JP6811987B2 - Cutting method and cutting equipment used for this method - Google Patents

Description

The present invention relates to a cutting method and an apparatus for cutting a concrete layer under a tile surface formed by adhering a plurality of tiles to a tunnel wall surface for repair.

Generally, in buildings such as tunnels, piers, and buildings that have concrete walls, deterioration and peeling of concrete walls and reinforcing bars due to vibration during vehicle running, the effects of acid rain, and alkali-aggregate reaction. Damage such as corrosion may occur.

Then, when damage such as deterioration or peeling of the concrete wall surface or corrosion of the reinforcing bar occurs, in order to repair the damaged part, a part of the damaged concrete wall surface is conventionally suspended and the damaged part is organically attached. Repair measures such as applying a system paint or filling with mortar have been taken (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-148847 (paragraph 0004 and others)

By the way, in the case of a tunnel, the concrete that makes up the tunnel is alkaline, and it reacts with carbon dioxide contained in the exhaust gas of the vehicle to neutralize the concrete, and the neutralization progresses from the concrete surface to the inside, so that the strength of the concrete In order to prevent such concrete neutralization, tiles are usually attached to the concrete at least at the bottom of the tunnel, and the tiles may exceed their useful life or be damaged. If this happens, it will be necessary to carry out repair work to prevent the neutralization of the underlying concrete layer.

In this way, in order to prevent the neutralization of the concrete that composes the tunnel, it is necessary to carry out the construction with the lane closed and the traffic of the vehicle stopped, which requires efficient repair work. In the above-mentioned conventional construction method, the tile to be repaired is peeled off, the lower adhesive layer and the concrete wall surface are squeezed, and a formwork for applying paint or mortar is installed on the concrete wall surface. Since it is necessary to apply it, in addition to the work of peeling the tile, the work of installing the formwork, the work of applying mortar etc. inside the formwork, etc. are required, especially for cutting concrete, excavation drill Since it is common to use mortar and there is a problem of poor work efficiency, it is desired to realize efficient repair work of the concrete layer under the tile in the tunnel.

In particular, in the conventional excavation drill method, an adhesive layer for adhering tiles tends to remain, and after the tiles are peeled off, the work of peeling the adhesive layer by the pressure of high-pressure water must be performed again, which is very inefficient. There is. Further, when the tile and the adhesive layer are peeled together by high-pressure water, the unevenness of the concrete surface becomes large. On the other hand, it is conceivable to peel off only the tile with high-pressure water, but in this case as well, high water pressure is required, so the moment the tile is peeled off, the underlying adhesive layer also penetrates and the concrete surface is scraped unnecessarily. There is an inconvenience. By the way, it is conceivable to cut the concrete layer together with the tile with the rotary blade, but there is a disadvantage that a large load is applied to the rotary blade, the life of the rotary blade is shortened, and the cost is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cutting device capable of efficiently repairing a concrete layer under a tile in a tunnel.

In order to achieve the above object, the cutting method according to the present invention is a cutting method for cutting the concrete layer under the tile surface formed by adhering a plurality of tiles to the tunnel wall surface for repair. , The step of moving the cutter means having the rotary blade to make a cut in the tile to be repaired and the adhesive layer below it, and moving the cutting means to cut the tile to be repaired and its adhesive layer having a cut. It is characterized by including a step of cutting the lower concrete layer to a predetermined depth.

Further, the cutting device according to the present invention is a cutting device that cuts a concrete layer under the tile surface formed by adhering a plurality of tiles to the tunnel wall surface for repair, and is installed along the tunnel wall surface. A plurality of rails, a pedestal mounted so as to be able to travel on the plurality of rails, at least two moving pedestals movably installed on the pedestal, and installed on one of the moving pedestals. A cutter means having a rotary blade for making a cut in the tile to be repaired and an adhesive layer below the tile to be repaired, and the tile and adhesion to be repaired which are installed on the other moving table and have a cut in advance by the cutter means. The cutting means for cutting the layer to cut the lower concrete layer, and the amount of pressing of the cutter means and the cutting means against the concrete wall surface are controlled, and the depth of the cut by the cutter means and the cutting means by the cutting means. It is characterized by including a pressing control means for controlling the cutting depth of the concrete layer and a dust collecting means for collecting cutting chips of the concrete layer cut by the cutting means.

