JP2000104272A - Cut formation method for open-cut hole opened in road pavement layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cut formation method for an open-cut hole causing no outbreak in a part crossing cut lines and simply restoring the pavement, even if a road pavement layer is linearly cut using a conventional, well-known disc cutter used for a long time without using any special equipment. SOLUTION: In a first construction term, a plurality of necessary diameter circular holes 2 are formed at such arrangement intervals as surrounding an opening area of an open-cut hole 1 in circumferential asphalt surrounding the opening area of the planned open-cut hole 1. In the second construction term, the asphalt in an interval formed between opposed, mutually adjoining circular holes is cut in a straight line shape so that the asphalt in a contour formed by connecting a plurality of circular holes 2 can be removed, and its removal can form the open-cut hole 2 of the prescribed dimension in the road.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for opening a drilled hole on a pavement surface of a road, for example, for installing a manhole, or a method for drilling a drilled hole under a road in a pavement layer. The present invention relates to a method for forming and cutting a drilled hole, which is adapted to the following.

[0002]

2. Description of the Related Art In the case of forming the above-mentioned cut-out hole in a road pavement layer, in a conventional general method, as shown in FIG. Point p, point b to point c, point c to point d, point d to the first point a, and cut the road pavement layer into a square shape in a straight line. The opening is formed.

In this case, since the road pavement layer has a required pavement thickness, points a, b, and c serving as corners are formed.
At points d and d, it is necessary to cross the disk-shaped cutter and cut into the road pavement layer.
At the points c and d, an extra pavement cut called an extra cut occurs.

[0004]

However, when the above-mentioned surplus occurs, for example, a manhole or the like is installed in an excavated hole opened in a road pavement layer, and then the surrounding pavement is restored at a later date. In order to prevent the remaining portion from having a bad influence on the already-paved portion, the pavement in the enlarged area including the remaining portion (indicated by a dashed line in FIG. 7) is cut and the crushed pavement material is removed. When performing restoration work such as rolling down the roadbed and repaving after removing it, it is necessary to perform restoration processing of the whole of the above-mentioned expanded area extensively in terms of road management,
Therefore, there are inconveniences such as requiring a lot of materials for restoration, and a long construction time for restoration, which increases costs.

Conventionally, as a construction example in which the above-mentioned surplus cutting does not occur, a method of cutting a road pavement surface into a circular shape has been proposed as disclosed in Japanese Patent Publication No. 61-25844. In such a case, a special cutter for cutting the pavement road surface into a circular shape and equipment and equipment having a special circular cutting mechanism are required, and the implementation requires high equipment costs and requires special techniques for construction, etc. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems, and a road pavement layer can be formed by using a conventionally-known and familiar disk-shaped cutter without requiring special equipment. The present invention provides a method for forming a cut hole in an excavated hole, in which a pavement can be easily restored even if the cutting line is cut in a straight line without generating any extra cut at the intersection of the cutting lines.

[0007]

In order to achieve this object, an invention according to claim 1 is a method for forming a cut hole having a required size in a road pavement layer. A plurality of circular holes having a required diameter are formed in the peripheral road pavement layer surrounding the opening region at an arrangement interval surrounding the opening region of the cut hole, and in the second step, the plurality of circular holes are formed. On the other hand, a road pavement layer in a contour connecting a plurality of circular holes can be removed by cutting a road pavement layer between opposing circular holes in a straight line. It is characterized in that a cutout hole of a required size is formed in the layer.

[0008] In the first aspect of the present invention, in the first step, when the cut hole to be opened is square, the circular hole formed in the road pavement layer surrounding the opening area of the cut hole is square. Are formed at four locations on the diagonal of the cut hole.

According to a third aspect of the present invention, in the first step, the circular hole formed in the peripheral road pavement layer surrounding the opening area of the cutout hole has a dimension corresponding to the thickness of the road pavement layer, and It is characterized in that the inner diameter is set.

According to a fourth aspect of the present invention, in the second step, the cutting line for linearly cutting the road pavement layer between opposing circular holes is formed by connecting the outer tangential directions of the opposing circular holes to each other. It is characterized by cutting to tie.

According to a fifth aspect of the present invention, there is provided a method of forming a cut hole having a required size in a road pavement layer.
The road pavement layer around the opening area of the planned drilling hole is cut linearly so as to surround and not intersect, and in the second step, a circular hole having a required diameter is formed so as to be in contact with the above-mentioned linear cutting line adjacent to each other. It is characterized by the following.

