JPS6355562B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides information on the presence or absence of existing pipes and other underground structures, their locations, etc., during underground piping work, etc.
Concerning the test excavation method for paved roads, which is used to actually check the conditions.

In the conventional paved road trial excavation method, a concrete cutter is used to excavate a predetermined area of the paved road surface estimated from materials such as underground piping drawings, e.g. 100 cm in length.
×The method involved cutting into rectangular shapes of about 100 to 200 cm in width and 20 cm in depth, and then crushing and excavating them. There were problems such as the need to dispose of the paved slabs as waste.

The paved road trial excavation method according to the present invention solves the drawbacks of the conventional method described above, and the first invention includes cutting the paved road surface in a circular shape in the paved road trial excavation, and paving the road before or after the circular cutting. The second invention is characterized in that a lifting member is attached to the road surface, and the cut plate-shaped or columnar pavement slab is lifted up and removed via the lifting member, and the second invention provides a plate-shaped or columnar pavement plate that has been removed in this way. This is an addition to the first invention of restoring the borehole using the method.

In the present invention, cutting into an annular shape means cutting along various shapes, and includes, for example, not only conventional square cutting but also circular cutting and other cuts. In particular, in the case of circular cutting, there is no cross-cutting at the corners that occurs in conventional square cutting, so the aesthetic appearance and strength of the restored paved road surface will not be impaired. When cutting rectangular shapes or straight lines, a concrete cutter or concrete cutting vehicle can be used as usual, but when cutting circular shapes, for example, a disc-shaped blade installed vertically or nearly vertically is used. A method in which a concrete cutting wheel is driven in a circular manner, a method in which a cylindrical bit is driven in rotation about its vertical axis, etc. can be used.

In addition, to remove the cut plate-shaped or columnar pavement slab, use a lifting member such as a hook that is attached to the pavement surface by driving or screwing before or after cutting, and lift it upward using a crane, chain block, hydraulic jack, etc. It can be done by lifting up. When restoring the test hole using the removed plate-like or columnar pavement slab, the plate-like or columnar pavement slab can be replaced with the original one after adjusting and compacting the subgrade in the test hole as necessary. This can be done by fitting the joint as shown in the figure below and injecting and filling the joint with a caulking agent such as epoxy resin paving material.

To explain the present invention based on the drawings, FIGS. 1 and 2 are cross-sectional views illustrating an example of a paved road trial excavation method according to the present invention, in which a paved road 1 includes a surface layer, a base layer 2, a roadbed 3, and a subgrade. It has a pavement structure consisting of 4 parts,
A conduit 5 is buried underground. Therefore, the first
As shown in the figure, heavy machinery (not shown)
The paved road surface is cut into a circular shape with a diameter of about 100 to 150 cm, for example, to a required depth, for example, to the roadbed 3, using a cylindrical bit 6 installed. Next, as shown in FIG. 2, hooks 8 as lifting members are screwed into three places on the surface of the cut cylindrical pavement slab 7 (only two places are shown in the drawing), and these hooks 8 and crane hooks 9 are screwed together. A crane (not shown) is operated by connecting with a wire rope 10, and the cylindrical pavement slab 7 is lifted up and removed. Note that the test hole 11 that has been created can be further dug as necessary to confirm the position and condition of the buried pipe 5, but when backfilling and restoring it, the cylindrical pavement slab 7 that was removed earlier should be It can be used as is.

As described above, according to the pavement road trial excavation method according to the present invention, there is no need to crush the cut plate-shaped or columnar pavement slabs at the trial excavation site, so vibrations and noise to the roadside environment can be prevented, and removal is possible. By using disc-shaped or column-shaped pavement slabs for backfilling the test hole and for restoration, there will be no vibration and noise caused by crushing, and there will be no problems with waste disposal, and the restoration will be the final stage of the actual restoration. However, especially when cutting a paved road surface into a circular shape, there is a need for extra cutting as in rectangular cutting. Even if this does not occur and it becomes necessary to perform trial excavation near a green belt in the center of the road or other facilities on the road, if it is a rectangular cut, it will be necessary to do it at a specified distance from those facilities. In the case of circular cutting, it is possible to obtain effects such as cutting can be performed so as to be in contact with those facilities.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views illustrating an example of the paved road trial excavation method according to the present invention. 1...Paved road, 5...Pipe line, 6...Cylindrical bit, 7...Cylindrical pavement slab, 9...Crane hook, 11...Test hole.

Claims (1)

[Claims] 1. In trial excavation of a paved road, cutting the paved road surface into a ring shape, attaching a lifting member to the paved road surface before or after cutting the ring shape, and lifting the cut plate-shaped or columnar pavement slab with the lifting member. A test excavation method for paved roads characterized by lifting and removing the paved roads. 2. The paved road trial excavation method according to claim 1, wherein the paved road surface is cut into circular shapes. 3. In trial excavation of a paved road, cutting the paved road surface into a ring shape, attaching a lifting member to the paved road surface before or after cutting the ring shape, lifting the cut plate-shaped or columnar pavement slab via the lifting member and removing it; and a pavement road trial excavation method characterized by restoring a trial hole using a removed disc-shaped or columnar pavement slab. 4. The paved road trial excavation method according to claim 3, wherein the paved road surface is cut into circular shapes.