According to such a configuration, by making a cut in the tile to be repaired and the adhesive layer under the tile by the cutter means, the tile and the adhesive layer can be cut at once by the cutting means, and the concrete layer. It becomes possible to cut the tile to a desired depth with high accuracy, and repair can be performed very efficiently.

Further, it is preferable that at least two strut bodies erected on the gantry and at least two support means for vertically and vertically movably supporting the cutter means and the cutting means on each of the different strut bodies may be further provided.

By doing so, the cutter means and the cutting means can be moved up and down, and even if the repair area of the concrete wall surface is a large area, it can be efficiently repaired.

Further, a vertical movement control means for controlling the vertical movement of the cutter means and the two support means for supporting each of the cutting means may be further provided.

In this way, when repairing a large-area repair area, it is possible to make a cut with high accuracy by the cutter means, and then the cutting can be repaired more efficiently by the cutting means.

According to the present invention, by making a cut in the tile to be repaired and the adhesive layer under the tile by the cutter means, the tile and the adhesive layer can be cut at once by the cutting means, and a concrete layer is desired. It is possible to cut with high accuracy by the depth of, and it is possible to repair the concrete wall surface very efficiently.

It is the schematic which shows one Embodiment of the cutting apparatus which concerns on this invention. It is a partial side view of FIG. It is a partial front view of FIG. It is a partial plan view of FIG. It is a plan view of a part of the cutter means of FIG. It is a partial figure of the cutting means of FIG. It is explanatory drawing of the process of making a cut by the cutting apparatus of FIG. It is sectional drawing of FIG.

An embodiment of the cutting apparatus according to the present invention will be described with reference to FIGS. 1 to 8.

As shown in FIGS. 1 and 2, two rails 2 and 2 are installed along the concrete wall surface of the tunnel T on the base 1 arranged in the tunnel T, and the two rails 2 and 2 are placed on the rails 2 and 2. A plurality of pedestals 3 are mounted so as to be able to travel, a workbench 4 on which an operator rides is mounted on each pedestal 3, and a support column 5 formed in a U-shaped frame shape on each pedestal 3. Is placed. At this time, the gantry 3 travels on the rails 2 and 2 by being driven by a motor.

Then, as shown in FIGS. 1 to 4, one support column 5 is equipped with two cutter means 6 that can move up and down along the support column 5, and the other support columns 5 are equipped with two cutter means 6. , Two cutting means 7 are mounted so as to be vertically movable along the support column 5. Although two cutting means 7 are shown in FIGS. 3 and 4, the cutter means 6 is supported by the support 8 in the same manner as these cutting means 7.

Here, as shown in FIG. 2, the hook 9 is locked to the central locking portion 8a of the long support 8 provided in the direction of the rail 2 in order to support the two cutter means 6. At the same time, in order to support the two cutting means 7, the hook 9 is locked to the central locking portion 8a of the long support 8 provided in the direction of the rail 2, and one end of the cable 10 is attached to the hook 9. The cable 10 is hung on a pulley 11 which is fixed and attached to the center of the upper side of the support column 5, the other end of the cable 10 is connected to a winch mechanism (not shown), and the winch is operated by rotating the handle 12 in both directions. The cable 10 is wound in both directions by the mechanism, so that the cutter means 6 and the cutting means 7 each move up and down along the support column 5 while controlling the amount of up and down movement.