[0012]

The operation of the method according to the present invention is as follows. According to the first aspect of the present invention, a plurality of circular holes formed in the first step are opened in a peripheral road pavement layer surrounding a predetermined opening region of a cut hole using a circular cutter. In the second step, the road pavement layer between the adjacent circular holes is cut straight using a conventionally known disk-shaped cutter.

At this time, the straight cutting of the road pavement layer described above
Since a plurality of circular holes opened in the periphery to surround the planned opening area of the drilled hole are cut so as to connect one adjacent circular hole and the other circular hole, the intersection of the cutting lines is performed. Since there is a circular hole of a required diameter in the portion, no crossover occurs in the crossover portion.

Further, in the first step, a circular hole can be formed in the road pavement layer by using a conventionally-known and familiar circular cutter, so that the operation can be performed easily. Using a familiar disk-shaped cutter,
Since the road pavement layer between the adjacent circular holes is cut in a straight line, the operation can be easily performed.

According to a second aspect of the present invention, when the hole to be opened is a quadrangle, circular holes are formed at four diagonal lines of the rectangular hole, and the circular hole is formed as described above. In such a case, a square cut hole can be formed extremely easily by straight-line cutting such that the four circular holes are connected to each other.

According to the third aspect of the present invention, since the circular hole is set to have substantially the same inner diameter as the dimension corresponding to the pavement thickness of the road pavement layer, the circular hole has a relatively small diameter. Therefore, when a circular cutter is used for forming a circular hole, the circular cutter may be small, so that the size of the construction equipment can be reduced, and the transportation of the construction equipment becomes easy.

According to a fourth aspect of the present invention, when the road pavement layer between the opposing circular holes is cut in a straight line in the second step, the cutting line is aligned with the outer tangential direction of the opposing circular holes. Since the cut is formed so as to be continuous, the cut hole formed in the road pavement layer has no step in the cut pavement layer on the peripheral wall, and a clean cut hole can be formed.

According to a fifth aspect of the present invention, in the first step,
The road pavement layer in the periphery surrounding the planned opening area of the cut hole is cut straight so as not to cross. That is, the planned opening area of the cut hole is cut into a square shape having no corners. next,
In the second step, circular holes having a required diameter are formed so as to be in contact with the above-mentioned straight cutting lines adjacent to each other. In this way, since a circular hole having a required diameter is present at the intersection of the straight cutting lines, the intersection is not cut off.

[0019]

FIG. 1 is a plan view of a drilled hole 1 to be opened on a road surface. In the present embodiment, the shape of the cutout hole 1 is described as a square shape, but the method of the present invention can cope with a circular manhole cover.

First, as a first embodiment, as shown in FIG. 2, circular holes 2 are formed at four diagonal lines of the drilled hole 1, that is, at four corners of the drilled hole 1 as a first step. The diameter of the circular hole 2 is approximately the same as the thickness of the asphalt, for example, when the thickness of the asphalt is 20 cm, the diameter 2
0cm circular hole is formed but other diameter 15 ~ 30c
A circular hole 2 having a size of about m may be used.

The circular hole 2 is formed by using a circular cutter 3. As shown in FIG. 3, the circular cutter 3 has a pedestal 31 on which a support 32 on which a feed of a rack or the like is formed stands upright.
To move up and down. A cylindrical cutter 35 is detachably mounted on the operating member 34. The cutter 35
An uneven cutter blade 35a is formed at the lower end of the asphalt, and is configured to cut the asphalt into a circular shape by pressing the asphalt while rotating the cutter 35.

Next, as a second step, the asphalt surrounding the perforated hole 1 is cut linearly so as to linearly connect the opposing circular holes 2 to each other. As a cutting means, a well-known and conventionally used disk cutter is used.
As shown in the figure, the asphalt between the outer tangential directions of the circular holes 2 is cut. In this way, since the circular hole 2 is present at the intersection of the straight cutting lines, no crossover occurs at the intersection. In addition, since the straight cut line is cut so as to be continuous with the outer tangential direction of the opposed circular hole 2, the cut hole 1 cut and formed in the asphalt does not have a step on the cut pavement layer on its peripheral wall, and is clean. The cut hole 1 can be formed, the cut shape becomes substantially rectangular, and the cut shape has an aesthetic appearance.

After the completion of the second step, the asphalt in the cut area is removed, earth and sand and the like are discharged from the ground, the drilled holes are dug deep, and manhole blocks are sequentially stacked to construct manholes.

