JPH0718621A - Pavement cutting and removing engineering method - Google Patents

Abstract

PURPOSE:To cut a pavement in the shape of a ring including a bent part to a required depth and to prevent the generation of surplus cut-in the bent part during circular butting at the time of removing a cut pavement block. CONSTITUTION:In an engineering method for cutting a pavement l like a ring including a bent part (corner part 4) to a required depth and removing a cut pavement block, the pavement 1 is cut like a ring to a required depth, with the bent part left undone by a disc blade 3. In the bent part, the pavement is cut to a required depth by a vibrating chisel 5 including a bent blade 6 of the same shape as that of the bent part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement cutting and removing method for cutting a pavement in an annular shape and removing the cut pavement mass during a road trial digging work or a pavement work around a road-occupied object.

[0002]

2. Description of the Related Art Road excavation work includes a step of cutting a pavement into an annular shape such as a quadrangle or a circle and crushing the cut pavement mass or removing it without crushing it. It includes a step of cutting the pavement around the road occupation such as a manhole frame into a ring shape such as a square or a circle and crushing the cut pavement mass or removing it without crushing, but all of the above constructions make the pavement ring shape. It requires a method of cutting to the required depth and removing the cut pavement mass.

When cutting the pavement into a circular shape, it can be carried out without problems by rotating the cylindrical bit around its central axis or by continuously moving the disk-shaped blade along a circular orbit. However, when the pavement is cut into an annular shape including a bent portion such as a quadrangular shape, even if a straight portion or a relatively large curved portion can be easily cut with a disc-shaped blade, a circular portion such as a corner portion is cut. In order to achieve the required depth of cutting even in the bent portion where the plate blade cannot pass, it is necessary to advance the disc blade until the center of the blade exceeds the bent portion. Excessive cutting deviating from the above, that is, surplus cutting is inevitably generated.

However, even if only the opening is closed by finishing repair, the margin on the pavement impairs the aesthetics and strength and allows rainwater to enter the interior of the pavement to lower the bearing capacity of the pavement. Cause problems.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to cut a pavement into an annular shape including a bent portion to a required depth and to remove a cut pavement mass without cutting a pavement at the bent portion. To provide a removal method.

[0006]

A pavement cutting and removing method according to the present invention is a method of cutting a pavement into an annular shape including a bent portion to a required depth and removing the cut pavement mass.
The pavement is characterized in that it is cut to a required depth in an annular shape with a disc-shaped blade leaving the bent portion, and is cut to the required depth only by vibration provided with a bending blade having the same shape as the bent portion.

[0007]

In the annular cutting of the pavement, the portion other than the bent portion is cut to the required depth by the disc blade, and the bent portion which cannot be cut to the required depth by the disc blade is cut to the required depth only by vibration. The cutting with the disk-shaped blade can be performed, for example, by a known paving cutting wheel equipped with the blade, and the cutting only by vibration can be performed, for example, by a known breaker to which the blade is attached. It does not matter which of the cutting by the disc-shaped blade and the cutting by the vibration precedes, but in that the cutting groove end of the disc-shaped blade can be guided only by the vibration, the former cutting can precede. preferable.

[0008] The cut pavement lump is, for example, Japanese Patent Publication No. 61-2.
As disclosed in Japanese Patent Publication No. 5844, Japanese Patent Publication No. 61-33938, Japanese Patent Publication No. 63-55562, etc., it is detached by known means such as crushing or lifting depending on the purpose and the like. It should be noted that, in the annular cutting, even if a part of overlapping cutting or a part of uncutting occurs near the boundary between the cutting part by the disk-shaped blade and the cutting part only by vibration, this does not hinder the main removal process of the pavement mass.

[0009]

FIG. 1 shows an annular cutting step in a pavement cutting and removing method according to an embodiment of the present invention, (A) is a plan view after annular cutting, and (B) is a sectional view at the time of cutting with a disc-shaped blade. , (C) is a sectional view at the time of cutting only by vibration, and (D) is a perspective view of a main part only by vibration.

In FIG. 1, the pavement 1 is cut into a rectangular ring shape to a required depth, the straight line portion 2 is cut by a disc-shaped blade 3, and each corner portion 4 which is a bent portion is shown in FIG. It is cut by only the vibrations 5 as shown, which vibrations 5 are provided with bending blades 6 of the same shape as the corners 4 and having a substantially right angle. The cutting with the disk-shaped blade 3 is performed to each corner 4 or to the front thereof so as not to exceed each corner 4 in the straight line portion 2 as indicated by the diagonal lines in FIG.
The required cutting depth has not been reached in the vicinity. Also,
As shown by the diagonal lines in the opposite direction to the above, the vibration-only cutting 5 cuts each corner 4 and its vicinity that cannot be cut to the required depth by the disk-shaped blade 3 to the required cutting depth. It

2A and 2B show an annular cutting step in the prior art, FIG. 2A is a plan view after the annular cutting, and FIG. 2B is a sectional view at the time of cutting with a disc-shaped blade.

In the figure, the pavement 1 is a disc-shaped blade 3
Due to this, a rectangular annular shape is cut to a required depth, and each corner portion 4 that is a bent portion also has a cross-shaped extra cut 6 in order to cut to a required depth. The cutting by the disc-shaped blade 3 is performed until the center of the disc-shaped blade 3 reaches each corner 4, as shown by the hatched portion in FIG. 1B, and as a result, the extra cut 6 is inevitably produced. .

[0013]

Since the present invention is constructed as described above,
When the pavement is cut to an annular shape including the bent portion to a required depth and the cut pavement mass is removed, it is possible to prevent an excess cut from being generated in the bent portion during the annular cutting.

[Brief description of drawings]

1 shows an annular cutting step in a pavement cutting removal method according to an embodiment of the present invention, (A) is a plan view after annular cutting, (B) is a cross-sectional view at the time of cutting with a disc-shaped blade,
(C) is a cross-sectional view at the time of cutting only by vibration, and (D) is a perspective view of a main part only by vibration.

FIG. 2 shows a circular cutting step in the prior art, (A)
Is a plan view after annular cutting, and (B) is a cross-sectional view at the time of cutting with a disc-shaped blade.

[Explanation of symbols]

 1 Pavement 3 Disc blade 4 Corner 5 Vibration only 6 Bending blade

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Tsubakimori 1 Eppo Co., Ltd., 1 Minami Dainichicho, Kyoshuji, Yamashina-ku, Kyoto-shi, Kyoto

Claims (1)

[Claims] 1. A method of cutting a pavement into an annular shape including a bent portion to a required depth and removing the cut pavement mass, in which the pavement is cut into an annular shape to a required depth while leaving a bent portion with a disc blade. A pavement cutting removal method characterized by cutting to a required depth only by vibration with a bending blade of the same shape as that of the section.