The support 8, the hook 9, the cable 10, and the winch constitute a support means that supports the cutter means 6 and the cutting means 7 so as to be vertically movable along the support column 5. Further, the winch mechanism described above constitutes a vertical movement control means for controlling the vertical movement of each of the cutter means 6 and the cutting means 7. In FIG. 2, reference numeral 13 denotes a beam for reinforcing the fixing of each of the plurality of support columns 5 to the gantry 3.

Then, as shown in FIGS. 2 to 4, two cutter means 6 and two cutting means 7 are supported on each of the supports 8 constituting the support means, and the handle 15 rotates in both directions. By the operation, both cutter means 6 move in conjunction with the direction of approaching and separating from the concrete wall surface of the tunnel T, and both cutting means 7 move in conjunction with the direction of approaching and separating from the wall surface of tunnel T. The cutter means 6 and the cutting means 7 are supported by the support mechanism. Here, the amount of pressing of the cutter means 6 and the cutting means 7 against the concrete wall surface by the support mechanism is controlled according to the operation amount of the handle 15, and the depth of the cut by the cutter means 6 is controlled by the support mechanism. A pressing control means for controlling the cutting depth of the concrete layer by the cutting means 7 is configured.

By the way, as shown in FIG. 5, the cutter means 6 has a plurality of rotary blades 6a, and the plurality of rotary blades 6a are rotatably supported by a U-shaped holder 6b. As shown in FIG. 6, the cutting means 7 has a plurality of cutting blades 7c provided with a large number of protrusions 7b on the outer periphery of the disk 7a, and these plurality of rotary blades 7c are rotatably supported by a U-shaped holder 7d. Both the cutter means 6 and the cutting means 7 are powered and rotationally driven by a generator G mounted on the loading platform of the truck TR arranged outside the tunnel T as shown in FIG. It has become.

Further, as shown in FIG. 1, in the vicinity of the cutter means 6 and the cutting means 7, dust is collected for collecting dust and dirt of tiles, adhesive layers, concrete layers and the like generated by the operation of the cutter means 6 and the cutting means 7. The tip of the hose H is arranged and dust is collected by the dust collector D to prevent the scattering of dust and dirt on the tile, adhesive layer and concrete layer generated by the operation of the cutter means 6 and the cutting means 7.

Then, as shown in FIG. 7, the cutter means 6 is first driven in advance to align the cutter means 6 with the height position of the tile 17 to be repaired, and the cutter means 6 is moved vertically and horizontally as shown in FIG. In addition, vertical and horizontal cuts 19 are formed in the tile 17 to be repaired and the adhesive layer 18 under the tile 17 to be repaired. After that, the cutting means 7 is moved vertically and horizontally to cut the tile 17 to be repaired and the adhesive layer 18 of the lower layer having formed the cut 19, and the concrete layer 20 of the lower layer is cut to a predetermined depth. At this time, by controlling the pressing amount of the concrete wall surface of the cutting means 7, the concrete layer 20 can be cut by a desired depth (for example, 2 to 3 mm). At this time, the cut 19 may be formed only in the lateral direction, and the cutting means may be moved only in the lateral direction.

In addition, the dust and dirt generated when the cut 19 is formed by the cutter means 6 by the dust collector D, the dust and dirt of the tile 17 cut and peeled off by the cutting means 7, and the dust and dirt of the adhesive layer 18 and the concrete layer 20 are collected. Collected.

After that, the surface of the cut concrete layer 20 is sprayed with high pressure water of 5 to 10 MPa to clean the surface of the concrete layer 20, and a water-based epoxy mortar is applied to the surface of the cleaned concrete layer 20 and further on the surface. A tunnel interior coating agent such as Hypercerazex T, trade name, is applied to finish the surface, and the surface of the concrete layer 20 is protected instead of the tile.

Therefore, according to the above-described embodiment, by making a cut 19 by the cutter means 6 in the tile 17 to be repaired and the adhesive layer 18 under the tile 17, the tile 17 and the adhesive layer 18 are simultaneously cut by the cutting means 7. It can be cut, and the concrete layer 20 can be cut to a desired depth with high accuracy, and repair can be performed very efficiently.