As a second embodiment, as shown in FIG. 5, in the first step, asphalt around the cut hole 1 is cut straight so as to surround the cut hole 1 and not to intersect.
That is, the periphery of the cut hole 1 is cut into a square shape having no corners. Next, in a second step, as shown in FIG. 6, a circular hole 2 having a required diameter so as to be in contact with the above-mentioned linear cutting line adjacent to each other.
To form In this manner, as in the first embodiment, since the circular hole 2 is present at the intersection of the straight cutting lines, the intersection is not cut off. Further, since the straight cutting line is cut so as to be continuous with the outer tangential direction of the opposed circular hole 2, the cut hole 1 cut and formed in the asphalt does not generate a step in the cut pavement layer on its peripheral wall.
A beautiful cut hole 1 can be formed, the cut shape becomes substantially rectangular, and the cut shape has an aesthetic appearance.

[0025]

According to the first and fifth aspects of the present invention, the straight cutting of the road pavement layer is performed with respect to a plurality of circular holes opened in the periphery so as to surround the planned opening area of the cut hole.
Since the cutting is performed so as to connect one of the adjacent circular holes and the other circular hole, the crossing portion of the cutting line has a circular hole of a required diameter, so that the crossing portion does not have any remaining portion.

According to a second aspect of the present invention, when the hole to be opened is a quadrangle, circular holes are formed at four diagonal lines of the rectangular hole, and the circular hole is formed as described above. In such a case, a square cut hole can be formed extremely easily by straight-line cutting such that the four circular holes are connected to each other.

According to the third aspect of the present invention, since the diameter of the circular hole is set to be substantially the same as the inner diameter of the road pavement layer, the diameter of the circular hole is relatively small. Therefore, when a circular cutter is used to form a circular hole, the circular cutter may be small, so that the construction equipment can be miniaturized and the transportation of the construction equipment becomes easy.

According to a fourth aspect of the present invention, when the road pavement layer between the opposing circular holes is cut in a straight line in the second step, the cut line is in the outer tangential direction of the opposing circular holes. Since the cut is formed so as to be continuous, the cut hole formed in the road pavement layer has no step in the cut pavement layer on the peripheral wall, and a clean cut hole can be formed.

[Brief description of the drawings]

Fig. 1 Installation diagram of manhole cover

FIG. 2 is an explanatory view of a first step in the first embodiment.

FIG. 3 is an explanatory view of a circular cutter in the first embodiment.

FIG. 4 is an explanatory view of a second step in the first embodiment.

FIG. 5 is an explanatory view of a first step in the second embodiment.

FIG. 6 is an explanatory view of a second step in the second embodiment.

FIG. 7 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Manhole cover 2 Circular hole 3 Circular cutter

Claims (5)

[Claims] 1. A method for opening a drilled hole of a required size in a road pavement layer, wherein in a first step, an opening of the drilled hole is formed in a surrounding road pavement layer surrounding an opening area of the planned drilled hole. A plurality of circular holes having a required diameter are formed at an arrangement interval surrounding the area. In the second step, a road pavement layer between the circular holes adjacent to each other is linearly formed with respect to the circular holes. It is possible to remove a road pavement layer in a contour connecting a plurality of circular holes by cutting into a hole, and by forming an opening in the road pavement layer by removing the road pavement layer, Cutting formation method. 2. The method according to claim 1, wherein, in the first step, when the drilling hole to be opened is square, a circular hole formed in a road pavement layer surrounding the opening area of the drilling hole is formed on a diagonal line of the square drilling hole. 2. The method for forming a cut hole according to claim 1, wherein the hole is formed at four locations. 3. In the first step, the circular hole formed in the surrounding road pavement layer surrounding the opening area of the cutout hole is formed by setting a dimension corresponding to the thickness of the road pavement layer to an inner diameter of the circular hole. The method for forming a cut hole according to claim 1 or 2, wherein the hole is cut. 4. In the second step, the cutting line for linearly cutting the road pavement layer between opposing circular holes is cut so as to connect the outer tangential directions of the opposing circular holes to each other. The method for forming a cut hole according to any one of claims 1 to 3, wherein: 5. A method for opening a drilled hole having a required size in a road pavement layer, wherein in a first step, the road pavement layer is formed in a straight line so as to surround a road pavement layer around an opening area of a planned drilling hole and not to intersect. In a second step, a circular hole having a required diameter is formed so as to be in contact with the above-mentioned linear cutting line adjacent to each other.