JP3579401B2 - Road groove formation method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a road surface groove forming method for forming a plurality of continuous grooves in parallel on a concrete or asphalt pavement road surface.
[0002]
[Prior art]
When a vehicle or an aircraft travels on a road surface at high speed during rainfall, the water film formed between the road surface and the tires causes the tires to float and not directly contact the road surface, resulting in an uncontrollable state in which neither the brake nor the steering wheel is effective. Hydroplaning phenomenon occurs. A grooving (safety groove) method for forming a plurality of grooves on a pavement surface has been devised in the United States in order to prevent an accident and a slip accident due to a hydroplaning phenomenon of an aircraft at an airport and to reduce an aircraft's takeoff and landing run distance. Was. In recent years, the grooving method has rapidly spread on general roads, expressways, and airport runways in Japan. When a plurality of continuous grooves are formed in parallel in the length or width direction of the road surface in parallel by the grooving method, it prevents slip accidents due to increased frictional force between the tire and the road surface, shortens the braking distance, and steers on curves. It can improve stability, improve drainage of road surface, prevent freezing, and prevent skidding in rainy weather. In addition, in the grooving method, various groove patterns are formed on the road surface by appropriately changing the combination of groove width, depth, and groove pitch according to the different conditions and environment of the road surface, and the type of expected accident. can do. Recently, grooving has been made on the sidewalks and passages of the shopping street where paving has been performed, by forming grooves in the form of vertical and horizontal grids, making the pavement surface look like tiles at first glance. Has also been constructed.
[0003]
As shown in FIG. 10, a blade assembly (30) for performing grooving includes a plurality of grinding blades (31) having the same outer diameter and a spacer (32) disposed between the grinding blades (31). It has a structure in which the grinding blade (31) is fixed to the shaft (33) at regular intervals by being mounted on the shaft (33). The blade assembly (30) is rotatably mounted on a frame (not shown), which is vertically and adjustably mounted on a movable grinding device having a plurality of wheels. The grooves (21) can be continuously formed on the road surface (20) by the grinding blade (31) that comes into contact with the road surface (20) while integrally rotating the blade assembly (30) on the frame.
[0004]
[Problems to be solved by the invention]
Due to the contact and wear with the tire of the vehicle passing on the road surface even once on the grooved road surface, the groove (21) is crushed or worn out after several years, as shown in FIG. The wear debris (24), sand or asphalt pieces, etc., accumulate in the grinding grooves, and the original function of the grooves (21) is reduced or lost. Therefore, it is necessary to perform grooving again.However, when grooving is performed once on the grooved road surface (20), as shown in FIG. 12, an existing groove (21) or a road surface (20) having grooving marks is present. A new groove (21) is overlapped and formed at a stepped or irregular groove interval.
[0005]
In addition, unevenness, cracks, ruts, and steps near joints are formed on the pavement road with the passage of time with the passage of the vehicle. When grooving is performed on such an uneven road surface (20), FIG. As described above, even if the groove (21) is formed on the flat surface of the road surface (20), the grinding blade (31) of the grooving device does not reach the concave surface, and there is a problem that the groove (21) cannot be formed sufficiently. .
[0006]
Therefore, in the case of a road surface (20) having grooving marks and unevenness, it is necessary to apply an overlay in which concrete or asphalt is applied on the existing road surface (20) or a road surface layer removing method for removing the surface layer of the road surface. In the overlay construction method, which is the most widely used road repair method at present, a desired groove can be formed by burying concrete or asphalt to repair the flat road surface (20) and then performing grooving. However, in the overlay method, since traffic on the road surface must be stopped until the overcoated concrete or asphalt has dried and hardened, the construction period is long and the construction cost is high. In addition, if the skin layer formed by over-coating of concrete or asphalt is thin, peeling or cracking of the skin layer occurs, and conversely, if the skin layer is thick, there are many cases such as reduced drainage and reduced run-off. There are drawbacks.
