JPH0215686B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field The present invention is applicable to trial excavation work, pipeline construction, and local pavement replacement work on paved roads, and to the use of bulldozers, backhoes, and other road surface tools in such pipeline construction and pavement construction. The present invention relates to a paved road surface opening construction method that is useful when locally opening a paved road surface when opening a claw insertion port of a stripping machine.

(b) Prior art In the conventional pavement opening method in the above sense, the pavement surface is cut along the periphery of the planned opening using a road cutting machine, and then the cut pavement slab is cut using a breaker or the like. The paved road surface is opened by tearing off the crushed pavement slab using a bulldozer, backhoe, etc. Naturally, such road surface openings are filled with new paving material and laminated. It was supposed to be restored.

However, the conventional construction method described above involves the process of crushing the cut pavement slabs using a breaker, etc., which has the serious drawback of causing severe vibration and noise pollution to construction workers and the roadside environment. had. In addition, the conventional construction method requires a large number of man-hours for the above-mentioned pavement slab crushing and stripping process, and when there is a considerable amount of time between the pavement slab crushing and stripping process and the next process. ,
There were some difficulties in the work process, such as the need to temporarily restore the road surface openings in order to open the road to traffic. Furthermore, the conventional construction method had another problem in that it required waste disposal of crushed and stripped pavement slabs.

(c) Purpose of the Invention The purpose of the present invention is to provide a paved road opening method that does not cause significant vibration or noise pollution to construction workers or the roadside environment. Another object of the present invention is to provide a paved road surface opening construction method that simplifies the process and reduces the number of man-hours. Furthermore, another object of the present invention is to provide a method for opening a pavement surface that does not require waste disposal of crushed and stripped pavement slabs.

(d) Structure and operation of the invention In order to achieve the above object, the first invention cuts the paved road surface so that at least a portion thereof tapers in the depth direction along the periphery of the planned opening area. This disclosure also discloses a method for opening a paved road surface, which is characterized by including a step of pulling up and removing the cut columnar pavement slab. Moreover, this second invention
A process of cutting a paved road surface so that at least a portion thereof tapers in the depth direction along the periphery of the planned opening, and pulling up and removing the cut columnar pavement slab, and the removed columnar pavement slab. Discloses a paved road surface opening construction method characterized by including a step of restoring the paved road surface opening using.

In the above, the removal of the cut columnar pavement slab, the movement of the removed columnar pavement slab, and the fitting into the road surface opening are performed by, for example, one or more buried columns by driving and/or screwing together before and after cutting. Further attachment of hooks and the like can be carried out by means of cranes, chain blocks, hydraulic jacks, etc., if necessary, via the anchors (including inserts and others having similar functions). After burial, such an anchor is kept below the surface of the pavement until it is used, and only at the time of use, its upper end projects above the surface of the pavement and, if necessary, a hook is attached to its opening. The paved road surface, including the planned area, can be opened to traffic until just before the pavement opening work.

For cutting the paved road surface, a normal road cutting machine can be used for vertical cutting, and for inclined cutting to taper in the depth direction, for example, a disk-shaped blade can be attached so as to be tiltable at the required angle. , a known road slope cutting machine can be employed. The cutting depth of a paved road surface depends on the structure of the pavement, the thickness of the asphalt layer and concrete layer, etc., but it is usually within the range of 20 to 70 cm. 5~
It is possible to cut at an angle of about 10 degrees while maintaining sufficient work efficiency. Note that the shape of the cut, ie, the shape of the opening and the size of the cut, should be selected depending on the type of road surface opening work, the condition of the road surface, workability, etc. In this case, from the viewpoint of cutting workability including oblique cutting, only straight cutting is sufficient.
For example, it is preferable to cut into rectangular or other polygonal shapes, but by using curved cutting in combination with the cutting operation, or by employing only curved cutting such as circular cutting, the linear cutting can be mutually reduced. By eliminating excess cuts that normally occur at intersecting corners, it is possible to prevent undesirable stress concentration and deterioration of aesthetic appearance.

A road surface cut that tapers in the depth direction, that is, an inclined cut,
It is sufficient that the cutting is performed on at least a part of the circumference of the planned opening, but it should be carried out over as wide a range as possible, preferably over one-half of the circumference, so that the vertical cross section of at least a part of the columnar pavement slab to be cut is It is more desirable to have a substantially V-shape. In the case of rectangular cutting, it is preferable to cut at least two opposing sides of the four sides of the rectangle so that they taper in the depth direction. For example, if a rectangular opening is to be made in a paved road surface over a relatively long distance with a predetermined width during pipeline construction, etc., first, two parallel slanted cuts are made in the predetermined width to form a roughly V-shaped cross section. Then, vertical cuts are made in the direction intersecting those cutting lines, for example, in the right angle direction, at predetermined intervals, that is, at intervals where removable columnar pavement slabs are obtained (however, oblique cuts may be made at both ends). All you have to do is to divide it, and then pull up and remove each divided columnar pavement slab in sequence.