Further, by making a cut 19 by the cutter means 6 in the tile 17 to be repaired and the adhesive layer 18 under the tile 17, the load on the rotary blade 7c of the cutting means 7 can be reduced, and the life of the rotary blade 7c can be reduced. Can be extended, and the maintenance cost of the cutting means 7 can be reduced.

Further, since the cutter means 6 and the cutting means 7 are supported vertically on the support columns 5 erected on the three racks, the cutter means 6 and the cutting means 7 can be moved up and down. Even if the repair area of the concrete wall surface is large, it can be repaired efficiently.

In addition, since the surface of the cut concrete layer 20 is finished by applying a water-based epoxy mortar and a tunnel interior coating agent such as the trade name Hypercerazex T, the concrete layer can be easily applied without attaching tiles as before. It is possible to prevent the neutralization of 20 and the work efficiency is good.

Further, since the dust and dirt of the tile 17, the adhesive layer 18 and the concrete layer 20 cut by the dust collector D are collected, it is possible to prevent the dust and dirt from being scattered and to eliminate the need for a large-scale cleaning work afterwards. It is possible to further improve the efficiency of.

The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, there is only one strut body 5, and the cutter means 6 and the cutting means 7 may be provided on one strut body.

Further, in the above-described embodiment, the case of repairing the concrete layer 20 under the vertical tile surface formed by attaching tiles to the substantially vertical wall surface at the lower part of the tunnel has been described, but the curved concrete layer at the upper part of the tunnel has been described. In the case of repairing, the cutter means 6 and the cutting means 7 may be sequentially replaced and attached to the arm tips of the mini back hoes so that the curved tile 17, the adhesive layer 18, and the concrete layer 20 at the upper part of the tunnel can be cut. ..

Further, in the above-described embodiment, the case where the surface of the cut concrete layer 20 is coated with a tunnel interior coating agent such as a water-based epoxy mortar and the trade name Hypercerazex T to finish the surface has been described. Instead of applying the paint, the tile may be reattached as before.

2 ... Rail 3 ... Stand 5 ... Strut body 6 ... Cutter means 7 ... Cutting means 8 ... Support (support means)
9 ... Hook (support means)
10 ... Cable (support means)
15 ... Handle 17 ... Tile 18 ... Adhesive layer 19 ... Cut 20 ... Concrete layer T ... Tunnel

Claims (4)

It is a cutting method that cuts the concrete layer under the tile surface formed by adhering multiple tiles to the tunnel wall surface for repair.
The process of moving the cutter means having a rotary blade to make a cut in the tile to be repaired and the adhesive layer below it,
A cutting method comprising a step of moving a cutting means to cut the cut tile to be repaired and an adhesive layer thereof to cut a lower concrete layer to a predetermined depth. It is a cutting device that cuts the concrete layer under the tile surface formed by bonding multiple tiles on the tunnel wall surface for repair.
Multiple rails installed along the tunnel wall and
A pedestal mounted so as to be able to run on the plurality of rails, and
A cutter means having a rotary blade installed on the gantry and making a cut in the tile to be repaired and the adhesive layer under the tile,
A cutting means for cutting the tile and the adhesive layer to be repaired, which are installed on the gantry and have been cut in advance by the cutter means, to cut the lower concrete layer.
A pressing control means that controls the pressing amount of each of the cutter means and the cutting means against the concrete wall surface, and controls the depth of the cut by the cutter means and the cutting depth of the concrete layer by the cutting means.
A cutting apparatus including a dust collecting means for collecting cutting chips of the concrete layer cut by the cutting means. At least two stanchions erected on the gantry and
The cutting apparatus according to claim 2, wherein each of the different strut bodies is further provided with the cutter means and at least two supporting means for vertically movablely supporting the cutting means. The cutting apparatus according to claim 3, further comprising a vertical movement control means for controlling the vertical movement of the cutter means and the support means for supporting each of the cutting means.

Images