[0007]
On the other hand, a road surface layer removing method for repairing the road surface (20) to be flat by grinding the surface of the damaged road surface (20) thinly without raising the height is called a grinding method, and in Europe and the United States, 1980 It has been introduced since the age. The road surface layer removing device used in the road surface layer removing method uses the same driving device as the grooving device, but has a smaller distance between adjacent blades and a smaller grinding depth than the blade assembly (30) shown in FIG. The road surface is ground into a shallow, narrow width straight stripe. In addition, between the adjacent grinding grooves, an unground linear pavement surface corresponding to the spacer arranged between the blades remains on the road surface, and a sharp unevenness in the form of straight stripes exhibits a slip prevention effect. The road surface layer removal method can regenerate a road surface only by grinding, unlike an overlay in which new pavement is made with concrete or asphalt. However, since the grooves formed on the road surface by the road surface layer removal method are relatively shallow, they are worn or crushed in a short period of time and their original functions are reduced, and they run at a high speed, such as an airport runway or a highway. In order to reliably suppress and prevent the slip accident and the hydroplaning phenomenon of an aircraft or a vehicle, the road surface layer removing method alone is not sufficient, and the road surface layer removing and grooving must be performed. However, at present, the only way to remove the surface layer and grooving of the road surface is to grind the road surface (20) with the road surface removal device and then form grooves on the road surface (20) with the grooving device. This leads to a longer time and higher costs.
[0008]
Therefore, an object of the present invention is to provide a road surface groove forming method for simultaneously performing surface layer removal and grooving on the road surface.
[0009]
[Means for Solving the Problems]
In the grooving method of forming a plurality of grooves (21) on the road surface (20) with which the tire of the vehicle or the aircraft comes into contact to increase the frictional force between the tire and the road surface, the road surface groove forming method according to the present invention is the same. A plurality of shallow cutting blades (1) having an outer diameter of and a plurality of deep cutting blades (2) having a diameter larger than the shallow cutting blade (1) are regularly attached to the same shaft (3) to form a blade assembly. Forming (4), attaching the blade assembly (4) to the frame (12) so that it can rotate integrally, and contacting the shallow cutting blade (1) and the deep cutting blade (2) with the road surface (20) Moving the frame (12) at right angles to the shaft (3) while rotating the blade assembly (4), with the shallow cutting blade (1) and the deep cutting blade (2). The ground surface (22) and the groove (21) are simultaneously formed on the road surface (20).
[0010]
Thereby, cracks formed on the surface of the road surface (20), puddles, irregularities such as unevenness, steps or ruts near joints can be removed, the road surface (20) can be reproduced flat, and the ground surface ( The drainage and slip prevention of the road surface (20) can be achieved by the groove (22) and the groove (21).
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a road surface groove forming method according to the present invention will be described below with reference to FIGS.
[0012]
As shown in FIGS. 1 and 2, a blade assembly (4) used in the present invention has a plurality of shallow cutting blades (1) having the same outer diameter and a larger diameter than the shallow cutting blade (1). A plurality of deep-cutting blades (2), and a shaft (3) for attaching the shallow-cutting blade (1) and the deep-cutting blade (2). In the illustrated embodiment, eight shallow-cutting blades (1) and one deep-cutting blade (2) are set as one set, a plurality of sets are arranged in a row, and the shallow-cutting blade (1) and the deep-cutting blade are arranged. The same shaft (3) is inserted into a center hole (6) formed in each of (2). In addition, the rod (8) is inserted into the through hole (7) formed on the same circumference in each of the shallow cutting blade (1) and the deep cutting blade (2), and the rod (8) is When mounted, the blade assembly (4) is firmly and integrally formed. Also, the shallow blade (1) and the deep cutting blade (2) are attached to the shaft (3) so as to be able to rotate integrally with the key (25) fixed to the shaft (3), and the deep cutting blade (2) having a large diameter Project discontinuously in the radial direction from the outer peripheral portion of the shallow cutting blade (1).