Such slant cutting makes it easier to remove the columnar pavement slab after cutting and to fit the previously removed columnar pavement slab into the road surface opening when restoring the road surface opening. Regardless of whether pavement slabs are used or not, it is possible to construct a strong and stable pavement based on the sloped cut surface of the existing pavement when restoring road surface openings.

In addition, when restoring the road surface opening using the removed columnar pavement slab, for example, the internal roadbed and other parts may be adjusted as necessary, and the columnar pavement slab cross section and the road surface opening may be restored as necessary. After cleaning and priming the existing pavement cross section, insert the columnar pavement slabs, inject and fill the joints with epoxy resin paving agent, other caulking agents, sealants, and joint fillers, and further as necessary. All you have to do is apply sanding or surface construction. Further, instead of the caulking agent, or together with the caulking agent, an asphalt roofing material having double-sided adhesive properties may be used to join the existing pavement cross section and the columnar pavement slab cross section at the joint.

Next, the present invention will be specifically explained based on the drawings. FIG. 1 is a plan view after cutting a paved road surface showing an example of the paved road surface opening method according to the present invention, and FIG. 2 is a cross-sectional view taken along the line - - in FIG. Length 150cm x Width 100cm
Rectangular oblique cutting (oblique cutting angle of 10 degrees on all four sides)
is applied, and four anchors 3 are buried in the cut columnar pavement slab 2 before and after the cutting.
Although detailed illustrations of these anchors 3 are omitted, known anchors are used, which basically consist of a bolt part, a tubular leg part passed through the bolt part, a tapered part that spreads the bolt part, etc. Furthermore, since the upper end of the bolt portion is held below the surface of the paved road surface 1 until use, it is possible to open the cut columnar pavement slab 2 to traffic. The cut portions 4 on the four sides of the columnar pavement slab 2 pass diagonally through the surface layer, the base layer 5, and the roadbed 6 to reach the roadbed 7, and are 50 cm deep in this example.

FIG. 3 is a cross-sectional view when the columnar pavement slab 2 is removed in FIG. After the hooks 8 are pulled out, they are attached, and the hooks 8 and the crane hook 9 hanging above them are connected via a wire rope 10, and are connected by the operation of a crane (not shown). The columnar pavement slab 2 is lifted up and removed.

In addition, as described above, the road surface opening 11 that has been created in this way can be closed using the columnar pavement slab 2 that was removed earlier and can be restored by caulking the joint area. Depending on the situation, sliding, surface layer construction, covering the 3 parts of the anchor, filling, etc. may be performed.

(e) Effects of the Invention Due to the above configuration, this invention does not cause significant vibration or noise pollution to construction workers or the roadside environment, simplifies the process, reduces man-hours, and can be used up until just before construction begins. Column pavement slabs after cutting, including slope cutting, which can be maintained open to traffic and opened to traffic relatively quickly after construction, do not require waste disposal of crushed and stripped pavement slabs. This makes it easier to fit the previously removed columnar pavement slab into the road surface opening during the removal work and restoration of the road surface opening. This has excellent effects such as being able to construct a strong and stable pavement based on the sloped cut surface of the existing pavement during restoration.

[Brief explanation of drawings]

Fig. 1 is a plan view after cutting the paved road surface showing an example of the paved road surface opening method according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is the removal of the columnar pavement slab in Fig. 2. FIG. (Explanation of symbols), 1...Paved road surface, 2...Column pavement slab, 3...Anchor, 4...Cutting part, 5...
Surface layer and base layer, 6... roadbed, 7... roadbed, 8...
Hook, 9... Crane hook, 10... Wire rope, 11... Road surface opening.

Claims (1)

[Claims] 1. The method includes the step of cutting the paved road surface so that at least a portion thereof becomes tapered in the depth direction along the periphery of the planned opening, and pulling up and removing the cut columnar pavement slab. Paved road surface opening construction method featuring: 2. The pavement opening method according to claim 1, wherein one or more anchors are embedded in the cut columnar pavement slab. 3. The paved road surface opening construction method according to claim 1, wherein the paved road surface is cut into circular shapes. 4. The paved road surface opening construction method according to claim 1, wherein the paved road surface is cut into squares. 5. The paved road surface opening method according to claim 4, wherein at least two opposing sides of the four sides of the quadrangle are cut so as to taper in the depth direction. 6. A process of cutting the paved road surface so that at least a portion of the paved road surface tapers in the depth direction along the periphery of the planned opening, and pulling up and removing the cut columnar pavement slab, and the removed columnar pavement. A paved road surface opening construction method characterized by including a step of restoring an opening in a paved road surface using a plate. 7. The pavement opening method according to claim 6, wherein one or more anchors are embedded in the cut columnar pavement slab. 8. The paved road surface opening construction method according to claim 6, wherein the paved road surface is cut into circular shapes. 9. The paved road surface opening construction method according to claim 6, wherein the paved road surface is cut into squares. 10 At least two opposing sides of the four sides of the rectangle are cut so that they taper in the depth direction.
A paved road surface opening construction method according to claim 9.