the microwave generator 10 are installed for air cooling the microwave generator 10 and are operated during construction.

The cutting tine 14 behind the microwave antenna 12 rotates at a position lower than the surface of the asphalt pavement 1 by a target depth (normally 40 to 50 mm). The asphalt pavement road 1 that has been heated and softened as the cutting vehicle 2 and the heating cutting vehicle 6 progresses is scraped by a target depth to form a scraping part 22.

The scraping portion 22 is scraped up and scraped by the blade 15 to form the belt conveyor 16.
Is discharged backward. By performing the above series of operations continuously with the progress of the generator vehicle 2 and the heating cutting vehicle 6,
Cutting and removing asphalt deteriorated in construction width. The frequency of the microwave generated in the microwave generator 10 is excellent in water heating characteristics, and is not regulated by the Radio Law or the like.
It is desirable to select H _z.

Further, since most of the surfactant is scattered by heating, there is no adverse effect on the removed asphalt. As for the type of the surfactant, it is desirable to use a neutral surfactant which has no problem in safety and has little influence on others. It has been confirmed that it is effective to set the mixing amount to about 1%.

[0019]

As described above, the asphalt road surface cutting apparatus of the present invention excavates or scrapes the surface of the asphalt by the first excavating means 7 to form a surface scraping layer 20, and then sprays the surface by the watering means 8. Water mixed with an activator is sprayed on the surface scraping layer 20 to form a water-containing layer 21, and then the microwave 13 from the microwave irradiating means 10 is irradiated on the water-containing layer 21 to form an asphalt pavement 1
When heating and softening, the microwave 13 is applied to the water-containing layer 2.
1 to reduce the microwave energy permeated into the asphalt deep by absorbing the water inside, so that the microwave heating characteristics can be improved.

As described above, the microwave irradiation means 10
After irradiating the asphalt pavement with the microwaves from the asphalt pavement,
Is scraped off to the target depth to form a scraping portion 22, which is then scraped up by the cutting and removing means 15 and discharged backward, so that the scraped asphalt is scraped up.
Discharge to the rear can be performed stably with low load.

Further, since the deteriorated asphalt is removed only by heating and scraping as described above, the aggregate and the like in the removed asphalt can be reused without being damaged. In addition, since the asphalt surface is preheated by using the exhaust gas discharged from the generator 3 before the asphalt is excavated or scraped by the first excavating means 7, the exhaust heat of the generator 3 can be effectively used.

After the asphalt surface is preheated, the first excavating means 7 excavates or scrapes the surface of the asphalt, so that the first excavating means 7 can easily excavate or scrape the asphalt surface.

[Brief description of the drawings]

FIG. 1 is a side view showing the entire asphalt road surface cutting device of the present invention.

FIG. 2 is a plan view of the asphalt road surface cutting device.

FIG. 3 is an operation explanatory view at the time of construction of the asphalt road surface cutting device.

FIG. 4 is a side view of a conventional asphalt road surface cutting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Asphalt pavement road 2 Generator vehicle 3 Generator 4 Heat exchanger 5 Steam blower 6 Heat cutting vehicle 7 First digging means (surface cutting tine) 8 Watering means (watering nozzle) 9 Water supply tank 10 Microwave generator 11 Waveguide Pipe 12 Microwave antenna section 13 Microwave 14 Second excavation means (cutting tine) 15 Cutting removal means (blade) 16 Belt conveyor 17 Enclosure 18 Cooling fan 19 Exhaust fan 20 Surface scraping layer 21 Water containing layer 22 Scrapping section 23 Trestle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-228912 (JP, A) JP-A-8-120617 (JP, A) JP-A-8-209621 (JP, A) Japanese Utility Model 7- 23004 (JP, U) Japanese Utility Model 60-148309 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01C 23/12 E01C 23/14 E01C 23/00

Claims (2)

(57) [Claims] 1. An asphalt road surface cutting apparatus for removing degraded asphalt on a pavement road by using a microwave irradiation means for heating the inside of asphalt by microwaves and a cutting and removing means for cutting and removing the heated asphalt. Watering means for spraying water mixed with
A first excavating means for excavating or scraping only the surface of the asphalt before spraying the water mixed with the surfactant, and a first excavating means for excavating or scraping the asphalt after microwave irradiation and before cutting and removing by the cutting and removing means. An asphalt road surface cutting device, comprising: 2. The asphalt road surface cutting device according to claim 1, wherein the asphalt surface is preheated by using exhaust gas discharged from a generator before excavating or scraping the asphalt by the first excavating means.