[0013]
As shown in FIG. 3, a grooving device (10) having a blade assembly (4) includes a chassis (11) suspended on a plurality of wheels (13), a wheel provided on the chassis (11), and A blade assembly having a power unit (14) operatively connected to (13), a frame (12) mounted on a chassis (11), and a shaft (3) rotatably supported by the frame (12). (4) and a rotary drive (16) for rotating the blade assembly (4). While the shaft (3) of the blade assembly (4) is operatively connected to the rotary drive (16) to rotate the blade assembly (4), the shallow cutting blade (1) and the deep cutting blade (2) are connected to the road surface. 1 and 4, the ground surface (22) and the groove (21) can be simultaneously and continuously formed on the road surface (20). Since a gap (1b) is provided between the tip (1a) of the adjacent shallow cutting blade (1), a ridge (23) is formed between the adjacent grinding surfaces (22) corresponding to the gap (1b). You. As shown in FIG. 5, a spacer (5) can be arranged between adjacent shallow cutting blades (1) and between deep cutting blades (2), and can be integrally fixed to the shaft (3). Further, as shown in FIG. 6, when a deep-cutting blade (2) is alternately arranged between adjacent wide-shallow-cutting blades (1) to form a blade assembly (4), the blade assembly (4) projects on a road surface (20). Article (23) is not formed.
[0014]
Further, the vertical height of the frame (12) is adjusted with respect to the chassis (11) by the lifting / lowering device (15), and the vertical depth of the frame (12) is changed to reduce the grinding depth of the blade assembly (4). Since the blade assembly (4) can be sufficiently lowered by the elevating device (15) with respect to the road surface (20) having an uneven surface, the lower surface of the uneven surface or the deeper and flatter surface (20) can be changed. Can be ground.
[0015]
Also, a small grooving device (10) shown in FIG. 8 has a chassis (11) suspended on a plurality of wheels (13), and is provided on the chassis (11) and operatively connected to the wheels (13). A power device (14), a shaft (3) rotatably supported by the chassis (11), and a rotation drive device (16) connected to the power device (14) and rotating the shaft (3), A blade assembly (4) similar to the grooving device (10) shown in FIG. 3 is attached to the shaft (3). In the small-sized grooving device (10), the frame is formed integrally with the chassis (11), and the entire grooving device (10) is inclined obliquely with the wheel (13) as a fulcrum, so that the blade assembly (4) is mounted on the road surface (20). ), The grinding surface (22) and the groove (21) can be formed on the road surface (20), so that the lifting device (15) is not required. In the grooving device (10), the shaft (3) may be rotated by the power device (14) without mounting another rotary drive device (16) independent of the power device (14).
[0016]
In addition, while suppressing the rise in frictional heat of the shallow cutting blade (1) and the deep cutting blade (2) generated during grinding of the road surface (20), cooling water serving as a lubricant on the ground surface is reduced by the shallow cutting blade (1). ) And the deep-cutting blade (2) may be provided with a water supply device, and further, a collecting device (not shown) for collecting concrete or asphalt grinding chips may be provided.
[0017]
The shallow cutting blade (1) and the deep cutting blade (2) for grinding a concrete or asphalt road surface are manufactured by a method similar to a grinding blade used in a normal grooving device or a surface layer removing device for a road surface. As shown in FIG. 9, a thin circular plate (17) having a center hole (6) formed therein and a number of arc-shaped tips (18) welded to the outer periphery of the circular plate (17) at regular angular intervals. And a slit (19) is formed between adjacent chips (18). The arc-shaped tip (18) has a structure in which diamond abrasive grains are hardened into a predetermined shape by metal bond, resin bond or ceramic bond. When the tips (18) of adjacent circular plates (17) are attached to the shaft (3) in the thickness direction as in the case of the blade shown in FIG. A road surface (20) having only 21) can be ground. Further, when the slit (19) of the adjacent circular plate (17) constituting the shallow cutting blade (1) or the deep cutting blade (2) is shifted in the circumferential direction and attached to the shaft (3), the slit (19 ) Does not contact the road surface (20) at the same time, so that the impact of the slit (19) during road surface polishing and grinding can be reduced, and smooth grinding can be performed.
[0018]
When a plurality of shallow cutting blades (1) and one or more deep cutting blades (2) are regularly arranged on a shaft (3) to form a blade assembly (4), the length of the shaft (3) is increased. A grinding surface (22) and a groove (21) that are regularly aligned in the vertical direction can be formed on the road surface (20).
[0019]
For example, as shown in FIG. 2, when one deep-cutting blade (2) and eight shallow-cutting blades (1) are set as one set, and six sets are sequentially mounted on the shaft (3) in a predetermined order. As shown in FIG. 4, six grooves (21) and eight ground surfaces (22) ground between the grooves (21) can be formed on the road surface (20). As shown in FIG. 5, road surface processing is performed by a blade assembly (4) in which a spacer (5) is arranged between a plurality of shallow cutting blades (1) and between the shallow cutting blade (1) and the deep cutting blade (2). By doing so, a ridge (23) is formed at the position of the road surface (20) corresponding to the spacer (5), and the drainage function and the slip prevention function can be improved. Although not shown, if a blade assembly is constituted by a plurality of shallow cutting blades (1) and a single deep cutting blade (2), one groove (21) is formed as a snow melting groove on the road surface (20). Can be formed.
[0020]
The width and pitch of the deep-cutting blade (2) constituting the blade assembly (4) and the difference in outer diameter between the shallow-cutting blade (1) and the deep-cutting blade (2) depend on the safety formed on the road surface (20). These are the width, pitch and depth of the groove. The width of the blade assembly (4) is not limited, but is preferably 300 mm or more and 3000 mm or less, particularly preferably 1000 mm or more and 1250 mm or less. The width and pitch of the shallow blade (1) for grinding the road surface (20) greatly affect the life and friction of the ground road surface. In the present embodiment, the width of the shallow cutting blade (1) is 1 mm or more and 250 mm or less, and the pitch is 1 mm or more and 3.5 mm or less, and it is preferable to arrange about 18 blades per 100 mm of the shaft (3). On the other hand, the width of the deep-cutting blade (2) that forms the groove (21) on the road surface (20) is preferably 3 mm or more and 50 mm or less, and the pitch is 30 mm or more and 250 mm or less, depending on the construction purpose, road surface location, or environment. Thus, the width value can be appropriately set. For example, on a gentle slope, a gentle curve, or a place subject to cross wind, vertical grooves are formed parallel to the length of the road, but the width of the deep cutting blade (2) is about 6 mm and the pitch is about 40 mm. . At a steep part, on a bridge, a sharp curve, before an intersection, and in a tunnel, a horizontal groove is formed at right angles to the length of the road, but the width is about 6 mm and the pitch is about 50 mm. In addition, a drain groove formed on a highway with a large traffic volume for removing rainwater flowing into the rut has a width of about 25 mm or 35 mm and a pitch of about 200 mm. As shown in FIG. 6, the width of the shallow cutting blade (1) may be set larger than the width of the deep cutting blade (2), but the width of the shallow cutting blade (1) and the depth of the deep cutting blade (2) may be set. Is appropriately selected. In the present embodiment, the difference between the outer diameters of the shallow cutting blade (1) and the deep cutting blade (2) is 1 mm or more and 50 mm or less, preferably 3 mm or more and 25 mm or less.
[0021]
In the groove forming method of the present invention, a new groove (21) is formed on the road surface (20) by the deep cutting blade (2), and unevenness such as unevenness is removed by the shallow cutting blade (1). (20) can be reproduced flat. Usually, the concrete thickness or asphalt thickness of a pavement road is about 1000 mm on a highway and about 50 mm to 60 mm on a runway, and the number of times of grinding the road surface (20) is limited. May be applied on the road surface (20) a plurality of times, and then the road surface (20) may be re-paved. Grinding after re-paving allows long-term use of the road surface (20).
[0022]
According to the embodiment of the present invention, the following operations and effects can be obtained.
[1] The ground surface (22) and the groove (21) can be simultaneously and regularly formed on the road surface (20) by the shallow cutting blade (1) and the deep cutting blade (2).
[2] The road surface (20) is ground flat by the shallow cutting blade (1) to remove unevenness such as cracks, ruts, and steps near joints formed on the surface of the road surface (20). 20) can be played.
[3] The ground surface (22) and the groove (21) promote the drainage of the road surface (20) and prevent slippage.
[4] The grinding depth of the blade assembly (4) can be adjusted, and the grinding surface (22) and the groove (21) can be formed at any depth.
[5] A ridge (23) can be formed between the plurality of shallow cutting blades (1) and between the shallow cutting blade (1) and the deep cutting blade (2), and the drainage function and the slip prevention function can be improved.
[0023]
【The invention's effect】
Since the ground surface and the groove can be simultaneously formed on the road surface, the construction time and labor can be greatly reduced, and the traffic regulation accompanying the construction can be quickly released to greatly reduce the construction cost.
[Brief description of the drawings]
1 is a perspective view showing a blade assembly used in the present invention; FIG. 2 is a cross-sectional view showing a first embodiment of a blade assembly used in the present invention; FIG. 3 is a left side view showing a grooving device; 4 is a sectional view of a road surface ground by the blade assembly of FIG. 2; FIG. 5 is a sectional view showing a second embodiment of a blade assembly used in the present invention; FIG. 6 is used in the present invention; FIG. 7 is a sectional view showing a third embodiment of the blade assembly. FIG. 7 is a sectional view showing a fourth embodiment of the blade assembly used in the present invention. FIG. 8 is a left side view showing a small grooving device. FIG. 9 is a front view showing a grinding blade used for a shallow cutting blade or a deep cutting blade. FIG. 10 is a perspective view showing a conventional blade assembly. FIG. 11 is a cross section showing a groove crushed or worn by passing a vehicle. Fig. 12 Grooving on the road surface in Fig. 11 Sectional view showing a groove line in the case of performing grooving on the road surface having a cross-sectional view [FIG. 13] uneven surface showing a groove line in the case EXPLANATION OF REFERENCE NUMERALS
(1) ・ ・ Shallow cutting blade, (2) ・ ・ Deep cutting blade, (3) ・ ・ Shaft, (4) ・ ・ Blade assembly, (5) ・ ・ Spacer, (11) ・ ・ Chassis, (12) ) ・ ・ Frame, (13) ・ ・ Wheels, (14) ・ ・ Power device, (15) ・ ・ Elevator, (16) ・ ・ Rotary drive, (19) ・ Slit, (20) ・ ・ Road surface , (21) ・ ・ Groove, (22) ・ ・ Grinding surface,

Claims (4)

In a grooving method of forming a plurality of grooves on a road surface with which a vehicle or an aircraft tire contacts, and increasing a frictional force between the tire and the road surface,
A process of forming a blade assembly by regularly attaching a plurality of shallow cutting blades having the same outer diameter and a plurality of deep cutting blades having a diameter larger than the shallow cutting blade to the same shaft,
A process of attaching the blade assembly to the frame so as to be integrally rotatable,
Contacting the road surface with the shallow cutting blade and the deep cutting blade, rotating the blade assembly, and moving the frame at right angles to the shaft,
A road surface groove forming method, wherein a ground surface and a groove are simultaneously formed on a road surface by a shallow cutting blade and a deep cutting blade. The method of claim 1, further comprising changing a vertical height of the frame with respect to a chassis supporting the frame. 3. The road surface groove forming method according to claim 1, further comprising a step of arranging a spacer between the plurality of shallow cutting blades and between the shallow cutting blade and the deep cutting blade. The road surface groove forming method according to any one of claims 1 to 3, including a step of forming a plurality of ground surfaces in parallel with the grooves and at regular intervals with a shallow cutting blade.

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